Heard motor ramp up and almost immediately slow back down when first on site and next to unit aswell. Checked for any codes stored in the system. Most recent code was E99 for system reset caused by power reset. Office staff used Aurora Web Link website to check and confirm any unusual operation for today and Wednesday the 4th. No unusual measurements or codes were found. System is controlling the operation properly with no issues found or suspected. Will call Waterfurnace to verify any information.