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Chapter 4.  How This Device Operates
Instantaneous power outage / voltage drop during operation
If an instantaneous power outage or voltage drop occurs while this device is 
operating, the subsequent operation is as follows.
Instantaneous 
power outage
Shorter than 
90 ms
Operation continues.
90 ms or 
longer
Operation continues or restarts from stop, or 
restarts after power-OFF
Instantaneous 
voltage drop (drop 
in power of  50 %)
Shorter than 
100 ms
Operation continues.
100 ms or 
longer
Operation continues or flame failure occurs due to 
voltage drop in the flame detector*
* Because the voltage to the fuel valve also drops, the fuel supply may decrease, causing 
flame failure.
Playback monitor / flame logger
The playback monitor and flame logger functions facilitate maintenance of 
equipment. For details, refer to   Flame Monitor Model AUR355 User’s Manual 
for Communication Functions, No. CP-SP-1453E.