Minusforty 20X-UDGF, Owner'S Manual

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The electronic controller can detect and signal several alarm conditions: high/low freezer temperatures,
door open and open or short-circuited temperature probes. If the alarm conditions last longer than pre-
programmed time delays, the controller will turn ON an audio signal (buzzer). Also a LED light located
in the upper left corner of the controller, next to the caution symbol, will glow in case an alarm is active.
Once the alarm conditions have been fixed, the controller will turn off the alarms on its own. Alarms can
be disabled by pressing any controller button, during alarm conditions
CONTROLLER ALARMS AND SIGNALS
Message Cause Action
Prl diSC
Cabinet temperature probe open
• Check connections
• Replace probe
Prl Short CC
Cabinet temperature probe short-circuited
Pr2 diSC
Defrost probe open
• Check connection
• Replace probe
Pr2 Short CC
Defrost probe short-circuited
Int Error
Internal memory error • Replace controller
Locate the electronic control on the right of the front bottom grill. The electronic control displays ac-
tual temperature inside the freezer. In addition, the electronic control turns the refrigeration system OFF
when freezer reaches the set temperature, and turns the refrigeration system ON after the freezer
temperature rises by 8°F or after 7 minutes, whichever lasts longer.
TEMPERATURE ADJUSTMENT AND SWITCH FUNCTIONS
ELECTRONIC CONTROLLER
LIGHT POWER ELECTRONIC CONTROL
To adjust the set temperature, follow these steps:
1. Press and release P button; the set temperature and SP1 are displayed alternatively on the controller
2. Press the UP or DOWN buttons to adjust the set temperature.
3. Press P to store the adjusted value; The electronic control will return to cabinet temperature
display. The U Button on the electronic controller is used for displaying cabinet and defrost
temperatures (PR1 and PR2 parameters)
1. POWER switch turns the refrigeration system (including all electrical parts) ON or OFF.
(use a pen or pencil to press the power switch to the ON or OFF position).
2. LIGHT switch turns the internal and external lights ON or OFF.
There are two switches located on the right hand side of the controller.
Their functions are to manually switch electronic components of the freezer.
Remove the plastic screw
covers from the right hand
side of the display.
With a screwdriver remove
the two screws from the right
hand side of the display.
Slide the right hand display end
cap from the display frame.
ISD TRANS-LIGHT LED STRIP REPLACEMENT (IF EQUIPPED)
Disconnect LED strip wires
from connectors and peel LED
strips off freezer.
Install replacement LED strips
at the same place and connect
wires. Observe color coding.
WARNING
Make sure the freezer is disconnected from the power supply before any service. Press the
freezer switch to the “Off” position then unplug the power cord from electrical receptacle.
All service work must be conducted by a certified technician only.
Slide the diffuser panel and
graphic panel (if used) out of
the frame channel.
Replace the diffuser panel and
graphic panel (if used).
Replace the display end cap.
Replace the two screws on
the display end cap.