12-4
TROUBLESHOOTING
SM WNGDCI 1-E.1 GB
12.3.2
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 Checkmotorwiring,ifok,
.
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
EEPROM parameters.
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