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KOLDWAVE KOMPAC SERIES (KOOLETTE, KOMPAC, AND KING KOMPAC)
TROUBLE SHOOTING GUIDE
Service other than routine maintenance should be performed only by a qualified refrigeration serviceman. In
service troubleshoooting, there is no substitute for a good understanding of the Kompac Series modes of
operation, control systems, components and safety systems.
PROBLEM POSSIBLE CAUSE REMEDY
1. Power interruption.
2. Thermostat not operating.
1. Low voltage.
2. Thermostat.
3. Hi pressure or freeze control (heat
pump models) tripping compressor.
4. Refrigerant leak; no gas.
5. Loose or defective wires.
6. Stuck compressor.
7. Compressor shorted, open or
burned.
8. Shorted or open run capacitor.
9. Defective thermostat.
1. Faulty rocker switch.
2. Open fan motor coil circuit.
3. Shorted or open fan motor
capacitor on King Kompac models.
1. Improper sizing of unit.
2. Insufficient air flow through
evaporator due to:
a) Dirty air filter in unit.
b) Dirty evaporator.
c) Ice on evaporator coil.
d) Obstructed intake.
The entire unit does not operate.
Fan runs but compressor does not start.
Compressor starts and runs, but fan
does not run.
Insufficient cooling.
1. Check external supply power.
Check for blown fuses or tripped
circuit breakers. Replace or reset if
necessary.
2. Setting may be too high; check unit
and reset. Thermostat may be out of
calibration or otherwise defective;
replace. Also check for loose
connection.
1. Check power supply for proper
voltage at unit; ± 10% of rated
nameplate voltage.
2. Check the control unit for loose
wires.
3. Check for loose wire connection,
broken or burned contacts. If switch
is defective, replace.
4. Locate leak, repair, evacuate and
recharge unit.
5. Tug on wires to see if they will
separate from connections. Replace
terminals if necessary.
6. Try a start capacitor across the run
capacitor momentarily (three
seconds).
7. Check for shorts, opens and
grounds. Remove and replace
compressor.
8. Remove or replace.
9. Replace; check location of
thermostat bulb. Make certain that it
does not touch evaporator coil.
1. Replace.
2. Replace fan motor.
3. Replace fan motors.
1. Check if the unit is undersized for
the load. Add supplemental unit(s).
2. Correct as follows:
a) Clean filter (see “Preventative
Maintenance” section of this
manual.
b) Unusual condition requires
cleaning.
c) Defrost; use fan only by
depressing the upper rocker
switch to right. Check for
refrigeration leaks.
d) Remove obstruction.
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