Repair procedures
Refrigerant Recovery
Use only U.L.-listed service equipment that is certified to
meet the requirements of SAE J2210 when removing HFC-134a (R-134a) from
the air conditioning system.
...
Panic
The horn sounds and hazard warning lights flash for about 27 seconds if this
button is pressed for more than 0.5 second. To stop the horn and lights, press any
button on the transmitter. ...