Gree GMV5E Series Service Manual page 140

GREE
Fault
Fault
code
Description
temperature
sensor
failure
7. The
ambient
temperature
exceeds the
scope of
temperature
required for
safe
operation.
1. The
ODU's
electronic
expansion
valve is not
working
properly.
Low exhaust
E2 temperature
protection
2. The IDU's
electronic
expansion
valve is not
working
properly
Primary reason
Confirmation
Description
method
The outdoor
ambient
——
temperature
exceeds
50° C.
When the
system is
working in the
heating mode
1.2 The
and the ODU's controlling
electronic
heating
expansion electronic
valve is expansion
opened to
of the main
100PLS, the board or the
intake electronic
temperature of
expansion
the valve of the
corresponding
subcooler is
liquid-air faulty.
separator is
more than 1° C
lower than the
low-pressure
saturation
temperature
and the
difference
1.3 The
between the
body of the
compressor's
electronic
exhaust
expansion
temperature
valve is not
or cover
working
temperature
properly.
and the
high-pressure
temperature is
smaller than
10° C.
When the
2.1 The
system is
controlling
working in the
of electronic
cooling mode
expansion
and the ODU's
valve by
electronic
main board
expansion
of indoor
valve is
unit is
opened to
abnormal.
200PLS, the
GMV5E DC INVERTER VRF UNITS SERVICE MANUAL
Possible reasons
Secondary reason
Confirmation
method
Measure the
——
ambient
temperature.
1.2.1 The
control wire
of the
electronic
Reset the
ODU. Listen expansion
valve is not
to the sound
and touch the connected
tube to see if to the main
board.
the electronic
expansion
1.2.2 The
valve is reset.
control wire
If it is set, it is that
normal.
connects the
Otherwise, it electronic
is faulty. expansion
valve to the
main board
is broken.
1.3.1
Affected by
impurities in
the system
Other
reasons
1.3.2 The
body of the
valve is
faulty.
2.1.1 The
Reset the
control wire
IDU. Listen to
of the
the sound and
electronic
touch the tube
expansion
to see if the
valve is not
electronic
connected
expansion
to the main
valve is reset.
board.
If it is set, it is
normal.
2.1.2 The
136
Tertiary reason
Confirmation
Description
method
——
Manual
check
Manual
check
——
——
Manual
check
Manual
Solution
temperature
sensor or
main board.
It is a normal
phenomenon
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.
Replace the
body of the
electronic
expansion
valve.
Connect the
electronic
expansion
valve's
control wire
to the main
board.
Repair or