York YR Manual page 89

FORM 160.81-O1 (1020)
ISSUE DATE 10/05/2020
to less than 37°F. This would generally be indicative
of a disconnected or defective sensor. If all three SCR
Modules are indicating a temperature of less than 37°F,
the SCR Module cooling pump turns ON. This is ac-
complished by disconnecting all three sensors. This
feature allows Service Technicians to run the cooling
pump while filling the cooling system by disconnect-
ing plugs P2, P3 and P4 in the LCSSS.
LCSSS - RUN SIGNAL
The Liquid Cooled Solid State Starter receives two
start signals from the Control Center simultaneously;
one via the serial communications link and one via the
start relay TB6-24 in the Control Center. If they are
not received within 5 seconds of one another, 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 combina-
tion determines allowable "100% FLA" setpoint range;
7L-35 to 260A, 14L-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. Refer
to YORK Starter Service Manual 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 main-
tain 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 3Hz/second can be
tolerated. The chiller will automatically restart when
lock has resumed.
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 20 seconds.
The chiller will automatically restart when the voltage
in all phases returns to the restart level. The thresholds
are as follows:
SUPPLY VOLTAGE SHUTDOWN
RANGE (VOLTS) (VOLTS)
Disabled
200-208
220-240
380
JOHNSON CONTROLS
RESTART
(VOLTS)
None N/A
160 174
185 200
305 331
SECTION 3 - DISPLAY MESSAGES
SUPPLY VOLTAGE SHUTDOWN
RANGE (VOLTS) (VOLTS)
400
415
440-480
550-600
LCSSS - HIGH SUPPLY LINE VOLTAGE
The Liquid Cooled Solid State Starter Logic/Trigger
Board has detected that the compressor motor AC pow-
er line voltage, in any phase, exceeded the high line
voltage threshold continuously for 20 seconds. The
chiller will automatically restart when the voltage in
all phases returns to the restart level. The thresholds
are as follows:
SUPPLY VOLTAGE SHUTDOWN
RANGE (VOLTS) (VOLTS)
Disabled None
200-208
220-240
380
400
415
440-480
550-600
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 in-
terrupted. The chiller will automatically restart when
communications are restored.
LCSSS - LOGIC BOARD POWER SUPPLY
Following application of power, this message is dis-
played 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 less than or equal to 30% of the
lowest value of the programmed voltage range. If the
programmed voltage range is "Disabled", a value of
60VAC is used as the threshold. The chiller will auto-
matically restart when the line voltage is more than the
shutdown threshold. The voltage range is programmed
by a Service Technician following instructions in Op-
tiView Control Center Service Instructions (Form
160.81-M1).
RESTART
(VOLTS)
320 349
335 362
370 400
460 502
RESTART
(VOLTS)
N/A
227 226
262 261
415 414
436 435
454 453
524 523
655 654
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