Gree GMV-60WL/C-T Owner's Manual page 25

(9) Before test operation, make sure unit is power on and compressor has been preheated for
more than 8 hours. Touch the unit to check whether it's normally preheated. If yes, start test
operation. Otherwise, compressor might be damaged.
5.2.2 Test Operation and Debugging
Description of test operation procedures and main board display of ODU
—
Progress
A0
01_Set master unit
01
02/Ad
02_ Allocate
02/L7
addresses
02/oC
03_ Confirm the
03/01
quantity of ODU
04/00～16
04_ Confirm the
quantity of IDU
04/oC
00～16/CL
05/C2
05_ Detect ODU's
05/oC
internal
communication and
capacity ratio
05/CH
05/CL
Description of each stage of debugging progress
Debugging code
LED
Code Display status
ON
ON
Display
circularly
Display
circularly
Display
circularly
Display
circularly
Display
circularly
Display
circularly
Display
circularly
Display
circularly
Display
circularly
Display
circularly
Display
circularly
Code meaning and operation method
System is not debugged, hold main board's SW3 button
for 5s to start debugging.
2s later, next step starts.
System is allocating addresses. 10s later, display as
below:
No master indoor unit. Display will be on for 1min, during
which master IDU can be set manually. If not, system will
set the unit with minimum IP address as the master IDU.
Allocation is finished. 2s later, next step starts.
System is confirming. 1s later, next step starts.
"00~16" 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 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 SW3 button to confirm. Then
the display is as below.
System has confirmed the quantity. 2s later, next step
starts.
"00~16" displays the quantity of indoor unit identified by
the system. "CL" means the amount of indoor unit is very
little (amount of indoor unit<2), at this moment, all
buttons are invalid, the system cannot enter into the next
judgment.
Communication between master ODU and driver has
error. Check the communication connection of ODU's
main board and drive board. When the 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 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 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 ratio
within range. And restart debugging from progress 01.
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DC Inverter Multi VRF System