36
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.
