ZIEHL-ABEGG MK090 Series Assembly Instructions Manual

Also see for ECblue Series: Quick start guide Assembly instructions

Contents

ZIEHL-ABEGG MK090 Series Assembly Instructions Manual Manual pdf 40 page image

9 Diagnostics / Faults9.1 Trouble shootingType of error Possible cause AdjustmentFan does not run(anymore)No line voltageline failureUnder - or overvoltageCheck line voltageEarth fault Check motor connection and line voltageShort circuit winding Replace fanThermal motor protection has trig-gered (motor is overheated)Check for free air passages; remove foreign bodies if necessarysee "Impeller blocked or dirty"Check temperature of supply airCheck voltageImpeller blocked or dirty - Switch off power to the motor and secure against switching back on- Check safe isolation from supply- Remove safety grille- Remove foreign bodies or soiling- Remount the safety grille- Further procedure as in the chapter “Start-up”Fan will not start Temperature too low for bearinggreaseInsert bearing with cold greasingAir stream wrong direction(Motor turns in wrong direction athigh speed)Check air stream(see behaviour in rotation by air current in reverse direction)see "Fan does not run"Fan turns too slowly Impeller / blade scrapes / brushes When indicated, clear foreign bodies/dirt from the fanActive temperature managementeffective(Motor or electronics overheated)Check for free air passages; remove foreign bodies if necessarysee "Impeller blocked or dirty"Check temperature of supply airCheck installation space (air speed over heat sink)Air flow to low Fan turns too slowly see "Fan turns too slowly"Airways blocked Check for free air passages (supply/exhaust air vents, filters)see "Impeller blocked or dirty"Pressure loss different to planned Check fan selectionVibrations Imbalance Check blades for damage, soiling or ice (see "Impeller blocked ordirty")No or wrong vibration dampers(only in radial)Install correct vibration dampersUnusual noises Bearing damaged / worn Change bearingsin motor size 055“(Z” / “B” at cross flow) change the fan.Impeller / blade scrapes / brushes When indicated clear foreign bodies / dirt from the fan (see "Impellerblocked or dirty")Operation beyond stall point(for axial fans)Check for free air passages (supply/exhaust air vents, filters)Wrong overlap on nozzle(for centrifugal fans)Observe the installation instructionsAssembly instructions ECblue Diagnostics / FaultsL-BAL-F055D-GB 1634 Index 002 Part.-No.40/51