Hoshizaki FM-300AFE-HC, Service Manual

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9) Float Switch
The Float Switch or connector may have a bad contact if the Float Switch trips at the upper
float level but not at the lower float level with the Flush Water Valve closed. “E2” will appear
in the Display Window.
10) High Pressure Switch
Operates at a high condensing pressure when the icemaker has a clogged Air Filter or a
dirty Condenser. “E4” will appear in the Display Window when the Pressure Switch trips five
times within an hour.
11) Voltage
If the supply voltage is too low, the Compressor may fail to start properly, or the Gear Motor
may lock to cause freeze-up inside the Evaporator. To prevent these troubles, the icemaker
will shut down and wait until the proper voltage is restored. “EF” will appear in the Display
Window.