FORM 160.54-O1
ISSUE DATE: 9/10/2014
JOHNSON CONTROLS
196
SECTION 3 - DISPLAY MESSAGES
Thrust Bearing – High Oil Temperature
(Not applicable to Flash Memory Card version
C.MLM.01.03 and later)
The temperature of the oil in the High Speed Drain
Line, as sensed by the Proximity Probe, has increased
to greater than or equal to 250.0°F.
This shutdown must be evaluated by a
qualified Service Technician prior to
starting the chiller. Starting the chiller
without this evaluation could result in
severe compressor damage. To prevent
the chiller from starting without the
proper evaluation, restart is inhibited until
the temperature decreases to less than
180.0°F and a special reset procedure
is performed by the Service Technician.
The evaluation and reset procedure are
contained in OptiView Control Center -
Service Instructions (Form 160.54-M1).
Thrust Bearing – Oil Temperature Sensor
(Not Flash Memory Card version C.MLM.01.03 and later)
The temperature of the oil in the High Speed Drain
Line, as sensed by the Proximity Probe, has decreased
to less than 50.0°F during System Run or the last 10
seconds of System Prelube.
This shutdown must be evaluated by a
qualified Service Technician prior to
starting the chiller. Starting the chiller
without this evaluation could result in
severe compressor damage. To prevent the
chiller from starting without the proper
evaluation, restart is inhibited until the
temperature increases to greater than
50.0°F and a special reset procedure is
performed by the Service Technician.
The evaluation and reset procedure are
contained in OptiView Control Center -
Service Instructions (Form 160.54-M1).
Thrust Bearing – Limit Switch Open
(All “P and Q” compressors and Style F Chillers with
G or H5-8 compressors)
The High Speed Thrust Bearing Limit Switch contacts,
connected to TB3-81, have opened. This occurs when
the Bearing position decreases to less than the allowed
position.
This shutdown must be evaluated by a
qualified Service Technician prior to
starting the chiller. Starting the chiller
without this evaluation could result in
severe compressor damage. To prevent
the chiller from starting without the
proper evaluation, restart is inhibited
until the switch contacts have closed and
a special reset procedure is performed
by the Service Technician. The evalua
-
tion and reset procedure are contained
in OptiView Control Center - Service
Instructions (Form 160.54-M1).
Watchdog – Software Reboot
The Microboard’s software Watchdog initiated a Mi-
croprocessor reset because it detected that a portion of
the chiller operating program was not being executed.
The result of this reset is a safety shutdown and re-ini-
tialization of the program. This is generally indicative
of a severe electrical power disturbance or impending
Microboard Failure. The chiller can be started after the
Compressor Switch is placed in the Stop-Reset (O) po-
sition.
Surge Protection – Excess Surge
(Flash Memory Card version C.MLM.01.05.xxx and
later) (Applies only if Surge Protection Shutdown fea-
ture is Enabled)
The Surge Window Count surge events exceeded the
Count Limit Setpoint. If the Surge Protection Extended
Run feature is Disabled, the chiller shuts down as soon
as the count exceeds the limit. If the Extended Run
feature is Enabled, this shutdown occurs only if the
count exceeds the limit at completion of the 10 minute
Extended Run period. The chiller can be started after
the Compressor Switch is placed in the Stop-Reset (O)
position.
Motor – Lack of Bearing Lubrication
(Software version C.MLM.01.14.xxx (and later) or
C.OPT.01.14.306 (and later))
The Operating Hours Since Last Motor Lubrication has
exceeded 1400 hours. This message replaces WARN-
ING MOTOR BEARING LUBE REQUIRED above.
This safety shutdown remains in effect until the Op-
