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SERVICE PARTS INFORMATION 4
Inverter PCB
Noise Filter PCB
Diagnose Inverter PCB and Filter PCB
Is Fuse (30A/500V) open?
YES
Check Filter PCB
(1) If there is loose connector or incorrect
wiring, correct it and replace Fuse.
(2) Check shortage or corrosion on Filter
PCB.
NO
Check Voltage at Filter PCB
Is the correct voltage to Inverter PCB
appearing at the connector?
>> If AC380V is appeared between each
terminals of LO1,LO2,LO3, it is normal.
YES
Check Inverter PCB
(1) If there is loose connector or incorrect
wiring, correct it and replace Fuse.
(2) Check shortage or corrosion on Filter
PCB.
NO
Check Inverter PCB Voltage
Is Voltage to Capacitor normal?
>> If DC586.8V(±10V) is appearing at
terminals TB-P2, TB-N1, it is normal.
YES
Check Voltage from Main PCB
Is DC16.5V appearing at connector
CN32 (3-4) on Main PCB?
NO
Main PCB circuit defective
Replace Main PCB
Inverter PCB circuit defective
Replace Inverter PCB
Check Voltage at Filter PCB
(1) Is Voltage from terminal normal?
>> If AC380V does not appear between
each terminal of LI1,LI2,LI3, check if
terminal connection is loose.
(2) Is Voltage to Inverter PCB appearing
at the connector?
>> If AC380V does not appear between
each terminals of LO1,LO2,LO3, the
NO
circuit inside PCB can be considered as
defective. (Replace Filter PCB.)
YES
Filter PCB circuit defective
NO
YES
Check Inverter PCB Voltage
Is Voltage to Capacitor OK?
>> If DC586.8V(±10V) is appearing at
NO
terminals TB-P2, TB-N1, it is normal.
Check Electric parts of Inverter unit
Check Resistor,Cement (for surge prevention)
(PARTS INFORMATION 13)
>> If Resistor,Cement is defective,
YES
replace Inverter PCB and Resistor,Cement.
Check Reactor (PARTS INFORMATION 14)
>> If Reactor is defective, replace it.
Check Diode Bridge (PARTS INFORMATION 15)
>> If DIode Bridge is defective, replace Inverter PCB.
Check Voltage from Main PCB
Is DC16.5V appearing at connector
CN32 (3-4) on Main PCB?
>> If it does not appear, Main PCB
circuit may be defective.(Replace Main
PCB.) If the voltage is normal, check
Inverter Compressor.
06-91
Replace Filter PCB
Replace Filter PCB
Replace Inverter PCB
NO
OK
YES
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Table of Contents
Troubleshooting
