Cause : Cooling fan warning comes when warning generated by an on- time timer. Programmable warnings check parameter : 133.14 On-time 1 warning select, 133.24 On-time 2 warning select.

Check the event log for an auxiliary code. Check the source of the warning corresponding to the code:

• 0: 133.13 On-time 1 source
• 1: 133.23 On-time 2 source
• 10: 105.04 Fan on-time counter.