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Underhill   ICC   Decoder   Module   Troubleshooting   Guide   

6   

   

   

   

   
   
   

   
   

   
   
   

   
If   the   Decoder   Module   does   not   operate   after   attempting   both   steps   (a)   and   (b),   
then   the   Decoder   Module   is   damaged   and   should   be   replaced.      The   Underhill   

p/n   is   TW-­‐IC-­‐48   and   can   be   ordered   on-­‐line   or   through   your   preferred   local   
distributor.         

   

2)

 

Is   a   #8   or   #10   bare   copper   wire   terminated   in   the   “Ground”   terminal   to   a   
ground   rod   or   ground   plate   if   only   the   ICC   Decoder   Module   is   installed?         

   

   

   

   
If   the   ICC   controller   is   being   used   with   both   a   Hunter   station   module(s)   and   an   

ICC   Decoder   module   is   a   ground   wire   connected   to   both   a   ground   rod   or   ground   
plate   and   to   the   “GND”   connector   on   the   Hunter   module   directly   about   the   ICC   
controller   transformer?   

   
   
   

   
   

   
   

Ground   wire   
to   ground   rod   
or   ground   

plate   

Brass   tab   

Summary of Contents for ICC 2 Wire

Page 1: ...rate station 08 from the 2Wire Decoder 9 5 The Hunter ICC is using 11 stations with two station modules and this installation also has an Underhill 2Wire module in the third space I cannot operate sta...

Page 2: ...m the Hunter ICC controller I need to add a new station which I connected to the wire path for the master valve with a decoder but the station does not operate I can hear the solenoids buzzing but nei...

Page 3: ...erly and operating a Locate press and hold the Reset button on the ICC Decoder Module as shown for approximately 10 seconds The Green Accept LED should blink on and off for approximately 15 20 seconds...

Page 4: ...r If the station does not operate remove a decoder from a valve box assuming it has already been programmed and connect the red and black decoder wires into the L1 L2 terminals on the ICC Decoder modu...

Page 5: ...y be displayed as 100 Ohms or higher Replace the solenoid if needed e If after attempting steps 3 4 without success remove AC power and the 9 volt back up battery if it exists from the ICC controller...

Page 6: ...d local distributor 2 Is a 8 or 10 bare copper wire terminated in the Ground terminal to a ground rod or ground plate if only the ICC Decoder Module is installed If the ICC controller is being used wi...

Page 7: ...ire 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 an...

Page 8: ...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 oc...

Page 9: ...en programed from 12 16 and re program to stations higher than the last station using station decoders Confirm their operation by operating in MANUAL mode once re installed Observed Field Condition 6...

Page 10: ...ble Causes The Hunter ICC controller and the Underhill ICC decoder module are not synchronized or something has occurred to the programming function in the ICC decoder module How to Troubleshoot 1 Tur...

Page 11: ...ted to a Roam or Roam XL hand held receiver or Solar Sync How to Troubleshoot Verify if a blue colored capacitor has been installed on the Hunter ICC s power module Generally if this capacitor is miss...

Page 12: ...wires of the decoder into either one of these connections Attach the two yellow wires of the decoder to a known working solenoid Attempt to operate the corresponding station number manually from the H...

Page 13: ...id before moving to the next troubleshooting task 3 Disconnect the decoder and use a known working solenoid typically a spare service part Temporarily disconnect the 2Wire path from the ICC decoder mo...

Page 14: ...you see the green LED flash see figure below Then turn the main menu knob on the Hunter ICC to the RUN position and observe the green LED flashing again Press and hold the Reset Button on the ICC Dec...

Page 15: ...ire reprogramming Observed Field Condition 14 I m new to this site and there are no As built drawings denoting the valve locations I can t locate or irrigate some stations Will a cable detector I use...

Page 16: ...erify the decoder has been programmed to the appropriate station number and retry If the valve operates as well as the master valve then trench and bury the temporary 2Wire path Observed Field Conditi...

Page 17: ...ne of more has a defective decoder and or solenoid Remember as a solenoid reaches end of life it has more resistance drawing excessive current How To Troubleshoot Damaged decoders typically take a low...

Page 18: ...module Using the clamp meter and clamp around one of the conductors on the 2Wire path then operate station 01 manually from the ICC controller Write down the mA value displayed on the clamp meter and...

Page 19: ...d from the L1 L2 terminals and connected directly to the 24 volt terminal block of the Hunter ICC power module This is done with the 120 volt power to the ICC controller Off Stations will not operate...

Page 20: ...he field Temporarily disconnect station 07 decoder and re attach the 2Wire path essentially bypassing station 07 2 Operate station 08 and others and confirm they operate individually If they do then r...

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