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Will a bad capacitor cause the compressor not to come on? 

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This paper presents an electrolytic capacitor-less variable speed drive system for the compressor of an air-conditioner to enhance cost and size competitiveness and reliability.
The results indicate that the pressure oscillations will have a throttling effect on the compressor and change its operating points.
An important result of the presented compressor cascade investigations is that viscous effects may cause a significant change in the aerodynamic damping.
It depends distinctly on the operating point of the compressor.
Results indicate that the injection velocity has major effects on compressor stability.
Considerable influence of the external cooling on such compressor temperature conditions is proved.
It is suggested that the rotating stall condition that was observed in this compressor may play a similar role to that observed when rotating stall initiates surge in multistage axial compressor.
The characteristics of compressor will be different due to the effect of the adiabatic exponent of working fluid, especially for highly loaded compressor working at higher inlet Mach number.
Thus, a larger compressor will be required for the same refrigeration capacity with HFC-134a.
The results indicate that the tested compressor will give a greater refrigerating capacity with HFC 134a than with CFC 12 for certain operating conditions.

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