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7.4 Faults
If a malfunction occurs, the module flashes and displays an error
message and a corresponding code.
1. Make a note of the code displayed.
The code is important for the correct and rapid diagnosis of the
type of failure and for any technical assistance that may be
needed.
2. Press the ? key. Follow the instructions displayed to solve the
problem.
3. Consult the meaning of the codes in the table below:
Code Faults Description Checking / solution
D03
D04
OUTL S.B FAIL.
OUTL S.C FAIL.
Circuit B flow sensor fault
Circuit C flow sensor fault
Remarks:
The circuit pump is running.
The 3-way valve motor on the
circuit is no longer powered and can
be adjusted manually.
Bad connection
4Check whether the sensor is connected: ¼See
chapter: "Deletion of sensors from the memory in
the PCB", page 62
4Check the link and the connectors
4Check that the sensor has been correctly fitted
Sensor fault
4Check the Ohmic value of the sensor
4Replace the sensor if necessary
D05 OUTSI.S.FAIL. Outside temperature sensor fault
Remarks:
The set point of the appliance is
equal to the maximum.
The valve setting is no longer
ensured but monitoring the
maximum temperature of the circuit
after the valve is ensured.
Valves may be manually operated.
Reheating the domestic hot water
remains ensured.
Bad connection
4Check whether the sensor is connected
4Check the link and the connectors
4Check that the sensor has been correctly fitted
Sensor fault
4Check the Ohmic value of the sensor
4Replace the sensor if necessary
D07 SYST.SENS.FAIL. System sensor fault Bad connection
4Check whether the sensor is connected: ¼See
chapter: "Deletion of sensors from the memory in
the PCB", page 62
4Check the link and the connectors
4Check that the sensor has been correctly fitted
Sensor fault
4Check the Ohmic value of the sensor
4Replace the sensor if necessary
bar
1
1
2
2
r
c
STD
('t
v
0 2 4 6 8 10 12 14 16 18 22 2420
pb
AUTO
x
c
r
j
M
gm
SUNDAY 11:45
TEMP. : 68°
PCU COM.FAIL D27
C002302-D-04
iSense Pro DIN - AD280 7. Troubleshooting
22/11/2012 - 300025649-001-01 60
61


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