DeDietrich AWHP MIT-IN iSystem User Manual

Code Faults Cause
of the
fault
Description Checking / solution
D11
D12
D13
ROOM S.A FAIL.
ROOM S.B FAIL.
ROOM S.C FAIL.
SCU A room temperature sensor fault
B room temperature sensor fault
C room temperature sensor fault
Note:
The circuit concerned operates without any
influence from the room sensor.
Bad connection
Sensor fault
4 Contact the professional who takes
care of maintenance of the appliance
D14 MC COM.FAIL
SCU Break in communication between the SCU
PCB and the radio module
Bad connection
4 Check the link and the connectors
Boiler module failure
4 Change the boiler module
D15 ST.TANK S.FAIL
SCU Storage tank sensor fault
Note:
The hot water storage tank reheating
operation is no longer assured.
Bad connection
Sensor fault
4 Contact the professional who takes
care of maintenance of the appliance
D16
D16
SWIM.P.B. S.FAIL
SWIM.P.C. S.FAIL
SCU Swimming pool sensor fault circuit B
Swimming pool sensor fault circuit C
Note:
Swimming pool reheating is always done
during the circuit's comfort period.
Bad connection
Sensor fault
4 Contact the professional who takes
care of maintenance of the appliance
D17 DHW 2 S.FAIL
SCU Sensor fault tank 2 Bad connection
Sensor fault
4 Contact the professional who takes
care of maintenance of the appliance
D18 ST.TANK S.FAIL
SCU Solar tank sensor fault Bad connection
Sensor fault
4 Contact the professional who takes
care of maintenance of the appliance
D19 SOL.COL.S.FAIL
SCU Header sensor fault Bad connection
Sensor fault
4 Contact the professional who takes
care of maintenance of the appliance
D20 SOL COM.FAIL
SCU Interruption in communication between the SCU PCB and the solar control system
4 Contact the professional who takes care of maintenance of the appliance
D27 PCU COM. FAIL
SCU Communication failure between the SCU and PCU PCBs
4 Contact the professional who takes care of maintenance of the appliance
D32 5 RESET:ON/OFF
SCU 5 resets done in less than an hour
4 Switch off heat pump and start up again
D37 TA-S SHORT-CIR
SCU The Titan Active System® is short-circuited
4 Check that the connection cable between the SCU PCB and the anode is not short-
circuited
4 Check that the anode is not short-circuited
Remarks:
Domestic hot water production has stopped but can nonetheless be restarted using key
r.
The tank is no longer protected.
If a tank without Titan Active System® is connected to the heat pump, check that the
TAS simulation connector (delivered in package AD212) is fitted to the sensor board.
AWHP MIT-IN iSystem 5. Troubleshooting
06/09/2012 - 300027618-001-01
26

DeDietrich AWHP MIT-IN iSystem Specifications

General

Brand	DeDietrich
Model	AWHP MIT-IN iSystem
Category	Heat Pump
Language	English