Gree GMV5E Series Service Manual page 149

GREE
Feedback
Exception
from user
2.2.4 Exception Analyzing and Troubleshooting
2.2.4.1 "A0" Unit debug status
Error display: ODU mainboard, IDU wired controller and IDU receive light board will
display
Error judgment condition and method:
This code is status code. When the engineering debugging is not completed, the unit will display this
code, at this time, the unit cannot startup for operation.
Possible reason：——
Troubleshooting: status code, no troubleshooting.
2.2.4.2 "A2" Refrigerant recovery operation status
Error display: ODU mainboard, IDU wired controller and IDU receive light board will
display
Error judgment condition and method:
This code is status code, which means the system has entered into refrigerant recovery status, and
the unit will start up for operation automatically.
Possible reason：——
Troubleshooting: status code, no troubleshooting.
GMV5E DC INVERTER VRF UNITS SERVICE MANUAL
Primary reason
Confirmation
Description
method
7. Not
Other
enough
reasons
refrigerant
Possible reasons
Secondary reason
Confirmation
Description
method
performanc
e of the unit.
4.2 The air
intake and
return inlet
of the IDU
are too
Check the
close to
distance.
each other,
causing
poor heat
exchange of
the unit.
Incorrect
quantity of
——
refrigerant
is injected.
145
Tertiary reason
Confirmation
Description
method
—— ——
—— ——
Solution
Re-design the
airflow
distribution.
Check the
necessary
amount of
refrigerant and
inject
refrigerant
slowly via the
stop valve of
the
low-pressure
air pipe.