Underhill ICC Decoder Module Troubleshooting Guide
7
3) Is the 2Wire Communication cable connected to “L1 / L2” terminals on the ICC
Decoder module making good contact? Remove and remake these wire
connections. If a station cannot be operated refer to #1 troubleshooting
portion of this paragraph.
4)
Program one or more of the decoders following the installation instructions on
page 13 of the User Manual. Then install in the field with the corresponding
station number. Once operation is confirmed, be sure and complete the wire
connection using the included 3M DBRY connectors for a waterproof wire
connection.
5)
If after all of these tasks the “error” LED on the decoder module continues to
remain “on”, then use a multi-‐meter and measure the AC voltages on the
downstream side of the transformer where the wires terminate into Hunter ICC
“power module” see Troubleshooting #18 for a diagram of how this can be
accomplished. Verify if the same voltage can be measured on the L1/L2
terminals of the ICC module when a station is operated manually or from a
program start. The there is a wide disparity in measured voltage, then the
power module might require replacement.
Additional ground
wire when ICC
Decoder module is
not in the upper left
position