Справочник Пользователя для Hoshizaki 73183
20
E. Compressor Overload, Short Cycle Protection, and High-Pressure Switch
1. Compressor External or Internal Overload
If combined temperature/amperage value is above the limit specified 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.
• If the condenser fan motor is operating and the compressor is off, it is most likely that
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.
• If the condenser fan motor is operating and the compressor is off, it is most likely that
the compressor overload opened. If both the compressor and condenser fan motor are
off, it is most likely the unit is off or the high-pressure switch has opened. For further
details, see "IV. Service Diagnosis."
off, it is most likely the unit is off or the high-pressure switch has opened. For further
details, see "IV. Service Diagnosis."
• On refrigerators, the compressor overload is integrated with the start relay. On 1-section
freezers, the compressor overload is internal. On 2-section freezers, the compressor
overload is external.
overload is external.
2. Short-Cycle Protection
There is a 2-minute minimum off-time and on-time for the compressor.
Note: Time may vary with compressor overload or high-pressure switch activation.
3. High-Pressure Switch
If pressure on the high-side of the unit exceeds Hoshizaki specifications, the
high-pressure switch activates and interrupts the compressor circuit, de-energizing the
compressor until the pressure returns to an acceptable level.
high-pressure switch activates and interrupts the compressor circuit, de-energizing the
compressor until the pressure returns to an acceptable level.
F. Mullion/Perimeter Heater
Refrigerators and freezers with mullions are equipped with mullion heaters. Freezers are
also equipped with perimeter heaters. The heaters are energized as soon as the power
switch is turned on.
also equipped with perimeter heaters. The heaters are energized as soon as the power
switch is turned on.
G. Thermistors
The cabinet thermistor is used for cabinet temperature control and the defrost thermistor
is used for defrost cycle initiation and termination. Thermistor resistance varies
depending on temperature. The control module monitors the resistance to control system
operation. No adjustment is required. For further details, see "IV.C. Thermistor Check."
is used for defrost cycle initiation and termination. Thermistor resistance varies
depending on temperature. The control module monitors the resistance to control system
operation. No adjustment is required. For further details, see "IV.C. Thermistor Check."