TROUBLESHOOTING
13-4
SM PNXADCI 1-A.1 GB
No
Problem
5
4
3
2
1
28
Model A
29
Model B
30
Model C
31
Model D
13.1.3.2 Indoor unit diagnosis and corrective actions
No.
Fault
Probable Cause
Corrective Action
1
Sensor failures of
all types
Check sensor connections or
replace sensor
2
Communication
mismatch
Indoor and Outdoor
controllers are with different
versions
Replace Indoor controller
3
No Communication Communication or grounding
wiring is not good.
Check Indoor to Outdoor
wiring and grounding
4
No Encoder
Indoor electronics or motor Check motor wiring, if ok,
replace motor, if still not ok,
replace Indoor controller.
5
Outdoor Unit Fault Outdoor controller problem Switch to Outdoor
diagnostics.
6
EEPROM Not
Updated
System is using ROM
parameters and not
EEPROM parameters
No action, unless special
parameters are required for
unit operation.
7
Bad EEPROM
No action, unless special
parameters are required for
unit operation.
8
Bad
Communication
Communication quality is low
reliability
Check Indoor to Outdoor
wiring and grounding
9
Using EEPROM
data
No problem. System is using
EEPRRRROM parameters
13.1.3.3 Outdoor unit Diagnostics
For GC 9/12 DCI
No
Problem
5
4
3
2
1
1
OCT is disconnected
0
0
0
0
1
2
OCT is shorted
0
0
0
1
0
3
CTT is disconnected
0
0
0
1
1
4
CTT is shorted
0
0
1
0
0
5
HST is disconnected (when enabled)
0
0
1
0
1
6
HST is shorted (when enabled)
0
0
1
1
0
7
OAT is disconnected (when enabled)
0
0
1
1
1
8
OAT is shorted (when enabled)
0
1
0
0
0
9
TSUC is disconnected (when enabled)
0
1
0
0
1
10 TSUC is shorted (when enabled)
0
1
0
1
0
