Diagnosis - Buderus Logamax plus GB162-80 kW Service Instructions Manual

6

Diagnosis

6 Diagnosis
section 30 Diagnosis
You can find a further explanation of the diagnosis in section 6, chapter 1 on page 6.
section 31
No indication on the display of the BC10 (section 1, [4]).
Step 1 Does the boiler work normally?
Step 2.  Check that there is 7.8 to 15.2 VDC on both contacts 1 and 2 of the connector between the BC10 and the bottom
plate of the BC10, see section 124 and section 131.
Step 3 Is there a voltage?
Step 4  Check the contact between the BC10 (section 1,[4]) and its slot by pushing on the BC10.
Step 5 Is there any indication on the BC10 display within a few minutes?
Step 6 Diagnosis: There is insufficient contact between the BC10 (section 1, [4]) and its slot.
Action: replace BC10 and/or its slot.
Step 7 Diagnosis: The control panel BC10 is out of order.
Action: Replace BC10. See the Installation and servicing instructions of the BC10.
Step 8  Check the corresponding component of the wire harness, see section 131.
Step 9 Is the wire harness free of damage?
Step 10 Diagnosis: The wire harness is defective. Action: Replace the wire harness or the affected part.
Step 11  Check that the plug is in the grounded socket.
Step 12 Is the plug in the grounded socket?
Step 13 Diagnosis: The plug is not in the grounded socket.
Action: Insert the plug into the grounded socket, see section 79.
Step 14  Check that the main power switch is in position "1" as indicated in section 80.
Step 15 Is the main power switch in position "1" (On)?
Step 16 Diagnosis: The main power switch is not in position"1" (On).
Action: Turn the main power switch in position "1" (ON), see section 80.
Step 17  Is there 120 VAC on the grounded socket?
Step 18 Is there 120 VAC on the grounded socket?
Step 19 Diagnosis: There is not 120 VAC on the grounded socket.
Action: Remedy the problem in the electrical system.
Step 20  Measure the resistance of the 120 VAC power supply cable.
Step 21 Is the resistance of the 120 VAC power supply cable within the specified limits?
Step 22 Diagnosis: The wire harness is defective. Action: Replace the wire harness or the affected part.
Step 23  Test the fuse on the rear of the UBA 3 using a multimeter, see section 82.
Step 24 Is the fuse working correctly?
30 Logamax plus GB162-80 kW/100 kW - Subject to modifications resulting from technical improvements!
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Yes: Step 2
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Section 67
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Section 67
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Yes: Section 66
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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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