PROGRAMMING GUIDE
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A048 Overvoltage
A048 Description Overvoltage in DC bus (voltage in DC-link).
Event
Voltage measured in DC bus (DC-link) capacitors has exceeded the max. value
allowed for a proper operation of the drive class being used.
Possible
cause
• Check that voltage does not exceed 240Vac +10% (class 2T), 500Vac +10%
(class 4T), 600Vac +10% (class 5T), 690Vac +10% (class 6T).
• Very inertial loads and a too short deceleration ramp (see the RAMPS MENU).
• Alarm A048 can trip even when the motor is pulled by the load (eccentric load).
• If the drive is powered directly by the bus bar, the bus feeder is responsible for
the alarm trip.
• Failure in DC bus voltage measure circuit.
Solution
1. Check voltage in terminals R, S, T. Check mains voltage value M030 and DC bus
voltage value M029. Also check the values of M030 and M029 sampled in the
FAULT LIST when the alarm tripped.
2. In case of very inertial loads and if the alarm tripped when decelerating, try to set
a longer deceleration ramp. If short stop times are needed or if the motor is pulled
by the load, activate the resistive braking unit.
3. If the alarm persists, please contact ELETTRONICA SANTERNO’s Customer
A050 IGBT Fault A
A050 Description
Hardware fault from IGBT converter, side A, or brake overcurrent
Event
The IGBT drivers of power converter A have detected IGBT failure or overcurrent
conditions in the brake circuit (models S14, S22, S32 5T/6T only)
Possible
cause
• Strong electromagnetic disturbance or radiated interference.
• Overcurrent, Overtemperature, IGBTs, IGBT fault.
• Unsuitable braking resistor (models S14, S22, S32 5T/6T only).
Solution
1. Reset the alarm: send a RESET command.
2. If the alarm persists, please contact ELETTRONICA SANTERNO’s Customer
A051 Overcurrent HW A
A051 Description
Hardware overcurrent, side A.
Event
Hardware overcurrent detected by the drive output current circuit.
See A044 SW Overcurrent.
Solution
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