York YT Specifications download pdf (Page 94)

YORK INTERNATIONAL

FORM 160.55-O1 (402)

neously; one via the serial communications link and one

via the start relay TB6-24 in the OptiView Control Cen-

ter. If they are not received within 5 seconds of one

another, a cycling shutdown is performed and this mes-

sage is displayed. This is generally indicative of defec-

tive 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

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 3 Hz/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 Range (Volts) Shutdown(Volts) Restart(Volts)

Disabled None N/A

200-208 160 174

220-240 185 200

380 305 331

400 320 349

415 335 362

440-480 370 400

550-600 460 502

“LCSSS – HIGH 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, exceeded the high line volt-

age 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 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 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 com-

munications are restored.

“LCSSS - PHASE LOSS”

(Flash Memory Card version C.MLM.02.01 or

later)

The Liquid Cooled Solid State Starter Logic/Trigger

Board has detected the line-to-line RMS voltage in any

phase has decreased to < 30% of the lowest value of

the programed voltage range. If the programmed volt-

age range is “Disabled”, a value of 60VAC is used as

the threshold. The chiller will automatically restart when

the line voltage is > the shutdown threshold. The volt-

age range is programmed by a Service technician fol-

lowing instructions in Service Manual 160.55-M1.

“LCSSS – PHASE ROTATION/LOSS”

(Flash Memory Card version C.MLM.02.00

only)

The Liquid cooled Solid State Starter Logic/Trigger

Board has detected that the three-phase compressor

motor power line voltage phase rotation is not correct

or the line-to-line voltage in any phase has decreased to

<30% of nominal. The chiller will automatically restart

when the power line conditions are acceptable.

“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 OptiView Control

Center.

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

OptiView Control Center

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York YT Specifications Page 94

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