D2CND024A1AA + D2CND024A4AA + D2TND012A4AA +
D2TND018A4AA + D2TND024A4AA
Wall-mounted condensing boiler
ESIE17-09 / 2017.11
Servicing manual
42
ERROR
CODE
REASON ELIMINATION
E1-70
E1-71
failure
E1-72
defective.
E1-73
error
H9-01
-
sor fault
-
multimeter connected across the
-
defective.
DHW
sensor fault
domestic hot water even if DHW
sensor is defective but for accu-
HJ-08
High system
Drain the boiler down to at least
0.8 bar. Boiler will automatically
-
HJ-09
Low system
Boiler will automatically run when
HJ-10
-
sure sensor
fault
J6-01
Flow tem-
sensor over-
heating
they are closed to allow enough
-
tance using a multimeter con-
if it is not as desired.
10 Troubleshooting
ERROR
CODE
REASON ELIMINATION
81-01
Flow tem-
sensor fault
-
-
ture sensor resistance using a
multimeter connected across the
81-65
DHW solar
sensor fault
-
solar sensor resistance using a
multimeter connected across the
cable connections of the sensor.
8A-46
-
tection
-
8H-64
Flow tem-
8H-65
Flow-return
difference
too much
-
E1-64
Flame detec-
tion before
burner
-
E1-65
Internal
-
tem error
Reset the boiler and monitor the
Activate manual calibration if error
-
E1-66
conditions
fault
E1-67
Missing
calibration
calibration.
E1-68
Ion base
value is
outside the
factory limits
or saved
incorrectly
defective.
E1-69
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