Buderus Logano plus GB312 Installation And Service Instructions Manual page 62

10
Troubleshooting
Faults 8L/579 (interlocking)
Cause: no gas supply pressure/safety sequence pressure switch cut out.
Is the required gas supply
pressure of > 3.5 inches w.c.
present?
Check setting of SAFe
pressure switch
(should be 3 inches w.c.)!
Is pressure
switch setting
correct?
Perform reset!
Does MV1 (see LED of the gas
valve) open before error
message?
Does burner start up?
Does burner start up?
Fig. 70 Troubleshooting procedure 8L/579
62
no
yes
no
Adjust setting
to 3 inches w.c.
yes
no
no
no
Description: there is no gas pressure present / a pressure switch in the
safety sequence has tripped.
Eliminate cause!
Perform reset!
Check gas
valve connector
is in proper contact.
Replace SAFe
pressure switch.
Replace SAFe!
Perform reset!
Perform reset!
Perform reset!
Perform reset!
Logano plus GB312 – 6 720 806 273 (2013/01)