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Si21-205A
ii Table of Contents
1.5 Detailed Explanation of Setting Modes ..................................................60
1.6 Centralized Group No. Setting ...............................................................64
2. Settings Concerning Maintenance ........................................................65
2.1 Indoor Unit PCB .....................................................................................65
2.2 Outdoor Unit PCB (25/35 class) .............................................................67
2.3 Outdoor Unit PCB (50/60 class) .............................................................69
3. Maintenance Mode Setting ...................................................................71
Part 7 Function and Control........................................................ 73
1. Indoor Unit.............................................................................................74
1.1 Function Outline .....................................................................................74
1.2 Electric Function Parts ...........................................................................75
1.3 Function Details......................................................................................76
2. Outdoor Unit (25/35 class) ....................................................................86
2.1 Function of Thermistor ...........................................................................86
2.2 Mode Hierarchy ......................................................................................88
2.3 Frequency Control..................................................................................89
2.4 Controls at Mode Changing / Start-up....................................................91
2.5 Discharge Pipe Temperature Control.....................................................92
2.6 Input Current Control..............................................................................92
2.7 Freeze-up Protection Control .................................................................93
2.8 Heating Peak-cut Control .......................................................................93
2.9 Fan Control.............................................................................................94
2.10 Moisture Protection Function 1 (Securing of Differential Pressure and
Blown Air Temperature) .........................................................................94
2.11 Moisture Protection Function 2...............................................................95
2.12 Defrost Control .......................................................................................96
2.13 Electronic Expansion Valve Control .......................................................97
2.14 Malfunctions .........................................................................................100
2.15 Forced Operation Mode .......................................................................101
2.16 Voltage Detection Function ..................................................................101
3. Outdoor Unit (50/60 class) ..................................................................102
3.1 Function of Thermistor .........................................................................102
3.2 Mode Hierarchy ....................................................................................104
3.3 Frequency Control................................................................................105
3.4 Controls at Mode Changing / Start-up..................................................107
3.5 Discharge Pipe Temperature Control...................................................108
3.6 Input Current Control............................................................................108
3.7 Freeze-up Protection Control ...............................................................109
3.8 Heating Peak-cut Control .....................................................................109
3.9 Fan Control...........................................................................................110
3.10 Moisture Protection Function 2.............................................................110
3.11 Low Hz High Pressure Limit .................................................................111
3.12 Defrost Control .....................................................................................111
3.13 Electronic Expansion Valve Control .....................................................112
3.14 Malfunctions .........................................................................................115
3.15 Forced Operation Mode .......................................................................116
3.16 Voltage Detection Function ..................................................................116
Содержание
- Applied models 1
- Si21 205a 1
- Split system air conditioners skyair b series r410a 1
- Field piping and wiring 6 2
- Introduction vii 2
- List of functions 2
- Method of field set reset after maintenance inspection repair 4 2
- Models 2
- Part 1 model name and power supply 2
- Part 2 functions 2
- Part 3 specifications 2
- Part 4 remote controller 7 2
- Part 5 field piping and wiring 5 2
- Part 6 field setting 3 2
- Specifications 2
- Split system split system split system split system air conditioners air conditioners air conditioners air conditioners skyair b series skyair b series skyair b series skyair b series r410a r410a r410a r410a 2
- Table of contents 2
- Wired remote controller 8 2
- Wireless remote controller 2 2
- Indoor unit 4 3
- Maintenance mode setting 1 3
- Outdoor unit 25 35 class 6 3
- Outdoor unit 50 60 class 02 3
- Part 7 function and control 3 3
- Settings concerning maintenance 5 3
- Error codes and led indication 39 5 troubleshooting for indoor unit 42 4
- Part 8 troubleshooting 17 4
- Self diagnosis by led 38 4
- Self diagnosis by remote controller 33 4
- Troubleshooting based on equipment condition 19 4
- Troubleshooting for outdoor unit 25 35 class 64 4
- Ffq25 35 50 60bv1b 30 5
- Fhq35 50 60buv1b 55 5
- Outdoor unit 25 35 class 64 5
- Part 9 removal procedure 29 5
- Troubleshooting for outdoor unit 50 60 class 95 5
- Drawings flow charts v 6
- Index i 6
- Interchange ability 21 6
- Outdoor unit 50 60 class 86 6
- Part 10 appendix 11 6
- Piping diagrams 12 6
- Wiring diagrams 17 6
- Caution in repair 8
- Introduction 8
- Safety cautions 8
- Warning 8
- Caution 9
- Cautions regarding products after repair 9
- Warning 9
- Caution 10
- Inspection after repair 10
- Warning 10
- Caution 11
- Icons are used to attract the attention of the reader to specific information the meaning of each icon is described in the table below 11
- Using icons 11
- Using icons list 11
- Part 1 model name and power supply 12
- Model name and power supply 13
- Models 13
- Note power supply intake outdoor units 13
- External appearance 14
- Indoor units 14
- Outdoor units 14
- Remote controller 14
- Part 2 functions 16
- Ffq fhq 17
- Improved points and functions 17
- List of functions 17
- No change no functions 17
- Part 3 specifications 18
- 25 class 19
- Ceiling mounted cassette type 19
- Specifications 19
- Specifications si21 205a 19
- 35 class 20
- Si21 205a specifications 20
- Specifications 9 20
- V 50hz 20
- 50 class 21
- Specifications 21
- Specifications si21 205a 21
- V 50hz 21
- Si21 205a specifications 22
- Specifications 11 22
- V 50hz 22
- 60 class 23
- Specifications 23
- Specifications si21 205a 23
- V 50hz 23
- Si21 205a specifications 24
- Specifications 13 24
- V 50hz 24
- 35 class 25
- Ceiling suspended type 25
- Specifications 25
- Specifications si21 205a 25
- V 50hz 25
- 50 class 26
- Si21 205a specifications 26
- Specifications 15 26
- V 50hz 26
- 60 class 27
- Specifications 27
- Specifications si21 205a 27
- V 50hz 27
- Part 4 remote controller 28
- Features 29
- Wired remote controller 29
- Inspection test operation button 30
- Installation 31
- Explanation of receiver 33
- Features 33
- Names and function 33
- Wireless remote controller 33
- Part 5 field piping and wiring 36
- About refrigerant r410a 37
- Characteristics of new refrigerant r410a 1 performance almost the same performance as r22 and r407c 2 pressure working pressure is approx 1 times more than r22 and r407c 3 refrigerant composition few problems in composition control since it is a quasi azeotropic mixture refrigerant 37
- Field piping and wiring 37
- Non azeotropic mixture refrigerant mixture of two or more refrigerants having different boiling points 37
- Outline 37
- Precautions for new refrigerant r410a 37
- Quasi azeotropic mixture refrigerant mixture of two or more refrigerants having similar boiling points 37
- The design pressure is different at each product please refer to the installation manual for each product reference 1 mpa 10 9716 kgf c 37
- Field piping and wiring 27 38
- Si21 205a field piping and wiring 38
- Thermodynamic characteristic of r410a 38
- Refrigerant cylinders 39
- As for the charge mouthpiece and packing 1 2unf20 is necessary for mouthpiece size of charge hose 40
- Material 40
- O o o o 1 2h 1 2h 1 2h 1 2h 1 2h 1 2h 40
- O o o o o 1 2h 1 2h 1 2h 1 2h 1 2h 40
- Pipe size 40
- R410a is used under higher working pressure compared to previous refrigerants r22 r407c furthermore the refrigerating machine oil has been changed from suniso oil to ether oil and if oil mixing is occurred sludge results in the refrigerants and causes other problems therefore gauge manifolds and charge hoses that are used with a previous refrigerant r22 r407c can not be used for products that use new refrigerants be sure to use dedicated tools and devices 40
- Service tools 40
- Thickness t mm 0 0 0 1 1 1 1 1 1 0 1 0 40
- Thickness t mm 0 0 0 1 1 1 1 1 1 1 40
- Tool compatibility 40
- Φ 6 φ 9 φ 12 φ 15 φ 19 φ 22 φ 25 φ 28 φ 31 φ 38 40
- Conventional flaring tools can be used when the work process is changed change of work process previously a pipe extension margin of 0 to 0 mm was provided for flaring for r410a air conditioners perform pipe flaring with a pipe extension margin of 1 to 1 mm for clutch type only conventional tool with pipe extension margin adjustment can be used 41
- Differences 2 change of dimension a 41
- Flaring tool 41
- Specifications 2 dimension a 41
- Unit mm 41
- Can not be used 44
- Ester oil or ether oil 46
- Flare nut 46
- Piping union 46
- Refrigerant piping drain piping and wiring for ffq model 46
- Refrigerant piping work for ffq model 46
- Spanner 46
- Torque wrench 46
- Nitrogen 47
- Part to be brazed 47
- Pressure reducing valve hands valve 47
- Taping refrigerant piping 47
- Attached 48
- Clamp 4 big 4 48
- Drain piping work for ffq model 48
- For liquid pipe 48
- Gas piping liquid piping 48
- Insulation for fitting attached 8 for gas pipe 48
- Insulation for fitting attached 9 48
- Small sealing pad attached 11 48
- Wrap the piping union with the sealing pad 48
- Adjustable drain hose attached 1 545 49
- Attached 49
- Attached attached 49
- Attached large sealing pad 10 49
- Ceiling slab 49
- Clamp 2 clamp 2 49
- Drain hose 1 tape gray 4mm 49
- Hanger bracket 49
- Slope downwards at a gradient of at least 1 100 to prevent air pocket from forming 49
- T joint converging drain pipes 49
- For the wiring of outdoor units refer to the installation manual attached to the outdoor units confirm the system type 51
- Group control 51
- Multi system 51
- Note 1 all transmission wiring except for the remote controller wires is polarized and must match the terminal symbol 2 in case a shielding wire is to be used connect a shielded portion with the of a remote controller terminal board also connect the ground for the remote control to a grounded metal part 3 for group control remote controller choose the remote controller that suits the indoor unit which has the most functions as attached swing flap 51
- Pair type 51
- Pair type multi system 51
- Remote controller controls 1 indoor unit standard system refer to fig 25 51
- Remote controller controls up to 16 indoor units all indoor units operate according to the remote controller refer to fig 27 51
- Remote controllers control 51
- Remote controllers control 1 indoor unit refer to fig 28 51
- Through 4 indoor units connect to 1 outdoor unit the indoor unit is controlled by remote controller connected to each indoor unit refer to fig 26 however the group control is not expected 51
- Wiring example for ffq model 51
- Electric wiring work for ffq model 52
- After connection attach sealing material 12 53
- Be sure to attach it to prevent the infiltration of water from the outside 53
- Connection of wiring between units ground wire and for the remote control cord refer to fig 29 53
- Fig 29 53
- Give enough slack to the wires between the clamp 4 and power supply terminal block use fig 30 as a guide and allow at least 80mm for removing the sheath 53
- Give enough slack to the wires between the clamp 4 and the terminal block for the remote controller 53
- Remove the control box lid and pull the wires inside through the hole and connect to the terminal block for remote controller 6p no polarity securely fix the remote controller cord with the included clamp 4 53
- Wiring between units and ground wire remove the control box lid and connect wires of matching number to the power supply terminal block 4p inside and connect the ground wire to the terminal block in doing this pull the wires inside through the hole and fix the wires securely with the included clamp 4 53
- Attach insulation sleeve 54
- Or more 54
- Round crimp style terminal 54
- Wiring between units 54
- Refrigerant piping drain piping and wiring for fhq model 55
- Refrigerant piping work 55
- Hands valve 56
- Nitrogen 56
- Pressure reducing valve 56
- Refrigerant piping part to be brazed 56
- Taping 56
- Drain piping work 58
- Air outlet 59
- Make sure not to splash the water 59
- Plastic container for pouring 59
- Wiring example 60
- Electric wiring work 61
- Attach insulation sleeve 63
- Connect wires of the same gauge to both side good 63
- Do not connect wires of different gauges wrong 63
- Do not connect wires of the same gauge to one side wrong 63
- Electric wire 63
- Good wrong wrong 63
- Round crimp style terminal 63
- Maintenance mode setting 1 64
- Method of field set reset after maintenance inspection repair 4 64
- Part 6 field setting 64
- Part 6 part 6 part 6 part 6 field setting field setting field setting field setting 64
- Settings concerning maintenance 5 64
- Explanation 65
- Field set is carried out from the remote controller at time of installation or after maintenance inspection repair carry out field set according to the explanation below incorrect settings will cause a malfunction to occur the indoor unit settings are sometimes changed if optional accessories are mounted on the indoor unit refer to the optional accessory manual 65
- Method of field set reset after maintenance inspection repair 65
- Field setting 66
- Wired remote controller 66
- Wireless remote controller 67
- Field setting 57 68
- Initial setting contents 68
- Si21 205a method of field set reset after maintenance inspection repair 68
- Example to set the filter sign time to filter contamination heavy for all units in a group set mode no to 10 setting switch no to 0 and setting position no to 02 69
- Local setting mode no 69
- Table fhq ffq 69
- Air flow direction setting ffq 71
- Detailed explanation of setting modes 71
- Fan speed off when thermostat is off ffq fhq 71
- Filter sign setting fhq ffq 71
- If switching the filter sign on time set as given in the table below set time 71
- Make the following air flow direction setting according to the respective purpose 71
- Range of air flow direction setting ffq 71
- Set the air flow direction of indoor units as given in the table below set when optional air outlet blocking pad has been installed the second code no is factory set to 01 71
- Setting table 71
- Used as a countermeasure against odor for barber shops and restaurants 71
- When the cool heat thermostat is off you can stop the indoor unit fan by switching the setting to fan off 71
- After completing setting seal off the opening of the address switch and the main sub switch with the attached sealing pad 72
- By setting to set fan speed you can switch the fan speed to the set fan speed when the heating thermostat is off 72
- Explanation if several wireless remote controller units are used together in the same room including the case where both group control and individual remote controller control are used together be sure to set the addresses for the receiver and wireless remote controller for group control see the attached installation manual for the indoor unit if using together with a wired remote controller you have to change the main sub setting or the receiver 72
- Fan speed changeover when thermostat is off ffq fhq 72
- Receiver setting set the wireless address switch ss2 on the transmitter board according to the table below 72
- Setting table 72
- Since there is concern about draft if using fan speed up when thermostat is off you should take the setup location into consideration 72
- When using both a wired and a wireless remote controller for 1 indoor unit the wired controller should be set to main therefore set the main sub switch ss1 of the transmitter board to sub 72
- Wireless setting address and main sub setting 72
- Centralized group no setting 75
- Indoor unit pcb 76
- Settings concerning maintenance 76
- Detail of pcb 1 78
- Field setting 67 78
- Outdoor unit pcb 25 35 class 78
- Outline of pcb 78
- Si21 205a settings concerning maintenance 78
- Detail of pcb 2 79
- Field setting 69 80
- Outdoor unit pcb 50 60 class 80
- Pcb 1 control pcb outdoor unit 80
- Pcb 2 power supply pcb service monitor pcb 80
- Si21 205a settings concerning maintenance 80
- Field setting 81
- Settings concerning maintenance si21 205a 81
- Maintenance mode setting 82
- Operation is not reset by malfunction code reset for inspection cannot be reset because the count is updated each time a malfunction occurs 82
- Procedure 1 enter the field set mode continue to push the inspection test operation button for a minimum of 4 seconds 2 enter the maintenance mode after having entered the field set mode continue to push the inspection test operation button for a minimum of 4 seconds 3 select the mode no set the desired mode no with the up down temperature setting button 4 select the unit no select the indoor unit no set with the time mode start stop button 5 carry out the necessary settings for each mode modes 41 44 and 45 see the table below for details 6 enter the setting contents modes 44 and 45 enter by pushing the timer on off button 7 return to the normal operation mode tap the inspection test operation button one time 82
- Indoor unit 4 84
- Outdoor unit 25 35 class 6 84
- Outdoor unit 50 60 class 02 84
- Part 7 function and control 84
- Part 7 part 7 part 7 part 7 function and control function and control function and control function and control 84
- Ffq b fhq b 85
- Function and control 85
- Function outline 85
- Indoor unit 85
- Indoor unit si21 205a 85
- Electric function parts 86
- Ffq bv1b 86
- Fhq buv1b 86
- Function details 87
- 1 1 when compressor stops during drain pump on after compressor operation started 90
- 1 2 when compressor stops during drain pump off after compressor operation started 90
- 1 basic operation 90
- 2 operations when an occurrence of drain water level abnormality 2 2 a behavior between occurrence and recovery of drain water level abnormality 90
- Compressor 90
- Drain pump 90
- Heating 90
- In heating operation of the unit equipped with a humidifier when interlocking of drain pump humidifier 15 25 3 is set to yes 02 the drain pump operates 20 min off and 3 min on repeatedly during compressor is in operation after compressor stops residual operation will be conducted for 5 minutes 90
- Min 20 min 90
- According to suction air temp 93
- Auto restart function 93
- Caution when performing maintenance and the power supply is to be shut off be sure to turn the remote controller s on off switch off first 93
- If there is a power cut when the unit is operating it will automatically resume the same operating mode when the power is restored 93
- Operation condition 93
- Program dry operation function 93
- Shutting the power supply switch off while the on off switch is still on is dangerous because the power failure automatic reset function will cause the indoor fan to start turning immediately or the outdoor unit fan to automatically start turning three minutes after the power supply is turned back on 93
- The points of thermostat on or off are determined according to the suction air temperature at the startup of unit operation the set temperature and flow rate are not displayed on remote controller 93
- Thermostat on point 93
- Fan and flap operations 94
- L or ll operation for ffq bv1 only l for 4way outlet and ll for 2way or 3way outlet 94
- Mode conflict overview while the indoor unit for another room and the outdoor unit are operating when the indoor unit for the own room is activated the operation mode which can be selected in the own room has some restrictions as mentioned below i in case an priority for operation mode selection is given to the own room by setting the dip switch of outdoor unit 95
- Note during automatic operation at the time of changing operation mode to automatic cooling or automatic heating the unit is operated as the table shown above 95
- Operation of the indoor unit for the own room during non operation fan off louver becomes horizontal position on led on the remote controller blinks indication of under central control on the remote controller displayed 95
- Operational 95
- The own room can be operated in any mode ii in case an priority for operation mode selection is not given to the own room by setting the dip switch of outdoor unit 95
- The unit can be operated as follows 95
- The unit for another room is switched into non operational condition non operational 95
- Function of thermistor 97
- Heat pump model 97
- Outdoor unit 25 35 class 97
- Cooling only model 98
- Detail 1 for heat pump model there are following modes stop cooling includes drying heating include defrosting 99
- For cooling only model there are following models stop and cooling including drying 99
- Function and control 99
- Mode hierarchy 99
- Note unless specified otherwise an indoor dry operation command must be regarded as cooling operation 99
- Outdoor unit 25 35 class si21 205a 99
- Outline there are two modes the mode selected in user s place normal air conditioning mode and forced operation mode for installation and providing service 99
- Frequency control 100
- D signal 1 p control calculate 101
- D signal and is used for frequency command 101
- D signal the difference between a room temperature and the temperature set by the remote controller will be taken as the 101
- D value in each sampling time 20 seconds and adjust the frequency according to its difference from the frequency previously calculated 2 i control if the operating frequency is not change more than a certain fixed time adjust the frequency up and down according to the 101
- D value is large increase the frequency 3 limit of frequency variation width when the difference between input current and input current drooping value is less than 1 a the frequency increase width must be limited 4 frequency management when other controls are functioning 101
- D value is small lower the frequency when the 101
- D value obtaining the fixed 101
- D value of the indoor unit and the q value of the indoor unit q value indoor unit output determined from indoor unit volume air flow rate and other factors 101
- D value when the 101
- Determine lower limit frequency 101
- For limiting lower limit frequency management is carried out only when the frequency rises 5 upper and lower limit of frequency by pi control the frequency upper and lower limits are set depending on indoor unit when low noise commands come from the indoor unit or when outdoor unit low noise or quiet commands come from indoor unit the upper limit frequency must be lowered than the usual setting 101
- Frequency initial setting 101
- Indoor frequency command 101
- Outline when starting the compressor or when conditions are varied due to the change of the room the frequency must be initialized according to the 101
- Pi control determine frequency up down by 101
- Set a maximum value as an lower limit frequency among the frequency lower limits of the following functions pressure difference upkeep 4 determine prohibited frequency 101
- Th off thermostat off 101
- There is a certain prohibited frequency such as a power supply frequency 101
- When frequency is drooping frequency management is carried out only when the frequency droops 101
- 3 minutes stand by 102
- Compressor protection function 102
- Controls at mode changing start up 102
- Four way valve operation compensation 102
- Four way valve switching 102
- Preheating operation 102
- Discharge pipe temperature control 103
- Input current control 103
- Freeze up protection control 104
- Heating peak cut control 104
- Fan control 105
- Moisture protection function 1 securing of differential pressure and blown air temperature 105
- Actual constant 106
- Common setting for 25 35 class 106
- Detail 106
- Doa outdoor air temperature cgc compressor guard for cooling cgw compressor guard for heating fcg frequency guard for compressor protection 106
- Moisture protection function 2 106
- Operation stop depending on the outdoor air temperature compressor operation turns off under the conditions that the system is in cooling operation and outdoor air temperature is below 10 c 106
- Outline in order to obtain the dependability of the compressor the compressor must be stopped according to the conditions of the temperature of the outdoor air and outdoor heat exchanger 106
- The set of a constant doa1cg doa2cg doa3cg fcg7 and fcg8 have constants for cooling heating separately and these constants are distinguished with a suffix c w 106
- Defrost control 107
- Detail conditions for starting defrost the starting conditions must be made with the outdoor air temperature and heat exchanger temperature under the conditions that the system is in heating operation 6 minutes after the compressor is started and more than 44 minutes of accumulated time pass since the start of the operation or ending the defrosting conditions for canceling defrost the judgment must be made with heat exchanger temperature 4 c 22 c 107
- Function and control 107
- Outdoor unit 25 35 class si21 205a 107
- Outline heat pump only defrosting is carried out by the cooling cycle reverse cycle the defrosting time or outdoor heat exchanger temperature must be more than its fixed value when finishing 107
- Detail the followings are the examples of control which function in each mode by the electronic expansion valve control 108
- Electronic expansion valve control 108
- Function and control 97 108
- Outline the following items are included in the electronic expansion valve control electronic expansion valve is fully closed 1 electronic expansion valve is fully closed when turning on the power 2 pressure equalizing control open control 1 electronic expansion valve control when starting operation 2 control when frequency changed 3 control for defrosting only for heat pump model 4 control when a discharge pipe temperature is abnormally high 5 control when the discharge pipe thermistor is disconnected feedback control 1 discharge pipe temperature control 108
- Si21 205a outdoor unit 25 35 class 108
- Disconnection of the discharge pipe thermistor 109
- Fully closing with power on 109
- High temperature of the discharge pipe 109
- Opening limit 109
- Pressure equalization control 109
- Starting operation control 109
- Control when frequency is changed 110
- Target discharge pipe temperature control 110
- Detection of overload and over current 111
- Insufficient gas control 111
- Malfunctions 111
- Sensor malfunction detection 111
- Detail forced cooling 112
- Forced operation mode 112
- Outline forced operating mode includes only forced cooling 112
- Power supply voltage is detected each time equipment operation starts 112
- Voltage detection function 112
- Function of thermistor 113
- Heat pump model 113
- Outdoor unit 50 60 class 113
- Cooling only model 114
- Detail 1 for heat pump model there are following modes stop cooling includes drying heating include defrosting 115
- For cooling only model there are following models stop and cooling including drying 115
- Function and control 115
- Mode hierarchy 115
- Note unless specified otherwise an indoor dry operation command must be regarded as cooling operation 115
- Outdoor unit 50 60 class si21 205a 115
- Outline there are two modes the mode selected in user s place normal air conditioning mode and forced operation mode for installation and providing service 115
- Frequency control 116
- D signal 1 p control calculate 117
- D signal and is used for frequency command 117
- D signal the difference between a room temperature and the temperature set by the remote controller will be taken as the 117
- D value in each sampling time 20 seconds and adjust the frequency according to its difference from the frequency previously calculated 2 i control if the operating frequency is not change more than a certain fixed time adjust the frequency up and down according to the 117
- D value is large increase the frequency 3 limit of frequency variation width when the difference between input current and input current drooping value is less than 1 a the frequency increase width must be limited 4 frequency management when other controls are functioning 117
- D value is small lower the frequency when the 117
- D value obtaining the fixed 117
- D value of the indoor unit and the q value of the indoor unit q value indoor unit output determined from indoor unit volume air flow rate and other factors 117
- D value when the 117
- Determine lower limit frequency 117
- For limiting lower limit frequency management is carried out only when the frequency rises 5 upper and lower limit of frequency by pi control the frequency upper and lower limits are set depending on indoor unit when low noise commands come from the indoor unit or when outdoor unit low noise or quiet commands come from indoor unit the upper limit frequency must be lowered than the usual setting 117
- Frequency initial setting 117
- Indoor frequency command 117
- Outline when starting the compressor or when conditions are varied due to the change of the room the frequency must be initialized according to the total of a maximum 117
- Pi control determine frequency up down by 117
- Set a maximum value as an lower limit frequency among the frequency lower limits of the following functions pressure difference upkeep 4 determine prohibited frequency 117
- Th off thermostat off 117
- There is a certain prohibited frequency such as a power supply frequency 117
- When frequency is drooping frequency management is carried out only when the frequency droops 117
- 3 minutes stand by 118
- Compressor protection function 118
- Controls at mode changing start up 118
- Four way valve operation compensation 118
- Four way valve switching 118
- Preheating operation 118
- Discharge pipe temperature control 119
- Input current control 119
- Freeze up protection control 120
- Heating peak cut control 120
- Fan control 121
- Moisture protection function 2 121
- Defrost control 122
- Detail conditions for starting defrost the starting conditions must be made with the outdoor air temperature and heat exchanger temperature under the conditions that the system is in heating operation 6 minutes after the compressor is started and more than 44 minutes of accumulated time pass since the start of the operation or ending the defrosting conditions for canceling defrost the judgment must be made with heat exchanger temperature 4 c 12 c 122
- Detail separate into zones 122
- Function and control 111 122
- Low hz high pressure limit 122
- Note drooping the system stops 2 minutes after staying in the drooping zone 122
- Outline heat pump only defrosting is carried out by the cooling cycle reverse cycle the defrosting time or outdoor heat exchanger temperature must be more than its fixed value when finishing 122
- Outline heat pump only set the upper limit of high pressure in a low hz zone set the upper limit of the indoor heat exchanger temperature by its operating frequency of hz separate into three zones reset zone unchanged zone and drooping zone and the frequency control must be carried out in such zones 122
- Si21 205a outdoor unit 50 60 class 122
- Detail the followings are the examples of control which function in each mode by the electronic expansion valve control 123
- Electronic expansion valve control 123
- Function and control 123
- Outdoor unit 50 60 class si21 205a 123
- Outline the following items are included in the electronic expansion valve control electronic expansion valve is fully closed 1 electronic expansion valve is fully closed when turning on the power 2 pressure equalizing control open control 1 electronic expansion valve control when starting operation 2 control when frequency changed 3 control for defrosting only for heat pump model 4 control when a discharge pipe temperature is abnormally high 5 control when the discharge pipe thermistor is disconnected feedback control 1 discharge pipe temperature control 123
- Disconnection of the discharge pipe thermistor 124
- Fully closing with power on 124
- High temperature of the discharge pipe 124
- Opening limit 124
- Pressure equalization control 124
- Starting operation control 124
- Control when frequency is changed 125
- Target discharge pipe temperature control 125
- Detection of overload and over current 126
- Insufficient gas control 126
- Malfunctions 126
- Sensor malfunction detection 126
- Detail forced cooling 127
- Forced operation mode 127
- Outline forced operating mode includes only forced cooling 127
- Power supply voltage is detected each time equipment operation starts 127
- Voltage detection function 127
- Error codes and led indication 39 5 troubleshooting for indoor unit 42 128
- Part 8 part 8 part 8 part 8 troubleshooting troubleshooting troubleshooting troubleshooting 128
- Part 8 troubleshooting 128
- Self diagnosis by led 38 128
- Self diagnosis by remote controller 33 128
- Troubleshooting based on equipment condition 19 128
- Troubleshooting for outdoor unit 25 35 class 64 128
- Troubleshooting for outdoor unit 50 60 class 95 129
- Troubleshooting based on equipment condition 130
- Activation or fault of overcurrent relay for fan motor 131
- Applicable model all models of skyair series 131
- Equipment does not operate 131
- Error detection method 131
- Error generating condition 131
- Faulty compressor protection thermostat 131
- Faulty contact point of magnetic switch for compressor 131
- Faulty magnetic switch for fan motor 131
- Faulty operation switch or contact point 131
- Faulty overcurrent relay for compressor 131
- Fuse blown or disorder of contact in operation circuit 131
- Insufficient insulation in electric system 131
- Malfunction of compressor 131
- Possible causes 131
- Troubleshooting 131
- Troubleshooting based on equipment condition si21 205a 131
- Indoor fan operates but compressor does not 132
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 133
- Troubleshooting 133
- Troubleshooting based on equipment condition si21 205a 133
- Air intrudes into refrigerant system 134
- Applicable model all models of skyair series 134
- Cooling heating operation starts but stops immediately 134
- Error detection method 134
- Error generating condition 134
- Excess charge of refrigerant 134
- Faulty aux relay for outdoor unit fan motor 134
- Faulty magnetic switch for outdoor unit fan motor 134
- Malfunction of indoor unit fan 134
- Malfunction of outdoor unit fan 134
- Possible cause 134
- Si21 205a troubleshooting based on equipment condition 134
- Soiled air filter of indoor unit 134
- Soiled heat exchanger of indoor unit 134
- Soiled heat exchanger of outdoor unit 134
- There is an interfering item in air flow of outdoor unit 134
- There is some interfering item in airflow of indoor unit 134
- Troubleshooting 134
- Troubleshooting 123 134
- After shutting down equipment does not restart for a while 135
- Applicable model all models of skyair series 135
- Compressor protection thermostat 135
- Compressor protection thermostat may act due to the following reasons internal leakage of four way valve there is no difference between suction and discharge temperature insufficient compression of compressor incorrect refrigerant faulty expansion valve insufficient circulation of refrigerant 135
- Error detection method 135
- Error generating condition 135
- Overcurrent relay for compressor 135
- Overcurrent relay may act due to the following reasons lower voltage of power supply excess level of high pressure insufficient size of power cable malfunction of compressor 135
- Possible cause 135
- Troubleshooting 135
- Troubleshooting based on equipment condition si21 205a 135
- Equipment operates but does not provide cooling 136
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 137
- Troubleshooting 137
- Troubleshooting based on equipment condition si21 205a 137
- Air intrudes into refrigerant system 138
- Applicable model all models of skyair series 138
- Equipment operates but does not provide heating 138
- Error detection method 138
- Error generating condition 138
- Excess charge of refrigerant 138
- Faulty aux relay for outdoor unit fan motor 138
- Faulty magnetic switch for outdoor unit fan motor 138
- Malfunction of indoor unit fan 138
- Malfunction of outdoor unit fan 138
- Possible cause 138
- Si21 205a troubleshooting based on equipment condition 138
- Soiled air filter of indoor unit 138
- Soiled heat exchanger of indoor unit 138
- Soiled heat exchanger of outdoor unit 138
- There is an interfering item in air flow of outdoor unit 138
- There is some interfering item in airflow of indoor unit 138
- Troubleshooting 138
- Troubleshooting 127 138
- Applicable model all models of skyair series 139
- Clogged air filter 139
- Equipment discharges white mist 139
- Error detection method 139
- Error generating condition 139
- Humid installation site 139
- Installation site is dirty and with dense oil mists 139
- Malfunction of fan motor 139
- Possible cause 139
- Soiled heat exchanger 139
- Troubleshooting 139
- Troubleshooting based on equipment condition si21 205a 139
- Air intrudes into refrigerant system 140
- Applicable model all models of skyair series 140
- Equipment produces loud noise or shakes 140
- Error detection method 140
- Error generating condition 140
- Excess charge of refrigerant 140
- Faulty installation 140
- Flushing noise due to refrigerant shortage sound of shoo 140
- Possible cause 140
- Si21 205a troubleshooting based on equipment condition 140
- Troubleshooting 140
- Troubleshooting 129 140
- Animal s hair 141
- Applicable model all models of skyair series 141
- Carpet spread room 141
- Equipment discharges dust 141
- Error detection method 141
- Error generating condition 141
- Possible cause 141
- Troubleshooting 141
- Troubleshooting based on equipment condition si21 205a 141
- Applicable model all models of skyair series 142
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 142
- Error detection method 142
- Error generating condition 142
- Possible cause 142
- Remote controller lcd displays 88 142
- Si21 205a troubleshooting based on equipment condition 142
- Troubleshooting 142
- Troubleshooting 131 142
- Applicable models ffq b fhq bu 143
- Faulty connector connection 143
- Faulty indoor unit pc board 143
- Faulty micro switch 143
- Faulty swing motor 143
- Malfunction decision conditions 143
- Method of malfunction detection 143
- Possible causes 143
- Swing flap does not operate 143
- Troubleshooting 143
- Troubleshooting based on equipment condition si21 205a 143
- Utilizes on off of the limit switch when the motor turns 143
- When on off of the micro switch for positioning cannot be reversed even through the swing flap motor for a specified amount of time about 30 seconds 143
- Explanation the following modes can be selected by using the inspection test operation button on the remote control 144
- Inspection mode 144
- Local setting mode service mode 144
- Normal mode 144
- Self diagnosis by remote controller 144
- Test operation mode 144
- The inspection test button 144
- Self diagnosis by wired remote controller 145
- Diagnosis by wireless remote controller 146
- Notes 1 there is a possibility of open phase power supply check power supply also 148
- Remote controller display malfunction code and contents 148
- Self diagnosis by led 149
- Self diagnosis with the led on the indoor unit 149
- Self diagnosis with the led on the outdoor unit 149
- Blinks 150
- Error codes and led indication 150
- High probability of malfunction 150
- Low probability of malfunction no possibility of malfunction do not replace 150
- Off no connection with troubleshooting 150
- Possibility of malfunction 150
- Symbols 150
- System 150
- Indoor unit 151
- Displayed only when system down occurs 152
- Outdoor unit 152
- Failure of indoor unit pc board 153
- Troubleshooting for indoor unit 153
- Malfunction of drain water level system float type 154
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 155
- Troubleshooting 155
- Troubleshooting for indoor unit si21 205a 155
- Applicable models fhq bu 156
- Error in drain pipe installation 156
- Failure of drain system 156
- Faulty float switch 156
- Faulty indoor unit pcb 156
- Malfunction decision conditions 156
- Method of malfunction detection 156
- Remote controller display 156
- Si21 205a troubleshooting for indoor unit 156
- Supposed causes 156
- Troubleshooting 156
- Troubleshooting 145 156
- Water leakage is detected based on float switch on off operation while the compressor is in non operation 156
- When the float switch changes from on to off while the compressor is in non operation 156
- Indoor unit fan motor lock 157
- Malfunction of indoor unit fan motor 158
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 159
- Check for the fan motor connector 159
- Check no 1 159
- Check no refer to p 62 159
- Connect correctly 159
- Remove the foreign matter 159
- Replace the fan motor 159
- Troubleshooting 159
- Troubleshooting for indoor unit si21 205a 159
- Turn off the power supply 159
- Yes replace the indoor unit pc board 159
- Swing flap motor malfunction lock 160
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 161
- Troubleshooting 161
- Troubleshooting for indoor unit si21 205a 161
- Failure of capacity setting 162
- Malfunction of heat exchanger thermistor r2t 163
- Malfunction of heat exchanger thermistor r3t 164
- Malfunction of suction air thermistor 165
- Malfunction of remote controller thermistor 166
- Applicable models ffq b fhq bu 167
- Failure of indoor unit pc board 167
- Failure of outdoor unit pc board 167
- Malfunction decision conditions 167
- Method of malfunction detection 167
- Microcomputer checks if transmission between indoor and outdoor units is normal 167
- Outside cause noise etc 167
- Power supply open phase 167
- Remote controller display 167
- Supposed causes 167
- Transmission error between indoor and outdoor unit 167
- Troubleshooting 167
- Troubleshooting diagnosis of incorrect or broken disconnected wiring if the leds on the indoor unit pc board are off it indicates that the transmission wiring between indoor and outdoor units may be incorrect or broken disconnected 167
- Troubleshooting for indoor unit si21 205a 167
- When transmission is not carried out normally for a certain amount of time 167
- Wiring indoor outdoor transmission wire is incorrect 167
- Applicable models ffq b fhq bu 168
- Connection of 2 master remote controllers when using 2 remote controllers 168
- Failure of indoor pc board 168
- Failure of remote controller 168
- Malfunction decision conditions 168
- Method of malfunction detection 168
- Microcomputer checks if transmission between indoor unit and remote controller is normal 168
- Outside cause noise etc 168
- Remote controller display 168
- Si21 205a troubleshooting for indoor unit 168
- Supposed causes 168
- Transmission error between indoor unit and remote controller 168
- Troubleshooting 168
- Troubleshooting 157 168
- When transmission is not carried out normally for a certain amount of time 168
- Applicable models ffq b fhq bu 169
- Connection among sub remote controllers 169
- Faulty remote controller pcb 169
- In case of controlling with 2 remote controller check the system using microcomputer if signal transmission between indoor unit and remote controller main and sub is normal 169
- Malfunction decision conditions 169
- Method of malfunction detection 169
- Normal transmission does not continue for specified period 169
- Remote controller display 169
- Supposed causes 169
- Transmission error between main and sub remote controller 169
- Transmission error between main remote controller and sub remote controller 169
- Troubleshooting 169
- Troubleshooting for indoor unit si21 205a 169
- Malfunction of field setting switch 170
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 171
- Troubleshooting 171
- Troubleshooting for indoor unit si21 205a 171
- Centralized address setting error 172
- Check no 1 check for fan motor connector power supply line 1 turn the power supply off with the relay connector disconnected measure the resistance between uvw phases of the connector 3 cores at the motor side then make sure that the resistance between each phase is balanced and not short circuited 173
- Checks for indoor unit 173
- Troubleshooting 173
- Troubleshooting for indoor unit si21 205a 173
- Check no 2 check for thermistors 174
- Disconnect the thermistor connector from pc board then measure the resistance by using a tester 174
- A compressor overload is detected through compressor ol 175
- Check no 1 refer to p 92 175
- Check no refer to p 87 175
- Check no refer to p 88 175
- Check no refer to p 89 175
- Electronic expansion valve defective 175
- Four way valve malfunctioning 175
- If the compressor ol is activated twice the system will be shut down 175
- Malfunction decision conditions 175
- Method of malfunction detection 175
- Ol activation compressor overload 175
- Outdoor unit pcb defective 175
- Refrigerant shortage 175
- Remote controller display 175
- Stop valve defective 175
- Supposed causes 175
- The error counter will reset itself if this or any other error does not occur during the following 60 minute compressor running time total time 175
- The operating temperature condition is not specified 175
- Troubleshooting 175
- Troubleshooting for outdoor unit 25 35 class 175
- Water mixed in the local piping 175
- A compressor lock is detected by checking the compressor running condition through the position detection circuit 176
- Clearing condition continuous run for about 5 minutes normal 176
- Compressor lock 176
- Compressor locked 176
- Malfunction decision conditions 176
- Method of malfunction detection 176
- Note if the model doesn t have spm replace the outdoor unit pcb 176
- Remote controller display 176
- Si21 205a troubleshooting for outdoor unit 25 35 class 176
- Supposed causes 176
- The system judges the compressor lock and cannot operation with position detection within 15 seconds after start up 176
- The system judges the compressor lock and stops due to over current 176
- The system will be shut down if the error occurs 16 times 176
- Troubleshooting 176
- Troubleshooting 165 176
- An input over current is detected by checking the input current value being detected by ct with the compressor running 177
- Check no refer to p 90 177
- Error detection due to outdoor unit pcb 177
- Input over current detection 177
- Malfunction decision conditions 177
- Method of malfunction detection 177
- Note if the model doesn t have spm replace the outdoor unit pcb 177
- Over current due to compressor failure 177
- Over current due to defective outdoor unit pcb 177
- Over current due to defective power transistor 177
- Over current due to short circuit 177
- Remote controller display 177
- Supposed causes 177
- The following ct input with the compressor running continues for 2 seconds cooling above 11a heating above 13a 177
- Troubleshooting 177
- Troubleshooting for outdoor unit 25 35 class si21 205a 177
- Four way valve abnormality 178
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 179
- Check no 1 refer to p 92 179
- Check no refer to p 88 179
- Check no refer to p 89 179
- Troubleshooting 179
- Troubleshooting for outdoor unit 25 35 class si21 205a 179
- Discharge pipe temperature control 180
- A compressor startup failure is detected by checking the compressor running condition through the position detection circuit 181
- Check no 3 refer to p 93 181
- Clearing condition continuous run for about 5 minutes normal 181
- Compressor itself defective 181
- Input voltage out of specification 181
- Malfunction decision conditions 181
- Method of malfunction detection 181
- Outdoor unit pcb defective 181
- Position sensor abnormality 181
- Remote controller display 181
- Stop valve closed 181
- Supposed causes 181
- The compressor fails to start in about 15 seconds after the compressor run command signal is sent 181
- The system will be shut down if the error occurs 16 times 181
- Troubleshooting 181
- Troubleshooting for outdoor unit 25 35 class si21 205a 181
- Ct or related abnormality 182
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 183
- Check no 2 refer to p 93 183
- Troubleshooting 183
- Troubleshooting for outdoor unit 25 35 class si21 205a 183
- P4 j3 j6 h9 184
- Thermistor or related abnormality outdoor unit 184
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 185
- Check no refer to p 89 185
- P4 radiation fin thermistor j3 discharge pipe thermistor j6 outdoor heat exchanger thermistor h9 outdoor air thermistor 185
- Troubleshooting 185
- Troubleshooting for outdoor unit 25 35 class si21 205a 185
- Electrical box temperature rise 186
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 187
- Check no refer to p 89 187
- Check no refer to p 90 187
- Check no refer to p 91 187
- Troubleshooting 187
- Troubleshooting for outdoor unit 25 35 class si21 205a 187
- Radiation fin temperature rise 188
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 189
- Check no refer to p 89 189
- Check no refer to p 90 189
- Check no refer to p 91 189
- Troubleshooting 189
- Troubleshooting for outdoor unit 25 35 class si21 205a 189
- Output over current detection 190
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 191
- Check no 3 refer to p 93 191
- Check no refer to p 90 191
- Note if the model doesn t have spm replace the outdoor unit pcb 191
- Troubleshooting 191
- Troubleshooting for outdoor unit 25 35 class si21 205a 191
- Insufficient gas 192
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 193
- Check no refer to p 87 193
- Check no refer to p 89 193
- Troubleshooting 193
- Troubleshooting for outdoor unit 25 35 class si21 205a 193
- An abnormal voltage rise is detected by checking the specified over voltage detection circuit 194
- An over voltage signal is fed from the over voltage detection circuit to the microcomputer the voltage is over 400v 194
- Clearing condition continuous run for about 60 minutes normal 194
- Malfunction decision conditions 194
- Method of malfunction detection 194
- Note if the model doesn t have spm replace the outdoor unit pcb 194
- Over voltage detection 194
- Over voltage detection circuit defective 194
- Pam control part s defective 194
- Remote controller display 194
- Si21 205a troubleshooting for outdoor unit 25 35 class 194
- Supply voltage not as specified 194
- Supposed causes 194
- The system will be shut down if the error occurs 5 times 194
- Troubleshooting 194
- Troubleshooting 183 194
- High pressure control in cooling 195
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 196
- Check no refer to p 87 196
- Check no refer to p 89 196
- Check no refer to p 90 196
- Check no refer to p 91 196
- Si21 205a troubleshooting for outdoor unit 25 35 class 196
- Troubleshooting 196
- Troubleshooting 185 196
- Check no 1 1 check connector connection 2 check motor power supply voltage output pins 4 7 and 4 8 3 check motor control voltage pins 4 3 4 check rotation command voltage output pins 4 2 5 check rotation pulse input pins 4 1 197
- Check no 2 1 check connector connection 2 check motor control voltage output pins 2 1 197
- Checks for outdoor unit 25 35 class 197
- Fan motor connector output check 197
- Troubleshooting 197
- Troubleshooting for outdoor unit 25 35 class si21 205a 197
- Electronic expansion valve check 198
- Check no 199
- Four way valve performance check 199
- Troubleshooting 199
- Troubleshooting for outdoor unit 25 35 class si21 205a 199
- Check no remove the connectors of the thermistors on the pcb and measure the resistance of each thermistor using tester the relationship between normal temperature and resistance is shown in the graph and the table below 200
- Thermistor resistance check 200
- Check no 201
- Discharge pressure check 201
- Installation condition check 201
- Troubleshooting 201
- Troubleshooting for outdoor unit 25 35 class si21 205a 201
- Check no 202
- Outdoor unit fan system check with ac motor 202
- Si21 205a troubleshooting for outdoor unit 25 35 class 202
- Troubleshooting 191 202
- Check no 0 measure the power supply waveform between pins 1 and 3 on the terminal board and check the waveform disturbance 203
- Check no 1 203
- Check to see if the power supply waveform is a sine wave fig 203
- Check to see if there is waveform disturbance near the zero cross sections circled in fig 203
- Fig fig 203
- Inverter units refrigerant system check 203
- Power supply waveforms check 203
- Troubleshooting 203
- Troubleshooting for outdoor unit 25 35 class si21 205a 203
- Before measuring operate the unit for several minutes then shut down the operation by force using the circuit breaker 204
- Capacitor voltage check 204
- Check no 3 204
- Disconnect the compressor harness connector from the outdoor unit pcb to disengage the connector press the protrusion on the connector then follow the procedure below to measure resistance between power transistor and and the u v and w terminals of the compressor connector with a multi tester evaluate the measurement results for a pass fail judgment 204
- If the unit is shut down using the remote controller instead of the circuit breaker the capacitor discharges the electric load thus disallowing accurate measurement 204
- Note check to make sure that the voltage between the terminal of power transistor and is approx 0 volt before checking power transistor 204
- Note the charge section is applied with high voltage therefore exercise caution during measurement to prevent electric shock 204
- Power transistor check 204
- Since capacitor and are connected to power transistor and capacitor voltage can be measured at the power transistor and terminals 204
- Take measurements at the power transistor and terminals in the same way as described in section 1 set the multi tester to dc and voltage range before measurement 204
- Hall ic check 205
- A compressor overload is detected through compressor ol 206
- Check no 1 refer to p 25 206
- Check no refer to p 20 206
- Check no refer to p 21 206
- Check no refer to p 22 206
- Electronic expansion valve defective 206
- Four way valve malfunctioning 206
- If the compressor ol is activated twice the system will be shut down 206
- Malfunction decision conditions 206
- Method of malfunction detection 206
- Ol activation compressor overload 206
- Outdoor unit pcb defective 206
- Refrigerant shortage 206
- Remote controller display 206
- Stop valve defective 206
- Supposed causes 206
- The error counter will reset itself if this or any other error does not occur during the following 60 minute compressor running time total time 206
- The operating temperature condition is not specified 206
- Troubleshooting 206
- Troubleshooting for outdoor unit 50 60 class 206
- Water mixed in the local piping 206
- A compressor lock is detected by checking the compressor running condition through the position detection circuit 207
- Clearing condition continuous run for about 5 minutes normal 207
- Compressor lock 207
- Compressor locked 207
- Malfunction decision conditions 207
- Method of malfunction detection 207
- Remote controller display 207
- Seconds after the compressor has started the position detection circuit detects a compressor frequency of above 180 hz 207
- Supposed causes 207
- The position detection circuit detects a compressor frequency of below 10 hz for 20 seconds or a frequency of above 160 hz 207
- The system will be shut down if the error occurs 16 times 207
- Troubleshooting 207
- Troubleshooting for outdoor unit 50 60 class si21 205a 207
- Dc fan lock 208
- Input over current detection 209
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 210
- Check no 4 refer to p 27 210
- Check no refer to p 23 210
- Check no refer to p 24 210
- Si21 205a troubleshooting for outdoor unit 50 60 class 210
- Troubleshooting 210
- Troubleshooting 199 210
- Four way valve abnormality 211
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 212
- Check no 1 refer to p 25 212
- Check no refer to p 21 212
- Check no refer to p 22 212
- Si21 205a troubleshooting for outdoor unit 50 60 class 212
- Troubleshooting 212
- Troubleshooting 201 212
- Discharge pipe temperature control 213
- A compressor startup failure is detected by checking the compressor running condition through the position detection circuit 214
- Check no 3 refer to p 26 214
- Clearing condition continuous run for about 5 minutes normal 214
- Compressor itself defective 214
- Compressor relay cable disconnected 214
- Input voltage out of specification 214
- Malfunction decision conditions 214
- Method of malfunction detection 214
- Outdoor unit pcb defective 214
- Position sensor abnormality 214
- Remote controller display 214
- Si21 205a troubleshooting for outdoor unit 50 60 class 214
- Stop valve closed 214
- Supposed causes 214
- The compressor fails to start in about 15 seconds after the compressor run command signal is sent 214
- The system will be shut down if the error occurs 16 times 214
- Troubleshooting 214
- Troubleshooting 203 214
- Ct or related abnormality 215
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 216
- Check no 2 refer to p 26 216
- Si21 205a troubleshooting for outdoor unit 50 60 class 216
- Troubleshooting 216
- Troubleshooting 205 216
- P4 j3 j6 h9 217
- Thermistor or related abnormality outdoor unit 217
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 218
- Check no refer to p 22 218
- P4 radiation fin thermistor j3 discharge pipe thermistor j6 outdoor heat exchanger thermistor h9 outdoor air thermistor 218
- Si21 205a troubleshooting for outdoor unit 50 60 class 218
- Troubleshooting 218
- Troubleshooting 207 218
- E lectrical box temperature rise 219
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 220
- Check no refer to p 22 220
- Check no refer to p 23 220
- Check no refer to p 24 220
- Si21 205a troubleshooting for outdoor unit 50 60 class 220
- Troubleshooting 220
- Troubleshooting 209 220
- Radiation fin temperature rise 221
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 222
- Check no refer to p 22 222
- Check no refer to p 23 222
- Check no refer to p 24 222
- Si21 205a troubleshooting for outdoor unit 50 60 class 222
- Troubleshooting 222
- Troubleshooting 211 222
- Output over current detection 223
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 224
- Check no 3 refer to p 26 224
- Check no refer to p 23 224
- Check no refer to p 24 224
- Si21 205a troubleshooting for outdoor unit 50 60 class 224
- Troubleshooting 224
- Troubleshooting 213 224
- Insufficient gas 225
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 226
- Check no refer to p 20 226
- Check no refer to p 22 226
- Si21 205a troubleshooting for outdoor unit 50 60 class 226
- Troubleshooting 226
- Troubleshooting 215 226
- An abnormal voltage rise or drop is detected by checking the detection circuit or dc voltage detection circuit 227
- An over voltage signal is fed from the over voltage detection circuit to the microcomputer or the voltage being detected by the dc voltage detection circuit is judged to be below 150 v for 0 second 227
- Clearing condition continuous run for about 60 minutes normal 227
- Low voltage detection 227
- Malfunction decision conditions 227
- Method of malfunction detection 227
- Over voltage detector or dc voltage detection circuit defective 227
- Pam control part s defective 227
- Remote controller display 227
- Supply voltage not as specified 227
- Supposed causes 227
- The system will be shut down if the error occurs 16 times 227
- Troubleshooting 227
- Troubleshooting for outdoor unit 50 60 class si21 205a 227
- High pressure control in cooling 228
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 229
- Check no refer to p 20 229
- Check no refer to p 22 229
- Check no refer to p 23 229
- Check no refer to p 24 229
- Troubleshooting 229
- Troubleshooting for outdoor unit 50 60 class si21 205a 229
- Check no 1 1 check connector connection 2 check motor power supply voltage output pins 4 7 and 4 8 3 check motor control voltage pins 4 3 4 check rotation command voltage output pins 4 2 5 check rotation pulse input pins 4 1 230
- Check no 2 1 check connector connection 2 check motor control voltage output pins 2 1 230
- Checks for outdoor unit 50 60 class 230
- Fan motor connector output check 230
- Si21 205a troubleshooting for outdoor unit 50 60 class 230
- Troubleshooting 219 230
- Electronic expansion valve check 231
- Check no 232
- Four way valve performance check 232
- Si21 205a troubleshooting for outdoor unit 50 60 class 232
- Troubleshooting 221 232
- Check no remove the connectors of the thermistors on the pcb and measure the resistance of each thermistor using tester the relationship between normal temperature and resistance is shown in the graph and the table below 233
- Thermistor resistance check 233
- Check no 234
- Installation condition check 234
- Si21 205a troubleshooting for outdoor unit 50 60 class 234
- Troubleshooting 223 234
- Check no 235
- Discharge pressure check 235
- Outdoor unit fan system check with dc motor 235
- Troubleshooting 235
- Troubleshooting for outdoor unit 50 60 class si21 205a 235
- Check no 0 measure the power supply waveform between pins 1 and 3 on the terminal board and check the waveform disturbance 236
- Check no 1 236
- Check to see if the power supply waveform is a sine wave fig 236
- Check to see if there is waveform disturbance near the zero cross sections circled in fig 236
- Fig fig 236
- Inverter units refrigerant system check 236
- Power supply waveforms check 236
- Si21 205a troubleshooting for outdoor unit 50 60 class 236
- Troubleshooting 225 236
- Capacitor voltage check 237
- Check no 2 before this checking be sure to check the main circuit for short circuit 237
- Check no 3 237
- Checking the capacitor voltage 237
- Checking the power transistor 237
- For the uvw make measurements at the faston terminal on the board or the relay connector 237
- If unavoidably necessary to touch a live part make sure the power transistor s supply voltage is below 50 v using the tester 237
- Never touch any live parts for at least 10 minutes after turning off the circuit breaker 237
- Power transistor check 237
- With the circuit breaker still on measure the voltage according to the drawing of the model in question be careful never to touch any live parts 237
- Main circuit electrolytic capacitor check 238
- Turning speed pulse input on the outdoor unit pcb check 238
- Ffq25 35 50 60bv1b 30 240
- Fhq35 50 60buv1b 55 240
- Outdoor unit 25 35 class 64 240
- Outdoor unit 50 60 class 86 240
- Part 9 part 9 part 9 part 9 removal procedure removal procedure removal procedure removal procedure 240
- Part 9 removal procedure 240
- Ffq25 35 50 60bv1b 241
- Removal of suction grille 241
- Removal of air filter 242
- Removal of decoration panel 243
- Turn the provisional hanger to disengage it from the hook of switch box and slide the decoration panel in the arrow direction to remove the panel 244
- Removal of horizontal vane 245
- Remove the horizontal vane 246
- Removal of swing motor 247
- Removal of switch box 248
- Removal of fan rotor and fan motor 249
- Disconnect the harness connector for motor from the motor 250
- Pull down the fan motor slowly 250
- Remove the three washer faced bolts 250
- Removing the fan motor 250
- Removal of drain pan 251
- Removal of drain pump 252
- Installation of drain pump 253
- Insert the float switch ass y at this time put the lead wires in the wiring groove properly 254
- Install the drain pump together with the float switch with scre 254
- Procedure points 254
- Removal procedure 243 254
- Si21 205a ffq25 35 50 60bv1b 254
- Replacement of heat exchanger thermistor 255
- Replacement of heat exchanger 257
- Replacement of pc board 261
- Installing the pc board and re wiring inside the switch box 262
- Replacement of receiver section of wireless remote controller 264
- Fhq35 50 60buv1b 266
- Removal of air filter and suction grille 266
- Removal of electrical parts and pc boards 267
- Disconnect the connector mounted on the pc board 268
- Remove the pc board installation screw 268
- Slide the pc board to the left away from the tabs on the right and remove the pc board 268
- Removal of horizontal blade 269
- Removal of fan rotor and fan motor 270
- Removal of fan bearing 272
- Removal of bottom panel and drain pan 273
- Removal of swing motor 274
- Outdoor unit 25 35 class 275
- Removal of external casing 275
- Removal of bellmouth 277
- Removal of pcb and electrical box 278
- Disconnect the three wires from the pcb 280
- The pcb has eight hooks 280
- Undo the eight hooks and the pcb can be disengaged 280
- Slide the mid upward and release 283
- Removal of propeller fan and fan motor 284
- Remove the fan motor 285
- Removal of compressor noise absorption pad 286
- Procedure warning be sure to wait 10 minutes or more after turning off all power supplies before disassembling wor 288
- Pull the partition plate upward to remove 288
- Removal of partition plate and reactor 288
- Remove the two screws fixing the partition plate 288
- Slide the reactor assembly this side and release 290
- Removal of four way valve and motor valve 291
- Removal of compressor 294
- Remove the four way valve and the motor valve also so as not to be burnt out 295
- Remove the nut by an open end wrench 295
- The mounting nut for the compressor is only one piece 295
- Outdoor unit 50 60 class 297
- Removal of the panels and plates 297
- Removal of the fan motor propeller fan 301
- Pull the fan motor out 304
- Put the lead wire through the back of the motor when reassembling so as not to be entangled with the propeller fan 304
- Removal of the pcb electrical box 305
- Disconnect the reactor harness 310
- Disconnect the relaying wire connector for the compressor 310
- Release the clamp by pliers 310
- Loosen the screw of the electrical box 311
- Pull the clamp and draw the thermistor harness out from the back of the electrical box 311
- Lift the electrical box and remove it 312
- Release the clamp of the four way valve harness 312
- Removal of the reactor 313
- Lift the partition plate and remove it 314
- Loosen the screw slide the reactor and remove it from the partition plate 314
- Removal of the sound blanket 315
- Removal of the four way valve 317
- Removal of the electronic expansion valve 318
- Removal of the compressor 319
- Interchangeability 21 322
- Part 10 322
- Part 10 part 10 part 10 part 10 appendix appendix appendix appendix 322
- Piping diagrams 12 322
- Wiring diagrams 17 322
- Appendix 323
- Ffq 25 35 50 60 bv1b 323
- Fhq 35 50 60 buv1b 323
- Indoor units 323
- Piping diagrams 323
- Piping diagrams si21 205a 323
- Appendix 313 324
- Outdoor units 25 35 class 324
- Rks25bvmb 324
- Rks35bvmb 324
- Si21 205a piping diagrams 324
- Appendix 325
- Piping diagrams si21 205a 325
- Rxs25bvmb 325
- Rxs35bvmb 325
- Appendix 315 326
- Outdoor units 50 60 class 326
- Rks50bvma rks50bvmb rs50bvmb 326
- Rks60bvma rks60bvmb rs60bvmb 326
- Si21 205a piping diagrams 326
- Appendix 327
- Outdoor unit 327
- Piping diagrams si21 205a 327
- Rxs50bvma rxs50bvmb 327
- Rxs60bvma rxs60bvmb 327
- Appendix 317 328
- Ffq 25 35 50 60 bv1b 328
- Indoor units 328
- Si21 205a wiring diagrams 328
- Wiring diagrams 328
- Appendix 329
- Fhq 35 50 60 buv1b 329
- Wiring diagrams si21 205a 329
- Appendix 319 330
- Outdoor units 25 35 class 330
- Rks25bvmb rks35bvmb 330
- Rxs25bvmb rxs35bvmb 330
- Si21 205a wiring diagrams 330
- Appendix 331
- Outdoor units 50 60 class 331
- Rks 50 60 bvma rks 50 60 bvmb rs 50 60 bvmb 331
- Rxs 50 60 bvma rxs 50 60 bvmb 331
- Wiring diagrams si21 205a 331
- Appendix 321 332
- Cannot connect 332
- For further information about the practical combination by capacity refer to the combination capacity tables 332
- Interchangeability 332
- Need to register for the reguration adopting country 332
- Official combination 332
- Possible to connect 332
- Si21 205a interchangeability 332
- Appendix 333
- Cannot connect 333
- For further information about the practical combination by capacity refer to the combination capacity tables 333
- Interchangeability si21 205a 333
- Need to register for the reguration adopting country 333
- Note the b series outdoor units can be connected with the indoor units of the skyair models note that the spare parts of the pcb for a series outdoor units cannot control the skyair models 333
- Official combination 333
- Possible to connect 333
- Index index index index 334
- Numerics 334
- Drawings flow charts 338
- Drawings flow charts drawings flow charts drawings flow charts drawings flow charts 338
- L for further improvement specifications or designs are subject to change without prior notice 340
- Printed in singapore 01 2004 ak cos 340
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