Gree GMV-400WM/B-X - Page 152

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