U-602502, Interim Part 21 Rept 21-95-018 Re Failure of Solid State Trip Devices Type SS-13 Mfg by Gould/Ite (Now Abb,Asea Brown Boveri).Investigation Found Return Air Fan Circuit Breaker in Tripped Condition.Breaker Replaced W/Spare Breaker: Revision history

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25 September 2022