Service Manual

11
II. Sequence of Operation and Service Diagnosis
The steps in the sequence are as outlined below.
See the table for default cabinet temperature control settings.
Model Default Cabinet Temperature
Control Setting
Approximate Default Temperature
Undercounter
Worktop
Between 4 and 5 Refrigerator: 34°F (1°C)
Freezer: -5°F (-21°C)
Prep Table 6 34°F (1°C)
A. Sequence of Operation Flow Chart
1. Refrigerator: Undercounter and Worktop
a) CRMR27(-01)(-W)(-W01), CRMR48(-01)(-W)(-W01)
Refrigerator: CRMR27(-01)(-W)(-W01), CRMR48(-01)(-W)(-W01) Sequence Flow Chart
1. Startup/Cool Down
2. Cool Down Achieved
CTh closed
Comp energized
ConFM energized
EvapFM energized
CTh open
EvapFM de-energized
Comp de-energized
ConFM de-energized
Legend: Comp–compressor; ConFM–condenser fan motor; CTh–cabinet thermostat;
EvapFM–evaporator fan motor
CTh in control
CTh above setpoint CTh cools to setpoint
CTh above setpoint
b) CRMR60(-W), CRMR72(-W)
Legend: Comp–compressor; ConFM–condenser fan motor; CTh–cabinet thermostat;
EvapFM–evaporator fan motor
Refrigerator: CRMR60(-W), CRMR72(-W) Sequence Flow Chart
2. Cool Down
3. Cool Down Achieved
CTh closed
Comp energized
ConFM energized
EvapFM energized
CTh open
EvapFM energized
Comp de-energized
ConFM de-energized
CTh above setpoint
CTh cools to setpoint
CTh above setpoint
CTh in control
1. Startup
EvapFM energized
Off cycle defrost
between run cycles.
Off cycle defrost
between run cycles.