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North American HVAC MSC-28CRDN1-MN15W Service Manual

North american hvac msc-28crdn1-mn15w; msc-36crdn1-mn5w; msc-30hrdn1-mp0w; msc-36hrdn1-mn5w air conditioner split wall - mounted type
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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

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Summary of Contents for North American HVAC MSC-28CRDN1-MN15W

  • Page 1: Service Manual

    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: Table Of Contents

    CONTENTS 1. Precaution ..............................1 1.1 Safety Precaution .......................... 1 1.2 Warning ............................1 2. Function ................................ 6 3. Dimension ..............................7 3.1 Indoor Unit ............................. 7 3.2 Outdoor Unit ..........................9 4. Refrigerant Cycle Diagram ........................10 5. Wiring Diagram ............................12 5.1 Indoor Unit ...........................

  • Page 3: Precaution

    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  For installation, always contact the dealer or an Authorized service center. There is risk of fire, electric shock, explosion, or injury.  Do not install the product on a defective installation stand. It may cause injury, accident, or damage to the product. ...
  • Page 5  If strange sounds, or small or smoke comes from product. Turn the breaker off or disconnect the power supply cable. There is risk of electric shock or fire.  Stop operation and close the window in storm or hurricane. If possible, remove the product from the window before the hurricane arrives.
  • Page 6 the neighborhoods. It may cause a problem for your neighbors.  Use two or more people to lift and transport the product. Avoid personal injury.  Do not install the product where it will be exposed to sea wind (salt spray) directly. It may cause corrosion on the product.
  • Page 7 It is not sanitary could cause serious health issues.  Use a firm stool or ladder when cleaning or maintaining the product. Be careful and avoid personal injury.  Replace the all batteries in the remote control with new ones of the same type. Do not mix old and mew batteries or different types of batteries.

  • Page 8: Function

    2. Function Filter Cold catalyst filter Ionizer(O) 8 degree heating(O) Silver Ico Filter(O) Heat compensation(O) Vitamin C Filter(O) Self-diag. function 3M HAM Filter(O) Hydrophilic aluminum fin Bio Filter(O) Anti-rust cabinet Golden Fin(O) Valve protection cover Self Clean(O) PTC Heating Belt(O) Follow me(O) Compressor Crankcase Heater(O) O: optional function...

  • Page 9: Dimension

    3. Dimension 3.1 Indoor Unit Model W(mm) D(mm) H(mm) MSC-28CRDN1-MN15W 1450 MSC-36CRDN1-MN5W MSC-30HRDN1-MP0W 1445 MSC-36HRDN1-MN5W For MSC-30HRDN1-MP0W and MSC-36HRDN1-MN5W models:...
  • Page 10 For MSC-28CRDN1-MN15W and MSC-36CRDN1-MN5W models:...

  • Page 11: Outdoor Unit

    3.2 Outdoor Unit More than 30cm More than 60cm (Service space) More than 30cm More than 60cm More than 70cm Dimension Mode MOG-28CDN1-MN15W MOG-30HDN1-MP0W MOJ-36CDN1-MN5W 1075 MOJ-36HDN1-MN5W 1075...

  • Page 12: Refrigerant Cycle Diagram

    4. Refrigerant Cycle Diagram For cooling only models: INDOOR OUTDOOR LIQUID SIDE CAPILIARY TUBE HEAT HEAT EXCHANGE EXCHANGE (EVAPORATOR) (CONDENSER) GAS SIDE COMPRESSOR...
  • Page 13 For heat pump models: INDOOR OUTDOOR CHECK VALVE LIQUID SIDE (Heating Model only) 2-WAY VALVE CAPILIARY TUBE HEAT HEAT EXCHANGE EXCHANGE (EVAPORATOR) (CONDENSER) GAS SIDE REVERSING VALVE 3-WAY VALVE (Heating Model only) ACCUMULATOR COOLING COMPRESSOR HEATING...

  • Page 14: Wiring Diagram

    5. Wiring Diagram 5.1 Indoor Unit MSC-28CRDN1-MN15W,MSC-30HRDN1-MP0W, MSC-36CRDN1-MN5W,MSC-36HRDN1-MN5W...

  • Page 15: Outdoor Unit

    5.2 Outdoor Unit MOG-28CDN1-MN15W,MOG-30HDN1-MP0W MOJ-36CDN1-MN5W, MOJ-36HDN1-MN5W...

  • Page 16: Installation Details

    6 Installation details 6.1 Wrench torque sheet for installation Outside diameter Torque Additional tightening torque inch N.cm N.cm Ф6.35 1500 1600 Ф9.52 2500 2600 Ф12.7 3500 3700 Ф15.9 4500 4700 Ф19 6500 6700 6.2 Connecting the cables The power cord of connect should be selected according to the following specifications sheet. Rated current of appliance Nominal cross-sectional area (mm²...

  • Page 17: Pipe Length And The Elevation

    Model length Elevation Length refrigerant Liquid B (m) A (m) (g/m) MSC-30HRDN1-MP0W+MOG-30HDN1-MP0W MSC-28CRDN1-MN15W+MOG-28CDN1-MN15W 3/8’’ 5/8’’ (Ф15.9) (Ф9.52) MSC-36HRDN1-MN5W+MOJ-36HDN1-MN5W MSC-36CRDN1-MN5W+MOJ-36CDN1-MN5W 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: Installation For The First Time

    6.4 Installation for the first time Air and moisture in the refrigerant system have undesirable effects as below: ● Pressure in the system rises. ● Operating current rises. ● Cooling or heating efficiency drops. ● Moisture in the refrigerant circuit may freeze and block capillary tubing. ●...
  • Page 19 the meter does not indicate -0.1Mpa after pumping 30 minutes, it should be pumped 20 minutes more. If the pressure can’t achieve -0.1Mpa after pumping 50 minutes, please check if there are some leakage points. Fully close the handle Lo valve of the manifold valve and stop the operation of the vacuum pump. Confirm that the gauge needle does not move (approximately 5 minutes after turning off the vacuum pump).
  • Page 20 Close the valve on the charging cylinder and discharge the refrigerant by loosening the flare nut on the 2-way valve approximately 45’ until the gauge indicates 0.3 to 0.5 Mpa. 6). Disconnect the charge set and the charging cylinder, and set the 2-way and 3-way valves to the open position.

  • Page 21: Adding The Refrigerant After Running The System For Many Years

    6).When the electronic scale displays the proper weight (refer to the table), disconnect the charge hose from the 3-way valve’s service port immediately and turn off the air conditioner before disconnecting the hose. 7). Mount the valve stem caps and the service port Use torque wrench to tighten the service port cap to a torque of 18N.m.

  • Page 22: Re-Installation While The Indoor Unit Need To Be Repaired

    6).When the electronic scale displays the proper weight (refer to the gauge and the pressure of the low side), disconnect the charge hose from the 3-way valve’s service port immediately and turn off the air conditioner before disconnecting the hose. 7).
  • Page 23 5). Operate the air conditioner at the cooling cycle and stop it when the gauge indicates 0.1MPa. 6). Set the 3-way valve to the closed position immediately Do this quickly so that the gauge ends up indicating 0.3 to 0.5Mpa. Disconnect the charge set, and tighten the 2-way and 3-way valve’s stem nuts.

  • Page 24: Re-Installation While The Outdoor Unit Need To Be Repaired

    Close the valve on the charging cylinder and discharge the refrigerant by loosening the flare nut on the 2-way valve approximately 45’ until the gauge indicates 0.3 to 0.5 Mpa. 6). Disconnect the charge set and the charging cylinder, and set the 2-way and 3-way valves to the open position Be sure to use a hexagonal wrench to operate the valve stems.
  • Page 25 2. Refrigerant charging Electronic scale 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.
  • Page 26 Use torque wrench to tighten the service port cap to a torque of 18N.m. Be sure to check for gas leakage.

  • Page 27: Operation Characteristics

    7. Operation characteristics Mode Cooling operation Heating operation Drying operation Temperature ≥17℃ ≦30℃ ﹥10℃ Room temperature 0℃~50℃ (-15℃ ~ 50℃:For the Outdoor temperature -15℃~30℃ 0℃~ 50℃ models with low temperature cooling system) CAUTION: 1. If air conditioner is used outside of the above conditions, certain safety protection features may come into operation and cause the unit to function abnormally.

  • Page 28: Electronic Function

    8. Electronic function 8.1 Abbreviation T1: Indoor room temperature T2: Coil temperature of evaporator T3: Coil temperature of condenser T4: Outdoor ambient temperature T5: Compressor discharge temperature 8.2 Display function 8.2.1 Icon explanation on indoor display board. ① Auto indicator This indicator illuminates when the air conditioner is in AUTO operation.

  • Page 29: Main Protection

    frequency. 8.2.2 LED display control function. Pressing “LED display” button on remote controller will turn off all displays on indoor unit, while pressing once again, all displays will resume. 8.3 Main Protection 8.3.1 Three Minutes Delay at restart for compressor. ---- 1 minute delay for the 1st time start-up and 3 minutes delay for others.

  • Page 30: Operation Modes And Functions

    A weak current flow through the coil of compressor from the wiring terminal of compressor, then the compressor is heated without operation. ----Preheating release condition: If T4＞5℃ or the compressor starts running, preheating function will stop. ---- Heating cable It starts when T4<5℃ and stops when T4>15℃ 8.3.8 Zero crossing detection error protection If AC detects time interval is not correct for continuous 20 zero crossing signal, the unit will stop and the LED will display the failure.
  • Page 31 ℃ Fmax=F4 Fmax=F7 Fmax=F8 Fmax=F6 Fmax=F3 If users switch on AC by remote controller, the compressor will run at the Fmax frequency for 7 minutes according to outdoor ambient temp. During the 7 minutes, frequency limitation is active. 7 minutes later, the compressor running frequency will be controlled as below: T1-TS ℃...
  • Page 32 A~E: Increase the frequency to the higher level until to F8. 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<-2℃, compressor will stop) Meanwhile, the compressor running frequency is limited by the current. Current Compressor off I3COOL...
  • Page 33 8.4.2.3 Condenser high temperature T3 protection. When 55℃<T3<60℃, the compressor frequency will decrease to the lower level until to F1 and then runs at F1. When T3<54℃, the compressor will keep running at the current frequency. When T3<52℃, the compressor will not limit the frequency and resume to the former frequency. When T3>60℃...
  • Page 34 +5.0 +4.5 +3.5 +3.0 +2.5 +2.0 +1.5 +1.0 +0.5 While Temp. zone Frequency ΔT=0℃ as factory setting. Note: When T1-Ts keeps 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.
  • Page 35 Decrease: Running frequency decrease to 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.(frequency increases twice at most) 8.4.3.2 Outdoor fan running rules: High 8.4.3.3 Indoor fan running rules:...
  • Page 36 The auto fan action in heating mode: 8.4.3.4 Defrosting mode： The condition of defrosting: Condition 1: If T4＞0℃, When the units are running, if the following two items are satisfied the units start defrosting: The units runs with T3＜3℃ for 40 minutes and T3 keeps lower than -6℃ for more than 3 minutes. The units runs with T3＜3℃...
  • Page 37 The defrosting action： Frequency F2 FrequencyF8 Compressor 4-way valve Outdoor fan Indoor fan Indoor fan breeze(10s) no longer than 10m XX=60.
  • Page 38 8.4.3.5 High evaporator coil temp.T2 protection: (1) T2>53℃, compressor running frequency decreases to the lower level and runs for 20s. When the frequency decreases to F2 and the T2 exceeds 53℃ for 3 minutes, the compressor will stop. (2) If T2<48℃ or T2 stays in 48℃~53℃ for 6 minutes, the frequency will not be limited by T2. (3) If T2>60℃, the compressor will stop and restart when T2<48℃.
  • Page 39 8.4.5 Auto-mode This mode can be chosen with remote controller and the setting temperature can be changed between 17~30℃. In auto mode, the machine will choose cooling or fan-only mode according to ΔT (ΔT =T1-Ts). ΔT=T1-Ts Running mode ΔT＞1℃ Cooling -1<ΔT≤1℃...
  • Page 40 time. 8.4.7.4 Timer on/off. After turning off, the machine will turn on automatically when reaching the setting “on” time, and then turn off automatically when reaching the setting “off” time. 8.4.7.5 Timer off/on. After turning on, the machine will turn off automatically when reaching the setting “off”...
  • Page 41 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: Troubleshooting

    9. Troubleshooting 9.1 Indoor Unit Error Display Display LED STATUS EEPROM parameter error Indoor / outdoor units communication protection Indoor fan speed has been out of control Open circuit or short circuit of outdoor temperature sensor Open circuit or short circuit of room or evaporator temperature sensor IPM malfunction or IGBT over-strong current protection Over voltage or too low voltage protection Outdoor temperature is lower than 15 ℃...

  • Page 43: Diagnosis And Solution

    9.2 Diagnosis and Solution 9.2.1 EEPROM parameter error diagnosis and solution(E0) Shut off the power supply and turn it on 5 seconds later. Is it still displaying the error code? If the EEPROM chip is welded on main PCB, replace the main PCB directly.
  • Page 44 9.2.2 Indoor unit and outdoor unit communication protection error diagnosis and solution(E1) Power off, then turn on the unit 5 seconds later(reconnect the power wire).Is the error still displaying after several minutes? Check all the wirings between indoor and outdoor, indoor main PCB and outdoor main PCB following the wiring diagram.
  • Page 45 9.2.3 Indoor fan speed has been out of control diagnosis and solution(E3) Shut off the power supply and turn it on 5 seconds The unit operates normally. later. Is it still displaying the error code? Find out the cause and have it solved.
  • Page 46 Index 1: 1.Indoor AC Fan Motor Measure the resistance value of each winding by using the tester. For the definite resistance value of the motor, 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.
  • Page 47 9.2.4 Open or short circuit of temperature sensor diagnosis and solution. (E5/E6) Check the connections between temperature sensor and main PCB. Correct the connections. Are the connections good? Check the resistance value Replace indoor or outdoor main of the sensor via table1 PCB.
  • Page 48 9.2.5 IPM malfunction or IGBT over-strong current protection diagnosis and solution(P0) Check if the wiring between main Correct the connection or PCB and compressor connected by replace the wires and error and if the wires and connectors connectors. are broken? Correct the installation, Check if the IPM installed correctly.
  • Page 49 9.2.6 Over voltage or too low voltage protection diagnosis and solution(P1) Disconnect the unit with power Check if the power supply is supply and try to restart the unit normal. when power supply gets normal. Check if all the connections Correct the connections or replace and wires are good? the wires.
  • Page 50 9.2.7 Inverter compressor drive error diagnosis and solution(P4) Check if the wiring between main Correct the connection or PCB and compressor connected by replace the wires and error and if the wires and connectors connectors. are broken? Correct the installation, Check if the IPM installed correctly.
  • Page 51 Main parts check Temperature sensor checking Disconnect the temperature sensor from PCB, measure the resistance value with a tester. Temperature Sensors. Room temp.(T1) sensor, Indoor coil temp.(T2) sensor, Outdoor coil temp.(T3) sensor, Outdoor ambient temp.(T4) sensor, Compressor discharge temp.(T5) sensor. Measure the resistance value of each winding by using the multi-meter.
  • Page 52 Spec. Code 2T0033100129 2T0033100128 2T0033100156 2T0033100157 MSC-30HRDN1-M MSC-36HRDN1-MN5 MSC-28CRDN1-MN1 MSC-36CRDN1-MN5 Model Compressor DA250S2C-30MT TNB306FPGMC-L DA250S2C-30MT TNB306FPGMC-L Indoor fan YDK65-4B YDK65-4B YDK65-4B YDK65-4B motor Outdoor fan YDK53-6NB YDK180-8GB YDK53-6NB YDK180-8GB motor...
  • Page 53 Compressor checking Measure the resistance value of each winding by using the tester. Position Resistance Value DA250S2C-30MT TNB306FPGMC-L Blue - Red 0.53Ω 0.55Ω (20℃) Blue - Black (20℃) Red - Blue 3.Indoor AC Fan Motor Measure the resistance value of each winding by using the tester. Position Resistance Value YDK65-4B...

This manual is also suitable for:

Msc-36crdn1-mn5wMsc-30hrdn1-mp0wMsc-36hrdn1-mn5w

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