Gree GMV-120WM/B-F

GMV5 D.C INVERTER MULTI VRF SERVICE MANUAL
168
Faul
t
cod
e
Fault
Possible reasons
Solution
Primary reason
Secondary reason
Tertiary reason
Description
Confirmation
method
Description
Confirmatio
n method
Descriptio
n
Confirmatio
n method
E4
High
exhaust
temperatur
e
protection
5. Wrong
refrigerant
is injected.
Stop the
whole
system. Test
——
——
——
——
Discharge
existing
refrigerant
and inject
the correct
refrigerant
as required.
the system's
balance
pressure 20
minutes later
and convert
the pressure
into the
correspondin
g saturation
temperature.
Compare it
with the
outdoor
ambient
temperature.
If the
difference is
larger than
5°C（9℉）, it
is
exceptional.
6. Exhaust
temperatur
e sensor
failure
——
——
——
Replace the
temperature
sensor or
main board.
7. The
ambient
temperatur
e exceeds
the scope
of
temperatur
e required
for safe
operation.
——
The
outdoor
ambient
temperatur
e exceeds
50°C（122
℉）.
Measure
the ambient
temperatur
e.
——
——
It is a
normal
phenomeno
n caused by
the
protection
function.