Chore-Time Chore-Tronics 3 Control, Installation & Operator'S Instruction Manual, Page: 122 / 142

Troubleshooting Chore-Tronics® 3 Control
122
MT2398C
IONet Error Addr:xx
This is a communication failure between the Main box and 1 or more of the Manual Switch Boards
(iMSCM). The number following the address indicates which board is having the communications issues.
These trouble shooting steps assume that the I/O Net alarm occurred on a previously functioning control
and no boards have been replaced. Do the following steps:
1. Clear the alarm. See if it reappears in approx. 30 seconds. Check to make sure the same board address
appears. If the same address appears go to Step 2. If the I/O Net alarm does not appear at all or the
alarm does occur, but at a different address go to Step 3.
2. Open the door to the Relay Box and remove the protective cover plate. Caution : Line voltage will be
present! Check the light in the center of the switch board where the I/O Net alarm occurred to see if
it is flashing (normal operation). If the light is flashing go back to Step 1. If the light is not flashing
go to Step 4.
3. Power off the Control. Check the polarity of the twisted pair that is connected to the I/O Net terminals
in both the main box and the relay box Caution : Line voltage will be present! Also, check the
polarity of the 24 Vdc Twisted Pair in both the Main Box and the Relay Box. Correct if necessary. If
the I/O Net alarm is still occurring go to Step 4.
4. Check to make sure that the #1 DIP switch on the IO Board of the Main Box is set to the ON position
for 32 and 40 output Controls or to the OFF position for 56 outputs Controls. For all Controls, check
that the jumper in the upper right hand corner of the Switch Board closest to the bottom is set to the
ON position. Correct if necessary. If the I/O Net alarm is still occurring go to Step 5.
5. Check the routing of the Twisted Pair wire for both the I/O Net and the 24 Vdc. Make sure that
Twisted Pair wire is used, the wires are run separately from line voltage wires, and that when the pair
does cross line voltage wires it is at a 90 degree angle. Correct if necessary. If the I/O Net alarm is
still occurring go to Step 5.
6. Check the grounding of the Control. There should be one ground wire connected from Earth ground to
the Ground Rail of the Main Box of the Control. There then should be a ground wire connecting the
ground rail of the Main Box to the Ground Rail of the Relay Box. Correct if necessary. If the I/O Net
alarm is still occurring go to Step 6.
7. Remove power from the Control. Open the Relay Box and remove the protective cover plate. Check
all the terminals of all boards that have had an I/O Net alarm occur. Make sure that all wires from the
wiring harness are securely in the correct terminal position and that the screws are tight. Correct if
necessary. If I/O Net alarm is still occurring go to Step 8.
8. Replace the Switch Board.