57
If it’s confirmed, press SW7 confirmation button. Unit will display as below and start next
progress.
——
Cycle
code
Progress code Status code
Meaning
progress
LED1
LED2
LED3
Code Display
status code
Display
status Code
Display
status
12_Status
judgments of
outdoor valves
before startup
db
Light
12
Light
AE
Light Manual calculation of refrigerant
quantity is set up.
Step 17: after unit is confirmed to start
Test Run
, system select cooling/heating mode
according to ambient temperature.
A If cooling mode is selected, relevant display is as below:
——
Cycle
code
Progress code
Status code
Meaning
progress
LED1
LED2
LED3
Code Display
status code
Display
status
Code
Display
status
15_Cooling
Test Run
db
Light
15
Light
AC
Light
Test Run
is enabled in cooling
mode (
Run
mode, auto-selected
by system).
db
Light
15
Light
Error
code
Light Error occurs during
Test Run
in
cooling mode.
db
Light
15
Light
J0
Light Error of other modules occurs during
Test Run
in cooling mode.
db
Light
15
Light
U9
Light Outdoor pipeline and valves are not
normal.
db
Light
15
Light
XXXX/U8 Light
System detects error in indoor
pipeline. XXXX is the project no. of
the faulted IDU.
After
3s, error code
U8 is displayed. For example, IDU
no. 100 has U8 error, then LED3
displays like this: 01 (2s later) 00 (2s
later) U8, and repeat again.
Lennox
VRF Unit
