Daikin Air Conditioners / Daikinindia.com — P circuit board

2017 i have purchase jtkm35srv16 ac
after 4 years i request daikin service for cooling problem. Service person found its a pcb fault, but ac running still running. But not cooling 100%.After 1 year again i have send mail for replacement.Dealer said it will take one week. But within two days they said pcb ready and 1 only 1 month warranty. My qustion is pcb really from daikin ? than why no warrenty for valuable product ? how i identifi pcb new & its daikin supplied product.Now i going to purchase other daikin ac only after clarification for above message.Daikin has no transparency
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