DeDietrich AWHP MIT-IN iSystem User Manual

5.3 Faults (Code type Lxx or Dxx)
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
t
key. If the code is displayed again, switch off the boiler
and then switch it back on.
3. Press the ? key. Follow the instructions displayed to solve the
problem.
4. Consult the meaning of the codes in the table below:
Code
Faults Cause
of the
fault
Description Checking / solution
D03
D04
OUTL S.B FAIL.
OUTL S.C FAIL.
SCU 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
Sensor fault
4 Contact the professional who takes
care of maintenance of the appliance
D05 OUTSI.S.FAIL.
SCU Outside temperature sensor fault
Remarks:
The set point is equal to the MAX MIT
parameter.
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
Sensor fault
4 Contact the professional who takes
care of maintenance of the appliance
D07 AUX.SENS.FAIL.
SCU Auxiliary sensor fault Bad connection
Sensor fault
4 Contact the professional who takes
care of maintenance of the appliance
D09 DHW S.FAILURE
SCU Domestic hot water sensor fault
Remarks:
Heating of domestic hot water is no longer
ensured.
The load pump operates.
The tank load temperature is equal to the
temperature of the inside module.
Bad connection
Sensor fault
4 Contact the professional who takes
care of maintenance of the appliance
bar
1
1
2
2
r
c
STD
(
t
v
0 2 4 6 8 10 12 14 16 18 22 2420
p
b
AUTO
x
c
r
j
M
g
m
SUNDAY 11:45
TEMP. : 68°
PCU. COM. FAIL. D27
C002604-B-04
bar
1
1
2
2
r
c
STD
(
'
t
v
0 2 4 6 8 10 12 14 16 18 22 2420
p
b
AUTO
x
c
r
j
M
g
m
SUNDAY 11:45
TEMP. : 68°
PCU COM.FAIL D27
C002302-D-04
5. Troubleshooting AWHP MIT-IN iSystem
25
06/09/2012 - 300027618-001-01

DeDietrich AWHP MIT-IN iSystem Specifications

General

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