D. Optional Drain Pump HS-0248
1. Overview
As ice melts, water drains from the storage bin into the drain pump reservoir. When the drain pump's lower float switch closes, the pump motor energizes and pumps out the water. If water cannot be pumped out of the drain pump reservoir due to a blocked discharge hose, bad check valve, or bad pump motor, the upper float switch closes as the water level in the pump rises. When the upper float switch closes, this activates the safety. The safety interrupts power to the icemaker until the upper float switch opens. Power is supplied to the pump motor as long as the lower float switch is closed.
For schematics, see "III.B.2.
2. Float Switch Cleaning
Depending on local water conditions, scale may build up on the float switch. Scale on the switch can cause the float to stick. In this case, the float switch should be cleaned and checked.
1)Move the power switch to the "OFF" position, then unplug the unit from the electrical outlet. WARNING! Moving the power switch to the "OFF" position does not de‑energize the power supply to the pump. The icemaker must be unplugged to
2)Disconnect the vent hose from the upper rear panel. See Fig. 4.
3)Remove the upper rear panel, then the lower rear panel.
4)Remove the reservoir cover from the drain pump assembly. See Fig. 5.
5)Leave the float switch assembly connected to the float switch cover and leave the float on the shaft. Wipe down the float switch assembly with a mixture of 1 part recommended cleaner Hoshizaki "Scale Away" and 25 parts warm water.
6)Rinse the float switch assembly, then replace the reservoir cover in its original position.
Upper Rear Panel
Vent Hose
Discharge Hose
Lower Rear Panel
Fig. 4
Reservoir Cover
Float Switch Assembly
Fig. 5
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