Gree GMV5 Series Service Manual page 141

GMV5 DC INVERTER VRF UNITS SERVICE MANUAL
pressure is
too low
(compared
with the
reference
value).
The
system's
exhaust
temperature
rises and
4. Lacking the low
refrigerant pressure is
too low
(compared
with the
reference
value).
Stop the
whole
system.
Test
the
system's
balance
pressure 20
minutes
later and
5. Wrong convert the
refrigerant pressure
is into the
injected. correspondi
ng
saturation
temperature.
Compare it
with the
outdoor
ambient
temperature
. If the
difference is
temperatur
e
difference.
3.2 The The
air pipe is difference
blocked. is large or
part of the
pipe is
frosting.
Touch the
pipe along
the flowing
direction of
refrigerant
3.3 The to feel the
pipe that temperatur
connects e
the IDU is difference.
blocked. The
difference
is large or
part
of the pipe
is frosting.
4.1 Not
——
enough
refrigerant
Use the
refrigerant
4.2
leak
Refrigera
detector to
nt pipe
detect the
leakage
leak along
the pipe.
—— ——
138
—— ——
3.3.1 The
block is
caused
by solder.
Cut off the
pipe to see
3.3.2 The
if it is
pipeline
blocked.
is
blocked
by
impurities
.
—— ——
—— ——
—— ——
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.