Operating instructions
56
Daikin RoCon
Daikin Control unit
008.1543999_00 – 03/2017 – EN
7 x Errors and faults
Code Component/Designation Error
E1
Firing unit
Temporary fault, burner
shut-down, automatic re-
lease when error condition
no longer active.
T-HS exceeds limiter temperature (excessive temperature, no heat dissipation).
E2 T-Return exceeds limiter temperature (excessive temperature, no heat dissipation).
E6 T-HS (t
V
) is higher than the set maximum boiler temperature ([Max T-HS] parameter + 5 K).
E12
T-HS or T-Return sensor: Measured value outside measuring range, temperature sensor
defective.
E17 Spread (t
V
- t
R
) too large.
E32
Undervoltage in the 230 V mains voltage or 18 V internal DC voltage (electronics error, switch
device on/off).
E43 T-Return (t
R1
) is higher than T-HS (t
V1
) + 12 K for longer than 5 s.
E44 T-HS increase too rapid.
E45 Spread (t
V1
- t
R1
) too large.
E66 Interruption during calibration (no heat dissipation, minimum calibration time not met).
E90
Communication interrupted between firing unit and control unit switching panel PCB (check
cable and plug connections, total reset, replace control unit switching panel PCB, replace fir-
ing unit).
E96 5x reset within 15 min. Another reset is not possible until after a further 15 min.
E98
Error found in the flame amplifier evaluation during the idle state check (electronics error,
short circuit of ionisation electrode or cable).
E99 Internal error of the firing unit.
E4
Firing unit
Temporary fault, device is
attempting to restart
1-4x no flame formation at the end of the safety time (no gas, valves do not open, no ignition
sparks)
E5 Flame failure in flame stabilisation (ionisation electrode defective or dirty).
E10 Flame failure at the end of the safety time (ionisation electrode defective or dirty).
E10 5x reset within 15 min. Repeat reset only possible after 15 min.
E19 T-HS increase too rapid.
E24
Value exceeds/falls below min. and max. limits during flame stabilisation or control operation
(blower defective, power supply to blower, electronics error in blower, cable break).
E48 No communication with the firing unit for more than 2 min.
E50
BCC activation or flame failure in regular operation (no gas, wind effect, safety gas control
block supply).
E61
Control deviation of the ionisation current too high (1st error) (faulty burner earthing or firing
unit voltage supply, gas flow pressure too low, ionisation electrode bent or oxidised, ionisation
track faulty, safety gas control block defective)
E62
– Impermissible gas fitting initialisation during 10 s (1st error) or
– blower falls below 80 % of the minimum speed within 10 s (one-off error).
(Burner blower defective, incorrect gas type set, missing/wrong gas nozzle, safety gas con-
trol block defective, gas flow pressure too low)
E63 Internal electronics error - 1st error (switch device on/off).
E66
Interruption during calibration (1st error) (no heat dissipation, minimum calibration time not
met).
E68 Impermissible GPV offset value (safety gas control block defective).
E69
During adjustment, no stable state reached in partial load within the tolerance period (wind
effect, speed fluctuations, blower).
Tab. 7-2 Error code of non locking faults (can be detected by the firing unit)
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