13-5
TROUBLESHOOTING
SM PNXDCI 1-A.1 GB
No.
Fault
Probable Cause
Corrective Action
14
The outdoor fan
does not function
correctly.
Check the voltage
between indoor fan
terminals on the main
P.C.B.
There is voltage between
outdoor fan terminals on
the outdoor unit.
There is no voltage
between outdoor fan
terminals on the outdoor
unit.
- If there is no voltage
replace main P.C.B
- Replace capacitor or motor.
- Check and repair electrical
wiring between indoor and
outdoor units.
15
The compressor
does not start up.
Check voltage on
compressor terminals on
the outdoor unit. (with
ampmeter)
Check if there is correct
voltage between
compressor terminals on
the outdoor unit.
-If no voltage replace main
P.C.B.
- If low voltage repair power
supply.
-If the voltage corrrect
replace capacitor or
compressor.
-If there is no voltage repair
electrical wiring between
indoor and outdoor units.
16
The refrigeration
system does not
function correctly.
Check for leaks or
restrictions, with
ampmeter, pressure guage
or surface thermometer.
- Repair refrigeration system
and charge refrigerant if
necessary.
17
No cooling or
heating only indoor
fan works.
Outdoor fan motor faulty
or other fault caused,
compresssor overload
protection cut out.
-Replace P.C.B.
- Outdoor fan blocked
remove obstructions.
18
Only indoor fan
and compressor
working.
Outdoor fan blocked.
- Remove obstructions.
19
Only indoor fan
working.
-Run capacitor of outdoor
fan motor faulty.
-Windings of outdoor fan
are shorted.
- Replace capacitor.
-Replace motor.
CONTENTS
