Gree GMV-615WM/B-X - Page 151

GMV5 DC INVERTER VRF UNITS SERVICE MANUAL
148
later and
convert the
pressure
into the
correspondi
ng
saturation
temperature.
Compare it
with the
outdoor
ambient
temperature.
If the
difference is
larger than
5°C , it is
exceptional.
4.2 The
high
pressure
and low
pressure
sensors
are
connect
ed
reversel
y.
Connect the
stop valves
of the
module
high- and
low-pressur
e air pipes to
the high and
low pressure
gauges and
transform
the readings
into
correspondi
ng
temperature
s. Compare
them to the
high- and
low-tempera
tures tested
by the
system. If
the
difference is
larger than
5°C , it is
exceptional.
——
——
Reconne
ct the
high- and
low-press
ure
sensors.
6. The
fan is
not
working
properly.
A. The
IDU's fan
does not
work in
the
cooling
mode. B.
The
ODU's
fan does
not work
in the
heating
mode.
6.1 The
IDU's
fan is
faulty.
Manual
check
6.1.1 The
power
cable
connecting
the motor
and main
board is
loose.
Manual
check
Reconne
ct the
motor
with the
power
cable.
6.1.2 The
electric
capacity is
not
connected
or is
Manual
check
Connect
or
replace
the
electric
capacity.