Johnson Controls YORK YK Style G OPTIVIEW, Эксплуатация и обслуживание, Страница: 226 / 306

FORM 160.54-O1
ISSUE DATE: 9/10/2014
JOHNSON CONTROLS
186
SECTION 3 - DISPLAY MESSAGES
LCSSS – Phase Rotation/Loss
(Flash Memory Card version C.MLM.01.03 or earlier)
The Liquid Cooled Solid Starter Logic/Trigger Board
has detected the three-phase compressor motor power
line voltage phase rotation is not correct or the line-
to-line voltage in any phase has decreased to less than
30% of nominal. The chiller will automatically restart
when the power line conditions are acceptable.
LCSSS – Phase Loss
(Flash Memory Card version C.MLM.01.04 or later)
The Liquid Cooled Solid State Starter Logic/Trigger
Board has detected the line-to-line RMS voltage in any
phase has decreased to less than or equal to 30% of the
lowest value of the programed voltage range. If the pro-
grammed voltage range is Disabled, a value of 60VAC
is used as the threshold. The chiller will automatically
restart when the line voltage is greater than the shut-
down threshold. The voltage range is programmed by a
Service Technician following instructions in OptiView
Control Center – Service Instructions (Form 160.54-
M1) .
COMPRESSOR MOTOR VARIABLE SPEED
DRIVE: CYCLING SHUTDOWN MESSAGES
The following cycling shutdown messages are dis-
played on Compressor Motor Variable Speed Drive
(VSD) applications only. These messages are gener-
ated by events that occur within the VSD. The chiller
will automatically restart when the cycling condition
clears. Service and troubleshooting information is con-
tained in Variable Speed Drive – Service Instructions
(Form 160.00-M1)
.
VSD Shutdown – Requesting Fault Data
The VSD has shutdown the chiller and the Control
Center has not yet received the cause of the fault from
the VSD, via the serial communications link. The VSD
shuts down the chiller by opening the Motor Controller
VSD STOP CONTACTS (located on the VSD Logic
Board and connected between TB6-16 and TB6-53 in
the Control Center). The Microboard in the Control
Center then sends a request for the cause of the fault to
the VSD Logic Board via the Adaptive Capacity Con-
trol Board, over the serial link. Since serial communi-
cations are initiated every 2 seconds, this message is
typically displayed for a few seconds and then replaced
with one of the below listed fault messages.
VSD – Stop Contacts Open
Refer to
VSD Shutdown – Requesting Fault Data on
Page 186 . If the Control Center’s Microboard does
not receive the cause of the fault over the Serial Link
within 20 seconds, it is assumed it is not forthcoming
and that message is replaced with VSD – STOP CON-
TACTS OPEN message.
VSD Initialization Failed
Upon application of power, all boards go through the
initialization process. At this time, memory locations are
cleared, program jumper positions are checked and seri-
al communications links are established. There are sev-
eral causes for an unsuccessful initialization as follows:
• The Control Center and the VSD must be ener-
gized at the same time. The practice of pulling
the fuse in the Control Center to remove power
from the Control Center will create a problem.
Power-up must be accomplished by closing the
main disconnect on the VSD cabinet with all fuses
in place. A power interruption to the VSD Logic
Board will also generate this message.
• The eproms must be of the correct version for each
VSD board and they must be installed correctly.
The eproms are created as a set, and cannot be in-
terchanged between earlier and later versions.
• Serial data communications must be established.
Refer to
VSD – Serial Communications on Page
189
. If communications between the VSD Logic
Board, Harmonic Filter Logic Board, ACC Board
and Control Center Microboard does not take
place during initialization, this message will be
generated. The serial communications can be ver-
ified by selecting the VSD DETAILS Screen from
the MOTOR Screen and observing the Full Load
Amps value. A zero displayed for this and other
VSD parameters, indicates a serial communica-
tions link problem.
• If the Harmonic Filter option is included, make
sure the Filter Logic Board is not in continuous
reset. This condition is evidenced by the Filter
Logic Board’s LED’s alternately blinking. The
filter can be eliminated as a cause of initializa -
tion failure by disconnecting the filter by placing
switch SW1 on the Filter Logic Board in the OFF
position and removing the ribbon cable between
the Filter Logic Board and the VSD Logic Boards.
• VSD and Harmonic Filter horsepower ratings do
not agree.