York YK-EP B Operation & Maintenance Manual page 166

SECTION 3 - DISPLAY MESSAGES
Warning – Motor – High Bearing Temperature
This warning occurs when either of the enabled mo-
tor bearing temperatures exceeds the programmed
High Bearing Temperature Warning for 3 continuous
seconds. This warning will automatically clear when
all bearing temperatures decrease below the warning
threshold. The value programmed for this threshold is
displayed as High Bearing Temperature Warning on
the MOTOR SETPOINTS Screen. It is programmed
with the Bearing Setup Setpoint on that screen. This
warning not occur when the Bearing Temperature Pro-
tection Setpoint is set to Disabled on the MOTOR DE-
TAILS Screen. Also, it will not act on any RTD input
registering as an open RTD.
Warning – Motor – Bearing Vibration Baseline
Not Set
Displayed until both the Shaft End and Opposite Shaft
End motor bearing vibration baseline values are entered
on the MOTOR DETAILS Screen. This can be done
either manually with the Manual Baseline Setpoint or
automatically with the AUTO BASELINE key on that
screen. While this message is displayed, the vibration
baseline values are set to X.X.
Warning – Motor – High Bearing Vibration
Either the Shaft End or Opposite Shaft End motor bear-
ing vibration has exceeded the value programmed for the
High Vibration Warning Setpoint for the programmed
number of Delay seconds. The warning will automati-
cally clear when both vibration values decrease below the
warning threshold. This warning does not occur when the
Motor Vibration Protection Setpoint is set to Disabled on
the MOTOR DETAILS Screen or while the WARNING
– MOTOR – BEARING VIBRATION BASELINE NOT
SET warning is displayed.
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 (BAS) Remote mode via the SC-EQ commu-
nication card serial communications. If the chiller is
running when this occurs, the Pre-Rotation Vanes are
driven fully closed prior to shutting down the chiller.
Local Stop
A local shutdown command has been received by
pressing the Soft Stop Key on the Home screen.
166
Place Compressor Switch In Run Position
The Control Center is in either Digital or ISN (BAS)
Remote mode. The Operator is requested to press the
Start Key on the Home Screen. As a safety measure
the Control Center will not accept a Remote start/stop
command unless the Start key is initially pressed.
CYCLING SHUTDOWN MESSAGES
Multiunit Cycling – Contacts Open
The Multiunit Cycling contacts connected to I/O Board
TB4-9, have opened to initiate a cycling shutdown.
If the chiller is running when this occurs, the Pre-
Rotation Vanes are driven fully closed prior to shutting
down the chiller. The chiller will automatically restart
when the contacts close.
System Cycling – Contacts Open
The System Cycling contacts connected to I/O Board
TB4-13, have opened to initiate a cycling shutdown.
If the chiller is running when this occurs, the Pre-
Rotation Vanes are driven fully closed prior to shutting
down the chiller. The chiller will automatically restart
when the contacts close.
Oil – Low Temperature Differential
The chiller is prevented from starting because for one of
the following reasons. The chiller will automatically re-
start when the conditions have been satisfied. This condi-
tion is only checked while the chiller is stopped. In pre-
vious software versions, it is checked when stopped and
during the first 10 seconds of prelube.
The chiller has been shut down for less than or equal
to 30 minutes and the oil temperature minus the con-
denser saturation temperature is less than 30°F.
-OR-
The chiller has been shut down for greater than 30 min-
utes and the oil temperature minus the condenser satu-
ration temperature is less than 40°F.
-OR-
Following a power failure, upon restoration of power,
the oil temperature minus the condenser saturation
temperature is less than 40°F.
Oil – Low Temperature
The oil temperature has decreased to less than 55°F.
The chiller will automatically restart when the tem-
perature increases to greater than 55.0°F and is greater
FORM 160.87-OM1
ISSUE DATE: 8/24/2018
JOHNSON CONTROLS