User Guide & Service Manual

USER GUIDE
Control Operation - Service 5
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SAFETY • INSTALLATION & INTEGRATION • OPERATING INSTRUCTIONS • MAINTENANCE • SERVICE
Offsets are used to adjust or correct thermistor readings.
Offset values are added to the current thermistor reading
and are then used by the control board to determine
cooling and defrost cycle times. Offsets have a range of
+/- 10°F. Corrected values may be viewed through the
customer “All Temps” menu.
To access Offsets
1. Press to select “Offsets”.
2. Press .
3. Press and to scroll through available
thermistors.
To change offsets
4. Press , the selected thermistor will begin to flash.
5. Press or to modify offset value.
6. Press to confirm setting.
To exit the Offset menu, press to select “Return to
Menu” and press to confirm.
Self Test
Self test is used to initiate a self diagnostic report. Any
system faults will be displayed under Self test. If no errors
are present “no errors” will be displayed and the main
control board is functioning properly. The main control
board is extremely robust and should rarely require
service. Most issues are external to the control. Reference
troubleshooting for more information.
To access Self Test
1. Press to select “Self Test”.
2. Press .
3. Press and to scroll through available
information.
To exit the Self Test, Press to select “Return to Menu”
and press to confirm.
Differentials
(DO NOT MAKE AN ADJUSTMENT TO THIS WITHOUT
CONTACTING TECH LINE: 800-779-2955)
Differentials are used to determine the maximum variation
from set point and have a range of 0 through 10. The
table below shows the effect of differentials on cooling
cycles with a set point of 45°F (7°C).
NOTE: Air temperature does not reflect product
temperatures.
The graph below shows a unit’s cooling cycle over time
with various differentials.
Up
Select
Down
RETURN TO MENU
SELF TEST
NO ERRORS
try “RELAY TOGGLE”
Differential Cycle Start °F (°C) Cycle End °F (°C)
0 45° (7°) 43° (6°)
1 46° (8°) 43° (6°)
2 47° (8°) 41° (5°)
3 48° (9°) 41° (5°)
4 49° (10°) 39° (4°)
5 50° (10°) 37° (3°)
Up
Select
Down
RETURN TO MENU
DIFFERENTIALS
ZONE = 1°F
Can be displayed in Celsius
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