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 43 page image

9.3 Brake function and behaviour in rotation by air currentAt applied line voltage, enable and a setting signal above "0", the speed control is active and thespeed is stable even under load fluctuations.If the motor is not controlled with line voltage applied, i.e. without enable or with enable with settingsignal "0", the brake function becomes active to hold the motor until start (holding brake).• If the line voltage is switched on whilst the fan is rotating in reverse (wrong turning direction), this isdecelerated and started in the correct turning direction at a setting signal above "0". To protect theelectronics against too high braking current, this function is partly (fan-dependent) only possible upto a certain speed value.• The braking function also becomes active to bring the fan to a standstill when this is driven with aspeed below 100 min-1 (without control). At speeds above 100 min-1 the motor control does notintervene.• When driven in correct direction of rotation and with enable with a setting signal above "0", themotor is started whilst the fan is rotating.Behaviour in strong drive in reverse direction (e.g. suction)The braking effect with applied line voltage is limited, strong reverse acting forces can lead torotational movement despite the holding brake.From a certain level (fan-dependent) it is no longer possible to start the fan in the correct turningdirection (=> message: Fault motor start). Further start attempts follow; the error message disappearsif start is successful.Information• Do not switch off the line voltage so that the braking function can prevent rotation of the fan inreverse (wrong) direction and safe starting is possible.• If the application requires safe starting after switching on the line voltage, too strong an air current(suction effect) in reverse direction must be prevented by suitable measures.• Special settings are possible which can lead to deviations from the above functional description.10 Service work10.1 Repairs / maintenanceAttention!• Please read the Safety instructions chapter before working on the fan!• Before working on the fan, this must be disconnected from the power supply and secured againstswitching back on!• No maintenance work at running fan!• Allow maintenance work to be carried out by trained specialists only.• Any faults detected in the electric system/modules/operating equipment must be correctedimmediately. If these faults are not corrected, the device/system is potentially very dangerous. Thedevice/system must therefore not be operated when it is faulty.• Wear safety shoes and gloves for handling!• Please observe the safety regulations and the worker´s protection rules by all maintenance andservice work (EN 50 110, IEC 364).• Fuses must always be only replaced; never repaired or bridged. The specifications for the maximumseries fuse must always be adhered to (see Technical data). Only fuses cited in the electrical circuitdiagram may be used.• Generator operation can produce dangerous voltages (see safety instructions)!• Keep the airways of the fan free - danger because of objects dropping out!• Watch out for vibration free motion!• The impeller is subject to natural wear depending on the area of application and the conveyingmedium. Deposits on the impeller can lead to imbalance and damage (danger of permanentfracture). The impeller can burst!• If highly aggressive media for which the product is not suited are conveyed, the severe corrosionmay result in the impeller breaking. Any impellers corroded in this way must be replacedimmediately.Assembly instructions ECblue Service workL-BAL-F055D-GB 1634 Index 002 Part.-No.43/51