Temperature Adjustment And Switch Functions; Controller Alarms And Signals - Minus Forty 09-USGF Owner's Manual

ILLUSTRATION: 09/09M/09X-USGF, 10/10M/10X-USGF
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TEMPERATURE ADJUSTMENT AND SWITCH FUNCTIONS

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.
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)
There are two switches located on the right hand side of the controller.
Their functions are to manually switch electronic components of the freezer.
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.
ELECTRONIC CONTROLLER
ELECTRONIC CONTROL

CONTROLLER ALARMS AND SIGNALS

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
Message
Prl diSC Cabinet temperature probe open
Prl Short CC
Cabinet temperature probe short-circuited
Pr2 diSC Defrost probe open
Pr2 Short CC Defrost probe short-circuited
Int Error Internal memory error
POWER LIGHT
Cause Action
• Check connections
• Replace probe
• Check connection
• Replace probe
• Replace controller
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