ComfortStar CARAT18-CD Service Manual Download Page 59

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(6)Overload and air exhaust malfunction diagnosis (following AP1 for outdoor unit control board)

Mainly detect:

Wether the PMV is connected well or not? Is PMV damaged?

Is refrigerant leaked?

20 minutes after the

complete unit is

powered off

Is the terminal FA for the

PMV

connected correctly?

Connect the

wires correctly

Resistances between the first four pins
close to the terminal hole and the fifth
pin are almost the same, less than 100
ohm.

Replace the PMV

If the fault is eliminated?

Replace the

control panel

AP1

Coolant leakage, refilling

the coolant

End

Summary of Contents for CARAT18-CD

Page 1: ...1 Summary and features Summary and features SERVICE MANUAL FOR 23SEER DIAMOND SPLITS CARAT18 CD CARAT24 CD...

Page 2: ...r W Fuse A Sound Pressure Level dB A H M L Sound Power Level dB A H M L Dimension W H D mm Dimension of Package L W H mm Net Weight Gross Weight kg 2 CARAT18 CD 208 230V 60Hz 830 750 650 550 13 18 2 5...

Page 3: ...enser Pipe Diameter mm Rows Fin Gap mm Electric expand valve Overload Protector Throttling Method Starting Method Working Temp Range Compressor Type L R A A Compressor RLA A Compressor Power Input W O...

Page 4: ...odel Output of Swing Motor W Fuse A Sound Pressure Level dB A H M L Sound Power Level dB A H M L Dimension W H D mm Dimension of Package L W H mm Net Weight Gross Weight kg CARAT24 CD 208 230V 60Hz 10...

Page 5: ...ser Pipe Diameter mm Rows Fin Gap mm Electric expand valve Overload Protector Throttling Method Starting Method Working Temp Range Compressor Type L R A A Compressor RLA A Compressor Power Input W Out...

Page 6: ...Outdoor unit Wall Pipe Drainage hose Air in Air out Wrapping Tape Connection pipe Air inlet Front Panel Displayer Air outlet Filter Guide panel Wireless remote control Displayer Setting temp Heating C...

Page 7: ...installation dimensions of indoor unit 4 Outline and installation dimension Outline and installation dimension W D H Dimension Applicable models Unit mm Ceiling Right Tube exit Sign Left Tube exit Sig...

Page 8: ...Outline and installation dimensions of outdoor unit Bolt Wrench Nut Dimension Applicable models Unit mm...

Page 9: ...Electrical circuit diagram Electrical circuit diagram 5 5 5 5 5 These circuit diagrams are subject to change without notice please refer to the one supplied with the unit INDOOR UNIT OUTDOOR UNIT...

Page 10: ...range should be 16 30 61 86 Fahrenheit scale 2 Working condition and procedure of heating mode When unit turn on and enter into Heating mode indoor unit enter into anti cool wind mode when unit is st...

Page 11: ...tate Display Table Note in the case that the unit is switched off with the remote controller or the compressor is switched on again failure display waiting time 200s shall be cleared 4 Frequency limit...

Page 12: ...on state the system will continue to operate if timing start is set when the system is at stop as the preset time is reached the system will start to run in preset mode Timing stop if timing stop is s...

Page 13: ...ced Running Function of the Inner Units 1 Enter into Forced Running Control Within 5 minutes after power up press the Lights Off button on the remote controller continuously for three times within 3 s...

Page 14: ...temperature changes When running with force the outdoor fans shall run in the highest air flow 1 Outer fans control logic in cooling dehumidifying mode 1 If Toutdoor ambient temperature Tinlet tempera...

Page 15: ...eiving the order of power turn on or preheating it will carry out charging control at first 2 Charging stops Charging will stop if meet the two following conditions a The preheating of compressor has...

Page 16: ...pping the machine or transferring to supply air will clear the trouble times immediately if the trouble can not be resumed mode transferring will not clear it 2 Overload protection function Overload p...

Page 17: ...it was running 90s at the lower limit if T heating overload frequency reducing temperature at normal speed T outer pipe then Cooling overload protects machine stopping 4 Power turn off If the T heati...

Page 18: ...overcurrent and the compressor has been stopped for 3 minutes the machine should be allowed to operate 5 If the overcurrent protection continuously occurs for six times it should not be resumed automa...

Page 19: ...t Protection times clearing of compressor overloading 30 minutes 10 Phase current overcurrent protection of compressor During the running process of compressor you could measure the phase current of...

Page 20: ...cleared out the failure and its times immediately when turning off or delivering wind cooling dehumidifying mode conversed the inverted mode don t clear out the failure when it can t recover to operat...

Page 21: ...button for 2 seconds above in every 0 5 seconds the value on ten place ofMinutewillbeincreased1 Duringblinking repress the Clock button signalwillbe constantly displayed and itdenotesthe setting succe...

Page 22: ...n its signal will be displayed When switching the mode or changing fan speed this function will be canceled automatically Notice This is a general use remote controller it could be used for the air co...

Page 23: ...at all five positions SWING UP and DOWN BUTTON Timer On setting Signal ON will blink and display signal will conceal the numerical section will become the timer on setting status During 5 seconds blin...

Page 24: ...e not available for some units 4 Press TURBO button can realize the ON and OFF of TURBO function or timer off This function indicates that moisture on evaporator of indoor unit will be blowed after th...

Page 25: ...ontroller will display H1 If switch to heat mode the position will display H1 which flickers for 5s in which case press button H1 will disappear and setting temp be displayed After remote controller i...

Page 26: ...or light off If cancel the light function the mark will disap per on the remote controller screen by pressing this button In which case the displayer indicator light will be off if the AC receives thi...

Page 27: ...Exploded View of Components and Parts of Indoor unit 7 Explosive view and spare parts list Explosive view and spare parts list CARAT18 CD I...

Page 28: ...rainage hose 1 37 Rubber Plug Water Tray 1 38 Axile Bush 1 39 Jumper 1 40 Display Cover 2 1 41 Display Board 1 42 Shield cover of Electric Box 1 43 Ambient Temperature Sensor 1 44 Tube Sensor 1 45 Ele...

Page 29: ...Exploded View of Components and Parts of outdoor unit CARAT18 CD O...

Page 30: ...31 Wire Clamp 1 1 32 Wire Clamp 2 1 33 Insulation GasketC 1 34 Terminal Board 1 35 Terminal Board support Assy 1 36 Electric Box 1 37 Radiator 1 38 Electric expand valve fitting 1 39 Electronic Expans...

Page 31: ...Exploded View of Components and Parts of Indoor unit CARAT24 CD I...

Page 32: ...Holder 1 40 Fan Bearing 1 41 O Gasket of Cross Fan Bearing 1 42 O Gasket sub assy of Bearing 1 43 Rem ote Controller 1 44 Electric Box Assy 1 45 Display Board 1 46 Jum per 1 47 Electric Box 1 48 Tube...

Page 33: ...Exploded View of Components and Parts of outdoor unit CARAT24 CD O...

Page 34: ...lectric Box 1 35 Radiator 1 36 Electric Box Assy 1 37 Cut off Valve liquid 1 38 Electronic Expansion Valve 1 39 Electric expand valve fitting 1 40 4 way Valve Assy 1 41 Sensor Container 1 42 Magnet Co...

Page 35: ...nd the remote startup has no response The remote controller does not receive signals after it is powered the buzzer will sound unless it has malfunction The circuit or the part of the air conditioner...

Page 36: ...e thick and thin pipes is good Heat insulation must also be provided for the joint andthe exposed part of the copper pipe Block of outdoor heat ex changer Clean the dust accumulated on the surface of...

Page 37: ...pacitor of compressor Replace the capacitor The voltage is too low or too high Manostat is recommended Wrong wire connection Connect the circuit diagram correctly When cooling or heating outdoor fanru...

Page 38: ...Touch of pipeline of outdoor unit Separate the touching pipeline Touch of inner plates Louver of outdoor unit touched outer case Abnormal sound inside compressor Change compressor Adjust location of...

Page 39: ...Note When replacing the controller make sure insert the wire jumper into the new controller otherwise the unit display C5 Indoor PC Board...

Page 40: ...Front Side Indoor PCB 1 2 healthy function neutral wire 3 4 5 PG 6 7 8 To be conected with Swing Motor 9 PG 10 20k 25o C 15k 25o C 11 12...

Page 41: ...Back side VIEW 1 2 PG 3 4 5 MCU 6 7...

Page 42: ...Test1 5V Test2 Test3 Test4 The key testing Points Back side...

Page 43: ...T C 8 L1 L2 Choke loop A 5 2 H m 5 9 K1 G8P 1A4TP12VDC 30A 10 K2 OJE SS 112HMF 10A 11 K3 K4 K6 JZC 32F 012 H 5A 12 L Reactor A 4 1 H m 5 1 13 BD1 BD2 Converter 25A 600V D25XB60 14 BD3 Converter D3SBA6...

Page 44: ...HALL 6 FAN MOTOR 7 4 Way Valve To be connected with 4 way Valve YV 8 9 Power Source L line 10 Connect to Earth 11 PowerSource N line 12 1 Connect to one terminal of Inductor Whilt 13 PFC Connect to C2...

Page 45: ...3 Key Testing Point Test Test2 Test3 Test4 Test5 Test6 Test7 Tset8 Test9 GND Test10 C A B D E F G H I J K L M Test11 N O P Q R Test16 Test12 Test13 Test14 Test15 S T...

Page 46: ...t6 Capacitor C56 terminal Capacitor C56 12V 13VDC Test7 Capacitor C58 terminal C D V 5 8 5 C Test8 Capacitor C83 terminal C D V 3 3 3 8 C Test9 Capacitor C80 terminal C D V 8 1 5 1 0 8 C Test10 Betwee...

Page 47: ...PCB of Outdoor Unit Front Side PCB of Outdoor Unit Back Side...

Page 48: ...r Therefore if the power supply is turned off charge charging voltage DC280V to 380V remains and discharging takes a lot of time After turning off the power source if touching the charging section bef...

Page 49: ...EOLQN RQFH V 2II EOLQN WZLFH V 2II EOLQN IRXU WLPHV FRROLQJ GHKXPLGLI LQJ H FHSW WKH LQGRRU IDQ PRWRU LV UXQQLQJ RWKHUV ZLOO VWRS WR UXQ KHDWLQJ DOO VWRS UXQQLQJ FRROLQJ GHKXPLGLI LQJ FRPSUHVVRU RXWG...

Page 50: ...O ZRUN HDW DOO ZLOO VWRS RROLQJ GHKXPLGLI LQJ FRPSUHVVRU ZLOO VWRS LQGRRU IDQ PRWRU ZLOO ZRUN HDW DOO ZLOO VWRS RROLQJ GHKXPLGLI LQJ DIWHU UXQQLQJ IRU PLQV ODWHU WKH FRPSUHVVRU ZLOO VWRS WR UXQ LQGRRU...

Page 51: ...running Cooling dehumidifying compressor stops running indoor fan motor works Heating all will stop running Overload normal works compressor running frequency declines Cooling dehumidifying compresso...

Page 52: ...WLPHV 3RZHU YROWDJH LV QRW VWDDEOH 5HSODFH WKH RXWGRRU FRQWURO ERDUG 3 QGRRU XQLW DLU UHWXUQ LV SRRU RU IDQ VSHHG LV WRR ORZ 40 L3 DQ PRGXOH SURWHFWLRQ RROLQJ RXWGRRU IDQ PRWRU FRPSUHVVRU VWRS UXQQLQJ...

Page 53: ...lt with the voltage testing circuit on control panel AP1 Replace the control panel AP1 Measure the AC voltage between terminal L and N on wiring board XT power supply Voltage within 210VAC 250VAC Shut...

Page 54: ...in correct order If the voltage input of the machine is within normal range Use AC voltmeter to measure the voltage between terminal L and N on the wiring board XT If the compressor coil resistance is...

Page 55: ...agram Then Restart the unit Remove the wires on the two ends of capacitor C2 Then use capacitance meter to measure the capacitor C2 Verify as per the Parameters Sheet Stop the unit and disconnect the...

Page 56: ...outdoor ambient temperature higher than 53 20 minutes after the complete unit is powered off Is heat dissipation of the indoor unit and outdoor unit abnormal Normal protection please operate it after...

Page 57: ...AP1 for outdoor unit control board Power on the unit Is stop time of the compressor longer than 3 minutes Restart it up after 3 minutes Does startup fail Are the wires for the compressor connected co...

Page 58: ...nnected correctly Is connection sequence right Is the connection made in clockwise direction Connect the wires correctly Replace the control panel AP1 If the fault is eliminated Replace the compressor...

Page 59: ...inutes after the complete unit is powered off Is the terminal FA for the PMV connected correctly Connect the wires correctly Resistances between the first four pins close to the terminal hole and the...

Page 60: ...r short circuit Replace it as per the wiring diagram and reconnect the wires If the fault is eliminated Remove the PFC capacitor and measure resistance between the two terminals Is the resistance arou...

Page 61: ...rmally before the failure occurs The AP1 voltage detection circuit is at fault Check wiring inside of the indoor and outdoor units Are wires broken Check the communication circuit of the outdoor unit...

Page 62: ...ing Measure voltage at the Test 15 position as shown in the diagram with a voltmeter Value jumping Measure voltage at the Test 11 position as shown in the diagram with a voltmeter Value jumping Measur...

Page 63: ...N N N N Temp Resistance Temp Temp Resistance Temp Resistance Resistance Appendix 1 form for indoor outdoor unit s ambient sensor numerical value of resistance...

Page 64: ...N N N N Temp Resistance Temp Temp Temp Resistance Resistance Resistance Appendix 2 form for indoor outdoor unit s tube temperature sensor numerical value of resistance...

Page 65: ...N N N N Temp Resistance Temp Temp Temp Resistance Resistance Resistance Appendix 3 form for indoor outdoor unit s air exhaust temperature sensor numerical value of resistance...

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