Glow-worm Ultimate 3 30c, Operating Instructions Manual, Page: 16 / 20

Appendix
16
Operating instructions Ultimate 3 0020239565_01
Fault Cause Measure
Product does not
start up:
– No hot water
– Heating does
not heat up
There is air in the heating installation. Purging the radiators
If the problem occurs again: In-
form the competent person
After three successive failed ignition
attempts, the system switches to fault
mode (fault code: F.28).
Press the button. The product
carries out a new ignition attempt.
If the ignition problem is not rec-
tified after three fault clearance
attempts, contact a competent
person.
Hot water gener-
ation functioning
correctly; heating
does not start up.
The external controller is not set cor-
rectly.
Set the external controller cor-
rectly ( → Controller operating in-
structions).