1 Pressure Relief Valve 400 psi
2 O Ring
3 Fitting
1. Connect the gauge manifold to the compressor discharge service valve.
2. Set the thermostat control to the coldest setting.
3. Raise the discharge pressure of the compressor by blocking the air flow
through the condenser coil or flipping the condenser breaker in the main
electrical panel.
4. Failure of the high pressure cut out system to stop compressor operation
should be investigated first by checking the control system and second by
replacing the HP Binary Switch.
Note: The discharge pressure must never be able to reach 400 psi on an
R134a system.
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