Service Manual

32
E. Safety Devices and Light Control
1. Compressor External or Internal Protector
If combined temperature/amperage value is above the limit specied by the
compressor manufacturer, the compressor overload operates independently to turn
off the compressor. The compressor overload de-energizes the compressor until the
temperature/amperage value returns to an acceptable level.
2. Short-Cycle Protection
There is a 2-min. minimum off-time and on-time for the compressor.
Note: Time may vary with compressor protector or high-pressure switch activation.
3. High-Pressure Switch
If pressure on the high-side of the appliance exceeds Hoshizaki specications, the
high-pressure switch activates and interrupts the compressor circuit, de-energizing the
compressor until the pressure returns to an acceptable level.
If the condenser fan motor is operating and the compressor is off, it is most likely that the
compressor protector opened. If both the compressor and condenser fan motor are off, it
is most likely the appliance is off or the high-pressure switch has opened.
4. Light Control for Glass Door Models
Glass door models feature lights that are controlled by the standby/light control button
located on the control module. Press and release the standby/light button to turn the light
on or off.
F. Mullion/Perimeter Heater
Refrigerators are equipped with mullion heaters and the freezers are equipped with
mullion and perimeter heaters. The heaters are energized (except PT2A and R_2A
models) when the appliance is plugged into the electrical outlet. Mullion heater
energizes with compressor and condensor fan motor on PT2A and R_2A models.