Bosch Condens 2000 W, Руководство по обслуживанию

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12 | Failures / Errors
B3 / d5
and operating LED is flashing
.
Short circuit / failure in water level switch in recuperator (condens heat exchanger).
Control Step Action
1. Check the siphon line.
Is there any blockage ?
yes: B Remove the blockage.
B
Switch on the appliance.
B3 / d5 failure still exist? -->2
no: -->2.
2. Check the water level switch.
Is the resistance lower 300 kOhm ?
yes: B Accumulated water in recuperaotr or switch contacts
are wet.
B It can be blockage at recuperator drain. Correct it.
B
Is the siphon connection adapter in right position. It
should be in vertical position.
B
Leakage in water level switch ?. If yes, change it.
B3 / d5 failure still exist? -->3.
no:
B
Short circuit in connection cable. If necessary, change
it.
B3 / d5 failure still exist? -->3.
3. Electronic card is defect. B Notice the changed parameters.
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 Adjust again according noticed parameters.