9.1.2
Messages (
-type codes))
1. The display shows:
The symbol (!)
The reset symbol
The malfunction code (for example
).
2. After resolving the malfunction, press the reset key for two seconds.
If the error code is still shown, find the cause in the table of errors
and apply the solution.
List of
type codes
Tab.16
Code
Description
Checking / solution
The parameter storage unit for the PCB is defec
tive
Replace the PCU PCB.
The middle domestic hot water temperature sensor
has short-circuited
Note
Domestic hot water production is not
guaranteed
Bad connection
Check whether the sensor is connected
Check the link and the connectors
Check that the sensor has been correctly fitted
Sensor failure
Check the Ohmic value of the sensor
Replace the sensor if necessary
The middle domestic hot water temperature sensor
is open
Note
Domestic hot water production is not
guaranteed
Bad connection
Check whether the sensor is connected
Check the link and the connectors
Check that the sensor has been correctly fitted
Sensor failure
Check the Ohmic value of the sensor
Replace the sensor if necessary
The room temperature sensor is has short-circuit
ed
Note
Domestic hot water production is en
sured by the back-up, if the back-up is
authorised
Bad connection
Check whether the sensor is connected
Check the link and the connectors
Check that the sensor has been correctly fitted
Sensor failure
Check the Ohmic value of the sensor
Replace the sensor if necessary
The room temperature sensor is open
Note
Domestic hot water production is en
sured by the back-up, if the back-up is
authorised
Bad connection
Check whether the sensor is connected
Check the link and the connectors
Check that the sensor has been correctly fitted
Sensor failure
Check the Ohmic value of the sensor
Replace the sensor if necessary
Fig.52
C003212-B
2"
1
4
3
4
1
2
MENU
MODE
9 Troubleshooting
58
300026515 - v09 - 25072017