Gree GMV5E Series Service Manual page 142

GREE
Fault
Primary reason
Fault
code
Description
3. The
ambient
temperature
is too high.
4. The
pressure
sensor is
faulty.
GMV5E DC INVERTER VRF UNITS SERVICE MANUAL
Possible reasons
Secondary reason
Confirmation
Description
method
is too low
(compared
with the
reference
value).
2.2 The fluid
pipe is
blocked.
2.4 The pipe
that
connects the
IDU is
blocked.
3.1 In the
cooling
mode, the
outdoor
temperature
is over 50° C.
3.2 In the
——
heating
mode, the
actual
ambient
temperature
of the IDU's
return air is
over 30° C.
4.1 The high
pressure
sensor is
——
faulty.
4.2 The high
pressure and
low pressure
Tertiary reason
Confirmation
Description
method
difference. The pipeline is
difference is blocked by
large. impurities.
Touch the pipe
along the flowing
direction of
refrigerant to feel
——
the temperature
difference. The
difference is large
or part of the pipe
is frosting.
Touch the pipe 2.4.1 The
along the flowing block is
direction of caused by
refrigerant to feel solder.
the temperature
2.4.2 The
difference. The
pipeline is
difference is large
blocked by
or part of the pipe
impurities.
is frosting.
Measure the
——
outdoor ambient
temperature.
Measure the
temperature of
——
the unit's return
air.
Stop the whole
system. Test the
system's balance
pressure 20
minutes later and
convert the
pressure into the
corresponding
——
saturation
temperature.
Compare it with
the outdoor
ambient
temperature. If
the difference is
larger than 5° C, it
is exceptional.
Connect the stop
——
valve of the
module fluid pipe
138
Solution
Confirmation
method
the pipe.
Replace and solder
——
the pipe.
Replace and solder
the pipe.
Cut off the
pipe and
check it.
Replace and solder
the pipe.
It is a normal
phenomenon caused
——
by the protection
function.
It is a normal
phenomenon caused
——
by the protection
function.
Replace the high
——
pressure sensor.
Reconnect the high-
——
and low-pressure
sensors.