OK, thanks for the pic.
Set the system, that zone for twice a day every day 45 minutes. Early morning then again at 5pm. Do that 10 - 14 days. Towards the end of that time you will see lawn it start to recover.
After the 10 - 14 days cut back the water to early morning everyday. Hit it with a slow release fertilizer, no less than 50% slow release, and only in the damage area. Continue the everyday watering through the third week. Verti-cut and seed or aerate and seed. Can do the seeding at the second week if it is a high profile lawn or the customer has no patience.
John