Johnson Controls YORK OM Titan, Руководство по эксплуатации

Страница: 114 / 138

FORM 160.72-O1 (810)
JOHNSON CONTROLS
114
SECTION 3 - OPTIVIEW CONTROL CENTER
ducer failure. This message will be displayed until the
condition clears and the
WARNING RESET
Keypad
key is pressed on the home screen in OPERATOR (or
higher) access mode. Condition not checked in Brine
mode.
Warning - seTpoinT override
A blank BRAM battery-backed memory device (IC lo-
cation U52 on Microboard) or a failure of this device
was detected during the initialization process that oc-
curs when power is applied to the OptiView Control
Center. Due to this failure, any or all of the programmed
Setpoints could have been corrupted. Therefore, all
Setpoints have been automatically changed to their
De-
fault values. All Setpoints will have to be programmed
to their desired values. This message will clear when
the WARNING RESET key is pressed on the home
screen in OPERATOR (or higher) access mode.
Warning - Condenser - high pressure
liMiT
The Condenser Pressure exceeds the High Pressure
Warning Setpoint threshold, programmed by a Service
Technician logged in at SERVICE access level. While
this condition is in effect, the Pre-rotation Vanes are in-
hibited from further opening. This message automati-
cally clears and the Vanes are permitted to modulate
open when the Condenser pressure decreases to 0.1
PSIA below the Setpoint.
Warning - evaporaTor - loW pressure
liMiT
The evaporator pressure has decreased to the warning
threshold. This threshold is fixed in water cooling ap-
plications. In Brine cooling applications, the threshold
is a fixed amount above the programmable safety shut-
down threshold. The safety threshold in Brine applica-
tions is determined by the Brine solution and is deter-
mined by the YORK Factory. While this condition is in
effect, the Pre-rotation Vanes are inhibited from further
opening. This message automatically clears and the
vanes are permitted to modulate open when the evapo-
rator pressure increases to the reset value.
Warning - exTernal i/o-serial CoMMu-
niCaTions
Serial communications between the Microboard and
one of the Analog I/O Boards or the Digital I/O Board
has been interrupted for at least 20 seconds. Message
automatically clears when communications are re-
stored.
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
BAS remote mode via the E-Link gateway serial com-
munications.
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 CoMpressor sWiTCh in run
posiTion
The OptiView Control Center is in either Digital or
1SN (Integrated Systems Network) Remote mode. The
Operator is requested to place the
COMPRESSOR
Switch in the
RUN
position. The OptiView Control
Center will not accept a Remote start/stop command
unless the switch is in the RUN position.
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.
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.
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
restart when the conditions have been satisfied.
The chiller has been shut down for <30 minutes and the
oil temperature minus the condenser saturation temper-
ature is <30°F.
-OR
The chiller has been shut down for > 30 minutes and
the oil temperature minus the condenser saturation
temperature is < 40°F.
-OR