Buderus Logamax plus GB162-80 kW Service Instructions Manual page 48

6 Diagnosis
section 54 (continued)
Step 49  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 50 Are the above-mentioned components clean, free of damage and/or correctly installed?
Step 51 Diagnosis: The above components are dirty, damaged or not correctly installed.
Action: Clean, replace and/or re-install the relevant components.
Step 52  Check the ionization current as indicated in section 104.
Step 53 Is the ionization current okay?
Step 54  Check the plug-and-socket connection between the ionization electrode and wire harness as instructed in
section 104.
Step 55 Is the plug-and-socket connection okay?
Step 56 Diagnosis: The plug-and-socket connection has come loose.
Action: Connect the plug-and-socket connection correctly.
Step 57  Check the cable of the ionization electrode as indicated in section 106.
Step 58 Is the wiring okay?
Step 59 Diagnosis: The wire harness is defective. Action: Replace the wire harness or the affected part.
Step 60  Check the ionization electrode as indicated in section 105 and section 107.
Step 61 Is the ionization electrode okay?
Step 62 Diagnosis: The ionization electrode is defective. Action: Replace the ionization electrode, see section 103.
Step 63  Temporarily remove the combustion air supply and exhaust gas outlet connections from the top of the device.
Put the device into operation as instructed in section 20.
Note: Ensure that there is sufficient air supply during this test. Check that the fault has been rectified.
Step 64 Has the fault been remedied?
Step 65 Diagnosis: The cause of the fault is to be found in the air inlet/flue gas outlet system.
Action: Switch off the device and remedy the fault.
section 55
[6/c/\| e [2/2/8|
Step 1  Check the ionization electrode as indicated in section 105.
Step 2 Is the ionization electrode okay?
Step 3 Diagnosis: The ionization electrode is defective. Action: Replace the ionization electrode, see section 103.
48
Locking fault code: Flames (ionization current) were measured after a heat demand occurred,
but before opening the gas valve (section 1, [21]).
Logamax plus GB162-80 kW/100 kW - Subject to modifications resulting from technical improvements!
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Yes: Step 52
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Section 67
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Section 67
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Section 67
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Section 67
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No: Section 66
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Section 67
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Yes: Section 66
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Section 67