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5. Start-up Delay
The start circuit of the compressor is timed such that at power-up and during any
compressor off-time, there will be at least a 2 minute delay before the compressor will
start.
6. Compressor Short Cycle Timer
There is a 2 minute minimum off-time and on-time for the compressor.
Note:
• Any time the compressor is started, it will keep running for a minimum of 2 minutes.
• Any time the compressor is turned off, it will stay off for a minimum of 2 minutes.
• Time may vary with pressure switch activation.
7. Safety Devices
a) Pressure Switch
When pressure on the high-side of the unit is detected to be above a preset limit
(determined by Hoshizaki specifications), a pressure switch will activate causing power
to be interrupted to the compressor relay. This power interruption will shut down the
compressor for a minimum of 5 minutes. After 5 minutes, if pressure is no longer above
the preset limit, the pressure switch will reset automatically. When the pressure switch
resets, power will be resupplied to the compressor.
b) Compressor Protector
When a combined temperature/amperage value is above the limit specified by the
compressor manufacturer, a protector will operate independently, turning off the
compressor. The compressor will restart when this protector has reset.
Note:
• The compressor protector resets automatically.
• If the condenser fan is operating and the compressor is off, it is most likely that the
protector has operated.
c) Defrost Protection
Primary defrost termination is controlled by the defrost thermistor. However, two
additional safeties are also present.
1. Time Termination - 1 hour maximum
2. Temperature Termination - Measured by a separate device that is in-line with the
heaters and independent of the control board.
8. Energy Saving Mode
On some units, the evaporator fan and/or other components may operate intermittently as
a means to reduce energy consumption. This setting is made at the factory and such
operation is automatic.