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I-75
B-070343_EN • B
A
dditionAl
i
nformAtion
for
the
i
nstAller
Error
code
Fault description
Explanation
Action(s)
431
Sensor primary heat ex-
changer
Check connection and sensor. Replace
as required.
432
Function ground not con-
nected
Check ground connection and install as
required
433
Temperature primary heat
exchanger too high
Check the heating system external hy-
draulic components.
Maintenance Messages
Code
Meaning
Action
1
Number of burner hours run exceeded
Contact Maintenance service
2
Number of burner starts exceeded
3
Maintenance interval exceeded
5
Water pressure 1 heating circuit too low
Fill the circuit to reach acceptable
pressure.
18
Water pressure 2 heating circuit too low (dropped below
lower pressure limit 2)