Ice ECUA90 User Manual

23
ECU 04/2015 rev.3
PROBLEM/SYMPTOM LIKELY CAUSE(S) CORRECTION
B. Unit runs for long periods or continu-
ously; cooling is insufcient.
1. Dirty lter or reduced airow
2. Low refrigerant.
3. Component failure.
4. Unit undersized for job.
1. Check air lter(s). Check blower operation. Remove
airow restriction.
2. Check for proper charge and possible refrigerant leak.
3. Check internal components, especially compressor for
proper operation.
4. Add additional units for greater capacity.
C. Unit cycles on high/low pressure
limit.
1. Loss or restriction of airow.
2. Restriction in refrigerant circuit.
3. Refrigerant overcharge (following
eld service)
4. Defective pressure control.
1. Check blower assembly for proper operation. Look
for airow restrictions, e.g.. the air lter. Check blower
motor and condenser fan.
2. Check for blockage or restriction, especially lter drier
and capillary tube assembly.
3. Evacuate and recharge to factory specications.
4. Check limit cutout pressures. Control is set to actuate at
approximately 60 PSIG (low pressure) and 650 PSIG (high
pressure).
D. Unit blows fuses or trips circuit
breaker.
1. Inadequate circuit ampacity.
2. Short, loose, or improper connection
in eld wiring.
3. Internal short circuit. Loose or
improper connection(s) in unit.
4. Excessively high or low supply volt-
age or phase loss (3ø only).
1. Note electrical requirements in Chapter 2 and correct
as necessary.
2. Check eld wiring for errors.
3. Check wiring in unit. See wiring and schematic dia-
grams. Test components (especially the compressor)
for shorts.
4. Note voltage range limitations specic to the com-
pressor troubleshooting section.
E. Water on oor near unit. 1. Obstruction in condensate line.
2. Obstruction or leak in condensate
pan.
3. Unit is not level.
1. Check for clog or restriction.
2. Check pan for leak or blockage.
3. Level unit.
F. No space heating or reduced heating
(units equipped with resistance ele-
ments)
1. Defective heating element(s).
2. Thermal limit open.
3. Defective heater contactor.
1. Check resistance element(s) for continuity.
2. Check continuity across thermal limit switch.
3. Check relay for proper operation. Replace if defective.

Ice ECUA90 Specifications

General

Brand	Ice
Model	ECUA90
Category	Air Conditioner
Language	English