Electra WNG 50 DCI Service Manual page 84

TROUBLESHOOTING
13.3.2 Indoor unit diagnosis and corrective actions
No. Fault
Sensor failures of all
1
types
Communication
2
mismatch
No Communication
3
No Encoder
4
5 Outdoor Unit Fault
EEPROM Not
6
Updated
Bad EEPROM
7
Bad Communication Communication quality is low reliabilityCheck Indoor to Outdoor wiring
8
Using EEPROM
9
data
13.3.3 Outdoor Unit Diagnostics
No Problem
1 OCT is disconnected
2 OCT is shorted
3 CTT is disconnected
4 CTT is shorted
5 HST is disconnected (when enabled)
6 HST is shorted (when enabled)
7 OAT is disconnected (when enabled)
8 OAT is shorted (when enabled)
9 TSUC is disconnected (when enabled)
10 TSUC is shorted (when enabled)
11 IPM Fault
12 Bad EEPROM
13 DC under voltage
14 DC over voltage
15 AC under voltage
16 IDU/ODU Communication mismatch
17 No Communication
18 Reserved
20 Heat sink Over Heating
21 Deicing
22 Compressor Over Heating
23 Compressor Over Current
24 No OFAN Feedback
25 OFAN locked
26 Compressor Lock
27 Bad Communication
1 - ON, 0 - OFF
Only one code is shown. Order of priorety is 1-24. Diagnostics is continuously ON as long
power is on.
13-4
Probable Cause
Indoor and Outdoor controllers are
with different versions
Communication or grounding wiring is
not good.
Indoor electronics or motor
Outdoor controller problem
System is using ROM parameters and
not EEPROM parameters
No problem. System is using
EEPRRRROM parameters
5 4
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 1
0 1
0 1
0 1
0 1
0 1
0 1
0 1
1 0
1 0
1 0
1 0
1 0
1 0
1 0
1 1
1 1
1 1
1 1
Revision Y05-02
CONTENT
Corrective Action
Check sensor connections or
replace sensor
Replace Indoor controller
Check Indoor to Outdoor wiring
and grounding
Check motor wiring, if ok,
replace motor, if still not ok,
replace Indoor controller.
Switch to Outdoor diagnostics.
No action, unless special
parameters are required for
unit operation.
No action, unless special
parameters are required for
unit operation.
and grounding
3 2 1
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1
0 0 0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1
0 0 0
0 0 1
0 1 0
1 0 0
1 0 1
1 1 0
1 1 1
0 0 0
0 0 1
0 1 0
0 1 1
Service Manual - WNG 50_60_80 DCI