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1) Self check
Outdoor unit display
Explanation
When Control-KIT outputs fan operation status signal and the fan feedback
signal stays OPEN for more than 10 seconds.
( AHU-KIT only)
Reason
• Poor AHU fan operation
• Missing or Incorrect circuit system for fan feedback check.
Fan Error
Did you set up the system to
receive the fan feedback?
(Refer to page 14)
Yes
Change the Control-KIT PBA.
No
Set the Install option 05 series SEG21 “0”.
(Disables fan feedback signal.)
Is fan working?
Do you need fan feedback?
No
Connect feedback signal to fan
check terminal on Control-KIT.
Ensure that Install option 05 series
SEG21 “1”.
Yes
Check the AHU fan control.
No
When the AHU fan is
operating, does fan feedback
cable offer SHORT signal?
Re-arrange the Control-KIT circuit again to
output the appropriate fan feedback signal
depending on the fan operation status.
No
Yes
Yes
TROUBLESHOOTING
(Continued)
• Fan feedback check terminal should only receive OPEN/SHORT contact signal without voltage.
When the fan feedback check terminal receives contact signal with voltage may damage the
Control-KIT .
NASA PJT_AHU Kit_MXD-K@@@AN Series_EN_03711A(1).indd 31
2013-01-11 오후 3:20:36
Содержание MXD-K025AN
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