Inverter Single Zone Ductless Mini Split Heat Pump
Contents
1. Capacity Pipe Size Standard Max Total Additional Btu h Gas Liquid Length Elevation B Line Length ft Y Refrigerant in in ft ft Min Max oz ft 9k 3 8 1 4 16 5 26 10 65 5 2 12k 1 2 1 4 16 5 26 10 65 5 2 18k 1 2 1 4 16 5 32 10 82 2 24k 5 8 3 8 16 5 32 10 82 4 Refrigerant Charge 0z Unit Model Heat Pump VMH09SC 38 8 oz VMHI2SC 44 1 oz VMH18SC 58 2 oz VMH24SC 67 0 oz Unit charge located on rating plate includes enough refrigerant for 16 5 feet of line set Charge adjustment is not required on line set lengths less than 16 5 feet Capacity is based on standard line set lengths and maximum length is based on reliability Indoor unit Outdoor unit Outdoor unit Oil Traps It is not necessary to install oil traps when outdoor unit is located lower than indoor unit It is recommended that a trap be installed when outdoor unit is installed 16 5 higher than indoor unit Heat Controller Inc VMH SERIES Service Manual 6 3 Pressure Test amp Evacuation Air and moisture in the refrigerant system have undesirable effects as 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 Refrigerant lines and indoor coil should be evacuated using the recommended deep vacuum method of 500 microns The alternate triple evacuation method may b2. 20 C can Blue 4 5 Orange Red Yellow b Red Heat Controller Inc VMH SERIES Service Manual 8 3 1 Compressor checking Model DA150S1C 20FZ Measure the resistance value of each winding by using the multi meter Input Terminal Blue BN Resistance Blue 4 gt Value Red 2 e MP Blue Red 0 950 Black 3 lud Blue Black 20 C Red Blue Outdoor Fan Motor Model YDK53 6FB Measure the resistance value of each winding by using the multi meter Input Terminal ve Pen Resistance Yellow Value Red Blue Black Black Red 560 20 C Brown Outdoor Fan Motor Model YDK53 6NB Measure the resistance value of each winding by using the multi meter Input Terminal Blue D Brown Resistance EC Yellow Red Blue Black Black Red 56 50 5650200 Brown Red Yellow 117 50 20 C Service Manual VMH SERIES Heat Controller Inc Room temp T1 sensor Indoor coil temp T2 sensor Outdoor coil temp T3 sensor Outdoor ambient temp T4 sensor Compressor exhaust temp Te sensor Measure the resistance value of each winding by using the multi meter Some frequently used R T data for Te sensor Temperature 0 F 41 F 5 C 59 F 15 C 77 F 25 C 95 F 35 C 140 F 60 C 158 F 70 C 176 F 80 C 194 F 90 C 212 F 100 C 36 6 Resistance Value 141 6 88 56 1 KQ Some frequently used R T
3. if T1 Ts lt 28 F 2 C compressor will stop Meanwhile the compressor running frequency is limited by the current Current A Compressor Off I3COOL Frequency decreases I2COOL Frequency holds I1COOL Normal operation U If the current increases more than I2COOL the frequency will decrease automatically if the current raises to over ISCOOL the compressor will stop and restart 3min later When the frequency decreases and the current deceases to between I1 COOL and I2COOL the frequency will hold If the frequency does not change for 3min the frequency will increase to a higher level and it can increase twice at most If the current deceases to lower than I1COOL the frequency limit will be invalid Model Current I1COOL I2COOL I3COOL VMHO09SC 1 5 2 6 4 7 5 VMH12SC 1 5 2 6 4 7 5 VMH18SC 1 5 2 6 4 7 5 VMH24SC 1 10 11 13 Service Manual VMH SERIES Heat Controller Inc 8 4 2 2 Outdoor fan rules Outdoor fan and compressor start at the same time outdoor fan stops 30s after the compressor stops The outdoor fan has two speeds and is controlled by T4 as follows T4 i 4 o F o C 72 22 f High 68 20 Low Y 8 4 2 3 Indoor fan running rules In cooling mode indoor fan runs all the time and the speed can be selected as high medium low and auto Auto fan in cooling mode acts as follow T1 Ts F C 7 5 3 2 QUEM see PO e A 3
4. the machine will turn to auto mode at 75 F 24 C set temperature Forced auto mode The action of forced auto mode is the same as normal auto mode with 75 F 24 C set temperature 8 4 7 Timer function 8 4 7 1 Timing range is 24 hours and the minimum resolution is 15 minutes 8 4 7 2 Timer on After turning off the machine will turn on automatically when set time is reached 8 4 7 3 Timer off After turning on the machine will turn off automatically when set time is reached 8 4 7 4 Timer on off After turning off the machine will turn on automatically when it has reached the set on time and then turn off automatically when it has reached the set off time 8 4 7 5 Timer off on After turning on the machine will turn off automatically when it has reached the set off time and then turn on automatically when it has reached the set on time 8 4 7 6 The set time is relative time 8 4 7 7 The tolerance of timer is 1 minute per hour 8 4 8 Sleep function mode 8 4 8 1 Operation time in sleep mode is 7 hours After 7 hours the AC quits this mode and turns off 8 4 8 2 Operation process in sleep mode is as follow Sleep mode is selected by pressing the economic or sleep button on the remote control the first hour 2 F the second hour In cooling the set temperature rises 2 F 1 C be lower than 86 F 30 C every one hour 2 hours later the set temperature stops rising and indoor fan is fixed as low speed When heat
5. Illuminated when lonizer is activated P s EN TURBO operation display vo Illuminated when TURBO function is selected in cooling or in heating Iu mode DIGITAL DISPLAY YY Uy Display s the current set temperature or fault error code when the air Ly NI conditioner is in operation When the SELF CLEAN feature is activated it display s SC FAN SPEED display S SS de Display s the selected fan speed LOW MED 7 and HIGH BS BB Operation Frequency display PN This display is separated into five zones The zones illuminate based on a Ka the compressor current frequency For example higher frequency will illuminate more zones Service Manual VMH SERIES Heat Controller Inc 8 3 Main Protection 8 3 1 Three Minute Time Delay at restart for compressor 1 minute delay for 1 time start up and 3 minute delay for others 8 3 2 Temperature protection of compressor top Protector cuts off compressor for 30 seconds and restarts after 3 minute delay 8 3 3 Temperature protection of compressor discharge When the compressor discharge temperature increases the compressor frequency will be limited as indicated below e Compressor discharge temp T5 gt 239 F 115 C for 5 seconds compressor stops e If T5 lt 239 F 115 C decreases compressor frequency to the lower level every 3 minutes e T52194 F 90 C cancels the frequency limit control and restarts the compressor 8 3 4 Fan Speed is out of
6. any one of the following conditions is satisfied the unit starts defrost 1 Defrost is available after 40 minutes of run time if T3 Condenser coil temperature is lt 37 F 3 C and there is a 11 F 6 C temperature difference for 3 minutes 2 Defrost is available after 80 minutes of run time if T3 Condenser coil temperature is lt 37 F 3 C and there is a 7 F 4 C temperature difference for 3 minutes 3 Defrost is available after 120 minutes of run time if T3 Condenser coil temperature is lt 37 F 3 C and there is a 4 F 2 C temperature difference for 3 minutes 4 If any of the above conditions are satisfied and the T2 Evaporator coil temperature has decreased 9 F 5 F below the normal maximum indoor pipe temperature unit starts defrost Note T2 is the maximum value of the evaporator temperature during the anti cold wind function It s recorded by the system automatically Terminating defrost If any one of following items is satisfied defrost will stop and unit will return to normal heating mode 1 Defrost time has reached 10 minutes 2 T3 Condenser coil temperature gt 46 F 8 C for 80 seconds Service Manual VMH SERIES Heat Controller Inc Defrost Actions For 9K and 12K unit compressor 4 way valve outdoor fan indoor fan indoor fan breeze 10s t 60s 70s no longer than 10 For 18K and 24K unit compressor 4 way valve outdoor fan indoor fan
7. can step on or fall onto the outdoor unit This could result in personal injury and product damage gt CAUTION B Always check for gas refrigerant leakage after installation or repair of product Low refrigerant levels may cause failure of product Install the drain hose to ensure that water is drained away properly A bad connection may cause water leakage Service Manual VMH SERIES Heat Controller Inc B Keep level even when installing the product To avoid vibration of water leakage B Use two or more people to lift and transport the product Avoid personal injury B Do not install the product where it will be exposed to sea wind salt spray directly It may cause corrosion on the product Corrosion particularly on the condenser and evaporator fins could cause product malfunction or inefficient operation gt Operational B Do not expose the skin directly to cool air for long periods of time Do not sit in the draft This could harm to your health B Do not use the product for special purposes such as preserving foods works of art etc It is a consumer air conditioner not a precision refrigerant system There is risk of damage or loss of property B Do not block the inlet or outlet of air flow It may cause product failure B Use a soft cloth to clean Do not use harsh detergents solvents etc There is risk of fire electric shock or damage to the plastic parts of the product B Do not touch the me
8. data for T1 T2 T3 and T4 sensor Temperature F 41 F 5 C 50 F 10 C 59 F 15 C 68 F 20 C 77 F 25 C 86 F 30 C 104 F 40 C 122 F 50 C 140 F 60 C Resistance Value KQ 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 3 2012 45
9. in breeze and can t be changed The louver angle is the same as in cooling mode 8 4 5 2 Compressor running rules T1 Ts F C 4 365 G rs 35 6 2 0 l _ 34 7 1 5 F2 338 1 0 i 32 9 0 5 f Ss F1 32 0 0 F1 t 8 4 5 3 Room low temperature protection If room temperature is lower than 50 F 10 C compressor will stop and not resume operation until room temperature is over 54 F 12 C 8 4 5 4 Evaporator anti freeze protection condenser high temperature protection and outdoor unit frequency limit are valid and they are the same as that in cooling mode 8 4 5 5 The outdoor fan operates same as in cooling mode 8 4 6 Forced operation function 8 4 6 1 Enter forced operation function Pressing the touch button once the machine will transfer into forced auto mode pressing the button once again the machine will turn into forced cooling mode the third press will stop the unit and the forth press is the start of the cycle of forced auto mode Refer to the following chart First press Press once Press once Forced auto Forced cooling 5 Press once Heat Controller Inc VMH SERIES Service Manual 8 4 6 2 In forced operation mode all general protections and remote control functions are available 8 4 6 3 Operation rules Forced cooling mode The compressor runs at F2 frequency and indoor fan runs as breeze After running for 30 minutes
10. operation Low noise air flow system Bird tail propeller fan makes the outdoor unit run more quietly Hydrophilic aluminum fin 4 way valve control Energized in the heating mode except when in defrost Anti rust cabinet Made from electrolytic zinc steel and anti rust coated components Valve protection cover Protects the valves and prevents water from dripping Discharge pipe temperature protection Crankcase heater chassis heater for some full DC inverter outdoor units Operates down to 5 F 15 C Service Manual VMH SERIES Heat Controller Inc 3 Dimension 3 1 Indoor Unit Ben E Dimension mm Model Ww H D B VMH09SC 845 286 165 B VMH12SC 33 3in 11 3in 6 5in B VMH18SC 1080 320 200 B VMH24SC 42 5in 12 6in 7 9in t 6in or more to ceiling Indoor unit outline Installation plate Sin or Sin or more to wall more to wall gt Left refrigerant Right refrigerant pipehole 3in pipe hole Sin 33 3n 16 lt 18000Btu h model t 6in or more from the ceiling Hooked Part 43in Indoor Unit Outline Right refrigerant ope hole 218000Btu h model Heat Controller Inc VMH SERIES Service Manual 3 2 Outdoor Unit eet N 7 t Lc E m t A le wi Model Dimension mm Ww
11. A C starts up the compressor will run at the Fmax frequency for 7 minutes according to outdoor ambient temp During the 7 minutes frequency limitation is active 7 minutes later compressor running frequency will be controlled as below T1 Ts AT i oF C 4 u 41 45 0 40 4 5 38 3 5 37 43 0 d 37 42 5 e 36 42 0 35 1 5 c 34 41 0 B 33 40 5 A i While Temp zone A B C D E F G Frequency F10 F9 F8 F7 F5 F3 F4 AT 32 F 0 C as default Note When T1 Ts stays in the same temp zone for 3 minutes the compressor will run as follows A E Increase the frequency to the higher level F10 F Keeps the current frequency G Decreases the frequency to the lower level F1 H Runs at F1 for 1h If T1 Ts AT gt 43 F 6 C compressor will stop Heat Controller Inc VMH SERIES Service Manual Meanwhile the compressor running frequency is limited by the current Current A i Compressor Off I3HEAT Frequency decreases I2HEAT Frequency holds MHEAT Normal operation If the current increases more than I2HEAT the frequency will decrease automatically if the current raises to over I3HEAT the compressor will stop and restart 3min later During the frequency decreasing if the current deceases to between I1 HEAT and I3HEAT the frequency will hold If the frequency not does not for 3min frequency will increase to a higher level and it can increase tw
12. D H WI A B A VMHO9SC 760 285 590 823 530 290 A VMH12SC 29 9in 11 2in 23 2in 32 4in 20 9in 11 4in 845 335 695 918 560 335 A VMH1 dd 33 3in 13 2in 27 4in 36 1in 22 0in 13 2in 895 330 860 975 590 333 A VMH24SC 35 2in 13 0in 33 9in 38 4in 23 2in 13 1in Service Manual VMH SERIES 4 Refrigerant Cycle Diagram INDOOR OUTDOOR Heat Controller Inc 4 CHECK VALVE LIQUID SIDE Heating Model only 4 US 2 WAY VALVE HEAT EXCHANGE EVAPORATOR CAPILIARY TUBE e v HEAT EXCHANGE CONDENSER Y Ee Ee ek e EE GAS SIDE es 3 WAY VALVE ACCUMULATOR gt REVERSING VALVE Heating Model only COMPRESSOR 4 COOLING HEATING Heat Controller Inc VMH SERIES Service Manual 5 Wiring Diagrams 5 1 Indoor Units B VMHO9SC 1 B VMH12SC 1 INDOOR WIRING DIAGRAM j OPTIONAL IONIZER P MOT INDOOR FAN MOTOR DOOR STEP MOTOR LOUVER MOTOR H 012 cM as INDOOR PCB ROOM TEMP SENSOR PIPE TEMP SENSOR OUTDOOR UNIT SWITCH BOARD DISPLAY BOARD Notes This symbol indicates the element 5 optional the actual shape shall 202032390996 be prevail B VMH18SC 1 B VMH24SC 1 WIRING DIAGRAM I INDOOR UNIT Schw Sm BAD QD QD ANN GENERATOR 5 C DI LOVER Van QD
13. D ran ve ar 12 ou MATN BOARD a er Us To The TEC Standards IDOS 202033090600 2 fte Functises la T re Amilabie for Particular Air candit ion Service Manual VMH SERIES Heat Controller Inc 5 2 Outdoor Unit A VMHO9SC 1 A VMH12SC 1 202037390733 e I OPTIONAL HEATER ap OUTDOOR WIRING DIAGRAM u CAPACITOR A VMH18SC 1 el pame en OPTIONAL HEATER 1 HEATER 2 1 OUTDOOR MAIN PCB 20203799044 1 Heat Controller Inc VMH SERIES Service Manual A VMH24SC 1 202038090493 OPTIONAL HEATER G OUTDOOR MAIN B 5 UR gt COMPRESSOR YIG CL uv Dm PCB 2 ELLQUCIREACTOR ROOS ORANGE TET 3 ero RI oen ORANGE BLUE BLUE OUTDOOR WIRING DIAGRAM D uon 6 Installation details 6 1 Power Wiring e Consult local building codes NEC National Electrical Code or CEC Canadian Electrical Code for special requirements Connection Cable Voltage drop on the connecting cable should be kept to a minimum The operating voltage will vary between 24V to 24V DC Use cable size listed below MODEL MIN CKT AMP AWG min SIZE POWER SOURCE MAX FUSE CB Connecting Cable AMP outdoor to indoor 9K 14 4 12K 208 230 60 1 15 20 COPPER 18K STRANDED 24K Service Manual VMH SERIES Heat Controller Inc 6 2 Pipe length and the elevation 1 Single Zone V Series Inverter System
14. HEAT CONTROLLER INC SERVICE MANUAL Inverter Single Zone Ductless Mini Split Heat Pump VMH Series Version C VMHO09SC 1 VMH12SC 1 VMH18SC 1 VMH24SC 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 ET is dinir eI rog E 3 LM O dE 8 32 DimensiOLS E 10 321 INGOOM BIA tere EE DES 10 3 2 Outdoor Unit nan oriri errare RE o VY REIR EE sige scevas REENEN EENS EEN VER 11 4 Refrigerant Cycle Diagram nennen ereraad vs Ad rn nd 12 5 reelle LTC 13 A Into loro H e EE 13 5 2 Outdoor ul EE 14 6 hrcltuEMScItcmee a 15 p TARP OWer WINING Dritte tate ica er code ci te Ligas adita DE 15 6 2 Pipe length and elevatlon E 16 6 3 Pressure test and evacuation sene rn enne rrr nere rena 17 f Operation characteristics 1 01 ra aa rie rar dnte rr deeg bed ento dienen vonntehurbelustednenndednogebenkendndsdins 18 8 Electronic functo NS r e E A A andan 19 NS se oedema aa ee aie eeeo heelaey 19 92 Display TUCU EEN 19 8 3 Main Protections sn asset eea A ee 20 8 4 Operation Modes and Functions nanne nenenenensereenensnensneneneesersserssersserssernsenssernenen 21 9 Troubleshooting E 35 Sd ee eet Unit Error BIESEN m a iot pie REED UR araa M soc aAa aa outed E ARDES haia 36 9 2 Diagnosis and SOON iii 36 Heat Controller Inc VMH SERIES Service Manual 1 Precaution 1 1 Safety P
15. ON A ono CH o 8 4 2 4 Condenser high temperature T3 protection When 131 F 55 C T3 140 F 60 C the compressor frequency will decrease to the lower level every 3 min until to F1 and then run at F1 When T3 lt 129 F 54 C the compressor will keep running at the current frequency When T3 lt 126 F 52 C the compressor will not limit the frequency again and resume to the former frequency When T3 gt 140 F 60 C for 5 seconds the compressor will stop and restart until T3 lt 126 F 52 C Heat Controller Inc VMH SERIES Service Manual 8 4 2 5 Evaporator low temperature T2 protection When T2 lt 32 F 0 C the compressor will stop and restart when T2 gt 41 F 5 C When 32 F 0 CST2 lt 39 F 4 C the compressor frequency is limited and decreases to the lower level every minute until stop the compressor stops When 39 F 4 C lt T2 lt 45 F 7 C the compressor will keep the current frequency When T2 gt 45 F 7 C the compressor frequency will not be limited 8 4 3 Heating Mode 8 4 3 1 Compressor running rules The operation frequency of compressor after starting submits to following rule T4 i F C 4 93 34 on 91 33 82 28 Frex F2 81 27 77 25 A 3 75 24 72 22 Fmecf4 70 21 66 19 Facts 64 18 63 17 Loes Ep 61 16 59 15 e FA Er 57 14 54 12 52 11 43 6 41 5 Fmax F3 1 Frnex f 10 Service Manual VMH SERIES Heat Controller Inc After
16. angle of 50 when the unit is turned off and is not affected by any signal from remote controller 8 4 10 2 When the unit is turned on the panel opens automatically at an angle of 50 then the horizontal louver will open 8 4 10 3 When the unit is turned off the panel is closed automatically at an angle of 50 then the horizontal louver will close 8 4 10 4 If the panel requires moving while the horizontal louver is operating the horizontal louver will stop and then carry out the action of the panel After ending the action of the panel the horizontal louver will continue its action 8 4 11 lonizer Clean Air function 8 4 11 1 Clean Air function is available only when the A C is on and it s controlled through remote controller Heat Controller Inc VMH SERIES Service Manual 8 4 11 2 After the A C is turned on the Clean Air function is switched on when the A C receives FRESH CODE the first time and ionizer is switched off when the A C receives the CODE again 8 4 11 3 After starting the Clean Air function the ionizer will work only when the indoor fan motor is running If the indoor fan motor is off the ionizer also stops working even though the Clean Air function is available 8 4 11 4 Switching the run mode will not stop the ionizer When turning off the A C the ionizer is also turned off 9 Troubleshooting Safety Because of there are capacitors in PCB electrical power is stored in the capacitors do not forget to d
17. as and open a window for ventilation before turn the product on Heat Controller Inc VMH SERIES Service Manual Do not use the telephone or turn switches on or off There is risk of explosion or fire a If strange sounds or small or smoke comes from product Turn the breaker off or disconnect the power supply cable There is risk of electric shock or fire H Stop operation and close the window in storm or hurricane If possible remove the product from the window before the hurricane arrives There is risk of property damage failure of product or electric shock H Do not open the inlet grill of the product during operation Do not touch the electrostatic filter if the unit is so equipped There is risk of physical injury electric shock or product failure B When the product is soaked flooded or submerged contact an your dealer There is risk of fire or electric shock m Use caution that water could not enter the product There is risk of fire electric shock or product damage B Ventilate the product from time to time when operating it together with a stove etc There is risk of fire or electric shock WB Turn the main power off when cleaning or maintaining the product There is risk of electric shock B When the product is not be used for a long time disconnect the power supply plug or turn off the breaker There is risk of product damage or failure or unintended operation H Take care to ensure that nobody
18. bled and no set temperature is displayed 3 Indoor fan can be set to high med low auto 4 The louver operates same as in cooling mode 5 The action of auto fan in fan only mode is the same as auto fan in cooling mode within 75 F 24 C of the set temperature E C d BECH GE 81 5 27 5 80 6 27 0 medium 77 9 25 5 71 0 250 Service Manual VMH SERIES Heat Controller Inc 8 4 2 Cooling Mode 8 4 2 1 Compressor running rules The operating frequency of compressor after starting submits to following rule T4 oF C l l Fmax F4 113 45 109 43 Fmax F7 104 40 100 38 Log 8 86 30 82 28 Hnax F6 72 22 68 20 m 1 If users switch on A C 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 is active 7 minutes later the compressor running frequency will be controlled as below T1 Ts i oF ic 38 37 37 36 40 34 33 29 30 While Temp zone A B C D E F G Frequency F8 F8 F7 F6 F5 F3 F1 Heat Controller Inc VMH SERIES Service Manual Note When T1 Ts stays in the same temp zone for 3 minutes the compressor will run as follows A E Increases the frequency to level F8 F Maintains the current frequency G Decreases the frequency to the lower level F1 H Runs at F1 for 1h
19. control When indoor fan speed is lower than 300 RPM for 50 second the whole unit stops and LED displays error code E3 and the unit will not resume operation automatically 8 3 5 Inverter module Protection Inverter module protection has a protection function against current voltage and temperature If any of these conditions occur the corresponding code will display on indoor unit LED and A C will stop Once the code is cleared unit will restart after the 3 min delay 8 3 6 Indoor fan delayed open function When the system starts up the louver will be active immediately and the indoor fan will open 10 seconds later If the system is in heating mode the anti cold wind function has priority 8 3 7 Compressor preheating functions Preheat conditions e If the main relay closes T4 lt 37 F 3 C and the unit is powered on or T4 37 F 3 C and compressor has stopped over 3 hours the compressor heating cable will operate Heat Controller Inc VMH SERIES Service Manual Preheat mode e With the compressor off a small amount of current flows through the windings of the compressor heating the crankcase Preheat termination e f T4 gt 41 F 5 C or user turns on the machine and compressor runs preheating function will stop e Crankcase heater starts when T4 lt 41 F 5 C and stops when T4 gt 59 F 15 C 8 4 Operation Modes and Functions 8 4 1 Fan only mode 1 Outdoor fan and compressor stop 2 Temperature set function is disa
20. de is equal to or greater than 10 4 F 12 C for at least ten minutes the system will restart Additionally if the outside temperature reaches at least 41 F 5 C for at least ten minutes the system will restart without the needed 1 hour compressor off time required P4 9 2 10 Inverter compressor drive error diagnosis and solution Is the connection of compressor good Is the wiring sequence right The voltage Reconnect and retry range proper Replace inverter compressor Replace the outdoor PCB 9 2 9 Zero crossing check resistance or inverter compressor it is 7O error Alarm signal when the main chip can t detect over zero signal When such failure occurs the main control board must have fault Check power supply and Correct power supply or connections correct connections Indoor PCB defective Service Manual VMH SERIES Heat Controller Inc Key parts checking 8 3 1 Compressor checking Model DA108X1C 20FZ3 Measure the resistance value of each winding by using the multi meter 7 GE Position Resistance nput termina Y Value Blue Red 0 710 qu Black Blue Black 20 C Black y Red 2 GA Red Red Blue Step Motor Model MP2835T Measure the resistance value of each winding by using the multi meter i e Resistance nput Termina Orange N Value Blue Black Red 56 5Q 20 C Pink 1 2 1 Yellow 3 RE x lt Red Yellow 117 5Q
21. e used if the procedure outlined is followed 1 System Evacuation and Charging Indoor unit Outdoor unit BS Liquid side X p he 31 SEM Two way valve C He i4 Close S ae i eA 0 a PA Y Y p A ER pum S ears SC NZD Three way valve Geet valve y i Close 2 p EIE LS AES ATA NS J 500 Microns UN Low Side HI Side ux zl Jt Charge hose Charge hose A y Vacuum AAA pump K x Vacuum pump 1 Completely tighten the flare nuts of the indoor and outdoor units connect manifold gauge low side hose to low side service valve Connect the manifold gauge charge hose to the vacuum pump Fully open the low side of manifold gauge 4 Start vacuum pump Evacuate using either deep vacuum or triple evacuation method After evacuation is complete fully close the low side of manifold gauge and shut off vacuum pump The factory charge contained in the outdoor unit is good for up to 16 5 ft of line length For line set lengths over 16 5 ft adjust charge according to chart in section 6 2 8 Disconnect charge hose from low side service valve 9 Fully open both high and low side service valves and securely tighten caps Service Manual VMH SERIES Heat Controller Inc 2 Deep Vacuum Method The deep vacuum method requires a vacuum pump capable of pulling a vacuum of 500
22. ice at most If the current deceases to lower than I1 HEAT the frequency limit will be invalid Current Maag MHEAT I2HEAT I3HEAT VMHOSSC 1 52 64 75 VMH12SC 1 5 2 6 4 7 5 VMH18SC 1 52 64 T5 VMH24SC 1 10 11 13 8 4 3 2 Outdoor fan running rules Outdoor fan and compressor start up at the same time outdoor fan stops 30s after the compressor stops The outdoor fan has two speeds and is controlled by T4 as follows T4 i F 2G 4 62 17 Low 59 15 f High Service Manual VMH SERIES Heat Controller Inc 8 4 3 3 Indoor fan rules The indoor fan speed can be selected as high medium low and auto the anti cold wind function has the priority If set temperature is reached the indoor fan switches to lowest speed the anti cold wind function has priority If operation mode is changed or compressor restarts indoor fan works in set fan speed Anti cold wind function control principle T2 F 111 100 99 93 91 Unit TELO C TEL1 CC VMHO9SC 1 63 F 17 C 75 F 24 C VMH12SC 1 T2 F C 111 44 100 38 99 37 93 34 91 33 TELO Unit TELO C VMH18SC 1 75 F 24 C VMH24SC 1 Heat Controller Inc VMH SERIES Service Manual Auto fan action in heating mode T1 Ts AT F ds 5 2 5 4 2 0 3 1 5 2 1 0 8 4 3 4 Defrost mode Conditions of defrost When the unit is running if
23. indoor fan breeze 10s bi 90s 100s AA no longer than 10 Heat Controller Inc VMH SERIES Service Manual 8 4 3 5 High evaporator coil temp T2 protection 1 T2 gt TEH2 compressor running frequency decreases to the lower level every 20s If the frequency decreased to F2 and the T2 still over TEH2 for 3 minutes the compressor will stop If T2 deceased to lower than 118 F 48 C or 118 F 48 C T2 TEH2 last for 6 minutes release the frequency limit control Unit F TEH2 C 9K 12K 127 53 C 18K 24K 131 F 55 C 2 If T2 gt 140 F 0 C the compressor stops and restarts when T2 lt 118 F 48 C 8 4 4 Auto mode This mode can be selected by the remote control and the set temperature can be changed between 17 86 F 62 C In auto mode the machine will select cooling heating or fan only mode according to the difference between T1 and Ts T1 Ts Running mode T1 Ts gt 1 F Cooling 1 lt T1 Ts 1 F Fan only T1 Ts lt 1 F Heating Indoor fan will run in auto fan of the relevant mode The louver operates the same as in relevant mode If the machine switches mode between heating and cooling the compressor will stop for 15 minutes and then choose mode according to T1 Ts again If the set temperature is modified the unit will choose run function again Service Manual VMH SERIES Heat Controller Inc 8 4 5 Dehumidify mode 8 4 5 1 Indoor fan speed is fixed
24. ing the setting temperature decreases 2 F 1 C be higher than 63 F 17 C the first hour 2 F the second hour 2 hours later the set temperature stops decreasing and indoor fan is fixed as low speed Anti cold wind function has the priority Service Manual VMH SERIES Heat Controller Inc 8 4 8 3 Timer setting is available 8 4 8 4 When user uses timer off function in sleep mode or sleep function in timer off mode if the timing is less than 7 hours sleep function will be cancelled when the set time reached If the timing is more than 7 hours the machine will not stop until it reaches the set time in sleep mode 8 4 9 Auto Restart function The indoor unit is equipped with auto restart function which is carried out through an auto restart module In case of a power failure the module memorizes the set conditions before the power failure The unit will resume the previous operation setting not including Swing function automatically after 3 minutes when power is restored If the memorization condition is forced cooling mode the unit will run in cooling mode for 30 minutes and turn to auto mode as 75 F 24 C set temp If A C is off before power off and A C is required to start up the compressor will have a 1 minute delay All other conditions the compressor will have 3 minutes delay when restarts 8 4 10 Automatic front panel function 8 4 10 1 The automatic front panel is forced to turn to the moves to closed position at an
25. ischarge the capacitor Electrolytic Capacitors HIGH VOLTAGE CAUTION Bulb 25 40W Service Manual VMH SERIES Heat Controller Inc 9 1 Indoor Unit Error Display Display LED STATUS EEPROM parameter error Indoor outdoor units communication protection Zero crossing signal error Indoor fan speed out of control Open or short circuit of outdoor temperature sensor Open or short circuit of room or evaporator temperature sensor Outdoor fan speed out of control IBM malfunction or IGBT over strong current protection Over voltage or too low voltage protection Temperature protection of compressor top 1 outdoor temp below 5 F 15 C Inverter compressor drive error Note EA amp P3 Reserved function 9 2 Diagnosis and Solution EO 9 2 1 EEPROM parameter error diagnosis and solution Shut off the power supplv and turn it on 5s later Does EO code clear Is the EEPROM chip pluaaed in indoor PCB well Correct the connection Heat Controller Inc VMH SERIES Service Manual E1 9 2 2 Indoor unit and outdoor unit communication protection error diagnosis and solution Turn off the power supply after 1 minute reapply the power turn on the unit with remote controller Does E1 code clear Check the wiring between indoor and outdoor No unit Is the connection of L N S and GND good Reconnect and retest Yes Is the LED4 red bright and LED1 ye
26. llow blinking on outdoor PCB Replace indoor PCB and repower The unit does not work normally Problem with power supply for outdoor PCB Check the wiring on outdoor PCB ia Replace the outdoor e box and compare with wiring plate Is the connection good No Correct the connection Service Manual VMH SERIES Heat Controller Inc E2 9 2 3 Zero crossing check resistance or inverter compressor it is 7O error Alarm signal when the main chip can t detect over zero signal When such failure occurs the main control board must have fault Turn off the power supply for 5 seconds then turn it back on Check power supply and Correct power supply or connections correct connections Yes Indoor PCB defective Shut off the power supply and turn on it The unit does not work normally Turn off the unit rotate the cross fan Does it rotate E3 INDOOR OR E7 OUTDOOR 9 2 4 Fan speed has been out of control diagnosis Disassemble the connection between fan and motor check bearing If bad change the Yes bearina If ok follow the below Is the fan motor connector and connection good Yes Is voltage being applied to the fan motor Replace the fan motor No Replace the PCB Heat Controller Inc VMH SERIES Service Manual E5 amp E6 9 2 5 Open or short circuit of temperature sensor diagnosis and solution Check the connections between the sensors and the PCB Are the connecti
27. microns and a vacuum of 500 microns and vacuum gage capable of accurately measuring the vacuum depth The deep vacuum method is the most positive way of assuring a system is free of air and liquid water Vacuum pressure should pull down below 500 microns in 2 minutes Evacuate system for 30 minutes Shut valve to vacuum pump off After 10 minutes read pressure If pressure remains below 1000 microns system is ready If pressure is between 1000 and 2000 microns continue evacuation for additional 30 minutes If pressure is above 2000 microns there is a leak in the system BON 3 Triple Evacuation Method The triple evacuation method should only be used when vacuum pump is only capable of pumping down to a 28 Hg vacuum and system does not contain any liquid water 1 Pump system down to 28 Hg and allow pump to continue operating for an additional 15 minutes 2 Close high and low side valves on gauge manifold and shut off vacuum pump 3 Connecta nitrogen cylinder and regulator to system and open until system pressure is 2 psig 4 Close service valve and allow system to stand for 1 hour This will allow dry nitrogen to diffuse throughout the system absorbing moisture 5 Complete this procedure until system until it is able to hold a deep vacuum then release charge into system 4 Final Tubing Check IMPORTANT Check to be certain factory tubing on both indoor and outdoor unit has not shifted during shipment Ensure tubes are not rubbi
28. n Operation by remote controller Sensing room temperature Room temperature sensor Pipe temperature sensor Room temperature control Maintains the room temperature according to the set temperature Anti freeze protection in cooling Prevents condensate from freezing on evaporator by sensing the evaporator pipe temperature in cooling mode Indoor golden fin Self diag function Time Delay Safety control Restart is for approx 3 minutes Indoor fan speed control Turbo high med low breeze Two direction air vane The unit will decide the louver direction according o jo O ba i o G o 2 3 o o O Sleep mode auto control 2 D pe 9 2 7 ae c 2 o o zx O o o o D D 5 c o 9 2 cooling and heating x s nti cold function Independent dehumidification Prevent the cold wind at the beginning of unit start Auto defrost Auto restart function The function is usually used in rainy days in springtime or damp areas Air flow Direction control The louver can be set at the desired position or swing up and down automatically When the power supply is interrupted and then restored the unit automatically restarts at the previous function setting Auto mode The mode can be change by the room temperature Temp Compensation Heat Controller Inc VMH SERIES Service Manual Outdoor unit Compressor delay 3 minute time delay between ON OFF
29. ng against each other or any sheet metal Pay close attention to feeder tubes making sure wire ties on feeder tubes are secure and tight 7 Operation characteristics Mode Cooling operation Heating operation Drying operation Temperature Room temperature gt 17 C 62F lt 30 C 88F gt 10 C 50F 0 C 50 C 32 F 122 F 15 C 34 C OC 50 C Outdoor temperature 15 C 50 C 5 F 122 F 5F 92F 32F 122F For the models with low temperature cooling system CAUTION 1 Operation of air conditioner beyond the above conditions may cause certain protections to occur 2 Room relative humidity should be less than 80 If the air conditioner operates in excess of this value the surface of the air conditioner may cause condensation If condensation does occur place the vertical air louver to its maximum angle vertically to the floor and set the fan to high speed Heat Controller Inc VMH SERIES Service Manual 8 Electronic function 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 CH nm H GIS gt I H Ma ab aa is u T KH AE AE u EN TIMER display il e Illuminated during Timer operation CLEAN AIR display optional
30. ons good Yes Replace the sensor and check if Yes Replace the outdoor or E5 or E6 displays again indoor PCB PO 9 2 6 IGBT over current protection diagnosis and solution Check whether the connections between outdoor PCB and IPM are good Yes Check whether the IPM is fixed to radiator tightly Replace the IPM Fastening the IPM to the radiator Replace the compressor The unit does not work normally Service Manual VMH SERIES Heat Controller Inc P1 9 2 7 Over voltage or too low voltage protection diagnosis and solution No Is the power supply good Make sure the power supply is normal Yes Replace the outdoor e box P2 9 2 5 High temperature protection of compressor top diagnosis and solution No Is the connection good Reconnect and retest No Does the compressor operate Is refrigerant circulation charge correct Replace it Is overload protector normal No Charge refrigerant Is the abnormality the same after gas charging Replace the outdoor PCB There is a restriction Such as capillary or welded points of the pipes Heat Controller Inc VMH SERIES Service Manual 9 29 P3 ERROR Low Ambient Protection If the outdoor temperature remains at 5 F 15 C for an hour the compressor will turn off and the error code P3 will be displayed on the indoor unit Once the compressor has been off for at least an hour and the temperature outsi
31. ontact the dealer There is risk of fire electric shock explosion or injury B Do not install the product on a defective installation stand It may cause injury accident or damage to the product B Be sure the installation area does not deteriorate with age If the base collapses the air conditioner could fall with it causing property damage product failure and personal injury B Donotletthe air conditioner run for a long time when the humidity is very high and a door or a window is left open Moisture may condense and wet or damage furniture B Take care to ensure that power cable can not be pulled out or damaged during operation There is risk of fire or electric shock B Do not place anything on the power cable There is risk of fire or electric shock B Do not plug or unplug the power supply plug during operation There is risk of fire or electric shock W Donottouch operation the product with wet hands There is risk of fire or electric shock B Do not place a heater or other appliance near the power cable There is risk of fire and electric shock B Donotallow water to run into electric parts It may cause fire failure of the product or electric shock B Do not store or use flammable gas or combustible near the product There is risk of fire or failure of product B Do not use the product in a tightly closed space for a long time Oxygen deficiency could occur BH When flammable gas leaks turn off the g
32. recaution B To prevent injury to the user or other people and property damage the following instructions must be followed B Incorrect operation due to ignoring instruction will cause harm or damage B Before service unit be sure to read this service manual at first 1 2 Warning Installation B Do not use a defective or underrated circuit breaker Use this appliance on a dedicated circuit There is risk of fire or electric shock B For electrical work contact the dealer seller a qualified electrician Do not disassemble or repair the product there is risk of fire or electric shock B Always ground the product There is risk of fire or electric shock B Install the panel and the cover of control box securely There is risk of fire of electric shock B Always install a dedicated circuit and breaker Improper wiring or installation may cause flre or electric shock B Use the correctly rated breaker of fuse There is risk of fire or electric shock B Do not modify or extend the power cable There is risk of fire or electric shock B Do not install remove or reinstall the unit by yourself customer There is risk of fire electric shock explosion or injury WB Use caution when unpacking and installing the product Service Manual VMH SERIES Heat Controller Inc Sharp edges could cause injury be especially careful of the case edges and the fins on the condenser and evaporator a For installation always c
33. tal parts of the product when removing the air filter They are very sharp There is risk of personal injury B Do not step on or put anything on the product outdoor units There is risk of personal injury and failure of product B Always insert the filter securely Clean the filter every two weeks or more often if necessary Heat Controller Inc VMH SERIES Service Manual A dirty filter reduces the efficiency of the air conditioner and could cause product malfunction or damage B Do not insert hands or other object through air inlet or outlet while the product is operated There are sharp and moving parts that could cause personal injury B Do not drink the water drained from the product It is not sanitary could cause serious health issues B Use a firm stool or ladder when cleaning or maintaining the product Be careful and avoid personal injury B Replace the all batteries in the remote control with new ones of the same type Do not mix old and mew batteries or different types of batteries There is risk of fire or explosion B Do not recharge or disassemble the batteries Do not dispose of batteries in a fire They may burn of explode B Ifthe liquid from the batteries gets onto your skin or clothes wash it well with clean water Do not use the remote of the batteries have leaked The chemical in batteries could cause burns or other health hazards Service Manual VMH SERIES Heat Controller Inc 2 Functio
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