Gree GMV5 Series Service Manual page 145

2.2 Pressure exception
Primary reason
Fau
lt
cod Descripti
e Fault on
1. The
stop
valve of
the ODU
is not
fully
opened
as
required.
High
pressur
e
E1
protecti
on
2. The
system
pipeline
is
blocked.
GMV5 DC INVERTER VRF UNITS SERVICE MANUAL
Possible reasons
Secondary reason
Confirmat
ion Descripti
method on
—— ——
2.1. The
system
air
pipeline
is
blocked.
2.2 The
fluid pipe
is
blocked.
The
system's
exhaust
pressure
rises and
the low
pressure 2.4 The
is too low pipe that
(compare connects
d with the the IDU
reference is
value). blocked.
Confirmation Descripti
method
—— ——
2.1.1
The
block is
caused
Touch the
by
pipe along
solder.
the flowing
direction of 2.1.2
refrigerant to The
feel the pipeline
temperature is
difference. blocked
The by
difference is impuritie
large. s.
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
Touch the
pipe along block is
the flowing caused
by
direction of
solder.
refrigerant to
feel the 2.4.2
temperature The
difference. pipeline
The is
difference is blocked
large or part by
of the pipe is impuritie
frosting. s.
142
Tertiary reason
Confirmat
ion
on method
Fully open
Manual the stop
check valve.
Replace
and solder
the pipe.
Cut off
the pipe Replace
and and solder
check it. the pipe.
Replace
and solder
——
the pipe.
Replace
and solder
the pipe.
Cut off
the pipe Replace
and and solder
check it. the pipe.
Solution