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5 Instructions for Maintenance
5.3 Troubleshooting
on apparently immaculate functioning according to the indicator elements
1 Check the output contact fuse and the contact
– Disconnect the flame scanner from the supply voltage
– Check the normally closed output contact at the 1st clamping point behind the flam
scanner between the brown (BR) and the white (WH) connection wire (avoid low re-
sistance continuity check - fuse 500 mA)
– Connect the flame scanner to the supply voltage
– Check with simulated flame between the brown (BR) and the green (GN) connectio
wire
2 Check the supply voltage
– Connect the flame scanner to the supply voltage
– Check the supply voltage at the 1st clamping point behind the flame scanner betwee
the red and the blue connection wire for compliance with the voltage limits (in particu-
lar the lower limit)
– Repeat test with simulated flame
5.4 Maintenance
5.4.1 General Information
Provisions shall be made to ensure that the light entry port of the flame sensor and the viewing
port on the furnace, where the sensor is fitted, are regularly cleaned, i.e. at regular intervals,
which depend on the operating conditions of the furnace. The compact flame scanner needs
no maintenance. The operation of the flame scanner by physically shutting off the flame
should be incorporated into the maintenance cycle for the device.
NOTICE
If it is necessary to clean the optics of fiber optic flame detectors, special care should be taken
to clean the fiber optic surface. Damage to the surface can result in significant signal loss.
5.4.2 Instructions on Troubleshooting
DANGER!
The flame scanner is a safety device.
Any repair work or other changes to the device shall only be carried out by the manu-
facturer's specialist staff or by some other persons appointed by the manufacturer.
Any other person are not allowed to operate on parts inside the device.
In particular, this concerns the unauthorized exchange of the flame contact fuse.
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