Tech arrived at a STU. Upon inspection, the capacitor was close to being out and was replaced. The contactor was in working condition. The Delta and refrigerant was at acceptable levels. The filter was dirty and replaced. The drain system was clear and bleach was poured. The surge protector lights were not illuminated. This can indicate that the part is no longer functioning as intended. The customer agreed to replace the surge protector with a working one. This item was replaced and all lights were on. The system was functioning upon departure.