Gree GMV5 Series Service Manual page 143

GMV5 DC INVERTER VRF UNITS SERVICE MANUAL
re
temperature
is smaller
than 10° C
When the
system is
working
in the
cooling
mode and
the ODU's
electronic
expansion
valve is
opened
to 200PLS,
the exhaust
temperature
2. The of the IDU's
IDU's coil is more
electronic than 1° C
expansion lower than
valve is the intake
not pipe's
working temperature
properly and the
difference
between
the
compressor'
s exhaust
temperature
or cover
temperature
and the
high-pressu
re
temperature
is smaller
than 10° C
3.
Exhaust
——
temperatu
re sensor
failure
.
Reset the
IDU.
Listen to
2.1 The
the sound
controlling
and touch
of
the tube to
electronic
see if the
expansion
electronic
valve by
expansion
main
valve is
board of
reset.
indoor unit
If it is set,
is
it is
abnormal.
normal.
Otherwise,
it is faulty.
2.2 The
body of
the
electronic
Other
expansion
reasons
valve is
not
working
properly.
.
—— ——
140
1.3.2 The
body of
——
the valve
is faulty.
2.1.1 The
control
wire of
the
electronic
expansio Manual
n valve is check
not
connecte
d to the
main
board.
2.1.2 The
control
wire that
connectin
g
the Manual
electronic check
expansio
n valve to
the main
board is
broken.
2.2.1
Affected
by
——
impurities
in the
system
2.2.2 The
valve
——
body is
faulty.
—— ——
Replace
the body of
the
electronic
expansion
valve.
Connect
the
electronic
expansion
valve's
control
wire to the
main
board.
Repair or
replace the
control
wire of the
electronic
expansion
valve.
Clean the
system
and clear
the
impurities.
Replace
the body of
the
electronic
expansion
valve.
Replace
the body of
the
electronic
expansion
valve.
Replace
the
temperatur
e sensor or
main
board.