SECTION 3 - DISPLAY MESSAGES
JOHNSON CONTROLS
179
FORM 160.54-O1
ISSUE DATE: 9/10/2014
3
Warning – Surge Protection – Excess Surge
Limit
(Flash Memory Card version C.MLM.01.05.xxx and
later)
(Applies only if Surge Protection Extended Run fea-
ture 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 imple
-
mented. If the chiller is chiller is equipped
with a Compressor Motor Variable Speed
Drive, the output frequency must be at full
speed (50Hz/60Hz) before 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 0.28VDC for 3 continuous minutes while
the chiller was running. This feature verifies the opera-
tion of the Stall transducer and the Condenser trans-
ducer. Since both transducers are measuring essentially
the same pressure, both outputs should be within the
specified tolerance. This message must be manually
cleared. It will be displayed until the transducer out-
puts 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) is driven to the full open position
and held there until this warning is manually cleared.
When cleared, the VGD returns normal operation.
Warning – Loss of Subcooler Liquid Seal
(Software version C.OPT.01.25C.308 (and later))
This Warning is displayed if the chiller has been run-
ning for 30 minutes or more and the Drop Leg Tem-
perature is less than the Return Condenser Liquid
Temperature continuously for two minutes. Setting the
Drop Leg Sensor installed to Disabled will prevent this
warning from being displayed.
Warning – Harmonic Filter – Not Running
(Software version C.OPT.01.23.307 and later)
This warning is set when all of the following are true
for 20 continuous seconds:
•
Chiller is running
•
Filter is enabled
•
Filter present status is true
•
Run Time greater than 20 seconds
•
Filter operating mode is stopped
This warning is released when the chiller is stopped,
but will be displayed until manually cleared using the
WARNING RESET key when logged in at OPERA-
TOR (or higher) access level.
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 – Liquid Level Setpoint not Achieved
(Software version C.OPT.01.25C.308 (and later))
Automatic reset warning message is displayed when
the Refrigerant Level is not or - 15% of the
Refrigerant Level Setpoint for 10 continuous minutes
after the chiller has been running for 30 minutes. It
will clear when within the 15% range or the chiller is
stopped.