COMFORT-AIRE A-VFH30QB-1 Service Manual Download

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Service Manual -

VFH-B 30/36/42 Series

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1900 Wellworth Ave., Jackson, MI 49203 • Ph. 517-787-2100 • www.marsdelivers.com

Summary of Contents for A-VFH30QB-1

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 ...

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Page 3: ...nd Control 17 Part ė Installation and Maintenance 19 7 Safety Precautions 19 8 Installation Manual 21 3UHSDUDWLRQ EHIRUH QVWDOODWLRQ 22 QVWDOODWLRQ QVWUXFWLRQ 24 9 Troubleshooting 29 0DOIXQFWLRQ QGLFDWRU 30 0DOIXQFWLRQ KHFNLQJ DQG OLPLQDWLRQ 31 0DLQWHQDQFH 0HWKRG IRU 1RUPDO 0DOIXQFWLRQ 35 10 Exploded View and Parts List 39 11 Removal Procedure 43 Appendix 55 SSHQGL 5HIHUHQFH 6KHHW RI HOVLXV DQG DK...

Page 4: ...Service Manual VFH B 30 36 42 Series 4 1 Summary Part Ė Technical Information Outdoor Unit 9 4 9 4 9 4 ...

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Page 12: ...al VFH B 30 36 42 Series 12 A VFH36QB 1 A VFH42PB 1 A VFH30QB 1 8QLW LQFK 40 42 1 2 24 13 16 17 21 64 14 1 4 14 51 64 43 27 64 38 27 64 36 7 32 17 21 64 14 37 64 31 24 1523 32 8QLW LQFK 3 Outline Dimension Diagram ...

Page 13: ... go to the heat exchanger of the outdoor unit to exchange heat with the outdoor air and then is turned into refrigerant liquid After passing through the throttling device the temperature and pressure of the refrigerant liquid will further decrease and then go the main valve After that it will be divided and go to the heat exchanger of each indoor unit to exchange heat with the air which needs to b...

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Page 15: ...5 7521 81 7 1 225 5 725 1 7 5 2035 6625 1 57 57 57 57 57 57 1 57 57 57 57 57 57 57 57 6 7 9 9 7 7 7 7 7 1 1 1 1 1 1 7 57 57 57 57 7Ƚ 7 9 9 3 57 9 9 9 9 1 8 8 1 8 1 8 1 8 1 8 1 1 8 5 2 1 2 2 5 8 5 8 5 1 3 3 8 1 1 1 1 203 3 33 7 1 1 3 3 0 6 7 7 9 9 9 9 9 0 2 1 208 1 9 8 9 29 203 1 3 6 0 2 1 0 7 203 20321 17 326 7 21 5 0 7 7 7 7 3 7 LURQ VKHOO PRWRU RQO DSSOLHV WR WKH 1RWH 0RWRU JURXQG 9 4 9 3 7KHVH ...

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Page 18: ...WHP SUHVVXUH KLJKHU WKDQ OLPLW WKHQ WKH KLJK SUHVVXUH VZLWFK FXWV RII WKH V VWHP ZLOO VWRS E I KLJK SUHVVXUH SURWHFWLRQ LV GHWHFWHG 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 6 Compressor overload protection 1R PDWWHU WKH FRPSUHVVRU LV RQ RU RII ZKHQ WKH FRPSUHVVRU RYHUORDG VZLWFK LV GHWHFWHG DFW...

Page 19: ...HUDWLRQ PLJKW OHDG WR KXPDQ FDVXDOW RU VHYHU LQMXU WHPV QHHG WR EH IROORZHG W LQGLFDWHV WKDW LPSURSHU RSHUDWLRQ PLJKW OHDG WR SHUVRQDO LQMXU RU SURSHUW GDPDJH 7 Safety Precautions Installation should be conducted by dealer or qualified personnel Please do not attempt to install the unit by yourself Improper handling may result in water leakage electric shock or fire disaster etc Make sure the unit...

Page 20: ...tape 4 Electroprobe 7 Electronic leakage detector 10 Pipe pliers pipe cutter 2 Screw driver 5 Universal meter 8 Vacuum pump 11 Pipe expander pipe bender 3 Impact drill drill head electric drill 6 Torque wrench open end wrench inner hexagon spanner 9 Pressure meter 12 Soldering appliance refrigerant container ...

Page 21: ...the bound pipes pass through the wall hole and then connect outdoor unit Neaten the pipes Vacuum pumping and leakage detection Check after installation and test operation Finish installation Note this flow is only for reference please find the more detailed installation steps in this section Select outdoor unit installation location Install the support of outdoor unit select it according to the ac...

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Page 23: ...f pipe 0 5 1 0 mm bearing pressure 3 0MPa Ĺ The longer the connection pipe is the more cooling and heating capacity will decrease 19 2 3 39 3 8 78 3 4 19 2 3 19 2 3 19 2 3 78 3 4 unit inch M odel Connecting Pipe inch M ax Pipe length ft M ax Height Difference betw een Indoor Unit and Outdoor Unit ft Liquid Gas A VFH30QB 1 Ф 1 4 3 8 3 8 3 8 1 4 1 4 Φ 229 6 A VFH36QB 1 Ф Ф 246 1 246 1 A VFH42PB 1 Ф ...

Page 24: ...utdoor unit 9 4 2XWOLQH GLPHQVLRQ DQG 0RXQWLQJ KROHV 9 64 9 3 2XWOLQH GLPHQVLRQ DQG 0RXQWLQJ KROHV 31 13 25 32 3 21 64 14 39 64 15 23 32 16 51 64 11 3 4 24 38 27 64 6 7 64 43 27 64 17 23 32 3 37 64 11 7 64 17 21 64 14 13 64 42 1 2 24 5 6 7 1 2 LJ LJ 8 2 Installation Instruction ...

Page 25: ...WKH MRLQWV with insulation provided WKHQ WLJKWHQ WKHP ZLWK WKH SODVWLF WDSH CAUTION ķ 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 ĸ The refrigerant pipe should be supported by brackets Do not let the unit withstand the weight of the lineset Ĺ If ...

Page 26: ... A VFH36QB 1 A VFH36QB 1 131 2ft 131 2ft Allowable Value Fitting pipe Total length actual length of fitting pipe all indoor units length of farthest fitting pipe ft A VFH30QB 1 A VFH36QB 1 A VFH42QB 1 Outdoor unit at upper Outdoor unit at lower Height difference between indoor units ft Height difference between outdoor unit and indoor unit b a e d c L4 L3 L2 L5 L1 Outdoor uni t Height difference b...

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Page 31: ...ly N N N Connected correctly Reconnect according to the wiring diagram Y N Y De energize change the communication wire of the well communicated indoor unit and malfunction indoor unit then energize the unit and wait for 3min The malfunction indoor unit resumes normal Replace outdoor mainboard Replace the mainboard of the malfunction indoor unit Malfunction display E6 Communication malfunction 9 2 ...

Page 32: ...rrectly Connected correctly Reconnect according to the wiring diagram Connected correctly Reconnect according to the wiring diagram De energize check if the connection wire between the outdoor mainboard and the filter board according to the wiring diagram The connection wire is broken Replace the connection wire There is power input Replace the filter board of the outdoor unit Resume communication...

Page 33: ...he outdoor unit mainboard Replace pressure switch Check if operation mode of indoor unit is properly set N N Y Y Y Y Check if gas valve and liquid valve are completely open Refer to Instruction Manual of indoor unit Check if the panel of outdoor unit is firmly closed N N Completely open the valve Close the panel Check if the air return and supply from heat exchanger of indoor unit and outdoor unit...

Page 34: ...evant discharge temperature sensor Discharge temperature protection Malfunction display E5 Compressor Overheat N Y Y Y Y Y N N N Check if compressor s connection line is properly connected Adjust compressor s connection line Check if current value is higher than the protector s setting Replace overcurrent protector If unit s high pressure is normal l Refer to high pressure protection If voltage is...

Page 35: ...eck if the plug of the temperature sensor is correctly connected with socket on the mainboard N Removethe sensor to check if the resistance value is ok N Y Y Y Check the direction of the plug and socket Replace temperature sensor Failure of condenser Temp sensor Replace main board of the indoor unit ...

Page 36: ...ance value is ok Replace mainboard of the indoor uint Replace temperature sensor Check the direction of the plug and socket Malfunction display F5 Failure of Exhaust Temp Sensor N N Y Y Y Failure of Exhaust Temp sensor Check if the plug of the temperature sensor is correctly connected with socket on the mainboard Remove the sensor to check if the resistance value is ok Replace mainboard of the ind...

Page 37: ... 0DOIXQFWLRQ RI FRPSUHVVRU RPSUHVVRU FDQ W RSHUDWH 5HIHU WR SRLQW RI PDLQWHQDQFH PHWKRG IRU GHWDLOV 9 3 Maintenance Method for Normal Malfunction 1 Air Conditioner Can t be Started Up 2 Poor Cooling Heating for Air Conditioner 3 Horizontal Louver Can t Swing 3RVVLEOH DXVHV LVFULPLQDWLQJ 0HWKRG LU FRQGLWLRQHU 6WDWXV 7URXEOHVKRRWLQJ 1R SRZHU VXSSO RU SRRU FRQQHFWLRQ IRU SRZHU SOXJ IWHU HQHUJL DWLRQ ...

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