Specifications; Features; [A] Low Voltage; [B] Overload Protection - Hoshizaki FM-481AGE-HC Service Manual

I. SPECIFICATIONS

1. FEATURES

[a] LOW VOLTAGE

When the supply voltage is too low or surrounding high-current equipment starts up, the
voltage in the icemaker may drop temporarily. In this case, the Compressor will fail to start,
or the Gear Motor will lock during the icemaking operation. The locked Gear Motor may
apply the maximum torque to the icemaking mechanism and damage its parts. To avoid
this trouble, the icemaker will be shut down when the voltage drops. The icemaker will
restart automatically when the proper voltage is restored.

[b] OVERLOAD PROTECTION

The auger type icemaker employs the Gear Motor generating a large torque to scrape ice
forming inside the Evaporator. To produce nugget ice, the Extruding Head also requires a
large torque to compress ice. Some use conditions may overload the icemaking
mechanism. The icemaker will detect overload by reduction in Gear Motor rotation speed
and partly bypass the refrigerant flow in the refrigeration circuit. This will temporarily reduce
the ice production to avoid the overload condition.

[c] OVERLOAD ERROR

When the above protection fails to evade the overload condition and the Gear Motor has a
high current and a low rotation speed, the icemaker will shut down for protection. The
icemaking mechanism will have extensive damage, if this condition is repeated ten times. In
this case, the icemaker will display an error code to notify the user of the excessive load on
the icemaking mechanism and the need of its replacement.
[d] USER RESET
When a protector trips to shut down the icemaker, an error code will be displayed. If it is a
resettable error, the user can restart the icemaker by pressing the Reset Button accessible
from the Window Panel and continue the icemaking operation until a service person
arrives. Some errors are non-resettable or repetitive and require troubleshooting by
qualified personnel.

[e] ERROR CODES AND RECORDS

When the icemaker shuts down with an error, the Display Window will show an error code
"E_". A maximum of eight most recent records are memorized and can be checked at the
time of service or inspection.
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