Napoleon NT Serie Instructions D'installation Et D'opération page 24

24
IOM
IOM
WARNING!
SYMPTOM
Low head
pressure;
High suction
pressure
Low suction
pressure;
Compressor cool;
Ice on indoor coil
High suction
pressure;
or fluctuating
head and suction
pressures
Pulsing noise at
expansion device
or liquid line
Registers sweat
W415-2973 / B / 07.18.22
THIS TROUBLESHOOTING GUIDE IS INTENDED FOR USE BY
QUALIFIED SERVICE PERSONNEL ONLY!
POSSIBLE CAUSE
Expansion device stuck in open
position.
Defective compressor valves.
Low indoor airflow.
Operating below
65 °F (18 C) outdoors.
o
Moisture in system.
Excessive load.
Defective compressor.
TXV hunting.
Air or non-condensables in system.
Air or non-condensables in system.
Low indoor airflow.
TABLE 4. CONT.
CORRECTION
Replace expansion device.
Replace compressor.
Increase speed of blower or reduce
restriction – replace air filter.
Add low ambient kit.
Recover refrigerant – evacuate and
recharge – replace filter drier.
Recheck load calculation.
Replace.
Check TXV bulb clamp – check air
distribution on coil – replace TXV.
Recover refrigerant, evacuate and
recharge.
Recover refrigerant, evacuate and
recharge.
Increase speed of blower or reduce
restriction – replace air filter.