JOHNSON CONTROLS
118
FORM 160.69-O1
ISSUE DATE: 9/30/2012
SECTION 2 – OPTIVIEW CONTROL CENTER
down is performed when after the inhibit is released.
In Software version C.MLM.11.01.xxx (and earlier) or
C.OPT.11.02.300 (and earlier), the motor current must
be present for at least 10 seconds before the inhibit is
set.
“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 – REAL TIME CLOCK FAILURE”
During the initialization process that occurs when
power is applied to the Control Center, test data is writ-
ten to a location in the BRAM battery backed memory
device (IC location U52 on Microboard). This data is
then read from the BRAM and compared to the test
data. If the read data is not the same as that which was
written to the device, it is assumed the BRAM and Real
time Clock operation is defective and this message is
displayed. The BRAM should be replaced by a quali-
fied Service Technician. This message automatically
clears when the BRAM problem has been solved.
“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 SEN-
SOR FAILURE”
(Software version C.MLM.11.02.xxx (and later) or
C.OPT.11.02.300 (and later)).
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.
“WARNING – CONDENSER OR VGD #2 SEN-
SOR FAILURE”
(Software version C.MLM.11.02.xxx (and later) or
C.OPT.11.02.300 (and later)).
The difference between Compressor #2 Stall Pressure
Transducer output and the Condenser Pressure Trans-
ducer output has exceeded 0.28 Vdc for 3 continuous
minutes while compressor #2 was running. This fea-
ture verifies the operation of the compressor #2 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.