Shutter problems in Carnarvon in 2015 February

The shutter motor keeps tripping out, and causing the dome to become stuck open. The dome and shutter motors were swapped over to eliminate a fault with the motor. It was discovered that there was no keyway on the shutter motor shaft which was allowing the motor to slip. A second fault was found on one of the SSR relays in the relay box. A keyway was installed, and the faulty SSR bridged out. The shutter now operates correctly. Additional work was done on the weather arm, replacing the rain detector and repairing the anemometer.