EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE

Table 24. Excel 10 FCU Controller alarms.

 

Name of alarm or alarm bit

alarm type

 

meaning of alarm code or alarm bit

 

number

 

 

 

 

 

 

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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EN2B-0285GE51 R0909

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Honeywell W7752D specifications Returntonormal, FCU Alarms

W7752D specifications

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