Operating Instructions and Installation
4-20
Samsung Electronics
Troubleshooting
4-3-9 IPM and over current error
1. Inspection items
1) Is refrigerant filled?
2) Is the compressor operating without a problem?
3) Is the compressor connected properly?
4) Are there any obstacles around the indoor/outdoor units?
2. Inspection order
Yes
Yes
Yes
Yes
Yes
Reinstall after removing obstacles
No
Are outdoor/indoor units
installed correctly?
No
Tighten the screws firmly
Are screws fasten in PBA?
(IPM, DIODE, B/D, IGBT)
No
Check the connection status of the compressor
Is the compressor
connection line properly connected to the
compressor?
No
Resistance replacement
Are the values for
current sensing resistance within
R418-19m
Ω
-21m
Ω
No
Open valves
Is service valve completely opened?
Yes
No
Compressor replacement
Is resistance value of the
different compressor phases
(U
V, V
W, W
U)
less than 2Ω?
(continued on the back)
Continue
