Gree GMV5 - Page 162

GREE Photovoltaic Direct-driven Inverter Multi VRF Units
158
2.3.2 Pressure Exception
Fault
code
Fault
Possible reasons
Solution
Primary reason
Secondary reason
Tertiary reason
Description
Confirmation
method
Description Confirmation method Description
Confirmation
method
E1
High
pressure
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 high.
——
3.1 In the
cooling mode,
the outdoor
temperature is
over 50°C.
Measure the outdoor
ambient temperature.
—— ——
It is a normal
phenomenon
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.
Measure the
temperature of the unit's
return air.
—— ——
It is a normal
phenomenon
caused by the
protection
function.
4. The
pressure
sensor 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, it is exceptional.
—— ——
Replace the
high pressure
sensor.