Continuous Beep sound

• Inverter Basics
• Inverter Issues

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Microtek EB 900

Problem	Contentious beep sound when mans connected
Fault	Faulty transformer voltage switching relay
Solution	View this video
Parts used	10 Amp relay

Microtek EB unknown model

Problem	Contentious beep in Microtek inverter
Fault	Faulty PF Capacitors which is connected to Crystal of the 28 Leg Microcontroller
Solution	Checked Microcontroller and its voltage, found OK > Checked Crystal, found OK, Checked the PF capacitor connected with Crystal found faulty with no voltage > Changed the crystal and problem solved. Video.
Parts used	N22J Ceramic capacitors

Microtek EB700

Problem	continuous beep
Fault	Carbon in the IC
Solution	First checking the 7805 mosfet voltage which should be 5v in the middle leg which then sends the voltage to the main IC for operation of inverter> Mosfet found correct then found carbon in the IC, Cleaned the IC and Inverter started working.
Parts used	no parts used

• A continuous beep sound will generate if leg 1 and leg 20 of the 28 leg micro controller is not getting 5v dc due to any reason
• Always check the 28 leg ic and its components in case of continuous beep problem