Service Manual

9
1. Startup/Cool Down
3. Cool Down Restart
Cycle Steps
Slight Delay at Startup
Power On
CTh in contro
l
3-min. Comp on timer starts
EvapFM energized Comp energized
ConFM energized
EvapFM energized
Comp de-energized ConFM de-energized EvapFM de-energized
Comp de-energized ConFM de-energized EvapFM energized
Comp energized ConFM energized EvapFM energized
2. Cool Down Achieved
3-min. Comp off timer starts
Factory default 35°F (1.6°C)
CTh warms to 8°F (4°C) above setpoint
5. Defrost Termination
Defrost termination only by maximum time programmed
Legend: Comp-compressor ConFM-condenser fan motor CTh-cabinet thermistor EvapFM-evaporator fan motor
Note: a) EvapFM de-energizes when door is opened on. b) 3-min. minimum Comp on timer starts when Comp energizes. c) 3-min. minimum Comp off timer starts when Comp de-energizes. d) 25-min. maximum defrost time. e) Temperature displayed is frozen during defrost.
4. Defrost
Defrost initiation occurs
every 4-hrs. of cumulative
compressor run time for
25-min
II. Sequence of Operation and Service Diagnosis
A. Sequence Flow Chart
RM-7-HC, RM-10-HC, RM-26-HC, RM-49-HC, RM-65-HC