Buderus Logamax plus GB162-80 kW Service Instructions Manual page 49

section 56
[6/c/\| e [3/0/6|
Step 1  Connect a digital pressure gauge, see section 119. Open the gas stop valve, see section 81, and put the boiler
into flue gas test mode, see section 20. End the heat demand in accordance with the flue gas test (section 20),
wait for the LED "Burner operation" to extinguish and then check that burner pressure is still available (gas/air
ratio of -0.02 inch W.C.).
Step 2 Is burner pressure still available (gas/air ratio of -0.02 inch W.C.)?
Step 3  Check the ionization electrode as indicated in section 105.
Step 4 Is the ionization electrode okay?
Step 5 Diagnosis: The ionization electrode is defective. Action: Replace the ionization electrode, see section 103.
Step 6  Close the gas stop valve as indicated in section 74. Remove the digital pressure gauge and close the gas/air ratio
measuring nipple. Open the gas stop valve, see section 81, and put the boiler into operation, see section 20.
End the heat demand in accordance with section 20, wait for the LED "Burner operation" to extinguish and then
check that there is still a voltage on the gas valve, see section 110.
Step 7 Is there still a voltage on the gas valve?
Step 8 Diagnosis: The gas valve is defective. Action: Replace the gas valve, see section 113.
section 57
e
[6/l/\| [2/2/9|
Step 1 Is the heating system propane gas-fired?
Step 2  Contact the gas utility company to check that there is no nitrogen in the new or existing gas tank and the gas
supply pipework.
Step 3 Is there still nitrogen in the new or existing gas tank and the gas supply pipework?
Step 4 Diagnosis: There is nitrogen in the gas tank and the gas supply pipework.
Action: Remove the nitrogen in conjunction with the gas utility company.
Step 5  Check that the device gas stop valve is open as instructed in section 81 and that the main gas stop valve is open.
Step 6 Are both gas stop valves open?
Step 7 Diagnosis: The device gas stop valve and/or the main gas stop valve is/are closed.
Action: Open the device gas stop valve as instructed in section 81 and open the main gas stop valve.
Step 8  Check the static and dynamic gas supply pressures as indicated in section 117.
Step 9 Are the static and dynamic gas supply pressures correct?
Step 10  Check that there is no obstruction in the gas pipe between the device gas stop valve and gas valve.
Step 11 Did you find an obstruction?
Step 12 Diagnosis: There is an obstruction in the gas pipe. Action: Remove the obstruction.
Step 13  Check that there is no obstruction in other parts of the gas pipe.
Step 14 Did you find an obstruction?
Logamax plus GB162-80 kW/100 kW - Subject to modifications resulting from technical improvements!
Locking fault code: Flames (ionization current) have been detected after switching off the
burner (section 1, [23]).
Blocking fault code: Insufficient flame activity (ionization current) was measured during the
burner procedure.
Diagnosis 6
→
Yes: Step 6
→
No: Step 3
→
Yes: Section 66
→
No: Step 5
→
Section 67
→
Yes: Section 66
→
No: Step 8
→
Yes: Step 2
→
No: Step 5
→
Yes: Step 4
→
No: Step 5
→
Section 67
→
Yes: Step 8
→
No: Step 7
→
Section 67
→
Yes: Step 16
→
No: Step 10
→
Yes: Step 12
→
No: Step 13
→
Section 67
→
Yes: Step 15
→
No: Step 24
49