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Troubleshooting and fault elimination
12 Troubleshooting and fault elimination
Symptoms
No detectable function
Input signal "Drn"
is "low",
but no condensate
discharge
No sensor signal "Sen"
(transistor switched,
Gnd potential)
with covered sensor
Sensor signal "Sen"
(transistor open)
at the empty device
Device blows off
continuously
18
Possible reasons
Supply voltage incorrect
Circuit board defective
External control defective
Feed and/or discharge pipe
blocked or obstructed
Wear and tear
Circuit board defective
Service unit defective
Minimum pressure not reached
Maximum pressure exceeded
Feed pipe without sufficient slope
Cross-section not large enough
Condensate accumulation too high
(surge)
Circuit board defective
Sensor dirty
Wire breakage at the sensor
Circuit board defective
Service unit defective or dirty
Measures
Check the connections and the supply
voltage
Check the circuit board for possible
damage
Replace the circuit board
Check feed and discharge pipe
Check whether or not the valve opens
audibly
Check the circuit board for possible
damage
Replace the circuit board
Check the operating pressure
Install feed pipe with a slope
Check the circuit board for possible
damage
Replace the circuit board
Replace the service unit
Check the circuit board for possible
damage
Replace the circuit board
Replace the service unit
BEKOMAT® 31U IF built-in F
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