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Heat Controller VMH C Series, Service Manual

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19

Heat Controller 

VMH 30, 36 SerieS

 

Service Manual

 

 

17 

8. Electronic function

s

 

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 

TS:  Preset 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. 

②

  Timer indicator 

   This indicator illuminates when TIMER is set ON/OFF. 

③

  PRE.-DEF. Indicator 

This indicator illuminates when the air conditioner starts defrosting automatically or when the warm air 

control feature is activated in heating mode. 

④

  TEMPERATURE indicator 

Usually 

this

 displays the temperature settings. When changing  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 32~122°F (or 50°C). When the unit stops operation, it 

returns to original factory settings. It will also display the codes when 

a fault occurs

. 

⑤

  Frequency indicator 

Summary of Contents for VMH C Series

Page 1: ...Heat Controller 1900 Wellworth Ave Jackson MI 49203 517 787 2100 www heatcontroller com SERVICE MANUAL Inverter Single Zone Ductless Mini Split Heat Pump VMH Series Version C VMH30SC 1 VMH36SC 1...

Page 2: ...2 Outdoor Unit 14 6 Installation Details 15 6 1 Wrench torque sheet for installation 15 6 2 Power Wiring 15 6 3 Pipe length and elevation 16 6 4 Pressure test and evacuation 17 7 Operation characteri...

Page 3: ...r an authorized service center Do not disassemble or repair the product there is a risk of fire or electric shock n Always ground the product There is a risk of fire or electric shock n Install the pa...

Page 4: ...to ensure that the power cable can not be pulled out or damaged during operation There is a risk of fire or electric shock n Do not place anything on the power cable There is a risk of fire or electri...

Page 5: ...ain power off when cleaning or maintaining this product There is risk of electric shock n When this product is not used for a long time disconnect the power supply or turn off the breaker There is ris...

Page 6: ...the inlet or outlet of air flow It may cause product failure n Use a soft cloth to clean Do not use harsh detergents solvents etc There is a risk of fire electric shock or damage to the plastic parts...

Page 7: ...type Do not mix old and new batteries or different types of batteries There is risk of fire or explosion n Do not recharge or disassemble the batteries Do not dispose of batteries in a fire They may b...

Page 8: ...nd high med low auto Restarting after for approx 3 minutes to protect the compressor Prevents the water from freezing on evaporator by sensing the evaporator pipe temperature in cooling mode Indoor un...

Page 9: ...r from dripping The unit has 3 minute delay between ON OFF operations Outdoor unit Power relay control Valve protection cover Low noise air flow system Propeller fan makes the outdoor unit run more qu...

Page 10: ...10 Service Manual VMH 30 36 Series Heat Controller 3 Dimension 3 1 Indoor Unit Model W in mm D in mm H in mm B VMH30SC 1 56 9 1445 8 9 277 13 4 340 B VMH36SC 1...

Page 11: ...ies Service Manual 3 2 Outdoor Unit Dimension Mode W in mm D in mm H in mm W1 in mm A in mm B in mm A VMH30SC 1 35 4 900 12 4 315 33 9 860 38 9 980 23 2 590 13 1 333 A VMH36SC 1 39 0 990 13 6 345 38 0...

Page 12: ...efrigerant Cycle Diagram INDOOR 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...

Page 13: ...13 Heat Controller VMH 30 36 Series Service Manual...

Page 14: ...14 Service Manual VMH 30 36 Series Heat Controller 5 2 Outdoor Unit A VMH30SC 1 A VMH36SC 1...

Page 15: ...00 6 2 Power wiring connecting cables Power Wiring Consult local building codes NEC National Electric Code or CEC Canadian Electric Code for special requirements Connecting Cables Voltage drop on the...

Page 16: ...charge on rating plate includes enough refrigerant for 16 5 ft 5m of line set The capacity is based on standard length and the maximum permissive length is based on the system reliability Oil trap sh...

Page 17: ...nifold gauge low side hose to low side service valve 2 Connect the manifold gauge charge hose to the vacuum pump 3 Fully open the low side of manifold gauge 4 Start vacuum pump 5 Evacuate using either...

Page 18: ...oes occur place the vertical air louver to it s maximum angle vertically to the floor and set the fan to high speed 16 2 Deep Vacuum Method The deep vacuum method requires a vacuum pump capable of pul...

Page 19: ...his indicator illuminates when TIMER is set ON OFF PRE DEF Indicator This indicator illuminates when the air conditioner starts defrosting automatically or when the warm air control feature is activat...

Page 20: ...emp raises the running frequency will be limited as follow When compressor discharge temp T5 239 F 115 C for 5 seconds compressor stops 226 F 108 C T5 239 F 115 C decrease the frequency every 3 minute...

Page 21: ...Preheating release condition If T4 41 F 5 C or the compressor starts running preheating function will stop Heating cable Starts when T4 41 F 5 C and stops when T4 59 F 15 C 8 4 Operation Modes and Fun...

Page 22: ...the following rule 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 i...

Page 23: ...Runs at F1 for 1hour If T1 TS 35 F 2 C the compressor will stop Meanwhile the compressor running frequency is limited by the current Off Compressor stop Decrease Decrease the running frequency to the...

Page 24: ...r will keep running at the current frequency When T3 125 5 F 52 C the compressor will not limit the frequency and resume to the former frequency When T3 140 F 60 C for 5 seconds the compressor will st...

Page 25: ...r ambient temp During the 7 minutes frequency limitation is available 7 minutes later compressor running frequency will be controlled as below 5 0 4 5 3 5 3 0 2 5 2 0 1 5 1 0 H G H F E D C B A 0 5 Whi...

Page 26: ...to F1 H Run at F1 for 1hour If T1 TS T 43 F 6 C the compressor will stop Meanwhile the compressor running frequency is limited by the current Off Compressor stop Decrease Running frequency decrease t...

Page 27: ...the machine runs in rating capacity test mode indoor fan runs with rating speed and anti cold wind is disabled Indoor fan speed can be set on high medium low or auto models but the anti cold wind fun...

Page 28: ...re than 9 F 5 C it enter the defrosting mode Condition 3 No matter what value T4 is if the machine runs with T3 37 5 F 3 C for more than 120 minutes and T3 keeps lower than 25 F 4 C for more than 3 mi...

Page 29: ...en T2 118 5 F 48 C 8 4 4 Drying 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...

Page 30: ...e controller to any other mode 8 4 6 2 When the machine is off pressing the touch button will carry the machine to forced auto mode Pressing the button once again within 5 seconds Will switch unto to...

Page 31: ...0 C every one hour 2 hours later the setting temperature stops rising and indoor fan is fixed at low speed 8 4 8 3 Timer setting is available 8 4 8 4 When user uses timer off function in sleep mode or...

Page 32: ...button to activate the function Press it again to stop the function During the time when Ionizer is controlled by remote controller Ionizer will be turned off automatically if indoor fan stops running...

Page 33: ...oor fan speed has been out of control O O E5 Open or short circuit of outdoor temperature sensor X O X E6 Open or short circuit of room or evaporator temperature sensor O O O E7 Outdoor fan has been s...

Page 34: ...2 1 EEPROM parameter error diagnosis and solution Replace indoor PCB Shut off the power supply and turn on 5 seconds later Does it run The problem comes out again Is the EEPROM chip plugged in indoor...

Page 35: ...nd Indoor PCB connected properly Is all the wiring to the Outdoor PCB connected correctly Possible electromagnetic interference Reconnect and retest Reconnect and retest Yes 24V Vs 24V DC Vs is the vo...

Page 36: ...he sensor and check if the errors happen again Is the fan motor connector and connection good The unit does not work normally Turn off the unit rotate the cross fan Does it rotate freely No Disassembl...

Page 37: ...osis and solution Is the power supply good Replace the outdoor electrical box Make sure the power supply is normal Yes No Yes Fastening the IPM to the radiator No Check whether the connections between...

Page 38: ...otector normal No No Is the connection good There is a blockage Such as capillary or welded points of the pipes Is refrigerant circulation volume normal Replace it Reconnect it Does compressor operate...

Page 39: ...39 Heat Controller VMH 30 36 Series Service Manual...

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