Freezers - Energy Saving Operating Mode - Hoshizaki HUR40A(-D) Service Manual

4. Freezers – Energy Saving Operating Mode
a) Sequence of Operation
POWER ON
Board Self Check
1. Frame heater(s) on
2. Evaporator fan(s)
cycles on and off
Cycle On (Cut-on
temperature reached)
[Minimum 2 minutes]
1. Compressor start-up
2. Condenser fan start-up
3. Evaporator fan(s) on
(continuously)
Continue as
normal cycling
Five minutes after
defrost heater off
1. Compressor on
2. Condenser fan on
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.
2-minute Delay
1. Compressor start-up
2. Condenser fan start-up
3. Evaporator fan(s) on
(continuously)
Defrost Start
Preprogrammed time interval
1. Compressor off
2. Evaporator fan(s) off
3. Condenser fan off
4. Defrost heater on
5. "dF" displayed
Five minutes after
compressor start-up
1. Evaporator fan(s) on
19
Cycle Off (Cut-out
temperature reached)
[Minimum 2 minutes]
1. Compressor off
2. Condenser fan off
3. Evaporator fan(s)
cycles on and off
Defrost End
Defrost thermistor
reaches defrost
termination temperature,
or defrost timer reaches
1 hour
Defrost heater off
Eight minutes after evaporator
fan start-up "dF" no longer
displayed, cabinet temperature
displayed