Hoshizaki 73168 Refrigerator User Manual


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14
2. Cabinet and Rail Cooling (continued)
4. Cabinet Defrost
DTh in control
•6‑hourDTexpires,thenresets
•100‑minutedefrostterminationtimerstarts
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Power Switch "ON," Rail Cooling Switch "NORMAL" or "LOW" Position (continued)
DTh reaches 49°F (9.4°C) or
100-minute defrost termination timer expires or
DTst temperature reaches 120°F± 5°F (49°C±3°C)
5. Cabinet Cool Down Defrost Recovery
(defrost terminated)
Stage 1:
When Comp is off: 5-minute Comp delay timer starts
When Comp is on: 5-minute recovery delay timer starts, Comp continues (rail on)
Stage 2: 5-minute CabFM and
PH delay timer starts
Comp energized
ConFM energized
DH energized
RailFM energized
RLLV energized
CabFM de-energized
CLLV de-energized
PH de-energized
C on
R on
C on
R off
C off
R on
Comp energized
ConFM energized
DH energized
RailFM energized
RLLV energized
CabFM de-energized
CLLV de-energized
PH de-energized
DH energized
RailFM energized
RLLV energized
CabFM de-energized
CLLV de-energized
Comp de-energized
ConFM de-energized
PH de-energized
C off
R off
DH energized
RailFM energized
RLLV energized
CabFM de-energized
CLLV de-energized
Comp de-energized
ConFM de-energized
PH de-energized
To 5 below
Comp energized
ConFM energized
RailFM energized
RLLV energized
CabFM de-energized
CLLV de-energized
DH de-energized
PH de-energized
C on
R on
C on
R off
CLLV energized
RailFM energized
CabFM de-energized
Comp de-energized
ConFM de-energized
DH de-energized
PH de-energized
RLLV de-energized
Legend:
C-cabinet cooling
CabFM-cabinet fan motor
Comp-compressor
ConFM-condenser fan motor
CLLV-cabinet liquid line valve
CTh-cabinet thermistor
DH-defrost heater
DT-defrost timer
DTh-defrost thermistor
DTst-defrost thermostat
PH-perimeter heater
R-rail cooling
RailFM-rail fan motor
RLLV-rail liquid line valve
CabFM and PH
energize for 10 sec.
CLLV energized
Comp energized
ConFM energized
RailFM energized
RLLV energized
C on
R on
C on
R off
CabFM and PH
energize for 10 sec.
CLLV energized
RailFM energized
Comp energized
ConFM energized
RLLV de-energized
CabFM energized
PH energized
•Con‑CThatorabovesetpoint
•Coff‑CThhasreached3.6°F(2°C)ormorebelowsetpoint
•Ron‑RThatorabovesetpoint
•Roff‑RThhasreached3.6°F(2°C)ormorebelowsetpoint
Wheninthe"NORMAL"position,RailFMoperatescontinuously.
Wheninthe"LOW"position,RailFMoperatescontinuouslywhenrailiscoolingdownandintermittently
(perF9setting)whenrailcooldownisachieved.See"II.D.4.a)SwitchSettings"and"II.D.5.ServiceMenu."
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