Johnson Controls Frick QUANTUM Series Maintenance Manual page 58

Condenser/vessel control panel
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090.560-M (APRIL 13)
Page 58
DESCRIPTION: The About screen shows the Analog and
Digital boards that have been detected. If a board has lost
communications, a shutdown will be issued. All outputs are
turned off on a Digital Board that has lost communications. All
inputs will get set to their minimum value range on an Analog
Board that has lost communications. A loss of communications
QUANTUM™ LX CONDENSER/VESSEL CONTROL PANEL
MAINTENANCE
MISCELLANEOUS MAINTENANCE SCREENS
About
to an analog board should result in sensor fault shutdown
message that is associated with the sensors on that board. If
the RX LED on the I/O board is blinking but the board was not
detected on the About screen, or an I/O Comm failure occurs,
check the address of the board.

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