E9 displays and the cooker will not heat; sometimes occurs after a tripped breaker or lightning storm.

Safety first: Unplug the multicooker and do not attempt to power it on repeatedly if E9 persists.

• Check household circuit: Verify that the wall outlet is working by testing another appliance. Reset any tripped breakers.
• Visual inspection (advanced): Remove the bottom cover to access the main PCB. Look for a small replaceable fuse on the board. If present and visibly blown, it may be replaced with an identical type and rating.
• Inspect for burn marks: Examine the board for scorched areas, cracked components, or a burnt smell. These signs indicate serious board damage.
• Do not bypass safety components: If the fuse blows again immediately or if there is visible board damage, the triac or other power components are likely shorted and the entire board should be replaced.
• Reassemble and test: After any fuse replacement, reassemble the unit fully before plugging in and testing. If E9 remains, discontinue use.

Warning: High-voltage circuitry is present on the control board. If you are not experienced with electronics repair, seek professional service rather than attempting board-level work.