Gree GMV-120WM/B-F Service Manual

GMV5 D.C INVERTER MULTI VRF SERVICE MANUAL
177
Feedback
from user
Exception
Possible reasons
Solution
Primary reason
Secondary reason
Tertiary reason
Descripti
on
Confirmati
on method
Description
Confirm
ation
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
temperature
of the IDU's
coil is more
than 5°C
higher than
the intake
temperature
; B. when
the IDU is
working in
the heating
mode and
the
electronic
expansion
valve is
opened to
2PLS, the
intake
temperature
of the IDU's
coil is more
than 12°C
lower than
the
saturation
temperature
correspondi
ng to the
high
3.2 The
outdoor
ambient
temperature
in the cooling
mode is
higher than
40°C （104
℉）.
Measur
e the
outdoor
ambien
t
temper
ature.
——
——
It is a
normal
phenomen
on.
3.3 The
ambient
temperature
of the IDU
that works in
the heating
mode is
lower than
12°C（54℉）.
Measur
e the
outdoor
ambien
t
temper
ature.
3.3.1 The
system
has
worked
for less
than 2
hours.
——
It is a
normal
phenomen
on.
3.3.2 An
improper
system is
selected.
——
Choose
another
system with
larger
power.
3.4 The
outdoor
ambient
temperature
in the
heating
mode is
lower than
-7°C .
Measur
e the
outdoor
ambien
t
temper
ature.
——
——
It is a
normal
phenomen
on.
4. Poor
airflow
distributi
on
design
——
4.1 The air
intake and
return inlet of
the ODU are
too close to
each other,
affecting the
heat exchange
performance of
the unit.
Check
the
distanc
e.
——
——
Re-design
the airflow
distribution.
4.2 The air
intake and
return inlet of
the IDU are
too close to
each other,
causing poor
heat
exchange of
the unit.
Check
the
distanc
e.
——
——
Re-design
the airflow
distribution.
7. Not
enough
refrigera
nt
Other
reasons
Incorrect
quantity of
refrigerant is
injected.
——
——
——
Check the
necessary
amount of
refrigerant
and inject
refrigerant
slowly via
the stop
valve of the
low-pressure
gas pipe.

Gree GMV-120WM/B-F Specifications

General

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