Gree GMV5 Series Service Manual page 142

Exhaust
temperatu
re sensor
failure
7. The
ambient
temperatu
exceeds
the scope
temperatu
required
for safe
operation.
1. The
Low ODU's
exhaust electronic
temperat expansion
E2
ure valve is
protectio
n working
properly.
GMV5 DC INVERTER VRF UNITS SERVICE MANUAL
larger than
5° C , it is
exceptional.
6.
——
re
——
of
re
When the
system is
working
in the
heating
mode and
the ODU's
electronic
expansion
valve is
opened to
100PLS,
the intake
temperature
of the
correspondi
ng liquid-air
separator is
not more than
1° C lower
than the
low-pressur
e saturation
temperature
and the
difference
between the
compressor'
s exhaust
temperature
or cover
temperature
and the
high-pressu
——
The
outdoor Measure
ambient the
temperatu ambient
re temperatur
exceeds e.
50° C .
Reset the
1.2 The
ODU.
controlling
Listen to
heating
the sound
electronic
and touch
expansion
the tube to
of the
see if the
main
electronic
board or
expansion
the
valve is
electronic
reset.
expansion
If it is set,
valve of
it is
the
normal.
subcooler
Otherwise,
is faulty.
it is faulty.
1.3 The
body of
the
electronic
Other
expansion
reasons
valve is
not
working
properly.
139
——
—— ——
1.2.1 The
control
wire of
the
electronic
expansio Manual
n valve is check
not
connecte
d to the
main
board.
1.2.2 The
control
wire that
connects
the
Manual
electronic
check
expansio
n valve to
the main
board is
broken.
1.3.1
Affected
by
——
impurities
in the
system
Replace
the
temperatur
e sensor or
main
board.
It is a
normal
phenomen
on caused
by the
protection
function.
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.