Service Guide

Column Refrigeration Service Manual
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22
5.0 Component Operation
5.1 Modes Of Operation
Model: CR24R And CR30R
Component
Initial
Power-Up
Cooling
Mode (1)
Humidication
Mode (2)
O
Mode
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 O
Tip-Out
Produce Bin
Damper
Opening
Open until
satisedby
temperature
Open if humidity
required
Closed Closed Closed
Meat/Fish
Drawer
Damper
Opening
Open until
satisedby
temperature
Closed Closed Closed Closed
Deli Drawer
Damper
Opening
Open until
satisedby
temperature
Closed Closed Closed Closed
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humidityreadingistakeninthetip-
out bin, if below desired humidity setpoint, tip-out bin damper opens and evaporator fans turn on.
3. Duringtheocycleaftereight(8)hourshaveelapsed,theunitgoesintoadefrostmodethathasthe
evaporator fan motors run for 10 minutes.
Table 5.1.1. Modes of Operation (CR24R)