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Daikin LRMEQ8AY1 [23/156] Lrmeq5 6ay1 lrleq5 6ay1

Daikin LRMEQ5AY1 [23/156] Lrmeq5 6ay1 lrleq5 6ay1

Standard Specification SiENBE28-901

22 Air Cooled Refrigeration Condensing Unit

LRMEQ5, 6AY1

LRLEQ5, 6AY1

FILTER

DOUBLE PIPE

HEAT EXCHANGER

SERVICE PORT

CHECK VALVE

ELECTRONIC

EXPANSION

VALVE

SIGHT GLASS

ELECTRONIC

EXPANSION

VALVE

FILTER

RECEIVER

FUSIBLE

PLUG

CHECK VALVE

PRESSURE

REGULATING

VALVE

FAN

HEAT EXCHANGER

FILTER

STOP VALVE

HIGH PRESSURE

SWITCH

(DEFROST)

FOUR WAY VALVE

STOP VALVE

SERVICE PORT

GAUGE PORT

HIGH PRESSURE SENSOR

S1NPH

S4PH

CHECK VALVE

FILTER

CAPILLARY

TUBE

OIL

SEPARATOR

HIGH PRESSURE

SWITCH

S1PH

COMPRESSOR

INV

LOW PRESSURE

SENSOR

S1NPL

GAUGE PORT

SERVICE PORT

LIQUID PIPE

φ9.5 C1220T

GAS PIPE

φ19.1 C1220T

STOP VALVE (WITH SERVICE PORT φ7.9mm FLARE CONNECTION)

CHECK VALVE

(12)

(F)

(4)

(20)

(E)

(16)

(3)

(19)

(10)

(11)

(D)

(A)

(2)

(13)

(6)

(15)

(5)

(18)

(8)

(C)

(1)

(B)

(9)

(14)

(17)

(7)

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

Daikin LRMEQ8AY1 [23/156] Lrmeq5 6ay1 lrleq5 6ay1

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