Gree GMV MTAC VRF Series, Service Manual

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Gree GMV MTAC VRF for North America
79
8.2 Debugging of Unit
Description of test operation procedures and main board display of ODU.
GMV-12WP/A-T(U)
Description of each stage of debugging progress
—
Debugging code
Code meaning and operation method
Progress
LED
Code Display status
01_Set master
unit
A0 ON
System is not debugged, hold main board’s SW3 button for
5s to start debugging.
01 ON 2s later, next step starts.
02_ Allocate
addresses
02/Ad Display circularly System is allocating addresses. 10s later, display as below:
02/L7 Display circularly
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.
02/oC Display circularly Allocation is finished. 2s later, next step starts.
03_ Confirm
the quantity of
ODU
03/01 Display circularly System is confirming. 1s later, next step starts.
04_ Confirm
the quantity of
IDU
04/00~16 Display circularly
“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:
04/oC Display circularly System has confirmed the quantity. 2s later, next step starts.
00~16/CL Display circularly
“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.
05_ Detect
ODU’s internal
communication
and capacity
ratio
05/C2 Display circularly
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.
05/oC Display circularly
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, then next step
will start 2s later. If the ratio is out of range, unit will display
as below:
05/CH Display circularly
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.
05/CL Display circularly
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.
06_ Detect
outdoor
components
06/error code Display circularly
Outdoor component’s error. Besides “06”, the other blinking
will display the related error code. After errors are
eliminated, system will start next step automatically. If power
is off during troubleshooting, then restart debugging from
progress 01 after power is on.
06/oC Display circularly System detects no error on outdoor component. 10s later,
next step starts.