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TROUBLESHOOTING GUIDE
13
DANGER
ELECTROCUTION HAZARD
Never attempt to repair or perform maintenance on
the unit until the main electrical power has been
disconnected.
PROBLEM
Unit does not operate and
electronic display is blank.
No interior light
Electronic display is blank and
interior light is OFF with door OPEN.
Electronic display is blank and
interior light is ON with door OPEN.
Electronic display shows repeating,
randomly flashing symbols and
partial characters.
Electronic display shows:
0, 1 to 26, or 99.
Electronic display shows E3.
Electronic display shows one or
more of the following:
E1, E2, E4, E5, E6, E7, E8, E9, E10, P1.
Unit not cold enough. Check
temperatures (See OPERATION for
approximate temperatures).
Unit is too cold. Check temperatures
(See OPERATION for approximate
temperatures)
The unit frosts up.
14
POSSIBLE CAUSE
No electrical supply
Loose or burned out bulb
Unit is in blackout lighting mode.
A display function has changed.
A factory control mode has been
inadvertently entered.
A factory control mode has been
inadvertently entered.
Door has been left open longer than
20 minutes.
The unit is displaying an error code.
Control set too warm
Airflow to front grille blocked
Dirty condenser coils
Door gasket not sealing properly
Inaccurate temperature reading
Control set too cold
High ambient temperatures or
humidity
Door gasket not sealing
2275ZWC & 2275ZWCOL
REMEDY
Plug unit in or check circuit breaker.
Tighten or replace bulb (See MAINTENANCE; LIGHT
BULB REPLACEMENT).
Exit blackout mode)
(See OPERATION; INTERIOR LIGHT CONTROL).
Touch and hold the left display warmer temperature
button and touch and release the POWER button three
times, then release the temperature button. The display
should become visible.
Touch and hold the left display warmer temperature
button and touch and release the LIGHT button three
times, then release the temperature button to exit the
factory control mode. The set-point temperature should
now be displayed.
Repeatedly touch the left display warmer temperature
button to advance any number shown to 99 and touch
and release the LIGHT button. The set-point
temperature should now be displayed.
Close door completely. The set-point temperature
should now be displayed.
Record the error code(s) displayed and call for service.
Set control to a cooler setting (See OPERATION;
ADJUSTING SET-POINT TEMPERATURE). Allow 24 hours
for temperature to stabilize.
Airflow must not be obstructed to front grille (See
OPERATION; CONDENSER CLEANING).
Clean condenser (See MAINTENANCE; CONDENSER
CLEANING).
Door adjustment required (See MAINTENANCE; DOOR
ALIGNMENT CHECK AND ADJUSTMENT).
Properly check temperature (See OPERATION;
CHECKING PRODUCT TEMPERATURE).
Set control to a warmer setting (See OPERATION;
ADJUSTING SET-POINT TEMPERATURE). Allow 24 hours
for temperature to stabilize.
Defrost unit manually (See MAINTENANCE;
DEFROSTING).
Adjust door (See MAINTENANCE; DOOR ALIGNMENT
CHECK AND ADJUSTMENT).
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