Gree GMV5E Series Service Manual page 139

GREE
Fault
Fault
code
Description
pipeline is
blocked.
4. Lacking
refrigerant
5. Wrong
refrigerant is
injected.
6. Exhaust
Primary reason
Confirmation
Description
method
temperature blocked.
rises and the
low pressure
is too low
(compared
3.2 The air
with the
pipe is
reference
blocked.
value).
3.3 The pipe
that
connects
the IDU is
blocked.
The system's 4.1 Not
exhaust enough
temperature refrigerant
rises and the
low pressure
4.2
is too low
Refrigerant
(compared
pipe
with the
leakage
reference
value).
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.
—— ——
GMV5E DC INVERTER VRF UNITS SERVICE MANUAL
Possible reasons
Secondary reason
Confirmation
method
flowing
direction of
refrigerant to
feel the
temperature
difference.
——
The
difference is
large or part
of the pipe is
frosting.
Touch the pipe 3.3.1 The
along the block is
flowing caused by
direction of solder.
refrigerant to
feel the
temperature
3.3.2 The
difference. pipeline is
The difference
blocked by
is large or part impurities.
of the pipe is
frosting.
—— ——
Use the
refrigerant
leak detector
——
to detect the
leak along the
pipe.
—— ——
——
135
Tertiary reason
Confirmation
Description
method
——
Cut off the
pipe to see if
it is blocked.
——
——
——
Solution
pipe.
Replace and
solder the
pipe.
Replace and
solder the
pipe.
Replace and
solder the
pipe.
Inject
refrigerant as
required.
Stop the
leak. Pump
out air and
inject
refrigerant
again.
Discharge
existing
refrigerant
and inject
the correct
refrigerant
as required.
Replace the