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Failure detection system for EC fans (IW-005/006 Only)
IW units includes an EC fans failure detection board (54-1168-00).
EC fans send pulses to the board indicating its status and it detects if an anomaly occurs, indicating it to the PLC.
The board has an LED that informs its status and if a fault occurs, which is the defective fan.
The following table describes the LED states and its corresponding indication:
LED STATE
INDICATION
Off
No power
Continuously Blinking
Standby: The board is waiting for the PLC to turn on the fans
On
The board is monitoring each fan state
1 Blink and a large pause
Failure on Fan 1
2 Blinks and a large pause
Failure on Fan 2
3 Blinks and a large pause
Failure on Fan 3
4 Blinks and a large pause
Failure on Fan 4
5 Blinks and a large pause
Failure on Fan 5
In case of a fauliure, the PLC stops the fans, remaining in a fault state, at which time the LED status of the board must be
checked to determine which fan caused the failure.
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Страница 80: ...76 5276 05 Page 80 of 82 IW 005 Power Electrical Diagram with or without humidifier Ext Digital Comp ...
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