JOHNSON CONTROLS
107
SECTION 3 - OPTIVIEW DISPLAY MESSAGES
FORM 160.10-O1
ISSUE DATE: 4/27/2018
3
of a starter initiated shutdown with twenty (20) sec-
onds of the shutdown, the microboard assumes the
cause is not forthcoming and that message is re-
placed with this message. The chiller can be started
when the motor controller LCSSS stop contacts close.
A missing interlock jumper between starter logic/
trigger board J1-1 and J1-12 will also produce this
message.
LCSSS – POWER FAULT
The liquid cooled solid state starter logic/trigger board
has detected that the compressor motor current in one
or more phases has decreased to less than 10% of the
FLA for a minimum of one (1) line cycle. This check is
inhibited during the first four (4) seconds of chiller op-
eration and until the motor current is above 25% of the
Job FLA. The chiller will automatically restart upon
completion of SYSTEM COASTDOWN.
LCSSS – LOW PHASE (X) TEMPERATURE
SENSOR
The liquid cooled solid state starter logic/trigger board
has detected that the temperature of the starter phase
A, B or C (designated as X above) Silicon Controlled
Rectifier (SCR) Module has decreased below 37°F.
This would generally be indicative of a disconnected
or defective sensor. If all three SCR modules are indi-
cating a temperature of less than 37°F, the SCR module
cooling pump turns on. This is accomplished by dis-
connecting all three sensors. This feature allows ser-
vice technicians to run the cooling pump while filling
the cooling system by disconnecting plugs P2, P3 and
P4 in the LCSSS.
LCSSS – RUN SIGNAL
The liquid cooled solid state starter receives two start
signals from the OptiView Control Center simultane-
ously; one via the serial communications link and one
via the start relay TB6-24 in the control center. If the
signals are not received within 5 seconds of one anoth-
er, a cycling shutdown is performed and this message
is displayed. This is generally indicative of defective
wiring.
LCSSS – INVALID CURRENT SCALE
SELECTION
There is an invalid compressor motor current scale
jumper combination installed in the liquid cooled solid
starter logic/trigger board, J1. Jumper combination de-
termines allowable 100% FLA setpoint range; 7L - 35
to 260A, 14 L- 65 to 510A, 26L - 125 to 850A and
33L-215 to 1050A. The chiller will be permitted to
start when the jumpers are configured correctly. Re-
fer to the Solid State Starter MOD “B” – Operation/
Service Manual (Form 160.00-O2) for valid jumper
configurations.
LCSSS – PHASE LOCKED LOOP
The liquid cooled solid state starter logic/trigger board
phase locked loop circuit was not able to maintain lock
with phase A of the power line. This could be caused
by a power line anomaly such as sag or jitter. A power
line frequency jitter of up to 3 Hz/second can be toler-
ated. The chiller will automatically restart when lock
has resumed.
LCSSS – LOGIC BOARD PROCESSOR
Communication between the V25 Microprocessor and
Digital Signal Processor (DSP) on the liquid cooled
solid state starter logic/trigger board has been inter-
rupted. The chiller will automatically restart when
communications are restored.
LCSSS – LOGIC BOARD POWER SUPPLY
This message is displayed after a loss of power. Fol-
lowing application of power, this message is displayed
and a snapshot of the LCSSS parameters and time of
power failure are sent to the control center.
LCSSS – PHASE LOSS
The liquid cooled solid state starter logic/trigger board
has detected the line-to-line RMS voltage in any phase
has decreased to 30% or below the lowest value of the
programed voltage range. If the programmed voltage
range is DISABLED, a value of 60VAC is used as the
threshold. The chiller will automatically restart when
the line voltage is higher than the shutdown threshold.
Service technicians program the voltage range follow-
ing instructions in the Solid State Starter MOD “B” –
Operation/Service Manual (Form 160.00-O2).
LCSSS – LOW SUPPLY LINE VOLTAGE
The liquid cooled solid state starter logic/trigger board
has detected that the compressor motor AC power line
voltage, in any phase, decreased below the low line
voltage threshold continuously for twenty (20) sec-
onds. The chiller will automatically restart when the
voltage in all phases reaches the restart level. Refer to
Table 7 for Voltage Thresholds.
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