Column Refrigeration Service Manual
23
5.1 Modes Of Operation
1. To avoid short cycling of the compressor there is a programmed 4-minute delay. Therefore, the
compressor must be off for 4 minutes before it will start the next cooling cycle.
2. Every eight (8) hours, the unit goes into a defrost mode that is timed (15 minutes) or evaporator coil
temperature (42°F) terminated. Upon termination of the defrost, the unit is idol for a 2 minute drip
(off) mode. Dependent upon cabinet temperature, the unit either goes into cooling mode or resumes
in off mode.
Model: CR24F
Component
Initial
Power-Up
Cooling
Mode (1)
Off
Mode
Defrost
Mode (2)
Showroom
Mode
Control
Board
HeartBeat
Flashing
Flashing
Flashing
Flashing
Flashing
Lights
Activated with
Door Openings
Activated with
Door Openings
Activated with
Door Openings
Activated
with Door
Openings
Activated with
Door Openings
Door Alarm
Activated with
Door Opening
(3 minute
delay)
Activated with
Door Opening
(3 minute
delay)
Activated with
Door Opening
(3 minute delay)
Activated
with Door
Opening
(3 minute
delay)
Activated with
Door Opening
(3 minute
delay)
Compressor
Delayed 4
Minutes
On
Off
On
Off
Condenser
Fan
Delayed 4
Minutes
On
Off
Off
Off
Evaporator
Fan
Delayed 4
Minutes
On
Off
Off
Off
Defrost
Solenoid
Off
Off
Off
On
Off
Table 5.1.2. Modes of Operation (CR24F)