4100U-S1 Programming Guide
Document: LT0400
AS1668 Fan Controls
Page 10-12
15 December 2010
Issue 1.4
10.5.8
FAN fault conditions
This equation sets the amber LED (fault) to ON when the fan control relay is set to operate
the fan but the airflow indicator does not report that air is flowing, when the fan control relay
is set to stop the fan but the airflow indicator reports that air is flowing or a fault signal is
received from the Mechanical Services Board.
[INPUTS]
STATUS
ON
M1
-
5
-
1
| MRELAY | RELAY | FAN 1 START RELAY
AND
NOT
STATUS
ON
M1
-
5
-
2
| MTSENSE | UTILITY | FAN 1 RUN INDICATION
SAVE
1
STATUS
ON
M1
-
3
-
0
| RIAM | RELAY | FAN 1 STOP RELAY
AND
STATUS
ON
M1
-
5
-
2
| MTSENSE | UTILITY | FAN 1 RUN INDICATION
OR
RECALL
1
DELAY
ANALOG
A278 | Analog Timer | ANALOG | TIMER | FAN FAULT DELAY - FAN 1
A260 | Analog Timer SetPoint | ANALOG | ANALOG | FAN FAULT DELAY SETPOINT
OR
STATUS
ON
M1
-
7
-
2
| MINPUT | TROUBLE | FAN MECH BOARD FAULT
[END INPUTS]
[OUTPUTS]
TRACK
ON
PRI
=
9
,
9
P1265 | DIGITAL | TROUBLE | FAN #1 FAULT
[END OUTPUTS]
