When do over voltage and under voltage faults occur?
These faults occur when drive measures a HV DC bus supply voltage that is not within the range defined by Under voltage fault thresholdFUV and Over voltage fault thresholdFOV parameters. The deviation of voltage may be impossible to notice with multimeter as length of these voltage surges can be in millisecond range.
Where does The Undervoltage come from in a power supply?
Undervoltages come from drop of power supply voltage during surges. The easiest solution is to set undervoltage paramater [FUV] to a lower value and use power supply that doesn’t shut down or drop to near zero under power surges.
Is there a way to lower The Undervoltage paramater?
The easiest solution is to set undervoltage paramater [FUV] to a lower value and use power supply that doesn’t shut down or drop to near zero under power surges. For very short current surges (millisecond range), an added capacitor to HV DC bus might provide a solution.
What happens when supply voltage is reduced to 12V?
Reducing supply voltage by few volts, say 44V, the allowed voltage change becomes 12V which yields much smaller required capacitance (in the above inductance based method example this change would make 2.2 times difference). Operating drive near maximum supply voltage limit may cause high requirements for overvoltage prevention.
What does invalid service code for discover mean?
Invalid service code, restricted This means one of two things: You’re attempting to transact an AmEx card or a Discover transaction and your system doesn’t support them. A customer tried to pay online with a card that doesn’t support online payments.
What does invalid service code, restricted mean?
Invalid service code, restricted: This means one of two things: You’re attempting to transact an AmEx card or a Discover transaction and your system doesn’t support them. A customer tried to pay online with a card that doesn’t support online payments.
When does a transaction not permitted code appear?
Transaction not permitted – Terminal: This code will appear if you are attempting a transaction and your merchant processing account is not properly configured. Contact your merchant provider and make sure your terminal/POS is setup to receive the type of payment you’re attempting. 62: Invalid service code, restricted