Gree GMV-120WM/B-F Service Manual

GMV5 D.C INVERTER MULTI VRF SERVICE MANUAL
176
(3) Poor cooling/heating performance
Feedback
from user
Exception
Possible reasons
Solution
Primary reason
Secondary reason
Tertiary reason
Descriptio
n
Confirm
ation
method
Descripti
on
Confirmation
method
Descripti
on
Confirmati
on method
Poor
heating/cooli
ng
performance
A. When
the IDU is
working in
the cooling
mode and
the
electronic
expansion
valve is
opened to
2000PLS,
the exhaust
temperatur
e of the
IDU's coil is
more than
5°C higher
than the
intake
temperatur
e; B. when
the IDU is
working in
the heating
mode and
the
electronic
expansion
valve is
opened to
2PLS, the
intake
temperatur
e of the
IDU's coil is
more than
12°C lower
than the
saturation
temperatur
e
correspondi
ng to the
high
pressure;
1. The
stop valve
of the
ODU is
not fully
opened
as
required.
——
——
——
——
Manual
check
Fully open
the stop
valve.
2. The
system
pipeline is
blocked.
——
2.1. The
system
gas
pipeline
is
blocked.
Touch the
pipe along
the flowing
direction of
refrigerant to
feel the
temperature
difference.
The
difference is
large.
2.1.1 The
block is
caused
by
solder.
Cut off the
pipe and
check it.
Replace
and solder
the pipe.
2.1.2 The
pipeline
is
blocked
by
impuritie
s.
Replace
and solder
the pipe.
2.2 The
fluid pipe
is
blocked.
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.
——
——
Replace
and solder
the pipe.
2.4 The
pipe that
connects
the IDU
is
blocked.
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.
2.4.1 The
block is
caused
by
solder.
Cut off the
pipe and
check it.
Replace
and solder
the pipe.
2.4.2 The
pipeline
is
blocked
by
impuritie
s.
Replace
and solder
the pipe.
3. The
ambient
temperatu
re
exceeds
the
required
range.
——
3.1 The
ambient
temperat
ure of the
IDU that
works in
the
cooling
mode is
higher
than
32°C （90
℉）.
Measure the
outdoor
ambient
temperature.
3.1.1 The
system
has
worked
for less
than 1
hour.
——
It is a
normal
phenomen
on.
3.1.2 An
improper
system is
selected.
——
Choose
another
system
with larger
power.

Gree GMV-120WM/B-F Specifications

General

Brand	Gree
Model	GMV-120WM/B-F
Category	Inverter
Language	English