Gree GRS-S16/Na-M, Service Manual

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HEAT PUMP WATER HEATER (NORTHERN EUROPE) INSTALLATION
16
Caution:
The communication distance between the main board and the wire controller can be as far as 20m
(The standard distance is 8m).The wire controller shall not be installed in a place where there is water
drop or large amount of water vapor.
4 CONTROL WIRING DESIGN
WIRED CONTROLLER
Manual Unit Controller
Outdoor Unit Controller
CN1
CN2
J1 X17
twisted-pair
twisted-pair
The controllers of the unit include manual controller, wired controller and outdoor unit controller.
The wired controller communications with manual controller and outdoor unit controller in RS485.
The wired controller connects manual controller with 4-line twisted-pair. Similarly, wired controller
connects outdoor unit controller with 4-line twisted-pair.