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Daikin LRMEQ6AY1E [151/156] Trouble case with present machine r 407c
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Appendix (Supplementary Information) SiENBE28-901
150 Air Cooled Refrigeration Condensing Unit
7.3 Trouble Case with Present Machine (R-407C)
Compressor damage due to the overcharge of refrigerant in the field
Cause
By mistake, a local installer added 1.3 times of the total refrigerant, not 1.3 times of the
additional charging refrigerant which is specified in the Installation Manual.
(It is already explained in the service news #MJ-08023. See the next page for more details.)
Prevention of new models
New models have improved compressor reliability by countermeasure control functions of
current models. Also, the amount of the additional charging refrigerant at the field specified
up to 0.1 times only.
Request for the indication of additional refrigerant charging amount and installation date
*Be sure to fill the blanks, which are needed for after-sale services.
Please calculate the amount of additional refrigerant charging as following method.
(1)By piping length of system
Please calculate from the total length of the liquid pipes. Calculate the total piping length of each size as follows.
(2)By connecting showcase
Please calculate from the capacity of the connected showcase as below tables.
(3)Constant
Add constant amount by outdoor unit model
Full of
liquid
A few
bubbles
flow.
Sealed state ({) Shortage of refrigerant (5)
Bubbles
come out at
all times.
(A)
(B)
Manufacture's label
value
(A)+(B)
Total additional
charging amount
kg
Charging amount
(Factory set)
kg
Total amount of
refrigerant
kg
Total length of
φ15.9 liquid pipes
+
Total length of
φ12.7 liquid pipes
–
Total length of
φ9.5 liquid pipes
–
Charging amount
by piping length
(m)×0.19 (m)×0.12 (m)×0.06 (1) kg
Capacity of showcase
(*Note.)
Amount of refrigerant
Showcase
Blower
coil
MT LT
less than 5kW 1.1kg 1.4kg 0.6kg
From 5kW to less than 10kW
2.3kg 3.2kg 1.2kg
From 10kW to less than 15kW
3.4kg 5.2kg 1.7kg
From 15kW to less than 20kW
4.6kg 2.3kg
From 20kW to less than 25kW
5.9kg 3.0kg
From 25kW to less than 30kW
7.0kg 3.5kg
From 30kW to less than 35kW
8.2kg 4.1kg
From 35kW to less than 40kW
9.7kg 4.9kg
40kW or more
11.0kg
5.5kg
Capacity of
showcase
kW
+
Capacity of
blower coil
kW
–
Charging amount
by connecting
showcase
Amount of
refrigerant
kg
Amount of
refrigerant
kg
(2) kg
Constant
(3) kg
Charging amount
by adjustment
(4) kg
Outdoor unit
Amount of
refrigerant
LRLEQ5, 6AY1•LRMEQ5, 6AY1
1.0kg
LRLEQ8~12AY1•LRMEQ8~12AY1
3.0kg
LRLEQ15~20AY1•LRMEQ15~20AY1
3.5kg
*Note)
1. Case of showcase the
condition of capacity
(evaporating
temperature)
MT (Medium
temperature):
–10°C
LT (Low temperature):
–35°C
2. Case of blower coil, the
condition of capacity is
10°C (Td).
(1)+(2)+
(3)+(4)
(4)By adjustment
(When the liquid eye shows shortage of
refrigerant.)
When test running, add refrigerant if the
liquid eye not be in sealing states at
cooling operation.
(4)By adjustment ≤ (2)By connecting showcase × 0.1
Do not be over 10% of (2) amount by connecting showcase.
3P251593-1A
Содержание
- Air cooled refrigeration condensing unit 1
- Manual 1
- Service 1
- Air cooled refrigeration condensing unit 2
- Air cooled refrigeration condensing unit 1 1 lrmeq5ay1 6ay1 8ay1 10ay1 12ay1 15ay1 20ay1 1 lrleq5ay1 6ay1 8ay1 10ay1 12ay1 15ay1 20ay1 1 1 introduction 2 standard specification 2
- Appendix supplementary information 49 2
- Description of functions and operation 0 2
- Field settings 0 2
- Lrmeq5ay1 6ay1 8ay1 10ay1 12ay1 15ay1 20ay1 lrleq5ay1 6ay1 8ay1 10ay1 12ay1 15ay1 20ay1 2
- Test operation 7 2
- Troubleshooting 3 2
- 1 to overhaul the equipment be sure to turn off all power supplies 3
- 2 if a refrigerant gas belches during work do not touch the refrigerant gas 3
- 3 to remove a welded part from the suction or discharge pipe of compressor remove it in a well ventilated area after thoroughly discharging a refrigerant gas 3
- 4 if a refrigerant gas leaks during work ventilate the working area 3
- 5 the electrical parts of outdoor unit carry a high voltage to repair these parts thoroughly discharge electricity from the capacitor 3
- Introduction 3
- Safety precautions 3
- Warning 3
- Caution 4
- Warning 4
- 16 conduct electrical works according to information in the electrical equipment technical standards internal wiring regulations and installation manual and further be sure to use dedicated circuits insufficient capacity of the power supply circuit and faulty electrical works will result in an electric shock or a fire 5
- 17 to make wirings between indoor and outdoor units use specified wires to securely connect them and fix them so that the external force of cables will not be transmitted to terminal connections 5
- 18 to make wirings between indoor and outdoor units or for power supply form wires so that structures such as the service lid will not be lifted and properly mount the lid 5
- 19 do not cause damage to or process the power supply cord 5
- 20 do not cause anything other than the specified refrigerant e g air to get mixed in the refrigerant system 5
- 21 should the equipment have leakage of refrigerant gas locate leaking points and then repair them without fail subsequently refill the equipment with a specified quantity of refrigerant 5
- 22 a ground leakage circuit breaker needs to be mounted 5
- 23 do not install the equipment in places with the potential for leakage of flammable gas 5
- Caution 5
- Warning 5
- Caution 6
- Warning 6
- Air cooled refrigeration condensing unit 7
- Lr m e q 5 a y1 7
- Nomenclature 7
- Outdoor unit 7
- Air cooled refrigeration condensing unit 7 8
- Sienbe28 901 standard specification 8
- Standard specification 8
- Air cooled refrigeration condensing unit 9
- Standard specification sienbe28 901 9
- Air cooled refrigeration condensing unit 9 10
- Sienbe28 901 standard specification 10
- Air cooled refrigeration condensing unit 11
- Standard specification sienbe28 901 11
- Air cooled refrigeration condensing unit 11 12
- Sienbe28 901 standard specification 12
- Air cooled refrigeration condensing unit 13
- Standard specification sienbe28 901 13
- Air cooled refrigeration condensing unit 13 14
- Set values for functional components and protection devices 14
- Sienbe28 901 standard specification 14
- Do not select the model in the range for pull down operation to be more than 3 c hour that the temperature of indoor unit drops do not open the door and do not enter the goods in pull down operation as much as 15
- Lrleq5 6 8 10 12 15 20ay1 e 15
- Lrmeq5 6 8 10 12 15 20ay1 e 15
- Notes 1 range for continuous operation shows possible range of continuous operation 2 range for pull down operation shows possible range of short time operation 15
- Operation limits 15
- Air cooled refrigeration condensing unit 15 16
- D059917c 16
- L1 l2 l3 n 16
- Lrleq5a 6ay1 e lrmeq5a 6ay1 e 16
- Power supply 16
- Sienbe28 901 standard specification 16
- Wiring diagram 16
- Air cooled refrigeration condensing unit 17
- D059918c 17
- Lrleq8a 10a 12ay1 e lrmeq8a 10a 12ay1 e 17
- Power supply 17
- Standard specification sienbe28 901 17
- Y1 380 415v 3n 50hz 17
- Air cooled refrigeration condensing unit 17 18
- D063035b 18
- Lrleq15a 20ay1 e lrmeq15a 20ay1 e 18
- Power supply 18
- Sienbe28 901 standard specification 18
- Y1 380 415v 3n 50hz 18
- Air cooled refrigeration condensing unit 19
- Gas pipe φ 19 c1220t 19
- Liquid pipe φ 9 c1220t 19
- Lrleq5a 6ay1 e lrmeq5a 6ay1 e 19
- Piping diagram 19
- Standard specification sienbe28 901 19
- Air cooled refrigeration condensing unit 19 20
- Gas pipe φ 25 c1220t 20
- Liquid pipe φ 9 c1220t 20
- Lrleq8a 10a 12ay1 e lrmeq8a 10a 12ay1 e 20
- Sienbe28 901 standard specification 20
- Air cooled refrigeration condensing unit 21
- Gas pipe φ 31 c1220t 21
- Liquid pipe φ 12 c1220t 21
- Lrleq15a 20ay1 e lrmeq15a 20ay1 e 21
- Standard specification sienbe28 901 21
- Description and layout of functional parts and piping diagram 22
- Lrmeq5 6ay1 lrleq5 6ay1 22
- Air cooled refrigeration condensing unit 23
- Gas pipe φ 19 c1220t 23
- Liquid pipe φ 9 c1220t 23
- Lrmeq5 6ay1 lrleq5 6ay1 23
- Standard specification sienbe28 901 23
- Lrmeq8 10 12ay1 lrleq8 10 12ay1 25
- Air cooled refrigeration condensing unit 25 26
- Lrmeq8 10 12ay1 lrleq8 10 12ay1 26
- Sienbe28 901 standard specification 26
- Lrmeq15 20ay1 lrleq15 20ay1 28
- Air cooled refrigeration condensing unit 29
- Lrmeq15 20ay1 lrleq15 20ay1 29
- Standard specification sienbe28 901 29
- Field setting from outdoor unit 31
- Field settings 31
- 10 c 0 7mpa 35 c 0 1mpa 0 c 0 9mpa 25 c 0 2mpa 32
- 15 c 0 7mpa 40 c 0 7mpa 10 c 0 8mpa 32
- 20 c 0 9mpa 45 c 0 3mpa 5 c 0 2mpa 20 c 0 9mpa 32
- 5 c 0 6mpa 30 c 0 6mpa 32
- Air cooled refrigeration condensing unit 31 32
- Ds1 tsd ds1 tsd lrmeq lrleq lrmeq lrleq 32
- Sienbe28 901 field settings 32
- Tsd the evaporation temperature set by the dip switches 32
- Applicable model setting method 33
- Lrleq10ay1 e set ds1 4 and ds2 4 to on 33
- Lrleq12ay1 e set ds1 4 ds2 2 and ds2 4 to on 33
- Lrleq15ay1 e set ds1 4 ds2 1 and ds2 4 to on 33
- Lrleq20ay1 e 33
- Lrleq5ay1 e set ds2 2 and ds2 4 to on 33
- Lrleq6ay1 e set ds2 1 and ds2 4 to on 33
- Lrleq8ay1 e set ds2 1 ds2 2 and ds2 4 to on 33
- Set ds1 4 ds2 1 ds2 2 and ds2 4 to on 33
- Setting at replacement by spare pcb 33
- The position of switches 33
- Applicable model setting method 34
- Lrmeq10ay1 e set ds1 4 to on 34
- Lrmeq12ay1 e set ds1 4 and ds2 2 to on 34
- Lrmeq15ay1 e set ds1 4 and ds2 1 to on 34
- Lrmeq20ay1 e set ds1 4 ds2 1 and ds2 2 to on 34
- Lrmeq5ay1 e set ds2 2 to on 34
- Lrmeq6ay1 e set ds2 1 to on 34
- Lrmeq8ay1 e set ds2 1 and ds2 2 to on 34
- Refrigerator lrmeq5 20ay1 e 34
- The position of switches 34
- 2 setting in service mode using pushbuttons on the main pcb a1p enables a variety of settings shown below 35
- A setting mode 1 h1p off initial state while in normal operation used to make setting of the method of cool heat selection this mode is displayed while in malfunction low noise control and demand control as well b setting mode 2 setting mode 3 h1p on used to make changes of operating conditions or settings of a variety of addresses mainly for service work c monitor mode h1p blink used to check the contents set in setting mode 2 35
- Air cooled refrigeration condensing unit 35
- Caution turn off the run switch of the outdoor unit in case of the setting 35
- Field settings sienbe28 901 35
- Monitor mode 35
- Procedure for changing mode 35
- Setting mode 1 initial state 35
- Setting mode 2 35
- Steps to change mode 35
- The following 4 modes are available 35
- While in each mode use the mode button to change settings as shown below 35
- H h k h h h h 36
- H l k h h h h 36
- Led display when power is on h2p blinks for the first five seconds when the power supply is turned on if the equipment is normal h2p will be turned off in five seconds h2p lights for abnormality 36
- Air cooled refrigeration condensing unit 37
- Airnet address 37
- B 1 setting mode 2 37
- Current limitation setting 37
- Field settings sienbe28 901 37
- K h h h h h h 37
- K h h h h k h 37
- K h h h h k k 37
- K h h h k h k 37
- K h h h k k h 37
- K h h h k k k 37
- K h h k h h h 37
- K h h k h h k 37
- K h h k h k k 37
- K h h k k h k 37
- K h k h h h k 37
- Night time low noise end setting it uses it for setting 2 7 and 2 11 only connected to airnet 37
- Night time low noise start setting it uses it for setting 2 7 and 2 11 only connected to airnet 37
- No display of setting items display of setting conditions setting item h1p h2p h3p h4p h5p h6p h7p 37
- Setting of external low noise operation tax1 2 and tay1 2 are set by setting 2 21 37
- Setting of external temperature of outdoor fan tap it uses it by setting 2 5 37
- Setting of high static pressure of outdoor fan 37
- Setting of limit value of outdoor fan taps 37
- Setting of night time low noise operation only connected to airnet 37
- The number in the no column represent the number of times to press the set bs2 button 37
- Δ tsn evaporation temperature correction setting during operation at night time 37
- Δ tsp fine tuning setting of evaporation temperature 37
- 10 capacity setting 38
- 21 changing the compressor steps during target oil recovery 38
- 26 setting the freezing and refrigeration 38
- 39 power supply voltage setting 38
- Air cooled refrigeration condensing unit 37 38
- B 2 setting mode 2 for service 38
- C setting mode 3 for servicing 38
- C setting mode 3 for servicing check when malfunction code pj is displayed 38
- Correction of fan revolution according to the high pressure 38
- Inv compressor forced stop 38
- Inv compressor max frequency step control 38
- K h h h k h h 38
- K h h k h k h 38
- K h h k k k h 38
- K h k h h k k 38
- K h k h k h h 38
- K h k k h k h 38
- K h k k h k k 38
- K k h h k k k 38
- K k h k h k k 38
- K k h k k h h 38
- No display of setting items display of setting conditions setting item h1p h2p h3p h4p h5p h6p h7p 38
- Oil recovery continuous operation time 38
- Setting of night time compressor frequency reduction set the start time with 2 8 set the end time with 2 9 38
- Sienbe28 901 field settings 38
- Speed change for cooling capacity reduction 38
- Std1 compressor forced stop 38
- Std2 compressor forced stop 38
- Air cooled refrigeration condensing unit 39
- Airnet address 39
- D setting method with the airnet or type iii checker 1 in case of the airnet use setting mode 2 6 airnet address use setting mode 2 16 virtual indoor unit address 39
- Field settings sienbe28 901 39
- In case of a type iii checker use setting mode 2 16 virtual indoor unit address 39
- K h h h k k h 39
- K h k h h h h 39
- No display of setting items display of setting conditions setting item h1p h2p h3p h4p h5p h6p h7p 39
- Virtual indoor unit address setting 39
- When there is 1 outdoor unit set the address to 1 when there are multiple outdoor units outdoor outdoor transmission connection contact the after sales service division 39
- Air cooled refrigeration condensing unit 39 40
- By using the setting mode 2 8 9 you can change the amount of evaporation temperature shift that is allowed during the night time evaporation temperature correction the shift amount is factory set to 1 c moreover the signal from the external contact will take precedence over the setting specified in setting mode 2 8 9 40
- Contact rating minimum applied load 12 vdc 1 ma or less 40
- Electric wire thickness 0 5 1 5 m 40
- Evaporation temperature correction at night time using an external contact 40
- Sienbe28 901 field settings 40
- The two methods can be used to increase the evaporation temperature at night time below 1 receiving the time setting from the airnet setting mode 2 8 9 2 using an external contact the following describes the wiring needed to use an external contact by a short circuit between terminals a and c on the pcb a5p in the control box the evaporation temperature can be corrected at night time for details about the wiring refer to figure 1 protect the terminals using insulation sleeves or equivalent 40
- When used in conjunction with a remote switch connect the wire to the terminal using a ring connector refer to figure 2 or connect it to terminal c refer to figure 3 the terminal connectors must be protected with insulation sleeves 40
- Wiring length max 100 m 40
- Classification of operating modes the table below lists all the operating modes available 41
- Description of functions and operation 41
- Operating mode 41
- There are 8 operating modes available this includes a mode in which the system is stopped 2 operating modes 5 6 and 7 are inv compressor abnormal operation modes if operating mode is 4 or 7 the std1 compressor may be defective if operating mode is 1 2 or 5 the std2 compressor may be defective 3 the state in which all the compressors are stopped is operating mode 0 41
- Air cooled refrigeration condensing unit 41 42
- Operation mode 1 42
- Sienbe28 901 description of functions and operation 42
- Air cooled refrigeration condensing unit 43
- Description of functions and operation sienbe28 901 43
- Air cooled refrigeration condensing unit 43 44
- Operation mode 2 44
- Sienbe28 901 description of functions and operation 44
- Air cooled refrigeration condensing unit 45
- Description of functions and operation sienbe28 901 45
- Operation mode 3 45
- Operation mode 4 45
- Air cooled refrigeration condensing unit 45 46
- Operation mode 5 defective of inv 46
- Sienbe28 901 description of functions and operation 46
- Air cooled refrigeration condensing unit 47
- Description of functions and operation sienbe28 901 47
- Operation mode 6 defective of inv 47
- Operation mode 7 defective of inv 47
- Outline of functions 48
- 1 startup control the actuators will be operated in the following sequence when the thermostat is turned on 1 the outdoor fan will start to operate for 5 seconds this is intended to measure the outdoor temperature accurately 2 at power up the operation outputs p1 p2 for low pressure conditions see the chart on the right will be turned on off this is intended to avoid possible liquid compression that is caused by the thermostatic expansion valve in the showcase being fully open during startup to prevent liquid compression the liquid solenoid valve will be cycled on and off until the thermostatic expansion valve catches up 3 the compressors will be activated 49
- 2 thermostat on off 49
- Air cooled refrigeration condensing unit 49
- Description of functions and operation sienbe28 901 49
- Detailed description of functions 49
- Lpm lpm1 obtained after an outdoor temperature correction is made lpm1 pressure equivalent to the evaporation temperature set by the dip switches tsd evaporation temperature set by the dip switches lp the pressure detected by the low pressure sensor s1npl 49
- Mt lrmeq lt lrleq 0 mpa 0 15mpa 49
- Thermostat off setting value 49
- Conversion table for using the evaporation temperature set by the dip switches to determine its pressure equivalent 50
- Compressor control 51
- Current limit control 51
- Droop control using electrical current inv 51
- Droop control using hp 51
- Droop control using inv compressor fin temperature 51
- Droop control using td 51
- High compression ratio avoidance control 51
- Normal capacity control 51
- Std compressor overcurrent protection control 51
- 3 1 compressor steps table 52
- Air cooled refrigeration condensing unit 51 52
- Sienbe28 901 description of functions and operation 52
- 4 2 fan control before startup the fan revolution will be set based on the outdoor temperature this is intended to prevent the pressure from rising too rapidly and ensure the proper differential pressure 53
- 4 3 outdoor fan residual operation reduces the high pressure to some degree when the thermostat is turned off this will minimize the amount of sluggish refrigerant that is trapped due to high pressure when the system is stopped the fan will operate continuously for either 30 seconds after the compressors are turned off or as long as the high pressure hp stays below 1 8 mpa 53
- 4 4 fan upper limit control based on the outdoor temperature the fan upper speed will be limited based on the outdoor temperature this will help reduce the operating sound 53
- 4 fan control 4 1 outdoor fan control the outdoor fan will be controlled using the high pressure as the controlled variable as shown in the flow below 53
- Fan control 53
- Fan speed down control 53
- Fan speed up control 53
- High pressure fan control 53
- Outdoor fan 53
- 4 5 outdoor fan tap table lrm l eq5ay1 54
- Lrm l eq10ay1 54
- Lrm l eq12ay1 54
- Lrm l eq15ay1 54
- Lrm l eq20ay1 54
- Lrm l eq6ay1 54
- Lrm l eq8ay1 54
- 5 2 outdoor electrical expansion valve y2e ev2 this valve will provide refrigerant gas injection flow rate control overheating protection and condensation protection initial valve opening 43pls mode 1 55pls modes other than mode 1 control flow 55
- 5 3 outdoor electronic expansion valve y3e ev3 an electronic expansion valve is installed in the intermediate injection line of the inv compressor the valve will operate in synch with the inv compressor and allow the refrigeration oil to be returned to the inv compressor s that are in operation it also creates an economizer circuit by means of gas injection in addition the valve will control the difference in discharge pipe temperatures between inv and std compressors 55
- 5 electrical expansion valve control 5 1 outdoor electrical expansion valve y1e ev1 this only applies to the japanese domestic models the valve will be activated when the reverse cycle defrost is used for the lrm l eq models a 0pls command will be used all times 55
- 6 solenoid valve control for 8 10 12 15 and 20 ay1 models a solenoid valve is installed in the intermediate injection line of the std compressor the valve will operate in synch with std compressor and allow the refrigeration oil to be returned to the std compressor s that are in operation additionally the valve will create a gas injection economizer circuit 55
- Air cooled refrigeration condensing unit 55
- Description of functions and operation sienbe28 901 55
- Intermediate sh control 55
- Inv compressor std compressor 55
- Operation of one inv compressor 55
- Outdoor ev3 control 55
- Oil return control 56
- Recover the oil by increasing the compressor frequency 56
- Refrigerant piping 58
- Test operation 58
- To piping work contractors 59
- Air cooled refrigeration condensing unit 59 60
- It is desirable that the maximum oil adhesion in the piping is 30 mg per 10 m use the following type of refrigerant piping material seamless phosphorus deoxidized copper tube c1220t o for a maximum outer diameter of 15 mm and c1220t 1 2h for a minimum outer diameter of 19 mm refrigerant piping size and wall thickness decide the size and thickness from the following table this product uses r410a the withstand pressure of o type may be insufficient if it is used for piping with a minimum diameter of 19 mm therefore be sure to use 1 2 h type with a minimum thickness of 1 mm if o type is used for piping with a minimum diameter of 19 mm a minimum thickness of 1 mm will be required in that case be sure to perform the blazing of each joint be sure to perform piping work within the range specified in the following table 60
- Make sure that the inner side and outer side of the piping used is clean and free of contaminants such as sulphur oxide dust chips oil and fat and water 60
- Selection of piping material 60
- Sienbe28 901 test operation 60
- Drier installation 61
- Operation method of shutoff valves 61
- Air cooled refrigeration condensing unit 63
- Make sure that the horizontal portion of the gas piping slants downward to the outdoor unit see the illustration above if the outdoor unit is located above make a trap on the gas pipe at 5 m intervals from outdoor unit this will ensure the smooth returning of oil in the piping slanting upward 63
- Perform piping branching with the following conditions kept in mind at the time of branching the liquid piping use a t joint or y joint and branch it horizontally this will prevent an uneven flow of refrigerant at the time of branching gas piping use a t joint and branch it so that the branched piping will be located above the main piping see the illustration below this will prevent the stay of refrigerant oil in the indoor unit not in operation use a y joint for the liquid refrigerant branch and have the piping branch horizontally 63
- Precautions for piping 63
- Test operation sienbe28 901 63
- Use a t joint for the gas refrigerant branch and connect from the top of the main piping 63
- Field wiring 64
- Power circuit safety device and cable requirements a power circuit see the following table must be provided for connection of the unit this circuit must be protected with the required safety devices i e a main switch a slow blow fuse on each phase and an earth leakage circuit breaker when using residual current operated circuit breakers be sure to use a high speed type 1 second or less 200ma rated residual operating current use copper conductors only use insulated wire for the power cord 64
- Procedure for power supply wiring 64
- Select the power supply cable type and size in accordance with relevant local and national regulations 64
- Specifications for local wiring are in compliance with iec60245 use wire type h05vv when protected pipes are used use wire type h07rn f when protected pipes are not used 64
- A and 75a per phase 65
- And en iec61000 3 1 65
- Greater than or equal to the minimum 65
- Is greater than or equal to the minimum 65
- Is less than or equal to 65
- Less than or equal to 65
- Point for attention regarding quality of the public electric power supply this equipment complies with respectively en iec61000 3 1 65
- Provided that the short circuit power 65
- Provided that the system impedance 65
- Value at the interface point between the user s supply and the public system it is the responsibility of the installer or user of the equipment to ensure by consultation with the distribution network operator if necessary that the equipment is connected only to a supply with respectively 65
- Warning alarm and operation output wiring connections connect warning alarm and operation output wiring to the x2m terminal block and clamp as indicated by the following diagram 65
- X2m wire specifications 65
- Air tight test vacuum drying 67
- Inspection and pipe insulation 67
- Thermal insulation work 68
- Checking of device and installation conditions 69
- Make sure there is no faulty power wiring or loosing of a nut 69
- Additional refrigerant charge 70
- Checks after work completion 70
- Test run 72
- Blink 1 set the operating switch to the off position to reset the power supply and then return the switch to the on position to restart the unit if the problem persists refer to the service manual 73
- Caution do not disconnect the power supply for 1 minute after setting the operating switch to on electric leak detection is performed for several seconds after the operating switch is set to on and each compressor starts operating so disconnecting the power supply during that time will result in a false detection 73
- Error diagnosis if the system cannot operate normal at the time of test run i e the h2p indicator is lit check with malfunction code on the system with the pushbutton switches on the pcb of the outdoor unit and take the following steps make checks on other malfunction codes and pushbutton switches by referring to the provided technical guide 73
- Checking points at servicing 74
- Symptoms and check points 74
- The following symptoms are not malfunctions 74
- Troubleshooting 74
- 1 procedure of emergency operation operating the main circuit breaker twice makes it possible to conduct the forced backup operation i e to prohibit the operation of compressors having a failure in insulation and only to forcedly run operable compressors 75
- Emergency operation in the case of a compressor with poor electrical insulation this only applies to a system with multiple compressors usually if a compressor stops because of a problem the system will automatically perform a backup operation i e emergency operation using other properly functioning compressors however if the source breaker trips due to poor electrical insulation of a compressor the whole system will shut down and no backup operation will be possible if this happens you need to run the other working compressors using the following procedures 75
- Guideline for right operating conditions 75
- Normal judgement the operation will be continued 75
- Operating conditions outdoor temp 32 cd b note that the values shown above may vary significantly depending on the environment in which the unit is being used 75
- Precautions 75
- Procedures 1 set the main circuit breaker of the outdoor unit to on 75
- Restarting operation will make automatic judgement on the insulation conditions of parts concerned again malfunction judgement the main circuit breaker will be set to off again 75
- Set the main circuit breaker to on again the forced backup operation will be initiated 75
- The timing to turn off the circuit breaker varies with faulty parts if the inv compressor has a failure in insulation the circuit breaker will be immediately activated however if the std compressor has a failure in insulation it may take time to activate the circuit breaker due to loads applied 75
- Air cooled refrigeration condensing unit 77
- List of malfunction codes 77
- Troubleshooting sienbe28 901 77
- Checking malfunction codes by led lamps on pcb 78
- Air cooled refrigeration condensing unit 79
- In setting modes 1 14 and on it is possible to use the led to check the error and retry details using the same steps as previously described see the next page 79
- Troubleshooting sienbe28 901 79
- Checking malfunction codes of the condensing unit 80
- Troubleshooting by ram monitor 81
- Using the ram monitor makes it possible to check the following operating data use this monitor for troubleshooting 81
- Actuator 82
- Sensor 82
- Amp fin 83
- Irregular stop 83
- Abnormal_code 84
- Ignore the number since it is not clear which number will be displayed 84
- Flow chart for troubleshooting 85
- Std compressor motor overcurrent lock 85
- Air cooled refrigeration condensing unit 85 86
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 86
- Note 1 one of the possible factors may be chattering due to rough mgs contact 2 abnormal case the current sensor value is 0 during std compressor operation the current sensor value is more than 14 5a during std compressor stop 86
- Sienbe28 901 troubleshooting 86
- Troubleshooting 86
- Applicable models 87
- Earth leakage 87
- Malfunction decision conditions 87
- Method of malfunction detection 87
- Remote controller display 87
- Supposed causes 87
- Air cooled refrigeration condensing unit 87 88
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 88
- Sienbe28 901 troubleshooting 88
- Troubleshooting 88
- Actuation of high pressure switch 89
- Applicable models 89
- Malfunction decision conditions 89
- Method of malfunction detection 89
- Remote controller display 89
- Supposed causes 89
- Air cooled refrigeration condensing unit 89 90
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 90
- Sienbe28 901 troubleshooting 90
- Troubleshooting 90
- Actuation of low pressure sensor 91
- Applicable models 91
- Malfunction decision conditions 91
- Method of malfunction detection 91
- Remote controller display 91
- Supposed causes 91
- Air cooled refrigeration condensing unit 91 92
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 92
- Sienbe28 901 troubleshooting 92
- Troubleshooting 92
- Applicable models 93
- Inverter compressor motor lock 93
- Malfunction decision conditions 93
- Method of malfunction detection 93
- Remote controller display 93
- Supposed causes 93
- Air cooled refrigeration condensing unit 93 94
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 94
- Sienbe28 901 troubleshooting 94
- Troubleshooting 94
- Applicable models 95
- Malfunction decision conditions 95
- Malfunction of outdoor unit fan motor 95
- Method of malfunction detection 95
- Remote controller display 95
- Supposed causes 95
- Air cooled refrigeration condensing unit 95 96
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 96
- Sienbe28 901 troubleshooting 96
- Troubleshooting 96
- Air cooled refrigeration condensing unit 97
- Troubleshooting 97
- Troubleshooting sienbe28 901 97
- Malfunction of electronic expansion valve coil 98
- Air cooled refrigeration condensing unit 99
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 99
- Troubleshooting 99
- Troubleshooting sienbe28 901 99
- Abnormal discharge pipe temperature 100
- Applicable models 100
- Malfunction decision conditions 100
- Method of malfunction detection 100
- Remote controller display 100
- Supposed causes 100
- Air cooled refrigeration condensing unit 101
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 101
- Troubleshooting 101
- Troubleshooting sienbe28 901 101
- Three sensor malfunction 102
- Air cooled refrigeration condensing unit 103
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 103
- Troubleshooting 103
- Troubleshooting sienbe28 901 103
- Applicable models 104
- Malfunction decision conditions 104
- Malfunction related to high pressure switch 104
- Method of malfunction detection 104
- Remote controller display 104
- Supposed causes 104
- Troubleshooting 104
- Abnormal outdoor fan motor signal 105
- Air cooled refrigeration condensing unit 105 106
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 106
- Sienbe28 901 troubleshooting 106
- Troubleshooting 106
- Applicable models 107
- Malfunction decision conditions 107
- Malfunction of outdoor air thermistor 107
- Method of malfunction detection 107
- Remote controller display 107
- Supposed causes 107
- Troubleshooting 107
- Applicable models 108
- Current sensor malfunction 108
- Malfunction decision conditions 108
- Method of malfunction detection 108
- Remote controller display 108
- Supposed causes 108
- Troubleshooting 108
- Faulty thermistor 109
- Air cooled refrigeration condensing unit 109 110
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 110
- Sienbe28 901 troubleshooting 110
- Troubleshooting 110
- Malfunction of high pressure sensor 111
- Air cooled refrigeration condensing unit 111 112
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 112
- Sienbe28 901 troubleshooting 112
- Troubleshooting 112
- Applicable models 113
- Malfunction decision conditions 113
- Malfunction of low pressure sensor 113
- Method of malfunction detection 113
- Remote controller display 113
- Supposed causes 113
- Air cooled refrigeration condensing unit 113 114
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 114
- Sienbe28 901 troubleshooting 114
- Troubleshooting 114
- Applicable models 115
- Faulty inverter pcb 115
- Malfunction decision conditions 115
- Method of malfunction detection 115
- Remote controller display 115
- Supposed causes 115
- Troubleshooting 115
- Applicable models 116
- Malfunction decision conditions 116
- Malfunction of inverter radiating fin temperature rise 116
- Method of malfunction detection 116
- Remote controller display 116
- Supposed causes 116
- Troubleshooting 116
- Applicable models 117
- Inv compressor instantaneous overcurrent 117
- Malfunction decision conditions 117
- Method of malfunction detection 117
- Remote controller display 117
- Supposed causes 117
- Air cooled refrigeration condensing unit 117 118
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 118
- Sienbe28 901 troubleshooting 118
- Troubleshooting 118
- Applicable models 119
- Inv compressor overload 119
- Malfunction decision conditions 119
- Method of malfunction detection 119
- Remote controller display 119
- Supposed causes 119
- Air cooled refrigeration condensing unit 119 120
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 120
- Sienbe28 901 troubleshooting 120
- Troubleshooting 120
- Applicable models 121
- Faulty inv compressor startup 121
- Malfunction decision conditions 121
- Method of malfunction detection 121
- Remote controller display 121
- Supposed causes 121
- Air cooled refrigeration condensing unit 121 122
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 122
- Sienbe28 901 troubleshooting 122
- Troubleshooting 122
- Malfunction of transmission between inverter pcb and main pcb 123
- Air cooled refrigeration condensing unit 123 124
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 124
- Sienbe28 901 troubleshooting 124
- Troubleshooting 124
- Applicable models 125
- Malfunction decision conditions 125
- Method of malfunction detection 125
- Power supply voltage imbalance 125
- Remote controller display 125
- Supposed causes 125
- Troubleshooting 125
- Applicable models 126
- Faulty radiation fin thermistor 126
- Malfunction decision conditions 126
- Method of malfunction detection 126
- Remote controller display 126
- Supposed causes 126
- Troubleshooting 126
- Applicable models 127
- Malfunction decision conditions 127
- Method of malfunction detection 127
- Remote controller display 127
- Reverse phase open phase 127
- Supposed causes 127
- Troubleshooting 127
- Abnormal power supply voltage 128
- Applicable models 128
- Malfunction decision conditions 128
- Method of malfunction detection 128
- Remote controller display 128
- Supposed causes 128
- Air cooled refrigeration condensing unit 129
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 129
- Troubleshooting 129
- Troubleshooting sienbe28 901 129
- Air cooled refrigeration condensing unit 129 130
- Sienbe28 901 troubleshooting 130
- Air cooled refrigeration condensing unit 131
- Check 1 check for causes of rise in high pressure 131
- Referring to the fault tree analysis fta shown below identify faulty points 131
- Troubleshooting sienbe28 901 131
- Air cooled refrigeration condensing unit 131 132
- Check 2 check for causes of drop in low pressure 132
- Referring to the fault tree analysis fta shown below identify faulty points 132
- Sienbe28 901 troubleshooting 132
- Air cooled refrigeration condensing unit 133
- Check 3 check for causes of overheat operation 133
- Referring to the fault tree analysis fta shown below identify faulty points 133
- Troubleshooting sienbe28 901 133
- Check 4 check for power transistor 134
- Air cooled refrigeration condensing unit 135
- Check 5 check for causes of wet operation 135
- Referring to the fault tree analysis fta shown below identify faulty points 135
- Troubleshooting sienbe28 901 135
- Check 6 check for refrigerant amount 136
- Check 7 vacuum drying procedure 137
- Check 8 list of malfunction codes related to inverter 138
- Check 9 temperature and resistance characteristics of thermistor 139
- Outdoor unit 139
- Air cooled refrigeration condensing unit 139 140
- Check 10 voltage characteristics of pressure sensor 140
- Sienbe28 901 troubleshooting 140
- Characteristics of refrigerant and psychrometric chart 141
- R 410a 141
- If liquid refrigerant was recovered add refrigeration oil according to the following criteria refrigeration oil brand idemitsu daphne fvc68d amount to be added volume of recovered refrigerant kg x 0 5 liter example if the volume of the refrigerant recovered is 24kg 24 x 0 5 1 liter of oil that should be added fill port liquid stop valve service port for details about adding oil see the section that describes the refrigeration oil procedure 142
- Maintenance 142
- Procedure for removal of parts from refrigerant system as the results of checking a malfunction if the malfunction results from part s used in the refrigerant system remove the part s referring to the procedure for refrigerant recovery shown below 142
- No continuous operations allowed 143
- A discharge line maintenance valve b injection line maintenance valve c liquid stop valve d gas stop valve a b c service ports 144
- After replacing the compressor check whether the dryer is wet or dry using the moisture indicator if it is wet replace the dryer 5 conduct air tight checks 6 conduct vacuuming through the service port b and the maintenance valve a and b if the oil needs to be added charge it through the service port a 7 turn on the power supply for the outdoor unit then turn on the operation switch for the outdoor unit if a remote controller switch is used enable the remote setting 8 charge the refrigerant by the same quantity as that recovered 144
- Air cooled refrigeration condensing unit 143 144
- Applicable parts compressors m1c m2c and m3c solenoid valves std1 and std2 inv electronic expansion valve four way valve high pressure switch 2 compressors 144
- No continuous operations allowed 144
- Repair or replace the applicable parts 144
- Sienbe28 901 troubleshooting 144
- Turn off the operation switch for the outdoor unit after the outdoor unit has stopped turn off the power supply for the outdoor unit 2 remove the control box 3 close the stop valves in the order a d and then b 4 recover the refrigerant in the compressor through service ports a b and maintenance valves a and b shaped region 144
- A discharge line maintenance valve b injection line maintenance valve c liquid stop valve d gas stop valve a b c service ports 145
- After replacing the compressor check whether the dryer is wet or dry using the moisture indicator if it is wet replace the dryer 5 conduct air tight checks 6 conduct vacuuming through the service port b and the maintenance valve a and b if the oil needs to be added charge it through the service port a 7 turn on the power supply for the outdoor unit then turn on the operation switch for the outdoor unit if a remote controller switch is used enable the remote setting 8 charge the refrigerant by the same quantity as that recovered 145
- Air cooled refrigeration condensing unit 145
- Applicable parts compressors m1c m2c and m3c solenoid valves std1 and std2 inv electronic expansion valve four way valve high pressure switch 3 compressors 145
- No continuous operations allowed 145
- Repair or replace the applicable parts 145
- Troubleshooting sienbe28 901 145
- Turn off the operation switch for the outdoor unit after the outdoor unit has stopped turn off the power supply for the outdoor unit 2 remove the control box 3 close the stop valves in the order a d and then b 4 recover the refrigerant in the compressor through service ports a b and maintenance valves a and b shaped region 145
- No continuous operations allowed 146
- A discharge line maintenance valve b injection line maintenance valve c liquid stop valve d gas stop valve a b c service ports 147
- After replacing parts check whether the dryer is wet or dry using the moisture indicator if it is wet replace the dryer 5 conduct air tight checks 6 conduct vacuuming through the service port c and b then charge the refrigerant according to the quantity as that recovered and then continue vacuuming 7 turn on the power supply for the outdoor unit then turn on the operation switch for the outdoor unit if a remote controller switch is used enable the remote setting 8 charge the refrigerant by the same quantity as that recovered 147
- Air cooled refrigeration condensing unit 147
- Applicable parts main electronic expansion valve injection electronic expansion valve 2 compressors 147
- No continuous operations allowed 147
- Repair or replace the applicable parts 147
- Troubleshooting sienbe28 901 147
- Turn off the operation switch for the outdoor unit after the outdoor unit has stopped turn off the power supply for the outdoor unit 2 remove the control box 3 close the stop valves in the order c and d 4 recover the refrigerant in the compressor through service ports c b shaped region 147
- A discharge line maintenance valve b injection line maintenance valve c liquid stop valve d gas stop valve a b c service ports 148
- After replacing parts check whether the dryer is wet or dry using the moisture indicator if it is wet replace the dryer 5 conduct air tight checks 6 conduct vacuuming through the service port c and b then charge the refrigerant according to the quantity as that recovered and then continue vacuuming 7 turn on the power supply for the outdoor unit then turn on the operation switch for the outdoor unit if a remote controller switch is used enable the remote setting 8 charge the refrigerant by the same quantity as that recovered 148
- Air cooled refrigeration condensing unit 147 148
- Applicable parts main electronic expansion valve injection electronic expansion valve 3 compressors 148
- No continuous operations allowed 148
- Repair or replace the applicable parts 148
- Sienbe28 901 troubleshooting 148
- Turn off the operation switch for the outdoor unit after the outdoor unit has stopped turn off the power supply for the outdoor unit 2 remove the control box 3 close the stop valves in the order c and d 4 recover the refrigerant in the compressor through service ports c b shaped region 148
- No continuous operations allowed 149
- Appendi 150
- Restriction matter of showcase 150
- Selection of expansion valve 150
- Supplementary information 150
- Air cooled refrigeration condensing unit 151
- Appendix supplementary information sienbe28 901 151
- Cause by mistake a local installer added 1 times of the total refrigerant not 1 times of the additional charging refrigerant which is specified in the installation manual it is already explained in the service news mj 08023 see the next page for more details 151
- Compressor damage due to the overcharge of refrigerant in the field 151
- Prevention of new models new models have improved compressor reliability by countermeasure control functions of current models also the amount of the additional charging refrigerant at the field specified up to 0 times only 151
- Trouble case with present machine r 407c 151
- Case example 152
- Correct 152
- Precaution for charging refrigerant 152
- Secret 152
- Upper limit of additional refrigerant charge in commissioning 152
- Air cooled refrigeration condensing unit 153
- Appendix supplementary information sienbe28 901 153
- Expect the flat type only small size type only short shank type 153
- Method of removed and replaced compressor in field 153
- Ratchet socket wrench spanner driver tool 153
- Recommended tool for removed the screw 153
- This system s compressor has gas injection pipe when you replace the compressor you must remove the piping fixture with gas injection pipe please follow the procedure replace the compressor 153
- Installation of alarm 154
- Option list 155
- Order products 155
- Naamloze vennootschap zandvoordestraat 300 b 8400 oostende belgium www daikin eu be 0412 120 336 rpr oostende 156
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