DC Inverter Multi VRF System
30
Description of each stage of debugging progress
——
Debugging code
Code meaning and operation method
Progress
LED
Code
Display status
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, than 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.
07_ Detect indoor
components
07/XX/error
code
Display
circularly
System detects error on indoor components. XX means the
project code of IDU with error, e.g. no.1 IDU has d5 and d6
errors, meanwhile no.3 IDU displays error d6 and d7, then
the nixie tube will display “07”, “01”, “d5”, “d6”and “03”
circularly. 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.
07/XXXX/err
or code
Display
circularly
If errors occur in IDU which the project code is
≥ 3
-digit
number, then it will display the 2 big digits of project code first,
then the 2 small digits, finally the error code, e.g.: L1 error
occurs in no.101 IDU, then the nixie tube will display “01”,“01”
and “L1” circularly. Display method is the same for several
IDUs with multiple errors.
07/oC
Display
circularly
No error on components of IDU. 5s later, next step starts.
