10
INSTALLATION, CONNECTION AND ENERGIZATION
✓
NOTE!
The maximum number of pre-charge procedures that can be performed per hour must be established by the auxiliary trans-
former supplier.
WARNING!
If during the pre-charge any problem occurs, the inverter indicates an error related to it. The possible errors are:
F0014 - Input circuit breaker closing failure.
F0017 - Input circuit breaker not ready.
F0020 - Pre-Charge Fault.
Refer to these error (alarm/fault) descriptions in the MVW01 Programming Manual.
✓
NOTE!
The last speed reference value, set via the and keys and , is saved in the memory (P0120 = 1).
If you want to change this value before enabling the inverter, change it through the parameter P0121 (HMI speed reference).
NOTES:
1. If the motor speed direction is inverted, switch off the inverter following the safe de-energization instructions and swap two of the motor
cables.
The HMI must indicate the same direction seen looking against the motor shaft end.
2. It the current is too high during the acceleration, especially at low speeds, it is necessary to reduce the acceleration ramp time (P0100
ou P0102) or change P0136 Torque boost setting.
Gradually increase and decrease the P0136 (Manual torque boost (I x R)) content until reaching an operation with approximately constant
current throughout the entire speed range.
Refer to the parameter description in the MVW01 Programming Manual.
3. If F0022 (DC Link Over Voltage) occurs during the deceleration, then increase its time via P0101 (Deceleration time) or P0103 (Decel-
eration time 2nd time) and check P0151 (DC Link voltage regulation level).
WARNING!
If the inverter receives a general enabling or a start command before the pre-charge has been finished (inverter still in under-
voltage state), the command will be ignored and a warning message “Inverter Undervoltage” will be displayed on the HMI.
10.3.5 Safe De-energization Instructions
DANGER!
Although the inverter commands the opening of the input circuit breaker, there is no guarantee of its opening and neither
that no voltages are present, because the capacitors remain charged for a long time and they can also be charged
through the auxiliary supply (pre�charge).
In order to open the medium voltage cabinets, follow all the safe de-energization procedures described next.
DANGER!
Bien que l’onduleur commande l’ouverture du coupe-circuit d’entrée, il n’y a aucune garantie qu’il s’ouvrira ni qu’aucune
tension n’est présente, car les condensateurs restent chargés pendant longtemps et ils peuvent également être chargés
par l’alimentation auxiliaire (précharge).
Pour ouvrir les armoires moyenne tension moyenne, suivez toutes les procédures de mise hors tension de sécurité
décrites ci-dessous.
1. Decelerate the motor to a complete stop.
2. Check the DC link voltage at the parameter P0004 on the HMI.
Open the control panel door and locate the neon lamps of the HVM (High Voltage Monitoring board), mounted on the cabinet left side.
The four lamps must be on if the voltage showed via P0004 is above 200 V.
3. Press the “POWER OFF” pushbutton. The input transformer circuit breaker is switched off at this moment, and the “INPUT ON” pilot
light going off indicates it.
MVW01 | 10-20
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