24
TROUBLESHOOTING - TO BE PERFORMED BY TRAINED SERVICE PROVIDERS ONLY, CONTINUED
CONDITION
TROUBLESHOOTING
Digital Control Display Is
Blank
Check that the MAIN power switch is on (self-contained units only).
Check the circuit breaker box for tripped circuits.
System Is Not Operating
Check that the utility power is on.
Check that the MAIN power switch is on (self-contained units only).
Check the circuit breaker box for tripped circuits.
Control Display Is
Flashing
See your case’s thermostat label (near temperature controller) for your
model’s required settings.
Case Is Not Holding
Temperature
If a large amount of warm product was added to the case, it will take time for
the temperature to adjust. Unit needs product to be pre-chilled.
Temperature changes during defrost mode but will return to normal. Fourth
LED will indicate defrost cycle in progress.
Check that case is not in sun or near a heat or air-conditioning vent.
If case is located near outside doors, temperature fluctuation can hinder unit’s
ability to maintain temperature. See
OVERVIEW / TYPE / COMPLIANCE /
WARNINGS / PRECAUTIONS / WIRING / PLUGS
-
PAGE 2 of 2
in
manual for adverse conditions/spacing issue parameters.
Check that condenser coil has been cleaned.
Check that magnetic air filter (attached to rear grille) has been cleaned.
See
GENERAL CLEANING SCHEDULE
-
TO BE PERFORMED BY STORE
PERSONNEL)
section in operating manual for instructions.
Check return air grilles for obstructions.
Check sight glass for flashing and/or low charge.
Check set point temperature; it may be adjusted too high.
Condensing Unit Is Not
Operating
Check that the power is turned on.
Determine if temperature controller settings are properly set.
See your case’s
serial label for your model’s specified settings. See SERIAL LABEL
LOCATION & INFORMATION LISTED / TECH INFO & SERVICE
section in
manual
for label location, etc.
