HEAT CONTROLLER, INC. 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 Before servicing the unit, read the “safety precautions” in this manual. Only for authorized service personnel.
Air Conditioner Service Manual CONTENTS Part 1 General Information 1. Safety Precautions........................................................................................................4 Part 2 Functions & Controls 1. List of Functions & Controls........................................................................................8 2. Basic Mode Controls ...................................................................................................9 3. Special Mode Controls ...................
Part 1 General Information 1. Safety Precautions ............................................................................................................
Part 1 General Information 1. Safety Precautions 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 following indications. This symbol indicates the possibility of death or serious injury. This symbol indicates the possibility of injury or damage to property only. ■ Meanings of symbols used in this manual are as shown below.
Part 1 General Information Do not use a defective or underrated circuit breaker. Use the correctly rated breaker and fuse. Otherwise there is a risk of fire or electric shock. Install the panel and the cover of control box securely. Otherwise there is risk of fire or electric shock due to dust, water etc. Indoor/outdoor wiring connections must be secured tightly and the cable should be routed properly so that there is no force pulling the cable from the connection terminals.
Part 1 General Information 1.2 Inspections after Repair Check to see if the power cable plug is not dirty or loose. If the plug is dusty or loose it can cause an electrical shock or fire. Do not use a joined power cable or extension cable, or share the same power outlet with other electrical appliances. Otherwise, it can cause an electrical shock, excessive heat generation or fire. Do not insert hands or other objects through the air inlet or outlet while the product is operating.
Part 2 Functions & Controls 1. List of Controls & Functions ..........................................................................................8 2. Basic Mode Controls........................................................................................................9 3. Special Mode Controls...................................................................................................11 4. Utility Functions .....................................................................................
Part 2 Functions & Controls 1. List of Functions & Controls Category Basic mode controls Special Mode controls Function Cooling Mode Heating Mode Healthy Dehumidification Auto Changeover Jet Cool Jet Heat Energy saving Forced operation Auto Clean Utility Functions Air volume control Natural Air control Chaos Swing Sleep mode Auto control Auto Restart Function Five Second Delay (Fan) Two Minutes Stand-by (Comp.
Part 2 Functions & Controls 2. Basic Mode Controls 2.1 Cooling Mode Thermo ON +0.5°C(1°F) Setting Temp. -0.5°C(-1°F) Thermo OFF INV. Comp. Frequency Low High Comp. OFF High Low • Operating frequency of compressor depends on the load condition, like the difference between the room temp. and the set temp., frequency restrictions. • If the compressor operates at some frequency, the operating frequency of compressor cannot be changed within 30 seconds.
Part 2 Functions & Controls 2.3 Healthy Dehumidification operation • When the dehumidification operation is set by the remote controller, the intake air temperature is detected and the setting temp. is automatically set according to the intake air temperature. Intake air Temp. Setting Temp. 26°C(78.8°F) ≤ intake air temp. 25°C(77°F) 24°C(75.2°F) ≤ intake air temp.< 26°C(78.8°F) intake air temp. -1°C(-2°F) 22°C(71.6°F) ≤ intake air temp. < 24°C(75.2°F) intake air temp. -0.5°C(-1°F) 18°C(64.
Part 2 Functions & Controls 3. Special Mode Controls 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 Jet cool mode, the indoor fan is operated at super-high speed for 30 min. at cooling mode operation. • In the Jet cool mode, the room temperature is maintained at a setting temperature of 18°C(64.4°F).
Part 2 Functions & Controls 4. Utility Functions 4.1 Forced 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 condition is set according to the outdoor temp. and intake air temperature as follows. Heat pump Model Cooling Model Room Temp. ≥ 24°C(75.2°F) 21°C(69.8°F) ≤ Room Temp. < 24°C(75.2°F) Room Temp. < 21°C(69.
Part 2 Functions & Controls 4.3 Air volume control • Indoor fan motor control have 6 steps. Step Description • Air volume is controlled "SH", "H", "Med", "Low" by the remote controller. LL L M H SH Auto Very low, In heating mode Low Med High Super high Natural wind • "LL" step is selected automatically in Hot start operation. 4.4 Natural Air Control(Auto Wind) • When the Auto Step is selected, the high, medium, or low speed of the airflow mode is operated for 2~15 sec.
Part 2 Functions & Controls 4.6.2 Sleep timer operation for heating cycle Heatpump Only • 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). Setting temp. (°C) Heating ON temp. (Setting temp) 1.0°C(2°F) down 1.0°C(2°F) down Heating OFF temp. (Setting temp. +4.0°C(+8°F)) 1 2 Sleep time (hr) 4.
Part 2 Functions & Controls 5. Protection Functions & Controls 5.1 Five Seconds Stand-by (fan) • The indoor unit fan will begin to rotate after 5 seconds of the unit being turned on. 5.2 Two Minutes Stand-by (comp.) • After the compressor cycles off, it will not restart for a minimum of 2 minutes. 5.3 Hot start Heatpump Only • To prevent cold air from blowing in the room upon starting up the unit in heating mode, the indoor fan will not rotate until the heat exchanger temperature reaches 30˚C(86˚F). 5.
Part 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 viscosity before the unit starts. The preheating Mode preheats the compressor motor coil/windings by electric current without compressor running. Mode-in conditions : Outdoor temp. < 0˚C (32˚F) and Discharge pipe temp < 15˚C (59˚F) Mode-out conditions : Outdoor temp.
Part 2 Functions & Controls 5.5 Automatic defrost Heatpump Only 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. • Defrost control is available 40 minutes after the heating cycle started and the difference of the pipe tem-perature of outdoor unit reaches above option 1.
Part 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 and over 35 minutes of accumulated operating time, defrosting operation starts after 10 minutes.
Part 2 Functions & Controls • Defrosting Control 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 seconds from the compressor reaching an operating frequency of 30 Hz. Then the indoor fan turns OFF (including when the indoor unit is OFF, except if the remote controller is OFF).
Part 2 Functions & Controls 5.6 Power Relay 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 Inverter U V W + U V W 3Ø Comp. Motor 1. The single phase power AC is converted into DC. 2. The single phase power DC is converted into a three phase chopped DC voltage with a variable frequency. 3.
Part 2 Functions & Controls 5.8 Overheating Protection (Power 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 below FIG.) • The LED on PCB board will blink 4 times, when the thermistor is open or short, also when the temperature is over T off. T off °C ∆T = (T off - T on)/3 T1 = T on + ∆T T2 = T on + 2 * ∆T Heat Sink Temp.
Part 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°C(-22°F) System will go in self diagnosis (Error code 65) is displayed and product stops.
Part 2 Functions & Controls 5.9 Total Current Control (Over Current Protection) 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 I1 for 60 seconds continuously, the operating frequency of compressor increases to setting frequency.
Part 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 total current exceeds the value of CT1, then the operating frequency will be reduced by 1 step. - Step down 10Hz from current step. - If new Hz is below the minimum frequency 15Hz, then turn off the compressor.
Part 2 Functions & Controls 5.10 DC Peak control 5.10.1 DC Peak Current Error by 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 Model) / Error Code 21(18,24,30kBtu/h Model). 5.10.
Part 2 Functions & Controls 5.11.2 Inverter 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.
Part 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) Compressor working (a) If discharge pipe temperature < T1 Compressor ON, EEV on-time control (b) T2 ≤ discharge pipe temperature < Toff (Hysteresis control) Expansion valve up by 10 pulses every 1 min.
Part 2 Functions & Controls 5.12 Low Ambient control 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 Model Mode-in Condition Mode-out Condition Mode-in by outdoor pipe temp. Outdoor fan-on time ≥ 3 min. (And) Outdoor pipe temp. ≤ 4˚C (39˚F) (And) Outdoor temp. < 10˚C (50˚F) Outdoor fan-off time ≥ 5 min. (Or) Outdoor pipe temp.
Part 2 Functions & Controls 5.13 Oil return control(30kBtu/h Model) Heatpump Only 5.13.1 Operating Contion 1) When the continuous running time is over 3hr.(option), oil returning operation is run for 3min. In case of the initial operation, oil returning operation is run, after completing initial operation. 2) After defrost and oil returning operation, the continuous running time is reset. 5.13.2 Operation Process 1) EEV-Full open, Hot gas bypass valve-On 2) Compressor Step-70Hz + Constant Comp.
Part 3 Test Run Part 3 Test Run 1. Check before Test Run...................................................................................................31 2. Test Run Flow chart .......................................................................................................32 3. Test Run Detail................................................................................................................
Part 3 Test Run 1. Check before Test Run 1 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. 2 NOTE: Be sure to tighten caps. Confirm that 500 V meter shows 2.0 MΩ or more between power supply terminal block and ground. Do not operate when there is of 2.0 MΩ or less. 3 NOTE: Never carry out mega ohm check over terminal control board.
Part 3 Test Run 2. Test Run Flow chart START Test operation for indoor unit Operate the unit in cooling mode.
Part 3 Test Run 3. Test Run Detail 1. Check that all tubing and wiring have been properly connected. NOTE: If the actual pressure is higher than shown, the system is most likely over-charged, and charge should be removed. If the actual pressures are lower than shown, the system is most likely undercharged, and charge should be added. 2. Check that the gas and liquid side service valves are fully open. Settlement of outdoor unit The air conditioner is now ready for use.
Part 4 Trouble Shooting 1. 2-Way, 3-Way Valve ........................................................................................................35 2. Pumping Down ..............................................................................................................36 3. Evacuation ......................................................................................................................37 4. Gas Charging (After Evacuation) ............................................................
Part 4 Trouble Shooting 1.
Part 4 Trouble Shooting 2. Pumping Down Liquid side Indoor unit 2-Way valve Open Outdoor unit Gas side Closed 3-Way valve Lo CLOSE CLOSE Purge the air • 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.
Part 4 Trouble Shooting 3. Evacuation Liquid side Indoor unit Outdoor unit 3-Way valve Open Gas side 3-Way valve Open Vacuum pump Vacuum Gage Lo OPEN OPEN • 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).
Part 4 Trouble Shooting 4. Gas Charging (After Evacuation) Liquid side Indoor unit 3-Way valve Open Outdoor unit Gas side Open 3-Way valve Check valve Charging cylinder Vacuum Gage Lo (1) OPEN CLOSE • Procedure (1) Connect the charge hose to the charging cylinder. – Connect the charge hose which you dis-connected from the vacuum pump to the valve at the bottom of the cylinder.
Part 4 Trouble Shooting 5. Cycle Troubleshooting Guide Trouble analysis 1. Check temperature difference between intake and discharge air, and operating current. Temp. difference Current : approx. 0°C(1°F) : less than 80% of rated current All amount of refrigerant leaked out. Check refrigeration cycle. Temp. difference Current : approx. 8°C(16°F) : less than 80% of rated current Refrigerant leakage Clog of refrigeration cycle Defective compressor Temp.
Part 4 Trouble Shooting 6. Electronic Parts Troubleshooting Guide Trouble 1 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? NO YES • Primarily, the operating condition of Micom is O.K. Check the voltage of power(AC 208~230V, 60Hz). • The voltage of main power. • The voltage applied to the unit.
Part 4 Trouble Shooting Trouble 2 Product doesn't operate with the remote controller. (9~30kBtu/h Model) 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 to the low speed as force).) Caused by the remote controller.
Part 4 Trouble Shooting Trouble 3 The Compressor/Outdoor Fan does not operate (9, 12kBtu/h Model) Turn on the main power. Using the remote controller, set the indoor set point to at least 15˚C(5˚F) less than the indoor air temperature. When in air circulation mode, compressor/outdoor fan is stopped. Check that the sensor for Indoor temperature sensor is attatched and as close to the heat exchanger (EVA.) as possible. When displaying Error code, refer to the trouble shooting guide.
Part 4 Trouble Shooting Trouble 4 The Compressor/Outdoor Fan does not operate (18, 24, 30kBtu/h Model) Turn on the main power. Using the remote controller, set the indoor set point to at least 15˚C(5˚F) less than the indoor air temperature. When in air circulation mode, compressor/outdoor fan is stopped. Check the sensor for Indoor temperature is attatched as close as to be effected by the themperature of Heat Exchange (EVA.) When displaying Error code, refer to the trouble shooting guide.
Part 4 Trouble Shooting Trouble 5 When indoor Fan does not operate.(9~30kBtu/h Model) Turn off main power. Check the connection of CN-FAN. Check the Fan Motor. Check the Fuse(AC250V, T2A). Check the related circuit of indoor Fan Motor. • The pin No. 38 of micom and the Q01M that drives the SSR. • Check the related pattern. • Check the SSR. - SSR Open: Indoor Fan Motor never operate. - SSR short: Indoor Fan Motor always operates in case of ON or OFF.
Part 4 Trouble 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 in the table below. • If more than two errors occur simultaneously, primarily the highest severity error code is displayed.
Part 4 Trouble Shooting ■ 18,24,30kBtu/h Model Indoor Error Error code Descrition INV TPS LED1 (Red) LED2 (Green) Indoor Status ON 00 No Error ● 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 ◑ OFF Outdoor Error Ex) Error Code 21 (IPM Fault) 2 Times 2 Times 2 Times LED01G (RED) 1 Sec. 1 Sec. 1 Time 1 Sec.
Part 4 Trouble Shooting Error code Contents LED01G LED02G (Green) (Red) Case of error Outdoor Status CT Circuit malfunction Off 1 time Open / Short Off 4 times 4 times Open / Short Off Cond. Pipe sensor (open/ short) 4 times 5 times Open / Short Off 46 Suction pipe sensor (open/ short) 4 times 6 times Open / Short Off 47 Sensor Cons.
Part 4 Trouble Shooting ■ Troubleshooting Guide(9,12kBtu/h Model) Error code Description Cause of error 1 Indoor thermistor is short or open • 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.
Part 4 Trouble Shooting Description Error code 4 Cause of error • Heat-sink thermistor is damaged(short or open). Heat-sink Temp. is over 95°C(203°F) • Heat-sink Temp. is over 95°C(203°F) Heat-sink thermistor is open or short • Damage or defect on the sensing circuit of outdoor pcb assembly.
Part 4 Trouble Shooting Error code Description 5 Cause of error • 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 connection in air conditioner unit (affected by noise in power source) Communication Error Check flow YES YES Is the voltage of T/Block , in outdoor about AC 208~230V ? Wiring connecti
Part 4 Trouble Shooting Error code Cause of error Description 6 DC Peak Error • 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 assembly Check flow YES YES Is connector (CN-U,V,W) connected to compressor and inserted into the pcb in right position ? Supplied voltage to Outdoor pcb is about AC 208~230V ? No Refrig
Part 4 Trouble Shooting Error code Description Cause of error 7 Over current Error (CT2) • Supplied power is not normal • Indoor/outdoor fan is locked • Too much refrigerant • Defect in current sensing circuit in outdoor pcb assembly Check flow YES Supplied voltage to Outdoor pcb is about AC 208~230V ? YES Does indoor / outdoor fan work normally ? No No No Check indoor / outdoor fan and adjust. Check power source YES Current sensing circuit is right ? No Check current sensing circuit.
Part 4 Trouble Shooting Error code Description Cause of error 8 Indoor fan is locked (BLDC fan model only) • Indoor fan is locked or separated • Fan connector is not connected to indoor pcb assembly • Defective DC-fan driving circuit Check flow YES Indoor fan is rotating ? (1) YES Indoor fan is rotating ? (2) No DC–fan driving circuit is right ? No Check indoor unit - remove obstacles in indoor unit - fan assembled correctly.
Part 4 Trouble Shooting Error code Description Cause of error 10 Discharge pipe temp. is short or open • 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 Check flow YES Discharge pipe temp. is connected to Outdoor pcb assembly ? No Connect to CN-D_PIPE in outdoor pcb assembly Only for training and service purposes YES Discharge pipe temp.
Part 4 Trouble Shooting ■ Troubleshooting Guide(18,24,30kBtu/h Model) 1) Troubleshooting CH01, CH02, CH06 Error code Title 01 Indoor air sensor • Open / Short • Soldered poorly • Internal circuit error Normal resistor : 10kΩ/ at 25°C(77°F) (Unplugged) Normal voltage : 2.5VDC / at 25°C(77°F) (plugged) 02 Indoor inlet pipe sensor • Open / Short • Soldered poorly • Internal circuit error Normal resistor : 5kΩ/ at 25°C(77°F) (Unplugged) Normal voltage : 2.
Part 4 Trouble Shooting 2) Troubleshooting CH05, CH53 Error code 05 / 53 Title Communication (Indoor → Outdoor) Cause of error • Communication poorly Check point & Normal condition • 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 main GND. • The communication line is shorted at GND. • Transmission circuit of outdoor PCB is abnormal. • Transmission circuit of indoor PCB is abnormal.
Part 4 Trouble Shooting 3) Troubleshooting CH21 Error code Title 21 Cause of error • Instant over current • Over Rated current • Poor insulation of IPM DC Peak Comp U Terminal U-V V-W W-U W Comp • An instant over current in the U,V,W phase - Comp lock - The abnormal connection of U,V,W • Over load condition - Overcharging of refrigerant - Pipe length. • Poor insulation of compressor Resistance(Ω) at 20°C(68°F) Ω V Check point & Normal condition Copper pipe Inverter Constant comp. comp. 0.
Part 4 Trouble Shooting 4) Troubleshooting CH21, CH22 Error code Title DC_Peak 21 22 Cause of error C/T Internal circuit Compressor output current over.(30A↑) check if the compressor is locked or operating. Check the compressor insulation and motor wire resistance. Check if the outdoor fan is locked or operating. Check the IPM short. Initial current error Check AC input voltage. Check if the outdoor fan is locked or operating. Check input current. Check the C01N DC voltage.
Part 4 Trouble Shooting 5) Troubleshooting CH23, CH28 Error code Title 23 DC Link Low voltage. • DC link volt. is 140VDC or lower. • Check the power source. • Check the DC Link Voltage. 28 DC Link High voltage • DC link volt. is 140VDC or higher. • Check the power source. • Check the DC Link Voltage. Cause of error Check point & Normal condition Check Point 1. Check the power source. 2. Check the DC Link Voltage.
Part 4 Trouble Shooting 6) Troubleshooting CH24, CH25 Error code Title 24 Press S/W Open 25 Input voltage Cause of error Check point & Normal condition • Check the connection of “CN_Press”. • Check the components. • Low / High press S/W open. • Abnormal Input voltage • Check the power source. (140VAC or lower 300VAC • Check the components. or higher). TRANS1 60Hz, DC12V CN PRESS CN TRNAS1 Check Point • CH 24 • CH 25 1. Check the connection of “CN_PRESS” 1. Check the power source. 2.
Part 4 Trouble Shooting 7) Troubleshooting CH26, CH27 Error code Title 26 DC Compressor Position 27 PSC Fault Cause of error Check point & Normal condition • Compressor position detect error • Check the connection of comp wire “U,V,W” • Malfunction of compressor • Check the component of “IPM”, detection parts. • Over current at “IGBT” Check the Reactor spec. (18k,30k:10A/26.8mH, 24k:13A/13mH * 2) Check AC input voltage. Check if the outdoor fan is locked or operating. Check input current.
Part 4 Trouble Shooting 8) Troubleshooting CH32, CH33, CH40 Error code Title Cause of error Check point & Normal condition • Discharge sensor (Inverter) temp. high • Check the discharge pipe sensor for INV. • Check the installation conditions for over loads. • Check for leakage of refrigerant. • Check if the SVC V/V is open. Note: If SVC V/V stands for service valves, please use service valves in place of SVCV/V. Discharge pipe(Constant) temp. high (105°C(221°F)↑) • Discharge sensor (Cons.) temp.
Part 4 Trouble Shooting 9) Troubleshooting CH41, CH44, CH45, CH46, CH47, CH65 Display code Title Cause of error Check point & Normal condition • Open / Short • Soldered poorly • Internal circuit error • Normal resistor : 200kΩ / at 25°C(77°F) (Unplugged) • Normal voltage : 4.5VDC / at 25°C(77°F) (plugged) Air sensor • Open / Short • Soldered poorly • Internal circuit error • Normal resistor : 10kΩ / at 25°C(77°F) (Unplugged) • Normal voltage : 2.
Part 4 Trouble Shooting Inverter/Constant Air R-T Table Temperature(˚C/˚F) Resistance(kΩ) 20/68 12.5 30/86 8 40/104 5.3 50/122 3.6 60/140 2.5 70/158 1.7 80/176 1.2 90/194 0.9 100/212 0.7 Discharge pipe R-T Table Temperature(˚C/˚F) Resistance(kΩ) 20/68 244 30/86 164.8 40/104 114 50/122 80.6 60/140 58.3 70/158 42.9 80/176 32.1 90/194 24.4 100/212 18.9 110/230 14.8 120/248 11.7 Condenser/Suction Pipe Heatsink R-T Table Temperature(˚C/˚F) Resistance(kΩ) 20/68 12.5 30/86 8 40/104 5.3 50/122 3.5 60/140 2.
Part 4 Trouble Shooting 11) Troubleshooting CH61, CH62 Display code Title Cause of error 61 Condenser pipe sensor temp. high • Condenser pipe sensor detected high temp.(65°C(149°F)) • Check the load condition. • Check the sensor of Condenser pipe sensor. 62 Heat sink sensor temp. high • Heat sink sensor detected high temp.(85°C(185°F)) • Check the fan is locked. • Check the sensor of heat sink. Check point & Normal condition Heat Sink temp.
Specifications and performance data subject to change without notice. HEAT CONTROLLER, INC.
