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I-75
F-084392_EN • B
A
dditionAl
i
nformAtion
for
the
i
nstAller
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)
Error
code
Fault description
Explanation
Action(s)
429
Dynamic water pressure
too high
Expansion tank is defective
Verify pump
Replace expansion tank
430
Dynamic water pressure
too low
Verify pump
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.