Connection Between Controller And Unit - Gree DC Inverter Multi VRF Service Manual

DC INVERTER MULTI VRF
14 Melt
15 Lock
16 Set
17 (set temp.)
18 HR (hour)
19 .5
Setting temp. and timer
20
time
Note:
1. Contents in the double quotation marks indicate the display in LCD. Following part is the same to it.
2. Online indoor units to Mini Centralized Controller indicate that in a region. Following part is the same to it.
3. No signal control function for region wired controller, and "SINGLE" won't be displayed either.

5.4 Connection between Controller and Unit

Insert the 4-core twisted pair line to wired controller, if which is with the indoor unit, into region controller wiring
terminal CN1 (or CN2), and then connect the other wiring terminal CN2 (or CN1) with the main board of indoor unit.
If there is no wired controller with indoor unit, introduce a 4-core twisted pair line to indoor unit main board and connect it
with region controller wiring terminal CN1 (or CN2).
Note Any main board of the indoor unit controlled by the region controller can be connected. If the region controller is used
as a region wired controller, wired controller with the indoor unit must be removed.
Before installation and connection, make sure the power supply is off.
connection, check the connection result again to prevent loose or short.
There are 4 connection lines (included in the 4-core twisted pair line) to the controller, from CN1 or the
upper and right CN2 to the upper they respectively are: Ground line (GND), communication line A (A),
communication line B(B) and power cord (+12 v).
Note:
During following connection of wirings, pay special attention to them to avoid malfunction to units for
"Melt" is displayed during defrosting.
Region monitoring controller
A: Inquiry state: "LOCK" is displayed when selected indoor unit is locked.
B: Control state: "LOCK" is displayed during setting or giving the lock order.
Region wired controller: "LOCK" is displayed when selected unit is locked in
long-distance monitoring.
"SET" blinks when the unit is on and commanded.
"SET" is displayed when the unit is on without command.
Set temp. value is displayed when the selected indoor unit is on and not in timer
inquiry or setting status.
"HR" is displayed during timer inquiry or setting.
".5" is displayed when the timer time value includes 0.5 hr and the unit is during
timer inquiry or setting.
During timer inquiry, integer of setting time of timer is displayed.
During timer setting, integer of setting time of timer is displayed.
Set temp. value is displayed when the unit is not during timer inquiry or setting.
Fig2.1 Power cords and communication lines for region controller
CONTROL
After installation and
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