Gree GMV5E Series Service Manual page 144

GREE
Fault
Primary reason
Fault
code
Description
7. Too much
refrigerant
1. The
ambient
temperature
Low high
exceeds the
JL pressure
range.
protection
2. Not
enough
refrigerant
GMV5E DC INVERTER VRF UNITS SERVICE MANUAL
Possible reasons
Secondary reason
Confirmation
Description
method
Incorrect
Other quantity of
reasons refrigerant is
injected.
1.1 The
outdoor
ambient
temperature
in the
cooling
mode is
lower than
-10° C.
——
1.2 The
indoor
ambient
temperature
in the
heating
mode is
lower than
5° C.
——
Tertiary reason
Confirmation
Description
method
board of the
motor with
the power
cable.
6.2.2 The
fan motor is
not properly
connected
with the
control
board of the
motor with
the signal
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
motor is
damaged.
—— ——
Measure the
——
outdoor ambient
temperature.
Measure the
temperature of
——
the unit's return
air.
140
Solution
Confirmation
method
Manual Reconnect it
check properly.
Manual Replace the control
check board of the motor.
Other
Replace the motor.
reasons
Check the necessary
amount of refrigerant
and discharge
——
unneeded refrigerant
slowly via the stop
valve of the fluid
pipe.
It is a normal
phenomenon caused
——
by the protection
function.
It is a normal
phenomenon caused
——
by the protection
function.
Locate the leak and
inject refrigerant.