Daikin D2CNL024A1AA - Page 9

7 Error codes
Operation manual
9
D2CNL024A1AA
Wall-mounted condensing boiler
3P469438-12N – 2020.07
# Problem Solution
1J-64 High limit thermostat
signalise overheating
▪ Check the valves of the radiators
in the heating circuit.
▪ Check the combi boiler water
pressure. If it is low, fill the heating
circuit with water.
▪ Perform reset. If problem repeats,
contact your service agent.
80-01 Return temperature
sensor fault
Perform reset. If problem repeats,
contact your service agent.
81-01 Flow temperature
sensor fault
Perform reset. If problem repeats,
contact your service agent.
81-65 Domestic hot water
solar temperature
sensor fault
Boiler continues operation but solar
sensor is defective. Contact your
service agent.
8A-46 Freeze protection Unit does not operate if flow
temperature sensor reads value less
than 1°C. Wait until the error code is
removed from the screen.
8H-64 Flow temperature
steep rise
Make sure radiator valves are open
enough to circulate water. Your
boiler will operate again after a while.
If problem repeats, contact your
service agent.
8H-65 Flow-return
temperature
difference too much
Make sure radiator valves are open
enough to circulate water. If problem
repeats, contact your service agent.
E1-64 Flame detection
before burner
operation
Perform reset. If problem repeats,
contact your service agent.
E1-69 Parameter CRC error Perform reset. If problem repeats,
contact your service agent.
E1-71 EK lockout failure Permanent error. Contact your
service agent.
E1-73 Internal PCB error Perform reset if needed. If problem
repeats, contact your service agent.
H9-01 Outside sensor fault Boiler continues operation but
outside sensor is defective. Contact
your service agent.
HC-01 Domestic hot water
temperature sensor
fault
Boiler continues operation but you
must contact your service agent.
HJ-08 High system pressure Discharge water down to 0.8bar.
(You can bleed the radiators.)
HJ-09 Low system pressure Increase the system pressure to
0.8bar
HJ-10 Water pressure
sensor fault
Contact your service agent.
J6-01 Flow temperature
sensor overheating
(Can be a blocking
error or a lockout
error)
▪ Check the valves of the radiators
in the heating circuit.
▪ Check the combi boiler water
pressure. If it is low, fill the heating
circuit with water.
▪ Perform reset if needed. If problem
repeats, contact your service
agent.
J6-21 Return temperature is
higher than flow
temperature
No reset needed, burner operates
itself after a small amount of time. If
problem repeats, contact your
service agent.
JJ-64 Flue temperature
sensor fault
Perform reset. If problem repeats,
contact your service agent.
# Problem Solution
U4-67 Remote reset
supervision
Switch off - switch on power mains. If
problem repeats, contact your
service agent.