Troubleshooting Guide - Sub-Zero UC-24C User Manual

Troubleshooting Guide

Troubleshooting
If your undercounter unit is not operating properly,
use the following troubleshooting guide before calling
Sub-Zero factory certified service. This guide will save you
time and trouble and may help you avoid the expense of
a service call.
Undercounter unit is not operating.
• Is the unit turned on? Refer to electronic controls on
page 7.
• Is there electrical power to the unit? Check the house-
hold fuse or circuit breaker to see if it has been blown
or tripped. A power outage may also have caused a
disruption in service.
• Is the condenser area clean?
• Has the door been left open for an extended period?
Be sure that food is not obstructing proper door
closing.
• If the unit is still not operating, it may be in defrost
mode. Wait 30 minutes and try to restart again.
'SERVICE' is flashing in the LCD display.
• This may indicate that the condenser needs cleaning.
Clean the condenser area as outlined on page 13.
• This happens when the unit runs too long. A
temperature sensor may be faulty. If this occurs, turn
the unit off with the POWER key pad and then restart
by pressing the key pad again. If 'SERVICE' is still
flashing, call Sub-Zero customer service at
800-222-7820.
Undercounter unit is warmer than usual.
• Is the temperature set properly?
• Is the condenser area clean?
• Are the airflow vents in the kickplate blocked?
• Has the door been left open for an extended period?
Be sure that food is not obstructing proper door
closing.
• Has a large amount of food been added recently?
Undercounter unit runs for long periods of time.
• Is the condenser area clean?
• Has the door been left open for an extended period?
Be sure that food is not obstructing proper door
closing.
• Has a large amount of food been added recently?
• On hot days and in warm room temperatures, the
compressor runs longer.
• There may be normal operation noises related to refrig-
erant circulation, fan operation, ice maker operation,
defrost cycle or compressor operation.
Undercounter unit is frosted up.
• Has the door been left open for an extended period?
Be sure that food is not obstructing proper door
closing.
• Is the door closing and sealing properly? Contact your
dealer if the door is not adjusted properly.
You hear unusual noises.
• These noises may be normal operating sounds related
to refrigerant circulation, fan operation, ice maker oper-
ation, defrost cycle or compressor operation. Noises
may be more noticeable when the door is open.
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