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Page 15
Troubleshooting Cooling
PROBLEM POSSIBLE CAUSE TO CORRECT
Check for voltage at compressor. 1115 volt and 230 volt
units will operate at 10% voltage variance.
Set thermostat to coldest position. Test thermostat and
replace if inoperative.
Hard start compressor. Direct test compressor. If com-
pressor starts, add starting components.
Check for continuity and resistance.
Test overload protector and replace if inoperative.
Test capacitor and replace if inoperative.
Test for continuity in all positions. Replace if inoperative.
Refer to appropriate wiring diagram to check wiring.
Low voltage.
Thermostat not set cold
enough or inoperative.
Compressor hums but cuts off
on overload.
Open or shorted compressor
windings.
Open overload.
Open capacitor.
Inoperative system switch.
Broken, loose or incorrect
wiring.
Compressor does not
run.
PROBLEM POSSIBLE CAUSE TO CORRECT
Fan motor does not
run.
Test switch and replace if inoperative.
Refer to applicable wiring diagram.
Test capacitor and replace if inoperative.
Test switch and replace if inoperative.
Test fan motor and replace if inoperative (be sure internal
overload has had time to reset).
Inoperative system switch.
Broken, loose or incorrect
wiring.
Open capacitor.
Fan speed switch open.
Inoperative fan motor.
Undersized unit.
Thermostat open or inopera-
tive.
Dirty filter
Dirty or plugged condenser or
evaporator coil.
Pool air circulation in area
being cooled.
Fresh air or exhaust air door
open on applicable models.
Low capacity - undercharge.
Compressor not pumping
properly.
PROBLEM POSSIBLE CAUSE TO CORRECT
Refer to Sizing Charts.
Set to coldest position. Test thermostat and replace if
necessary.
Clean as recommended in the Owner's Manual.
Use steam or detergents to clean.
Adjust discharge air louvers. Use high fan speed.
Close doors. Instruct customer on use of this feature.
Clean for leak and make repair.
Check amperage draw against nameplate. If not conclu-
sive, make pressure test.
Does not cool, or
cools only slightly.