Samsung DVM S ECO BIG Series Service Manual page 77

■ Error due to overcurrent of Fan2. (E-378) /
V-limit error on Fan2 of compressor. (E-389) /
Error due to overcurrent of Fan1. (E-478) /
V-limit error on Fan1 of compressor. (E-489)
Outdoor unit Display
Judgement Method
Cause of problem
Is the outdoor unit
installed properly?
Is the resistance
value between different
phases of compressor
(U ↔ V, V ↔ W,W ↔ U)
less than 10Ω?
Is the resistance
between the body of
Fan Motor and chassis
Does the Fan Motor
connection wire
properly connect to the
compressor?
FAN Replace PCB .
Samsung Electronics
• Occurs when overcurrent flows in the IPM.
• Detected by H/W or S/W
• Installation defective
• Connection wire error
• Comp. defective
• Motor defective
• PCB defective
Power Off
Yes
Yes
MΩ?
Yes
Yes
E-378 / E-389 / E-478 / E-489
No
Reinstall after removing obstacle.
No
Outdoor Fan Motor.
No
Outdoor Fan Motor.
Check the connection wire
(Check the status of the connection U V W )
Troubleshooting
4-35