Gree MULTI VRF SYSTEM II GMV-120WL/A-T

52
DC Inverter Multi VRF System II
Service Manual
04_Quantity
conrmation of
indoor unit
db ON 04 ON 01~80 Flash
LED3 displays quantity of indoor unit.
The quanity of indoor unit shall be
conrmed by perform. If the actural
quantity of indoor unit is different from
the displayed quantity, cut off the power
for indoor unit and outdoor unit. Check
whether the communication wire for
indoor unit is normal. After that, put
through the power and start debugging
from step 01. If the quantity of indoor
unit is correct, press SW7 button on
main board to conrm it. The display is
as below after conrmation:
db ON 04 ON OC ON
Conration for the quantity of indoor unit
of nished. 2s later, it will enter into the
next step automatically.
05_Internal
communication
and capacity
ratio inspection
for between
indoor unit and
outdoor unit
db ON 05 ON C2 ON
Communication between main
board of outdoor unit and drive is
abnormal. Please check whether
the communication wire connecting
main board of outdoor unit and drive
board is normal? It will enter into the
next operation after troubleshooting.
If it needs to cut off the power during
troubleshooting process, start
the debugging from step 01 after
energization.
db ON 05 ON OC ON
Normal communication between main
board of outdoor unit and drive. It will
displays for 2s by the left method. With
this 2s, the capacity ratio for indoor
unit and outdoor unit will be detected
automatically. If it hasn’t exceeded the
capacity ratio range, it will enter into
next step determination after 2s; if it has
exceed the capactiry ration, display is as
below:
db ON 05 ON CH ON
The rated capacity ratio for indoor unit is
high. Change the combination for indoor
unit and outdoor unit to let their capacity
ration is within the reasonable range.
Perfrom the debugging again from step
01.
db ON 05 ON CL ON
The rated capacity ratio for indoor unit is
low. Change the combination for indoor
unit and outdoor unit to let their capacity
ration is within the reasonable range.
Perfrom the debugging again from step
01.
06_Parts
detection for
outdoor unit
db ON 06 ON
Corresponding error
code
ON
Malfunction of parts for outdoor
unit. LED3 displays corresponding
malfunction code. After troubleshooting,
it will enter into the next step
determination automatically. If it needs
to cut off the power for the outdoor unit
during troubleshooting process, perform
the debugging again from step 01 after
energization.
db ON 06 ON OC ON
When there’s no malfunction of parts for
outdoor unit, it will enter into the next
step determination automatically after
10s.