Gree GMV5 Series Service Manual page 155

GMV5 DC INVERTER VRF UNITS SERVICE MANUAL
——
4. Poor
airflow
distributi
on
design
7. Not
enough
refrigera Other
nt reasons
3.4 The
outdoor
ambient
temperat
ure in
the Measure
heating the
mode is outdoor
lower ambient
than temperat
-7° C . ure.
4.1 The
air
intake
and
return
inlet of
the ODU
are too
close to
each
other,
affecting
the heat
exchang
e
performa Check
nce of the
the unit. distance.
4.2 The
air
intake
and
return
inlet of
the IDU
are too
close to
each
other,
causing
poor
heat
exchang Check
e of the the
unit. distance.
——
Incorrect
quantity
of
refrigera
nt is
injected.
152
—— ——
It is a
normal
phenome
non.
—— ——
Re-desig
n the
airflow
distributio
n.
—— ——
Re-desig
n the
airflow
distributio
n.
Check
the
necessar
y amount
of
refrigeran
t and
—— ——
inject
refrigeran
t slowly
via the
stop
valve of
the