Gree GMV5 Series Service Manual page 153

Feedback
from user Exception
A. When
the IDU is
working in
the
cooling
mode and
the
electronic
expansio
n valve is
opened to
2000PLS,
the
exhaust
temperatu
re of the
IDU's coil
is more
than 5° C
higher
than the
intake
temperatu
Poor re; B.
heating/co when the
oling IDU is
performan working in
ce the
heating
mode and
the
electronic
expansio
n valve is
opened to
2PLS, the
intake
temperatu
re of the
IDU's coil
is more
than 12° C
lower
than the
saturation
temperatu
re
correspon
ding to
the high
pressure;
GMV5 DC INVERTER VRF UNITS SERVICE MANUAL
Primary reason
Confirm
Descript ation
ion method
1. The
stop
valve of
the
ODU is
——
not fully
opened
as
required
.
——
2. The
system
pipeline
is
blocked.
Possible reasons
Secondary reason
Confirm
Descripti ation
on method
—— ——
Touch
the pipe
along
the
flowing
direction
of
refrigera
nt to feel
the
temperat
2.1. The ure
system differenc
air e. The
pipeline differenc
is e is
blocked. large.
Touch
the pipe
along
the
flowing
direction
of
refrigera
nt to feel
the
temperat
ure
differenc
e. The
differenc
e is large
2.2 The or part of
fluid pipe the pipe
is is
blocked. frosting.
2.4 The Touch
pipe that the pipe
connects along
the IDU the
is flowing
blocked. direction
150
Tertiary reason
Confirm
Descrip ation
tion method
——
Manual
check
2.1.1
The
block is
caused
by
solder.
2.1.2
The
pipeline
is
blocked Cut off
by the pipe
impuriti and
es. check it.
—— ——
2.4.1
The
block is Cut off
caused the pipe
by and
solder. check it.
Solution
Fully
open the
stop
valve.
Replace
and
solder
the pipe.
Replace
and
solder
the pipe.
Replace
and
solder
the pipe.
Replace
and
solder
the pipe.