Lennox VEP Series, Installation & Operation Instructions

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(6) Description of each stage of Commissioning Cycle progress:
Description of each stage of Commissioning Cycle progress
——
Cycle
code
Progress
code
Status code
Meaning
progress
LED1 LED2 LED3
Code Display
status code
Display
status Code
Display
status
01_Set up
master ODU
db light 01 light A0 light System is not Commissioned
db light 01 light CC light System doesn’t have master unit.
Reset master unit.
db light 01 light CF light More than 2 master units are set.
Reset master unit.
db light 01 light OC light Master unit is successfully set.
Start next step .
02_Allocate
IDU addresses
db light 02 light Ad blink System is allocating addresses.
db light 02 light L7 blink
Master IDU is not set. Please set master IDU.
If it’s not set in 1min, system will set the
master IDU automatically .
db light 02 light OC light Allocation is finished. Start next step .
03_Confirm
the quantity of
ODU's
db light 03 light 01~0
4
blink LED3 displays the quantity of modules.
Confirm the number manually.
db light 03 light OC light System has confirmed the quantity of
modules. Start next step .
04_Confirm
the quantity of
IDU ' s
db light 04 light 01~8
0
blink LED3 displays the quantity of IDUs.
Confirm the number manually.
db light 04 light OC light System has confirmed the quantity of IDUs.
Start next step .
05_ Check
internal
ODU commu -
n ication
issues
db light 05 light C2 light
System detects “driven communication error
between master unit and inverter
compressor”.
db light 05 light C3 light System detects “driven communication error
between master unit and inverter fan”.
db light 05 light CH light IDU/ODU “ Diversity exceeds 135%"
db light 05 light CL light IDU/ODU “ Diversity lower than 50%"
db light 05 light OC light Detection is finished. Start next step .
06_ Check
outdoor
components
db light 06 light Error
code light System detects error in outdoor components.
db light 06 light OC light No error in outdoor components.
Start next step .
07_ Check
indoor
components
db light 07 light
XXXX
/Error
code
light
System detects error in indoor components.
XXXX is the project no. of the faulted IDU.
After 3s, relevant error code is displayed.
For example, IDU no. 100 has d5 error, then
LED3 displays like this: 01 (2s later) 00 (2s
later) d5, and repeat again.
Lennox VRF Unit