York OPTIVIEW - Run, Startup, and Inhibit Messages; Run Messages; MBC Startup Messages; Start Inhibit Messages

JOHNSON CONTROLS
115
SECTION 2 - OPTIVIEW CONTROL CENTER INTRODUCTION
FORM 160.78-O2
ISSUE DATE: 5/22/2017
2
TABLE 3 - RUN MESSAGES
MESSAGE DESCRIPTION
LEAVING CHILLED LIQUID
CONTROL
The chiller is running, controlling the Leaving Chilled Liquid to the Leaving Chilled Liquid
Temperature Setpoint. There are no system conditions inhibiting this operation.
WARNING – VSD DC BUS
ACTIVE
This non-annunciating message alerts that the DC Bus is precharged or pre-regulated
for a state outside of chiller run. It is set when the VSD indicates a precharge or pre-
regulated state or DC Bus voltage >50v in the stopped state. A countdown timer shows
with this message to indicate the time remaining in a precharge or pre-regulate com-
mand while stopped.
VSD – HIGH INPUT CURRENT
LIMIT
The Chiller Input current is greater than or equal to the Active Current Limit Setpoint.
The Current Limit Setpoint is programmed over a range of 30 to 100% of the Chiller
Full Load Amps (FLA). The Active limit is the minimum of the Local, pulldown (if active),
and Remote Current Limit Setpoints in Remote mode or the remote value in BAS (ISN)
mode. While this condition is in effect, chiller capacity control is in override to reduce
current. Normal LCHLT capacity control operation is resumed and this message auto-
matically clears when the input current decreases below this limit.
The highest of the three phase input currents divided by the programmed Job Input FLA
is compared to the limit for this override.
VSD – INPUT PULLDOWN LIMIT
The chiller input current will be limited by the pulldown demand limit setpoint. The mes-
sage clears when the pulldown demand time expires.
TABLE 4 - MBC STARTUP MESSAGES
MESSAGE DESCRIPTION
WAITING FOR CHILLED
LIQUID FLOW
The chilled liquid ow switch input is not reading voltage indicating the presence of
chilled liquid ow from the ow switch. Indication of chilled liquid ow is required during
the MBC Startup state to allow transition to chiller run.
WAITING FOR MBC
LEVITATION
The OptiView has issued a MBC Levitate command to the MBC and is waiting for
conrmation from the MBC that De-levitated mode is OFF, Levitated mode is ON, and
the input from the digital Rotation Allowed contacts on the MBC is high at OptiView I/O
board terminal TB3-30. This message precedes “Waiting for Chilled Liquid Flow”.
WAITING FOR VSD
PREREGULATION
The OptiView has issued a VSD Pre-Charge/Pre-Regulate command to the VSD and is
waiting for conrmation from the VSD that it has achieved regulated DC bus voltage and
is awaiting a run command. this message precedes “Waiting for MBC Levitation”.
TABLE 5 - START INHIBIT MESSAGES
MESSAGE DESCRIPTION
ANTI-RECYCLE XXMIN/SEC
The chiller is inhibited from starting because the anti-recycle time has not yet elapsed.
Time remaining is displayed. A 15 second delay exists from Stop to Start.
LINE FREQUENCY NOT SET
This start inhibit is set when the Line Voltage setpoint is “INVALID”. Line Frequency is
set invalid on a new or cleared BRAM until programmed.
LINE VOLTAGE NOT SET
This start inhibit is set when the Line Voltage setpoint is “INVALID”. Line Voltage is set
invalid on a new or cleared BRAM until programmed.
PRV NOT CALIBRATED The Pre-rotation vanes calibration procedure has not yet been performed.
VGD NOT CALIBRATED The Variable Geometry Diffuser calibration procedure has NOT yet been performed.