[E] Heater (Cutter); [F] Heater (Tank); [G] Gear Motor; Water Circuit - Hoshizaki TM-500AAE Service Manual

[e] HEATER (CUTTER)

The Heater provided on the backside of the Cutter prevents ice jamming on the Cutter resulting
in a clogged Spout and ice forming on the back of the Cutter at a low temperature. The thermal
sensor attached on the water inlet controls to energize the Heater.

[f] HEATER (TANK)

The Heater provided inside the Tank prevents the Float Switch from freezing. As with the Heater
for the Cutter, the thermal sensor attached on the water inlet controls to energize the Heater.

[g] GEAR MOTOR

The Gear Motor consists of a 1 phase 230V drive motor integrated with a decelerator and
provided with a built-in auto-reset Thermal Protector. When the Thermal Protector trips, the
Controller Board will stop the Gear Motor. The Protector can be reset by the Reset Button on
the Operation Board. The Thermal Protector trips when the Gear Motor mechanism is overloaded
or when excessively high or low voltage is applied on the Gear Motor. The electrical capacity
must be increased if a large current flows through the surrounding equipment.

4. WATER CIRCUIT

[a] FLOAT SWITCH

The Tank holding the Evaporator is provided with a plastic Float Switch to detect the water level.
The floats move up and down along with the water level and send ON/OFF signals to open/close
the Water Valve in order to maintain the proper water level.
If the proper water level cannot be resumed within about 20 minutes after the Float Switch sends
an OFF signal, the icemaker will detect a low water condition and shut down. The icemaker will
automatically restart icemaking operation when the proper water level is resumed within 80
minutes.
If the Float Switch trips at the upper float level for 10 minutes after the Tank fills up, the icemaker
will display "E1" for no ice production error and shut down.
If the Float Switch trips at both upper (fill) and lower (empty) float levels, the icemaker will display
"E2" for a switch contact error and shut down.
See "9. ERROR CODES" for details.

[b] CONTROL WATER VALVE

The Control Water Valve located above the Tank will open to supply water to the Tank when the
coil is energized. Despite the water pressure varying from 0.3 bar to 8 bar at the water supply
inlet, the built-in flow controller maintains almost the same water flow (100V AC).
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