Buderus Logamax plus GB162-80 kW Service Instructions Manual page 50

6 Diagnosis
section 57 (continued)
Step 15 Diagnosis: There is an obstruction in the gas pipe. Action: Remove the obstruction.
Step 16 Has the gas supply pipe (and the gas tank, if relevant) been purged?
Step 17 Diagnosis: The gas supply pipe (and the gas tank, if relevant) has not been purged.
Action: Purge the gas supply pipe (and the gas tank, if relevant), see section 118.
Step 18  Check the plug-and-socket connection of the gas valve, see section 109.
Step 19 Is the plug-and-socket connection okay?
Step 20 Diagnosis: The plug-and-socket connection has come loose.
Action: Replace the plug-and-socket connection on the gas valve, see section 109.
Step 21  Check the gas valve power supply cord as indicated in section 111.
Step 22 Is the power supply cord okay?
Step 23 Diagnosis: The wire harness is defective. Action: Replace the wire harness or the affected part.
Step 24  Check that the overall gas supply network is of sufficient capacity.
Step 25 Is the overall gas supply network of sufficient capacity?
Step 26 Diagnosis: The gas supply network is not of sufficient capacity.
Action: Increase the capacity of the gas supply network.
Step 27 Diagnosis: The cause of the fault is to be found outside the boiler and the gas pipe work.
The gas supply pressure regulator may be defective. Action: Contact the gas utility company.
Step 28  Adjust the gas/air ratio, see section 119.
Step 29 Is the gas/air ratio okay?
Step 30 Diagnosis: The gas/air ratio setting is not okay. Action: Adjust the gas/air ratio, see section 119.
Step 31  Check that the correct orifice has been installed, see section 119 and 135.
Step 32 Has the correct orifice been installed?
Step 33 Diagnosis: The wrong orifice has been installed. Action: Install the correct orifice, see section 119 and 135.
Step 34  Check the following elements for contamination, damage and/or incorrect installation:
- Siphon, section 127;
- Air suction tube, section 1, [12];
- Seal and connection between venturi pipe and fan unit;
- Venturi pipe, see section 86;
- Orifice, see section 113;
- Fan unit;
- Seal and connection between fan unit and burner;
- Burner, section 126;
- Heat exchanger;
- Flue gas outlet and air inlet system;
- Ground wire insulation, see section 108.
Step 35 Are the above-mentioned components clean, free of damage and/or correctly installed?
Step 36 Diagnosis: The above components are dirty, damaged or not correctly installed.
Action: Clean, replace and/or re-install the relevant components.
Step 37  Check the ionization current as indicated in section 104.
50 Logamax plus GB162-80 kW/100 kW - Subject to modifications resulting from technical improvements!
→
Section 67
→
Yes: Step 18
→
No: Step 17
→
Section 67
→
Yes: Step 21
→
No: Step 20
→
Section 67
→
Yes: Step 28
→
No: Step 23
→
Section 67
→
Yes: Step 27
→
No: Step 26
→
Section 67
→
Section 67
→
Yes: Step 31
→
No: Step 30
→
Section 67
→
Yes: Step 34
→
No: Step 33
→
Section 67
→
Yes: Step 37
→
No: Step 36
→
Section 67