York YZ MODEL A - Page 102

JOHNSON CONTROLS
102
FORM 161.01-OM1
ISSUE DATE: 6/8/2018
SECTION 3 - OPTIVIEW™ CONTROL CENTER FUNCTIONS AND NAVIGATION
MESSAGE DESCRIPTION
ISOLATION VALVES -
NOT OPENED
The optional brine freeze protection motorized isolation valves Open output is energized
40 seconds but the feedback from the valve limit switch does not indicate it opened for 3 continu-
ous seconds. This cycling fault is released when the chiller is stopped with the run command
removed. The chiller can be started when the condition is released and the OptiView panel
CLEAR FAULTS key is pressed.
MBC - DC BUS FUSE
This Safety is set when the MBC detects no voltage on the DC Bus indicating an open DC BUS
Fuse. The chiller can be started when the MBC DC BUS FUSE Fault is corrected and the OptiV-
iew panel CLEAR FAULTS key is pressed.
MBC – GROUND FAULT
This Safety Shutdown is set when the MBC detects a Ground Fault condition. The chiller can be
started when the MBC Ground Fault is corrected and the OptiView panel CLEAR FAULTS key is
pressed.
MBC – HIGH BEARING
J TEMPERATURE
This Safety Shutdown is set when the MBC control board detects the J Bearing Temperature
is too high. The chiller can be started when the condition is released and the OptiView panel
CLEAR FAULTS key is pressed.
MBC – HIGH BEARING
H1 TEMPERATURE
This Safety Shutdown is set when the MBC control board detects the H1 Bearing Temperature
is too high. The chiller can be started when the condition is released and the OptiView panel
CLEAR FAULTS key is pressed.
MBC – HIGH BEARING
H2 TEMPERATURE
This Safety Shutdown is set when the MBC control board detects the H1 Bearing Temperature
is too high. The chiller can be started when the condition is released and the OptiView panel
CLEAR FAULTS key is pressed.
MBC – HIGH BEARING
K TEMPERATURE
This Safety Shutdown is set when the MBC control board detects the K Bearing Temperature
is too high. The chiller can be started when the condition is released and the OptiView panel
CLEAR FAULTS key is pressed.
MBC – HIGH
AMPLIFIER
TEMPERATURE
This Safety Shutdown is set if the MBC Amplier Temperature is too high. The chiller can be
started when the condition is released and the OptiView panel CLEAR FAULTS key is pressed.
MBC – HIGH
AMPLIFIER VOLTAGE
This Safety Shutdown is set if the MBC Amplier Voltage is too high. The chiller can be started
when the condition is released and the OptiView panel CLEAR FAULTS key is pressed.
MBC – HIGH GATE
VOLTAGE
This Safety Shutdown is set if the MBC Gate Voltage is too high. The chiller can be started when
the condition is released and the OptiView panel CLEAR FAULTS key is pressed.
MBC – LOW GATE
VOLTAGE
This Safety Shutdown is set if the MBC Gate Voltage is too low. The chiller can be started when
the condition is released and the OptiView panel CLEAR FAULTS key is pressed.
MBC – EXCESSIVE
SHUTDOWNS
This Safety Shutdown is set if 3 MBC Cycling Shutdowns occur in a 15 minute window. It is
released when the chiller is stopped. The 15 minute window begins with the rst MBC fault. The
chiller can be started when the condition is released and the OptiView panel CLEAR FAULTS
key is pressed.
MBC- FAULT
CONTACTS OPEN
This Safety Shutdown is set when the MBC detects a fault condition and opens a relay contact
which is read by the 03631 I/O Board at TB15-70. The fault is cleared when the MBC contact
closes.
MBC – INITIALIZATION
FAILURE
This Safety Shutdown is set when the MBC does not correctly initialize communications with the
OptiView panel. The chiller can be started when the condition is released and the OptiView panel
CLEAR FAULTS key is pressed.
MBC – HIGH DC BUS
VOLTAGE
This Safety Shutdown is set when the MBC detects that the MBC DC 300VDC Bus is too
high. The chiller can be started when the condition is released and the OptiView panel CLEAR
FAULTS key is pressed.
MBC - HIGH HEATSINK
TEMPERATURE
This Safety Shutdown is set when the MBC Heatsink Temperature exceeds the trip point. The
chiller can be started when the temperature drops below the trip point and the OptiView panel
CLEAR FAULTS key is pressed.
TABLE 12 - SAFETY SHUTDOWN MESSAGES (CONT'D)