Service Manual

12
2. SR: Refrigerator
SR - Refrigerator Sequence Flow Chart
2. Cool Down Achieved
3. Cool Down Restarts
EvapFM energized Comp de-energized ConFM de-energized
4. Defrost
CTh above setpoint
CTh cools to setpoint
CTh above
setpoint
Defrost Termination: 46°F (7.7°C) achieved or 45 min. backup defrost timer terminated.
CTh in control
1. Startup/Cool Down
Comp energized ConFM energized EvapFM energized 5-hr. DT starts
5-hr. DT terminates 5-min. minimum DT starts 45-min. maximum DT starts DH energized Comp de-energized ConFM de-energized EvapFM de-energized
Power on Yellow LED On (10-sec. Delay)
Legend: Comp-compressor ConFM-condenser fan motor CTh-cabinet thermistor DH-defrost heater DT-defrost timer DTh-defrost thermistor EvapFM-evaporator fan motor
Note:
a) 2-min. minimum Comp on timer starts when Comp energizes b) 2-min. minimum Comp off timer starts when Comp de-energizes c) 5-hr. cumulative compressor run-time defrost timer d) 5-min. minimum defrost time e) 45-min. maximum defrost time
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Evap. Temp. achieves 46°F (7.7°C) or 45 min. DT terminates DH de-energized Comp energized ConFM energized EvapFM energized
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DTh in control
5. Defrost Termination
5-min. minimum and
45-min. maximum
DT starts
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Red, Yellow, and Green LEDs Cycle
Red and Green LEDs on Yellow LED off
Green LED on Red and Yellow LEDs off
Defrost: Time achieved. 5-hr. DT terminates
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