EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
EN2B-0285GE51 R0909
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Table 24. Excel 10 FCU Controller alarms.
Name of alarm or alarm bit
alarm type
number
meaning of alarm code or alarm bit
No Alarm/Return to Normal:
RETURN_TO_NORMAL 128 Return to no error after being in an error condition. This code is added
numerically to another alarm code to indicate that the error condition has
returned to normal.
ALARM_NOTIFY_DISABLED 255 The alarm reporting has been turned OFF by the nviManualMode
=SUPPRESS_ALARMS. No more alarms are reported until
nviManualMode turns ON alarm reporting or upon application restart.
ALM_NO_ALARM 0 No errors since last application restart; initial condition
FCU Alarms:
ALM_NODE_OFF 1 The control algorithm has stopped due to controller disabled, or in test
mode, or other conditions
ALM_FROST 2 The space temperature is below the frost alarm limit. The alarm condition
remains until the temperature exceeds the alarm limit plus hysteresis.
ALM_INVALID_SETPNT 3 One of the setpoints is not in the valid range
ALM_TEMP_SENSOR_FAIL 4 Temperature sensor failed
ALM_SETPNT_KNOB_FAIL 5 Remote setpoint potentiometer failed
ALM_FAN_SPEED_SW_FAIL 6 Fan speed switch failed
ALM_FAN_FAILURE 7 Fan is commanded to be ON, but the air flow detector input does not
detect the fan running.
ALM_COMFAIL_SPACE_TEMP 8 nviSpaceTemp is bound and has failed in receiving an update within its
specified FAILURE_DETECT_TIME
ALM_COMFAIL_HVACMODE 9 nviApplicMode is bound and has failed in receiving an update within its
specified FAILURE_DETECT_TIME
ALM_COMFAIL_SETPTOFFS 10 nviSetPtOffset is bound and has failed in receiving an update within its
specified FAILURE_DETECT_TIME
ALM_COMFAIL_SCHEDOCC 11 nviTodEvent is bound and has failed in receiving an update within its
specified FAILURE_DETECT_TIME
ALM_COMFAIL_DLC 12 nviDlcShed is bound and has failed in receiving an update within its
specified FAILURE_DETECT_TIME
ALM_COMFAIL_TEMPRESET 13 nviTempReset is bound and has failed in receiving an update within its
specified FAILURE_DETECT_TIME
ALM_COMFAIL_ODTEMP 14 nviOdTemp is bound and has failed in receiving an update within its
specified FAILURE_DETECT_TIME
ALM_COMFAIL_OCCSENSOR 15 nviSensorOcc is bound and has failed in receiving an update within its
specified FAILURE_DETECT_TIME
ALM_COMFAIL_WINDOW 16 nviWindow is bound and has failed in receiving an update within its
specified FAILURE_DETECT_TIME
ALM_COMFAIL_MANHEAT 17 nviManHeat is bound and has failed in receiving an update within its
specified FAILURE_DETECT_TIME
ALM_COMFAIL_MANCOOL 18 nviManCool is bound and has failed in receiving an update within its
specified FAILURE_DETECT_TIME
ALM_HW_SW_MISMATCH 19 The software is not compatible with the hardware configuration specified
by the hardware configuration resistor value. Compatibility is checked
only once after application restart.
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