EC say the VEMD does not lie.
The 4-digit T4 recorder on the VEMD over-limit page is better than the 3-digit original, because once you went past 999 there was no knowing what the upper figure was. I suspect in your case such a high and long overtemp meant a whole new turbine module. The damage from such an overtemp will probably have been obvious to Turbomeca engineers.
The only known snag with the VEMD is a spurious NR exceedance (over the high limit) for 000 secs; this is caused by a voltage spike (turning on and off the landing lamp could do it), should have ben rectified by an SB upgrade, but may still apparently occur.
AFAIK, this is the only VEMD Over Limit warning where your Maintenance Org can let you fly without an engineeer first inspecting.