hello friends check a heater brand kronos 7 liters check the batteries with good voltage, the microsuiche, the power cutter the movement of the microsuiche when opening the water passage, the gas passage solenoid, the power supply cables to the ignition module and all the cables around and are well. My question can be repaired the ignition module and if there is any service manual, detail of modulo.marca changwei model dc3v - (d16 AC 3v). thank you very much for your attention