The soultion of Alarm #4020 #4021
- Switch to SYSTEM page
- Pressing “MLC status” key.
- Pressing the “I_bit” key.
- The I Bit 41 displays FF means the Controller received the “Power sink is too high” alarm
signal form ALP PCB board. Opposite, the I Bit 42 displays FF means the Controller received
the “Power sink is too low” alarm signal form ALP PCB board.
