GMV5 D.C INVERTER MULTI VRF SERVICE MANUAL
172
3.
The
ambi
ent
temp
eratu
re is
too
high.
3.1 In the
cooling mode,
the outdoor
temperature is
over 50°C （122
℉）.
Measure the outdoor
ambient temperature.
It is a
normal
phenomen
on caused
by the
protection
function.
3.2 In the
heating mode,
the actual
ambient
temperature of
the IDU's return
air is over 30°C
（86℉）.
Measure the temperature of
the unit's return air.
It is a
normal
phenomen
on caused
by the
protection
function.
4.
The
press
ure
sens
or 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 corresponding
saturation temperature.
Compare it with the outdoor
ambient temperature. If the
difference is larger than 5°C
（9℉）, it is exceptional.
Replace
the high
pressure
sensor.
4.2 The high
pressure and
low pressure
sensors are
connected
reversely.
Connect the stop valve of
the module fluid pipe and
gas pipe to the high and low
pressure gauges and
transform the readings into
corresponding
temperatures. Compare
them to the high- and
low-temperatures tested by
the system. If the difference
is larger than 5°C（9℉）, it is
exceptional.
Reconnect
the high-
and
low-pressur
e sensors.
5.
The
high
press
ure
switc
h is
faulty
.
E1
protecti
on is
display
ed on
the unit
when it
is
powere
d on.
5.1 The high
pressure switch
is not
connected to
the main board.
5.1.1 The
pressure
switch is not
connected
to the main
board.
5.1.2 The
connect wire
between the
pressure
switch and
main board
is faulty.
Reconnect
them with
the wire.
5.2 The high
pressure switch
is damaged.
To Next Page
Loading...
Need help?
General