D.C. Inverter Multi-variable Modular
42
Description of each stage of debugging progress
——
Debugging code
Progress code
Status code
Meaning
progress
LED1
LED2
LED3
Code
Display
status
code
Display
status
Code
Display
status
02_Allocate
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 randomly.
db
light
02
light
OC
light
Allocation is finished. Start next progress.
03_Confirm the
quantity of modules
db
light
03
light
01~04
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 progress.
04_Confirm the
quantity of IDUs
db
light
04
light
01~80
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 progress.
05_Detect internal
communication
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 “high proportion of rated capacity”.
db
light
05
light
CL
light
IDU/ODU “low proportion of rated capacity”.
db
light
05
light
OC
light
Detection is finished. Start next progress.
06_Detect 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
progress.
07_Detect 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.
3s later, 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.
db
light
07
light
OC
light
No error in indoor components. Start next
progress.
08_Confirm
preheated
compressor
db
light
08
light
U0
light
Preheat time for compressor is less than 8h.
db
light
08
light
OC
light
Preheat time for compressor is 8h. Start next
progress.
09_Refrigerant
judgments before
startup
db
light
09
light
U4
light
System refrigerant is not enough. System
downtime equilibrium pressure is lower than
0.3MPa.
db
light
09
light
OC
light
System refrigerant is normal. Start next
progress.
10_Status
judgments of
outdoor valves
before startup
db
light
10
light
ON
light
Outdoor valves are being turned on.
db
light
10
light
U6
light
Outdoor valves are not fully turned on.
db
light
10
light
OC
light
Outdoor valves are turned on normally.
Description of each stage of debugging progress
