York YZ MODEL A - TABLE 6 - Run Messages; TABLE 7 - MBC Startup Messages; TABLE 8 - Start Inhibit Messages

JOHNSON CONTROLS
91
SECTION 3 - OPTIVIEW™ CONTROL CENTER FUNCTIONS AND NAVIGATION
FORM 161.01-OM1
ISSUE DATE: 6/8/2018
3
TABLE 6 - RUN MESSAGES
MESSAGE DESCRIPTION
LEAVING CHILLED LIQUID
CONTROL
The chiller is running, controlling the Leaving Chilled Liquid to the Leaving Chilled Liquid
Temperature Setpoint. No system conditions is 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 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 automatically
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 7 - MBC STARTUP MESSAGES
MESSAGE DESCRIPTION
WAITING FOR FLOW
The chilled liquid or condenser ow switch input is not reading voltage indicating no
presence of ow from the ow switch. Indication of ow is required during the M 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 the Levitated mode is ON, and the input from the digital
contacts on the MBC is high at OptiView I/O board terminal TB15-18. This message
precedes “Waiting for Chilled Liquid Flow”.
WAITING FOR VSD
PREREGULATION
The OptiView has issued a VSD Pre-Charge command to the VSD and is waiting for
conrmation from the VSD that it has achieved regulated DC bus voltage and is await-
ing a run command. This message precedes “Waiting for MBC Levitation”.
WAITING FOR ZERO
MOTOR SPEED
The Motor Speed is > 0.001Hz. The message will be removed when the motor speed is
<= 0.001Hz.
TABLE 8 - START INHIBIT MESSAGES
MESSAGE DESCRIPTION
LINE FREQUENCY NOT SET
This start inhibit is set when the Line Frequency setpoint is “INVALID”. Line Frequency
is set invalid on a new or cleared Flash Memory 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 Flash Memory until programmed.
VGD STROKE NOT CALIBRATED
The Variable Geometry Diffuser stroke calibration procedure has NOT yet been per-
formed.
VGD ACTUATOR FEEDBACK
NOT CALIBRATED
The Variable Geometry Diffuser feedback calibration has not yet been performed.
MBC - INITIALIZATION
FAILURE
OptiView was unable to read a valid validation key code over serial communications
from the MBC.
MBC - INITIALIZATION
IN PROGRESS
OptiView is initializing communications with the MBC.