Johnson Controls YORK OPTIVIEW CONTROL CENTER, Руководство по эксплуатации

Страница: 115 / 142

JOHNSON CONTROLS
115
SECTION 3 - OPTIVIEW DISPLAY MESSAGES
FORM 160.10-O1
ISSUE DATE: 4/27/2018
3
down. The chiller can be restarted after the winding
temperature has decreased below the winding cutout
setpoint.
Motor – High Bearing Temperature
This message indicates that a motor bearing has ex-
ceeded the programmed bearing cutout temperature,
initiating a chiller shutdown. The chiller can be restart-
ed after the bearing temperature has decreased below
the bearing cutout setpoint.
MOD “B” SOLID STATE STARTER
SAFETY SHUTDOWN MESSAGES
The following safety shutdown messages are displayed
for liquid cooled solid state starter (LCSSS) applica-
tions only. These messages are generated by events
that occur within the LCSSS. The chiller can be started
after the problem has been corrected and a manual re-
set of the compressor motor switch occurs. Service and
troubleshooting information is contained in the Solid
State Starter MOD “B” – Operation/Service Manual
(Form 160.00-O2).
LCSSS Shutdown – Requesting Fault Data...
The liquid cooled solid state starter logic/trigger board has
shut down the chiller but the control center has not yet
received the cause of the fault from the LCSSS. The LC-
SSS shuts down the chiller by opening the motor control-
ler LCSSS stop contacts (K1 relay located on the logic/
trigger board and connected between TB6-16 and TB6-53
in the control center). The control center microboard then
sends a request for the cause of the fault to the logic/trig-
ger board over the serial communications link. Since se-
rial communications are initiated every two seconds, this
message is typically displayed for a few seconds and then
replaced with one of the following fault messages.
LCSSS – 105% Motor Current Overload
The highest phase of the compressor motor current
is above 105% of the programmed 100% chiller Full
Load Amps (FLA) continuously for forty (40) seconds.
LCSSS – High Instantaneous Current
This message indicates the solid state starter logic/trig-
ger board detected that the compressor motor current in
any phase exceeded 1.1 (1.414 x RMS value of the pro-
grammed Start Current) for a minimum of one second.
LCSSS – High Phase X Heatsink
Temperature – Running
The solid state starter logic/trigger board has detected
the temperature of current phase A, B or C (designated
as X above) Silicon Controlled Rectifier (SCR) mod-
ules exceeded 212°F while the chiller was running. The
fault can be cleared after all SCR temperatures are low-
er than 210°F and the compressor switch is placed in
the STOP/RESET (O) position. However, the chiller
cannot be started until all SCR temperatures are lower
than 109°F. During the shutdown, the starter cooling
pump runs until the temperature is below 109°F.
LCSSS – Phase (X) Shorted SCR
A shorted Silicon Controlled Rectifier (SCR) in phase
A, B or C (designated as X in the message) has been
detected by the solid state starter logic/trigger board.
The voltage across each SCR in monitored to detect
the shorted condition. The shorted condition must exist
continuously for five (5) seconds in order for the Op-
tiView Control Center to trigger and display the fault.
This check is disabled while the chiller is running.
LCSSS – Open SCR
An open Silicon Controlled Rectifier (SCR) has been
detected by the solid state starter logic/trigger board.
The open condition must exist continuously for five (5)
seconds in order for the control center to trigger and
display the fault. The chiller can be started after the
condition has been corrected. In certain applications,
local power line conditions could interfere with the
open SCR detection technique. This requires a quali-
fied service technician to disable this check. Refer to
the Solid State Starter MOD “B” – Operation/Service
Manual (Form 160.00-O2).
LCSSS – Phase Rotation
The solid state starter logic/trigger board has detected
the three phase compressor motor power line voltage
phase rotation is not correct. The chiller can be started
after the phase rotation is correct.
VSD SAFETY SHUTDOWN MESSAGES
The following safety shutdown messages are displayed
on compressor motor Variable Speed Drive (VSD)
applications only. These messages are generated by
events that occur within the VSD. The chiller can be
started after the problem has been corrected and a
manual reset of the compressor motor switch and VSD
logic board reset occurs. Service and troubleshooting
information is contained in the Variable Speed Drive –
Service Manual (Form 160.00-M1).