DC Inverter Multi VRF System User Manual
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Then press SW6 on the master unit to return to the previous step.
If then no motion is taken to the master unit for 5min, unit will exit and resume displaying the
current status.
(If this button is pressed when function is being set, system will return to the previous step. If
SW6 is pressed when setting is finished, system will resume displaying the current operation status.)
Default setting is “nA” cooling and heating type.
Level B—IDU Mode Auto Control
When Level A is disabled or outdoor unit is set to be cooling and heating type, the operation
mode within one system depends on the master-salve setting of indoor units.
8.3
Forced Defrosting
This function can only be set when outdoor compressor is running.
Upon entering this function, main board of outdoor unit will display as below:
LED1
LED2
LED3
Function code
Display
Current progress/mode
Display
Current status
Display
n3
On
00
Blink
00
Blink
Press SW7 to confirm. When system enters this function, main board of outdoor unit will display
as below:
LED1
LED2
LED3
Function code
Display
Current progress/mode
Display
Current status
Display
n3
On
00
On
00
On
Then unit will be in compulsory defrosting mode. Once unit is under compulsory defrosting, this
mode can only be stopped when requirements for exit are met.
8.4
Restore Factory Defaults
(1) If you want to restore factory defaults, hold SW8 button on the main board of ODU for more
than 10s, then all LEDs will blink for 3s. Main board will cancel all setting, including the IP
addresses and project codes of IDU and ODU. The mark for finished debugging is “0”.
(2) If you want to restore factory defaults and don’t need project debugging, then hold SW3 and
SW8 on the main board of ODU for more than 10s, then all LEDs will blink for 5s. All settings
are cleared out, including the IP addresses and project codes of IDU and ODU. The mark for
finished debugging remains the same.
(3) When you only want to restore the default functions, hold SW5 and SW8 button for more than
10s, then all LED will blink for 7s. All function settings are cleared out, but IDU and ODU’s
project codes and the mark for finished debugging remain the same.
8.5
Static Pressure Function
If ODU’s installation area is not convenient for releasing air and users do not have strict
requirements for ODU noise, this function can be set to satisfy the heat exchange of ODU.
Before power on, set codes of SA6 of main board. The relevant static pressure is:
SA6 Code setting SA6
Static pressure
(Pa)
DIP1
DIP2
0
0
0
1
0
20
Note: code of number side is “1”; default code of SA6 is “00”.
