Troubleshooting
Samsung Electronics
4-49
Checking Comp Resistance (Normal Value)
U-V
V-W
W-U
AJ020BXJ2CH
AJ024BXJ3CH
0.70~0.80Ω 0.70~0.80Ω 0.70~0.80Ω
AJ020BXS3CH
AJ***BX*4CH
AJ***BX*5CH
0.60~0.70Ω 0.60~0.70Ω 0.60~0.70Ω
4-6-6 IPM Over current error
1. Check items
1) Is the cool ant changed?
2) Is the compressor running normally?
3) Is the compressor connected correctly?
4) Are there any obstacles near the indoor and outdoor units?
2. Check procedure
Yes
Remove the obstacles and install
the unit again.
No
Is the ourdoor unit unstalled correctly?
Yes
Remove the obstacles and install
the unit again.
No
Is the resistance
between pin1 and pin3 of the fan
(CN901) over 1
㏁.
Yes
Open the valve.
No
Is the voltage
between pin4 and pin3 of the fan (CN901)
over 15V?
Yes
Check the compressor connection status.
No
Is the voltage between
pin5 and pin3 of the fan (CN901) during
the operation 1V~6V?
Yes
Yes
Yes
Yes
Replace the compressor.
Trun off the power and correct or replace
the temperature sensor location.
Trun off the power and reconnect the table.
Replace the compressor.
Replace the inverter PCB.
No
No
No
No
Is the fan running the operation mode?
Does the voltage
between pin6 and pin3 of the fan (CN901) fluctuate?
(High 5V~6V, Low:0V~1V)
Are the temperature
sensor location and the measured
value normal?
Is the resistance
value between the compressor boday and the chassis
in the range of Mega
Ω.
