Ecoer ECT01 - Page 10

ECT Install and User Guide
Feb 2023
9 of 61
ECOER INC.
Manufacturer reserves the right to change specifications or designs without notice.
HA HB
Indoor Unit
Wired Controller
Fig.3-7
For some units, the wired controller connects to the unit HA and HB
ports through the HA and HB ports. There is no polarity between HA
and HB. See Fig. 3-7