Control Wiring Design - Gree T1/R22 Service Manual

MINI CHILLER

4 CONTROL WIRING DESIGN

The controllers of the split type unit include manual controller, indoor unit controller and outdoor
unit controller. The indoor unit controller communications with manual controller and outdoor unit
controller in RS485. The indoor unit controller connects manual controller with 4-line twisted-pair.
Similarly, the indoor unit controller connects outdoor unit controller with 4-line twisted-pair.
Indoor Unit Controller
The controllers of the Integral type unit include manual controller and outdoor unit controller. The
manual controller communications with outdoor unit controller in RS485. The manual controller
connects outdoor unit controller with 4-line twisted-pair.
19
Indoor Unit Controller
CN1
twisted-pair
J1
Manual Unit Controller
Manual Unit Controller
Outdoor Unit Controller
CN2
twisted-pair
X17
Outdoor Unit Controller
J1
twisted-pair
X17
CONTROL