50 • iPro Case Controller I&O Manual FM V1.01 026-1738 Rev 1
14.5. System Overrides
The iPro Case Controller has a menu where system relay output
and electronic valve overrides can be entered. The relay output
overrides and the valve overrides are active for 30 minutes before
the system enters automatic regulation again.
Press and hold T4 key for 3 seconds from the main status screen
to enter the Main Menu, then press T4 for the Command screen:
For each system load there is a corresponding override enable and
override value. Use the T3/T5 keys to make a selection and the T4
key to edit. Press T4 again to save.
Example of overriding the defrost relay to ON: Highlight
DefrOver and press T4 to edit, press T3/T5 to set = enable. Use
T3/T5 to highlight DefrOn and press T4 to edit, change from OFF
to ON and press T4 to save. The relay point the defrost is assigned
to is now active/ON. To remove the override, edit the DefrOver
back to disable.
From the relay overrides page, press the T7 key to arrow over to
the valves override page shown below:
To override a valve, use the T3/T5 keys to highlight the desired
valve. Press T4 to edit and then T3/T5 keys to change the value,
press T4 to save the override value. The override will be active for
30 minutes unless manually removed. To cancel the override, edit
the value to -1 and save.
14.6. Test Mode
The case controller has an integrated Test mode in the Visograph
display. The purpose of the Test mode is to verify that sensors,
inputs, relay outputs, and valve driver outputs are operational on
the case/fixture prior to shipping. The Visograph display will
guide the user through a series of tests in order to verify the
operation of all the connected I/O and valves. The Test mode is
intended to be used as a factory end of line verification, and
caution should be used when re-entering test mode once the
device is deployed in the field because entering Test mode
disables normal system regulation.
1. To enter Test mode, navigate to the Main Menu by pressing
and holding the T4 button on the Main status screen for three
(3) seconds:
2. Then press T4 for the Command screen:
Figure 14-17 - Command Screen
Figure 14-18 - Valves Override Screen
CAUTION: Use caution when entering Test
mode in a live system. During Test mode
normal system regulation is disabled and
valves and loads will be put in Override during the test
sequence. Take care not to cause unwanted system
problems or liquid refrigerant flood-back due to
overriding system valves during the test.
Figure 14-19 - Main Menu
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