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Heat Controller VMC18SB-1/VMH18SB-1 manual

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Table of contents for the manual

  • Page 1

    Wall Mounted Mini-Split System Single-Zone Air Conditioning/Heat Pump Service Manual(General) VMC09SB-1/VMH09SB-1 VMC12SB-1/VMH12SB-1 VMC18SB-1/VMH18SB-1 VMC24SB-1/VMH24SB-1 VMC30SB-1/VMH30SB-1 Befor e servicing the unit, r ead the “safety pr ecautions” in this manual. Only for authorized service personnel. HEA T CONTROLLER, INC.[...]

  • Page 2

    - 2 - Only for training and service purposes Air Conditioner Ser vice Manual CONTENTS P art 1 General Information 1. Safety Precautions ........................................................................................................4 P art 2 Functions & Controls 1. List of Functions & Controls .......................................[...]

  • Page 3

    - 3 - Only for training and service purposes 1. Safety Precautions ......................................................................................................... ...4 P ar t 1 General Inf ormation[...]

  • Page 4

    - 4 - Only for training and service purposes P ar t 1 General Inf or mation 1. Safety Precautions 1.1 Cautions in Repair To prevent injury to the user other people and property damage, the following instructions must be followed. ■ Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classified by the foll[...]

  • Page 5

    - 5 - Only for training and service purposes P ar t 1 General Inf or mation Do not tur n on the break er when the front panel and cabinet are remov ed. Be sure to ground the air conditioner with an ground/earth conductor connected to the ground/ear th ter minal. Conduct repair work after checking that the refrigerating cycle section has cooled down[...]

  • Page 6

    - 6 - Only for training and service purposes P ar t 1 General Inf or mation Check to see if the par ts are mounted correctly and wires are connected. Improper installation and connections can cause an electric shock or an injur y . Check whether the installation platf or m or frame has corroded. Corroded installa- tion platf or m or frame can cause[...]

  • Page 7

    - 7 - Only for training and service purposes P ar t 2 Functions & Contr ols 1. List of Controls & Functions ..........................................................................................8 2. Basic Mode Controls ........................................................................................................9 3. Special Mo[...]

  • Page 8

    - 8 - Only for training and service purposes P ar t 2 Functions & Controls 1. List of Functions & Contr ols Cooling Mode Heating Mode Healthy Dehumidification Auto Changeover Jet Cool Jet Heat Energy saving Forced operation Auto Clean Air volume control Natural Air control Chaos Swing Sleep mode Auto control Auto Restart Function Five Secon[...]

  • Page 9

    - 9 - Only for training and service purposes P ar t 2 Functions & Controls 2. Basic Mode Contr ols 2.1 Cooling Mode Setting Temp. -0.5 ° C(-1 ° F) +0.5 ° C(1 ° F) Comp. OFF Thermo ON Thermo OFF INV. Comp. Frequency Low High Low High • Operating frequency of compressor depends on the load condition, like the difference between the room tem[...]

  • Page 10

    - 10 - Only for training and service purposes P ar t 2 Functions & Controls 2.3 Health y Dehumidification operation • When the dehumidification operation is set by the remote controller, the intake air temperature is detected and the set- ting temp. is automatically set according to the intake air temperature. • When intake air temp. is 1 ?[...]

  • Page 11

    - 11 - Only for training and service purposes P ar t 2 Functions & Controls 3. Special Mode Contr ols 3.1 Jet Cool operation • In the heating mode or Fuzzy operation, the Jet cool function does not work. When it is input while in other mode of operation (cooling, dehumidification, ventilation), the Jet cool operation takes place. • In the J[...]

  • Page 12

    - 12 - Only for training and service purposes P ar t 2 Functions & Controls 4. Utility Functions 4.1 For ced operation • To operate the appliance manually if the remote control is lost. The forced operation selection switch is on the main unit of the appliance and will operate the appliance in the standard conditions. • The operating condit[...]

  • Page 13

    - 13 - Only for training and service purposes Setting temp . ( ˚ C) 1.0 ˚ C(2 ˚ F) up 1.0 ˚ C(2 ˚ F) up Cooling ON temp . (Setting temp . +0.5 ˚ C(+1 ˚ F)) Cooling OFF temp . (Setting temp . -0.5 ˚ C(-1 ˚ F)) 0.5 1 Sleep time ( hour ) P ar t 2 Functions & Controls 4.3 Air v olume control • Indoor fan motor control have 6 steps. • A[...]

  • Page 14

    - 14 - Only for training and service purposes P ar t 2 Functions & Controls 4.6.2 Sleep timer operation for heating c ycle Heatpump Onl y • While in heating mode, 60 min. after the start of the sleep timer, the setting temperature decreases by 1 ° C(2 ° F) . After another 60minutes lapse, it decreases again by 1 ° C(2 ° F) . 4.7 A uto res[...]

  • Page 15

    - 15 - Only for training and service purposes P ar t 2 Functions & Controls 5.1 Five Seconds Stand-b y (fan) • The indoor unit fan will begin to rotate after 5 seconds of the unit being turned on. 5.2 T wo Minutes Stand-b y (comp.) • After the compressor cycles off, it will not restart for a minimum of 2 minutes. 5.3 Hot star t Heatpump Onl[...]

  • Page 16

    - 16 - Only for training and service purposes P ar t 2 Functions & Controls 5.5 Compressor Preheating Heatpump Only 5.5.1 9,12kBtu/h Model With low outdoor temperature, preheating the compressor compressor is neccessary to maintain the oil viscosi- ty before the unit starts. The preheating Mode preheats the compressor motor coil/windings by ele[...]

  • Page 17

    - 17 - Only for training and service purposes P ar t 2 Functions & Controls 5.5 A utomatic defrost Heatpump Onl y 5.5.1 9,12kBtu/h Model • While in heating mode operation, in order to protect the evaporator pipe of the outdoor unit from freezing, the unit is reversed to the cooling cycle to defrost the evaporator pipe of the outdoor unit. •[...]

  • Page 18

    - 18 - Only for training and service purposes P ar t 2 Functions & Controls 5.5.2 18,24,30kBtu/h Model • Starting the defrosting operation 1) Defrost operation will start when the conditions below are met: a) Accumulation time of operation and the period after completion of defrost = 35 min. b) After 10 minutes from re-starting the compressor[...]

  • Page 19

    - 19 - Only for training and service purposes P ar t 2 Functions & Controls • Defrosting Contr ol Algorithm 1) Lowering the compressor frequency starts the defrosting operation. Constant speed compressor is ON 10 seconds. 2) The EEV has an opening 350 pulse (Option) when starting the defrosting operation. 3) Reversing valve is OFF after 5 sec[...]

  • Page 20

    - 20 - Only for training and service purposes P ar t 2 Functions & Controls 5.6 P ower Rela y Control • Power relay turns on 1 second later after the power is supplied to the outdoor unit. • Control sequence : power on → PTC operating → power relay on 5.7 In ver ter 1. The single phase power AC is converted into DC. 2. The single phase [...]

  • Page 21

    - 21 - Only for training and service purposes P ar t 2 Functions & Controls 5.8 Overheating Pr otection (P ower Module) 5.8.1 9,12kBtu/h Model • If the temperature of the heat sink thermistor reaches over Toff, the Compressor stop instantly. • The compressor operating frequency is limited according to the heat sink thermistor. (refer to bel[...]

  • Page 22

    - 22 - Only for training and service purposes P ar t 2 Functions & Controls 5.8.2 18,24,30kBtu/h Model • Function : Power module failure is protected by checking the temperature of heat sink via a temperature sensor. • Heat sink sensor failure error Short Check : if temperature ≥ 130 ° C(266 ° F) Open Check : if temperature < - 30 °[...]

  • Page 23

    - 23 - Only for training and service purposes P ar t 2 Functions & Controls 5.9 T otal Current Contr ol (Over Current Pr otection) 5.9.1 9,12kBtu/h Model 1) CT1 control • If the operating current reaches CT1, the operating frequency of the compressor decreases. • After decreasing the operating frequency by 4Hz, if operating current is below[...]

  • Page 24

    - 24 - Only for training and service purposes P ar t 2 Functions & Controls 5.9.2 18,24,30kBtu/h Model 1) Detection : check the output DC voltage of Current Transformer(CT). 2) Current Transformer Sensing Error a) In initial power input, if the CT output is over 4.0V (25A) it shows. Error Code 40 (defect in CT sensing) 3) CT 1 detection : a) If[...]

  • Page 25

    - 25 - Only for training and service purposes P ar t 2 Functions & Controls 5.10 DC P eak control 5.10.1 DC P eak Current Error b y a fault signal of IPM • If the operating current of IPM reaches 35A ± 3A, the compressor stops instantly. • If DC PEAK occurs 5 times within 1 hour, the appliance turns off and displays Error Code 6(9,12kBtu/h[...]

  • Page 26

    - 26 - Only for training and service purposes P ar t 2 Functions & Controls 5.11.2 In ver ter Compressor (18,24,30kBtu/h Model) 1) There can be two situations (a) Temperature sensor is failed (Error Code 41) (b) Abnormal high temperature discharge temperature (error code for high discharge will be generated) Both cases unit will stop. 2) Compre[...]

  • Page 27

    - 27 - Only for training and service purposes P ar t 2 Functions & Controls 5.11.3 Constant Compressor (only 30kBtu/h Model) 1) There can be two situations (a) Temperature sensor is failed (Error Code 41) (b) Abnormal high temperature discharge temperature (error code for high discharge will be generated) Both cases unit will stop. 2) Compresso[...]

  • Page 28

    - 28 - Only for training and service purposes P ar t 2 Functions & Controls 5.12 Low Ambient contr ol 5.12.1 9,12kBtu/h Model • If outdoor temperature drops below a certain temperature, liquid return is prevented by On/Off control of outdoor fan. • It can prevent frosting of evaporator and keep cooling operation 5.12.2 18, 24, 30kBtu/h Mode[...]

  • Page 29

    - 29 - Only for training and service purposes P ar t 2 Functions & Controls 5.14 Oil equalizing contr ol(30kBtu/h Model) Operating condition : 1) When the continuous inverter compressor running time at under 40 Hz(option) is over 2 hours(option) in 2 com- pressor system, oil restoring operation begins. 2) If compressor operating Hz is below 40 [...]

  • Page 30

    - 30 - Only for training and service purposes P ar t 3 T est Run P ar t 3 T est Run 1. Check bef ore T est Run ...................................................................................................31 2. T est Run Flo w chart .......................................................................................................32 3. T e[...]

  • Page 31

    - 31 - Only for training and service purposes P ar t 3 T est Run Check to see whether there is any refrigerant leakage, and check whether the power or transmission cable is connected properly. Check whether the liquid pipe and gas pipe valves are fully opened. NOTE : Be sure to tighten caps. Confirm that 500 V meter shows 2.0 M Ω or more between [...]

  • Page 32

    - 32 - Only for training and service purposes P ar t 3 T est Run Is cold air discharged for more than 3 minutes ? START Test operation for indoor unit Operation mode change to Heating mode Operate the unit in cooling mode. Does Test operation start? Refer to part4, Section 7: Electronic Troubleshooting Guide Yes No Yes Refer to part4, Section 5: Cy[...]

  • Page 33

    - 33 - Only for training and service purposes P ar t 3 T est Run 1. Check that all tubing and wiring have been properly con- nected. 2. Check that the gas and liquid side service valves are fully open. Settlement of outdoor unit • Anchor the outdoor unit with a bolt and nut Ø 0.39 inch tightly and horizontally on a concrete or rigid mount. • W[...]

  • Page 34

    - 34 - Only for training and service purposes P ar t 4 T r ouble Shooting 1. 2-W ay , 3-W ay V alve ........................................................................................................3 5 2. Pumping Down ..............................................................................................................3 6 3. Evacuatio[...]

  • Page 35

    - 35 - Only for training and service purposes P ar t 4 T roub le Shooting 2-way Valve (Liquid Side) 3-way Valve (Gas Side) Shaft position Shaft position Service port Closed Closed Closed (with valve cap) (with valve cap) (with cap) Open Closed Open (counter-clockwise) (clockwise) (push-pin or with vacumm pump) Open Open Closed (with valve cap) (wit[...]

  • Page 36

    - 36 - Only for training and service purposes P ar t 4 T roub le Shooting • 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 raised position. – Be sure to use a hexagonal wrench to operate the valve stems. (2) Operate the unit for [...]

  • Page 37

    - 37 - Only for training and service purposes P ar t 4 T roub le Shooting • Procedure (1) Connect the vacuum pump to the center hose of charge set center hose (2) Evacuation for approximately one hour. – Confirm that the gauge needle has moved toward 0.8 Torr (2PSF). (3) Close the valve (Lo side) on the charge set, turn off the vacuum pump, and[...]

  • Page 38

    - 38 - Only for training and service purposes P ar t 4 T roub le Shooting Lo Charging cylinder Outdoor unit Indoor unit Liquid side Gas side Open 3-Way valve 3-Way valve OPEN Open Check valve (1) CLOSE Vacuum Gage • Procedure (1) Connect the charge hose to the charging cylinder. – Connect the charge hose which you dis-con- nected from the vacuu[...]

  • Page 39

    - 39 - Only for training and service purposes P ar t 4 T roub le Shooting T roub le analysis 1. Check temperature difference between intake and discharge air, and operating current. All amount of refrigerant leaked out. Check refrigeration cycle. Refrigerant leakage Clog of refrigeration cycle Defective compressor Excessive amount of refrigerant No[...]

  • Page 40

    - 40 - Only for training and service purposes P ar t 4 T roub le Shooting The Product doesn ’ t operate at all. (9~30kBtu/h Model) Turn off the main power and wait until LED on outdoor PCB is off. Turn on the main power again. "Beeping" sound is from the indoor unit? Flashing LED mounted on the outdoor PCB? • Primarily, the operating [...]

  • Page 41

    - 41 - Only for training and service purposes P ar t 4 T roub le Shooting Turn on main power. Wait 2 minutes for the compressor to turn on. When the compressor is stopped stopped, the Indoor Fan is driven by a low speed. At this point the air speed is not controlled by the remote controller. (When operated in the Sleeping Mode, the air speed is set[...]

  • Page 42

    - 42 - Only for training and service purposes P ar t 4 T roub le Shooting Turn on the main power. When in air circulation mode, compressor/outdoor fan is stopped. Turn off main power. Check the electrical wiring diagram of Outdoor side. Check the open or short of connecting wires between Indoor and Outdoor. Check that the sensor for Indoor temperat[...]

  • Page 43

    - 43 - Only for training and service purposes P ar t 4 T roub le Shooting Turn on the main power. When in air circulation mode, compressor/outdoor fan is stopped. Turn off main power. Check the electrical wiring diagram of Outdoor side. Check the open or short of connecting wires between Indoor and Outdoor. Check the sensor for Indoor temperature i[...]

  • Page 44

    - 44 - Only for training and service purposes P ar t 4 T roub le Shooting When indoor Fan does not operate.(9~30kBtu/h Model) T r ouble 5 Check the SSR high speed operation by remote control. (the Indoor Fan Motor is connected) Turn off main power. Check the connection of CN-FAN. Check the Fan Motor. Check the Fuse(AC250V, T2A). Turn on the main po[...]

  • Page 45

    - 45 - Only for training and service purposes P ar t 4 T roub le Shooting 7. Self-diagnosis Function ■ Error Indicator • The error indicator assists with self-diagnoisis of the air conditioner and identifies if there is any trouble. • The error indicator location is near the ON/OFF button by the LED on the evaporator and will signal as shown [...]

  • Page 46

    - 46 - Only for training and service purposes P ar t 4 T roub le Shooting ■ 18,24,30kBtu/h Model Indoor Error 00 No Error ● ON 01 Indoor Room themistor error ● 1time ◑ OFF 02 Indoor in-piping sensor error ● 2times ◑ OFF 05 Communcation error between indoor and outdoor units ● 5times ◑ OFF 06 Indoor Out-Piping sensor error ● 6times[...]

  • Page 47

    - 47 - Only for training and service purposes P ar t 4 T roub le Shooting Case of error LED02G (Green) LED01G (Red) Contents Error code CT Circuit malfunction Open / Short Open / Short Open / Short Open / Short Open / Short Communication Poorly Check sum mismatching Cond. Temp. high Heat sink temp. high Open / Short CT Circuit (open/ short) Sensor [...]

  • Page 48

    - 48 - Only for training and service purposes ■ T roub leshooting Guide(9,12kBtu/h Model) P ar t 4 T roub le Shooting Description Cause of error 1 • Indoor thermistor (sensor) is short or open • Indoor thermistor (sensor) is not connected to the indoor pcb assembly • Damage or defect on the sensing circuit of indoor pcb assembly. (R01H, R02[...]

  • Page 49

    - 49 - Only for training and service purposes P ar t 4 T roub le Shooting 4 • Heat-sink thermistor is damaged(short or open). • Heat-sink Temp. is over 95 ° C(203 ° F) • Damage or defect on the sensing circuit of outdoor pcb assembly. (R01H, R02H, C01H) Heat-sink Temp. is over 95 ° C(203 ° F) Heat-sink thermistor is open or short Heat-sin[...]

  • Page 50

    - 50 - Only for training and service purposes P ar t 4 T roub le Shooting 5 • Wrong or missing wiring between indoor and outdoor unit cable • Defect of communication components in indoor pcb assembly • Defect of communication components in outdoor pcb assembly • Defect of power supply components in outdoor pcb assembly • No ground connect[...]

  • Page 51

    - 51 - Only for training and service purposes P ar t 4 T roub le Shooting Cause of error 6 • Supplied power is not normal • Comp Connector (CN-U,V,W) is disconnected or inserted into the wrong position • Compressor is damaged (coil short) ➔ replace compressor • Too much Refrigerant • Defect in outdoor pcb assembly ➔ replace pcb assemb[...]

  • Page 52

    - 52 - Only for training and service purposes P ar t 4 T roub le Shooting 7 • Supplied power is not normal • Indoor/outdoor fan is locked • Too much refrigerant • Defect in current sensing circuit in outdoor pcb assembly Over current Error (CT2) Supplied voltage to Outdoor pcb is about AC 208~230V ? Does indoor / outdoor fan work normally ?[...]

  • Page 53

    - 53 - Only for training and service purposes P ar t 4 T roub le Shooting 8 • Indoor fan is locked or separated • Fan connector is not connected to indoor pcb assembly • Defective DC-fan driving circuit Indoor fan is locked (BLDC fan model only) Indoor fan is rotating ? (1) Indoor fan is rotating ? (2) YES No Check indoor unit - remove obstac[...]

  • Page 54

    - 54 - Only for training and service purposes P ar t 4 T roub le Shooting 10 • Discharge pipe temp. is short or open • Discharge pipe temp. is not connected to the outdoor pcb assembly • Damage or defect on the sensing circuit of outdoor pcb assembly Discharge pipe temp. is short or open Discharge pipe temp. is connected to Outdoor pcb assemb[...]

  • Page 55

    - 55 - Only for training and service purposes P ar t 4 T roub le Shooting 1) T roub leshooting CH01, CH02, CH06 Ω 10k Ω Check the resistance Check the voltage V 2.5VDC 01 02 06 Indoor air sensor Indoor inlet pipe sensor Indoor outlet pipe sensor • Open / Short • Soldered poorly • Internal circuit error • Open / Short • Soldered poorly[...]

  • Page 56

    - 56 - Only for training and service purposes P ar t 4 T roub le Shooting 2) T roub leshooting CH05, CH53 05 / 53 Communication (Indoor → Outdoor) • Communication poorly • Power input AC 208~230V. (Outdoor, Indoor) • The connector for transmission is disconnected. • The connecting wires are misconnected. • The GND1,2 is not connected at[...]

  • Page 57

    - 57 - Only for training and service purposes P ar t 4 T roub le Shooting 3) T roub leshooting CH21 Ω Comp Copper pipe Resistance( Ω ) at 20°C(68°F) Resistance( Ω ) at 20 ° C(68 °F) 0.64 0.64 0.64 Inverter comp. V-W W-U U-V Terminal 0.8 0.8 0.8 Constant comp. 2M Ω 2M Ω 2M Ω Inverter comp. V-GND W-GND U-GND Terminal 2M Ω 2M Ω 2M [...]

  • Page 58

    - 58 - Only for training and service purposes P ar t 4 T roub le Shooting 4) T roub leshooting CH21, CH22 V 21 22 DC_Peak C/T Internal circuit Compressor output current over.(30A ↑ ) Initial current error check if the compressor is locked or operating. Check the compressor insulation and motor wire resistance. Check if the outdoor fan is locked o[...]

  • Page 59

    - 59 - Only for training and service purposes P ar t 4 T roub le Shooting 5) T roub leshooting CH23, CH28 V 23 28 DC Link Low voltage. DC Link High voltage • DC link volt. is 140VDC or lower. • DC link volt. is 140VDC or higher. • Check the power source. • Check the DC Link Voltage. • Check the power source. • Check the DC Link Voltage.[...]

  • Page 60

    - 60 - Only for training and service purposes P ar t 4 T roub le Shooting 6) T roub leshooting CH24, CH25 CN TRNAS1 CN PRESS TRANS1 60Hz, DC12V 24 25 Press S/W Open Input voltage • Low / High press S/W open. • Abnormal Input voltage (140VAC or lower 300VAC or higher). • Check the connection of “ CN_Press ” . • Check the components. • [...]

  • Page 61

    - 61 - Only for training and service purposes P ar t 4 T roub le Shooting 7) T roub leshooting CH26, CH27 ‘ B ’ ‘ A ’ 26 27 DC Compressor Position PSC Fault • Compressor position detect error • Over current at “ IGBT ” • Check the connection of comp wire “ U,V,W ” • Malfunction of compressor • Check the component of “ IP[...]

  • Page 62

    - 62 - Only for training and service purposes P ar t 4 T roub le Shooting 8) T roub leshooting CH32, CH33, CH40 LEV Openness (Pulse) COMP Frequency (Hz) Toff(105) ° C T1(90) ° C T2(95) ° C OFF Normal OFF Control Normal Normal Normal Discharge pipe temp. (221) ° F (194) ° C (203) ° C 32 33 40 Discharge pipe (Inverter) temp. high (105 ° C(221 [...]

  • Page 63

    - 63 - Only for training and service purposes P ar t 4 T roub le Shooting 9) T roub leshooting CH41, CH44, CH45, CH46, CH47, CH65 Ω 41 44 45 46 47 65 Discharge pipe sensor (Inverter) Air sensor Condenser Pipe sensor Suction Pipe sensor Discharge pipe sensor (Constant) Heat sink sensor • Open / Short • Soldered poorly • Internal circuit erro[...]

  • Page 64

    - 64 - Only for training and service purposes P ar t 4 T roub le Shooting 10) T roub leshooting CH51, CH60 60 EEPROM Check sum • Check sum error • Check the PCB ASM P/No. • Check for poor soldering. Display code Title Cause of error Check point & Normal condition Chec k P oint • CH 60 1. Check the condition of EEPROM. 2. Check for poor [...]

  • Page 65

    - 65 - Only for training and service purposes P ar t 4 T roub le Shooting 11) T roub leshooting CH61, CH62 61 62 Condenser pipe sensor temp. high Heat sink sensor temp. high • Condenser pipe sensor detected high temp.(65 ° C(149 ° F)) • Heat sink sensor detected high temp.(85 ° C(185 ° F)) • Check the load condition. • Check the sensor [...]

  • Page 66

    P/NO : MFL41161604 20/02/2008 Specifications and performance data subject to change without notice. HEA T CONTROLLER, INC. 1900 WELL W ORTH A VENUE • JA CKSON, MICHIGAN 49203 THE QU ALITY LEADER IN CONDITIONING AIR[...]