Gree GMV-120WM/B-F

GMV5 D.C INVERTER MULTI VRF SERVICE MANUAL
167
Fa
ult
co
de
Fault
Possible reasons
Solution
Primary reason
Secondary reason
Tertiary reason
Descripti
on
Confirmation
method
Description
Confirmatio
n method
Descripti
on
Confirmat
ion
method
E4
High
exhaus
t
temper
ature
protecti
on
3. The
system
pipeline
is
blocked.
The system's
exhaust
temperature
rises and the low
pressure is too
low (compared
with the
reference value).
3.1 The fluid
pipe is
blocked.
Touch the
pipe along
the flowing
direction of
refrigerant
to feel the
temperatur
e
difference.
The
difference
is large or
part of the
pipe is
frosting.
——
——
Replace and
solder the pipe.
3.2 The gas
pipe is
blocked.
——
——
Replace and
solder the pipe.
3.3 The pipe
that
connects the
IDU is
blocked.
Touch the
pipe along
the flowing
direction of
refrigerant
to feel the
temperatur
e
difference.
The
difference
is large or
part of the
pipe is
frosting.
3.3.1 The
block is
caused
by solder.
Cut off
the pipe
to see if it
is
blocked.
Replace and
solder the pipe.
3.3.2 The
pipeline is
blocked
by
impurities
.
Replace and
solder the pipe.
4.
Lacking
refrigera
nt
The system's
exhaust
temperature
rises and the low
pressure is too
low (compared
with the
reference value).
4.1 Not
enough
refrigerant
——
——
——
Inject refrigerant
as required.
4.2
Refrigerant
pipe leakage
Use the
refrigerant
leak
detector to
detect the
leak along
the pipe.
——
——
Stop the leak.
Pump out air
and inject
refrigerant
again.