point 3 Series - Common Failure Scenarios

27
GB
E4
Temperature sensor of the IGBT failure
--open circuit.
E5
Temperature sensor of the IGBT failure
--short circuit.
E7
Supply voltage is below the rated
voltage.
E8
Supply voltage is above the rated
voltage.
U1
The LED does not
come on when unit
is plugged in.
No power supplied. Check to see if plug is secured
tightly in outlet and that outlet
is working.
Some buttons
can’t work, or the
LED display is not
normal.
The display board is
damaged.
Replace the display board.
The accessorial power
board and the display
board connected
failure.
Check the connection.
The accessorial power
board is damaged.
Replace the accessorial power
board.
The display board is
damaged.
Replace the display board.
Communication error.
E6 High temperature of IGBT.
Failure Problem Solution A Solution B
Replace the power board.
Wait for the temperature of IGBT
return to normal.
Touch “ON/OFF” button to restart
unit.
Check whether the fan runs
smoothly; if not , replace the fan.
Please inspect whether power
supply is normal.
Power on after the power supply is
normal.
Reinsert the connection between
the display board and the power
board.
Replace the power board or the
display board.
2) Specific Failure & Solution.