20
TROUBLESHOOTING GUIDE
The following steps and procedures are recommended for correcting the problems
indicated. In the event that the problem can not be corrected, service may be required.
PROBLEM: UNIT DOES NOT POWER UP
CAUSE: Power interruption
REMEDY:
Check external power supply making sure that the disconnect is ON.
Check for blown fuses or tripped circuit breakers. Reset or replace if needed.
CAUSE: LCDI has tripped
REMEDY:
Check LCDI and reset LCDI on power cord.
CAUSE: Loose display cable
REMEDY:
Re-seat display cable at display and power module.
PROBLEM: EVAPORATOR FAN RUNS BUT COMPRESSOR AND
CONDENSER FAN DO NOT START
Note
—there is a time delay for the compressor
CAUSE: SET POINT
— setting may be too high for cooling.
REMEDY:
Make sure set-point is adjusted accordingly. You should see a red dot to the
right of the temperature display indicating compressor ON.
CAUSE: Loose Display Cable
REMEDY:
Examine the control unit for loose wires. Tighten any loose connections.
CAUSE: Condition Alarm—”CON”.
REMEDY:
Check condensate tank and empty tank, or check condensate pump (if
equipped), and make sure pump is working properly, and that there is no restriction in the
drain line from the pump.
CAUSE: High Pressure Cut-Out—”CON”
Check High Pressure Cut-out Switch.
REMEDY:
Press Reset and clear away any obstructions to the condenser intake or
condenser discharge.
CAUSE: Defective Power Module
REMEDY:
Replace Power Module.
