Compressor Operational Test
- Disconnect wiring from compressor motor and exhaust solenoid terminals. See Fig 1 . Disconnect pressure line from dryer and attach air pressure gauge to dryer fitting.
- Connect 12 volt power supply to compressor through ammeter. Current draw must not exceed 14 amps. Allow pressure to read 100 psi (7.03 kg/cm 2) minimum and shut off compressor. Observe for pressure leaks. Allow pressure to stabilize.
- If compressor is allowed to run to maximum output pressure of 180 psi (12.66 kg/cm 2), the solenoid exhaust valve will act as a relief valve. This gives a false indication of system leakage. If compressor operates correctly, reconnect wiring and air lines.