© 2022 Staheli West
181
Faults
Fault 306: Steam Coming out of Water Supply Tanks
Causes
Troubleshooting
Fixes
Fr
on
t T
ank
s • One or more pigtail valves
open (Top front of boiler).
• Check pigtail valves.
• Close all pigtail valves (don’t
forget the valve behind the man-
ual pressure gauge).
• Faulty boiler sight glass
check valve.
• Inspect check valve for leaks.
• Replace boiler sight glass check
valve.
Rear T
ank
s
• Normal opening and closing
of the water purge valve.
• The water purge valve opens
for 30 seconds, purging water
and steam into the rear supply
tanks. Then it closes for 30 sec-
onds.
• Does not need a fix / normal
operation.
• Faulty water purge valve
actuator.
• Test in manual mode: Menu
> Operations > Manual mode:
Open and close the water purge
actuator making sure it rotates a
full 90°.
• Replace actuator.