Gas-Mixing Protection Of 4-Way Valve - Gree GMV5E Series Service Manual

GREE
Fault
Fault
code
Fan drive current
HC
detection circuit fault
Variable frequency
HJ
fan starting failure

2.2 Gas-mixing protection of 4-way valve

2.2.1 System exhaust temperature exception
Fault
Fault
code
Description
1. The stop
valve of the
ODU is not
fully opened
as required.
High
2. The IDU's
exhaust
electronic
E4
temperature
expansion
protection
valve is not
working
properly.
3. The
system
Possible reasons
3.The fan drive board is faulty.
1.The fan drive board is faulty.
1.The drive board is damaged;
2.The fan's UVW cable is not connected
properly;
3.The fan is damaged.
Primary reason
Confirmation
Description
method
—— ——
When the IDU
is working in
the cooling
mode and the
electronic
2.1 The
expansion
controlling
valve is
of electronic
opened to
expansion
2000PLS, the
valve by
exhaust
main board
temperature of
of indoor
the IDU's coil
unit is
is more than
abnormal.
15° C higher
than the
intake
temperature;
when the IDU
is working in
the heating
mode and the
electronic
expansion
2.2 The
valve is
electronic
opened to
expansion
2000PLS, the
valve in the
intake
mode
temperature of
switcher is
the IDU's coil
faulty.
is more than
10° C higher
than the
intake
temperature;
The system's 3.1 The fluid
exhaust pipe is
GMV5E DC INVERTER VRF UNITS SERVICE MANUAL
wiring diagram;
3.Replace the fan drive board.
1.Replace the fan drive board.
1.Replace the fan drive board;
2.Reconnect the fan's UVW cable;
3.Replace the fan.
Possible reasons
Secondary reason
Confirmation
method
—— ——
2.1.1 The
control wire
of the
electronic
Reset the
expansion
IDU. Listen to
the sound and valve is not
connected
touch the tube
to see if the to the main
electronic board.
expansion 2.1.2 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.
2.2.1
Affected by
impurities in
the system
Other
reasons
2.2.2 The
valve body
is faulty.
Touch the
——
pipe along the
134
Solution
Tertiary reason
Confirmation
Description
method
Manual
check
Manual
check
Manual
check
——
——
——
Solution
Fully open
the stop
valve.
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.
Replace and
solder the