Compressor Excessive Vibration Warning Messages; Routine Shutdown Messages; Cycling Shutdown Messages - York YST Operation Manual

SECTION 2 - OPTIVIEW CONTROL CENTER INTRODUCTION
"Warning – Condenser or vgd failure"
The Condenser pressure Voltage and the Stall DC
Pressure Voltage have been greater than 0.28 volts
apart for 3 minutes, the VGD control is disabled and
the VGD is opened. This message will be displayed
until the two voltages are within 0.28 volts and the
Warning Reset key on the Home Screen is pressed in
the SERVICE (or higher) access level.
CoMpreSSor exCeSSive vibraTion
Warning MeSSageS
Since proximity probes cannot be fitted on a single
stage compressor due to internal space limitations,
casing mounted accelerometers are occasionally used
as the only alternative. However, the alarm setpoint
and delay may need to be set high enough to prevent
nuisance alarms due to stall or surge conditions.
Mechanical vibration problems should remain fairly
steady at a high level; aerodynamic problems will
appear and disappear. Therefore, it is recommended
that the normal operating vibration levels be recorded
and the vibration levels be monitored to provide an
indication of developing mechanical problems.
When MSSP18-Compressor Vibration Sensors is set
for Enabled on Configuration Screen 1, the compressor
must be fitted with two accelerometers on the rotor
support. The "Horizontal" designation refers to the
proximity probe installed at approximately 45 degrees
from the vertical center on the right side of the rotor
support when facing the shaft end of the compressor.
The "Vertical" designation refers to the proximity
probe installed at approximately 45 degrees from the
vertical center on the left side when facing the shaft
end of the compressor. When the sensors are enabled,
the following messages are also enabled:
"Warning - Compressor - horizontal
vibration"
The input signal from the Compressor Horizontal
Vibration Transmitter is above the CVSP1-Compressor
Vibration Alarm setpoint shown on the Alarm/
Shutdown Setpoints Screen. This check is bypassed
during shutdown until the start sequence is initiated.
The message will automatically clear when the input
signal decreases to 0.1 In/Sec below the Alarm Setpoint.
138
"Warning - Compressor - vertical vibration"
The input signal from the Compressor Vertical
Vibration Transmitter is above the CVSP1-Compressor
Vibration Alarm setpoint shown on the Alarm/
Shutdown Setpoints Screen. This check is bypassed
during shutdown until the start sequence is initiated.
The message will automatically clear when the input
signal decreases to 0.1 In/Sec below the Alarm Setpoint.

rouTine ShuTdoWn MeSSageS

"remote Stop"
A shutdown command has been received from a re-
mote device. Remote Stop commands can be received
in Digital Remote mode via I/O Board TB4-7/8 or
in ISN (Integrated Systems Network) Remote mode
via the MicroGateway serial communications. If the
chiller is running when this occurs, a soft shutdown
sequence is initiated.
"local Stop"
A local shutdown command has been received by plac-
ing the Keypad Start-Run-Stop/Reset Switch in the
stop (O) position.
" place Start/Stop Control Switch in run
position"
The Control Center is in either the Digital or ISN
Remote Mode. The operator is requested to place
the START/STOP Control Switch on the front of
the control center in the RUN (■) position so that
the Control Center will accept a Remote Start/Stop
Command. When Turbine Start Mode is set for Manual
on Configuration Screen 1, the Remote start command
will only cause the chiller startup to progress as far as
the "BEgIN SLOW ROLL" message.
"Compr Standby lube in process"
If Standby Lube is enabled on the Oil Sump Screen,
this message appears for 2 minutes every 24 hours if
the chiller has not been running in the past 24 hours.
A countdown timer is also displayed showing the time
remaining in the lube cycle.

CYCling ShuTdoWn MeSSageS

"Control panel – power failure"
A Control Power failure has occurred. If the power
failure occurred while the chiller was running, it may
automatically restart when power is restored.
message can indicate a Cycling (auto-restart after power
FORM 160.67-O1
ISSUE DATE: 4/1/2015
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JOHNSON CONTROLS