JOHNSON CONTROLS
110
FORM 160.84-OM1
ISSUE DATE: 9/21/2017
SECTION 3 - OPTIVIEW™ CONTROL CENTER FUNCTIONS AND NAVIGATION
MESSAGE DESCRIPTION
VSD – RECTIFIER
PROGRAM FAULT
The VSD software contains a verication process to ensure that the correct set of software is
installed in the VSD logic board for the application. When this condition clears, the chiller can be
started after the CLEAR FAULTS key is pressed.
VSD SHUTDOWN –
REQUESTING FAULT
DATA
The VSD has shut down the chiller and the control center has not yet received the cause of the
fault from the VSD, via the serial communications link. The VSD shuts down the chiller by open-
ing the Motor Controller “VSD Stop Contacts” (located on the VSD Logic Board and connected
between TB6-16 and TB6-53 in the control center). The Microboard in the control center then
sends a request for the cause of the fault to the VSD Logic Board over the serial link. Since se-
rial communications are initiated every 2 seconds, this message is typically displayed for a few
seconds and then replaced with one of the other VSD fault messages.
TABLE 12 - SAFETY SHUTDOWN MESSAGES (CONT'D)
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