Bosch Condens 2000 W - Page 17

Failures / Errors | 17
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
1. Is the system pressure between 1 - 2
bar?
yes: -->2.
no: B Fill water in sysytem.
B Bleed the system
1)
.
B Press RESET button and restart again.
E9 failure still exist? -->2.
2. Is the circulation pump blocked ? yes: B Eliminate the blockage (turn the shaft).
If not succesful :
B Switch off the appliance.
B Cut mains supply.
B Drain the water from appliance.
B Change the pump.
B Fill with water and bleed the system again.
B Connect to main supply.
B Switch on the appliance.
B Press RESET button and restart again.
E9 failure still exist? -->3.
no: -->3.
3. Check the flue gas pipe line.
Is there any blockage ?
yes: B Check the flue gas pipe and remove the blockage.
B Switch on the appliance.
B Press RESET button and restart again.
E9 failure still exist? -->4.
no: -->4.
4. Check the recuperator.
Is there any blockage?
yes: B Clean the recuperator. Replace if necessary.
B Switch on the appliance.
B Press RESET button and restart again.
E9 failure still exist? -->5.
no: -->5.