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Mars COMFORT-AIRE Century VFH-B Series Service Manual

Inverter multi zone ductless mini-split
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Service Manual
VFH-B Series
Inverter Multi Zone Ductless Mini-Split
A-VFH30QB-1
A-VFH36QB-1
A-VFH42PB-1
www.marsdelivers.com

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Summary of Contents for Mars COMFORT-AIRE Century VFH-B Series

  • Page 1 Service Manual VFH-B Series Inverter Multi Zone Ductless Mini-Split A-VFH30QB-1 A-VFH36QB-1 A-VFH42PB-1 www.marsdelivers.com...

  • Page 3: Table Of Contents

    Service Manual - VFH-B 30/36/42 Series Table of Contents Part : Technical Information ...............4 1. Summary ........................4 ......................5 ........................5 ......................9 3. Outline Dimension Diagram ................12 4. Refrigerant System Diagram ..............13 5. Electrical Part ......................14 ........................14 ......................16 6. Function and Control ..................17 Part : Installation and Maintenance...

  • Page 4: Part : Technical Information

    Service Manual - VFH-B 30/36/42 Series Part : Technical Information 1. Summary Outdoor Unit...
  • Page 5 Service Manual - VFH-B 30/36/42 Series 208/230 28500 30000 2280 2350 9.91 10.22 3800 16.86 12.50 12.76 21.00 10.50 13.9 4150 0~118 -4~86 2-1/16 2330 145.5 154.4 98.8...
  • Page 6 Service Manual - VFH-B 30/36/42 Series 0.0062 131.2 24.6 49.2 49.2 82.0 229.7...
  • Page 7 Service Manual - VFH-B 30/36/42 Series 208/230 208/230 34000 36000 42500 43000 2800 3740 3350 3650 12.5 16.5 3800 4000 12.14 9.63 12.69 11.78 21.00 21.00 10.20 10.20 15.6 17.8 4150 4150 0~118 0~118 -4~86 -4~86 2-1/16 2-1/16 4531 4531 198.5 198.5 216.1...
  • Page 8 Service Manual - VFH-B 30/36/42 Series 0.0062 0.0062 Factory charge good for: 131.2 131.2 24.6 24.6 49.2 49.2 82.0 82.0 246.1 246.1...
  • Page 9 Service Manual - VFH-B 30/36/42 Series 2.2 Cooling Capacity Tables 7186 8391 9044 8474 6697 5228 6194 6818 7084 6779 6127 5175 C(70 1736 2108 2826 3099 2566 2172 C(59 85.3 81.2 78.3 79.9 98.9 8074 9106 9696 9149 7195 5631 6950 7474...
  • Page 10 Service Manual - VFH-B 30/36/42 Series 9560 10300 10400 9430 8045 6900 8662 8880 8900 8435 7750 6800 C(70 2010 2450 3120 3300 3075 2765 C(59 90.6 86.2 85.6 89.4 96.3 98.6 9795 11500 11265 10500 8820 7515 8805 9205 9485 9160 8365...
  • Page 11 Service Manual - VFH-B 30/36/42 Series 9675 10320 10700 9900 8640 6800 8720 8550 8510 8600 8000 6590 C(70 1980 2480 3650 3635 3600 2750 C(59 90.1 82.8 79.5 86.9 92.6 96.9 9840 11130 11295 10730 9915 7555 8615 9075 9155 9320 9065...

  • Page 12: Outline Dimension Diagram

    Service Manual - VFH-B 30/36/42 Series 3. Outline Dimension Diagram A-VFH30QB-1 14 37/64 36 7/32 38 27/64 17 21/64 A-VFH36QB-1 A-VFH42PB-1 14 1/4 42 1/2 17 21/64 24 13/16...

  • Page 13: Refrigerant System Diagram

    Service Manual - VFH-B 30/36/42 Series 4. Refrigerant System Diagram Schematic Diagram of Free Match Series Inverter Heat Pump System Heat Exchanger Eutectic Stopper Filter Four-way Valve Silencer/Muffler High Pressure Swicth Outdoor Uint Compressor Gas/Liquid Separator/Accumulator Electronic Expansion Valve Heating Cooling Indoor Uint Heat Exchanger...

  • Page 14: Electrical Part

    Service Manual - VFH-B 30/36/42 Series 5. Electrical Part 5.1 Wiring Diagram COMP 63624100019...
  • Page 15 Service Manual - VFH-B 30/36/42 Series...
  • Page 16 Service Manual - VFH-B 30/36/42 Series 5.2 PCB Printed Diagram 13 14...

  • Page 17: Function And Control

    Service Manual - VFH-B 30/36/42 Series 6. Function and Control 1.Function Control 1) Cooling mode other will adjust to the frequency according to demand. When each indoor unit stops the corresponding electronic first staged 3) Heating mode 4) Fan mode 2.Protection Function 2) Overload protection pipe...
  • Page 18 Service Manual - VFH-B 30/36/42 Series 3) High exhaust temperature protection discharge continuously can the 4) Communication malfunction 5) System high-pressure protection , system power must be manually turned off and back on. In this case, only by cutting off the power and then re-energizing can the compressor restart.

  • Page 19: Part : Installation And Maintenance

    Service Manual - VFH-B 30/36/42 Series Part : Installation and Maintenance 7. Safety Precautions Follow these instructions to complete Installation should be conducted by the installation work. dealer or qualified personnel. Please do Please read this manual carefully before not attempt to install the unit by yourself. unit startup and service.
  • Page 20 Service Manual - VFH-B 30/36/42 Series Main Tools for Installation and Maintenance 1. Level meter, measuring tape 2. Screw driver 3. Impact drill, drill head, electric drill 4. Electroprobe 5. Universal meter 6. Torque wrench, open-end wrench, inner hexagon spanner 7.

  • Page 21: Installation Manual

    Service Manual - VFH-B 30/36/42 Series 8. Installation Manual Installation procedures Start installation Preparation before installation Read the requirements select installation Prepare tools for electric connection location Select indoor unit Select outdoor unit installation location installation location Install wall-mounting Install the support of outdoor unit (select it according to the actual situation) frame, drill wall holes Connect pipes of indoor...
  • Page 22 Service Manual - VFH-B 30/36/42 Series 8.1 Preparation before Installation 8.1.1 Standard parts Comfort-Aire/Century Pars of Outdoor Unit Remark Quantity Namber name picture Owner’s manual Tube connector 30K:8;36K:8;42K:9 subassy 8.1.2 Selecting installation site that prevent from touching as possible...
  • Page 23 Service Manual - VFH-B 30/36/42 Series ＞39 3/8 ＞ 19 2/3 ＞78 3/4 ＞ 19 2/3 ＞78 3/4 unit:inch 8.1.3 Piping Connection Connecting Pipe ( inch ) M ax. Height D if f erence betw een M odel M ax. Pipe lengt h( ft I ndoor Un it and Outdoor Un it ( ft ) L iqu id When the outdoor unit is above maximum...
  • Page 24 Service Manual - VFH-B 30/36/42 Series 8.2 Installation Instruction 8.2.1 Outline and dimension of the outdoor unit 38 27/64 6 7/64 42 1/2 7 1/2 24 5/6...
  • Page 25 Service Manual - VFH-B 30/36/42 Series 8.2.2 Installation of the Connection Pipe ervice valve icks with insulation provided Pipe Pipe Flare Nut · 11.10~4.75 20.12~29.50 33.19~40.56 44.24~47.94 Spanner CAUTION! . During the connection of the indoor unit and the refrigerant pipe, never pull any joints of the indoor unit by force; otherwise the capillary pipe or other pipe may crack, which will result in leakage.
  • Page 26 Service Manual - VFH-B 30/36/42 Series less Model A-VFH30QB-1 A-VFH36QB-1 A-VFH36QB-1 Total Liquid Pipe 131.2ft 131.2ft 131.2ft Lenght (a+b+c+d+e) Allowable Value Fitting pipe A-VFH36QB-1 A-VFH30QB-1 A-VFH42QB-1 Total length (actual length) of fitting pipe (all indoor units) length of farthest fitting pipe(ft) Outdoor unit Height difference at upper...
  • Page 27 Service Manual - VFH-B 30/36/42 Series Insulation No gap 8.2.3 Air Purging and Refrigerant Charge Air purging to confirm fully with Gauge Gauge "HI"Knob "LO"Knob liquid valve Vacuuming pump Connection hose Gas valve Additional refrigerant charging indoor unit and the refrigerant pipe.
  • Page 28 Service Manual - VFH-B 30/36/42 Series Additional charges should not exceed 28.22 oz. 8.2.4 Electric Wiring electrical code and all local codes Use only dedicated If damaged with a comparable cord grounding ground disconnect switch coupled with the leakage current protection switch must be equipped, which is of enough capacity and of both magnetic and Recommended Cord(piecesx Capacity of the Circuit Breaker...
  • Page 29 Service Manual - VFH-B 30/36/42 Series Grounding grounding ground ground ground Natural some slack firmly d to wind Install Also, a leakage current protection switch must be installed ground lug...

  • Page 30: Troubleshooting

    Service Manual - VFH-B 30/36/42 Series 9. Troubleshooting 9.1 Malfunction Indicator...
  • Page 31 Service Manual - VFH-B 30/36/42 Series 9.2 Malfunction Checking and Elimination Malfunction display: E6 Communication malfunction Communication malfunction of some indoor units De-energize,check the connection wire of indoor and outdoor unit and the wire of the electric box is connected correctly Reconnect according to Connected correctly Eliminate the malfunction...
  • Page 32 Service Manual - VFH-B 30/36/42 Series All the indoor units appear communication malfunction De-energize,check the connection wire of indoor and outdoor unit and the wire of the eletric box is connected correctly Reconnect according to Eliminate the malfunction Connected correctly? the wiring diagram De-energize, check if the connection wire between the outdoor mainboard and the filter board...
  • Page 33 Service Manual - VFH-B 30/36/42 Series Malfunction display: E1 Compressor High Pressure Protection High pressure protection Replace the outdoor Check if the pressure is really high pressure with the Check if pressure switch unit mainboard is abnormal measurement of a manometer Replace pressure switch Refer to Instruction Check if operation mode of indoor unit is...
  • Page 34 Service Manual - VFH-B 30/36/42 Series Malfunction display: E4 Compressor Exhaust High Temperature Protection Discharge temperature protection Measure if compressor's Measure if temperature sensor’s Replace relevant discharge discharge temperature has resistance value is correct temperature sensor reached 239°F. System pipeline leaks so repair is needed. Please add Replace the outdoor refrigerant according to the amount specified in the unit mainboard...
  • Page 35 Service Manual - VFH-B 30/36/42 Series Malfunction display: F2 Failure of Evaporator Temp. Sensor Failure of condenser Temp sensor Check the direction of the plug and Check if the plug of the temperature sensor is correctly socket connected with socket on the mainboard Remove the sensor to check if the resistance value is ok Replace temperature sensor Replace main board of the indoor unit...
  • Page 36 Service Manual - VFH-B 30/36/42 Series Malfunction display: F3 Failure of Outdoor Ambient Sensor Failure of outdoor Ambient sensor Check the direction of the plug Check if the plug of the temperature sensor is correctly and socket connected with socket on the mainboard Remove the sensor to check if the resistance value is ok Replace temperature sensor Replace mainboard of the indoor uint...
  • Page 37 Service Manual - VFH-B 30/36/42 Series 9.3 Maintenance Method for Normal Malfunction 1. Air Conditioner Can't be Started Up does not emit Electric leakage for air After energization, room circuit breaker trips off conditioner at once correctly 2. Poor Cooling (Heating) for Air Conditioner 3.
  • Page 38 Service Manual - VFH-B 30/36/42 Series 4. ODU Fan Motor Can't Operate Replace the fan capacitor 5. Compressor Can't Operate see if 6. Air Conditioner is Leaking pipe 7. Abnormal Sound and Vibration ing the unit off or on Unit has "popping" sound ing the unit off or on, disappear after...

  • Page 39: Exploded View And Parts List

    Service Manual - VFH-B 30/36/42 Series 10. Exploded View and Parts List A-VFH30QB-1...
  • Page 40 Service Manual - VFH-B 30/36/42 Series 01255006P 26235401 01305043P 15702802 10335014 0143500401P 01473050 01305086P 765100047 01284100112P 00205200003 7651873215 76713066 00180030 030163000003 07210022 07334447 4304413222 07130239 07130239 01264100034 02204100008 0131410000901P 4304413234 4304413235 26115004 4304413237 07220016 07225017 43130186 01574100003 01244100003 76512008 01175092 4602000902 4300008201 04045200071...
  • Page 41 Service Manual - VFH-B 30/36/42 Series A-VFH36QB-1 A-VFH42PB-1 17 18 19 20 21 22 23 24 25 8 9 10 11 12 13 14 15 16...
  • Page 42 Service Manual - VFH-B 30/36/42 Series 01574106 01574106 02204100008 02204100008 01305508 01305508 01305065P 01305065P 20113003 20113003 01435007P 01435007P 10335010 10335010 1570280201 1570280201 01805200256 01805200256 765100047 765100047 43130186 43130186 00205200003 00205200003 7651873209 7651873209 76713066 76713066 26113009 26113009 00180030 00180030 70210051 70210051 4300876704 4304413222 07210022...

  • Page 43: Removal Procedure

    Service Manual - VFH-B 30/36/42 Series 11. Removal Procedure A-VFH30QB-1 recover Steps Procedure...
  • Page 44 Service Manual - VFH-B 30/36/42 Series Steps Procedure...
  • Page 45 Service Manual - VFH-B 30/36/42 Series Steps Procedure holding holding and then remove the motor holding...
  • Page 46 Service Manual - VFH-B 30/36/42 Series Steps Procedure...
  • Page 47 Service Manual - VFH-B 30/36/42 Series Steps Procedure holding holding...
  • Page 48 Service Manual - VFH-B 30/36/42 Series Steps Procedure...
  • Page 49 Service Manual - VFH-B 30/36/42 Series A-VFH36QB-1/A-VFH42PB-1 Steps Procedure...
  • Page 50 Service Manual - VFH-B 30/36/42 Series Steps Procedure...
  • Page 51 Service Manual - VFH-B 30/36/42 Series Steps Procedure holding holding holding...
  • Page 52 Service Manual - VFH-B 30/36/42 Series Steps Procedure holding away...
  • Page 53 Service Manual - VFH-B 30/36/42 Series Steps Procedure holding holding holding...
  • Page 54 Service Manual - VFH-B 30/36/42 Series Steps Procedure...

  • Page 55: Appendix

    Service Manual - VFH-B 30/36/42 Series Appendix: Appendix 1: Reference Sheet of Celsius and Fahrenheit Conversion formula for Fahrenheit degree and Celsius degree: Tf=Tcx1.8+32 Set temperature 60.8 69/70 69.8 78/79 78.8 62/63 62.6 71/72 71.6 80/81 80.6 64/65 64.4 73/74 73.4 82/83 82.4...
  • Page 56 Service Manual - VFH-B 30/36/42 Series Hard mold Note: Expander Pipe 0.051 0.028 0.063 0.039 0.071 0.039 0.095 0.087 Smooth surface flare flare Improper expanding damaged leaning crack uneven surface thickness The length is equal...
  • Page 57 Service Manual - VFH-B 30/36/42 Series Appendix 3: List of Resistance for Temperature Sensor Resistance Table of Ambient Temperature Sensor for Indoor and Outdoor(15K) 138.1 18.75 3.848 1.071 128.6 17.93 3.711 1.039 121.6 17.14 3.579 1.009 16.39 3.454 0.98 108.7 15.68 3.333 0.952...
  • Page 58 Service Manual - VFH-B 30/36/42 Series Resistance Table of Tube Temperature Sensors for Indoor and Outdoor (20K) 181.4 25.01 5.13 1.427 171.4 23.9 4.948 1.386 162.1 22.85 4.773 1.346 153.3 21.85 4.605 1.307 20.9 4.443 1.269 137.2 4.289 1.233 129.9 19.14 4.14 1.198...
  • Page 59 Service Manual - VFH-B 30/36/42 Series Resistance Table of Discharge Temperature Sensor for Outdoor(50K) 853.5 18.34 4.75 799.8 93.42 17.65 4.61 89.07 16.99 4.47 703.8 84.95 16.36 4.33 660.8 81.05 15.75 4.20 620.8 77.35 15.17 4.08 580.6 73.83 14.62 3.96 548.9 70.5 14.09...
  • Page 60 Service Manual - VFH-B 30/36/42 Series 1900 Wellworth Ave., Jackson, MI 49203 • Ph. 517-787-2100 • www.marsdelivers.com 7/2017...

This manual is also suitable for:

Comfort-aire century a-vfh30qb-1Comfort-aire century a-vfh36qb-1Comfort-aire century a-vfh42pb-1Comfort-aire century a-vfh42pb-1-cyComfort-aire century a-vfh36qb-1-cyComfort-aire century a-vfh30qb-1-cy

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