PH: Voltage on DC Bus Bar Too High (P&N Protection)
PH TROUBLESHOOTING STEPS:
Step 1: Check for High Voltage
Measure the voltage to ensure it is within the specified range. Refer to the data plate for rated voltage.
Step 2: Check the Outdoor Board
Inspect the outdoor control board for signs of damage or malfunction.
Verify that the wiring connections on the outdoor board are secure.