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46
Operation and maintenance instructions – v2.8.8 & 2.7.3
- Conditions:
- Causes:
•
One or more of the T° sensors T1/T2/T3 connected to the TAC5 circuit and mounted on heat exchanger is
defect or not connected. These sensors are needed for the bypass control and the anti-frost procedure.
- Effects:
- Conditions:
• Only with internal water heating coil (IBA) option
- Causes:
• T° sensor T4 located on the coil and connected to the TAC5 circuit is defective (open or short circuit) or not connected.
This is used to prevent frosting of the internal heating coil. In this case, as a safety measure, the 3-way valve is
opened and the circulator contact is closed.
- Effects:
*
unless the status has been changed in advanced setup
8.9 TYPE 9: ALARM INDICATING A T° SENSOR T1/T2/T3 FAILURE
8.10 TYPE 10: ALARM INDICATING FAILURE ON T° SENSOR T4
Displayed on HMI
Text displayed
LED ALARM
LED Pa
T.10
Sensor T1 disconnected
RED
/
T.11
Sensor T1 short circuit
T.20
Sensor T2 disconnected
T.21
Sensor T2 short circuit
T.30
Sensor T3 disconnected
T.31
Sensor T3 short circuit
Displayed on HMI
Text displayed
LED ALARM
LED Pa
T.40
Sensor T4 disconnected
RED
/
T.41
Sensor T4 short circuit
TAC5 control board
AL1 relay
O.R.1
LED ALARM
LED AF
Fans
Alarm status
/
ON
/
Stopped
Manual reset mandatory.
TAC5 control board
AL1 relay
O.R.1
LED ALARM
LED AF
Fans
Alarm status
/
ON
/
/
Manual reset mandatory.
Содержание GLOBAL LP FW
Страница 15: ...15 Operation and maintenance instructions v2 8 8 2 7 3 4 3 INTERNAL WIRING DIAGRAM GLOBAL PX...
Страница 16: ...16 Operation and maintenance instructions v2 8 8 2 7 3 4 4 INTERNAL WIRING DIAGRAM GLOBAL RX TOP...
Страница 17: ...17 Operation and maintenance instructions v2 8 8 2 7 3 4 5 INTERNAL WIRING DIAGRAM GLOBAL LPFW...
Страница 59: ......
Страница 60: ...We make every breath count Version 27 09 2018 We reserve the right for changes...