Maico MDR 22 EC, Mounting And Operating Instructions, Page: 110 / 177

VENTILATOREN
FR
MDR .. EC
FIG UK
DE
that air ways are free.
Cause 3:
Air ways blocked
Measure:
Check that the air ways are free
(supply/exhaust shutters, protective grille,
filter).
Vibrations/unusual noises
Cause 1: Imbalance, impeller rubbing
Measure: Check impeller for damage, dirt or
icing. Remove foreign objects and deposits on
the impeller and in the housing. Ensure that air
ways are free.
Cause 2: Bearing faulty/worn.
Measure: Replace fan.
ModBus
For settings

ModBus information sheet at
www.maico-ventilatoren.com .
MDR-PG malfunctions:
Cause: Pressure is not registered correctly.
Measure: Check pressure tubing, pressure
transducer and insect protection funnel for
contamination