Pressure - Gree GMV-S120WL/A-S Service Manual

re sensor
failure
4.Too
much
refrigeran

4.1.2.2 Pressure

Fau
lt Primary cause
Fault
cod
Descriptio
e
n
1.The
stop valve
of the
ODU is
not fully
opened as
required.
High
pressur
E1 e
protecti
on
2.The
system
pipeline is
blocked.
GMV5 Home DC Inverter Multi VRF Units
Other quantity of
reasons refrigerant
t is injected.
Confirmati Descriptio
on method
The
system's
exhaust
pressure
2.1The
rises and
system air
the low
pipeline is
pressure is
blocked.
too low
(compared
with the
reference
Incorrect
Possible causes
Secondary cause
Confirmation
n method
Touch the pipe
along the
flowing
direction of
refrigerant to
feel the
temperature
difference. The
difference is
large.
276
Tertiary cause
Descripti Confirmati
on on method
Manual
check
2.1.1The
block is
caused
by solder.
Cut off the
2.1.2The
pipeline pipe and
is check it.
blocked
by
impurities
.
temperatur
e sensor
or main
board.
Check the
necessary
amount of
refrigerant
and
discharge
the
unneeded
refrigerant
slowly via
the stop
valve of
the fluid
pipe.
Solution
Fully open
the stop
valve.
Replace
and solder
the pipe.
Replace
and solder
the pipe.