Gree GMV-400WM/B-X - Page 146

GMV5 DC INVERTER VRF UNITS SERVICE MANUAL
143
3. The
ambient
temperat
ure is too
high.
——
3.1 In the
cooling
mode,
the
outdoor
temperat
ure is
over
50°C .
Measure the
outdoor
ambient
temperature.
——
——
It is a
normal
phenome
non
caused by
the
protection
function.
3.2 In the
heating
mode,
the
actual
ambient
temperat
ure of the
IDU's
return air
is over
30°C .
Measure the
temperature
of the unit's
return air.
——
——
It is a
normal
phenome
non
caused by
the
protection
function.
4. The
pressure
sensor is
faulty.
——
4.1 The
high
pressure
sensor is
faulty.
Stop the
whole
system. Test
the system's
balance
pressure 20
minutes later
and convert
the pressure
into the
correspondin
g saturation
temperature.
Compare it
with the
outdoor
ambient
temperature.
If the
difference is
larger than
5°C , it is
exceptional.
——
——
Replace
the high
pressure
sensor.