The cooler is working on 12 volts, but not working on 220 volts

Possible Causes:

• Check the connections between the cooler and the battery – if a fridge runs on 220 volts, most issues are not related to the unit.
• The power supply is faulty. Please replace it.
• Check the compressor – if the compressor and condenser do not start, replace the compressor controller
• If there is a voltage protector, you can bypass it. (TAKE CARE!)
• The compressor and condenser fan do not start up.  Replace the compressor controller.