NEC NP-NC900C-A Service Manual page 20

TROUBLESHOOTING
ErrMsgInterLockOpen
Inter Lock Open toggle and Polling time is 500ms.
Check if connectors are unplugged from slave board to interlock board or replace slave board and interlock
board.
ErrMsgSystemI2cFail
Read Exter IO fail and Polling time is 500ms.
Check or replace slave board.
ErrMsgEepromFail
When read EEPROM fail in system initial.
Check or replace slave board.
ErrMsgLampDoorOpen
Lamp Door (1 or 2) Open toggle and Polling time is 500ms.
Check the lamp1 & Lamp2 door.
ErrMsgSoftwareI2cFail
It's blaster UART Fail
Check or replace slave board.
ErrMsgPreCooling
When fan initial fail in pre-cooling mode.
Check or replace all Fan Driver boards and Fans.
ErrMsgLamp1DoorOpen
When Lamp Door 1 Open toggle and Polling time is 500ms.
Check the lamp1 door.
ErrMsgLamp2DoorOpen
When Lamp Door 2 Open toggle and Polling time is 500ms.
Check the Lamp2 door.
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