FEATURES Function - Starting Control • A minimum torque is provided during start up. • When target frequency > 85Hz, – 40Hz for one min and at 85Hz for 1 min (2 nd Platform Freq) Technical Training Technical Training Technical Training 85Hz (1 st Platform Freq) 40Hz 0 1 min 1 min • When target frequency > 40Hz, – 40Hz for one min. Inverter Control Inverter Control Inverter Control
FEATURES Function - Starting Control 40Hz Technical Training Technical Training Technical Training 0 1 min • When target frequency is < 40Hz, – 40Hz for one min Inverter Control Inverter Control Inverter Control
FEATURES Function - Cool Mode • When Tr >= Ts + 1°C - Comp, ID Fan and OD Fan ON • When Tr <= Ts - 1°C - Comp and OD Fan OFF - ID Fan remain ON Technical Training Technical Training Technical Training Tr = Room Temperature Ts = Set Temperature Inverter Control Inverter Control Inverter Control
FEATURES Function - Cool Mode • At beginning of cooling operation, compressor operate at higher frequency to reduce the room temperature. • When set temperature is achieved, operation frequency will be reduced to stabilize the room temperature. Technical Training Technical Training Technical Training Inverter Control Inverter Control Inverter Control
FEATURES When will Compressor Stop? • When cooling load is too small, even with lowest operation frequency, room temperature still fall below compressor cut off point, compressor will stop. Compressor Technical Training Technical Training capacity Technical Training Lowest Freq Time Time Tr <= Ts <= Ts - - 1°C 1°C Tr Comp will stop Comp will stop Inverter Control Inverter Control Inverter Control
FEATURES Function - Dry Mode • When Tr > Ts + 2°C (Unit operates in Cooling mode) • When Tr <= Ts + 2°C (Unit enters Dry operation) - Compressor will run at 30Hz and 60Hz alternately. - ID Fan run at low speed. 6 min 10 min Technical Training Technical Training Technical Training 60 Hz 30 Hz 60 Hz • When Tr < Ts - 2°C - Comp & OD Fan Off - ID Fan On Inverter Control Inverter Control Inverter Control
FEATURES Function - Heating Mode • Ts = Ts_user + 3°C • When Ts >= Tr + 1°C - Comp, 4WV and OD Fan ON • When Ts <= Tr – 1°C - Comp, 4WV and OD Fan OFF - Indoor Fan run at low speed for 40 sec and OFF Technical Training Technical Training Technical Training Inverter Control Inverter Control Inverter Control
FEATURES Function - Heating Mode • At beginning of heating operation, compressor operate at higher frequency to increase the room temperature. • When set temperature is achieved, operation frequency will be reduced to stabilize the room temperature. Technical Training Technical Training Technical Training Inverter Control Inverter Control Inverter Control
FEATURES When will Compressor Stop? • When heating load is too small, even with lowest operation frequency, room temperature still rises above compressor cut off point, compressor will stop. Compressor Technical Training Technical Training capacity Technical Training Lowest Freq Time Time Ts+1°C <= Tr Tr Ts+1°C <= Comp will stop Comp will stop Inverter Control Inverter Control Inverter Control
FEATURES Function - Heating Mode Cold Air Prevention Control • Ti_coil < 23°C (ID Fan Stop) • Ti_coil >= 28°C (ID Fan Run at Low Speed) • Ti_coil >= 38°C (ID Fan Run at User Set Speed) Technical Training Technical Training Technical Training Inverter Control Inverter Control Inverter Control
FEATURES Function - Auto Mode • Room temperature >= 23°C – Cool mode – Features of cool mode • Room temperature < 23°C – Heat mode – Features of heat mode Technical Training Technical Training Technical Training Inverter Control Inverter Control Inverter Control
FEATURES Function - Auto Fan (Cool Mode) Tr - - Ts (°C) Ts (°C) Tr 3 3 2 2 1 1 Technical Training Technical Training Technical Training 0 0 L L M M H H M M L L Inverter Control Inverter Control Inverter Control
FEATURES Function - Auto Fan (Heat Mode) Ts - - Tr Tr (°C) (°C) Ts 3 3 2 2 1 1 Technical Training Technical Training Technical Training 0 0 L L M M H H M M L L Inverter Control Inverter Control Inverter Control
FEATURES Function – Outdoor Fan Speed Control (Single Split) Cooling Operation Cooling Operation • • When outdoor temperature is low, outdoor fan motor will run at When outdoor temperature is low, outdoor fan motor will run at low speed to reduce noise level. . low speed to reduce noise level T ambient Technical Training Technical Training Technical Training 29 ˚ C 26 ˚ C 20 ˚ C 16 ˚ C Fan Speed L H L Inverter Control Inverter Control Inverter Control
FEATURES Function – Outdoor Fan Speed Control (Single Split) Cooling Operation Cooling Operation • • When Fan Speed is running at Low fan Low fan, O/D coil sensor will , O/D coil sensor will When Fan Speed is running at determine whether the fan speed need to be increased back or determine whether the fan speed need to be increased back or not (to ensure Capacity). not (to ensure Capacity). T o_coil Technical Training Technical Training Technical Training 37 ˚ C 35 ˚ C 30 ˚ C 28 ˚ C Fan Speed L H L Inverter Control Inverter Control Inverter Control
FEATURES Function – Outdoor Fan Speed Control (Single Split) Heating Operation Heating Operation • • When outdoor temperature is low, outdoor fan motor will run at When outdoor temperature is low, outdoor fan motor will run at high speed high speed T ambient 17 ˚ C Technical Training Technical Training Technical Training 15 ˚ C 11 ˚ C 9 ˚ C Fan Speed L H L Inverter Control Inverter Control Inverter Control
FEATURES Function – Outdoor Fan Speed Control (Multi Split) Cooling Operation Cooling Operation • • When outdoor temperature is low, outdoor fan motor will run at When outdoor temperature is low, outdoor fan motor will run at low speed to reduce noise level. . low speed to reduce noise level T ambient Technical Training Technical Training Technical Training 29 ˚ C 26 ˚ C 20 ˚ C 16 ˚ C Fan Speed L M H M L Inverter Control Inverter Control Inverter Control
FEATURES Function – Outdoor Fan Speed Control (Multi Split) Cooling Operation Cooling Operation • • When Fan Speed is running at Medium or Low fan Medium or Low fan, O/D coil , O/D coil When Fan Speed is running at sensor will determine whether the fan speed need to be sensor will determine whether the fan speed need to be increased back or not (to ensure Capacity). increased back or not (to ensure Capacity). T o_coil Technical Training Technical Training Technical Training 37 ˚ C 35 ˚ C 30 ˚ C 28 ˚ C Fan Speed L M H M L Inverter Control Inverter Control Inverter Control
FEATURES Function – Outdoor Fan Speed Control (Multi Split) Heating Operation Heating Operation • • When outdoor temperature is low, outdoor fan motor will run at When outdoor temperature is low, outdoor fan motor will run at high speed high speed T ambient 17 ˚ C 15 ˚ C Technical Training Technical Training Technical Training 11 ˚ C 9 ˚ C Fan Speed L M H M L Inverter Control Inverter Control Inverter Control
FEATURES Function - Turbo Function • Turbo function is not available in Auto and Fan mode. • If higher cooling or heating is required during operation, press “Turbo” button on the remote control to increase the cooling or heating capacity to maximum. • When activated, the set temperature will be: Technical Training Technical Training Technical Training – Reduced by 3°C for Cool mode – Reduced by 3°C for Dry mode – Increased by 3°C for Heat mode Inverter Control Inverter Control Inverter Control
FEATURES Function - Defrost Operation • Only available in Heat mode. • Activated when controller detect difference between outdoor coil temp (To_coil) and outdoor air temp (Ta) • Condition for entering defrost operation a) Comp run time > 20 min, Ta > 5°C & To_coil <= -3°C for 5 min OR Technical Training Technical Training Technical Training b) Comp run time > 20 min, Ta - To_coil >= 7°C for 5 min OR C) Ta <= -15°C & compressor run time >= 3 hours Inverter Control Inverter Control Inverter Control
FEATURES Function - Defrost Operation During Defrost Operation 1. Comp reduces speed to 30Hz 2. 4WV off 3. Outdoor Fan stop Technical Training 4. Comp will increase speed to 90Hz Technical Training Technical Training 5. Indoor Fan off under “Cold Prevention Function” Inverter Control Inverter Control Inverter Control
FEATURES Function - Defrost Operation Defrost Termination • Timer Control - Defrost operation = 8 min • Temperature Control - To_coil >= 14°C Technical Training Technical Training Technical Training Inverter Control Inverter Control Inverter Control
FEATURES Function - Defrost Operation 30 Hz 90 Hz COMP COMP ON ON OFF OFF ON ON OD fan OD fan OFF OFF ID fan ID fan ON ON OFF OFF Technical Training Technical Training Technical Training 4WV 4WV ON ON OFF OFF 28s 28s 2s 2s 6min 6min 2min 2min 50s 50s 10s 10s Heating Mode Defrost Cycle Defrost Heating Mode Heating Mode Defrost Cycle Defrost Heating Mode Terminate Terminate Inverter Control Inverter Control Inverter Control
FEATURES Protection Control – Compressor • 3 minutes Minimum OFF time Technical Training Technical Training Technical Training Inverter Control Inverter Control Inverter Control
FEATURES Protection Control - Oil Return • During low frequency operation, oil might be trap in the system. The controller will ensure that the oil is properly return. • If the compressor has been continuously operating below 50Hz for 1 hour, the compressor will operate at 60Hz for 2 minutes to assist oil return. Technical Training Technical Training Technical Training Inverter Control Inverter Control Inverter Control
FEATURES Protection Control - Current Control Current Detector Technical Training Technical Training Technical Training Multi Split Inverter Control Inverter Control Inverter Control
FEATURES Protection Control - Current Control (Single Split) Total Current Compressor stops Compressor stops I2 Frequency step down Frequency step down I1 Normal Operation Normal Operation Technical Training Technical Training Technical Training 1 HP 1.5 HP Total Current Cooling Heat Pump Cooling Heat Pump I1 8.5 A 9.5 A 9.5 A 10.0 A I2 12.5 A 13.5 A 13.5 A 14.0 A Inverter Control Inverter Control Inverter Control
FEATURES Protection Control - Current Control (Multi Split) Current Limit Selection Current Limit Selection Technical Training Technical Training Technical Training Inverter Control Inverter Control Inverter Control
FEATURES Protection Control - Current Control (Multi Split) Current Limit Selection Current Limit Selection Technical Training Technical Training Technical Training Inverter Control Inverter Control Inverter Control
FEATURES Protection Control - Current Control (Multi Split) For 2 x WMX10G @ OD 30°C< air temp < 40°C (With Current Limit = 17A) 17A) For 2 x WMX10G @ OD 30°C< air temp < 40°C (With Current Limit = Total Current Compressor stops Compressor stops I2 Frequency step down Frequency step down I1 Technical Training Technical Training Technical Training Normal Operation Normal Operation Total Current Total Current I1 13 A Rated Running Current I1 13 A Rated Running Current I2 I2 14.3 A 14.3 A = 13A * 110% = 13A * 110% Inverter Control Inverter Control Inverter Control
FEATURES Protection Control - Compressor Discharge Temperature Control Compressor Compressor Discharge Discharge Temperature Temperature Compressor stops Compressor stops 115°C Frequency step down Frequency step down 100°C Technical Training Technical Training Technical Training Maintain frequency 85°C No limit No limit Inverter Control Inverter Control Inverter Control
FEATURES Protection Control - Low Refrigerant (Gas Leak) • Low refrigerant is checked by compressor discharge temperature. When there is a leak, compressor will operate at high discharge temperature. Technical Training Technical Training Technical Training Inverter Control Inverter Control Inverter Control
FEATURES Protection Control - Outdoor Coil Overload Control • The outdoor coil overload control is performed in Cool and Dry mode. Outdoor Coil Temperature Compressor stops > 70°C for 30 sec continuously Compressor stops 70°C Technical Training Technical Training Technical Training Frequency step down 60°C Maintain frequency 50°C No limit Inverter Control Inverter Control Inverter Control
FEATURES Protection Control - Indoor Coil Overload Control • The indoor coil overload control is performed in Heat mode. Indoor Coil Temperature Compressor stops > 70°C for 30 sec continuously Compressor stops 70°C Technical Training Technical Training Technical Training Frequency step down 52°C Maintain frequency 46°C No limit Inverter Control Inverter Control Inverter Control
FEATURES Protection Control - Indoor Coil Anti-freeze • The indoor coil Anti-freeze is performed in Cool Mode. Indoor Coil Temperature No limit 10°C Technical Training Technical Training Technical Training Maintain frequency 7°C Frequency step down -1°C < -1°C for 5 min continuously Compressor stops Compressor stops Inverter Control Inverter Control Inverter Control
FEATURES Protection Control - Data Communication Error Between Indoor and Outdoor (Single Split) • Indoor controller board will transmit signal to Outdoor controller board every 2 second. • If the data communication line between indoor and outdoor occurs error for 30 seconds continuously, compressor will stop. Technical Training Technical Training Technical Training Indoor A Send Signal Send Signal Acknowledge Acknowledge Outdoor Inverter Control Inverter Control Inverter Control
FEATURES Protection Control - Data Communication Error Between Indoor and Outdoor (Multi Split) Normal Operation Normal Operation Indoor A Indoor B Technical Training Technical Training Technical Training Send Signal Send Signal Acknowledge Acknowledge Outdoor Inverter Control Inverter Control Inverter Control
FEATURES Protection Control - Data Communication Error Between Indoor and Outdoor (Multi Split) Normal Operation Normal Operation Indoor A Indoor B Technical Training Technical Training Technical Training Send Signal Send Signal Acknowledge Acknowledge Outdoor Inverter Control Inverter Control Inverter Control
FEATURES Protection Control - Data Communication Error Between Indoor and Outdoor (Multi Split) Communication Error Communication Error Indoor A Indoor B No Signal No Signal Technical Training Technical Training Technical Training From From Indoor B Indoor B For 10 sec For 10 sec Outdoor Inverter Control Inverter Control Inverter Control
FEATURES Protection Control - Data Communication Error Between Indoor and Outdoor (Multi Split) Communication Error Communication Error Indoor A Indoor B Technical Training Technical Training Technical Training Will Switch to Will Switch to Indoor A and Indoor A and Communicate Communicate Outdoor Inverter Control Inverter Control Inverter Control
FEATURES Protection Control - Data Communication Error Between Indoor and Outdoor (Multi Split) Communication Error Communication Error Indoor A Indoor B Indoor B is Indoor B is Technical Training Technical Training Technical Training confirmed in ERROR confirmed in ERROR if no Signal from it if no Signal from it for 2 min 2 min for continuously continuously Outdoor Inverter Control Inverter Control Inverter Control
SELF DIAGNOSIS Technical Training Technical Training Technical Training Inverter Control Inverter Control Inverter Control
SELF DIAGNOSIS • When fault is detected during operation, it can be indicated by LED light (indoor & outdoor) • Simplify and ease the troubleshooting process Technical Training Technical Training Technical Training Inverter Control Inverter Control Inverter Control
SELF DIAGNOSIS Inverter Cooling Unit - Indoor Unit LED Indication (WMX-F series) Operation / Fault Condition Timer Sleep Power Dry Timer ON Cool mode Sleep mode ON Dry mode Indoor temperature sensors contact loose / short Outdoor temperature sensors contact loose/short Technical Training Technical Training Technical Training Gas leak / compressor overload Communication error between indoor and outdoor IPM / PFC error Outdoor total current trip / DC peak Indoor fan feedback error ON ON or OFF Blinking Inverter Control Inverter Control Inverter Control
SELF DIAGNOSIS Inverter Heatpump Unit - Indoor Unit LED Indication (WMX-F series) Operation / Fault Condition COOL DRY HEAT STANDBY TIMER Cooling mode Dry mode Stand-by / Fan mode Heat mode Auto mode Defrost operation Compressor overload protection (Current Overload) Technical Training Technical Training Technical Training Indoor temperature sensors contact loose / short Outdoor temperature senors contact loose / short Gas leak / compressor overheat Communication error between indoor and outdoor Inverter error Outdoor total current trip /DC peak Indoor fan feedback error ON ON or OFF Blinking Inverter Control Inverter Control Inverter Control
SELF DIAGNOSIS Inverter Cooling Unit - Indoor Unit LED Indication (WMX-G series) Self Diagnosis Table -- Indoor LED Display Operation / Fault Condition Sleep Mode Cool Timer Ionizer Cool mode Sleep mode ON Timer ON Ionizer ON Defrost Operation RED Indoor temperature sensors contact loose / short Technical Training Technical Training Technical Training Yellow Coil temperature sensor contact loose / short Outdoor temperature sensors contact loose/short Gas leak / compressor overload Communication error between indoor and outdoor IPM / PFC error Outdoor total current trip / DC peak Communication error between indoor and outdoor Indoor fan feedback error Inverter Control Inverter Control Inverter Control ON ON or OFF Blinking
SELF DIAGNOSIS LED Location (Single Split) Inverter Module LED (Blinking in RED) Technical Training Technical Training Technical Training IPM PCB IPM PCB Inverter Control Inverter Control Inverter Control
SELF DIAGNOSIS LED Location (Multi Split) Power PCB Technical Training Technical Training Technical Training LED Power PCB Power PCB Inverter Control Inverter Control Inverter Control
SELF DIAGNOSIS Inverter Module - Normal Running Mode LED Indication Common for Single Split & Multi Split Common for Single Split & Multi Split 1s 1s 1s Blink Indication 1# Normal 2# Under/Over Voltage Limit Technical Training Technical Training Technical Training 3# Outdoor Coil Temperature Limit 4# Total Current Limit 5# Discharge Temperature Limit 6# Indoor Coil Temperature Limit 7# Indoor Fan Speed Limit 8# Outdoor Frequency Adjustment Inverter Control Inverter Control Inverter Control
SELF DIAGNOSIS Inverter Module – Compressor Stopped LED Indication 0.5s 0.5s For Single Split For Single Split 0.5s Blink Errors Corrective Action 1# Outdoor Sensor Problem Check ambient sensor wire and connection 2# Coil Sensor Problem Check coil sensor wire and connection Technical Training Technical Training Technical Training 3# Discharge Sensor Problem Check discharge sensor wire and connection / Not enough refrigerant / Indoor overload 4# DC Compressor Feedback Call local dealer 5# Communication Error Check Interconnection communication wire Inverter Control Inverter Control Inverter Control
SELF DIAGNOSIS Inverter Module – Compressor Stopped LED Indication Blink Errors Corrective Action 6# Over Current Call local dealer 7# No Load Check compressor wire and connection Technical Training Technical Training Technical Training 8# Under/Over Voltage Check power supply 9# DC Compressor Start Failure Compressor fail to start 10# Cooling Overload Check whether outdoor unit is blocked or not Inverter Control Inverter Control Inverter Control
SELF DIAGNOSIS Inverter Module – Compressor Stopped LED Indication Blink Errors Corrective Action 11# Defrost Wait till defrost is over then it will - - - NA - - - restart automatically 12# IPM Protection Check DC supply on IPM board Technical Training Technical Training Technical Training 13# EEPROM Reading Error Change EEPROM 14# EEPROM Writing Error Change EEPROM Inverter Control Inverter Control Inverter Control
SELF DIAGNOSIS Inverter Module – Compressor Stopped LED Indication For Multi Split For Multi Split Blink Errors Corrective Action 1# Outdoor Sensor Problem Check ambient sensor wire and connection 2# Coil Sensor Problem Check coil sensor wire and connection Technical Training Technical Training Technical Training 3# Discharge Sensor Problem Check discharge sensor wire and connection / Not enough refrigerant / Indoor overload - - - NA - - - 4# DC Compressor Feedback 5# Communication Error Check Interconnection communication wire Inverter Control Inverter Control Inverter Control
SELF DIAGNOSIS Inverter Module – Compressor Stopped LED Indication Blink Errors Corrective Action 6# Over Current Call local dealer 7# No Load Check compressor wire and connection Technical Training Technical Training Technical Training 8# Under/Over Voltage Check power supply - - - NA - - - 9# DC Compressor Start Failure 10# Cooling Overload Check whether outdoor unit is blocked or not Inverter Control Inverter Control Inverter Control
SELF DIAGNOSIS Blink Errors Corrective Action 11# Defrost Wait till defrost is over then it will - - - NA - - - restart automatically 12# IPM Protection Check DC supply on IPM board Technical Training Technical Training Technical Training 13# EEPROM Reading Error Change EEPROM 14# EEPROM Writing Error Change EEPROM 15# DC Fan Motor Feedback - - - NA - - - Error Inverter Control Inverter Control Inverter Control
SELF DIAGNOSIS Blink Errors Corrective Action 16# AC Peak Current Error Call local dealer 17# Outdoor Suction Sensor Error Check suction sensor wire and connection 19# DC Compressor Speed Technical Training Technical Training Technical Training - - - NA - - - Control Error 21# Outdoor Suction A Sensor Check A suction sensor wire and Error connection 22# Outdoor Suction A Sensor Check B suction sensor wire and Error connection Inverter Control Inverter Control Inverter Control
SELF DIAGNOSIS Blink Errors Corrective Action 23# Outdoor Suction C Sensor Check C suction sensor wire and Error connection 24# Outdoor Suction D Sensor Check D suction sensor wire and Error connection 31# Indoor A Communication Check Interconnection Error communication wire to Indoor A Technical Training Technical Training Technical Training 32# Indoor B Communication Check Interconnection Error communication wire to Indoor B 33# Indoor C Communication Check Interconnection Error communication wire to Indoor C 34# Indoor D Communication Check Interconnection Error communication wire to Indoor D Inverter Control Inverter Control Inverter Control
Troubleshooting Technical Training Technical Training Technical Training Inverter Control Inverter Control Inverter Control
TROUBLESHOOTING Indoor Unit -Check remote control Any “beep” No No Power ON handset sound when (Set temp to the -Check if there is any direct remote lowest for cooling; sunlight, flashing lamp control is Set temp to the shine onto the receiver. pressed? highest for -Check indoor PCB heating) Yes Yes Is indoor No -Check indoor fan motor No fan running -Check indoor PCB normally? Yes Yes Check terminal block Technical Training Technical Training Technical Training “1” and “2”. Check: -indoor sensor Is there any -wiring between indoor main No No power board and switch board supply to -indoor PCB outdoor unit? Yes Yes Check outdoor unit Inverter Control Inverter Control Inverter Control
TROUBLESHOOTING INDOOR PCB SIG 3 L 1 Relay N 2 E E Technical Training Technical Training Technical Training Single Split Multi Split 1 2 3 L N 1 2 3 L N To Outdoor From Outdoor Inverter Control Inverter Control Inverter Control
TROUBLESHOOTING Outdoor Unit (Single Split & Multi Split) • Check from Power Supply till Compressor P + N Main Board Technical Training Technical Training Technical Training Inverter Control Inverter Control Inverter Control
TROUBLESHOOTING Outdoor Unit (Single Split & Multi Split) • Check from Power Supply till Compressor P + N Main Board Technical Training Technical Training Technical Training 1) Make sure 1) Make sure power supply power supply is sufficient. is sufficient. 2) Fuse Blown? 2) Fuse Blown? Change Fuse Change Fuse Inverter Control Inverter Control Inverter Control
TROUBLESHOOTING Outdoor Unit (Single Split & Multi Split) • Check from Power Supply till Compressor P + N Main Board Technical Training Technical Training Technical Training + ~ 3) Diode Checking 3) Diode Checking • • Turn Off power & remove cables Turn Off power & remove cables • • Use a multi- Use a multi -meter and select “diode” measurement meter and select “diode” measurement • • Measure each of the diode, value should be 0.4 ~ 0.6 V Measure each of the diode, value should be 0.4 ~ 0.6 V • • If value is 0, change the diode bridge If value is 0, change the diode bridge ~ - +ve pin -ve pin Inverter Control Inverter Control Inverter Control
TROUBLESHOOTING Outdoor Unit (Single Split & Multi Split) • Check from Power Supply till Compressor P + N Main Board Technical Training Technical Training Technical Training 4) While maintaining power supply, 4) While maintaining power supply, use multi- -meter to check DC Voltage on the electrolytic capacitor OR meter to check DC Voltage on the electrolytic capacitor OR use multi the IPM board. The reading should be around 300 Vdc the IPM board. The reading should be around 300 Vdc. . (With 300Vdc, If LED is blinking for IPM error, then replace IPM) (With 300Vdc, If LED is blinking for IPM error, then replace IPM) Inverter Control Inverter Control Inverter Control
TROUBLESHOOTING Outdoor Unit (Single Split & Multi Split) • Check from Power Supply till Compressor +ve -ve Technical Training Technical Training Technical Training Electrolytic Capacitor (Multi Split Model) Inverter Control Inverter Control Inverter Control
TROUBLESHOOTING Outdoor Unit (Single Split & Multi Split) • Check from Power Supply till Compressor -ve +ve Electrolytic Capacitor Technical Training Technical Training Technical Training (Single Split Model) +ve -ve More Convenience!! IPM Board + - U V W Inverter Control Inverter Control Inverter Control
TROUBLESHOOTING Outdoor Unit (Single Split & Multi Split) • Check from Power Supply till Compressor P + N Main Board Technical Training Technical Training Technical Training 5) Check the connection wire for compressor. 5) Check the connection wire for compressor. Make sure the U,V,W are connected correctly. Make sure the U,V,W are connected correctly. Inverter Control Inverter Control Inverter Control
TROUBLESHOOTING Outdoor Unit (Single Split & Multi Split) • Check from Power Supply till Compressor P + N Main Board Technical Training Technical Training Technical Training 6) If everything is all right and the unit won’ ’t run, change t run, change 6) If everything is all right and the unit won main board / entire control box. main board / entire control box. Inverter Control Inverter Control Inverter Control
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