
HAMWORTHY HEATING LTD
83
Merley Boiler Sequence Controller
500001210/D
6.19.2 Maintenance code
Maintenance
code
Description of maintenance
Priority
1
Burner hours run exceeded
6
2
Burner starts exceeded
6
3
Maintenance interval exceeded
6
10
Replace battery of outside sensor
6
21
Maximum flue gas temperature exceeded
6
22
Water pressure 3 heating circuit too low
(dropped below lower pressure limit 3)
9
6.19.3 Special operation code
Special operation
code
Description
301
Manual operation
302
SLT test
303
Chimney sweep function
309
Simulation outside temperature
310
Alternative energy operation
314
Economy mode