Buderus LOGANO PLUS GB312 Installation Instructions Manual page 61

Display
1)
Type code Fault code
L EE 601
L EE 612
L EE 626
Table 22 Fault messages
1) V = locking; B = inhibiting; BC = operating code
Logano plus GB312 – 6 720 647 367 (2012/11)
Cause Description
Flow temperature sensor Successive flow
reading. temperature readings
are too widely divergent.
Return sensor reading. Successive return
temperature readings
are too widely divergent.
Electrode voltage incorrect. Voltage to ionization
electrode too low.
Troubleshooting
Testing sequence/
Cause Measure
Check lead to boiler Replace if damaged.
sensor.
Check connector. If dirty, clean
or replace as necessary.
If connector is loose,
reconnect properly.
Check sensor readings Replace temperature
against table. sensor if there are
discrepancies.
Check temperature Replace SAFe
sensor voltage levels if there are
against table. discrepancies.
Check lead to boiler Replace if damaged.
sensor.
If dirty, clean
or replace as necessary.
Check connector. If connector is loose,
reconnect properly.
Check sensor readings Replace temperature
against table. sensor if there are
discrepancies.
Check temperature Replace SAFe
sensor voltage levels if there are
against table. discrepancies.
Check connecting lead Replace defective lead
between SAFe and or rectify breaks.
electrode for breaks or
damage.
Check electrode gaps and Align burner rod/
electrode for damage. electrode Replace
defective electrode.
Check power supply Ensure power supply
voltage at MC10 input voltage is correct.
(at least 102 V).
Check if voltage dips are Eliminate voltage dips.
occurring (e.g. when large
electrical consumers are
switched on)
If all checks OK, replace
SAFe.
10
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