Service Manual

Column Refrigeration Service Manual
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24
5.1 Modes Of Operation
Models: CR24W or CC24W
Component
Initial
Power-Up
Cooling
Mode (1)
Humidication
Mode (2)
O
Mode (4)
Defrost
Mode (3)
Showroom
Mode
Control
Board
HeartBeat
Flashing 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
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)
Activated with
Door Opening
(3 minute
delay)
Compressor
Delayed 3
Minutes
On O O O O
Condenser
Fan
Delayed 3
Minutes
On O O O O
Evaporator
Fan
Delayed 3
Minutes
On
Activated if
humidity required
O/On On O
1. To avoid short cycling of the compressor there is a programmed 3-minute delay.
2. Upon the evaporator probe sensing 32°Fduringtheocycle,acabinethumidityreadingistaken,if
below desired humidity setpoint, evaporator fans turn on until humidity setpoint is achieved. Then
unitresumesmovestoomode.
3. Duringtheocycleafter12hourshaselapsed,theunitgoesintoadefrostmodethathasthe
evaporator fan motors run for 10 minutes.
4. Duringtheocycle,theevaporatorfansareofor4minutesandthenonfor1minute,throughthe
durationoftheomode.
Table 5.1.3. Modes of Operation (CR24W/CC24W)