Gree GMV-Pdm450W/NaB-M

DC Inverter Multi
VRF Service Manual
179
7) 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:blink; green led:dark; yellow led:dark
Hanging indoor units: red led:blink; green led:dark; yellow led:dark
Yes
Yes
No
No
Temperature sensor error
If the plug on
temperature sensor is correctly
connected to the socket on
mainboard?
Check the orientation of plug and socket
Remove the
temperature and measure if its
resistance is within normal
range?
Replace the temperature sensor
Replace the mainboard of indoor unit
2�6 Sensor Trouble
1) High-voltage sensor error
Error display on hand controller: Fc
Outdoor units mainboard indicator: led4: bright; led3: blink; led2: blink; led1: blink
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:blink; green led:dark; yellow led:dark
Hanging indoor units: red led:blink; green led:dark; yellow led:dark
Pressure sensor error
Check if the plug of high
pressure sensor is correctly
connected to the socket?
Measure if the output value
(DC voltage) of the outdoor
mainboard socket is normal?
Replace the mainboard of
outdoor unit
Check the orientation of plug
and socket
Replace the high pressure
sensor
No
Yes
No
Yes
Troubleshooting steps for low-voltage sensor and high-voltage sensor
2) Low-voltage sensor error
Error display on hand controller: Fd
Outdoor units mainboard indicator: led4: bright; led3: bright; led2: blink; led1: blink