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Summary of Contents for Carrier 42/38KCR024713
- Page 1 Cover Service Manual AIR CONDITIONER Hi-Wall Type 42/38KCR024713 42/38QCR024713...
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Page 2: Table Of Contents
Content Content Precaution 1.1 Safety Precaution 2 1.2 Warning 2 Function Dimension 3.1 Indoor unit 3.2 Outdoor unit 5 Refrigerant cycle diagram 6 Operation limits 7 5.1 Cooling operation 7 5.2 Heating operation 7 Wiring diagram Installation details 7.1 Wrench torque sheet for installation 7.2 Connecting the cables 10 7.3 Pipe length and the elevation 7.4 Air purging of the piping and indoor unit... -
Page 3: Precaution
Service manual 1. Precaution 1.1 Safety Precaution To prevent injury to the user or other people and property damage, the following instructions must be followed. Incorrect operation due to ignoring instruction will cause harm or damage. Before service unit, be sure to read this service manual at first. 1.2 Warning ... - Page 4 Service manual the unit is so equipped.) Operational There is risk of physical injury, electric shock, or product Do not expose the skin directly to cool air for long failure. When the product is soaked (flooded or periods of time.
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Page 5: Function
Service manual 2. Function Indoor unit Operation ON/OFF by remote controller Sensing by room temperature Room temperature sensor. Pipe temperature sensor. Room temperature control Maintain the room temperature in accordance with the setting temperature Starting temperature control Indoor fan is delayed for 5 sec at the starting. Room temperature control Time Delay Safety control Compressor failure... - Page 6 Service manual Outdoor unit Power relay control The unit has 3 mins delay between continuously ON/OFF operations. Low noise air flow system Bird tail propeller fan makes the outdoor unit run more quietly. Hydrophilic aluminum fin The hydrophilic fin can improve the heating efficiency at operation mode. 4 way valve control It is only operated in the heating operation mode except defrosting operation.
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Page 7: Dimension
Service manual 3. Dimension 3.1 Indoor unit Model 1030 3.2 Outdoor unit Dimension Mode... -
Page 8: Refrigerant Cycle Diagram
Service manual 4. Refrigerant cycle diagram Cooling only Heat pump mode... -
Page 9: Operation Limits
Service manual 5. Operation limits 5.1 Cooling operation Outdoor unit air temp.℃ DB Indoor air temp. ℃ DB Note: The chart is the result from the continuous operation under constant air temperature conditions. However, excludes the initial pull-down stage. 5.2 Heating operation Indoor air temp. -
Page 10: Wiring Diagram
Service manual 6. Wiring diagram Indoor： 42KCR024713 42QCR024713 Outdoor： 38KCR024713... - Page 11 Service manual 38QCR024713...
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Page 12: Installation Details
Service manual 7. Installation details Wrench torque sheet for installation Outside diameter Torque inch Kg.m φ 9.52 φ 12.7 φ 15.88 Connecting the cables The power cord of connect should be selected according to the following specifications sheet. Grade Unit Pipe length and the elevation Max. -
Page 13: Air Purging Of The Piping And Indoor Unit
Service manual Air purging of the piping and indoor unit Required tools: Hexagonal wrench; adjustable wrench; torque wrenches, wrench to hold the joints and gas leak detector. Note: The air in the indoor unit and in the piping must be purged. If air remains in the refrigeration piping, it will affect the compressor, reduce the cooling capacity, and could lead to a malfunction of unit. -
Page 14: Pumping Down (Re-Installation)
Service manual Pumping down (Re-installation) Procedure Confirm that both the 2-way and 3-way valves are set to the opened position. Remove the valve stem caps and confirm that the valve stems are in the opened position. Be sure to use a hexagonal wrench to operate the valve stems. Operate the unit for 10 to 15 minutes. -
Page 15: Re-Air Purging (Re-Installation)
Service manual Re-air purging (Re-installation) Procedure: Confirm that both the 2-way and 3-way valves are set to the closed position. Connect the charge set and a charging cylinder to the service port of the 3-way valve. Leave the valve on the charging cylinder closed. Air purging. -
Page 16: Balance Refrigerant Of The 2-Way, 3-Way Valves
Service manual Balance refrigerant of the 2-way, 3-way valves Procedure: Confirm that both the 2-way and 3-way valves are set to the open position. Connect the charge set to the 3-way valve’s service port. Leave the valve on the charge set closed. Connect the charge hose with the push pin to the service port. -
Page 17: Evacuation
Service manual Evacuation Procedure: Connect the vacuum pump to the charge set’s centre hose. Evacuation for approximately one hour. Confirm that the gauge needle has moved toward -0.1 Mpa (-76 cmHg) [vacuum of 4 mmHg or less]. Close the valve (Low side) on the charge set, turn off the vacuum pump, and confirm that the gauge needle does not move (approximately 5 minutes after turning off the vacuum pump). -
Page 18: Gas Charging
Service manual Gas charging Procedure: 1. Connect the charge hose to the charging cylinder. Connect the charge hose which you disconnected from the vacuum pump to the valve at the bottom of the cylinder. 2. Purge the air from the charge hose. ... -
Page 19: Electronic Function
Service manual 8. Electronic function 8.1 Electronic control working environment Input voltage: 175~253V Input power frequency: 60Hz Ambient temperature: -7C~45C Indoor fan normal working amp is less than 1A Outdoor fan normal working amp is less than 1.5A Four-way valve normal working amp is less than 1A Swing motor: DC12V Compressor: single-phase power supply. - Page 20 Service manual 8.4 Protection 8.4.1 3 minutes delay at restart for compressor. 8.4.2 Sensor protection at open circuit and breaking disconnection 8.4.3 Fan Speed is out of control. When Indoor Fan Speed is too high(higher than High Fan+300RPM)or too low(lower than 400RPM), the unit stops and LED displays failure information and can’t returns to normal operation automatically.
- Page 21 Service manual Auto fan at cooling mode: High fan Mid. fan Room temp. down Room temp. up Low fan T-Ts Anti-freezing control to indoor evaporator at cooling mode ( T: evaporator temp. ) Compressor and outdoor fan on EVAP. temp. down EVAP.
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Page 22: Te2
Service manual defrosting mode or the end of defrost. 8.8.3 Action of compressor and outdoor fan motor at heating mode: compressor must run for 7 minutes after starting and then judge temperature. Meanwhile other protections are still valid. Compressor and outdoor fan off Room temp. -
Page 23: Te8
Service manual Compressor off Fan off Compressor on Fan off T temp. down T temp. up Compressor on Fan on The louver opens to Standard Angle ANGLHEAT when power is on for the first time 8.9 Defrosting mode(available for heating mode) 8.9.1 Defrosting condition: Defrost starts when either of the following: The compressor works under the condition that T3 lower than 0’C add up to more than 40 minutes, and under... - Page 24 Service manual Heating (fan only at cooling) Fan only Cooling TA-TS 8.10.2 The indoor fan blows automatically in corresponding selected mode； 8.10.3 The motion of indoor fan’s blade should accord with the selected operation mode； 8.10.4 One mode should be carried out for at least 15 minutes once selected. If the compressor cannot start for 15 minutes, reselect the operation mode according to the room temp.
- Page 25 Service manual The set temperature decrease 1℃ per hour. Two hours later, the set temperature will maintain as a constant and the air circulation is kept at low speed (Anti-cold function takes precedence over all). Room temperature Time 8.12.4 Auto: After an hour running under economic mode, the set temp will rise 1℃, if it is under cooling mode;...
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Page 26: Model And Parameters
Service manual 9. Model and Parameters Model 38KCR024713 38QCR024713 I3SEC I5MIN IFAN 25℃ 32℃ 30℃ 20℃ 2℃ 12℃ 63℃ 55℃ 50℃ ANGLCOOL ANGLHEAT ANGLOFF... -
Page 27: Troubleshooting
Service manual 10. Troubleshooting Display board 10.1 Operation The indicator flashes once every second after power is on and illuminates when the air conditioner is in operation. Timer indicator: The indicator illuminates then TIMER is set ON. PRE-DEF. -
Page 28: Diagnostic Chart
Service manual NOTE: For cool only model, the defrosting lamp is replaced with fan lamp, but malfunction display remains. Diagnostic chart 10.3 After energizing, no indicator is lighted and the air conditioner can’t be operated. After energizing, the air conditioner can not be operated. Check if AC 220V power supply outputs to indoor PCB. -
Page 29: Resetting Phenomenon Often Occurs During Operation
Service manual Resetting phenomenon often occurs during operation. 10.4 (That is automatically entering to the status when power is on.) The reason is that the instantaneous voltage of main chip is less than 4.5V. Check according to the following procedure: Resetting phenomenon often occurs during operation. - Page 30 Service manual 10.6 Temperature sensor error. Including the indoor room, indoor evaporator and outdoor condenser temperature sensor. Is connector connection good? Repair the connector. Replace the sencor, 10.7 Outdoor unit protects Check if the power supply is good Power supply failure Change outdoor PCB and check if the error is still exit Outdoor PCB failure...
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Page 31: Characteristic Of Temperature Sensor
Service manual 11. Characteristic of temperature sensor Resistance KΩ Resistance KΩ Resistance KΩ Temp.℃ Temp.℃ Temp.℃ 62.2756 14.6181 4.3874 58.7079 13.918 4.2126 56.3694 13.2631 4.0459 52.2438 12.6431 3.8867 49.3161 12.0561 3.7348 46.5725 11.5 3.5896 10.9731 3.451 41.5878 10.4736 3.3185 39.8239 3.1918 37.1988 9.5507...
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