9.3 MAINTENANCE WARNING CODES
Maintenance
Code
Description
1
Burner operation hour is exceeded.
2
Burner starting quantity is exceeded.
3
Maintenance interval is exceeded.
5
Heating cycle water pressure is too low.
Bottom water pressure limit is reduced
under1.
10
Change battery of outside air sensor.
18
Heating cycle water pressure 2 is too
low.
Bottom water pressure limit is reduced
fewer than 2.
22
Heating cycle water pressure 3 is too
low.
bottom water pressure limit is reduced
under 3
25
Automatic water filling is activated.
Priority
6
6
6
9
6
9
9
3