13-19
TROUBLESHOOTING
SM CKDDCI 2-A.3 GB
3)b
Check motor
4)
Check motor current
3)a
Check motor
3)c
Check motor
Replacing outdoor unit fan motor -
(14.1.6
)
Replacing main board - (
14.1.13
)
13.5.10 Checking
Compressor
1) Check Compressor connections - Repair if needed.
2) Check the resistance between the three phases – all three coil resistances should be the
same:
UNIT
RESISTANCE
4HP DCR
0.788
Ω
4-5HP
0.188
Ω
6HP
0.18
Ω
3) Check the compressor current while operating to be the same on each wire - In case of abnormal
current (no current or excessive current), the problem could be of driver or compressor – if driver
is checked to be operating well (
13.5.5
), replace the compressor.
1
OFAN_UP
OFAN_DN
3
4
5
6
3
2
1
310
OFAN_UP
OFAN_DN
1
2
3
6
5
4
15
3
6
15
OFAN_UP
OFAN_DN
4
3
1
2
3
6
5
4
M
1
RED
1.0
Control voltage
Supply voltage
Control voltage
