JOHNSON CONTROLS
134
FORM 160.79-O3
ISSUE DATE: 11/09/2018
SECTION 2 – OPTIVIEW CONTROL CENTER
higher) using the Motor Lube Acknowledge key on the
Motor Lubrication Screen. See the
for entry instructions. This entry implies both
motors were lubricated. The date and time of this en-
try is automatically logged as the “Date of Last Motor
Lubrication” and “Time of Last Motor Lubrication”. It
also resets the “Operating Hours Since Last Lubrica-
tion” to zero. The date this warning occurs is stored
as the “Date of Last Motor Lubrication Warning or
Fault”. This warning message will only be displayed
if the AUTO LUBE setpoint on the Motor Lubrication
Screen is disabled.
“POSSIBLE LEAK IN COMPRESSOR 1 DIS-
CHARGE VALVE”
When compressor 2 is running in the lead and compres-
sor 1 (lag) is either stopped or in the last 10 seconds
of “System Coastdown”, an open Discharge Valve is
detected on the lag compressor by comparing the lag
compressor Stall Transducer output to the Evaporator
Transducer output. If the difference is >16 PSID for at
least 1 second, this message is displayed. This check
is only performed if the lead compressor has been run-
ning for 5 or more seconds, the Evaporator Pressure
Transducer is sensing a pressure that is in range (6 –
74 PSIG) and the Stall Transducer is installed and its
output is > 0.5VDC.
“POSSIBLE LEAK IN COMPRESSOR 2 DIS-
CHARGE VALVE”
When compressor 1 is running in the lead and compres-
sor 2 (lag) is either stopped or in the last 10 seconds
of “System Coastdown”, an open Discharge Valve is
detected on the lag compressor by comparing the lag
compressor Stall Transducer output to the Evaporator
Transducer output. If the difference is >16 PSID for at
least 1 second, this message is displayed. This check
is only performed if the lead compressor has been run-
ning for 5 or more seconds, the Evaporator Pressure
Transducer is sensing a pressure that is in range (6 –
74 PSIG) and the Stall Transducer is installed and its
output is > 0.5VDC.
Routine Shutdown Messages
“REMOTE STOP”
A shutdown command has been received from a re-
mote device. Remote Stop commands can be received
in Digital Remote mode via I/O Board TB4-7/8 or in
ISN (BAS) Remote mode via the SC-EQ serial com-
munications. If the chiller is running when this occurs,
the Pre-rotation Vanes are driven fully closed prior to
shutting down the chiller.
“LOCAL STOP”
A local shutdown command has been received by plac-
ing the Soft Stop key on the Home screen.
“PLACE COMPRESSOR SWITCH IN RUN PO-
SITION”
The Control Center is in either Digital or ISN (Inte-
grated Systems Network) Remote mode. The Operator
is requested to place the COMPRESSOR Switch in the
RUN position. The Control Center will not accept a
Remote start/stop command unless the switch is in the
RUN position.
Cycling Shutdown Messages
“MULTIUNIT CYCLING – CONTACTS OPEN”
The Multiunit Cycling contacts connected to I/O
Board TB4-9, have opened to initiate a cycling shut-
down on the chiller (both compressors). If the chiller
is running when this occurs, the Pre-rotation Vanes on
the running compressors are driven fully closed prior
to shutting down the chiller. The chiller will automati-
cally restart when the contacts close.
“SYSTEM CYCLING #1 – CONTACTS OPEN”
The Remote/Local Cycling contacts connected to the
I/O Board TB4-13 have opened to initiate a cycling
shutdown on the chiller (both compressors). ). If the
chiller is running when this occurs, the Pre-rotation
Vanes on the running compressors are driven fully
closed prior to shutting down the chiller. The chiller
will automatically restart when the contacts close.
“SYSTEM CYCLING #2 CONTACTS OPEN”
The Remote/Local Cycling contacts connected to the
I/O Board TB4-95 have opened to initiate a cycling
shutdown on the chiller (both compressors). If the
chiller is running when this occurs, the Pre-rotation
Vanes on the running compressors are driven fully
closed prior to shutting down the chiller. The chiller
will automatically restart when the contacts close.