York YK-EP Operation And Maintenance Manual page 83

Table 71: Display
Field/LED
Access level
name
Oil Pump
Drive
Command
Frequency
Variable
Speed
Oil Pump
Control
Mode
Next Oil Seal
Service
Lubrication
Setpoint Oil
Pressure
Oil Pump
Drive
Command
Frequency
Manual
Oil Pump
Operation
Time Left
Table 72: Programmable
Button Access level
Raise Service
Lower Service
Set Service
YK-EP Style B Centrifugal Chiller
Description
– Displays, in Hertz, the frequency being used to power the Oil Pump.
Displays the control mode of the oil pump. It will show the following
messages depending on what the system is doing:
• Off
• Pulldown Fixed
• Pulldown Pre-Lube
–
• Pulldown Running
• Auto
• Manual
• Hold
This display will show the time remaining until the next Seal
Lubrication is necessary, when this function is enabled.
(Variable Speed Oil Pump Only) The Variable Speed Oil Pump (VSOP)
operates to control to a defined Oil Pressure value. During prelube,
and for the first 15 seconds after prelube, this setpoint value is 45.0
–
PSID. During this time, this field will display the target value. After
15 seconds, this value will display the user-programmed setpoint Oil
Pressure.
(Variable Speed Oil Pump Only) Displays the actual speed command
being sent to the VSOP. This value could be the result of automatic
–
control based on the Oil Pressure Setpoint, or the result of a manual
speed command.
Displays the time remaining in the 10-minute Manual Oil Pump
–
operation described below.
Description
This key puts the VSOP control into manual mode and increases the
present speed command by 0.5 Hz to a maximum of 60.0 Hz.
This key puts the VSOP control into manual mode and decreases the
present speed command by 0.5 Hz to a minimum of 25.0 Hz.
This key allows the user to specify the manual speed which the VSOP
will run between 25 and 60 Hz.
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