Gree GMV-400WM/B-X - Page 145

GMV5 DC INVERTER VRF UNITS SERVICE MANUAL
142
2.2 Pressure exception
Fau
lt
cod
e
Fault
Possible reasons
Solution
Primary reason
Secondary reason
Tertiary reason
Descripti
on
Confirmat
ion
method
Descripti
on
Confirmation
method
Descripti
on
Confirmat
ion
method
E1
High
pressur
e
protecti
on
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.
The
system's
exhaust
pressure
rises and
the low
pressure
is too low
(compare
d with the
reference
value).
2.1. The
system
air
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.