P-off alarm message

!Perform any service if;
• Person going to work on the compressor is certified,
• Compressor completely shut down and electrically isolated
• All compressed air is discharged inside the compressor
• Compressor is completely isolated from the compressed air system.

!In order to serve Us Air Compressor customers faster and better tin order to diagnose product related emails(subject or body part) or text message (body part of the picture sending not as a separate message) , compressor serial number must be written in the communication media.

P-off is the abbreviation of input (P)ower (-off)

Possible reasons P-off pops up are;

1. There is a power outage ( even momentarily),
2. Input voltages are lower than the limit, (even for a short period of time which is so short a standard multimeter can not catch it), compressor understads it as a complete power down and display P-off.
3. Inverter input power layer is down. Check input power voltages (phase to phase and make sure they are within acceptable limits). Check the dc voltage if possible when compressor is running. The dc voltage must not be less than 1.35 times of the highest measured AC input voltage. If so, consult Us Air Compressor service department. Make sure you have the video of the AC voltages and DC voltage measured right after the AC voltage measured to be submitted.