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12-5
TROUBLESHOOTING
SM CN 1-E.1 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)
Yes
1
0
0
0
0
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 FeedbaCN
No
1
1
0
0
0
25
OFAN loCNed
Yes
1
1
0
0
1
26
Compressor LoCN
Yes
1
1
0
1
0
27
Bad Communication
No
1
1
0
1
1
28
Missing ODU configuration
(*SW 35V14 and above)
Yes
1
1
1
0
0
29
Undefined ODU Model
(*SW 35V14 and above)
Yes
1
1
1
0
1
30
For future use
No
1
1
1
1
0
31
Operation condition is exceeded
(*SW 35V14 and above)
Yes
1
1
1
1
1
*
Alarm Output - is on SW 35V14 and above. There is no alarm on SW 35V12 and below/
12.3.4
Outdoor Unit Diagnostics and Corrective Actions
No.
Fault
Probable Cause
Corrective Action
1
Sensors failures of all
types
CheCN sensors connections
or replace sensors.
2
IPM Fault
Electronics HW problem
CheCN 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
CheCN outdoor unit power
supply voltage
5
AC under Voltage
CheCN 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.
CheCN Indoor to Outdoor
wiring and grounding
CONTENT
Summary of Contents for CN 25 DCI
Page 15: ...4 2 OUTLINE DIMENSIONS SM CN 1 E 1 GB 4 2 Outdoor Unit DCI 50 4 3 Outdoor Unit DCI 60 CONTENT ...
Page 16: ...4 3 OUTLINE DIMENSIONS SM CN 1 E 1 GB 4 4 Outdoor Unit DCI 72Z CONTENT ...
Page 44: ...8 1 WIRING DIAGRAMS SM CN 1 E 1 GB 8 WIRING DIAGRAMS 8 1 CN 25 35 50 60 70 DCI CONTENT ...
Page 92: ...13 12 EXPLODED VIEWS AND SPARE PARTS LISTS SM CN 1 E 1 GB 13 11 Outdoor Unit DCI 60 CONTENT ...
Page 94: ...13 14 EXPLODED VIEWS AND SPARE PARTS LISTS SM CN 1 E 1 GB 13 13 Outdoor Unit DCI 72Z CONTENT ...