The Airconditioning Pump is 120VAC. The Fuse panel is 12VDC. The fuses in the 12V fuse bus (typically under the dash) will not apply. AC will commonly have a dedicated shorepower connection, a dedicated 30A Main Breaker and a dedicated 15a circuit breaker.
The shorepower circuit should have a Volt Meter and light indicating it has voltage. I'd make sure I'm showing full voltage at the meter. A hand-held volt meter will help troubleshooting the breakers themselves.
More than likely this is a breaker issue. Otherwise its the pump itself.