TD 18440
HIGH HEAD PRESSURE.
1. Is condenser clean.
2. Is fan operating properly?
3. On “water cooled” is water valve adjusted properly?
4. Too high ambient conditions (above 100° F).
COMPRESSOR WILL NOT START.
1. Is there power from the board?
2. Is there power from the power relay?
3. Are start components good?
4. Check LRA.
ICE DROPS, BUT UNIT STAYS IN DEFROST
OR WILL NOT SHUT OFF ON FULL BIN.
1. Is proximity switch too close to magnet or faulty
switch?
2. Is proximity switch plugged into board properly?
3. Board is bad?
COMPRESSOR RUNS WHEN BIN IS FULL
OR WHEN SWITCH IS “OFF” POSITION.
1. Bad power relay (contacts stuck closed).
FAN MOTOR WILL NOT RUN.
1. Is there low head pressure?
2. Is fan motor locked up?
3. Is condenser sensor good?
4. Are connections tight on board?
5. Is control board bad?
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