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CHAPTER 6 – TROUBLE SHOOTING
EL-Inverter contains complicated electronic control circuits. In order to locate any fault occurring
circuits, an advanced knowledge about the circuitry and its operation principles must be known.
The aim of this section is to give the knowledge required at the first intervention.
There is no practical way to locate any possible fault. Most of the faults do not cause a loss of
supply to the loads. Generally, the EL-Inverter operates normally or switches into by-pass mode.
But in order to determine any change in load or the system the parameters must be recorded
regularly as mentioned previously.
Generally, the output voltage can deviate 2% from the predefined values. If values differ more than
this percentage then reasons must be investigated.
The following general structure must be systematically followed while trying to indicate the error:
Fault determination:
Fixing interventions:
First step is to record the messages, indicator panel LEDs, operating
parameter values and last status of switches. This must be done before
attempting to press any button.
After recording all indications, check the meaning of the fault and alarm
messages using "The operator control indicator panel". If anything
relates, follow the related procedure.
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