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| Error Code | Fault Meaning & Symptoms | Suspected PCB Component | Diagnostic Action | Lab Repair |
|---|---|---|---|---|
| E6 | Voltas Inverter AC E6 Error Code Communication Failure Indoor display blinks E6 after 3 minutes. Compressor and outdoor condenser fan motor never kick on. | Outdoor SMPS Power Supply IC & Signal Bridge | Test outdoor SMPS primary DC bus (320V DC). If 0V, replace bridge rectifier. Replace VIPer22A or TNY278 power IC, optocoupler PC817, and check 7805 voltage regulator. | WhatsApp Repair Board |
| E6 | Voltas Inverter AC E6 Error Code Communication Failure Indoor display blinks E6 after 3 minutes. Compressor and outdoor condenser fan motor never kick on. | Outdoor SMPS Power Supply IC & Signal Bridge | Test outdoor SMPS primary DC bus (320V DC). If 0V, replace bridge rectifier. Replace VIPer22A or TNY278 power IC, optocoupler PC817, and check 7805 voltage regulator. | WhatsApp Repair Board |
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