D.C. Inverter Multi-variable Modular
48
Step 15:
progress 11 is “Calculate refrigerant quantity manually”
No need to operate. System will start next progress.
Step 16:
progress 12 is “Confirm debugging startup”
In order to make sure all preparation work is done before startup, this step is designed for user to
confirm the startup again. Operate as below:
If master unit displays as below, system is waiting for confirmation signal.
——
Debugging 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
AP
Blink
Ready for units to start debugging.
If it’s confirmed, press SW7 confirmation button. Unit will display as below and start next
progress.
——
Debugging 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 debugging, system select cooling/heating mode according
to ambient temperature.
A If cooling mode is selected, relevant display is as below:
——
Debugging code
Progress code
Status code
Meaning
progress
LED1
LED2
LED3
Code
Display
status
code
Display
status
Code
Display
status
15_Cooling
debugging
db
Light
15
Light
AC
Light
Debugging is enabled in cooling mode
(debugging mode, auto-selected by
system).
db
Light
15
Light
Error
code
Light
Error occurs during debugging in cooling
mode.
db
Light
15
Light
J0
Light
Error of other modules occurs during
debugging 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.
3s later, 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.
