York YK-EP Operation And Maintenance Manual page 112

Table 110: Display only
Field/LED
Access level
name
Precharge
Relay Output
(LED)
Trigger SCR
Output (LED)
DC Bus
Voltage
DC Inverter
Link Current
Internal
Ambient
Temperature
Converter
Heatsink
Temperature
Heatsink
Temperature
– Phase A, B,
C
VSD Model Service
100% Full
Load Amps
Table 111: Programmable
Button Access level
Local Motor
Operator
Current Limit
Pulldown
Demand Operator
Limit
Pulldown
Demand Operator
Time
112
Description
Indicates whether the relay controlling the precharge output is
–
energized.
Indicates whether the relay controlling the Trigger SCR Output is
–
energized.
– Displays the DC Bus voltage as reported by the VSD.
– Displays the DC Inverter link current as reported by the VSD.
Displays the ambient temperature inside the VSD cabinet as
–
reported by the VSD.
Displays the heatsink temperature of the converter as reported by
–
the VSD.
(Labeled Baseplate Temperatures on VSD with part number
371-03789-xxx (503HP 60Hz; 419HP 50Hz). Displays the heatsink
–
(baseplate) temperature of each of the 3-phase voltage regulators
as reported by the VSD.
Displays the horsepower configuration of the Variable Speed Drive
control.
– Displays the Full Load Amps value as reported by the VSD.
Description
Allows the user to specify the maximum allowed motor current (as
a percentage of FLA). When the motor current reaches this value,
the Pre-Rotation Vanes will not be permitted to open further. If the
motor current rises above this value, the Pre-Rotation Vanes will
close to reduce the current to this value.
Allows the user to specify the current limit value (as a percentage
of FLA) to which the chiller will be limited during the specified
pulldown limit time. This value will override the Motor Current
Limit value during this time period. This function is used to provide
energy savings following chiller start-up.
Allows the user to set a period of time for which the pulldown
demand limit will be in effect after the chiller starts.
YK-EP Style B Centrifugal Chiller