Heatline CaprizPlus 28 - 15.4 Functional Flow Diagram; 15.4.1 Central Heating

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Fault
codes
Description Cause Solution
F73 Heating circuit pressure sensor fault The sensor is shorted or disconnected.
• Check the sensor’s connections.
• Check the sensor.
F74 Heating circuit pressure sensor fault Fault in pressure sensor
F76 Thermal fuse fault
Thermal fuse disconnected
Defective thermal fuse
• Check the fuses connections.
• Replace the heat exchanger.
F77 Fault in gas valve motor.
Defective gas valve.
Defective condensate pump (option)
• Check the gas valve connections.
• Check the operation of the gas valve.
• Check the operation of the condensate pump (option).
F83
No water in the installation : the temperature
does not increase when the burner is lit
Return water valve closed
Pump disconnected
Leak in the installation
• Fill the installation.
• Purge the installation.
• Check the pump connections.
• Check the  ow and return heating sensor
connections.
• Check that there are no leaks.
F84
Permanent temperature difference between
 ow and return heating sensors
Inverted or disconnected  ow and
return heating temperature sensors
Defective temperature sensors
• Check temperature sensors connections.
• Replace faulty sensors.
F85 Flow and return heating sensors fault
Flow and return heating temperature
sensor connected to same tube
• Check temperature sensors connections.
F86 Under oor heating contact fault
Floor heating contact open
Sensor disconnected or defective
• Check the sensor connections.
• Check that the sensor is connected to the main
board and the shunt is removed.
Err User interface fault Defective user interface
• Check connection from user interface PCB to main
PCB.
• Replace user interface.
15.4 Functional  ow diagram
15.4.1 Central Heating