Electric Circuit; [A] Basic Operation; [B] Timing Chart - Hoshizaki FM-251AFE Service Manual

valve position to regulate the superheat (difference between evaporating temperature and
suction gas temperature). No superheat control is available from outside.
To check the Expansion Valve for proper operation, remove the Bulb while the Compressor
is running. If the suction pressure rises, the Expansion Valve is working normally.
Note: Do not leave the Bulb removed for a long time while the Compressor is running.
The Compressor may fail due to liquid return.

6. ELECTRIC CIRCUIT

CAUTION
Reassemble all the components as they were after servicing the unit according to a
service call.

[a] BASIC OPERATION

The icemaker starts water supply when the Operation Switch is turned ON. On completion
of water supply, the Gear Motor starts immediately. After 5 minutes the Compressor starts
to begin icemaking operation.
In normal operation, the icemaker shuts down when the Storage Bin fills up to trip the Bin
Control Switch or the Stop Button is pressed. When the Compressor operates for 6 hours in
total and continuously for more than 10 minutes, the icemaker supplies water until the
Reservoir fills up and starts a drain cycle. After 10 minutes the icemaker automatically starts
water supply and resumes icemaking operation.

[b] TIMING CHART

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