4-40
TROUBLESHOOTING
“Confidential, Do Not Duplicate without written authorization from NEC.”
Error code
Error message
Description
Solution
703
Slave Comm Ack Fail
Slave fauls to execut the command.
1
Check version info to examine whether the
firmware of the Slave uC PWB has been written
correctly. Rewrite it if it is written wrong.
2
Check version info to examine whether the
firmware and data of the CPU board has been
written correctly. Rewrite it if it is written wrong.
3
Confirmation of Slave uC PWB mounting
conditions
After confirming the above conditions, turn the power
supply ON. If there is still an error, replace the Slave
uC and CPU PWBsin this order. If the error disappears
then thereplaced PWB is found to be faulty .
710
Lamp1 OverTime
Lamp1 cumulative time is over.
Lamp 1 Cumulative time is exceeded.
711
Lamp2 OverTime
Lamp2 cumulative time is over.
Lamp 2 Cumulative time is exceeded.
740
SensorFail Inlet
Failed to read inlet sensor.
Check the J4 cable of the Slave uC PWB.
741
SensorFail DMD
Failed to read DMD sensor.
Check the J11 cable of the Slave uC PWB.
750
OverTemp.DMD Precaution
Set inside temperature (DMD) is close to over temperature.
Check ambient temperature, suction air andexhaust.
Check the J11 cable of the Slave uC PWB
751
OverTemp.Inlet Precaution
Set inside temperature (Inlet) is close to over temperature.
Check ambient temperature, suction air andexhaust.
Check the J12 cable of the Slave uC PWB
752
Down Lamp Power Activated
Down lamp power to decrease set inside temperature.
The Power is lowered to Min level, because of the
temperature error in the Set.
Check ambient temperature, suction air and exhaust.
753
OverTemp.Ballast1 Precaution
Set inside temperature (Ballast1) is close to over
temperature.
Check ambient temperature, suction air and exhaust.
Check the Ballast2.
754
OverTemp.Ballast2 Precaution
Set inside temperature (Ballast2) is close to over
temperature.
Check ambient temperature, suction air and exhaust.
Check the Ballast2.
760
OverTemp.DMD
Set inside temperature (DMD) is abnormal.
Check ambient temperature, suction air and exhaust.
Check the J11 cable of the Slave uC PWB.
761
OverTemp.Inlet
Set inside temperature (Inlet) is abnormal.
Check ambient temperature, suction air and exhaust.
Check the J4 cable of the Slave uC PWB.
762
OverTemp.Lamp
Set inside temperature (Lamp) is abnormal.
Check ambient temperature, suction air and exhaust.
Check the J26 cable of the Slave uC PWB.
* Supplementary explanation is in the margin.
764
OverTemp.Ballast1
Set inside temperature (Ballast1) is abnormal.
Check ambient temperature, suction air and exhaust.
Check the Ballast1.
765
OverTemp.Ballast2
Set inside temperature (Ballast2) is abnormal.
Check ambient temperature, suction air and exhaust.
Check the Ballast2.
781
Interlock Open
Interlock is open.
Short-circuit between each 1-2 pins,3-4 pins on the
Interlock BD (on lens' left).
Check the Slave uC PWB, J4 cable.
782
SystemI2cFail
Failed to control sensors connecting to GPIO chip.
(Slave board internal abnormality)
Replace the Slave uC PWB.
783
EepromFail
Slave MCU failed to read back all of data from EEPROM on
slave MCU board due to unexpected data or something.
(Slave board internal abnormality)
785
SoftwareI2cFail
I2C/UART conversion chip control failed on slave board.
(Slave board internal abnormality)
786
PreCooling
Failed to precool.
If there's no other error than this Pre-Cooling failure
and in the case the error stays after turning AC-ON,
replace the Slave uC PWB.
787
Lamp1 Door Open
Lamp1 door (cover) is open
Check the Lamp 1 door.
Check the J25 cable of the Slave uC board.
Check the Lamp 1 door switch.
* Supplementary explanation is in the margin.
788
Lamp2 Door Open
Lamp2 door (cover) is open
Check the Lamp 2 door.
Check the J52 cable of the Slave uC PWB.
Check the Lamp 2 door switch.
* Supplementary explanation is in the margin.
789
Ballast1UartError
Communication error between slave MCU and ballast1.
Check the J17 cable of the Slave uC PWB.
Check the Ballast1.
790
Ballast2UartError
Communication error between slave MCU and ballast2.
Check the J18 cable of the Slave uC PWB.
Check the Ballast2.
791
FanInitError
Failed to initialize fans.
Check the FanDrive board B/C/D/E (including cable
connections).
* For FanDrive board, refer to the FAN layout.
792
ExGpioFail
Failed to control the signal connecting to Ballast.
(Slave board internal abnormality)
Replace the Slave uC PWB.
793
Notch Filter Open
Notch Filter Cover is open.
Check the Notch Filter Cover.
Check the Slave uC PWB, J24cable.
* Supplementary explanation is in the margin.
800
Fan15 Stop
Fan15 has stopped.
Check the corresponding FAN (referring to the
layout), cable, and Fan Drive board.
801
Fan16 Stop
Fan16 has stopped.
810
Fan15 Stop Precaution
Fan15 Stop Precaution
Prepare for a corresponding FAN for replacement.
811
Fan16 Stop Precaution
Fan16 Stop Precaution
[Supplementary explanation]
The following 4 errors will be output according to the priority order.
If multiple errors occurred at same time, the error of the higher priority will be
output and others will not be displayed.
• Error output priority order (from the top)
793 Notch Filter Open (J24 = Open)
i
762 OverTemp.Lamp (J26 = Open)
i
787 Lamp1 Door Open (J25 = Open)
i
788 Lamp2 Door Open (J52 = Open)
Содержание NP-NC900C-A
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