JOHNSON CONTROLS
130
FORM 160.79-O3
ISSUE DATE: 11/09/2018
SECTION 2 – OPTIVIEW CONTROL CENTER
“DISCHARGE VALVE #2 - OPEN”
The chiller (both compressors) is inhibited from start-
ing because compressor #2 Discharge Valve is not
closed. This start inhibit is released when the valve has
fully closed.
“MOTOR #1 – ANTI-RECYCLE”
The chiller (both compressors) is inhibited from start-
ing because compressor #1 motor is in the 30 minute
anti-recycle period and compressor #2 is unable to run.
This start inhibit is released when the 30 minute timer
expires.
“MOTOR #2 – ANTI-RECYCLE”
The chiller (both compressors) is inhibited from start-
ing because compressor #2 motor is in the 30 minute
anti-recycle period and compressor #1 is unable to run.
This start inhibit is released when the 30 minute timer
expires.
“MOTOR #1 – CURRENT >15% FLA”
The chiller (both compressors) is inhibited from start-
ing because a motor current of >15% FLA was detect-
ed on compressor #1 while it was not running. This
inhibit is set instantly with no delay and the oil pump
is started as soon as the motor current is detected. The
starting frequency for the Variable Speed Drive Oil
Pump is 45 Hz. This inhibit is released when the com-
pressor#1 motor current decreases to < 15% FLA and
the Clear Fault button is pressed on the Home screen.
A complete 150 second Coastdown is performed when
after the inhibit is released.
“MOTOR #2 – CURRENT >15% FLA”
The chiller (both compressors) is inhibited from start-
ing because a motor current of >15% FLA was detect-
ed on compressor #2 while it was not running. This
inhibit is set instantly with no delay and the oil pump
is started as soon as the motor current is detected. The
starting frequency for the Variable Speed Drive Oil
Pump is 45Hz. This inhibit is released when the com-
pressor#1 motor current decreases to < 15% FLA and
the Clear Fault button is pressed on the Home screen.
A complete 150 second Coastdown is performed when
after the inhibit is released.
“VANES #1 – MOTOR SWITCH OPEN”
The chiller (both compressors) is inhibited from start-
ing because the Pre-rotation Vanes of compressor #1
are not fully closed (Vane Motor Switch is open) and
compressor #2 is unable to run. This inhibit is released
when the Vanes have fully closed (Vane Motor Switch
has closed).
“VANES #2 – MOTOR SWITCH OPEN”
The chiller (both compressors) is inhibited from start-
ing because the Pre-rotation Vanes of compressor #2
are not fully closed (Vane Motor Switch is open) and
compressor #1 is unable to run. This inhibit is released
when the Vanes have fully closed (Vane Motor Switch
has closed).
Warning Messages
“WARNING – CONDENSER OR EVAPORATOR
XDCR ERROR”
The Evaporator pressure Transducer is indicating a
higher pressure than the Condenser pressure Trans-
ducer after the chiller has been running for 10 minutes.
This is indicative of a Condenser or Evaporator Trans-
ducer failure. This message will be displayed until the
condition clears and the WARNING RESET Keypad
key is pressed in OPERATOR (or higher) access level.
Condition not checked in Brine mode.
“WARNING – CONDENSER OR VGD #1
SENSOR FAILURE”
The difference between Compressor #1 Stall Pressure
Transducer output and the Condenser Pressure Trans-
ducer output has exceeded 0.28 VDC for 3 continu-
ous minutes while compressor #1 was running. This
feature verifies the operation of compressor #1 Stall
Transducer and the Condenser transducer. Since both
transducers are measuring essentially the same pres-
sure, both outputs should be within the specified toler-
ance. This message must be manually cleared. It will
be displayed until the transducer outputs are within
the acceptable range of each other and the WARNING
RESET key in SERVICE access level.
While this message is displayed, the Variable Geom-
etry Diffuser (VGD) of both compressors are driven
to the full open position (100%) and held there until
this warning is manually is cleared. When cleared, the
VGD of both compressors return to normal operation.