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It is most likely the low voltage alarm. Suggest connecting when the car is running with no load (110 volts not connected). If the alarm continues turn the unit off and on to reset.
Hope this helps?
Inverter Protection Features
• Short Circuit Protection. The inverter will automatically shut down until short is removed.
• Low Voltage Alarm. An alarm will sound when the voltage from the battery discharges to 10.5 +/- 0.5 volts DC. This is an indication that the battery needs to be recharged.
• Over Voltage Protection. The RED LED Indicator Light will illuminate and the inverter will automatically turn itself off when the input exceeds 16.5 +/- 1 volt DC.
• Under Voltage Protection. The RED LED Indicator Light will illuminate and the inverter will automatically turn itself off when the input is less than 10.0 +/- 0.5 volts DC.
• Overload Protection. The RED LED Indicator Light will illuminate and the inverter will automatically turn itself off when the continuous draw of the equipment being operated exceeds 1200 watts or the surge draw of the equipment exceeds 2400 watts.
• Thermal Protection. The RED LED Indicator Light will illuminate and the inverter will automatically turn itself off when the circuit temperature exceeds 150° F
The system that you described is a closed-loop system. The inverter tells the motor what to do and the encoder send information back to the inverter to verify the operations.
With out knowing part# and serial number of the unit in question, I do not know exactly which inverter you are having problems with.
With E.OC error, there is a lot of current demand on the inverter. This could mean a short in the motor, motor leads, connections or inside of the inverter. This could also be caused by the encoder feedback loop being defective. If the inverter tells the motor to run at 1000rpm and the feedback tells the inverter it is only running at 5rpm, the inverter will send out more current to get the motor up to speed.
Since you are getting multiple errors, there could be other internal problems with the inverter especially if the unit is old and contaminated internally.
We hope it is still new and can be returned, do it as fast as possible.
You will find it hard and very costly to repair it.
Starting ad 75.00 an hour with the bill being around 175. before your running again.
If at all possible Return it and consider it a lessons learned and purchase an nicer Pure sine wave inverter in the 1500 watt size area. they tend to be much better and are much more capable of running full time under a load.
Sad new I'm sure for you SORRY. I'm a Seven inverter owner with only one good inverter to show for all the trouble.
I suspect that your INPUT power level is not adequate for the inverter to put out the 200W that the 150W charger needs. If you have low current and low voltage - then the inverter can only put out a proportionally smaller AC wattage level. You may also have a faulty voltage sensor....at the input. Once the inverter sees a low level (even momentarily), it alarms and shuts down the output until the unit is reset (turned off/back on)
An incandescent lamp that is cold takes approximately 10 times the running current initially. The inverter MAY not be able to start the 500 watt lamp if its protection circuits sense the very low starting resistance of the lamp.
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