Gree GMV5

GREE Photovoltaic Direct-driven Inverter Multi VRF Units
155
Fault
code
Fault Possible reasons Solution
HH
Fan drive DC bus high
voltage protection
1. Does the voltage of the input power
cable of the whole system exceed 460
V;
2. The fan drive board is faulty.
1. Lower the voltage of the input power
cable to the required range;
2. Replace the fan drive board.
HL
Fan drive DC bus low
voltage protection
1. Is the voltage of the input power
cable of the whole system lower than
320 V;
2. Is the fan drive board well
connected with the compressor drive
board;
3. The fan drive board is faulty.
1. Elevate the voltage of the input power
cable to the required range;
2. Connect the fan drive board with the
compressor drive board according to the
wiring diagram;
3. Replace the fan drive board.
HC
Fan drive current
detection circuit fault
1. The fan drive board is faulty. 1. Replace the fan drive board.
HJ
Variable frequency fan
starting failure
1. The drive board is damaged;
2. The fan's UVW cable is not
connected properly;
3. The fan is damaged.
1. Replace the fan drive board;
2. Reconnect the fan's UVW cable;
3. Replace the fan.
2.3 System Faults
2.3.1 System Exhaust Temperature Exception
Fault
code
Fault
Possible reasons
Solution
Primary reason Secondary reason Tertiary reason
Description
Confirmation
method
Description
Confirmation
method
Description
Confirmation
method
E4
High exhaust
temperature
protection
1. The stop
valve of the
ODU is not fully
opened as
required.
—— —— —— ——
Manual
check
Fully open the stop
valve.
2. The IDU's
electronic
expansion valve
is not working
properly.
When the IDU is
working in the
cooling mode and
the electronic
expansion valve is
opened to
2000PLS, the
exhaust
temperature of the
IDU's coil is more
than 15°C higher
than the intake
temperature; when
the IDU is working
in the heating
mode and the
electronic
expansion valve is
opened to
2000PLS, the
intake temperature
of the IDU's coil is
more than 10°C
higher than the
intake temperature;
2.1 The
controlling of
electronic
expansion valve
by main board of
indoor unit is
abnormal.
Reset the IDU.
Listen to the sound
and touch the tube
to see if the
electronic expansion
valve is reset.
If it is set, it is
normal.
Otherwise, it is faulty.
2.1.1 The control
wire of the
electronic
expansion valve
is not connected
to the main
board.
Manual
check
Connect the
electronic expansion
valve's control wire to
the main board.
2.1.2 The control
wire that
connects the
electronic
expansion valve
to the main
board is broken.
Manual
check
Repair or replace the
control wire of the
electronic expansion
valve.
2.2 The
electronic
expansion valve
in the mode
switcher is faulty.
Other reasons
2.2.1 Affected b
y
impurities in the
system
——
Clean the system
and clear the
impurities. Replace
the body of the
electronic expansion
valve.
2.2.2 The valve
body is faulty.
——
Replace the body of
the electronic
expansion valve.