Lennox VEP034N432US - Test Operation and Debugging Procedures

DC Inverter Multi VRF System
27
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
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.
05_ Detect
ODU’s internal
communication
and capacity
ratio
db On 05 On C2 On
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.
db On 05 On OC 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.
db On 05 On CH On
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.
db On 05 On CL On
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
db On 06 On
error
code
On
Outdoor component’s error. LED3
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.