Gree GMV5 Series Service Manual page 152

7. Not
enough
refrigera
nt
2.3 Poor cooling/heating performance
GMV5 DC INVERTER VRF UNITS SERVICE MANUAL
6.2 The
ODU's
fan is
faulty.
Incorrect
quantity
of
refrigera
Other nt is
reasons injected.
damaged.
6.1.3 The
motor is
damaged.
6.2.1 The
fan motor
is not
properly
connected
with the
control
board of
the motor.
6.2.2 The
fan motor
is not
properly
connected
with the
control
board of
the motor
with the
communic
ation
feedback
cable.
6.2.3 The
control
board of
the fan's
motor is
damaged.
6.2.4 The
main
board of
the fan's
Manual motor is
check damaged.
——
149
Other
reasons
Manual
check
Manual
check
Manual
check
Other
reasons
—— ——
Replace
the
motor.
Reconne
ct it
properly.
Reconne
ct it
properly.
Replace
the
control
board of
the
motor.
Replace
the
motor.
Check
the
necessar
y amount
of
refrigeran
t and
inject
refrigeran
t slowly
via the
stop
valve of
the
low-press
ure air
pipe.