York YK-EP Operation And Maintenance Manual page 217

VSD – 105% Motor Current Overload
This shutdown is generated by the VSD Logic Board and it indicates that a motor overload has
occurred. The shutdown is generated when the VSD Logic Board has detected that at least 1 of the
3 output phase currents has exceeded 105% of the chiller Full Load Amps (FLA) value for greater
than 7 seconds. The chiller FLA value is set by adjustment of the FLA potentiometer on the VSD
Logic Board. The chiller can be started after the RESET push-button on the VSD Logic Board is
pressed and the Operator presses the WARNING RESET button.
VSD – High Phase A Inverter Heatsink Temperature
(Style D VSD)
This shutdown will occur if the heatsink temperature exceeds 158°F on any of the output pole
assemblies. This shutdown will seldom occur. In most cases where the coolant temperature has
risen abnormally, the VSD will shut down on Ambient Temperature @ 140.0°F before the heatsinks
can reach 158°F. If this message is displayed, make sure there is adequate coolant level, ascertain
the pump is operating when the chiller is running, and check the strainer in the primary of the heat
exchanger for clogs and silt. The chiller can be started after the fault condition clears, the RESET
button on the VSD Logic Board is pressed and the Operator presses the WARNING RESET button.
VSD – High Phase B Inverter Heatsink Temperature
(Style D VSD)
See PHASE A message above.
VSD – High Phase C Inverter Heatsink Temperature
(Style D VSD)
See PHASE A message above.
VSD – High Converter Heatsink Temperature
(Style D VSD)
See PHASE A message above.
VSD – High Converter Heatsink Temperature
(Applicable to VSD with Part Number 371-02767-XXX (60 Hz) and 371-03700-XXX (50 Hz))
This shutdown will occur if the heatsink temperature exceeds 170°F. The chiller can be started after
the fault condition clears and the Compressor Switch is placed in the Stop-Reset (O) position.
VSD – High Inverter Baseplate Temperature
(Applicable to VSD with Part Number 371-02767-XXX (60 Hz) and 371-03700-XXX (50 Hz))
This shutdown will occur if the baseplate temperature exceeds 175°F. The chiller can be started
after the fault condition clears, the RESET button on the VSD Logic Board is pressed and the
Operator presses the WARNING RESET button.
VSD – High Phase A 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 Operator presses the WARNING RESET button.
VSD – High Phase B Inverter Baseplate Temperature
(VSD part number 371-03789-xxx (503HP 60 Hz; 419HP 50 Hz)
YK-EP Style B Centrifugal Chiller 217