Table 179: High supply line voltage thresholds
Supply voltage range (Volts)
Shutdown (Volts)
Restart (Volts)
Disabled
None
N/A
200-208
227
226
220-240
262
261
380
415
414
400
436
435
415
454
453
440-480
524
523
550-600
655
654
LCSSS – Logic Board Processor
Communication between the Microprocessor and Digital Signal Processor (DSP) on the Liquid
Cooled Solid State Starter Logic/Trigger Board has been interrupted. The chiller will automatically
restart when communications are restored.
LCSSS – Logic Board Power Supply
Following 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 less than or equal to 30% of the lowest value of the programed
voltage range. If the programmed voltage range is Disabled, a value of 60 VAC is used as the
threshold. The chiller will automatically restart when the line voltage is greater than the shutdown
threshold. The voltage range is programmed by a Service Technician following instructions in
OptiView Control Center – Service Instructions (Form 160.76-M1)
.
Compressor motor variable speed drive: cycling shutdown
messages
The following cycling shutdown messages are displayed on Compressor Motor Variable Speed
Drive (VSD) applications only. These messages are generated by events that occur within the VSD.
The chiller will automatically restart when the cycling condition clears. Service and troubleshooting
information is contained in
Variable Speed Drive – Service Instructions (Form 160.00-M1)
.
VSD Shutdown – Requesting Fault Data
The VSD has shutdown the chiller and the Control Center has not yet received the cause of the fault
from the VSD, via the serial communications link. The VSD shuts down the chiller by opening the
Motor Controller VSD STOP CONTACTS (located on the VSD Logic Board and connected between
TB6-16 and TB6-53 in the Control Center). The Microboard in the Control Center then sends a
request for the cause of the fault to the VSD Logic Board via the Adaptive Capacity Control Board,
over the serial link. Since serial communications are initiated every 2 seconds, this message is
typically displayed for a few seconds and then replaced with one of the below listed fault messages.
VSD – Stop Contacts Open
See VSD Shutdown – Requesting Fault Data. If the Control Center’s Microboard does not receive the
cause of the fault over the Serial Link within 20 seconds, it is assumed it is not forthcoming and that
message is replaced with VSD – STOP CONTACTS OPEN message.
177
Model YK Style H Centrifugal Liquid Chillers with OptiView Control Center
