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