Troubleshooting
Fault messages
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5
5
Troubleshooting
There are two main types of fault: internal and external.
5.1
External faults
The heating EMERGENCY STOP switch has been pressed.
A household fuse (FI protective circuit breaker), a fuse or a motor overload switch has
tripped.
The safety temperature limiter has triggered.
5.2
Internal boiler faults
If a fault has occurred and has not yet been cleared:
- Red status LED
1
blinks.
- A fault message is displayed on the display
2
.
Internally, a distinction is made between a fault and a warning. A fault has the same effect as an
"EMERGENCY STOP" and shuts down the system immediately. A warning, on the other hand,
shuts down the system in a controlled manner.
Fault message list:
See the instruction manual for the Lambdatronic H 3000.
5.2.1
Resetting the safety temperature limiter (STB)
The STB shuts down the boiler at a temperature of 100
°C
(approx.).
After the STB has cooled down it must be reset by hand. Proceed as follows:
Unscrew the cap on the safety temperature limiter
Reset the safety temperature limiter by pressing with a screw-driver
5.2.2
Acknowledging a fault message
Trace and remove the fault and then:
Press the ENTER key
1
Press the START key
2
1
2
1
1
2
