Daikin D2CND028A1AA Servicing Manual page 41

ERROR
REASON
CODE
Flow tem-
81-01 perature
sensor fault
DHW solar
81-65 temperature
sensor fault
Freeze pro-
8A-46
tection
Flow tem-
8H-64 perature
steep rise
Flow-return
temperature
8H-65
difference
too much
Flame detec-
tion before
E1-64
burner
operation
Internal
E1-65 SCOT sys-
tem error
Calibration
E1-66 conditions
fault
Missing
E1-67
calibration
Ion base
value is
outside the
E1-68
factory limits
or saved
incorrectly
Parameter
E1-69
CRC error
D2CND028A1AA + D2CND028A4AA + D2CND035A1AA +
D2CND035A4AA + D2TND028A4AA + D2TND035A4AA
Wall-mounted condensing boiler
ESIE17 - 09 / 2017.11
ELIMINATION
Check continuity between the sen-
sor and PCB, replace wire harness
if necessary. Check flue tempera-
ture sensor resistance using a
multimeter connected across the
thermistor's terminal pins.
Boiler operates as if Solar NTC
is not connected but, since DHW
inlet is fed by solar tank, uncorfort-
able situations may occur. Check
solar sensor resistance using a
multimeter connected across the
thermistor's terminal pins. Check
cable connections of the sensor.
Replace defective part.
Appliance does not operate if flow
temperature sensor reads value
less than 1°C.
Wait until flow temperature ex-
ceeds 1°C. Tell the customer not to
cut off electric supply to the boiler.
Fully open the isolating valves.
Open the radiator valves. Check if
pump is operating and check the
electrical connections to the pump.
Replace defective part.
Check minimum pump capac-
ity (parameter P07) and max
pump capacity (parameter P08),
increase them if needed. Check if
pump is operating and check the
electrical connections to the pump.
Replace defective part.
Check ignition and ionization elec-
trodes and ignition transformer,
replace the defective part if there
are any. If problem is still present,
replace the PCB.
Reset the boiler and monitor the
ignition and operation process.
Activate manual calibration if error
is still present and monitor the
ignition and operation. Activate
calibration process manually.
Check ionization electrode, reflace
if defective. If error does not disap-
perar, replace the PCB.
Make a manual calibration.
Reset the boiler. Make a manual
calibration.
Reset the boiler Make a manuel
calibration.Check the ionization
elecktrode, it's cable connection
and it's earth cable.Replace, if
defective.
Reset the boiler. Make a manual
calibration. If problem repeats,
replace the PCB.
ERROR
REASON
CODE
Parameter
E1-70
CRC error
EK lockout
E1-71
failure
SCOT flame
E1-72
amplifier
Internal PCB
E1-73
error
Outside sen-
H9-01
sor fault
DHW
HC-01 temperature
sensor fault
High system
HJ-08
pressure
Low system
HJ-09
pressure
Water pres-
HJ-10 sure sensor
fault
Flow tem-
perature
J6-01
sensor over-
heating
10 Troubleshooting
ELIMINATION
Reset the boiler. Make a manual
calibration. . If problem repeats,
replace the PCB.
Reset the boiler. Make a manual
calibration. . If problem repeats,
replace the PCB.
Reset the boiler Make a manuel
calibration.Check the ionization
elecktrode, it's cable connection
and it's earth cable.Replace, if
defective.
Perform reset. If error takes place
frequently, replace the PCB.
Boiler operates as if outdoor sen-
sor not connected. Check outdoor
NTC sensor resistance using a
multimeter connected across the
thermistor's terminal pins, replace
if defective. Check cable con-
nections of the sensor, replace if
defective.
Boiler continues supplying
domestic hot water even if DHW
sensor is defective but for accu-
rate DHW temperature, check
DHW NTC sensor and electrical
connections of it for interruptions,
replace if defective.
Drain the boiler down to at least
0.8 bar. Boiler will automatically
run when pressure value goes be-
low 2.8 bar, reset is not needed.
Fill the system up to 0.8 bar.
Boiler will automatically run when
pressure value goes above 0.8
bar, reset is not needed.
Check pressure sensor and its
cable connection for interruptions,
replace if defective.
This can be a blocking error or
lockout error, reset the boiler if it
is lockout. Open radiator valves if
they are closed to allow enough
circulation of water. Check if the
pump is operating and check the
cable connections to the pump.
Replace if they are defective.
Check flow NTC sensor resis-
tance using a multimeter con-
nected across the thermistor's
terminal pins, replace the sensor
if it is not as desired.
Servicing manual
41