Gree GMV-N07G/A3A-D(U), Service Manual

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Multi Variable Air Conditioners Indoor Unit for North America
54
NOTICE!
In pa
rameter query status, "FAN", ―TIMER‖, "SLEEP", and "SWING" are invalid. By pressing the
―ON/OFF‖ button, users can return to the main interface but not power on/off the unit.
In parameter query status, signals of the remote controller are invalid.
4.1.7 Engineering Parameter Settings
Engineering parameters can be set in power-on or power-off status.
(1)
Press and hold the ―FUNCTION‖ button for five seconds. The temperature area displays ―C00‖.
Continuously press the ―MODE‖ button for three times, and then press and hold the ―FUNCTION‖ button
for five seconds to enter the engineering parameter setting interface. The temperature area displays
―P00‖.
(2)
Select a parameter code by pressing ― ‖ or ― ‖. Press the ―MODE‖ button to switch to
parameter value settings. The
parameter value blinks. Adjust the parameter value by pressing ― ‖ or ― ‖
and then press the ―ENTER/CANCEL‖ button to complete settings.
(3)
Press the ―ENTER/CANCEL‖ button to return to the upper-level menu till quitting parameter
settings.
In the engineering parameter setting interface, users can also set user parameters listed in Table
4.4.
The engineering parameter setting list is as follows:
Table 4.4 Engineering Parameter Setting List
Parameter
Code
Parameter Name Parameter Range Default Value Remark
P15
Power-down
memory mode
00: standby after
power-down recovery
01: restoring the original
status after power-down
recovery
00
P17
Historical fault
clearing for IDU
00: not cleared
01: cleared
00
Historical faults of all IDUs
controlled by the current wired
controller are cleared.
P20
Environment
temperature
sensor settings for
IDU
01: temperature sensor
of air return vent
02: temperature sensor
of wired controller
03: temperature sensor
of air return vent for
cooling, dehumidifying,
and air supply;
temperature sensor of
wired controller for
heating
04: temperature sensor
of wired controller for
cooling, dehumidifying,
and air supply;
temperature sensor of
air return vent for
heating
03
When there are master and slave
wired controllers and the
temperature sensor of wired
controller is used, only the
temperature sensor of the master
wired controller is used by default.
NOTICE!
1. In automatic mode, the
environment temperature sensor
settings are invalid for a common
IDU but the setting value is
memorized.
2. The environment temperature
sensor settings are invalid for a
fresh-air IDU. The temperature
sensor of air return vent is used by
default.
P21
Corrected value of
environment
temperature
sensor of IDU (for
cooling,
dehumidifying,
and air supply)
-15 to +15
Temperature
sensor of unit:
0°C;
temperature
sensor of
wired
controller: 0°C
Press ― ‖ or ― ‖ to add or reduce
by 1°C.