11-5
TROUBLESHOOTING
SM SX DCI 1-A.3 GB
No Problem AO 5 4 3 2 1
10 OMT is shorted (DCI72 / 72Z / 80) Yes 0 1 0 1 0
11 IPM Fault Yes 0 1 0 1 1
12 Bad EEPROM No 0 1 1 0 0
13 DC under voltage Yes 0 1 1 0 1
14 DC over voltage Yes 0 1 1 1 0
15 AC under voltage Yes 0 1 1 1 1
16 Mismatch IDU & ODU models
(*SW 35V14 and above) Yes10000
17 No Communication Yes 1 0 0 0 1
18 Reserved No 1 0 0 1 0
20 Heat sink Over Heating No 1 0 1 0 0
21 Deicing No 1 0 1 0 1
22 Compressor Over Heating No 1 0 1 1 0
23 Compressor Over Current No 1 0 1 1 1
24 No OFAN Feedback No 1 1 0 0 0
25 OFAN locked Yes 1 1 0 0 1
26 Compressor Lock Yes 1 1 0 1 0
27 Bad Communication No 1 1 0 1 1
28 Missing ODU configuration
(*SW 35V14 and above) Yes11100
29 Undefined ODU Model (*SW 35V14 and above) Yes11101
30 For future use No 1 1 1 1 0
31 Operation condition is exceeded (*SW 35V14 and above) Yes11111
*Alarm Output - is on SW 35V14 and above. There is no alarm on SW 35V12 and below/
11.3.4 Outdoor Unit Diagnostics and Corrective Actions
No. Fault Probable Cause Corrective Action
1
Sensors failures of all
types
Check sensors connections
or replace sensors.
2 IPM Fault Electronics HW problem
Check all wiring and jumper
settings, if OK, replace
electronics.
3 Bad EEPROM
No action, unless special
parameters are required for
unit operation.
4 DC under/over Voltage Electronics HW problem
Check outdoor unit power
supply voltage
5 AC under Voltage
Check outdoor unit power
supply voltage
6
Indoor / Outdoor unit
Communication mis-
match
Indoor and Outdoor
controllers are with
different versions
Replace Indoor controller
7 No Communication
Communication or
grounding wiring is not
good.
Check Indoor to Outdoor
wiring and grounding
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