Trane RTHD Troubleshooting Manual page 13

Chiller has multiple loss of
communication diagnostics.
Using TechView go into binding
view. Are there devices that are
not verified?
YES
Check for 24 VAC at J2-1 and
J2-2 on the power supply.
Check for 24 VDC at J1, J3, J4,
and J11 between pins 1 and 2.
Is the voltage within 22.8 to 25.2
VDC?
YES
Try to bind the
device(s). Did they
bind?
NO
Can you turn all the
LEDs on with a
south pole magnet?
YES
Does the light stay
on when the magnet
is removed?
YES
RLC-SVB05A-EN
IPC Overview and Troubleshooting
NO
NO
YES
NO
NO
Reset diagnostics
Refer to Section 3-
Power supply
checkout .
Reset diagnostics
There is no Power
at the LLID.
Replace LLID
Problem could be with the LLID
bus, a connector or the LLID. If
only one LLID is not functioning
suspect the LLID or the
connector. If problem is with
multiple LLID suspect a problem
with the LLID bus or a connector
13