Inverter Flex Multi-Zone Ductless Mini Split
Contents
1. limit CHEN VOLLIMT1 VOLREL2 VOLLIMT2 VOLREL3 VOLLIMT3 Off Model VOLLIMT1 VOLLIMT2 VOLLIMT3 VOLREL1 VOLREL2 VOLREL3 VOLFRE1 VOLFRE2 A VMH18DC 1 230 200 120 260 210 135 62 54 A VMH27TC 1 245 220 120 265 240 135 78 45 A VMH36QC 1 200 185 120 210 195 135 54 42 Note if the low voltage protection occurs and does not resume within 3min it will keep the protection after the machine is restarted Heat Controller Inc VMH SERIES Service Manual 8 5 4 Compressor current limit protection If the compressor current exceeds the current limit value for 10 seconds the compressor frequency will be limited per the table below Cooling mode Current frequency Hz Current limit value A Frequency limit COOL_F10 ICOOLLMT6 The compressor frequency will decrease to COOL F4 and COOL F9 ICOOLLMTS then run at COOL for minutes COOL F8 ICOOLLMT4 After that the frequency will be adjusted according to the ICOOLLMT3 capacity demand then rise to the next level up every 3 COOL F6 ICOOLLMT2 minutes When the frequency gt COOL_F4 via capacity demand COOL_F5 ICOOLLMT1 If the current frequency is lower than COOL the frequency will not be limited After 10s of the compressor start if the current gt ICOOL the will display the failure for 30 seconds and stop AC will restart 3 minutes later and re check He2. Check the voltage of outdoor unit power supply whether the voltage Check the power supply between L L1 and N L2 is about 220 240VAC Yes Y Check whether the voltage of IPM board P and N is normal DC277 356V for 18 27KBtu h DC277 410V for 36KBtu h No Replace bridge rectifiers and then check whether the System can run normally Replace IPM board and then check whether the Yes System can run normally No Replace outdoor main board Trouble is solved Heat Controller Inc VMH SERIES Service Manual 9 3 2 3 Communication malfunction between IPM board and outdoor main board ODU E7 Communication malfunction between IPM board and outdoor main board Is there at least one LED in the IPM board lit No Check the signal wire between the IPM module and the main Yes board is it connected good No A Yes Reconnect and retry Is error still displaying No Y No Replace IPM board and then check whether the Yes system can run normally No Y Replace outdoor main board and then check Yes gt whether the system can run normally No v Y Replace UN control gt Trouble is solved Service Manual VMH SERIES Heat Controller Inc 9 3 2 4 Temperature protection of compressor discharge ODU P0 Temperature protecti
3. No Check whether the inductance of PFC module is good If the inductance is good the resistance of the two ports is 0 Yes No Replace the inductance Replace the PFC module 9 3 2 12 Inverter compressor drive protection ODU P7 The trouble shooting is same process as the IPM module protection trouble shooting Refer to this section Service Manual VMH SERIES Heat Controller Inc Appendix 1 Temperature Sensor Resistance Value Table Use appendix 4 to convert C to F c c c c 115266 20 126431 23574 10 062593 AT ES 0 56038 15 0 54448 793110 26 9504 66 1 89027 106 052912 745360 27 94245 67 18303 107 051426 704698 28 az 68 176647 108 0 49989 660898 29 83356 69 17047 109 048600 622756 30 omg 164601 047256 0 45957 563694 32 72944 72 15368 112 0 44699 522438 33 698142 73 148481 119 043482 493161 34 6635 143498 042304 46 5725 35 64001 75 1387005 15 041164 440000 36 6 1309 76 134105 0 40060 415878 37 587359 77 129078 0 38991 398239 562061 78 125425 0 37956 3719958 39 539009 79 121330 119 0 36954 352024 40 517519 117395 120 0 35982 33329 41 496392 119604 121
4. ICN18 CN14 MAIN BOARD 4 WAYS VALVE BLACK INDOOR PIPE OUT TEMP S RED RECTIFILER2 RECTIF ILERI RED BLUE ORANGE 1815 YELLOW p Lu FAN CAPACITOR CAPACITOR RED R1325 RED OPTIONAL HEATER Heat Controller Inc VMH SERIES Service Manual 4 3 A VMH36QC 1 202057190160 ELECTRONIC ELECTRONIC ELECTRONIC ELECTRONIC R EXPANSIVE EXPANSIVE EXPANSIVE EXPANSIVE GES COMPRESSOR VALVE VALVE D EAT COMPRESSOR TEMP PRO SWITCH s CN28 CN26 CN25 CN23 L VALVE A OUER VALVE C VALVE D RED RED BLACK YELLOW 14 1141202 SA IS VALVE MAIN BOARD TNDOOR PIPE OUT THPABCD RECTIFILER2 YELLOW BLUE CN 0110 ee YELLOW PFC MODULE FAN CAPACITOR YELLOW L ees Service Manual VMH SERIES Heat Controller Inc 5 Refrigeration Cycle Diagram 8 1 Refrigeration circuit drawing of inverter dual zone A VMH18DC 1 INDOOR OUTDOOR EXVA CAPILIARY A LIQUID VALVE A Sp lt AX CHECK VALVE EXV B CAPILIARY B 4 CSOT LIQUID VALVE A T8 THOUS Condenser temp sensor CAPILIARY TUBE HEAT HE
5. 30 30 Stand 60 60 8 4 2 Running mode Display Corresponding mode 0 Off 1 Cooling mode 2 Heating mode 8 4 3 Capacity demand Cooling mode Capacity 2000 2000 3000 4500 5000 5500 6100 7000 7500 gt 7500 2500 2500 3800 5000 5500 6100 7000 7500 8000 Corresponding 1 2 3 4 5 6 7 8 9 gt 10 Code Heating mode Capacity 2000 25 2000 25 3000 38 4500 50 5500 61 6100 70 6100 70 7000 75 7500 80 gt 8000 00 00 00 00 00 00 00 00 00 Corresponding 1 2 3 4 5 6 7 8 9 10 gt 11 Code Note The capacity is just for reference Service Manual VMH SERIES Heat Controller Inc 8 4 4Number of indoor units displays how many indoor units the outdoor unit is communicating with Display Quantity of indoor unit 1 1 2 2 3 3 4 4 8 4 5 Opening degree of electronic expansion valve Actual opening degree value equals the display data divided 8 8 5 Protection 8 5 1 Three minutes delay at restart for compressor 8 5 2 Temperature protection of compressor discharge When the compressor discharge temp is getting higher the running frequency will be limited as below rules If 216 F lt T5 lt 239 F 102 C lt T5 lt 115 C the frequency or the compressor will decrease to a lower level every 2 minutes until it reaches F1 If T5 gt 239 F T5 gt 115 C for 10 seconds the compressor will stop and restart till T5 lt 194 F T5 90 C 8 5 3 Low voltage protection VOLTAGE
6. Is the wiring between the low pressure protector and main control board connected correctly No j gt Reconnect it properly Yes Is the low pressure protector broken T Yes Short circuit the low pressure protector socket check whether the system can run normally now Replace low pressure protector Y Check whether the refrigerant system is ok Check whether the outdoor ambient gt es Stop the unit temperature is to low Y Check if there is a refrigerant leak onnect the pressure gauge Find the leak by charging nitrogen or refrigerant Yes the gauge joint of the system into the system if the leak is serious there will be check whether the pressure is distinct hissing sound if the leakage is small use a lower than 0 14MPa soap and water mixture or electronic leak detector to find the leak and repair No Y Evacuate the refrigerant then use Check whether the high pressure nitrogen or refrigerant refrigerant circuit is es to blow out pipe vacuum and blocked or not recharge with refrigerant again No Y Replace outdoor main board Service Manual VMH SERIES Heat Controller Inc 9 3 2 8 Current protection of compressor ODU P3 Current protection of compressor Check whether the input current of the power supply is more tha
7. LIQUID VALVE Ee 000007 CHECK VALVE I EXV C CAPILIARY C THOT LIQUID VALVE C T 4 A T3 000007 Condenser EXV D CAPILIARY D temp sensor LIQUID VALVE D in CAPILIARY TUBE o 7000007 HEAT geen EXCHANGE EVAPORATOR D Ti E EXCHANGE temp sensor temp sensor CONDENSER GAS VALVE A T2 Evaporator 0 temp sensor GAS VALVE B m Iu di L 8 NON 4 WAY VALVE GAS VALVE C gt EE COOLING GAS VALVE D m er In T5 Discharge 4 HEATING 2 Low pressure temp sensor switch Compressor Service Manual VMH SERIES Heat Controller Inc 6 Indoor units combination NOTE The total capacity of indoor air handlers can not exceed the nominal capacity of the outdoor unit The minimum quantity of indoor air handlers is one on any outdoor unit whether it is a dual tri or quad zone 6 1 Indoor unit combinations for A VMH18DC 1 Comb Combinations UnitA Unit B 9k Dual 1x1 12k 18 1 2 9k 9k 9k 12k 6 2Indoor unit combinations A VMH27TC 1 Comb Combinations UnitA UnitB UnitC 9 TRI 1 1 42k m 18k 9 9k TRI 1x2 12k 9 18k 12k 12k TRI 1x3 9 9k 9k 6 3Indoor unit combinations A VMH36QC 1 Comb
8. Liquid side Outdoor unit x Va is _ iml T aut H i Close Gas side E N 1 Three way valve N Manifold valve Close Compound meter as Ae g eJ amp 2 X TUA 0 1M 8579 E A y Handle Lo S Handle Hi d Charge hose 7 L Charge hose Vacuum lt B pump di T Vacuum pump 1 Completely tighten the flare nuts of the indoor and outdoor units confirm that both the 2 way and 3 way valves are set to the closed position Connect the charge hose with the push pin of handle lo to the 3 way valves gas service port Connect the charge hose of handle hi connection to the vacuum pump Fully open the handle Lo of the manifold valve Operate the vacuum pump to evacuate Conduct evacuation for 30 minutes and check whether the compound meter indicates 0 1Mpa If the meter does not indicate 0 1Mpa after pumping 30 minutes it should be pumped 20 minutes more If QE u SS Heat Controller Inc VMH SERIES Service Manual the pressure can t achieve 0 1Mpa after pumping 50 minutes please check if there are some leakage points Once the meter indicates 0 1mpa 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
9. 2 7771 UZ 7 Iw Cat FH HS N Outdoor a CS KL ZAH e 2 way valve 3 3 Open We 1 Check valve ar Z 3 way valve Charging cylinder 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 Because the refrigerant is R 410A turn the cylinder upside down such that the bottom is upward to ensure a liquid charge 2 Purge the air from the charge hose Open the valve at the bottom of the cylinder and press the check valve on the charge set to purge the air Do not vent refrigerant into the atmosphere 3 Put the charging cylinder onto the electronic scale and record the weight 4 Open the valves Low side on the charge set and charge the system with liquid refrigerant If the system cannot be charge with the specified amount of refrigerant or can be charged with a little at a time approximately 150g 50z each time operating the air conditioner the cooling cycle Wait approximately 1 minute and then repeat the procedure as needed 5 When the electronic scale displays the proper weight disconnect the charge hose from the 3 way valve s service port immediately If the system has been charged with liquid re
10. Remark If this part is abnormal the LED will not light Multi meter Result Forward Resistance Backward Resistance t Infinite Infinite 1 7M ohm Infinite r 1 7M ohm Infinite Heat Controller Inc VMH SERIES Appendix 4 CELCIUS TO FAHRENHEIT CONVERSION CHART 23 9 4 57 1346 58 136 4 5 22 7 6 21 5 8 4 140 _61 1418 62 1436 7 8 9 1382 60 63 145 4 64 147 2 65 149 66 150 8 67 1526 68 154 4 76 168 8 77 170 6 Service Manual VMH SERIES Heat Controller Inc Appendix 5 Spec Outdoor unit Model 1x2 1x3 1x4 Compressor DA130S1C 20FZ DA150S1C 20FZ TNB306FPGMC L Outdoor fan motor YDK70 6FB YDK70 6FB YDK180 8GB Indoor unit Model 9k Mini Split 12k Mini Split 18k Mini Split Indoor fan motor RPG20B RPG20B RPG28H Model 12k Cassette 18k Cassette Indoor fan motor YDK45 6B YDK45 6B 1 Compressor checking Measure the resistance value of each winding by using the tester Input Terminal Blue x Blue 1 F AN 1 Black Black 3 T Red Resistance Value DA130S1C 20FZ DA150S1C 20FZ TNB306FPGMC L Blue Red 0 950 20 C 0 950 20 C 0 530 20 C Heat Controller Inc VMH SERIES Service Manual 2 Fan Motor Measure the resistance value of each windi
11. compressor is connected correctly or tightly Yes Connect it well check ok or not No eplace the IPM module check whether the system can work normally No eplace the main board check whether the system can work normally No Replace the compressor Yes whether the system can work normally correct 220 240V 1PH 60Hz Yes No Check whether power supply line is connected correctl and tightly Connect it correctly and tightly check ok or not No No Check whether the wires in E part box are connected tightly Connect it tightly check ok or not Yes Check whether the bridge rectifiers are normal Use the multimeter to measure the resistance between each two terminals check whether the value of resistance is 0 H y Replace the bridge rectifiers Check whether the connecting line of every reactor is normal If the line is broken the resistance of the two ports is all models except A VMH36QC 1 Check whether the PFC module broken A VMH36QC 1 No Replace the connecting line or reactor or replace the PFC module for a A VMH36QC 1 Service Manual VMH SERIES Heat Controller Inc 9 3 2 10 High temperature protection of condenser ODU P6 When outdoor pipe temp is mroe than 149 F 65 C the unit wil
12. 0 35042 315035 42 476253 82 109958 122 03413 299058 43 457050 83 10648 42 0 33246 283459 44 438730 1 0300 14 0 32390 268778 45 421200 85 099855 125 031559 25494 46 404589 86 096681 126 0 30754 244932 47 388673 87 093602 127 029974 225002 48 373476 88 090753 128 029216 218094 49 3 58902 08790500 129 028482 9 207184 5 3407 90 08548 130 027770 0 27078 0 26408 13 0 25757 0 25125 15 0 24512 16 153418 56 273823 96 07044 136 023916 17 0 23338 18 139180 58 253973 98 066818 138 0276 19 132631 59 24607 99 064862 139 022231 SS N Jo o j a N Ke SECH GE 29 6 ER ME Nr 9 er 1 0220 ee 38 Ke Heat Controller Inc VMH SERIES Service Manual Appendix 2 Unit C K Discharge temp sensor table 20 542 7 20 68 66 60 13 59 100 3 702 19 511 9 21 65 62 61 13 11 101 3 595 18 483 22 62 73 62 12 65 102 3 492 17 455 9 23 59 98 63 12 21 103 3 392 16 430 5 24 57 37 64 11 79 104 3 296 15 406 7 25 54 89 65 11 38 105 3 203 14 384 3 26 52 53 66 10 99 106 3 113 13 363 3 27 50 28 67 10 61 107 3 025 12 343 6 28 48 14 68 10 25 108
13. 2 941 11 325 1 29 46 11 69 9 902 109 2 86 10 307 7 30 44 17 70 9 569 110 2 781 9 291 3 31 42 33 71 9 248 111 2 704 8 275 9 32 40 57 72 8 94 112 2 63 7 261 4 33 38 89 73 8 643 113 2 559 6 247 8 34 37 3 74 8 358 114 2 489 5 234 9 35 35 78 75 8 084 115 2 422 4 222 8 36 34 32 76 7 82 116 2 357 3 211 4 37 32 94 77 7 566 117 2 294 2 200 7 38 31 62 78 7 321 118 2 233 1 190 5 39 30 36 79 7 086 119 2 174 0 180 9 40 29 15 80 6 859 120 2 117 1 171 9 41 28 81 6 641 121 2 061 2 163 3 42 26 9 82 6 43 122 2 007 3 155 2 43 25 86 83 6 228 123 1 955 4 147 6 44 24 85 84 6 033 124 1 905 5 140 4 45 23 89 85 5 844 125 1 856 6 133 5 46 22 89 86 5 663 126 1 808 7 127 1 47 22 1 87 5 488 127 1 762 8 121 48 21 26 88 5 32 128 1 717 9 115 2 49 20 46 89 5 157 129 1 674 10 109 8 50 19 69 90 5 130 1 632 11 104 6 51 18 96 91 4 849 12 99 69 52 18 26 92 4 703 13 95 05 53 17 58 93 4 562 14 90 66 54 16 94 94 4 426 15 86 49 55 16 32 95 4 294 B 25 50 3950K 16 82 54 56 15 73 96 4 167 17 78 79 57 15 16 97 4 045 R 90 C 5KQ 3 18 75 24 58 14 62 98 3 927 19 71 86 59 14 09 99 3 812 Service Manual VMH SERIES Heat Controller Inc Appendix 3 1 Reference voltage data a Rectifier Input 220 230V AC output 310V DC b Inverter module 2 Check the Diode Bridge component In wiring diagram rectifier U V W 3ph Result U V 60 150V AC U W 60 150V AC V W 60 150V AC P N DC 310V
14. directly Otherwise No check whether the EEPROM chip plugged in PCB well Yes Replace the indoor EEPROM a read only memory chip whose contents can be erased and reprogrammed using a pulsed voltage EERROM chip may be solid for some models Service Manual VMH SERIES Heat Controller Inc 9 3 1 2 Indoor outdoor units communication error Power off then Power the by the Yes Breaker Did E1 error code turn off No Check wiring on the outdoor No and indoor terminal follow the wiring diagram Are all wires connected correctly Yes Turn indoor units with the remote controller Are no of outdoor units correct Refer to PIC 5 Reconnect the wiring Reconnect the wiring Measure Vs is it moving alternately between positive value and negative value Vs is the voltage between 5 12 Refer PIC 1 4 No all the wiring between terminal and Indoor PCB onnected ok Turn off the all indoor units Is IPM power LED amp On Refer PIC 3 change IPM Yes Change the Indoor PCB Is PFC power LED lamp off Refer PIC 3 Power on by remote controller has the E1 error code ended after 3 minutes No Reconnect the wiring Is Main board BB lamp on Refer PIC 4 Is the reactor connecting well Change Outdoor Main PCB Are number
15. of indoor units correct Check the outdoor check point 18 2 for dual zone 3 for tri zone 4 for qua zone Refer PIC 5 E1 error problem solved No second time SEEA Change outdoor unit PCB assembly include wiring totally Heat Controller Inc VMH SERIES Service Manual m 4 7 Au i Rectifier PFC board Make sure the wiring is correct d U Blue V Red W Black Service Manual VMH SERIES Heat Controller Inc 9 3 1 3 Zero crossing signal error Correct the connections Turn on the unit Check if the connections and No when the power supply is within 90 110 of power supply are normal rated voltage on unit s rating plate Yes Indoor PCB is defective Replace indoor PCB 9 3 1 4 Indoor fan speed has been of control DC fan motor Shut off the power supply and turn it on 5 seconds later Is it No The unit operates normally still displaying the error code Yes Shut off the power supply rotate the fan by hand Does it rotate freely with any rubbing obstructions Replace indoor fan motor Yes Check the wires of fan motor t th ti Are all the connections good EEN per wiring diagram Yes Check the voltage between port 1 and 6 of fan motor connector is it310V No Yes Replace indoor main Is it still di
16. 7 Turn the flare nut of the 3 way valves about 45 counterclockwise for 6 or 7seconds after the gas comes out then tighten the flare nut again Make sure the pressure display in the pressure indicator is a little higher than the atmospheric pressure Then remove the charge hose from the 3 way valve 8 Fully open the 2 way valve and 3 way valve and securely tighten the cap of the 3 way valve 2 Air purging by refrigerant Charging cylinder Procedure 1 Confirm that both the 2 way and 3 way valves are set to the closed position 2 Connect the charge set and a charging cylinder to the service port of the 3 way valve 3 Air purge by open the valves on the charging cylinder and the charge set Purge the air by loosening the flare nut on the 2 way valve approximately 45 for 3 seconds then closing it for 1 minute repeat 3 times After purging the air use a torque wrench to tighten the flare nut on the 2 way valve 4 Check for gas leakage by checking the flare connections using the soap water method 5 Discharge the refrigerant by closing the valve on the charging cylinder and discharging 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 hexaqonal wrench to operate the valve stems Service Manu
17. AT EXCHANGE t Pt Room d Ambient n EXCHANGE temp sensor CONDENSER T2 Evaporator GAS VALVE A temp sensor f Ze 1 AWAY VALVE _ Y GAS VALVE B 4 lt 2 Accumulator gt 075 Discharge Si p temp sensor Compressor COOLING HEATING 5 2 Refrigeration circuit drawing of inverter tri zone A VMH27TC 1 INDOOR OUTDOOR EXV A CAPILIARY A LIQUID VALVE A GE B CAPILIARY B LIQUID VALVE B T CHECK VALVE THUD 4 4060007 EXV C CAPILIARY C LIQUID VALVE C o Condenser 3 7000007 CAPILIARY TUBE p temp sensor HEAT m EXCHANGE T4 Ambient 0 EVAPORATOR Room CIP Sensor CONDENSER GAS VALVE A T2 temp sensor lt 4 ae i gt GAS M 4 WAY VALVE qe dk GAS VALVE C Accumulator gt nT5 Discharge lt temp sensor COOLING Compressor HEATING Heat Controller Inc VMH SERIES Service Manual 8 3 Refrigeration circuit drawing of inverter Quad zone A VMH36QC 1 INDOOR OUTDOOR CAPILIARY LIQUID VALVE A
18. Combinations Unit A Unit B Unit C Unit D 9k QUA 1x1 12k FEM 18k 9k 9k 9k 12k QUA 1x2 o 12 12 12k 18k 18k 18k 9k 9k 9k 9k 9k 12k QUA 1x3 9k 9k 18k 9k 12k 12k 12k 12k 12k QUA 1x4 9k 9k 9k 9k Heat Controller Inc VMH SERIES Service Manual 7 Installation Details 7 1 Wrench torque sheet for installation Outside diameter Torque Additional tightening torque mm inch N m N m 06 35 1 4 15 153kgf cm 16 163kgf cm 69 52 3 8 25 255kgf cm 26 265kgf cm 12 7 1 2 35 357kgf cm 36 367kgf cm 7 2 Connecting the cables The power wiring should always follow NEC and local codes with respect to the unit s rating plate See installation manual for additional information Main power connection is 208 230V 1PH 60HZ The communicating cable which connects between the indoor and outdoor units must meet all NEC and local codes with respect to the unit s rating plate We recommend using 14 4 conductor Stranded THHN 6 V cable Pipe length and elevation Pipesize size Standard Max Additional NE NN inch length Elevation refrigerant mm B m g m 3 8 69 52 1 4 66 35 10 15 20 12K 18K 1 2 12 7 1 4 66 35 16 5ft 33ft S0ft 0 2 oz ft Dual Dual zone m Quad zone m Max Total length for all rooms d 100ft 45 150ft 60 200
19. HEAT CONTROLLER INC SERVICE MANUAL Inverter Flex Multi Zone Ductless Mini Split Outdoor Section A VMH18DC 1 A VMH27TC 1 A VMH36QC 1 Heat Controller Inc e 1900 Wellworth Ave Jackson MI 49203 517 787 2100 www heatcontroller com Service Manual VMH SERIES Heat Controller Inc CONTENTS 1 General Information of Outdoor Units eee 3 DS I C 4 E E rie 5 4 Wiring DIRQram uu uuu ui aa a ai 6 5 Refrigeration Cycle Diagram 8 6 Indoor unit Combinations UU anna aaa anna anna 10 7 Installation Details ai U ia S 11 8 Electronic Control Function l 20 9 TFOUBDIESNOOUING EE 25 Heat Controller Inc VMH SERIES Service Manual 1 General information of Outdoor Units Model name Dimension mm in Compressor A VMH18DC 1 845x320x700 33 3x12 6x27 6 DA130S1C 20FZ 27 1 845 320 700 33 3 12 6 27 6 DA150S1C 20FZ A VMH36QC 1 990x345x965 39x13 6x38 TNB306FPGMC L Service Manual VMH SERIES Heat Controller Inc 2 Features Outdoor unit Power relay control Low noise air flow system Hydrophilic aluminum fin The hydrophilic fin is corrosion resistant and improves heating efficiency in heat mode by absorbing the water on its surface and by spreading the water in
20. Heat Controller Inc VMH SERIES Service Manual 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 Use a torque wrench to tighten the 3 way valves service port cap to a torque of 1 8 N m Be sure to check for gas leakage using soap water 7 Remove the defective indoor unit and install the new indoor unit Follow the next set of procedures to charge 2 Air purging by the refrigerant Charging cylinder Procedure 1 Confirm that both the 2 way and 3 way valves are set to the closed position 2 Connect the charge set and a charging cylinder to the service port of the 3 way valve Leave the valve on the charging cylinder closed 3 Air purging Open the valves on the charging cylinder and the charge set Purge the air by loosening the flare nut on the 2 way valve approximately 45 for 3 seconds then closing it for 1 minute repeat 3 times After purging the air use a torque wrench to tighten the flare nut on the 2 way valve 4 Check the gas leakage Check the flare connections for gas leakage using soap water 5 Discharge the refrigerant into charging cylinder Close the valve on the charging cylinder and discharge the refrigerant by loosening the flare nut on the Service Manual VMH SERIES Heat Controller Inc 2 way valve approximately 45 until the gauge indicates 0 3 to 0 5 Mpa 6 Disconn
21. Mini Split error code explanations Indoor Error Corresponding LED STATUS Code Outdoor Error code Indoor EEPROM malfunction E1 Indoor outdoor unit communication error E2 Zero crossing signal error E3 Indoor fan speed has been out of control Open circuit or short circuit of outdoor temperature sensor or outdoor EO E1 E2 E5 EEPROM malfunction 4 6 Open circuit short circuit of 1 2 temperature sensor P0 IPM module protection or IGBT over strong current protection P4 P1 Voltage protection E5 P2 Temperature protection of compressor top P0 P1 P2 P3 Outdoor temp too low protection Optional for some models P4 Inverter compressor drive protection P5 Mode conflict Indoor Ceiling Cassette error codes Operation De frost LED STATUS X Open or short circuit of T1 temperature sensor Open or short circuit of T2 temperature sensor Indoor outdoor units communication error Full water malfunction Indoor EEPROM malfunction IPM module protection Open or short circuit of T3 or T4 temperature sensor Voltage protection Temperature protection of compressor top ex x x x Mode conflict e x ANNER AER gt X x X gt x x x gt x x x gt Inverter compressor drive protection flash at 2 5Hz light X extinguished Service M
22. al VMH SE RIES Heat Controller Inc 9 3 2 6 High pressure protection ODU P1 Only for A VMH36QC 1 High pressure protection Is the wiring between the high pressure switch and main control board is No gt Reconnect it properly connected correctly Yes Is the high pressure protector broken T Yes Short circuit the high pressure protector socket Yes gt Replace high pressure protector check whether the system can run normally now 7 x Check whether the refrigerant system is ok Y Check whether the V outdoor ambient temperature is higher than 109 4 F 43 No Y Stop the unit Check whether the outdoor unit s airflow is obstructed Yes P Remove all obstructions for proper ventilation No Y Check whether the heat exchanger is dirty No Y Clean the heat exchanger Check whether the refrigerant circuit has a blockage d Yes gt Ie EOS Evacuate the refrigerant then use high pressure nitrogen or refrigerant to blow pipe vacuum and recharge with refrigerant again No Y Replace outdoor main board Heat Controller Inc VMH SERIES Service Manual 9 3 2 7 Low pressure protection ODU P2 Only for A VMH36QC 1 Low pressure protection
23. al VMH SERIES Heat Controller Inc 7 Replace the valve stems nuts and the service port cap that were previously removed Be sure to use a torque wrench to tighten the service port cap to a torque of 18N m Be sure to check for gas leakage using soap water 3 Adding the refrigerant if the pipe length gt 5m 16 5ft 3 DAN Indoor unit nz N Liquid side EET Outdoor uni N m 7 fe way vane J T E B Cas sio de G TN Ka bs 5 Q d E Charging cylinder 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 Because refrigerant is R410A turn the cylinder upside down ensuring the bottom is upward to create a liquid charge 2 Purge the air from the charge hose Open the valve at the bottom of the cylinder and press the check valve on the charge set to purge the air be careful of the liquid refrigerant 3 Put the charging cylinder onto the electronic scale and record the weight 4 Operate the air conditioner in the cooling mode 5 Open the valves Low side on the charge set and charge the system with the proper amount refer to table liquid refrigerant Heat Controller Inc VMH SERIES Service Manual 6 When the electronic scale displays
24. anual VMH SERIES Heat Controller Inc 9 2 Outdoor unit error code explanation Outdoor Corresponding Indoor Error LED STATUS Mini Split error code Code EO Outdoor EEPROM malfunction Indoor unit As coil outlet temp sensor or connector of sensor is defective Indoor unit B s coil outlet temp sensor or connector of sensor is defective Indoor unit C s coil outlet temp sensor or connector of sensor is defective Indoor unit D s coil outlet temp sensor or connector of sensor is defective Open or short circuit of outdoor unit temperature sensor Voltage protection Communication malfunction between IPM board and outdoor main board Temperature protection of compressor discharge or compressor top For A VMH 36QC 1 it means Temperature protection of compressor discharge High pressure protection Only for A VMH 36QC 1 Low pressure protection Only for A VMH 36QC 1 Current protection of compressor IPM module protection High temperature protection of condenser Inverter compressor drive protection PFC module protection A VMH36QC 1 Heat Controller Inc VMH SERIES Service Manual 9 3Trouble shooting 9 3 1 Indoor unit trouble shooting 9 3 1 1 Indoor EEPROM malfunction Shut off the power supply and turn it on 1 minute later Is it still displaying the error code Yes Ifthe EEPROM chip is welded on PCB replace the PCB
25. ating mode Current frequency Hz Current limit value A Frequency limit HEAT F12 IHEATLMT8 The compressor freguency will decrease HEAT F4 and then run at HEAT F4 for 3 minutes HEAT F11 IHEATLMT7 HEAT_F10 IHEATLMT6 After that the frequency will be adjusted according to the capacity demand then rise to the next level up every 3 IMEATEMTS minutes When the frequency gt Heat_F4 via capacity HEAT_F8 IHEATLMT4 demand HEAT_F7 IHEATLMT3 HEAT_F6 IHEATLMT2 HEAT_F5 IHEATLMT1 If the current frequency is lower than HEAT_F4 the frequency will not be limited After 10s of the compressor start if the current gt IHEAT the AC will display the failure for 30 seconds and stop AC will restart 3 minutes later and re check Service Manual VMH SERIES Heat Controller Inc 8 5 5 Indoor outdoor units communication protection If any indoor unit can not receive the feedback signal from the outdoor unit for 2 minutes the AC will stop and display the failure code 8 5 6 High condenser coil temp protection When T3 gt 149 F T3 gt 65 C for 3 seconds the compressor will stop while the indoor fan and outdoor fan will continue When T3 lt 126 F T3 lt 52 C the protection will release and the compressor will restart after 3 minutes 8 5 7 Outdoor unit anti freezing protection When T2B lt 32 F T2B lt 0 C for 4 minutes the indoor unit capacity demand will be zero and res
26. c VMH SERIES Service Manual discharge temp is 105 degree If the indoor unit is not connected the digital display tube will show 12 Inverter current AD data 13 EXV open angle for 1 indoor unit Actual data divide this number by 8 for actual angle valve is 14 EXV open angle for 2 indoor unit PE data divide 8 15 EXV open angle for 3 indoor unit 2 22 s S 16 EXV open angle for 4 indoor unit 17 Power supply of outdoor unit AD data AD data 472 255 actual data 18 Indoor unit number The indoor unit can communicate with outdoor unit well 19 The last error or protection code 00 means no malfunction 20 frequency value Actual data 21 Ambient temp of 1 indoor unit Actual data 22 Condenser pipe temp of 1 indoor unit Actual data 23 Ambient temp of 2 indoor unit Actual data 24 Condenser pipe temp of 2 indoor unit Actual data 25 Ambient temp of 3 indoor unit Actual data 26 Condenser pipe temp of 3 indoor unit Actual data 27 Ambient temp of 4 indoor unit Actual data 28 Condenser pipe temp of 4 indoor unit Actual data 29 Check point over The following items from 6 4 1 to 6 4 6 are for the explanation of the point check functions 8 4 1 Frequency of compressor Display Frequency of compressor Hz
27. ck the resistance value of the sensor via Appendix 1 is it normal No Yes Replace indoor or outdoor PCB Replace the sensor 9 3 1 7 Full water malfunction For Ceiling Cassette Is the water level switch is inserted well Re insert the water level switch well Yes Y Is the Wari Switch Yes Replace the water level switch is broken No v Is the water pump i SANG Water PUMPIS No Replace the water pump normal Yes Y Check PCB board or replace the indoor main PCB Heat Controller Inc VMH SERIES Service Manual 9 3 1 8 Outdoor temp too low protection Optional for some models Check if the outdoor ambient Turn on the unit when outdoor temperature is beyond the normal ambient temperature is in normal operation temperature range operation temperature range No Replace the outdoor ambient temperature sensor 9 3 2 Outdoor unit trouble shooting 9 3 2 1 Outdoor EEPROM malfunction ODU 0 Outdoor EEPROM malfunction If the EEPROM chip is welded on PCB replace the PCB directly Otherwise check whether the EEPROM chip plugged in PCB well Re insert the EEPROM well Replace the outdoor main board Service Manual VMH SERIES Heat Controller Inc 9 3 2 2 Voltage protection ODU E5 Voltage protection
28. e proper weight refer to the gauge and the pressure of the low Service Manual VMH SERIES Heat Controller Inc 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 Replace the valve stem caps and the service port that were previously removed Use torque wrench to tighten the service port cap to a torque 18N m Be sure to check for gas leakage using soap water 7 6 Replacing the indoor unit 1 Collecting the refrigerant into the outdoor unit co NI d Indoor unit YN NN Liquid sn Outdoor unit 3 SE gi 2 way ides 73 I oN Gas side N _ Z Close Procedure 1 Confirm that both the 2 way and 3 way valves are set to the open position Remove the valve stem caps and confirm that the valve stems are in the open position Be sure to use a hexagonal wrench to operate the valve stems 2 Connect the charge hose with the push pin of handle lo to the 3 way valves gas service port 3 Air purging of the charge hose Open the handle Lo valve of the manifold valve slightly to purge air from the charge hose for 5 seconds and then close it quickly 4 Set the 2 way valve to the closed position 5 Operate the air conditioner in the cooling cycle and stop it when the gauge indicates 0 1MPa 6 Set the 3 way valve to the closed position immediately
29. ect 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 7 Replace the valve stems nuts and the service port cap that were previously removed Be sure to use a torque wrench to tighten the service port cap to a torque 18N m Be sure to check the gas leakage using soap water 7 7 Replacing the outdoor unit 1 Evacuation for the whole system 6 Outdoor unit 2 vare N I N l 0 4 3 valve Ki Open i G 2 3 12 V Lk b J J Procedure 1 Confirm that both the 2 way and 3 way valves are set to the open position 2 Connect the vacuum pump to 3 way valve s service port 3 Evacuate for approximately one hour Confirm that the compound meter indicates 0 1Mpa 4 Close the valve Low side on the charge set turn off the vacuum pump and confirm that the gauge needle does not move approximately 5 minutes after turning off the vacuum pump 5 Disconnect the charge hose from the vacuum pump 6 Remove the defective outdoor unit and install the new unit See the following instructions for re charging the new unit Heat Controller Inc VMH SERIES Service Manual 2 Refrigerant charging TUZZZN Gas side d UE Indoor unit Liquid side
30. frigerant while operating the air conditioner turn off the air conditioner before disconnecting the hose 6 Replace the valve stem caps and the service port that were previously removed Use torque wrench to tighten the service port cap to a torque of 18N m Be sure to check for gas leakage using soap water Service Manual VMH SERIES Heat Controller Inc 8 Electronic control function 8 1 Abbreviations T1 Indoor ambient temperature T2 Coiltemperature of indoor heat exchanger middle T2B Coil temperature of indoor heat exchanger outlet T3 Coiltemperature of outdoor heat exchanger T4 Outdoor ambient temperature T5 Compressor discharge temperature Ts Setpointtemperature 8 2 Electric control working environment 8 2 1 Input voltage 230V 8 2 2 Input power frequency 60Hz 8 2 3 Indoor fan normal working amperage is less than 1A 8 2 4 Outdoor fan normal working amperage is less than 1 5A 8 2 5 Four way valve normal working amperage is less than 1A 8 2 6 Swing motor 12V DC 8 3 Outdoor unit s digital display There is a digital display tube in outdoor PCB Digital display functions In standby the LED displays e When compressor is operating the LED displays the running frequency e In defrosting mode The LED displays dF or alternatively displays between running frequency dF each displays 2s e n compressor pre heating The LED displays e n protection or malfunctio
31. ft Indoor unit Outdoor unit Oil trap 7 Outdoor unit Indoor unit NOTES e Capacity test is based on standard length and maximum allowance length is based on reliability Oil trap should be installed 3 5 meters 10 15ft Outdoor connections are 74 66 35 mm liquid 3 8 69 52 mm gas therefore a reducer is provided with all 12 18k indoor sections Service Manual VMH SERIES Heat Controller Inc 7 4 Installation for the first time Air and moisture in the refrigerant system have undesirable effects as indicated 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 Water may lead to corrosion of parts in the refrigerant system Therefore the indoor units and the pipes between indoor and outdoor units must be leak tested and evacuated to remove gas and moisture from the system Gas leak check Soap water method Apply soap water or a liquid neutral detergent on the indoor unit connections and outdoor unit connections with a soft brush to check for leakage on the connecting points of the piping If air bubbles come out the connections have leaks and those connection points must be tightened Recheck to ensure all leakage points are tightened properly and not leaking 1 Air purging with vacuum pump Indoor unit
32. l stop and will run again when outdoor pipe temp is less than 126 F 52 C High temperature protection of condenser Y Replace the temperature sensor No Check whether the condenser temperature is more than 149 F 65 C No Check whether the resistance of condenser temp sensor is correct Replace outdoor main board refer to the Appendix 1 Yes No Check whether the outdoor ambient temperature is higher than 122 F 50 C Yes gt Stop the unit T No Check whether the heat exchanger is dirty Yes gt Clean the heat exchanger No Y The refrigerant circuit is blocked Evacuate the refrigerant then use the Yes_ gt high pressure nitrogen or refrigerant to blow out the pipes vacuum and recharge the refrigerant again Heat Controller Inc VMH SERIES Service Manual 9 3 2 11 High PFC module protection ODU P6 Only for A VMH36QC 1 PFC module protecton Check whether connecting line between main board and the PFC No module is connected tightly Connect it tightly check normal or not Yes Check whether the voltage range of P N on IPM module is normal DC277 356V for 18 27KBtu h Yes Replace the outdoor main board DC277 410V for 36KBtu h
33. n 12 5 For 27K itis 14 5A For 36K it is 20A Yes Check whether the refrigerant system is ok Check whether the outdoor ambient temperature is higher than 122 4 F 50 No Y Check whether the outdoor unit s airflow is obstructed Stop the unit Yes Remove all obstructions for proper ventilation T No Y Check whether the heat N exchanger is dirty Yes gt Clean the heat exchanger No Y Evacuate the refrigerant then use high pressure nitrogen or refrigerant to blow pipe vacuum and recharge with refrigerant again Is the refrigerant circuit blocked Yes No Y Replace outdoor main board and check whether the system can run normally No Replace the electrical control box pou E EN d cC m Heat Controller Inc VMH SERIES Service Manual 9 3 2 9 IPM module compressor ODU P4 IPM module protection Check whether the voltage vc of P N on IPM module is normal Regulate it to correct then check Check whether the input power supply is No DC277 356V for 18 27KBtu h DC277 410V for 36KBtu h Yes Check whether the connecting line between main oard and the IPM module is connected tightly Yes No Connect it tightly check ok or not No Check whether the connecting line of the
34. n modes the LED displays the associated error code or protection code 8 4 Outdoor unit point check function There is a check switch in outdoor PCB Push the switch SW1 to check the states of unit when the unit is running The digital display will display the following each time the SW1 switch is preserved No SW1 Display Remark Pressed 1 Indoor unit capacity demand code 2 Outdoor unit running mode code Off 0 Cooling 1 Heating 2 3 Amendatory capacity demand code 4 Outdoor unit fan motor state Off 0 Low speed 1 High speed 2 5 Evaporator outlet temp for 1 indoor unit Actual data is measured however due to display limitations if the temp is lower than 9 degrees the digital display will 6 Evaporator Gulab temp E show 9 If the temp is higher than 70 degrees the digital 7 Evaporator outlet temp for 3 indoor unit display will show 70 If the indoor unit is not connected the 8 Evaporator outlet temp for 4 indoor unit digital display tube will show 9 Condenser pipe temp 10 Ambient temp 11 Compressor discharge temp Actual data is measured however due to display limitations if the temp is lower than 0 degrees the digital display will show 0 If the temp is higher than 99 degrees the digital display will show single digit and a tens digit For example if the digital display shows 0 5 it means the compressor Heat Controller In
35. ng by using the tester Ze N Ka Brown N lt 5 Blue CH LA 4 O ee Value YDK70 6FB 6FB YDK180 8GB 8GB YSK274G YSK68 4B 4B YDK45 6B 6B YSK25 6L 6L Rad 560 8 24 50 8 3170 8 1450 8 3450 8 6270 8 20 C 20 C 20 C 20 C 20 C 20 C M 760489 1904896 25204896 8804896 15004896 374 30 896 20 C 20 C 20 C 20 C 20 C 20 C 7604896 190 8 2520 8 880 8 1500 8 374 30 8 20 C 20 C 20 C 20 C 20 C 20 C Measure the resistance value of each winding by using the tester Input Terminal g s Red 1 Black 2 f White White See Soe TT me _ Design material performance data and components subject to change without notice HEAT CONTROLLER INC 1900 Wellworth Ave Jackson MI 49203 Ph 517 787 2100 Fax 517 787 9341 THE QUALITY LEADER IN CONDITIONING AIR www heatcontroller com 10 2012
36. on of compressor discharge Yes Stop leak and add refrigerant as needed compressor discharge temp fi tleak is more than 239 F 115 C Y Check whether the wiring connection is correct between compressor discharge temp No f Correct the wiring connection sensor and PCB according to wiring diagram Yes Y The discharge temp sensor may be broken Check whether the Check whether there is Check whether the resistance of compressor discharge temp sensor is right refer to the Appendix 2 Yes No Replace the compressor discharge temp sensor Replace outdoor main board Heat Controller Inc VMH SERIES Service Manual 9 3 2 5 Temperature protection of compressor top ODU P0 Temperature protection of compressor top Are all connections correct Does the compressor operate Yes Yes Is the unit properly No No Reconnect and retest charged Check whether protector is normal If protector is normal Replace the protector No resistance 0 v Properly charge the system Yes Y Y Replace the outdoor main PCB Is there any abnormality of operation after the system was charged No Y Check refrigerant circuit such as clogging of capillary tubes etc Service Manu
37. splaying the error code Y n The unit operates normally DC motor voltage input and output 5 NO Color Signal Voltage 4 1 Red 310V 6 2 I 3 white Vcc 15V 4 FG 0 3V 5 Yellow Vsp 0 7 5 1 3 6 Black GND ov Heat Controller Inc VMH SERIES Service Manual 9 3 1 5 Indoor fan speed has been out of control AC fan motor Shut off the power supply and turn it on 5 seconds later ls it still displaying the error code Yes Shut off The power supply rotate the cross fan by hand Does it rotate freely Yes Check wires of fan motor Are all the connections good Yes Y Check the resistance value of indoor fan motor is it normal No The unit operates normally Disassembly the No connection between fan and motor check if the bearing is normal No Replace the bearing Yes No Correct the connections per wiring diagram No Y Replace indoor fan motor A Yes Y Replace indoor PCB Service Manual VMH SERIES Heat Controller Inc 9 3 1 6 Open or short circuit of temperature sensor Check the connections between temperature sensor and PCB Are Correct the connections per the connections good wiringidiegram Yes Che
38. stead of forming water droplets 4 way valve control Operates only in heating mode except during defrosting Anti rust cabinet Valve protection cover It protects the valves and prevents water from dripping in the cabinet Discharge pipe temperature protection Compressor crankcase heater Heat Controller Inc VMH SERIES Service Manual 3 Dimensions mm in Model w D H W1 A B A VMH18DC 1 845 33 3 320 12 6 700 27 6 908 35 7 560 22 335 13 2 24 1 A VMH36QC 1 990 39 345 13 6 965 38 1075 42 3 624 24 6 366 14 4 Service Manual VMH SERIES Heat Controller Inc 4 Wiring Diagram 4 1 A VMH18DC 1 202057090103 ELECTRONIC ELECTRONIC EXPANSIVE EXPANSIVE COMPRESSOR VALVE A VALE B YELLOW CN28 BLACK VALVEA WUES RED YELLOW BLACK RED UR v Wo BLUE RED DISCHARGE SENSOR MAIN BOARD 4 WAYS VALVE u St e ac RED RECTIFILER2 RECTIFILERI RED Ne Ng TLNBLUE ORANGE YELLOW R1815 112691112 S oj p D FAN CAPACITOR CAPACITOR RD R1325 RED OPTIONAL HEATER 4 2 A VMH27TC 1 202057190114 ELECTRONIC ELECTRONIC ELECTRONIC EXPANSIVE EXPANSIVE EXPANSIVE COMPRESSOR VALVE VAVEB VAVEC YELLOW BLACK CN28 CN26 25 VALVE A IER YELLOW BLACK RED UR ws wg BLUE RED BLACK DISCHARGE SENSOR N21
39. 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 Replace the valve stem caps and the service port that were previously removed Use torque wrench to tighten the service port cap to a torque of 18N m Be sure to check for gas leakage using soap water 7 5 Adding the refrigerant due to loss of charge Indoor unit Liquid side X lt J 2 7 i Gas side U Ke Check valve Charging cylinder N A Electronic scale Procedure 1 Connect the charge hose to the 3 way service port open the 2 way valve and the 3 way valve Connect the charge hose to the valve at the bottom of the cylinder Because the refrigerant is R 410A turn the cylinder upside down such that the bottom is upward to ensure a liquid charge 2 Purge the air from the charge hose Open the valve at the bottom of the cylinder and press the check valve on the charge set to purge the air Do not vent refrigerant into the atmosphere 3 Put the charging cylinder onto the electronic scale and record the weight 4 Operate the air conditioner in the cooling mode 5 Open the valves Low side on the charge set and charge the system with liquid refrigerant refer to the gauge and the pressure of the low side 6 When the electronic scale displays th
40. ume to normal when T2B gt 50 F T2B gt 10 C 8 5 8 Oil return Running rules zag 1 If the compressor frequency remains lower than RECOILINFRE for 2hours the AC will increase the frequency to RECOILFRE for 3mins and then resume to the former frequency Model RECOILINFRE A VMH18DC 1 45 27 1 45 6 1 40 2 During the return process the indoor units continue with the current running mode the frequency will not be limited by the compressor discharge temp or the current 8 5 9 Compressor preheating functions Preheating permitting condition If T4 outdoor ambient temperature lt 37 4 F T4 lt 3 C and newly powered on or if TA 37 4 F T4 3 C and compressor has stopped for over 3 hours the compressor s crank case heater will begin to operate Preheating mode A weak current flow through the coil of compressor from the wiring terminal of compressor heats the compressor without it operating via the crankcase heater Preheating release condition If T4 gt 41 T4 gt 5 C or the compressor starts running preheating function will stop 8 5 10 Compressor crankcase heater When T4 lt 37 4 T4 lt 3 C and the compressor is not running the crankcase heater will be active When T4241 T425 C or the compressor starts up the crankcase heater will stop working Heat Controller Inc VMH SERIES Service Manual 9 Troubleshooting 9 1 Indoor
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