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8-2
TROUBLESHOOTING
SYMPTOM: Machine won't run.
POSSIBLE CAUSE
Power failure ++ Intermittent power
interruption
One of the 3amp circuit breaker (CB) in the
control panel tripped.
High/Low safety pressure switch tripped.
2/14/07
POSSIBLE REMEDY
Check electrical fused disconnect or circuit
breaker supplying power to the machine. If
power has been off, make sure the
compressor crankcase heater is energized, the
crankcase is warm, and there is no liquid
refrigerant in the crankcase prior to running
the machine.
Push the "Start" button to
initiate startup in a thawing cycle.
Check compressor crankcase heater, coils of
relays, contactors, starters, solenoid valves,
and thawing timer for a ground. Repair or
replace any defective part, and replace fuse.
Make sure there is no liquid refrigerant in the
compressor crankcase prior to re-starting the
machine.
If the machine stops by low-pressure cutout,
the switch will reset automatically when the
pressure rises to the " cut in " setting. If it
stops by high-pressure cutout, the switch will
have to be manually reset after the pressure
drops below the " cut-in " setting.
switch settings and push the "Start" push
button to start the machine in a thawing cycle.
Check the head pressure during the next freeze
cycle.
See FIGURE 9-4, Section 9,
(High/Low Pressure Switch).
03TA Service Manual
Check
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