Swegon CLASS UNIT Operation & Maintenance Instructions Manual page 33

7.4 TYPE 4: ALARM INDICATING THE SYSTEM CANNOT FULFIL THE SETPOINT
- Conditions:
- Causes:
• The setpoint cannot be fulfilled because the upper or lower limit of the fan's working zone has been reached
- Effects:
S.11 "Constant Pressure" fan 1 - Measured pressure too high - Minimum air flow reached
S.12 "Constant Pressure" fan 1 - Measured pressure too low - Maximum air flow reached
S.13 "Constant Pressure" fan 3 - Measured pressure too high - Minimum air flow reached
S.14 "Constant Pressure" fan 3 - Measured pressure too low - Maximum air flow reached
S.20 "Demand control" fan 1 - Air flow too low - Reduce the pressure on this fan
S.21 "Demand control" fan 1 - Air flow too high - Minimum limit of the motor reached
S.22 "Demand control" fan 2 - Air flow too low - Reduce the pressure on this fan
S.23 "Demand control" fan 2 - Air flow too high - Minimum limit of the motor reached
S.24 "Demand control" fan 3 - Air flow too low - Reduce the pressure on this fan
S.25 "Demand control" fan 3 - Air flow too high - Minimum limit of the motor reached
S.34 "Constant Air Flow" fan 3 - Air flow too low - Reduce the pressure on this fan
S.35 "Constant Air Flow" fan 3 - Air flow too high - Minimum limit of the motor reached
AL1 relay
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7.5 TYPE 5: ALARM INDICATING A DATA FAILURE IN THE CONTROL CIRCUIT
- Conditions:
- Causes:
• Crucial data from the circuit board has been lost
- Effects:
D.10 Programme Error
D.20 Data Error
AL1 relay
Alarm status
- Solutions:
• Try a TOTAL RESET of the data using the advanced setup. If still not resolved, order a new circuit board.
Operation and maintenance
Displayed on HMI TACtouch
Text displayed
O.R.1
/
Displayed on HMI TACtouch
Text displayed
O.R.1
/
instructions – CLASS UNIT TAC5
TAC control board
LED ALARM
ON
Auto reset: yes
TAC control board
LED ALARM
ON
Auto reset: no
LED ALARM
RED
LED AF
/
LED ALARM
RED
LED AF
/ Stopped
LED Pa
/
Fans
/
LED Pa
/
Fans
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