Gree GMV-100WL/A-T, Service Manual

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GREE DC Inverter Multi VRF System II Service Manual
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When applicable mode is selected, press SW3 to confirm. The related display is as below:
LED
Function code Display
nC ON
nH
ON
nA
ON
nF
ON
This setting will be memorized by master unit and can’t be cancelled even when power is on or off.
Then press SW4on the master unit to return to the previous step.
If then no motion is taken to the master unit for 5min, unit will exit and resume displaying the current
status.
(If this button is pressed when function is being set, system will return to the previous step. If SW4
is pressed when setting is finished, system will resume displaying the current operation status.)
Default setting is “nA” cooling and heating type.
Level B — IDU Mode Auto Control
When Level A is disabled or outdoor unit is set to be cooling and heating type, the operation mode
within one system depends on the master-salve setting of indoor units.
2.3.8 Forced Defrosting
This function can only be set when outdoor compressor is running.
Upon entering this function, main board of outdoor unit will display as below:
LED
Function code Display
n3 Blink
Press SW3 to confirm. When system enters this function, main board of outdoor unit will display as
below:
LED
Function code Display
n3 ON
Then unit will be in compulsory defrosting mode. Once unit is under compulsory defrosting, this
mode can only be stopped when requirements for exit are met.
2.3.9 Restore Factory Defaults
i.If you want to restore factory defaults, hold SW1+SW4 button on the main board of ODU for more
than 10s, then all LED will blink for 3s. Main board will cancel all setting, including the IP addresses and
project co des of IDU and ODU. The mark for finished debugging is “0”.
ii.If you want to restore factory defaults and don’t need project debugging, then hold SW 2 and SW4