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7 Instructions on Commissioning and Maintenance
7.3 Troubleshooting
on apparently immaculate functioning according to the indicator elements
1 Check the output contact fuse and the contact
– Disconnect the flame detector from the supply voltage
– Check the normally closed output contact at the 1st clamping point behind the flame
detector between the brown (BR) and the white (WH) connection wire (avoid low re-
sistance continuity check - fuse 500 mA)
– Connect the flame detector to the supply voltage
– Check with simulated flame between the brown (BR) and the green (GN) connection
wire
2 Check the supply voltage
– Connect the flame detector to the supply voltage
– Check the supply voltage at the 1st clamping point behind the flame detector between
the red and the blue connection wire for compliance with the voltage limits (in particu-
lar the lower limit)
– Repeat test with simulated flame
– If the supply voltage is too low, this may be due to excessive lengths of the supply lines
which core sections are too small, apart from other faults.
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