Try this1. Test run (1) Stop the air conditioner operation. (2) Press the master control button and the fan control button simultaneously for 2 seconds or more to start the test run (3) Press the start/stop button to stop the test run Test run如果制冷，就暂时用。直到来人修。 2. Self diagnosis To perform the self-diagnosis. E:EE indicates an error has occurred. REMOTE CONTROLLER DISPLAY 1) Stop the air conditioner operation. 2) Press the set temperature buttons simultaneously for 5 seconds or more to start the self-diagnosis. Refer to the following tables for the description of each error code (3) Press the set temperature buttons simultaneously for 5 seconds or more to stop the self-diagnosis. Self-diagnosis之后，你会看到error code Error code is from 00 to 0F Then from 11 -14