York YK-EP Operation And Maintenance Manual Download

Page: 218 / 268

The chiller has shutdown because the baseplate temperature has increased to greater than 158°F.

The chiller can be started after the fault condition clears, the RESET button on the VSD Logic Board

and the Operator presses the WARNING RESET button.

VSD – High Phase C Inverter Baseplate Temperature

(VSD part number 371-03789-xxx (503HP 60 Hz; 419HP 50 Hz)
The chiller has shutdown because the baseplate temperature has increased to greater than 158°F.

The chiller can be started after the fault condition clears, the RESET button on the VSD Logic Board

and the Operator presses the WARNING RESET button.

VSD – Precharge Lockout

If the VSD fails to make pre-charge, the relay will drop out for ten seconds while the VSD fans and

water pumps remain energized and the pre-charge resistors cool down. After this, the VSD will

attempt to initiate pre-charge again.
If the VSD fails to make pre-charge after 3 consecutive attempts, the unit will shut down, lockout,

and display this message: The chiller can be started after the Operator presses the WARNING RESET

button.

Harmonic Filter – High Heatsink Temperature

(Style D VSD)
The Harmonic Filter power assembly has one heatsink transmitter on the 503 HP units, and two

heatsink transmitter on the 790 HP units. If the temperature on any heatsink exceeds 167°F, the

unit will shut down. This message is usually an indication of a low coolant level in the VSD cooling

loop. The chiller can be started after the fault condition clears, the OVERTEMP RESET button on the

Filter Logic Board is pressed and the Operator presses the WARNING RESET button.

Harmonic Filter – High Baseplate Temperature

(Applicable to VSD with part number 371-02767-XXX (60 Hz) and 371-03700-XXX (50 Hz))
This shutdown occurs when the baseplate temperature exceeds 174°F (79°C). The chiller can be

started after the fault condition clears, the OVERTEMP RESET button on the Filter Logic Board is

pressed and the Operator presses the WARNING RESET button.

Harmonic Filter – High Baseplate Temperature

(VSD part number 371-03789-xxx (503HP 60 Hz; 419HP 50 Hz)
The chiller has shutdown because the baseplate temperature has increased to greater than 194°F.

The chiller can be started after the fault condition clears, the OVERTEMP RESET button on the Filter

Logic Board is pressed and the Operator presses the WARNING RESET button.

VSD – Harmonic Filter-High Baseplate Temperature

(575V/60 Hz applications)
If the baseplate temperature rises above the following limits, this shutdown is performed:
424HP - 70.0°F, 174.2°C
608HP - 88.0°F, 190.4°C

Harmonic Filter – High Total Demand Distortion

This shutdown indicates the filter is not operating correctly and the input current to the VSD/Filter

is not sinusoidal. This shutdown will occur if the TDD exceeds 25% continuously for 45 seconds.

TDD is an acronym for Total Demand Distortion, a term defined by the IEEE Std 519-2014 standard

as the total root-sum-square harmonic current distortion, in percent of the maximum demand

load current (15 or 30 min demand). In the filter option supplied by YORK, the displayed TDD is

YK-EP Style B Centrifugal Chiller

218