ZA4 keeps dying

[GahddenBooi]

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Hi,

Have you tested the output from the transformer? Are you susceptible to power outages/surges in your area? It sounds to me like the board could be getting a surge of power every so often, this can be rectified why wiring an in-line surge protector into the supply circuit.

Thanks for the advice - will certainly do so. What should I expect? 

There are two banks of connectors - one with 0/12v/24v connections (blue/purple/orange cables respectively), and the other with L1T, L2T and CT (white/red/black respectively). The latter has four connectors to choose from for CT (1-4) depending on the motor torque requirements. CT is currently connected to nr2.

No power outages/surges worth mentioning.