Hoshizaki TempGuard FH1-SSB, Service Manual, Page: 11 / 63

11
POWER ON
Board Self Check
Display reads "r_##"
(## is board revision)
1. Frame heaters on
. Evaporator fan on
2.5 minute delay
1. Compressor start-up
. Condenser fan start-up
Cycle Off
(Cut-out
temperature reached)
[Minimum .5 minutes]
1. Compressor off
. Condenser fan off
Cycle On (Cut-on
temperature reached)
[Minimum .5 minutes]
1. Compressor on
. Condenser fan on
If evaporator temperature
reaches 13°F (8°F for Pass Thru),
unit initiates defrost.
1. Compressor off
(Note: Condenser fan and
evaporator fan are on.)
Evaporator temperature
reaches 40°F, defrost
terminated
1. Compressor on
. Condenser fan on
Normal cycling continues
Note: 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 1/ minute delay before the
compressor will start. The only exception is when the overload activates and
deactivates. The compressor has a 1/ minute minimum run time during every
run cycle.
II. General Information
A. Sequence of Operation and Timing Charts
1. Refrigerator and Refrigerator Side of Dual Temp Models
a) Sequence of Operation