Gree GMV5 Series Service Manual page 147

GMV5 DC INVERTER VRF UNITS SERVICE MANUAL
E1
protection
is
displayed
5. The on the
high unit when
pressure it is
switch is powered
faulty. on.
A. The
ODU's
fan does
not work
in the
6. The cooling
fan is not mode. B.
working The IDU's
properly. motor
Connect the
stop valve of
the module
fluid pipe and
air pipe to the
high and low
pressure
gauges and
transform the
readings into
correspondin
g
temperatures
4.2 The . Compare
high them to the
pressure high- and
and low low-temperat
pressure ures tested
sensors by the
are system. If the
connecte difference is
d larger than
reversely 5° C , it is
. exceptional.
——
5.1 The
high
pressure
switch is
not
connecte
d to the
main
——
board.
5.2 The
high
pressure
switch is
damaged
——
.
6.1 The
IDU's fan
is faulty. Manual check
144
—— ——
5.1.1
The
pressure
switch is
not
connect
ed to the
main
——
board.
5.1.2
The
connect
wire
between
the
pressure
switch
and
main
board is
——
faulty.
—— ——
6.1.1
The
power
cable
connecti
ng the
motor
and Manual
main check
Reconnec
t the high-
and
low-press
ure
sensors.
Reconnec
t it.
Reconnec
t them
with the
wire.
Replace
the
pressure
switch.
Reconnec
t the
motor with
the power
cable.