Assigning Unit Numbers In The Easy-Link System - A.O. Smith T-H2-DV Service Manual

12-6. Assigning unit numbers in the Easy-link system

A.
How to display the unit number
Press the "Number display" button on the computer board. The 3-digit 7-seg LED will then display
the assigned number for that T-H2-DV or T-H2-OS unit for 10 sec.
NOTE: In a single-unit installation, the numbering system is disabled.
B. How to reset and reconfigure the numbering of units
Unit #'s can be reset and reassigned manually:
1. Press and hold the "Number display" button on the computer board of all child units for at least 5
seconds.
2. The 3-digit 7-seg LED on the computer board of all child units will display "0" to signify that the
computer memory has been erased of its previously assigned unit #.
3. Press and hold "Number display" button again. New unit # will be assigned in order as you
proceed through every unit.
"Number display" button
Each T-H2-DV or T-H2-OS in an Easy-link system is assigned a random unit #,
except for the Parent unit, which is always assigned as unit #1.
When more than four units of the T-H2-DV or T-H2-OS are connected in an
Easy-link system, only the first four units will work as a system. The
remaining units will not operate
520 models Computer board
T-H2-DV/T-H2-OS Service Manual
3-digit 7-seg LED
68
CONFIDENTIAL
Ver. 1.01