Gree GMV-400WM/B-X - Page 149

GMV5 DC INVERTER VRF UNITS SERVICE MANUAL
146
6.2.4
The
main
board of
the fan's
motor is
damage
d.
Other
reasons
Replace
the motor.
7. Too
much
refrigeran
t
Other
reasons
Incorrect
quantity
of
refrigeran
t is
injected.
——
——
——
Check the
necessary
amount of
refrigerant
and
discharge
unneeded
refrigerant
slowly via
the stop
valve of
the fluid
pipe.
JL
Low
high
pressur
e
protecti
on
1. The
ambient
temperat
ure
exceeds
the
range.
——
1.1 The
outdoor
ambient
temperat
ure in the
cooling
mode is
lower
than
-10°C .
Measure the
outdoor
ambient
temperature.
——
——
It is a
normal
phenome
non
caused by
the
protection
function.
1.2 The
indoor
ambient
temperat
ure in the
heating
mode is
lower
than 5°C .
Measure the
temperature
of the unit's
return air.
——
——
It is a
normal
phenome
non
caused by
the
protection
function.
2. Not
enough
refrigeran
t
——
Locate the
leak and
inject
refrigerant
.
Fa
ult
cod
e
Fault
Possible reasons
Solution
Primary reason
Secondary reason
Tertiary reason
Descripti
on
Confirma
tion
method
Descripti
on
Confirmation
method
Descriptio
n
Confirma
tion
method
E3
Low-pres
sure
Protectio
n
1. The
stop
valve of
the ODU
is not
fully
——
——
——
——
Manual
check
Fully
open the
stop
valve.