FORM 160.54-O1
147
JOHNSON CONTROLS
2
inhibited from further opening. This message automatically
clears and the Vanes are permitted to open when the Evapo-
rator pressure increases to the reset value.
Warning Threshold (PSIG) Reset Threshold (PSIG)
Water Brine Water Brine
R22 56.2 +1.9 >Safety Setpoint 57.5 +3.2>Safety Setpoint
R134a 27.0 +2.0 >Safety Setpoint 28.0 +3.0>Safety Setpoint
“WARNING – VANES UNCALIBRATED –
FIXED SPEED”
The Compressor Motor Variable Speed Drive (VSD) is
operating Fixed Speed (full speed) mode because the
Pre-rotation Vanes position potentiometer calibration
has not been performed.
“ WA R N I N G – H A R M O N I C F I LT E R –
OPERATION INHIBITED”
The compressor Motor variable Speed Drive (VSD)
Harmonic Filter has been inhibited. Refer to VSD
Service manual 160.00-M1. Harmonic lter operation
should not be altered by anyone other than a qualied
Service technician.
“WARNING – HARMONIC FILTER – DATA
LOSS”
Communications between the Harmonic Filter Logic Board
and the Compressor Motor Variable Speed Drive (VSD)
Logic Board or the Adaptive Capacity Control Board is not
occurring. While this condition exists, all Filter related pa-
rameters are displayed as X’s. This message automatically
clears when communications are restored.
“WARNING – HARMONIC FILTER – INPUT
FREQUENCY RANGE”
The power line frequency detected by the Compressor
motor Variable Speed Drive (VSD) Harmonic Filter is
outside the range of 58 to 62 Hz (60 Hz), or 49 to 51 Hz
(50 Hz). While this condition exists, all Filter related
parameters are displayed as X’s. This message automati-
cally clears when the line frequency is within range.
“WARNING – VANES UNCALIBRATED”
The Hot Gas Bypass feature is enabled, but the Pre-
rotation vanes calibration procedure has not yet been
performed.
“WARNING – EXTERNAL I/O – SERIAL
COMMUNICATIONS”
Serial communications between the Microboard and the
optional Analog I/O Board has been interrupted for at
least 20 seconds.
“WARNING – EXCESS SURGE DETECTED”
(Flash Memory Card version C.MLM.01.05.xxx and
later)
(Applies only if Surge Protection SHUTDOWN feature
is Disabled)
The Surge Window Count has exceeded the Count
Limit. Message can be manually cleared after the Surge
Window Count is less than or equal to the Count Limit,
or the SHUTDOWN feature is Enabled or the chiller
is stopped. To clear message press WARNING RESET
key on HOME Screen when logged in at OPERATOR
(or higher) access level.
“WARNING – SURGE PROTECTION – EXCESS
SURGE LIMIT”
(Flash Memory Card version C.MLM.01.05.xxx and
later)
(Applies only if Surge Protection EXTENDED RUN
feature is Enabled)
Displayed during the Surge Protection 10 minute Ex-
tended Run period. This period begins when the Surge
Window Count exceeds the Count Limit. During this
period, the Pre-rotation Vanes are driven closed. When
10 minutes have elapsed, this message and the Pre-
rotation Vanes load inhibit are automatically cleared.
Message and load inhibit are also cleared when the
chiller is shutdown.
If the optional Hot Gas Bypass feature
is enabled, the valve position must be
at 100% before the Extended Run is
implemented. If the chiller is chiller is
equipped with a compressor motor Vari-
able Speed Drive, the output frequency
must be at full speed (50 Hz/60 Hz) be-
fore this control can be implemented.
“WARNING – CONDENSER OR VGD SENSOR
FAILURE”
(Software version C.MLM.01.14.xxx (and later) or
C.OPT.01.14.306 (and later))
The difference between the Stall Pressure Transducer
output and the Condenser Pressure Transducer output
has exceeded 0.28 VDC for 3 continuous minutes
while the chiller was running. This feature veries the
operation of the Stall Transducer and the Condenser
transducer. Since both transducers are measuring essen-
tially the same pressure, both outputs should be within
the specied tolerance. 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.
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