USER GUIDE
Control Operation - Service 6
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SAFETY • INSTALLATION & INTEGRATION • OPERATING INSTRUCTIONS • MAINTENANCE •
SERVICE
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. Use Down to select “Self Test”.
2. Press Select .
3. Use Up and Down to scroll through available
information.
To exit the Self Test use Up to select “Return to Menu”
and press Select to confirm.
Differentials
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°.
Note:
Air temperature does not reflect product
temperatures.
The graph below shows a unit’s cooling cycle over time
with various differentials.
Set Points
The Set points menu contains options to modify both the
Zone and Evap set points. Changes to the zone set point
will be reflected on the main screen. Changes to the evap
set point alter the temperature the evaporator needs to
meet during a defrost cycle.
To access Set Points
1. Use Down to select “Set Points”.
2. Press Select .
3. Use Up and Down to scroll through available set
points.
To change set point
4. Press Select , the selected set point will begin to
flash.
5. use Up or Down to modify the value.
Differential
Cycle Start
Cycle End
0
7°C
6°C
1
8°C
6°C
2
8°C
5°C
3
9°C
5°C
4
10°C
4°C
5
10°C
3°C
Up
Select
Down
RETURN TO MENU
DIFFERENTIALS
ZONE = 1°F
Can be displayed in Celsius
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Up
Select
Down
RETURN TO MENU
SET POINTS
ZONE = 3°C
EVAP = 5°C
