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It may have been PLL instead of PPL. If so, that stands for Phase-Locked Loop, and is the circuit that the transmitter needs to generate the desired frequency to transmit on. That being the case, there's no user remedy and the unit must be serviced by a qualified radio shop.
You can download the instruction manual from JVC here, and the features and specifications page is here. These should give you all the information JVC has available.
It sounds as if motor is spinning and pump is free so the impellar must not be attached to the motor shaft. There is a set screw on the impellar to hold it to shaft or the pump impellar could be cracked. Only way to tell is take the impellar housing off.
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