Underhill ICC Decoder Module Troubleshooting Guide
8
Observed Field Condition
2) “Some of the stations connected to the Underhill ICC Decoder module will not
irrigate either manually or from a programmed start time”.
Possible Causes
a)
There is a break in the 2Wire path between some stations,
b)
Some decoders are not programmed or are programmed incorrectly or do not
match the corresponding valve they’ve been wired to.
How to Troubleshoot
1)
In this example station 08 will operate but station 10, which is “downstream in
terms of the 2Wire path” won’t turn on. .
a.
Is the ICC decoder module located in the upper right-‐hand position of
the ICC or in another location?
b.
If only the ICC decoder module exists, then go to “c”. If a Hunter station
module is in place, then know the ICC Decoder module station count
begins with the next station number
c.
If you remove decoder for station 10 and move it to station 08 can this
station be operated in Manual mode? If yes, then there is most likely a
break in the 2Wire path between the two stations.
d.
If “No”, then re-‐program the decoder and retry at station 08’s location
first. If it operates then move it to station 10’s location and try again. If
it does not operate, there is a break in the 2Wire com path and a you’ll
need a digital Clamp Meter Underhill p/n TW-‐DCM to determine where
the break has occurred.
Observed Field Condition
3) “The Hunter ICC is only capable of managing 32 stations with Hunter station
modules. How can it manage up to 48 stations with an Underhill ICC Decoder
Module”?
The Hunter utilizes the same PCB to for both plastic wall mount enclosures managing
32 stations as it does for metal enclosures managing 48 stations. When the Underhill
ICC Decoder Module is installed, it allows your plastic enclosure Hunter ICC to manage
up to 48 stations.
Possible Reasons
Sometimes the Hunter ICC controller and the ICC decoder module don’t synchronize
the decoder module does not recognize more than 32 stations.
How to Troubleshoot
Turn the menu knob to “Manual Single Station”. Press and hold the left arrow button.
The display should show 48. If it doesn’t, then remove the 9-‐volt battery, disconnect the
Hunter ICC power module or unplug 120 volt power to the controller and remove the
ICC Decoder module. Re-‐insert the Hunter power module, or reconnect to a 120-‐volt
power source, then re-‐install the ICC Decoder module. Turn the menu knob to “Manual
Single Station”, press and hold the left arrow button to confirm 48 stations.
