ENGLISH
Insulated-gate bipolar transistor
E6
high temperature.
The voltage of the power supply is
E7
lower than the rated voltage.
The voltage of the power supply is
E8
higher than the rated voltage.
U1
Fault in the communication.
Please note.
These instructions are intended for qualified technicians, do not attempt to carry them out if
you do not have the necessary training and knowledge, as any damage caused by an incorrect
repair will void the warranty.
Specific faults and solutions
Fault
The LED does not turn
on when the unit is
connected
Some buttons do not
work, or the LED display
does not work as usual
72
Problem
There is no
electricity.
The auxiliary power
board and the board
connected to the
display malfunction.
The auxiliary power
board is damaged.
The display is
damaged.
The display is
damaged.
Wait for the transistor temperature to
return to normal.
Press the Power button to restart the
product.
Check if the fan operates as usual, if not,
replace the fan.
Check if the power supply operates
correctly.
After connecting to the mains, the
product turns on as usual.
Reconnect the display board and the
power supply board.
Replace the power supply board or
display board.
Solution A
Check if the plug is
properly connected
to the mains and if
the latter works.
Check the
connections.
Replace the power
board.
Replace the display
board.
Replace the display
board.
Solution B