Error 28: Over-Temperature
Cause:
The system is exceeding the maximum allowed temperature, either due to extreme use or a short in
the generator windings. Over-temperature can damage the battery or cause the battery charge and LCB
processor not to function properly.
Service:
• If this is accompanied by an Error 8 within 10 seconds of the 28 in the log, the problem is not likely
to be over-temp, but an issue with the LCB. Replace the LCB if the problem persists.
• If the error log has an 8 and then one to sixty minutes later stored a 28, the over-temperature situation
is likely real. Look in to why the unit is over-heating.
• Verify the brake/generator is free from debris and accumulated dust.
• Vacuum the inside of the unit and ensure all ventilation is clear.
• Check for shorted windings on the generator.
• Replace the brake/generator if problem persists.
Page 75 of 202
Cybex 772A, 772AT Arc Trainer Part Number
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