Heat Controller A-VMH18DC-1 manual

Heat Controller , Inc. • 1900 Wellworth A ve. • Jackson, MI 49203 • (517)787-2100 • www .heatcontroller .com SER VICE MANU AL Inverter Flex Multi-Zone Ductless Mini Split Outdoor Section A-VMH18DC-1 A-VMH27TC-1 A-VMH36QC-1[...]

2 Service Manual VMH SerieS Heat Controller , Inc. CONTENTS 1.General Information of Outdoor Units ........................................................... 3 2. Features........................................................................................................... 4 3. Dimensions ......................................................[...]

3 Heat Controller , Inc. VMH SerieS Ser vice Manual 2 1. Genera l infor mation of Outdoor U nits Model name Dimension mm ( in) Compressor A- VMH18DC -1 845x320x 700(33.3 x 12.6 x 27.6) DA130S1C - 20FZ A- VMH27T C -1 845x320x 700(33.3 x 12.6 x 27.6) DA150S1C - 20FZ A- VMH36Q C -1 990x345x 965(39x13.6 x 38) TNB306FP GMC -L[...]

4 Service Manual VMH SerieS Heat Controller , Inc. 3 2 ． Featur es The hydr ophilic fi n is corrosio n resi stant and improves heatin g ef ficiency i n heat mode by a bsorbing the w ater on its surface and by spreading th e water instead of f orming water drop lets. Operates on ly in heating mode ex c ept dur ing d efrostin g. Compressor cr ankca[...]

5 Heat Controller , Inc. VMH SerieS Ser vice Manual 4 3. Dimensi ons m m(i n) 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) A- V MH24 TC -1 A- VMH36Q C -1 990 ( 39) 345 ( 13.6 ) 965 ( 38 ) 1075 ( 42.3 ) 624 ( 24.6 ) 366 ( 1 4.4 )[...]

6 Service Manual VMH SerieS Heat Controller , Inc. 5 4. Wiring Dia gram 4.1 A- VMH1 8DC -1 4.2 A - VM H27TC -1[...]

7 Heat Controller , Inc. VMH SerieS Ser vice Manual 6 4. 3 A- VM H3 6QC -1[...]

8 Service Manual VMH SerieS Heat Controller , Inc. 7 5. Ref rige ratio n C y cle Di agram 8.1 Refrigeration circuit drawing of inverter dual z one : A - VMH 18DC -1 LIQUID VALVE A GAS VALVE A HEAT EXCHANGE (EVAPORATOR) HEAT EXCHANGE (CONDENSER) Compressor 4-WAY VALVE COOLING HEATING T2 Evaporator temp. sensor T1 Room temp. sensor T3 Condenser temp.[...]

9 Heat Controller , Inc. VMH SerieS Ser vice Manual 8 8.3 Refrigeration cir cuit dr awing of inv erter Q ua d-zone : A - VMH36QC -1 LIQUID VALVE A GAS VALVE A HEAT EXCHANGE (EVAPORATOR) HEAT EXCHANGE (CONDENSER) Compressor 4-WAY VALVE COOLING HEATING T2 Evaporator temp. sensor T1 Room temp. sensor T3 Condenser temp. sensor T5 Discharge temp. sensor[...]

10 Service Manual VMH SerieS Heat Controller , Inc. 9 6. Indoor units combinati on NOTE: Th e tot al cap acity of indoor air h andlers c an not exce ed the nominal ca pacity of the out door unit. The minimum qua ntity of indoor air handlers is o ne on any out door unit, whet her it is a dual, tri, or quad zone. 6.1 I ndoor unit combination s for A-[...]

11 Heat Controller , Inc. VMH SerieS Ser vice Manual 10 7. Installat ion D etail s 7 .1 Wren ch torque sh e e t for installati on Outside dia meter T orque Add itional t ightening t orque mm in ch N . m N . m Ф6.35 1/4 15(1 53kgf .cm ) 16( 163k gf.cm ) Ф9.52 3/8 25( 255kgf .cm ) 26 ( 265k gf.cm ) Ф12.7 1/2 35 (357k gf.cm ) 36 (367kgf .cm ) 7 .2 [...]

12 Service Manual VMH SerieS Heat Controller , Inc. 11 7.4 Installati on for the first tim e Air and moist ure in the r efrigerant system have undesira ble ef fects as indic ated below: ● Pressure in the sy stem rises. ● Operating cur rent ris es. ● Coo ling or he ating ef ficiency dr ops. ● Moisture in t he refrig erant circu it may freeze[...]

13 Heat Controller , Inc. VMH SerieS Ser vice Manual 12 the pressur e can’ t achie v e - 0.1Mp a afte r pumpi ng 50 minutes , p lease check if th ere are some lea kage points . Once the meter indicate s - 0.1 mpa , f ully cl ose the handle Lo valv e of the manifold v alve and sto p the operat ion of the vacu um pump. Confirm that the gauge n eedl[...]

14 Service Manual VMH SerieS Heat Controller , Inc. 13 7). Re place the valve stems nut s and the service p ort cap that were pr eviousl y removed . Be sure to use a t orque w rench to tighte n the service port cap t o a torque of 18N · m. Be sure to chec k f or gas lea kage using s oap wat er . 3. Adding t he refri gerant if the pipe lengt h >[...]

15 Heat Controller , Inc. VMH SerieS Ser vice Manual 14 6). W hen the elect ronic scale disp l ay s the proper weight ( refer to the table ), d isconnect the charge hose from the 3 - way valve’s serv ice port immediately and turn off the air conditioner before di sconnecting the hose. 7). Re place the valve stem cap s and the service po rt that w[...]

16 Service Manual VMH SerieS Heat Controller , Inc. 15 side), disco nnect the charge hos e f r om the 3 - way valve’s ser vice por t immediately and t urn of f the ai r conditioner before d isconnect i n g the hose. 7). Re place the valve stem cap s and the service p ort that w ere previously removed. Use torque w rench to t i ght en the service [...]

17 Heat Controller , Inc. VMH SerieS Ser vice Manual 16 Do this quic kl y so that the gauge ends up i ndicating 0.3 to 0. 5Mpa. Disconnect t he charge set, and t ighten the 2 - way and 3 - way v al v e’s stem nuts. Use a torque w rench to t i g hten the 3 - way v al v es service port cap to a torque o f 1.8 N .m. Be sure to ch eck for gas leaka g[...]

18 Service Manual VMH SerieS Heat Controller , Inc. 17 2- way v alve approximately 45° until the gauge ind icates 0.3 t o 0.5 Mpa. 6). Discon nect the charge set and the charging c ylin der , and s et the 2 - w ay and 3 - way v alves to the open position Be sure to use a hex agonal wrench to o perate the valve ste m s. 7). Re place the valve stems[...]

19 Heat Controller , Inc. VMH SerieS Ser vice Manual 18 2. Refrigera nt charging Proced ure: 1). Connect the charge ho se to the charging cyl inder , open the 2 - way v alve and the 3 - way va lve Connect the charge hose w hich you dis connected from t he vacuum pump t o the v alve at the botto m o f the cylinder . Because t he refrigerant is R - 4[...]

20 Service Manual VMH SerieS Heat Controller , Inc. 8. Electronic control func tion 8 .1 A bbre v iation s T1: Indoor ambie nt temperature T2: Coil temperat ure of indoor heat exch anger middle. T2B : Coil t emperat ure of indoor h eat exchanger out let . T3: Coil temperat ure of outd o or heat exchanger T4: Out door ambient temperature T5: Compres[...]

21 Heat Controller , Inc. VMH SerieS Ser vice Manual discharge te mp. is 105 degree . If the indoor unit is not connected, t he digital display tube w ill show: “ - - “. 12 Inverter c urrent AD data 13 EXV open ang le for 1# indoor unit Actual data, divide t his number by 8 for a ctual angle valv e is open. 14 EX V open angle for 2# indoor unit[...]

22 Service Manual VMH SerieS Heat Controller , Inc. 8.4 .4Nu m ber o f i n door unit s – disp l ay s how many indoor un i t s the out door unit is communicating w i t h. Dis play Qu antity of indoor u nit 1 1 2 2 3 3 4 4 8.4.5 Open i ng d egree of electron ic expa nsion valve: Ac tual o pe ning d egree val ue equals th e display data divided 8 8.[...]

23 Heat Controller , Inc. VMH SerieS Ser vice Manual 8 .5.4 Compressor current limit protecti on If the com pressor c urrent exceeds the current limit value for 10 sec onds, t he co mpressor f requ ency will be limited per t he ta ble below . Cooli ng mod e: Current frequency(Hz) Current limit value(A) Frequency limit COOL_F10 ICOOLLMT6 The compres[...]

24 Service Manual VMH SerieS Heat Controller , Inc. 8 .5.5 Indoor / outdo or unit s communi cation pr otec tion If any indoor unit can not receive the fee dback signal from the out door unit fo r 2 minutes, the AC wi ll sto p and display the failure code . 8 .5.6 Hi gh c ondense r coil temp. protect ion. W hen T3>149 °F (T3 > 65 ° C) for 3 [...]

25 Heat Controller , Inc. VMH SerieS Ser vice Manual 9. T r oubleshooti ng 9.1 Indoor M ini -S plit er ror cod e explan ation s: Indoor Err or Code LED ST A TUS Cor respondi ng Outdoor Err or c o de E0 Indoor EEPROM malfunction —— E1 Indoor / out d oor uni t communi cation error —— E2 Zero- crossing signal error —— E3 Indoor fan speed h[...]

26 Service Manual VMH SerieS Heat Controller , Inc. 9.2 Out door uni t error code ex pl a nation: Out door Error Code: LED ST A TUS Corresponding Indo or Mini - Split error code E0 Outdoor EEPROM m alfu nction E5 E1 Indoor un it A ’s coil outlet te mp. sensor or connector of se nsor is defecti ve E5 E2 Indoor unit B’ s coil outlet temp. sensor [...]

27 Heat Controller , Inc. VMH SerieS Ser vice Manual 9.3 T rouble s hootin g 9.3.1 Indoor uni t trouble sho oting 9.3.1.1 Indoor EEPRO M malfunct ion If the EEPROM chip is welded on PCB, replace the PCB directly. Otherwise, check whether the EEPROM chip plugged in PCB well? Yes No Yes Insert the EEPROM well Replace the indoor PCB. Shut off the powe[...]

28 Service Manual VMH SerieS Heat Controller , Inc. 9.3.1.2 I ndoor / out door unit s communi cation err or No No , fist time Ye s Ye s No Rec onnec t the wiring Check w iring on the outdoor and indoor ter minal follow t he w iring diagram. Are all w ires co nnect ed corre c t ly? T urn on all in door unit s wi t h the r emote cont roller. Are no. [...]

29 Heat Controller , Inc. VMH SerieS Ser vice Manual PIC 2, Che ck the wir ing. PIC4: M ain board LED when pow er on and unit st andby . PIC 5: chec k point bott om, press 18 tim es to check how many indo or units are connected. Pic 1: M eas ur e the v oltage of L2 t o S (Vs) , is it moving alter nately between posit ive value a nd negative v alue [...]

30 Service Manual VMH SerieS Heat Controller , Inc. 9.3.1.3 Ze ro - crossing signal err or Check if the connections and power supply is normal? Correct the connections. Turn on the unit when the power supply is good. No Yes Indoor PCB is defective. Replace indoor PCB. 9.3.1.4 Indoor fan s peed has been out of co ntrol (DC fan m otor ) Shut off the [...]

31 Heat Controller , Inc. VMH SerieS Ser vice Manual 9.3.1.5 Indoor fan s peed h as b een out of control (AC fan motor) Shut off the power supply and turn it on 5 seconds later.Is it still displaying the error code? Shut off the power supply , rotate the cross fan by hand . Does it rotate properly? The unit operates normally. Disassembly the connec[...]

32 Service Manual VMH SerieS Heat Controller , Inc. 9.3.1. 6 O pen or short circuit of temperat ure sen sor . Check the connections between temperature sensor and PCB. Are the connections good? Correct the connections. No Yes Yes Replace indoor or outdoor PCB. Replace the sensor and check if the problem happen again? C heck the resistance value of [...]

33 Heat Controller , Inc. VMH SerieS Ser vice Manual 9.3.1. 6 O pen or short circuit of temperat ure sen sor . Check the connections between temperature sensor and PCB. Are the connections good? Correct the connections. No Yes Yes Replace indoor or outdoor PCB. Replace the sensor and check if the problem happen again? C heck the resistance value of[...]

34 Service Manual VMH SerieS Heat Controller , Inc. 9.3.2.2 V olt age protect ion (ODU E5 ) Voltage protection Check the voltage of outdoor unit power supply, whether the voltage between L(L1) and N (L2) is about 220~240VAC Check the power supply Check whether the voltage of IPM board P and N is normal? DC277-356V for 18-27KBtu/h; DC277-410V for 36[...]

35 Heat Controller , Inc. VMH SerieS Ser vice Manual 9.3.2.3 Commu nicatio n malfunct ion betwee n IPM boar d and out door ma in board (ODU E7) Communication malfunction between IPM board and outdoor main board Is there at least one LED in the IPM board light? Check the signal wire between the IPM module and the main board, is it connected good? Re[...]

36 Service Manual VMH SerieS Heat Controller , Inc. 9.3.2.4 T emperature protection of compressor discharge (ODU P0) T emperature protection of compressor discharge Check whether the compressor discharge temp. is more than 239°F (1 15°C)? Check whether there is a refrigerant leak Ye s No Check whether the resistance of compressor discharge temp. [...]

37 Heat Controller , Inc. VMH SerieS Ser vice Manual 9.3.2.5 T emperature protection of compressor top (ODU P0) T emperature protection of compressor top Check refrigerant circuit, such as clogging of capillary tubes etc. Properly charge the system Replace the outdoor main PCB Replace the protector . Reconnect and retest. Are all connections correc[...]

38 Service Manual VMH SerieS Heat Controller , Inc. 9.3.2.6 High pressure protection (ODU P1) (Only for A-VMH36QC-1) Replace outdoor main board Evacuate the refrigerant, then use high pressure nitrogen or refrigerant to blow pipe, vacuum and recharge with refrigerant again Clean the heat exchanger Remove all obstructions for proper ventilation Stop[...]

39 Heat Controller , Inc. VMH SerieS Ser vice Manual 9.3.2.7 Low pressure protection (ODU P2) (Only for A-VMH36QC-1) Replace outdoor main board Evacuate the refrigerant, then use high pressure nitrogen or refrigerant to blow out pipe, vacuum and recharge with refrigerant again Find the leak by charging nitrogen or refrigerant into the system, if th[...]

40 Service Manual VMH SerieS Heat Controller , Inc. 9.3.2.8 Current protection of compressor (ODU P3) Replace the electrical control box Evacuate the refrigerant, then use high pressure nitrogen or refrigerant to blow pipe, vacuum and recharge with refrigerant again Clean the heat exchanger Remove all obstructions for proper ventilation Stop the un[...]

41 Heat Controller , Inc. VMH SerieS Ser vice Manual Ye s 9.3.2.9 IPM module compressor (ODU P4) IPM module protection Replace the connecting line or reactor or replace the PFC module for a A-VMH36QC-1 Check whether the voltage range of P-N on IPM module is normal? DC277-356V for 18-27KBtu/h; DC277-410V for 36KBtu/h Replace the bridge rectiers Y[...]

42 Service Manual VMH SerieS Heat Controller , Inc. Replace the temperature sensor Replace outdoor main board High temperature protection of condenser Evacuate the refrigerant, then use the high pressure nitrogen or refrigerant to blow out the pipes, vacuum and recharge the refrigerant again Clean the heat exchanger Stop the unit Check whether the [...]

43 Heat Controller , Inc. VMH SerieS Ser vice Manual 9.3.2.1 1 High PFC module protection (ODU P6) (Only for A-VMH36QC-1) 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. PFC module protecton Replace the outdoor main board Replace the i[...]

44 Service Manual VMH SerieS Heat Controller , Inc. Appe ndix 1 T e mperature Sen sor Resist ance V alue T able ( ℃ -- K) Use appen di x 4 t o convert ° C to ° F. ℃ K Ohm ℃ K Ohm ℃ K Ohm ℃ K Ohm - 20 115.266 20 12.6431 60 2.35774 100 0.62973 - 19 108.146 21 12.0561 61 2.27249 101 0.61148 - 18 101.517 22 11.5000 62 2.19073 102 0.59386 - [...]

45 Heat Controller , Inc. VMH SerieS Ser vice Manual Appendi x 2 Unit: °C --- K D ischarge t emp. sensor t able - 20 542.7 20 68.66 60 13.59 100 3.702 - 19 51 1.9 21 65.62 61 13.1 1 101 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 1 1.79 104 3.296 - 15 406.7 25 54.89 65 1 1.38 105 3.203 -[...]

46 Service Manual VMH SerieS Heat Controller , Inc. Appendi x 3 1. Referen ce volt age data: a) Rectifier : Input :220 - 230V( AC), outp ut :310V( DC) b) Inver ter module: U,V , W 3ph. Result U-V 60 -1 50V( AC ) U -W 60 - 150V(AC) V- W 60 - 150V( AC ) P-N DC 310V 2. Check the D i od e Bridge compon ent ( In wiring diagr am, rect ifier) Remar k : I [...]

47 Heat Controller , Inc. VMH SerieS Ser vice Manual Appendi x 4:[...]

48 Service Manual VMH SerieS Heat Controller , Inc. Appendi x 5: S pec. Outdoor u nit Model 1x2 1x3 1x4 Compress or DA130S 1C - 20FZ DA150S1C - 20FZ TNB306FPGM C -L Outdoor fan motor YD K70 - 6FB YDK70 - 6FB YD K180 - 8 GB Indoor unit Model 9k Min i - S plit 12k Min i - S plit 18k Min i - S plit In door fan motor RPG20B RPG20B RP G28H Model / 12k C[...]

49 Heat Controller , Inc. VMH SerieS Ser vice Manual 2. Fan M otor . Measure the r esistance value of ea ch winding by u sing the t ester . Position Resist ance V alue YDK7 0 - 6FB YDK180 - 8GB YSK27- 4G YSK68- 4B YDK4 5 - 6B YSK25- 6L Bla ck - Red 56 Ω ±8% (20 ℃ ) 24.5 Ω ±8% (20 ℃ ) 317 Ω ±8% (20 ℃ ) 145 Ω ±8% (20 ℃ ) 345 Ω ±8% ([...]

04/2009 10 -2012[...]