We bought the Ninja FD 402 LP3 online from USA we are located in UK. We used a USA to UK voltage converter  (input 220/240v output 110/120 v).  As instructed in the manual we followed all steps to " test first time pressure cooking". When we press "start" it emits a whirring type of sound it immediately shuts down and restarts. Goes to default airdryer mode. We can't use the equipment. Please advise. Thanks.