DC Inverter Multi VRF System User Manual
25
Debugging
U
Setting of
main IDU is
successful
Wrong button-
dial
Charging of
refrigerant is
invalid
C
Malfunction of
lack of main
control unit
Rated capacity
is too low
Malfunction of
multiple main
control units
Malfunction of
multiple main
wired controllers
Malfunction of
multiple main
wired controllers
Status
A
Cooling
Charging
refrigerant
automatically
Charging
refrigerant
manually
Fan
Alarm for
cleaning filter
Debugging
confirmation for
startup of unit
n Cooling only unit
Negative sign
code
Fan model
Content symbol
Division symbol
U
b
d
n
y
Debugging C
Communication
malfunction
between IDU and
the receiving lamp
plate
Overflow distribution
of IP address
Status
A
Long-distance
emergency stop
Emergency stop of
operation
Limit operation
8 Function Setting of Outdoor Unit
When debugging is finished, press SW3 on the master unit and unit will be ready for function
setting. Default display of outdoor unit’s main board is as below:
LED1
LED2
LED3
Function code
Display
Current progress
Display
Current status
Display
A7
Blink
00
Blink
00
Blink
Then press SW1 button(▲) and SW2 button(▼) on the master unit to switch function codes of
LED1 to select relevant functions.
Function setting includes: outdoor silent mode setting (A7), heating and cooling function setting
(A6), compulsory defrosting (n3).
After selecting relevant functions, press SW7 to confirm and start setting this function. Main board
of outdoor unit will display as below:
LED1
LED2
LED3
Function code
Display
Current progress
Display
Current status
Display
A7
On
00
Blink
oC
Blink
A6
On
CH
Blink
CH
Blink
n3
On
35
Blink
oC
Blink
8.1
ODU Quiet Function
This function is suitable for projects that have strict requirements for noise. It includes two modes:
smart night silent mode, compulsory silent mode.
When unit enters function setting, main board of outdoor unit will display as below:
LED1
LED2
LED3
Function code
Display
Current progress
Display
Current status
Display
A7
On
00
Blink
oC
Blink
