The system execution period has expired; contact the manufacturer for decryption (For ER series, version V5.0)

50020

Alarm cause: This alarm appears when the permitted usage time after encryption expires; contact the manufacturer to perform decryption

Applicable equipment

Source: Fault JSON · ESTUN_fault_codes_zh_en.json · SHA-256 e318b3bb20315d070a7f50bd7649bf7dfd7d178030a4f7c736a5aa22f48095f9 · 50020

Brand	ESTUN
Updated	2026-10-27

50020

Alarm cause: This alarm appears when the permitted usage time after encryption expires; contact the manufacturer to perform decryption

Applicable equipment

Source: Fault JSON · ESTUN_fault_codes_zh_en.json · SHA-256 e318b3bb20315d070a7f50bd7649bf7dfd7d178030a4f7c736a5aa22f48095f9 · 50020

Brand	ESTUN
Updated	2026-10-27