10 Troubleshooting
34 Installation and maintenance instructions ecoTEC plus 0020134823_07
Overview of fault codes (→ Page 43)
10.5 Resetting the fault memory
▶ To delete the entire fault list, press (Delete, OK)
twice.
10.6 Performing diagnostics
▶ You can use the function menu (→ Page 29) to actuate
and test individual components of the product in the fault
diagnostics.
10.7 Using check programmes
You can also use check programmes (→ Page 20) for
troubleshooting.
10.8 Resetting parameters to factory settings
▶ To reset all parameters simultaneously to the default
settings, set D.096 to 1.
10.9 Preparing the repair work
1. Decommission the product.
2. Disconnect the product from the power mains.
3. Remove the front casing.
4. Close the gas isolator cock.
5. Close the service valves in the heating flow and in the
heating return.
6. Close the service valve in the cold water pipe.
7. Drain the product if you want to replace water-bearing
components of the product.
8. Make sure that water does not drip on live components
(e.g. the electronics box).
9. Use only new seals.
10.10 Replacing defective components
10.10.1 Replacing the gas valve assembly
2
2
806/5-5
1006/5-5
1206/5-5
1
1
1. Remove the gas pipe (1) from the gas valve assembly.
2. Unscrew the screws (2) from the fan and remove the
gas valve assembly from the fan.
3. Replace the defective component.
4. Install the gas valve assembly and the fan in the same
position as before. Use new seals for this.
5. Tighten the screws (2) in a cross-wise pattern.
Condition: Applies for 80 kW
– Torque: 5.5 Nm
Condition: Applies for 100 kW and 120 kW
– Torque: 2 Nm
6. First, screw the gas pipe loosely onto the gas valve
assembly. Only after completing the installation work
should you tighten the screws for the flange fastening
on the gas valve assembly.
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