Buderus Logano plus GB312 Installation And Service Instructions Manual page 60

10
Troubleshooting
1)
Type Display code Fault code
V LL 571
V EE 601
V EE 612
V EE 626
Table 23 Fault displays
1) V = interlocking; B = inhibiting; BC = operating code
60
Cause Description
Too many restarts despite 15 directlly consecutive
resetting. restarts have taken
place. In other words,
the same problem was
still present after
resetting.
Important: this fault can
be reset only by the
button on the SAFe.
Flow temperature sensor Successive supply
reading. temperature readings
fluctuate too much
within range.
Checking the return Successive return
temperature sensor. temperature readings
fluctuate too much
within range.
Electrode voltage incorrect. Voltage to ionization
electrode too low.
Testing sequence/ Measure
Cause
Faults have continually Identify and eliminate
been simply reset and not the cause of the problem
rectified. causing the resets.
Check the cable to the Replace if damaged.
boiler temperature
If dirty, clean or replace
sensor.
as necessary.
Check connector.
If connector is loose,
Check sensor readings reconnect properly.
against table.
Replace temperature
Check temperature sensor if there are
sensor voltage levels discrepancies.
against table.
Replace SAFe if there
are discrepancies.
Check the cable to the Replace if damaged.
boiler temperature
If dirty, clean or replace
sensor.
as necessary.
Check connector.
If connector is loose,
Check sensor readings reconnect properly.
against table.
Replace temperature
Check temperature sensor if there are
sensor voltage levels discrepancies.
against table.
Replace SAFe if there
are discrepancies.
Check connecting cable Replace defective cable
between SAFe and or rectify breaks.
electrode for breaks or
damage.
Align burner rod/
Check electrode gaps and electrode, replace
electrode for damage. defective electrode.
Check power supply Ensure power supply
voltage at MC10 input (at voltage is correct.
least 102 V).
Eliminate voltage dips.
Check if voltage dips are
occurring (e.g. when large
electrical consumers are
switched on)
If all checks OK, replace
SAFe.
Logano plus GB312 – 6 720 806 273 (2013/01)