Hoshizaki TM-500AAE, Service Manual

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2) Gear Motor
Thermal Protector
Provided on the motor coil. Operates when the motor temperature rises. The protector is
auto-reset, but the controller shuts down the icemaker. Press the Reset Button to restart.
Photomicrosensor
Counts the number of drum rotation and in case of abnormality, shuts down the icemaker
including the Gear Motor.
The above protectors indicate “EE” in the Display Window.
3) Fan Motor
The auto-reset Fuse attached to the motor coil will operate when the motor temperature
rises. For the air-cooled models, the High Pressure Switch will turn on and off the
icemaker. “E4” may appear in the Display Window.
4) Heater
When the Heater overheats, the Thermal Fuse connected in parallel will operate at 75°C.
Auto-reset.
5) Overcurrent Protector
Trips to shut down the icemaker in case of overcurrent conditions. Manual-reset.
6) Spout Switch
If the Bin Control Switch fails to operate, the Spout will be clogged with ice. A proximity
switch is installed to prevent this trouble. When the Spout Switch trips, the icemaker will
shut down. If the Spout Switch resets but trips again within 5 minutes, and if this error
occurs four times in total (fixed mounting only), “EL” will blink in the Display Window.
7) Low Water
In case of low water or clogged water supply circuit, the icemaker will shut down unless the
Float Switch trips at the upper float level within 20 minutes with the Water Valve left open.
If the error occurs once (floor mounting) or repeats three times in total (fixed mounting),
“C1” will appear in the Display Window.
8) Ice Production Timer
Detects ice production error if the Float Switch keeps tripping at the upper float level for 10