Gree GMV-ND07PLS/A-T(U) Service Manual page 78

GREE
NOTICE! In parameter 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 "
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:
Parameter Parameter
Code Name
Power-down
P15
memory mode
Historical fault
P17
clearing for IDU
Environment
temperature
P20
sensor settings
for IDU
Table 4.4 Engineering Parameter Setting List
Parameter Range
00: standby after power-down
recovery
01: restoring the original status
after power-down recovery
00: not cleared
01: cleared
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
72
Multi Variable Air Conditioners Indoor Unit
" or " ". Press the "MODE" button to switch to
Default Value
00
00
03
Remark
Historical faults of all IDUs
controlled by the current wired
controller are cleared.
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.