Lennox VEPS075N432K User Manual page 31

DC Inverter Multi VRF System
——
Progress
04/00~16
04_ Confirm the
quantity of IDU
00~16/CL
05_ Detect ODU's
internal
communication
and capacity ratio
06/error code
06_ Detect outdoor
components
07/XX/error
07_ Detect indoor
components
07/XXXX/error
Description of each stage of debugging progress
Debugging code
LED
Code Display status
Display
circularly
Display
04/oC
circularly
Display
circularly
Display
05/C2
circularly
Display
05/oC
circularly
Display
05/CH
circularly
Display
05/CL
circularly
Display
circularly
Display
06/oC
circularly
Display
code circularly
Display
code circularly
Display
07/oC
circularly
Code meaning and operation method
"00~16" displays the quantity of indoor unit. Confirm the
number manually. If the number is not consistent with 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, then 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.
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.
System detects no error on outdoor component. 10s later, next
step starts.
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.
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.
No error on components of IDU. 5s later, next step starts.
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