Gree GMV-140WL/A-T User Manual page 24

DC Inverter Multi VRF System User Manual
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04_ Confirm
the quantity of
IDU
db
db
05_ Detect
ODU's internal
db
communication
and capacity
ratio
db
db
db
06_ Detect
outdoor
components
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db
07_ Detect
indoor
components
db
db
08_ Confirm
preheated
compressor
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09_
Refrigerant
db
judgments
before startup
On 04 On
On 04 On
On 05 On
On 05 On
On 05 On
On 05 On
On 06 On
On 06 On
On 07 On
On 07 On
On 08 On
On 08 On
On 09 On
LED3 displays the quantity of indoor unit. Confirm
the number manually. If the number is not
consistent the display one, cut off power of IDU
and ODU and check whether communication
01~80 Blink wire of IDU is correctly connected. After the
check, connect power and start debugging from
progress 01. If the number is then correct, press
main board's SW7 button to confirm. Then the
display is as below:
System has confirmed the quantity. 2s later, next
OC On
step starts.
Communication between master ODU and driver
has error. Check the communication connection
of ODU's main board and drive board. When the
C2 On
error is eliminated, start next step. If power is off
during troubleshooting, then restart debugging from
progress 01 after power is on.
Communication of master ODU and driver is
normal. Unit will display as in the left for 2s and
detect the capacity ratio of IDU and ODU. If the
OC On
ratio is within range, than next step will start 2s
later. If the ratio is out of range, unit will display as
below:
Rated capacity ratio of IDU is too high. Change the
combination way of IDU and ODU to make the
CH On
ratio within range. And restart debugging from
progress 01.
Rated capacity ratio of IDU is too low. Change the
combination way of IDU and ODU to make the
CL On
ratio within range. And restart debugging from
progress 01.
Outdoor component's error. LED3 will display the
related error code. After errors are eliminated,
error
On system will start next step automatically. If power is
code
off during troubleshooting, then restart debugging
from progress 01 after power is on.
System detects no error on outdoor component.
OC On
10s later, next step starts.
System detects error on indoor components. XXXX
means the project code of IDU with error. 3s later,
related error code will be showed. For instance, if
no.1 IDU has d6 and d7 errors, then the LED3
XXXX/
digital
Error On
00,01,d5,d6,07,92,d6,d7 every 2s. After errors are
code
eliminated,
automatically. If power is off during troubleshooting,
then restart debugging from progress 01 after
power is on.
No error on components of IDU. 2s later, next step
OC On
starts.
Preheat time for compressor is less than 8 hours.
Display will be as in the left until the preheat time
reaches 8 hours. Press main board's SW7 button
UO On to confirm manually that the preheat time has
reached 8 hours. Then start next step. (Note:
Compressor may get damaged if it is started
without 8 hours of preheat time)
Compressor has been preheated for 8 hours. 2s
OC On
later, next step starts.
System is lack of refrigerant and display will be as
in the left. Please cut off power of IDU and ODU
and check if there is leakage on pipeline. Solve
the leakage problem and complement refrigerant
U4 On
into the unit. Then connect power and restart
debugging from progress 01. (Note: Before
re-charging refrigerant, unit must be power off in
case system starts progress 10 automatically.)
21
tube will show
system will start
circularly
next step