Frequency converter OC alarm, what's the matter?
I guess the original intention of the inverter circuit designer is this: when the power test module has broken down, or the operation of the module endangering the safety of the module, even the module has been damaged, it will promptly report the OC fault. The cause is generally a load side, a short circuit or a heavy loadThe load causes excessive overcurrent, or over current or even short circuit due to bad drive or damage of the module itself.
The frequency at which the OC fault occurs in all faults of the inverter may be the highest and the most frequent. In the process of starting the alarm, in the process of stopping the alarm, alarm in operation, so that power on the alert, and even with other fault codes or currentIndirectly tell you that there is a OC fault in this inverter!
Description of the OC fault in the inverter manual, following several explanations: the load side short-circuit current greater than OC, run jump failure is two times; the output of the inverter module circuit; current transducer; overload; acceleration and deceleration time is too shortEtc.. Some models do not use OC to mark such faults. They are explained by load side short circuit, frequency converter overload, serious ground fault and so on. This is of course the alias of OC fault.
And some did not inform you of the inverter fault category, when the OC boot failure, will cause greater danger, then simply caused by surface phenomenon similar to program crashes, such as the P9/G9 series machine when the machine detects INVT, module failure, operationThe H00 character appears on the panel, and all key actions are rejected. Unknown insider will think: program crash, CPU motherboard is a problem.
A "Taiwan" type N2 power type, power jump UL or UU fault, refused operation. Check the three-phase current transformer signal, the three signal is seriously deviation, or at least it has broken two. But check the specification of the manual code, there is no such twoKind of fault code, guess this code is factory repair personnel can crack password, insufficient for outside humanitarian. Does it also indirectly indicate the OC fault? Only to be repaired in order to have an answer.
