York YST Operation Manual page 135

FORM 160.67-O1
ISSUE DATE: 4/1/2015
" Warning – Turbine – Supply oil low
pressure"
This message only applies to when the turbine is sup-
plied with an auxiliary oil pump and MSSP6-Turbine
Lubrication Type is set for Pump on the Configura-
tion Screen 1. It appears when the input signal from
the Turbine Supply Oil Pressure Transmitter is below
the PSP10-Turbine Auxiliary Oil Pump On setpoint
shown on the Pressure Setpoints Screen indicating that
the shaft driven oil pump on the turbine is not provid-
ing sufficient oil pressure and the auxiliary oil pump
is started. This check is bypassed at speeds below the
SSP7-Turbine Auxiliary Oil Pump Activate setpoint
shown on the Speed Setpoints Screen. This message
will automatically clear when the supply oil pressure
increases to 0.1 PSIG above the PSP10-Turbine Auxil-
iary Oil Pump On setpoint.
" Warning – Turbine auxiliary oil pump
overrun"
This message only applies to when the turbine is sup-
plied with an auxiliary oil pump and MSSP6-Turbine
Lubrication Type is set for Pump on the Configuration
Screen 1. It appears when the input signal from the
Turbine Supply Oil Pressure Transmitter is below the
PSP9-Turbine Auxiliary Oil Pump Off setpoint shown
on the Pressure Setpoints Screen indicating that the
shaft driven oil pump on the turbine is not providing
sufficient oil pressure and the auxiliary oil pump has
been running for 5 minutes. This check is bypassed at
speeds below the SSP7-Turbine Auxiliary Oil Pump
Activate setpoint shown on the Speed Setpoints Screen.
This message will be displayed until the Warning Reset
Key on the Home Screen is pressed in the OPERATOR
(or higher) access mode. This also resets the overrun
timer so that the message will appear again if the oil
pump starts and runs for 5 minutes.
" Warning - Turbine – Supply oil high
Temperature"
This message only applies to when the turbine is sup-
plied with an auxiliary oil pump and MSSP6-Turbine
Lubrication Type is set for Pump on the Configura-
tion Screen 1. It appears when the input signal from
the Turbine Supply Oil RTD Temperature Transmitter
is above the TSP8-Turbine Supply Oil High Tempera-
ture Alarm setpoint shown on the Alarm/Shutdown
Setpoints Screen. The message will automatically clear
when the input signal decreases to 0.1 °F below the
Alarm Setpoint.
JOHNSON CONTROLS
SECTION 2 - OPTIVIEW CONTROL CENTER INTRODUCTION
" Warning - Turbine – Shaft end bearing high
Temperature"
This message only applies to when the turbine is sup-
plied with bearing RTD sensors and MSSP14-Turbine
Bearing Temperature Sensors is set for Enabled on the
Configuration Screen 1. It appears when the input sig-
nal from the Turbine Shaft End Bearing RTD Tempera-
ture Transmitter is above the TSP4-Turbine Shaft End
Brg High Temp Alarm setpoint shown on the Alarm/
Shutdown Setpoints Screen. The message will auto-
matically clear when the input signal decreases to 0.1
°F below the Alarm Setpoint.
" Warning - Turbine – governor end bearing
high Temperature"
This message only applies to when the turbine is sup-
plied with bearing RTD sensors and MSSP14-Turbine
Bearing Temperature Sensors is set for Enabled on the
Configuration Screen 1. It appears when the input sig-
nal from the Turbine Governor End Bearing RTD Tem-
perature Transmitter is above the TSP6-Turbine Gov-
ernor End Brg High Temp Alarm setpoint shown on the
Alarm/Shutdown Setpoints Screen. The message will
automatically clear when the input signal decreases to
0.1 °F below the Alarm Setpoint.
"Warning – Turbine exhaust Steam high
pressure"
The input signal from the Turbine Exhaust Steam Pres-
sure Transmitter has been above the Turbine Exhaust
Steam High Pressure setpoint shown on the Alarm/
Shutdown Setpoints Screen for 10 seconds. This check
is bypassed until the chiller is in the System Run mode.
This message will automatically clear when the ex-
haust steam pressure decreases to 0.1 PSIA below the
Turbine Exhaust Steam High Pressure setpoint.
"Warning – vacuum pump overrun"
This message only applies to chillers equipped with
steam ejectors and a single vacuum pump on the steam
condenser when MSSP11-Vacuum Pump Mode on
Configuration Screen 1 is set for Ejector. The message
appears if the vacuum pump has been running continu-
ously for 15 minutes after the chiller is in the System
Run mode. This could indicate either an ejector mal-
function or a major leak in the steam condenser or ex-
haust piping. This message will be displayed until the
Warning Reset key on the Home Screen is pressed in
the OPERATOR (or higher) access mode. This also re-
sets the overrun timer so that the message will appear
again if the vacuum pump starts and runs continuously
for 15 minutes.
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