text: <s>[INST] PowerFlex 700H We got fault F37(Heat Sink UndTp) and F10(System Failure).The temperature reading was -130%(minus), although another drive reading was only 30%.Any assistance what to check or how to solve the problem?Thanks. [/INST] Hi, and welcome to the Forum ! Here below some details about the faults you got: F37 - HeatsinkUndTpThe ambient temperature is too low. (evidently a wrong alarm... :smileysurprised:) F10 - System FaultA hardware problem exists in the power structure. 1. Cycle the power. 2. Verify the fiber optic connections. 3. Contact Technical Support. 4. If the problem persists, replace the drive. - fuzzy logic \\n </s>