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Error between AHU-KIT and outdoor unit at the beginning of operation(in tracking)
1) Self check
• Wired remote controller will show the same
error shown in the outdoor unit.
Outdoor unit display
Explanation
Communication error between AHU-KIT and the outdoor unit
Reason
Refer to following self check
In-tracking Error
Do numbers match?
No
Yes
Check the number of AHU-KIT set
up on outdoor unit PBA is equal to actual
number of AHU-KIT installed.
Press the reset key(K3) on the outdoor unit
PBA and check the responding numbers of
AHU-KIT on the display.
Disconnect the two communication cable
from outdoor unit to AHU-KIT and check
the both cables with oscilloscope.
Yes
Are the voltage between the
cables verified as square wave
over DC±0.7?
- 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
Yes
Set the correct number of AHU-KIT on
outdoor unit PBA and press the reset
key(K3) to restart the tracking.
Is there no response on the
display in-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.
Yes
TROUBLESHOOTING
(Continued)
Note
MXD-A16K1X025A_E_31836-1.indd 27
2010-03-12 ｿﾀﾈﾄ 12:43:07
