Gree GMV-Pdm450W/NaB-M

180
DC Inverter Multi
VRF Service Manual
Indoor units mainboard indicators:
Patio indoor units: red led: blink:red led:blink; green led:dark; yellow led:dark
FY wall-mounting motor: red led:blink; yellow led:dark
New FY wall-mounting motor: red led:blinkl; green led:dark; yellow led:dark
Hanging indoor units: red led:blink; green led:dark; yellow led:dark
2�7 No energization to the unit and mainboard
No energization to the unit and
mainboard
Check the units main wiring board
L1: if N voltage is 220V.
Check if the air switch of the units
is : ON
Check if the power of wiring
board is in trouble
NO
YES
YES
Check if the phase
sequence protector of the units is
blight.
YES
Check if 220V transformer
of the mainboard is output.
YES
Connect with primary coil,
and then check if the 12V,5V
transformers are output.
Turn the air switch lamp: ON
NO
Check the connection.
NO
Replace the transformer.
NO
Adjust the phase sequence of
the three-phase power of main
wiring board
NO