Troubleshooting
66
Correction
(continued)
Check fixed high limit
If the burner control unit cannot be reset after a fault shutdown (F2), even
though the boiler water temperature is below approx. 203°F / 95°C, check the
fixed high limit.
1.
Pull the leads from fixed high limit
.
2.
Check the continuity of the fixed
high limit with a multimeter.
3.
Remove faulty fixed high limit.
4.
Coat the replacement fixed high limit
with heat conducting paste and
install.
5.
To reset press “Reset” on the
control unit.
5
5
8
1
7
7
5
1
.3
A
