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Alarm 2120

1/21/2011 5:49 PM	Rate (0)
ŠΜS Gold Member Joined: 6/7/2010 Last visit: 7/9/2024 Posts: 571 Rating: (37)	Dear All, In 840D system,2120 NCK Fan alarm type %1 alarm is appearing in the screen. DOCON CD says that ,to check the NCU box fan. I checked the fan, its working fine.Is there any thing more to check it….
	Regards, ŠΜS
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1/21/2011 7:13 PM	Rate (0)
Ekalavya Posts: 2964 Rating: (485)	Hello, Could you check the signals fron NC to PLC (DB10) if your using it... >DB10.DBX109.6 =>Air temperature alarm Speed monitoring of the 24 V DC fan used to cool the module has responded. Alarm 2120"NCK fan alarm" is output. When a temperature or fan error responds, a relay contact (terminal 5.1, 5.2 or 5.1, 5.3) in the infeed/regenerative feedback unit is activated Corrective Measures: Replace the fan and/or ensure that additional ventilation is provided. check it out.... Regards, Ekalavya
Ekalavya Posts: 2964 Rating: (485)
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1/22/2011 1:20 PM	Rate (0)
ŠΜS Gold Member Joined: 6/7/2010 Last visit: 7/9/2024 Posts: 571 Rating: (37)	Thanks Ekalavya, Proble solved.The problem was in the fan only, some times it doesn’t rotates.
	Regards, ŠΜS
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