IA7 - Check VRIS Shutter Valves

Check VRIS Shutter Valve:

^ Disconnect the shutter valve actuator linkages from the shutter valves.

^ Check that the shutter valves move smoothly from the fully closed to the fully open position.

^ Are the shutter valves free of binding or damage?

YES -- Go to IA8. IA8 - Check VRIS Shutter Valve Actuators

NO -- Service or replace the shutter valve assemblies.