Troubleshooting
124
Samsung Electronics
4-4-77 Inverter Overcurrent error
Outdoor unit display
(INVERTER1 PCB)
(INVERTER2 PCB)
Judgment Method
∙ Will occur if the overcurrent flowing in the IPM.
∙ Detected by H/W or S/W
Cause of problem
∙ Installation defective
∙ Comp. defective
∙ PCB defective
∙ Connection wire error
∙ Motor defective
Power Off
Continue
Yes
Is the outdoor unit installed properly?
Remove the obstacles and check
the status of the installation.
No
Yes
Is temperature
sensor location and the measurement
value normally?
Power Off, and then replacement
or correction of the sensor location
No
Yes
Is the resistance value
between phase of Compressor wire
(U-V, V-W, W-U) less than 2Ω?
Replace Compressor
No
Yes
Is the resistance between
the body of Compressor and
chassis MΩ?
Replace Compressor
No
Yes
Does the Compressor
connection wire properly connect
to the compressor?
Check the connection wire
(Check the status of the connection UVW)
No
1. Cause of problem
