Hoshizaki C-100BAF-ADDS Optional Drain Pump HS-0248, Overview, Float Switch Cleaning

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. C-100BAF Series with Optional Drain Pump HS-0248" and "III.B.3.e) Optional Drain Pump HS-0248 Safety Shutdown."

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 de-energize the power supply to the pump.

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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