York OPTIVIEW - Page 130

JOHNSON CONTROLS
130
FORM 160.78-O2
ISSUE DATE: 5/22/2017
SECTION 2 - OPTIVIEW CONTROL CENTER INTRODUCTION
MESSAGE DESCRIPTION
SAFETY STOP
This is set when the panel safety stop hardware pushbutton is depressed, removing in-
put from the I/O Board terminal TB3-28 for > 500msec. continuous. It also sets the local
command to STOP. The chiller can be started when the pushbutton is released and the
OptiView panel CLEAR FAULTS key is pressed.
MBC – STARTUP FAILURE
This Safety Shutdown is set when the chiller initiates three MBC-STARTUP FAILURE
Cycling Shutdown in a 90 minute period. Refer to YORK YMC
2
Service Manual (Form
160.78-M2) for conditions necessary to complete MBC startup successfully. Check fault
history details to determine which specic conditions were not met.
MBC – UNAUTHORIZED
ROTATION
This Safety Shutdown is set when the MBC detects a rotor speed signal from the VSD
while the Levitation Mode is not activated. The MBC ESD Fault contacts open. The
MBC remains in Levitation mode with the motor shaft levitated until commanded to de-
levitate over serial comms or VSD DC bus power depletes. This shutdown is released
when the MBC Levitation or Rotation mode is activated or the VSD speed signal indi-
cates no shaft rotation. The chiller can be started when the condition is released and the
OptiView panel CLEAR FAULTS key is pressed.
MOTOR – HIGH WINDING
TEMPERATURE
This safety shutdown occurs when either of the following conditions are present:
• Any of the enabled motor winding temperatures exceeded the programmed High
Winding Temperature Shutdown Threshold of 302˚F (150˚C).
or
• The Average Winding Temperature has exceeded the programmed High Winding
Temperature Shutdown threshold for 3 continuous seconds.
The chiller can be started after all winding temperatures decreased to at least 18˚F
(10˚C) below the shutdown threshold and the COMPRESSOR is stopped. The safety
shutdown will not act on any individual winding temperature sensor that has been dis-
abled with the TEMPERATURE DISABLE Setpoint on the Motor Details Screen.
MOTOR – HIGH HOUSING
TEMPERATURE
This Safety Shutdown is set when Motor Housing Temperature is greater than or equal
to 185 °F (85 °C). This fault is released when Motor Housing Temperature is less than
158 °F (70 °C). The chiller can be started when the condition is released and the
OptiView panel CLEAR FAULTS key is pressed.
SALES ORDER - INVALID
COMPRESSOR MODEL
This safety shutdown is set when the Compressor Model eld entered on the Setpoints
– Setup –Sales Order screen does not conform to the format expected. The format is
dened below and the data can be found on the compressor nameplate if it ever needs
re-entry in the control:
MOTOR MOTOR
REV
SS/LS
IMP DIAM
SS/LS
ROTATION
SS/LS
IMP REV
SS/LS
FLOW REV
:Code
1, 2 3 - 4 5 6 7 8 9 :Position
The control uses specic characters from this eld to determine control parameters and
methods. This shutdown is initiated if any of the following are true:
• MOTOR is anything other than M1
• MOTOR REV is anything other than ‘B’
• Character other than ‘-‘ between position 3 and 4
• SS/LS IMP DIAM is anything other than 164, 174, 186, 197 or 205
• SS/LS ROTATION is anything other than ‘F’
• SS/LS IMP REV is anything other than a character ‘A’ through ‘Z’
• SS/LS FLOW REV is anything other than a character ‘A’ through ‘B’
The fault released when none of the above statements are true. Then the CLEAR
FAULTS key on the Home screen can be pressed and the chiller started.
TABLE 9 - SAFETY SHUTDOWN MESSAGES (CONT'D)