Cause : Fan has reached the maximum operating hours comes when the maximum operating time of at least one fan will soon be reached, or has already been exceeded.

Fault value (r0949, interpret binary):

Bit 0: heat sink fan will reach the maximum operating time in 500 hours.
Bit 1: heat sink fan has exceeded the maximum operating time.
Bit 8: internal device fan will reach the maximum operating time in 500 hours.
Bit 9: internal device fan has exceeded the maximum operating time.

For the fan involved, carry out the following:
- replace the fan.
- reset the operating hours counter (p0251, p0254).