Gree GMV5 - Page 164

GREE Photovoltaic Direct-driven Inverter Multi VRF Units
160
Fault
code
Fault
Possible reasons
Solution
Primary reason
Secondary reason
Tertiary reason
Description
Confirmation
method
Description Confirmation method Description
Confirmation
method
JL
Low high
pressure
protection
1. The ambient
temperature
exceeds the
range.
——
1.1 The outdoor
ambient
temperature in
the cooling
mode is lower
than -10°C.
Measure the outdoor
ambient temperature.
—— ——
It is a normal
phenomenon
caused by the
protection function.
1.2 The indoor
ambient
temperature in
the heating
mode is lower
than 5°C.
Measure the temperature
of the unit's return air.
—— ——
It is a normal
phenomenon
caused by the
protection function.
2. Not enough
refrigerant
——
Locate the leak and
inject refrigerant.
Fault
code
Fault
Possible reasons
Solution
Primary reason Secondary reason Tertiary reason
Description
Confirmation
method
Description Confirmation method Description
Confirmation
method
E3
Low-pre
ssure
Protection
1. The stop
valve of the
ODU is not
fully opened as
required.
—— —— —— —— Manual check
Fully open the
stop valve.
2. The system
pipeline is
blocked.
The system's
exhaust
pressure rises
and the low
pressure is too
low (compared
with the
reference value).
2.1. The
system air
pipeline is
blocked.
Touch the pipe along the
flowing direction of
refrigerant to feel the
temperature difference.
The
difference is large.
2.1.1 The block is
caused by solder.
Cut off the pipe
and check it.
Replace and
solder the pipe.
2.1.2 The pipeline is
blocked by
impurities.
Replace and
solder the pipe.
2.2 The fluid
pipe is blocked.
Touch the pipe along the
flowing direction of
refrigerant to feel the
temperature difference. The
difference is large or part of
the pipe is frosting.
—— ——
Replace and
solder the pipe.
2.4 The pipe
that connects
the IDU is
blocked.
Touch the pipe along the
flowing direction of
refrigerant to feel the
temperature difference. The
difference is large or part of
the pipe is frosting.
2.4.1 The block is
caused by solder.
Cut off the pipe
and check it.
Replace and
solder the pipe.
2.4.2 The pipeline is
blocked by
impurities.
Replace and
solder the pipe.
3. The ambient
temperature is
too low.
——
3.1 The
outdoor
ambient
temperature is
lower than
-25°C in the
heating mode.
Measure the outdoor
ambient temperature.
—— ——
It is a normal
phenomenon
caused by the
protection
function.