Please be sure to place the robot into the shallow end of the pool.
Run the robot in the water without the filter bag/bags for one or two minutes in a clean section of the pool.
If the robot runs normally, without the filter bags, then the filter bags may be clogged.
Wash the filter bag/bags in your washing machine on gentle cycle, cold water, NO detergent. Or, hand-wash the filter bags in a 5 gallon bucket of water.
This will release the dust particles from the bag into the bucket. Reinstall the bag/bags and run the cleaner.
If the robot is still not covering the entire pool, there may be an issue with the pump motor or power supply.
*Note: If a jet is moving, there is no issue with the power supply or motor. Adjust the pin setting and/or timer settings for the Turbo T-Jet.