Buderus Logano plus GB312 Installation Manual page 82

10
Troubleshooting
Type Display
1)
code Fault code Cause
B 8L 579
Tab. 17 Fault messages
1) V = locking; B = inhibiting; BC = operating code
82
Description
No gas pressure. There is no gas
pressure.
( Section 10.3,
page 88 ff.)
Logano plus GB312 - Technical specifications are subject to change without prior notice
Testing
sequence/Cause Action
Check that the gas Turn on gas cock if
cock is turned on. necessary.
Check that gas Measure gas pres-
pressure is present. sure.
Check setting of low Correct low pres-
pressure switch sure switch (avail-
(available sepa- able separately)
rately). settings.
Check continuity on If there is no conti-
SAFe pressure nuity on SAFe pres-
switch, air supply sure switch:
pressure switch, flue
– Check whether
gas pressure switch
manual gas cock
and high gas pres-
before Venturi is
sure switch (avail-
open.
able separately)
– Check connec-
tor on gas valve
is properly
seated.
– Replace pres-
sure switch.
If no continuity on
pressure/air supply
pressure/flue gas
pressure/high gas
pressure switch:
Replace pressure
switch concerned.
If continuity OK on
Replace low gas
SAFe, air supply
pressure switch
pressure, flue gas
and wiring.
pressure and high
gas pressure switch