Gree GMV MTAC VRF Series, Service Manual

Page: 96 / 117

Gree GMV MTAC VRF for North America
92
(5) Mafunction of temperature sensor.
Malfunction of
temperature
sensor
Whether the plug of temperature is
connected with the plug of main board
correctly
Conform whether the
plug is connected
correctly
Replace main
board
YES
NO
Measure whether resistance value of
temperature sensor is in the normal range
Replace temperature
sensor
YES
NO
(6) Malfunction of sensor.
Malfunction of
sensor
Check whether plug of sensor is
connected with socket correctly
Confirm whether the
plug is connected
correctly
Replace main board
of outdoor unit
YES
NO
Measure whether the output value (DC
voltage) for socket of main board of outdoor
unit is normal
Replace
pressure
sensor
YES
NO
(7) Unit and main board can’t be energized.
Unit and main board can’t
be energized
Measure whether voltage between pole L
and pole N of wiring board is 220V
Check whether it
’
s
the malfunction of
power supply for
wiring board
Replace main board
of outdoor unit
YES
NO
Check whether there
’
s power
supply for filter board
Replace filter
board
YES
NO