Table of Contents
Related Manuals for North American MSV1I-09HRDN1-M
Summary of Contents for North American MSV1I-09HRDN1-M
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Page 1: Service Manual
NORTH AMERICAN HVAC PRODUCTS LTD Tel: 604-4308496 Fax: 1-866-9034371 www.northamericanhvac.com Service Manual DC Inverter Multi-Zone Split Wall-Mounted Type Indoor Models MSV1I-09HRDN1-M MSV1I-12HRDN1-M Outdoor Models M2OC-18HRDN1-M M3OC-27HRDN1-M... -
Page 2: Table Of Contents
M4OC-36HRDN1-M CONTENT 1. Product features 2. Dimensions 3. Refrigeration cycle diagram 4. Operation limits 5. Indoor unit combination 6. Wiring diagram 7. Electric control functions 8. Troubleshooting Annex 1 Characteristic of temp. sensor Annex 2 Reference data... -
Page 3: Product Features
1. Product features Indoor unit Operation by remote controller Sensing by room temperature Room temperature sensor. Pipe temperature sensor. Room temperature control Maintain the room temperature in accordance w ith the setting temperature. Anti-freezing control in cooling Prevent the water being frozen on evaporator by sensing the evaporator pipe temperature in cooling mode Time Delay Safety control Restarting is for approx. - Page 4 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 5: Dimensions
2 Dimensions 2.1 Vertu Series Indoor unit 9K&12K Dimension Mode 2.2 Outdoor unit a) M2OC-18HRDN1-M、M3OC-27HRDN1-M... - Page 6 b) M4OC-36HRDN1-M...
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Page 7: Refrigeration Cycle Diagram
3 Refrigeration Cycle Diagram 3.1 Refrigeration circuit drawing of inverter quadplex type 3.2 Refrigeration circuit drawing of inverter trinary type... -
Page 8: Indoor Unit
Axial flow fan Liquid valve A Capillary A EXV A Auxiliary Capillary Filter A Exhaust Main temp. sensor Capillary Capillary B EXV B Liquid valve B Filter B Check Condenser Valve Coil temp. Capillary C EXV C flow fan Liquid valve C Evaporator sensor 4-way... -
Page 9: Indoor Unit Combination
5. Indoor units combination 5.1 Indoor unit combination for M2OC-18HRDN1-M One unit Two unit 9+12 5.2 Indoor unit combination for M3OC-27HRDN1-M One unit Two unit Three unit 9+12 9+9+9 9+9+12 12+12 5.3 Indoor unit combination for M4OC-36HRDN1-M One unit Two unit Three unit Four unit 9+12... -
Page 10: Wiring Diagram
6. Wiring Diagram 6.1 Indoor unit (9k/12k) - Page 11 6.2 Outdoor unit (M2OC-18HRDN1-M) 6.3 Outdoor unit (M3OC-27HRDN1-M)
- Page 12 6.4 Outdoor unit (M4OC-36HRDN1-M)
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Page 13: Electric Control Functions
7 Electronic control function 7.1 Electric Control working environment. 7.1.1 Input voltage: 175~253V. 7.1.2 Input power frequency:50Hz. 7.1.3 Indoor fan normal working amp. is less than 1A. 7.1.4 Outdoor fan. Normal working amp. is less than 1.5A. 7.1.5 Four-way valve normal working amp. is less than 1A. 7.1.6 Swing motor: DC12V. - Page 14 original factory settings. The temperature indicator area will display “SC” when the self clean function is started. It also displays the malfunction code or protection code. FAN SPEED indication lamp Displays the selected fan speed: AUTO (nothing) and three fan speed levels: LOW, MED and HIGH.
- Page 15 The Compressor‟s running frequency ―― Check point over 7.4.1 Frequency of compressor: Display Frequency of compressor (Hz) Stand by 7.4.2 Running mode: Display Corresponding mode Cooling mode Heating mode 7.4.3Number of indoor unit Display Number of indoor unit 7.4.4Outdoor ambient temp: Corresponding Corresponding Display...
- Page 16 32.5 17.5 17.5 33.5 18.5 34.5 35~40 19.5 40~45 45~50 20.5 50~55 55~60 21.5 60~65 65~70 22.5 22.5 23.5 24.5 7.4.5Current of outdoor unit Display Corresponding mode 8.0A 8.5A 9.1A 9.6A 10.1A 10.7A 11.2A 12.3A 13.4A 14.5A 15.6A 16.7A 17.9A 7.4.6 No.
- Page 17 7.4.7No. 2 opening degree of electronic expansion valve: Opening degree equals the display data times 8 7.4.8No. 3 opening degree of electronic expansion valve: Opening degree equals the display data times 8 7.5 Protection 7.5.1 3 minutes delay at restart for compressor. 7.5.2 Discharge temperature protection of compressor, compressor stops when the temp.
- Page 18 1.5℃<T<3.5℃ Mid. T>3.5℃ High Room temp. down T> 3℃ High 1℃ <T<3℃ Mid. T<1℃ 7.7.3Anti-freezing control to indoor evaporator at cooling mode( T: evaporator temp. ) Evaporator Temp. Compressor T< 4℃ T > 8℃ 7.8 Dehumidifying mode 7.8.1the indoor fan is fixed in low speed 7.8.2Low room temperature protection: When room temperature decreases to below 10℃, indoor fan stop, when room temperature restores to over 12℃, indoor fan start.
- Page 19 1.0℃<T<2.0℃ Mid. T>2.0℃ 7.9.3Indoor evaporator high-temperature protection at heating mode Condition Compressor T= Indoor exchanger temp. T>63℃ T<48℃ Defrosting operation (Available for heating only) 7.10 Defrost 7.10.1Defrosting condition: The temperature of outdoor heat exchanger remains consecutively lower than -2° c for more than 40 minutes, 7.10.2Ending condition of defrosting If one of following conditions is satisfied, end the defrost and turn into heating mode:...
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Page 20: Troubleshooting
7.13.3Timer off: the A/C will be automatically off at the set time 7.13.4Timer on/off function: if Timer on & Timer off functions have been set at the same time, the A/C will act on which the timer achieves earlier. 7.14Sleep mode 7.14.1It is available at cooling, heating or auto mode. - Page 21 8.1 Safety Because of there are capacitors in PCB and relative circuit in outdoor unit, even shut down the power supply, electricity power still are kept in capacitors, do not forget to discharge the electricity power in capacitor. The value of resistance is about 1500 ohms to 2000 ohms Resistanc The voltage in P3 and P4 in outdoor PCB is high voltage about 310V The voltage in P6 in outdoor PCB is high voltage about 310V...
- Page 22 8.3 LED error code display for outdoor unit Display LED STATUS EEPROM error No 1 Indoor units pipe temp. sensor or connector of pipe temp. sensor is defective No 2 Indoor units pipe temp. sensor or connector of pipe temp. sensor is defective No 3 Indoor units pipe temp.
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Page 23: Indoor Unit Display
Disconnect the power supply, after 1 minute, connect the power supply , turn on the unit with remote controller Does the unit work normally ? Check wiring between indoor and outdoor unit. Is the connection of L, N, S and GND Reconnect and retest again good? Is the GND connection on... - Page 24 Is the indoor fan motor Repair connector connector and connection reconnect good? Is voltage being applied to the fan motor? Indoor defective. (rang 90v-160v between mid Replace the indoor PCB. pin and N on CN1 Replace the indoor fan motor Indoor unit display LED STATUS Outdoor units temp.
- Page 25 Revise the power and retest. Is voltage normal? Is all connection good? Revise the power and retest. Is the wiring to compressor right? Check the moduler if some Repair or replace the moduler. components blow out or be failure? Is it breakdown between Replace the moduler.
- Page 26 Is the connection Does compressor Reconnect and retest. good? operate? refrigerant protector Replace the protector. circulation normal? volume normal? Check the outdoor Charge refrigerant main PCB. Is there some problem? Replace the outdoor PCB. Is abnormality the same after gas charging? Check refrigerant system (such as clogging of capillary, etc)
- Page 27 Is connection to connector of pipe temp. sensor good? Repair connector Check the resistance of the temp. sensor according to Annex 1 Replace the sensor Outdoor unit display LED STATUS No 2 Indoor units pipe temp. sensor or connector of pipe temp. sensor is defective Is connection to connector of pipe temp.
- Page 28 defective Is connection to connector of pipe temp. sensor good? Repair connector Check the resistance of the temp. sensor according to Annex 1 Replace the sensor Outdoor unit display LED STATUS Outdoor units temp. sensor or connector of temp. sensor is defective Is connection to connector of pipe temp.
- Page 29 Check the voltage of power supply, if the voltage is about 220V, turn off the power supply to indoor unit and turn it on again after 1 minute Does the trouble occur again? Check the voltage of secondary of T3 transformer in outdoor power board , is this voltage 12-14V(AC) Replace the outdoor power board...
- Page 30 Outdoor unit display LED STATUS outdoor units communication protection Is the LED in outdoor main PCB light? Check the signal wires between outdoor PCBs, is it connected good. 1.Is the +5 voltage in outdoor main board? Power Board: CN4, Red wire and yellow (GND) Outdoor main PCB: CZ1 2.Is the +3.3v...
- Page 31 Outdoor unit display LED STATUS Compressor top protection against temperature Off: 105c; On: 90c The trouble shooting is same with the one of indoor unit P2 protection. Outdoor unit display LED STATUS Compressor current protection Check the resistance of compressor, normally U and V is 1 ohm U and W is...
- Page 32 Are the U,V,W connected to compressor and inverter module right? Repair connector Replace the outdoor power board If the problem comes to again, check wingding resistance of inverter compressor, is it ohm? Replace inverter compressor Outdoor unit display LED STATUS P4(LED flashes for nine times) Compressor drive malfunction（module protection arose）...
- Page 33 Outdoor unit display LED STATUS Condenser high-temperature protection When outdoor pipe temp. is more than 65° C, the unit will stop, and unit runs again when outdoor pipe temp. less than 52° C. Is the outdoor pipe temp. more than 65° C ? Is the outdoor pipe temp sensor right according to the annex 1 Replace the outdoor main board Replace the outdoor pipe temp sensor...
- Page 34 Annex 1 Characteristic of temp. 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 3.0707...
- Page 35 Annex 2 1. Reference voltage data: a) Rectifier : Input :208-230V(AC), output :310V(DC) b) Inverter module: U,V, W 3ph. Result 60-150V(AC) 60-150V(AC) 60-150V(AC) DC 310V c) Photo-couple PC817, PC851: Control side <+5V, AC side :< 24V(AC) d) S terminal and N: changeable from 0-24V 2.