Napoleon 13 SEER Installation And Operating Instructions Manual - page 23
23
IOM
W415-1395 / C / 06.26.2017
POSSIBLE CAUSE
CORRECTION
Unit will not operate Power disconnected or loose connection
Check voltage at contactor in condensing unit
Blown fuse / breaker tripped
Replace fuses / reset breaker
Thermostat out of calibration is set too high Reset
Contactor defective
Check for 24VAC at contactor coil, replace if open
Transformer defective
Check wiring – replace transformer
High pressure control open (if provided)
Reset – see high pressure connection (high pressure
control opens at 600 psig)
Outdoor fan on;
Compressor off
Run or start capacitor defective
Replace
Start relay defective
Replace
Loose wire
Check for correct voltage at compressor – check
and tighten all connections
Compressor stuck, grounded or open motor
winding, open internal overload
Wait at least 2 hours for overload to reset; if still
open, replace the compressor
Too little cooling
Low voltage condition
Add start kit components
Improperly sized unit
Recalculate load
Improper indoor airflow
Check-should be approximately 400 CFM per ton
Incorrect refrigerant charge
Charge per procedure in installation manual
Air, non-condensables or moisture in
system
Recover refrigerant
Compressor
operates in short
cycles
Incorrect voltage
At compressor terminals, voltage must be +/10% of
nameplate marking when unit is operating
Defective overload protector
Replace – check for correct voltage
Refrigerant undercharge
Add refrigerant
High head pressure;
Low suction
pressure
Restriction in liquid line, expansion device
or filter drier
Remove or replace defective component
Lack of sufficient indoor airflow
Clean/check filters, registers, or evaporator coil
that may cause a restriction.
High head pressure;
Normal suction
pressure
Dirty outdoor coil
Clean coil
Refrigerant overcharge
Correct system charge
Outdoor fan not running
Repair or replace
Air or non-condensables in system
Recover refrigerant, evacuate and recharge
Low head pressure;
High suction
pressure
Expansion device stuck in open position
Replace expansion device
Defective compressor valves
Replace compressor
Low suction
pressure;
Compressor cool;
Ice on indoor coil
Low indoor airflow
Increase speed of blower or reduce restriction –
replace air filter
Operating below 65degF outdoors
Add low ambient kit
Moisture in system
Recover refrigerant – evacuate and recharge –
replace filter drier
High suction
pressure;
or luctuating head
and suction
pressures
Excessive load
Recheck load calculation
Defective compressor
Replace
TXV hunting
Check TXV bulb clamp – check air distribution on
coil – replace TXV
Air or non-condensibles in system
Recover refrigerant, evacuate and recharge
Pulsing noise at
expansion device or
liquid line
Air or non-condensibles in system
Recover refrigerant, evacuate and recharge
Registers sweat
Low indoor airflow
Increase speed of blower or reduce restriction –
TABLE 4. CONT.