Yes, possible, if it is too low, the compressor will tend to sieze. If the system is virtually empty, would need to evacuate and recharge, make sure you also add some oil when you recharge. The pressure switch is open possible because of low pressure. If the fuse blows even after you have recharged the system, the compressor clutch coil may be shorted. Infact, check the resistance of the compressor clutch coil (with car off), it should be between 2.5 and 3 ohms, anything lower could indicate a coil short.

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Saumil S. Patel