18 | Failures / Errors
5. B Switch off the appliance.
B Check the temperature limiter (STB)
on recuperator.
Ist the circuit open or wrong installed ?
no: -->6.
yes: B Change the temperature limiter (STB) or correct the
installation.
B Switch on the appliance.
-->6.
6. Electronic card is defect. B Switch off the appliance.
B Cut mains supply.
B Change the electronic card.
B Connect to main supply.
B Switch on the appliance.
B END
1) If the air inside not removed/discharged, can be also used the manuel air vent valve in recuparator.
E9 and operating LED is flashing.
Overheat lock-out by temperatur limiters (2 x STB : Flue gas + prim. Heatexchanger). In this case ; Heat demands is
blocked and pump stops 3 minutes later.
Control Step Action
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