Toyota Prius 2010 Repair Manual page 304

ON-VEHICLE INSPECTION
1. INSPECT COOLER CONDENSER ASSEMBLY
(a) If the cooler condenser assembly fins are dirty, clean them with water and dry with compressed air.
NOTICE:
Do not damage the cooler condenser assembly fins.
(b) If any cooler condenser assembly fins are bent, straighten them using a screwdriver or pliers.
2. INSPECT FOR REFRIGERANT LEAK
(a) Using a halogen leak detector, check pipe joints for refrigerant leaks.
(b) If refrigerant leak is detected in a joint, check the torque of the joint.
2010 Toyota Prius Repair Manual