ComfortStar CARAT18-CD Service Manual
  1. Manuals
  2. Brands
  3. ComfortStar Manuals
  4. Air Conditioner
  5. CARAT18-CD
  6. Service manual

ComfortStar CARAT18-CD Service Manual

23seer diamond splits
Hide thumbs
Table of Contents

Advertisement

Quick Links

Summary and features
1
Summary and features

SERVICE MANUAL

FOR 23SEER DIAMOND SPLITS
CARAT18-CD
CARAT24-CD

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the CARAT18-CD and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for ComfortStar CARAT18-CD

Summary of Contents for ComfortStar CARAT18-CD

  • Page 1: Service Manual

    Summary and features Summary and features SERVICE MANUAL FOR 23SEER DIAMOND SPLITS CARAT18-CD CARAT24-CD...
  • Page 2 Technical specifications Technical specifications Model CARAT18-CD COOLING HEATING Function Rated Voltage 208-230V~ Frequency(Hz) 60Hz Total Capacity (W) Standard (Low~High): 5275(1820~6450) 7325(1200~7325) Total Capacity (Btu/h) Standard (Low~High): 18000(6200~22000) 25000(4100~25000) Power Input (W) Standard (Low~High): 1500(180~2650) 2700(240~2700) Rated Input (W) 2650 2700 Rated Current (A) 12.4...
  • Page 3 Model of Outdoor Unit CARAT18-CD/O Compressor Manufacturer/trademark China Resources (Shenyang) Sanyo CO.,LTD Compressor Model C-6RZ146H1A Compressor Type Twin rotary compressor L.R.A. (A) Compressor RLA(A) Compressor Power Input(W) 1640 Overload Protector 1NT11L-3979 Throttling Method Electric expand valve Starting Method Transducer starting Working Temp Range ( ℃...
  • Page 4 Model CARAT24-CD COOLING HEATING Function Rated Voltage 208-230V~ Frequency(Hz) 60Hz Total Capacity (W) Standard (Low~High): 6450(2300~7680) 8200(1750~8200) Total Capacity (Btu/h) Standard (Low~High): 22000(7800~26200) 28000(6000~28000) Power Input (W) Standard (Low~High): 1832(220~2660) 2700(260~2700) Rated Input (W) 2660 2700 Rated Current (A) 12.2 12.5 1030/800/700/600 Air Flow Volume (m...
  • Page 5 Model of Outdoor Unit CARAT24-CD/O Compressor Manufacturer/trademark China Resources (Shenyang) Sanyo CO.,LTD Compressor Model C-6RZ146H1A Compressor Type Twin rotary compressor L.R.A. (A) Compressor RLA(A) Compressor Power Input(W) 1640 Overload Protector 1NT11L-3979 Throttling Method Electric expand valve Starting Method Transducer starting Working Temp Range ( ℃...
  • Page 6 Part name Part name Air inlet Displayer Front Panel Indoor unit Wrapping Tape Wall Pipe Guide panel Filter Air outlet Wireless remote control Displayer Heating Receiver window Setting temp. Cool Power/run Outdoor unit Air in Drainage hose Air out...
  • Page 7 Outline and installation dimension Outline and installation dimension Outline and installation dimensions of indoor unit Right Tube-exit Sign Left Tube-exit Sign Unit:mm Dimension Applicable models Ceiling Left Right...
  • Page 8 Outline and installation dimensions of outdoor unit Unit:mm Dimension Applicable models Bolt Wrench...
  • Page 9 5 5 5 5 5 Electrical circuit diagram Electrical circuit diagram These circuit diagrams are subject to change without notice, please refer to the one supplied with the unit.

  • Page 10: Pcb Function Manual

    PCB function manual and operation method 6 6 6 6 6 PCB function manual and operation method PCB function manual Temperature parameters Indoor Preset temp. (Tpreset) Indoor ambient temp. (Tamb.) (15K sensor is adopted, the resistance is 15K) Indoor heat exchanger copper tube surface temp. (Ttube) (20K sensor is adopted, the reistance is 20K) Outdoor exhaust temp.
  • Page 11 2. Display state of indoor indicators (1) State of indoor display board 1. When the unit is powered on, all patterns will be displayed and then only power indicator is on. When the unit is turned on with a remote controller, the operating indicator is on and operation mode which is set currently is displayed. 2.
  • Page 12 (4) Sleep function This mode is effective only in cooling and heating modes. Proper sleep curves shall be selected for operation according to preset temperature. In cooling mode: (1) When initial temperature is set at 16-23 , an increase of 1 will be gained every hour after the sleep function is activated. After 3 is raised, the temperature will be maintained.
  • Page 13 (9) Locked Protection of PG Motor When starting up the fans, if the motor has run at a lower speed continuously for a period, for preventing automatic protection of the motor, stop running, and display the locked operation; if the machine is running at present, the code of the locked fault---H6 of double-eight digital tubes will be displayed;...
  • Page 14 (2) Dehumidifying Mode 1. Conditions and processes of dehumidifying operations: Same as the cooling mode; 2. The temperature setting range is: 16~30 ; (3) Air-supplying Mode 1. The compressor, outdoor fans and four-way valves are switched off; 2. The temperature setting range is: 16~30 . (4) Heating Mode 1.
  • Page 15 (3) During the process of operation, if low air-damper inlet temperature of Cooling outer ring high air-damper inlet , the outer fans will keep the former operation air damper; temperature of Cooling (4) Control of oil return during cooling: when the outer fans run 80s at a high speed, you should regulate it with control logic (the control which priority level is 80s higher than the air damper switch cycle) 2.
  • Page 16 1. Starting estimation: After the compressor stopped working for 180s, if T (the inner pipe frozen-preventing frequency-limited temperature temperature of hysteresis is 2 ), the machine is only allowed to start for operating, otherwise it should not be started, and should be stopped to treat according to the frozen-preventing protection: Clear the trouble under the mode of power turn-off / heating, and the protection times are not counted.
  • Page 17 7. If the Cooling overload protection power turn-off continuously occurs for six times, it should not be resumed automatically, and you should press the ON/OFF button to resume if the fault keeps on. During the process of running, if the running time of compressor exceeds the , the times of overload overload protection times zero clearing time protection power turn-off should be cleared to recount.
  • Page 18 5. Reducing frequency at high speed and power turn-off: ≤T you should adjust frequency reducing temperature at high speed during discharging Discharge Stop temperature during discharging the compressor frequency by reducing 30Hz/90s till the lower limit; After it was running 90s at the lower limit, if ≤T , you should discharge to protect machine stopping;...
  • Page 19 3. Frequency limited If T ≤T , you should limit the Limited frequency temperature of module Module frequency reducing temperature at normal speed of module frequency raising of compressor. 4. Reducing frequency at normal speed and power turn-off: ≤T , you should frequency reducing temperature at normal speed of module Module frequency reducing temperature at high speed of module...
  • Page 20 If it still can’t run automatically when the out-of-step protection for compressor happens to stop working for 6 times in succession, it needs to press ON/OFF to operate. And if the running time is more than 10 min, the power turn-off times for out-of-step protection shall be cleared and recounted.

  • Page 21: Operation Of Wireless Remote Control

    Operation of wireless remote control Note: Be sure that there are no obstructions between receiver and remote controller; Don't drop or throw the remote control; Don't let any liquid in the remote control and put the remote control directly under the sunlight or any place where is very hot. SLEEP Signal transmitter SLEEP button...

  • Page 22: Turbo Button

    Notice: This is a general use remote controller, it could be used for the air conditioners with multifunction; For some function, which the model dosen't have, if press the corresponding button on the remote controller that the unit will not receive this signal and will keep the original running status.
  • Page 23 Notice: This is a general use remote controller, it could be used for the air conditioners with multifunction; For some function, which the model dosen't have, if press the corresponding button on the remote controller that the unit will not receive this signal and will keep the original running status.
  • Page 24 Guide for operation- general operation 1. After powered on, press ON/OFF button, the unit will start to run.(Note: When it is powered off, the guide louver of main unit will close automatically.) 2. Press MODE button, select desired running mode, or press COOL or HEAT mode to enter into the corresponding operation directly.
  • Page 25 About lock Press +and - buttons simultaneously to lock or unlock the keyboard. If the remote controller is locked, the icon will be displayed on it, in which case, press any button, the mark will flicker for three times. If the keyboard is unlocked, the mark will disappear. About swing up and down 1.
  • Page 26 Displayer indicator light control of indoor unit It's a special selective buttonfor the users ,who are not accustomed to the light at sleeping. Get the displayer indicator light on: When setting the light function,the mark will display on the remote controller screen by pressing this button.
  • Page 27 Explosive view and spare parts list Explosive view and spare parts list Exploded View of Components and Parts of Indoor unit CARAT18-CD/I...
  • Page 28 Part Code Description CARAT18-CD/I 2001209804 Front Panel Assy 24212101 stay bar sub-assy 2019220804 Decorative Board 20002989 Front panel 2 11124096 Filter Sub-Assy 11400904P Electric Box Cover2 20012011 Front Case Assy 24252017 Screw Cover 2018210511 Water Tray Assy 2018407403 Water Tray...
  • Page 29 Exploded View of Components and Parts of outdoor unit CARAT18-CD/O...
  • Page 30 Part Code Description CARAT18-CD/O Rear Grill 01473049 Axial Flow Fan 10335008 Cabinet 01433047P Fan Motor 15015064 Motor Support Sub-Assy 01705020 Chassis Sub-assy 0120371401P Supporting board(condenser) 01795010 Left Side Plate 01305041P left handle 26235401 Top Cover 01255005P Condenser Assy 01113386 Rear Grill(Back)
  • Page 31 Exploded View of Components and Parts of Indoor unit CARAT24-CD/I...
  • Page 32 Part Code Des cription CARAT24-CD/I 2001214801 Front Panel As s y 242120621 Support s tick(front panel) 20122058 Dis play Cover 2 2019223201 Decorative Board 20004343 Front Panel 11124097 Filter Sub-As s y 2011400904P Electric Box Cover2 2001207001 Front Cas e As s y 24252017 Screw Cover 1051215304P...
  • Page 33 Exploded View of Components and Parts of outdoor unit CARAT24-CD/O...
  • Page 34 Part Code Description CARAT24-CD/O （ Front ） 01473050 Rear Grill 0143500401P Cabinet 电机专用螺母 垫圈 10 （ GB862.1 ） 10335005 Axial Flow Fan 06813401 Drainage Plug 01203779P Chassis Sub-assy Condenser support plate 1175045 15014034 Fan Motor 26235401 left handle 01305043P Left Side Plate 01113446 Condenser Assy 01705025...
  • Page 35 Trouble-Shooting Trouble-Shooting Note: When replacing the controller, make sure insert the wire jumper into the new controller, otherwise the unit display C5 The breaker trips at once when it Measure insulation resistance to ground to see if there is any leakage. is set to "ON".
  • Page 36 Improper set of temperature Adjust set temperature If cooling (heating) load is Check the forecasted load of cooling (heating) proper heck and fill the leakage, then The refrigerant has leakage or is vacuumize it and supplement the re- insufficient frigerant as required Leakage between the high pres- Replace the compressor sure and the low pressure in-...
  • Page 37 The indoor fan motor is burned or breaks or Replace the fan motor or the defective part. has the heat protector malfunction. The built-in heat protector of the motor breaks Replace the fan motor frequently because the motor is The fan does not abnormal.
  • Page 38 C o n t r o l l e r m a l f u n c t i o n ( I C 2 0 0 3 b r o k e n , creepage of parallel capacitor of relay loop, Change controller relay is broken etc.) In cool, heat mode,the...
  • Page 39 Indoor PC Board Note: When replacing the controller, make sure insert the wire jumper into the new controller, otherwise the unit display C5.

  • Page 40: Indoor Pcb

    Indoor PCB • Front Side Name of Interface Description neutral wir To be connected with N line of power healthy function neutral wire To be connected with N line on healthy module Fuse live wire To be connected with L line of power PGmotor power line To be connected with PG Motor Healthy function live wireTo be connected with L line of Healthy Module Jumper...
  • Page 41 • Back side VIEW Circuit Module Drive of Swing Motor PGmotor Drive Display Communication Switch Power Supply Temperature Sensor...
  • Page 42 The key testing Points(Back side) • Test1 Between two points Weak Electricity Power Supply Test2 Between two points Weak Electricity Power Supply Test3 Between two point s live wire & neutral wire 230VAC¡À10% Test4 Between two points live wire & neutral wire 230VAC¡10%...
  • Page 43 AP1 UNIT (IGBT) C2(PFC) - ~ ~ IPM MODULE C301 C303 DATA1 POWER SUPPLY C302 C304 IPM1 TVS1 230V~ 60Hz COMP SMPS FM FAN MOTOR P.C.BOARD HALL OVC-COMP T-SENSOR OUTTUBE OUTROOM EXHAUST TEM.SENSOR TEM.SENSOR TEM.SENSOR Remarks Marking Specs FUSE FUSE RV1 RV2 RV3 Piezoresistance TVS1...
  • Page 44 Front Side Name of Interface Description Interface for Compressor Three wires —COMP-U —COMP-V,Red — COMP-W Overload of Compressor Twin-Core White wire connected with overload Temperature Sensor Tube Temp( 20kΩ@25 15kΩ@25 50kΩ@25 Electronic Expansion Vavle To be connected with 5-core expansion valve Blower HALLinterface To be conencted with the sensor of DC-Motor Blower HALL Outdoor Fan blowerTo be connected with FAN-MOTOR...
  • Page 45 3 Key Testing Point Test4 Test2 Test9 Test3 Test Test5 Test7 Test6 Tset8 Test10 Test11 Test16 Test14 Test15 Test12 Test13...
  • Page 46 Test Serial Test spot Corresponding components Test value under normal circumstances Test1 Between A and C Power Supply L N 160V~265V Test2 Between B and C Power Supply L N 160V~265V Test3 Between D and E Electrolytic Capacitor for DC-Bus 180VDC~380VDC Test4 Between F and G...
  • Page 47 PCB of Outdoor Unit (Front Side) PCB of Outdoor Unit (Back Side)
  • Page 48 Malfunctions Normally,diagnose troubles according to the trouble diagnosis procedure as described below.(Refer to the check points in servicing written on the wiring diagrams attached to the indoor/outdoor units.) Troubleshooting procedure Confirmation Judgement by Flashing LED of Indoor/Outdoor Unit How to Check simply the main part NOTE: A large-capacity electrolytic capacitor is used in the outdoor unit controller(inverter).Therefore,if the power supply is turned off,charge(charging voltage DC280V to 380V)remains and discharging takes a lot of time..
  • Page 49 Key test spot Test9 Test3 Test4 Test2 Test Discharging Position: Test5 Test7 Test6 Tset8 Confirmation 1 Confirmation of Power Supply Confirm that the power breaker operates(ON) normally; (2)Confirmation of Power Voltage Confirm that power voltage is AC 220–230–240 ±10%. If power voltage is not in this range, the unit may not operate normally.
  • Page 50 □ ■ □ □ □ □ ■ □ ■ ■ □ □ ■ □ □ □ □ □ ■ □ ■ ■ □ ■ ■ ■ □ □ □ ■ □...
  • Page 51 Fan motor works. is too high Blink 11 If higher than 265VAC, Heating: all will stop times please cut off the power supply and restart until back to normal 2. If input voltage is normal, testing the voltage of electrolytic capacitor on AP1 after turn on the unit.
  • Page 52 □ ■ ■ ■ □ ■ ■ □ ■ ■ ■ ■ □ □ ■ ■ □ ■ ■ ■ □ ■ □ □ □...

  • Page 53: How To Check Simply The Main Part

    3 How to Check simply the main part (1) Capacitor charge fault (Fault with outdoor unit) (AP1 below refers to the outdoor control panel) Main Check Points: Use AC voltmeter to check if the voltage between terminal L and N on the wiring board is within 210VAC~240VAC. If the reactor (L) is correctly connected? If the connection is loose or fallen? If the reactor (L) is damaged? Fault diagnosis process: Turn on the unit...
  • Page 54 (2) IPM Protection, Out-of-step Fault, Compressor Phase Overcurrent (AP1 below refers to the outdoor control panel) Main check points: If the connection between control panel AP1 and compressor COMP is secure? If loose? If the connec- tion is 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 normal? If the insulation of compressor coil against the copper tube...
  • Page 55 Energize and switch on Use AC voltmeter If the voltage Check the supply to measure the IPM protection between terminal L voltage and voltage between occurs after the and N on wiring terminal L and N machine has run for restore it to board XT is within a period of time?
  • Page 56 3 High temperature and overload protection diagnosis (AP1 hereinafter refers to the control board of the outdoor unit) Mainly detect: ● Is outdoor ambient temperature in normal range? ● Are the outdoor and indoor fans operating normally? ● Is the heat dissipation environment inside and outside the unit is good? Overheat and high temperature protection Normal protection, please operate it after the...
  • Page 57 (4) Start-up failure (following AP1 for outdoor unit control board) Mainly detect: Whether the compressor wiring is connected correct? Is time for compressor stopping enough? Is compressor broken? Power on the unit Is stop time of the compressor Restart it up after 3 minutes longer than 3 minutes? Does startup fail? Are the wires for the compressor connected...
  • Page 58 (5) Out of step diagnosis for the compressor (AP1 hereinafter refers to the control board of the outdoor unit) Mainly detect: Whether the system pressure is too high? Whether the input voltage is too low? Out of step occurs in Out of step occurs once the operation unit is powered on.
  • Page 59 (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 Connect the wires correctly connected correctly?
  • Page 60 7 Power factor correct or (PFC) fault (a fault of outdoor unit) (AP1 hereinafter refers to the control board of the outdoor unit) Mainly detect: Check if the reactor (L) of the outdoor unit and the PFC capacitor are broken The failure diagnosis process is as follows: Start Check wiring of the...
  • Page 61 (8) Communication malfunction: (following AP1 for outdoor unit control board) Mainly detect: Detect the indoor and outdoor units connection wire and indoor and outdoor units inside wiring is connect well or not, if is there any damage? Is there any damage for the indoor unit mainboard communication circuit? Is communication circuit damaged? The flow chart for malfunction detect: Start Did the equipment operate...
  • Page 62 (9) Flow chart for outdoor communitcation circuit detecting: Start Measure voltage at the Test 10 position as shown in the diagram with a voltmeter Value jumping Measure voltage at the Test 15 position as shown in the diagram with a voltmeter Value jumping Fault with outdoor unit...
  • Page 63 Appendix 1: form for indoor/outdoor unit's ambient sensor numerical value of resistance Resistance Temp. Resistance Temp. Resistance Temp. Resistance Temp.
  • Page 64 Appendix 2: form for indoor/outdoor unit's tube temperature sensor numerical value of resistance Resistance Temp. Resistance Temp. Resistance Temp. Temp. Resistance...
  • Page 65 Appendix 3: form for indoor/outdoor unit's air exhaust temperature sensor numerical value of resistance Resistance Resistance Resistance Temp. Temp. Resistance Temp. Temp.

This manual is also suitable for:

Carat24-cd

Table of Contents