What does variable voltage mean on a compressor?
If the variable voltage signal to the compressor is close to 0V, or 10% on time, then something is commanding the system off. Check the voltage signal at the pulse-width modulated compressor solenoid control wire at the a/c control module first.
What is the minimum starting voltage for a compressor?
Minimum starting voltage for the compressor when it is attempting to start (locked rotor) is: Unequalized system pressure : Head and suc- tion pressures must be equal and not more than 170 psig. Refrigeration metering device (cap tube or TX valve) should equalize system pres- sures within 3 minutes.
Why is there no power to the a / C compressor?
Potential Causes: A/C Compressor, A/C Pressure Sensor F129, A/C Switch, Ambient Temperature Switch F38, Battery Auxiliary Fuse Box, Fan Control Module J293 (and Wiring), Fuse or Lost Throttle Basic Settings Test the Fan Control (FCM) module inputs as follows: 1.
How to diagnose a pulse width modulated compressor?
Check the voltage signal at the pulse-width modulated compressor solenoid control wire at the a/c control module first. An open or grounded circuit in the wiring will prevent the system from operating. Next, check the a/c control module for codes. These codes must be addressed first.
If the variable voltage signal to the compressor is close to 0V, or 10% on time, then something is commanding the system off. Check the voltage signal at the pulse-width modulated compressor solenoid control wire at the a/c control module first.
Minimum starting voltage for the compressor when it is attempting to start (locked rotor) is: Unequalized system pressure : Head and suc- tion pressures must be equal and not more than 170 psig. Refrigeration metering device (cap tube or TX valve) should equalize system pres- sures within 3 minutes.
How do you connect a jumper wire to a compressor?
Unplug the single wire connector on the front side of the compressor. Take the fused jumper wire and connect its one end to that side of the wire connector that was connected to the compressor. Attach the other end of the jumper wire to the positive terminal of the battery.
Check the voltage signal at the pulse-width modulated compressor solenoid control wire at the a/c control module first. An open or grounded circuit in the wiring will prevent the system from operating. Next, check the a/c control module for codes. These codes must be addressed first.