Nibe SMO 10, Installation And Maintenance Instructions Manual, Page: 11 / 60

Actions with operating disturbances 9
SMO 10
If the operating disturbance cannot be rectified by means of the above an installation
engineer should be called.
If necessary set the Switch to “ ” (manual shunt operation necessary).
In position “ ” the control unit's electronic control is
disconnected, the display screen is not lit.
The automatic heating control system is not opera-
tional, so manual shunt operation is required.
Charge pump (LP1), circulation pump (CP1) additional
heat (TS2) and the immersion heater in the water
heater are operational.
Terminal (11) pos. 3, 19, 21 and 25 are continuously
energized.
Switch position “ ”
■
Incorrect values set on the automatic heating con-
trol system.
High room temperature
■
Air in boiler or system.
■
Large amounts of hot water were used.
■
Circuit or main MCB tripped.
■
Possible earth circuit-breaker tripped.
■
Too low mixer valve setting.
■
Switch (8) set to “ 0 ”.
■
Tripped MCB (7) or fine-wire fuse (33). See the
section Dealing with malfunctions — Resetting the
miniature circuit breakers.
■
Tripped temperature limiter. (Contact service)
■
Load monitor or external control may have blocked
the electrical output.
■
Incorrect values set for hot water production.
Low temperature or a lack of
hot water
■ Air in boiler or system.
■
Circuit or main MCB tripped.
■ Possible earth circuit-breaker tripped.
■
MCB tripped (7) or fine-wire fuse (33). See the
section Dealing with malfunctions — Resetting the
miniature circuit breakers.
■
Tripped temperature limiter. (Contact service)
■
Automatic heating control system settings not correct.
■
Day setting set incorrectly so the night change is
active during the day.
■
Circulation pump stopped.
■
Initial pressure in expansion vessel too low. This is
indicated by low pressure on the pressure gauge,
contact the installer.
■
Load monitor or external control may have blocked
the electrical output.
Low room temperature
■ Too high mixer valve setting.
■
Incorrect values set for hot water production.
High hot water temperature
In the event of malfunction or operating disturbances first check the points
below:
NOTE!
As SMO 10 can be connected to a
large number of external units even
these should be checked.