Hoshizaki FM-300AFE-HC, Руководство по обслуживанию

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[d] OPERATION BOARD
The Operation Board is provided for operation of the icemaker. See “7. OPERATION
BOARD” for details.
[e] CONTROLLER BOARD
The icemaker is controlled by the Controller Board based on the following logic:
1) Low Voltage Standby
In a low voltage condition, the Compressor and Gear Motor may fail to start or rotate
properly due to insufficient torque. This could result in a twisted Evaporator. The icemaker
will stop icemaking operation until the proper voltage is restored.
2) Ice Production Control
In a low ambient or water temperature condition, the ice production capacity will increase.
Then, the Gear Motor will have a larger torque to scrape off ice, which will overload the
entire icemaking mechanism.
3) Error Code Indication
When the icemaker shuts down with a trouble, an error code will be displayed immediately
to notify the user. To facilitate servicing, ask the user for the applicable error code, and
prepare for the trouble in advance.
4) Flush Timer
The previous models were equipped with a Flush Timer that periodically flushes the water
circuit to prevent water deposits from entering the Bearing and accelerating its wear. The
latest models have the Controller Board provided with this function of the Flush Timer.
During the flush cycle, the Display Window on the Operation Board will illuminate “DRAIN”.
As the auger type icemaker continuously produces ice, the content of substances included
in the icemaking water inside the Evaporator Casing is three to five times as high as that in
the supplied water. As a result, substances such as calcium, magnesium, and silica
contained in water will attach and deposit inside the Evaporator Casing to reduce the ice
production capacity or accelerate wear on the moving parts.