Discharging problems on a Pro Trak

[markc]

Hi,

Ive recently bought a second hand Pro Trak, but whenever I try to discharge any of my cells it gets about 10 seconds into the discharge then comes up with a 'Check External Fuse' fault and terminates the discharging.

I've checked the fuses on the sides of the charger and they look ok.

Anybody have any ideas what this might be?

Cheers

Mark