An exclusion clause providing that a party has no claim if equipment 'fails to function for any reason' does not cover deliberate human interference with the equipment — machinery that is turned off or has its settings altered has not 'failed to function' but has been prevented from functioning. Where total loss from multiple causes can be established but apportionment between causes is difficult, the court may estimate the apportionment on the available evidence rather than awarding only nominal damages.
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