North American HVAC MSC-28CRDN1-MN15W Service Manual Download

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NORTH AMERICAN HVAC PRODUCTS LTD

3208 BETA AVE, BURNABY BC V5G 4K4

CSNA-1305-A

SERVICE MANUAL

AIR CONDITIONER

SPLIT WALL-MOUNTED TYPE

Corona Series

Summary of Contents for MSC-28CRDN1-MN15W

Page 1: ...NORTH AMERICAN HVAC PRODUCTS LTD 3208 BETA AVE BURNABY BC V5G 4K4 CSNA 1305 A SERVICE MANUAL AIR CONDITIONER SPLIT WALL MOUNTED TYPE Corona Series ...

Page 2: ...3 Pipe length and the elevation 15 6 4 Installation for the first time 16 6 5 Adding the refrigerant after running the system for many years 19 6 6 Re installation while the indoor unit need to be repaired 20 6 7 Re installation while the outdoor unit need to be repaired 22 7 Operation characteristics 25 8 Electronic function 26 8 1 Abbreviation 26 8 2 Display function 26 8 3 Main Protection 27 8 ...

Page 3: ... the product there is risk of fire or electric shock Always ground the product There is risk of fire or electric shock Install the panel and the cover of control box securely There is risk of fire of electric shock Always install a dedicated circuit and breaker Improper wiring or installation may cause fore or electric shock Use the correctly rated breaker of fuse There is risk of fire or electric...

Page 4: ... of fire or electric shock Do not place anything on the power cable There is risk of fire or electric shock Do not plug or unplug the power supply plug during operation There is risk of fire or electric shock Do not touch operation the product with wet hands There is risk of fire or electric shock Do not place a heater or other appliance near the power cable There is risk of fire and electric shoc...

Page 5: ...r product damage Ventilate the product from time to time when operating it together with a stove etc There is risk of fire or electric shock Turn the main power off when cleaning or maintaining the product There is risk of electric shock When the product is not be used for a long time disconnect the power supply plug or turn off the breaker There is risk of product damage or failure or unintended ...

Page 6: ... or loss of property Do not block the inlet or outlet of air flow It may cause product failure Use a soft cloth to clean Do not use harsh detergents solvents etc There is risk of fire electric shock or damage to the plastic parts of the product Do not touch the metal parts of the product when removing the air filter They are very sharp There is risk of personal injury Do not step on or put anythin...

Page 7: ...rent types of batteries There is risk of fire or explosion Do not recharge or disassemble the batteries Do not dispose of batteries in a fire They may burn of explode If the liquid from the batteries gets onto your skin or clothes wash it well with clean water Do not use the remote of the batteries have leaked The chemical in batteries could cause burns or other health hazards The designs and info...

Page 8: ...M Filter O Bio Filter O Golden Fin O Cold catalyst filter Compressor Crankcase Heater O Self Clean O Follow me O 8 degree heating O Heat compensation O Self diag function Hydrophilic aluminum fin Anti rust cabinet Valve protection cover PTC Heating Belt O O optional function ...

Page 9: ...7 3 Dimension 3 1 Indoor Unit Model W mm D mm H mm MSC 28CRDN1 MN15W 1450 265 340 MSC 36CRDN1 MN5W MSC 30HRDN1 MP0W 1445 277 340 MSC 36HRDN1 MN5W For MSC 30HRDN1 MP0W and MSC 36HRDN1 MN5W models ...

Page 10: ...8 For MSC 28CRDN1 MN15W and MSC 36CRDN1 MN5W models ...

Page 11: ... 70cm More than 30cm More than 60cm Service space Fence or obstacles Dimension Mode W D H W1 A B MOG 28CDN1 MN15W 900 315 860 980 590 333 MOG 30HDN1 MP0W 900 315 860 980 590 333 MOJ 36CDN1 MN5W 990 345 965 1075 624 366 MOJ 36HDN1 MN5W 990 345 965 1075 624 366 ...

Page 12: ...10 4 Refrigerant Cycle Diagram For cooling only models INDOOR OUTDOOR LIQUID SIDE GAS SIDE HEAT EXCHANGE EVAPORATOR HEAT EXCHANGE CONDENSER COMPRESSOR CAPILIARY TUBE ...

Page 13: ...NDOOR OUTDOOR LIQUID SIDE GAS SIDE HEAT EXCHANGE EVAPORATOR HEAT EXCHANGE CONDENSER COMPRESSOR 2 WAY VALVE 3 WAY VALVE CHECK VALVE Heating Model only CAPILIARY TUBE REVERSING VALVE Heating Model only COOLING HEATING ACCUMULATOR ...

Page 14: ...12 5 Wiring Diagram 5 1 Indoor Unit MSC 28CRDN1 MN15W MSC 30HRDN1 MP0W MSC 36CRDN1 MN5W MSC 36HRDN1 MN5W ...

Page 15: ...13 5 2 Outdoor Unit MOG 28CDN1 MN15W MOG 30HDN1 MP0W MOJ 36CDN1 MN5W MOJ 36HDN1 MN5W ...

Page 16: ... the cables The power cord of connect should be selected according to the following specifications sheet Rated current of appliance Nominal cross sectional area mm 3 and 6 0 75 6 and 10 1 0 10 and 16 1 5 16 and 25 2 5 The cable size and the current of the fuse or switch are determined by the maximum current indicated on the nameplate which located on the side panel of the unit Please refer to the ...

Page 17: ...1 MP0W MOG 30HDN1 MP0W 5 8 Ф15 9 3 8 Ф9 52 5 10 20 40 MSC 28CRDN1 MN15W MOG 28CDN1 MN15W 5 10 20 40 MSC 36HRDN1 MN5W MOJ 36HDN1 MN5W 5 10 25 40 MSC 36CRDN1 MN5W MOJ 36CDN1 MN5W 5 10 25 40 Caution The capacity test is based on standard length and the maximum permissive length is based on the system reliability Oil trap should be installed per 5 7 meters ...

Page 18: ...ft brush to check for leakage of the connecting points of the piping If bubbles come out the pipes have leakage 1 Air purging with vacuum pump 1 Completely tighten the flare nuts of the indoor and outdoor units confirm that both the 2 way and 3 way valves are set to the closed position 2 Connect the charge hose with the push pin of handle lo to the 3 way valves gas service port 3 Connect the charg...

Page 19: ... indicator is a little higher than the atmosphere pressure Then remove the charge hose from the 3 way valve 8 Fully open the 2 way valve and 3 way valve and securely tighten the cap of the 3 way valve 2 Air purging by refrigerant Procedure 1 Confirm that both the 2 way and 3 way valves are set to the closed position 2 Connect the charge set and a charging cylinder to the service port of the 3 way ...

Page 20: ...erant if the pipe length 5m Procedure 1 Connect the charge hose to the charging cylinder open the 2 way valve and the 3 way valve Connect the charge hose which you disconnected from the vacuum pump to the valve at the bottom of the cylinder If the refrigerant is R410A make the cylinder bottom up to ensure the liquid charge 2 Purge the air from the charge hose Open the valve at the bottom of the cy...

Page 21: ...onnect the charge hose to the 3 way service port open the 2 way valve and the 3 way valve Connect the charge hose to the valve at the bottom of the cylinder If the refrigerant is R410A make the cylinder bottom up to ensure liquid charge 2 Purge the air from the charge hose Open the valve at the bottom of the cylinder and press the check valve on the charge set to purge the air be careful of the li...

Page 22: ...le the indoor unit need to be repaired 1 Collecting the refrigerant into the outdoor unit Procedure 1 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 2 Connect the charge hose with the push pin of handle lo to the 3 way valv...

Page 23: ...by the refrigerant Procedure 1 Confirm that both the 2 way and 3 way valves are set to the closed position 2 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 3 Air purging Open the valves on the charging cylinder and the charge set Purge the air by loosening the flare nut on the 2 way valve approximately 45 for 3 ...

Page 24: ...o tighten the service port cap to a torque 18N m Be sure to check the gas leakage 6 7 Re installation while the outdoor unit need to be repaired 1 Evacuation for the whole system Procedure 1 Confirm that both the 2 way and 3 way valves are set to the opened position 2 Connect the vacuum pump to 3 way valve s service port 3 Evacuation for approximately one hour Confirm that the compound meter indic...

Page 25: ...ale and record the weight 4 Open the valves Low side on the charge set and charge the system with liquid refrigerant If the system cannot be charge with the specified amount of refrigerant or can be charged with a little at a time approximately 150g each time operating the air conditioner in the cooling cycle however one time is not sufficient wait approximately 1 minute and then repeat the proced...

Page 26: ...24 Use torque wrench to tighten the service port cap to a torque of 18N m Be sure to check for gas leakage ...

Page 27: ...ide of the above conditions certain safety protection features may come into operation and cause the unit to function abnormally 2 Room relative humidity less than 80 If the air conditioner operates in excess of this figure the surface of the air conditioner may attract condensation Please set the vertical air flow louver to its maximum angle vertically to the floor and set HIGH fan mode 3 Optimum...

Page 28: ...uminates when the air conditioner starts defrosting automatically or when the warm air control feature is activated in heating mode TEMPERATURE indicator Usually it displays the temperature settings When change the setting temperature this indicator begins to flash and stops 20 seconds later It displays the room temperature when the air conditioner is in FAN only operation and the range of that is...

Page 29: ...rease the frequency to the lower level every 3 minutes 90 T5 105 keep running at the current frequency T5 90 no limit for frequency 8 3 4 Fan Speed is out of control When Indoor Fan Speed keeps too low or too high for certain time the unit will stop and the LED will display the failure 8 3 5 Inverter module Protection The Inverter module itself has a protection function against current voltage and...

Page 30: ...he correct zero crossing signal time interval should be between 6 13ms 8 3 9 Sensor protection at open circuit and breaking disconnection 8 4 Operation Modes and Functions 8 4 1 Fan mode 1 Outdoor fan and compressor stop 2 Temperature setting function is disabled and no setting temperature is displayed 3 Indoor fan can be set to high med low auto 4 The louver operates same as in cooling mode 5 Aut...

Page 31: ...ctive 7 minutes later the compressor running frequency will be controlled as below While Temp zone A B C D E F G Frequency F8 F8 F7 F6 F5 F3 F1 Note When the value of T1 minus Ts keeps in the same temp zone for 3 minutes the compressor will run as the below rules 20 22 28 30 40 38 45 43 Fmax F4 Fmax F7 Fmax F8 Fmax F6 Fmax F3 T4 1 0 0 5 0 5 1 0 1 5 2 0 2 5 3 0 3 5 A B C D E F G H T1 TS ...

Page 32: ...nning frequency to the lower level Hold Keep the current frequency Resume No limitation for frequency Note When AC is in hold zone for 3 minutes the compressor frequency will rise to the higher level The frequency will increase twice at most 8 4 2 2 Indoor fan running rules In cooling mode indoor fan runs all the time and the speed can be selected as high medium low and auto Auto fan in cooling mo...

Page 33: ... 0 the compressor will stop and restart when T2 5 When 0 T2 4 the compressor frequency will be limited and decreased to the lower level every minute When 4 T2 7 the compressor will keep the current frequency When T2 7 the compressor frequency will not be limited 8 4 3 Heating Mode 8 4 3 1 Compressor running rules The operation frequency of compressor after starting submits to following rule After ...

Page 34: ...ps in the same temp zone for 3 minutes the compressor will run as the below rules A E Increase the frequency to the higher level until to F10 F Keep the current frequency G Decrease the frequency to the lower level until to F1 H Run at F1 for 1h if T1 Ts ΔT 6 compressor will stop Meanwhile the compressor running frequency is limited by the current Off Compressor stop ...

Page 35: ... rules 17 15 Low High 8 4 3 3 Indoor fan running rules If the compressor stops caused by room temperature rising indoor fan will be forced to run 127 seconds with breeze During this period anti cold wind is disabled After this anti cold wind function is available If the machine runs in rating capacity test mode indoor fan runs with rating speed and anti cold wind is disabled Indoor fan speed can b...

Page 36: ...dition 1 if the two items are satisfied then judges if T2 has decreased for more than 5 When T2 has decreased for more than 5 enter the defrosting mode Condition 3 No matter what value T4 is if the machine runs with T3 3 for more than 120 minutes and T3 keeps lower than 4 for more than 3 minutes the machine will defrost no matter if T2 drops for more than 5 or not Condition of ending defrosting If...

Page 37: ...35 The defrosting action Compressor on off on on on off off off 4 way valve Outdoor fan Indoor fan Indoor fan breeze 10s xx 10s no longer than 10m 30s FrequencyF8 10s Frequency F2 XX 60 ...

Page 38: ...rying mode 8 4 4 1 Indoor fan speed is fixed at breeze and can t be changed The louver angle is the same as cooling mode 8 4 4 2 Compressor running rules 2 0 1 5 1 0 F3 F2 F1 F1 2 5 0 5 0 0 8 4 4 3 Over low room temperature protection In drying mode if room temperature is lower than 10 the compressor will stop and not resume until room temperature exceeds 12 8 4 4 4 Evaporator anti freezing protec...

Page 39: ...arry the machine to forced auto mode after this if pressing the button once again within 5 seconds the machine will turn into forced cooling mode In forced auto forced cooling or any other operation mode pressing touch button will turn off the machine In forced operation remote control is available 8 4 6 3 In forced operation mode all general protections is available 8 4 6 4 The compressor runs at...

Page 40: ...leep mode or sleep function in timer off mode if the timing is less than 7 hours sleep function will be cancelled when reaching the setting time If the timing is more than 7 hours the machine will not stop until reaches the setting time in sleep mode 8 4 9 Auto Restart function The indoor unit is equipped with auto restart function which is carried out through an auto restart module In case of a s...

Page 41: ...39 8 4 10 3 Outdoor fan action in cooling drying mode including cooling in auto forced mode Please refer to the picture above ...

Page 42: ...IGBT over strong current protection P1 Over voltage or too low voltage protection P3 Outdoor temperature is lower than 15 optional function P4 Inverter compressor drive error Note P3 If the outdoor temperature 15 C for 1 hour then the machine stops running the indoor display shows the error code P3 The unit can still receive remote control signals If the outdoor 12 C for 10 minutes the compressor ...

Page 43: ...he main PCB directly Otherwise check whether the EEPROM chip plugged in main PCB well Yes No Yes Correct the connection Replace the indoor main PCB Shut off the power supply and turn it on 5 seconds later Is it still displaying the error code EEPROM a read only memory whose contents can be erased and reprogrammed using a pulsed voltage ...

Page 44: ...he error still displaying after several minutes No Yes Change the outdoor main PCB Power on Is the error extinguished Check all the wirings between indoor and outdoor indoor main PCB and outdoor main PCB following the wiring diagram Are all the wirings connected correctly Is the wiring to the indoor main PCB connected correctly Change the indoor main PCB Yes Change the outdoor main PCB No Is the w...

Page 45: ...mally Find out the cause and have it solved For example check whether the fan is blocked or the bearing is broken Check the wires of fan motor Are all the connections good No Yes No Correct the connections No Yes Check whether the main PCB is normal through index 2 Yes Yes Check whether the fan motor is normal through index 1 Yes Replace the fan motor Replace the main PCB The malfunction is solved...

Page 46: ...tor please contact the technical engineer Index2 1 Indoor AC Fan Motor Power on and set the unit running in fan mode at high fan speed After running for 15 seconds measure the voltage of pin1 and pin2 If the value of the voltage is less than 100V 208 240V power supply or 50V 115V power supply the PCB must has problems and need to be replaced ...

Page 47: ...onnections between temperature sensor and main PCB Are the connections good Correct the connections No Yes Yes Replace indoor or outdoor main PCB Replace the sensor and c h e c k i f t h e p r o b l e m happen again Check the resistance value of the sensor via table1 and table 2 is it normal No ...

Page 48: ...apply silicon grease No IPM continuity check Check if the IPM terminal resistance values are uniform Yes Replace the IPM board or replace the main PCB if the IPM board and main PCB are integrated together No Check if the outdoor fan runs properly or the outdoor unit ventilation is good Yes No Refer to the solution of fan speed has been out of control malfunction Find out the cause and have it solv...

Page 49: ...ets normal No Yes No Correct the connections or replace the wires Yes Power on and when the unit is in standby check if the voltage between P and N is around DC 310V or 340V or 380V For different kinds of units the voltage differs Consult with technical engineer to get definite value Then start up the unit measure the voltage between P and N Is it in 220V 400V Replace outdoor mainl PCB Yes No Repl...

Page 50: ...on grease No IPM continuity check Check if the IPM terminal resistance values are uniform Yes Replace the IPM board or replace the main PCB if the IPM board and main PCB are integrated together No Check if the outdoor fan runs properly or the outdoor unit ventilation is good Yes No Refer to the solution of fan speed has been out of control malfunction Find out the cause and have it solved Yes Chec...

Page 51: ... Compressor discharge temp T5 sensor Measure the resistance value of each winding by using the multi meter Table 1 Some frequently used R T data for T1 T2 T3 and T4 sensor Temperature 5 10 15 20 25 30 40 50 60 Resistance Value KΩ 26 9 20 7 16 1 12 6 10 8 5 2 3 5 2 4 Table 2 Some frequently used R T data for T5 sensor Temperature 5 15 25 35 60 70 80 90 100 Resistance Value KΩ 141 6 88 56 1 36 6 13 ...

Page 52: ...157 Model MSC 30HRDN1 M P0W MSC 36HRDN1 MN5 W MSC 28CRDN1 MN1 5W MSC 36CRDN1 MN5 W Compressor DA250S2C 30MT TNB306FPGMC L DA250S2C 30MT TNB306FPGMC L Indoor fan motor YDK65 4B YDK65 4B YDK65 4B YDK65 4B Outdoor fan motor YDK53 6NB YDK180 8GB YDK53 6NB YDK180 8GB ...

Page 53: ...er 3 Indoor AC Fan Motor Measure the resistance value of each winding by using the tester Position Resistance Value YDK65 4B Black Red 81Ω 8 20 Red Yellow 75 5Ω 8 20 Yellow Blue 75 5Ω 8 20 Position Resistance Value DA250S2C 30MT TNB306FPGMC L Blue Red 0 55Ω 20 0 53Ω 20 Blue Black Red Blue ...

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