Gree GMVVQ1015WM/C-X, Service Manual

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Gree GMV6 HR DC Inverter VRF Units Service Manual
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while nE, 00, and 28 indicate –28 degrees.
If a parameter is invalid on the unit, value "00" is displayed.
If there are two levels of menus on the master unit, you can press the SW4 back button to return to
the previous level. Press the SW4 query button again to exit query status.
If you do not press any button on the master unit in 5 minutes, the system will automatically exit the
current screen and the unit will resume displaying the current status.
4.1.2.4.3 n8 Indoor Unit Engineering SN Query
Introduction:
This function makes all indoor units display their SN respectively by performing an operation on the
outdoor unit, facilitating indoor unit address query.
Operations:
Press the SW1 up button and the SW2 down button to select indoor unit engineering SN query. The
master unit displays as follows:
LED1 LED2 LED3
Function Code Display status
Current
process/mode
Display status Current status Display status
n8 Blinks 00 Blinks 00 Blinks
Press the SW3 confirm button on the master unit to confirm the selection. The master unit displays
as follows, and other modules normally display the corresponding status:
LED1 LED2 LED3
Function Code Display status
Current
process/mode
Display status Current status Display status
n8 On 00 On 00 On
At this time, regardless of the current display status of all indoor unit wired controllers or display
panels, all of them switch to display the engineering number of the internal unit, without affecting the
setting and operation status of the indoor units and the outdoor unit.
Press the SW4 back button on the master unit to return to the upper operation level, but the indoor
units remains displaying the engineering numbers.
Press and hold the SW4 back button on the master unit for over 5 seconds to make all indoor units
exit displaying the engineering numbers and return to the upper operation level.
If you do not press any button on the master unit to exit indoor unit engineering SN query in 30
minutes, the system will automatically exit the current screen and the unit will resume displaying the
current status.
4.1.2.4.4 n9 Online Indoor Unit Qty Query
Introduction:
This function directly uses the outdoor unit to query the quantity of online indoor units.
Operations:
In n9 online indoor unit qty query status, the module displays as follows:
LED1 LED2 LED3
Function Code Display status Current process/mode Display status Current status Display status
n9 On AC or AH On 00 Blinks