Error Between Ahu-Kit And Outdoor Unit At The Beginning Of Operation (In Tracking) - Samsung MXD-K025AN Installation Manual

Troubleshooting

Error between AHU-KIT and outdoor unit at the beginning of operation (in tracking)

Outdoor unit display
Explanation Communication error between AHU-KIT and the outdoor unit
Reason Refer to following self check
1 Self check
Check the number of AHU-KIT set up on outdoor unit PBA
is equal to actual number of AHU-KIT installed.
Do numbers match?
Press the reset key(K3) on the outdoor unit PBA and check
the responding numbers of AHU-KIT on the display.
Is there no response on the display in-tracking?
Disconnect the two communication cable from outdoor
unit to AHU-KIT and check the both cables with
Are the voltage between the cables verified as square
- Check the communication cables between the AHU-KIT and outdoor/indoor units.
- When there is no error, connect just one AHU-KIT to check them individually.
- When the error still occurs, change the AHU-KIT PBA
32 English
Yes
Yes
oscilloscope.
Yes
wave over DC±0.7?
Yes
No
Set the correct number of AHU-KIT on outdoor unit PBA
and press the reset key(K3) to restart the tracking.
No
Wait for 2 minutes and find the AHU-KIT with the
communication error. Check if the address on PBA is same
with any others.
- Communication error occurs when the address is
assigned to more than one AHU-KIT. In this case, all the
AHU-KIT sharing one address will show error message.
If the address is correct, check the communication cable
and change the AHU-KIT PBA
No
Check the communication cable and
the connector on outdoor unit and
change the PBA.
NOTE
• Wired remote controller will show the same
error shown in the outdoor unit.