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CHECKLIST BEFORE INSTALLATION INQUIRIES
44
Trouble Shooting Guide
Major Function
LG ACCS GUI is not
operational.
In LG ACCS, ventila-
tion device becomes
network error state
(CH 242).
CH 242 (network
error) keeps appear-
ing and disappearing
in the internet bridge
controller.
16 rooms central
controller and inter-
net bridge interfaced
and installed, but
some indoor units
are not recognized or
central control com-
mands are not well
performed.
Possible causes
• Are several programs running in
the computer?
• Is RS-485 cable correctly connect-
ed?
• Is there remote controller commu-
nication defect?
• Is PI485 DIP switch setting cor-
rect?
• Is central control indoor unit
address set?
• Are all RS-485 communication
lines connected to each other?
• Is there any overlapping indoor
unit address setting?
• Is the simple central controller DIP
switch setting correct?
• Are the simple central controller
and the controlled indoor unit
physically connected on the same
line?
Corrective action
• Close Explorer window and run a
new explorer to access again.
• In the process manager, end all
iexplore.exe processes and
access the internet bridge again.
• Connect RS-485 cable to BUS-A
and BUS-B.
• Solve the remote controller com-
munication defect problem.
• Refer to PI485 manual for DIP
switch setting.
• Set the indoor unit address.
• Remove the interconnecting com-
munication lines outside the com-
munication lines connecting to the
internet bridge.
• Assign unique address to each
indoor unit so that there is no
indoor unit with overlapped
address.
• Set all central controllers (16
rooms central controller) to Slave
mode, and reset the power.
• Modify the connections so that
the simple central controller is
surely on the same RS-485 com-
munication line with the controlled
indoor unit.
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