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7.6 TYPE 6: FIRE ALARM
- Conditions:
• Fire alarm input must be connected to a fire detection system
- Causes:
• Activation of fire alarm input, IN3, connected to a fire detection system.
IN3 can be configured to work as NO open contact by default or as NC if configured so in the advanced setup.
- Effects:
Displayed on HMI TACtouch
Text displayed
F.10
FIRE ALARM
F.11
End of the fire alarm
AL1 relay
O.R.1
Alarm status
/
* The fans are stopped by default in the event of a fire alarm but, via the advanced setup, it is
possible to configure a fixed airflow for supply (contact IN7 needs to be closed) and for exhaust
(contact IN8 needs to be closed).
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LED ALARM
RED
TAC control board
LED ALARM
LED AF
ON
/
Auto reset: no
Operation and maintenance
instructions – CLASS UNIT TAC5
7.7 TYPE 7: MAINTENANCE ALARM
- Conditions:
• the running hours feature must be enabled in advanced setup
- Causes:
• SERVICE ALARM: the fan operating time (in hours) has exceeded the configurable threshold
• STOP FAN: the fan operating time (in hours) has exceeded the configurable threshold. This alarm stops the fans
- Effects:
LED Pa
M.10
Maintenance 3 months
/
M.11
Maintenance 6 months
M.21
Operating hours
M.22
Operating hours - AHU off
Fans
AL1 relay
*
Alarm status
* unless the status has been changed in advanced setup
7.8 TYPE 8: ALARM INDICATING A COMMUNICATION BREAKDOWN
BETWEEN THE TAC CIRCUIT AND THE HMI
- Conditions:
• User interface is connected
- Causes:
• Communications failure between the TAC circuit and the HMI
- Effects:
CB COM ERROR
AL1 relay
Alarm status
Operation and maintenance
Displayed on HMI TACtouch
Text displayed
TAC control boards
O.R.1
LED ALARM
/
ON
Reset via "fan run time" (TACtouch) or "alarm menu" (App)
Displayed on HMI TACtouch
Text displayed
LED ALARM
TAC control board
O.R.1
LED ALARM
/
/
Auto reset: yes
instructions – CLASS UNIT TAC5
LED ALARM
LED Pa
RED
/
LED AF
Fans
Stopped if SERVICE STOP
/
*
FAN
LED Pa
Red
/
LED AF
Fans
/
/
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