Wolf BML Operating Instructions Manual page 43

No. Faults
220 Air flow
222 Filters
251 eBUS fault
255 VAmin limit
3063527_201308
Fault messages
Effect
Both fans are switched off.
All outputs are set to "0".
Once the fault is remedied
and the fault message is
acknowledged, the system
starts again.
If the differential pressure
falls below the set differential
pressure, a fault message
is issued. The entire system
continues running as normal.
Fault message must be
acknowledged.
System fails to start
The system stops after
5 min. and will not be enabled
again until 6 hours later, or
automatically reset when the
fault is acknowledged on the
BML.
Cause / Remedy
V-belt torn.
Outside air dampers fail to open
Replace V-belts.
Filter is contaminated.
Replace filter.
Power failure; supply to eBUS
interrupted.
The affected zone continues
running in day mode.
Remove the BML and clip it
back in again while holding
down the r.h. selector (master
reset).
Outside temperature too cold to
maintain the supply air minimum
limit.
Check whether the high limit
safety cut-out has responded
on the filter pre-dryer and
reheater coils. If so, reset the
high limit safety cut-out.
43