T-H2-DV/T-H2-OS Service Manual
Ver. 1.01
75
CONFIDENTIAL
12-11. Individual unit operation in easy-link system while parent unit is under
abnormal conditions (Individual operation mode)
In an easy-link system, if a parent unit undergoes abnormal conditions, the T-H2-DV/T-H2-OS can
operate as individual units. If this happens, the minimum flow rate of the system changes from 0.5
GPM to 0.5 GPM multiplied by the number of T-H2-DV/T-H2-OS. Refer to the following example:
Ex: Minimum flow rate of a four unit easy-link system.
Under normal conditions: 0.5GPM
When the parent unit fails: 0.5×4=2.0GPM
Minimum flow rate of the easy-link system depends on the number of the units installed in the
easy-link system.
The set temperature of each unit individual is the set temperature before the failed communication
happened between child unit and parent unit.
T-H2-DV/T-H2-OS will not work individually during with a failed parent unit if the “Individual
operation mode” is disabled. See section12-5 “Individual operation mode” in Dipswitch settings of
the computer board.
In order to make operation system effective during an abnormal condition, the number of individual
unit should be half of the total number of T-H2-DV/T-H2-OS installed in the easy-link system.