Is the aux fan/fans coming on ? If they dont come on, the pressure at the high side will remain high and that would cause compressor cut-off/cut-in cycles. Did you recently charge the system ? It could be slightly overcharged. If the aux fans do come on at the right times, I would try to remove some refrigerant from the system, get the high side down to between 185-205. Another possibility is that you have air in the system, is there a leak in the system ? Have you charged the system without evacuating ?

__________________
Saumil S. Patel