DC Inverter Multi VRF System
26
Service Manual.
(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
GMV-80WL/A-T, GMV-100WL/A-T, GMV-121WL/A-T, GMV-80WL/C-T, GMV-100WL/C-T,
GMV-121WL/C-T, GMV-120WL/C-T, GMV-140WL/C-T, GMV-160WL/C-T, GMV-120WL/C-X,
GMV-140WL/C-X, GMV-160WL/C-X.
Description of each stage of debugging progress
——
Debugging code
Progress code
Status code
Code meaning and operation
method
Progress
LED1
LED2
LED3
Code
Display
status
Code
Display
status
Code
Display
status
01_ Set master
unit
00
ON
OF/AC
/AH
ON
A0
ON
System is not debugged.
db
On
01
On
OC
On
Hold main board’s SW7 button for 5s
to start debugging. Main board will
display as said in the left. 2s later,
next step starts.
02_ Allocate
addresses
db
On
02
On
Ad
Blink
System is allocating addresses. 10s
later, display as below.
db
On
02
On
L7
Blink
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.
db
On
02
On
OC
On
Allocation is finished. 2s later, next
step starts.
03_ Confirm the
quantity of ODU
db
On
03
On
01
Blink
System is confirming. 1s later, next
step starts.
db
On
03
On
OC
On
System finishes confirmation. 2s
later, next step starts.
04_ Confirm the
quantity of IDU
db
On
04
On
01~80
Blink
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 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.
db
On
04
On
OC
On
System has confirmed the quantity.
2s later, next step starts.
Summary of Contents for GMV-120WL/C-X
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