Burnout|the condition in which the breakdown of the motor winding insulation causes the motor to short out or ground electrically. Capacitance boost|a procedure used to start a stuck PSC compressor. Demand|________ defrost is a defrost control strategy that typically does not depend on time to determine when a defrost cycle is needed. Direct-acting|a _______-_______ valve is a valve in which the solenoid operates the valve port. Commutated|an electronically ____________ motor is a variable-speed electric motor based primarily on a DC-driven permanent magnet design that responds to microprocessor inputs to achieve the desired speed. Field|______ wiring is installed during installation for the system; for example, such as a thermostat hookup to unit Pilot-operated|a valve in which the solenoid operates a plunger, which in turn creates or releases pressure that operates the valve.