Hoshizaki HUR40A(-D) B. Sequence of Operation and Timing Charts, a Sequence of Operation

B. Sequence of Operation and Timing Charts

For details on operating modes, see "II.D.4. Operating Modes."

1. Refrigerators – Continuous Operating Mode

a) Sequence of Operation

POWER ON

Board Self Check

1.Frame heater(s) on

2.Evaporator fan(s) on

2-minute Delay

1.Compressor start-up

2.Condenser fan start-up

Cycle Off (Cut-out temperature reached) [Minimum 2 minutes]

1.Compressor off

2.Condenser fan off

Cycle On (Cut-on temperature reached) [Minimum 2 minutes]

1.Compressor start-up

2.Condenser fan start-up

Continue as normal cycling

Defrost Start Preprogrammed time interval

1.Compressor off

2.Evaporator fan(s) off

3.Frame heater(s) off (Q6 and later)

4.Condenser fan off

5. Defrost heater on 6. "dF" displayed

Defrost End Defrost thermistor reaches defrost termination temperature,

or defrost timer reaches 1 hour

Defrost heater off

Five minutes after defrost heater off

1.Compressor on

2.Condenser fan on

Five minutes after compressor start-up

1.Evaporator fan(s) on

2.Frame heater(s) on (Q6 and later)

One minute after evaporator fan start-up "dF" no longer displayed, cabinet temperature displayed

Note:

1)Cut-on, cut-off, and cabinet temperature are read by the same sensor, called the "cabinet thermistor."

2)The defrost thermistor reads the evaporator temperature.

3)There is a five second evaporator fan startup delay when the compressor and fan would otherwise start together.

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