ECM NH3 5250, Instruction Manual, Page: 40 / 62

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Appendix C: Error Codes and Troubleshooting
If one of the NH
3
5250’s displays flashes “ERR” followed by “####” (the Error Code), an
error has been detected in that channel’s module (or attached sensors). The below table lists
the errors. The errors are also flashed on the module’s LED.
Error
Code
Module LED Action Description of Error
0000 Green ON All OK, (green LED constantly on)
0001 Flashing Green 10hz Sensor warm-up period
0002 Green/Both/Red 2s Power on reset / Init hardware
0011 Pulse Red 1x/2s 16 bit ADC failed to init. Internal module error. Contact ECM.
0012 Pulse Red 1x/2s +Vsw shorted. Internal module error. Contact ECM.
0013 Red ON NH
3
sensor turned off (red LED constantly on)
0014 Pulse Red 1x/2s NH
3
sensor heater or cable open, or NH
3
sensor not connected.
0015 Pulse Red 1x/2s NH
3
sensor heater or cable shorted. Bad NH
3
cable or sensor.
0021 Pulse Red 2x/2s Memory chip in NH
3
sensor’s shorted. Bad NH
3
cable or sensor.
0022 Pulse Red 2x/2s No memory chip in NH
3
sensor detected. Bad NH
3
cable or sensor.
0023 Pulse Red 2x/2s CRC16 error. Bad NH
3
cable or sensor.
0024 Pulse Red 2x/2s Invalid NH
3
sensor memory chip parameter. Wrong sensor.
0025 Pulse Red 2x/2s Non-compatible NH
3
sensor memory chip format (old Rev.)
0031 Pulse Red 3x/2s Vsw < 6 for > 7 sec. Supply voltage too low.
0032 Pulse Red 3x/2s Vsw > 32 V. Supply voltage too high.
0041 Pulse Red 4x/2s VS too high. Bad NH
3
cable or sensor.
0051 Pulse Red 5x/2s RPVS too high. Sensor too cold, bad, or battery voltage too low.
0052 Pulse Red 5x/2s (VH Commanded – VH Measured) > 0.5 V for > 10 sec.
Battery voltage too low.
0065 Pulse Red 6x/2s User data (span) in NH
3
sensor memory chip corrupted.
User must reperform NH
3
sensor span.
The two most common problems are a damaged NH
3
sensor and a low supply voltage (less
than 11 V). When the NH
3
sensor is damaged, it must be replaced. It cannot be repaired.
Three other displays of interest are:
1. “….” which means that a NH
3
module has not been assigned to that channel.
See MOd Setup Option .
2. “----“ which means that the display head has an internal problem.
3. “XXXX” which means that the display is not receiving any data. The lambda module
is disconnected, dead, or the EIB cable is broken.