Hoshizaki F-300BAF User Manual download pdf (Page 28)

5) Reﬁll/Low Water Safety Cycle – As ice is produced, the water level in the reservoir

drops. As it drops, the upper ﬂoat switch and lower ﬂoat switch open. The upper ﬂoat

switch opens ﬁrst. Nothing occurs at this time. When the lower ﬂoat switch opens, the

reﬁll begins. The water control relay de-energizes, the low water safety circuit opens

(terminals 4 and 6 on the water control relay, 3 and 4 on the timer board), a 90 second

countdown timer begins on the timer board, and the inlet water valve energizes. The

compressor, fan motor and gear motor continue to run. The upper ﬂoat switch now

has 90 seconds to close before the low water safety timer terminates and shuts down

the unit. Once the upper ﬂoat switch closes, the water control relay energizes, the

inlet water valve de-energizes and the low water safety 90 second countdown timer

terminates. Diagnosis – Check that the water ﬁll begins. If not, check the lower ﬂoat

switch, voltage to the inlet water valve, the water control relay, water supply, ﬁlters, and

inlet water valve screen.

7) Shutdown – The bin ﬁlls and activates the bin control proximity switch. 90 seconds

later the compressor and fan motor de-energize, then 60 seconds later the gear motor

de-energizes. Diagnosis: Check that the bin control paddle is activated and that

the proximity switch opens. If the compressor and gear motor fail to stop, check the

proximity switch and timer board relays.

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Hoshizaki F-300BAF User Manual Page 28