Troubleshooting Arc156 Communication; Johnson N2; To Set Up The Unit Vent For N2 - United Technologies Carrier Unit Vent Open Integration Manual

Troubleshooting ARC156 communication

The most common communication problems result from not properly following the configuration steps outlined
above in this manual. Review all of the steps and use the following list to check your settings.
Verify accuracy of the following:

Protocol DIP switches 3 and 4

Proper connection wiring

Unique rotary address switches 1 – 99. If controllers have duplicate addresses, network communication can
be lost.

Unique BACnet Device Instance numbers. Default is 16101XX, with the rotary address switches defining XX. If
controllers have duplicate device instance numbers, network communication can be lost.
NOTES

The controller recognizes physical changes (DIP switches, rotary switches, and jumpers) upon power up.

If RX LED is solid, then the terminations are incorrect.

If the network has greater than 32 devices or exceeds 2,000 feet, a Repeater should be installed.

If a controller begins or ends a network segment, a terminating resistor may be needed.
Software settings defined through the Equipment Touch device. To confirm settings, obtain a Modstat of the
device. On the Equipment Touch, click the link to the Modstat.

Johnson N2

To set up the Unit Vent for N2

Turn off the power for the Unit Vent by disconnecting power terminals.
1
Using the rotary switches, set a unique address. Set the Tens (10's) switch to the tens digit of the address,
2
and set the Ones (1's) switch to the ones digit.
EXAMPLE If the controller's address is 25, point the arrow on the Tens (10's) switch to 2 and the arrow on
the Ones (1's) switch to 5.
0
10's
0
1's
Unit Ventilator
Integration Guide
9
Communications wiring
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