10
Faults and malfunctions
Installation and operating instructions
53
Daikin/ROTEX A2 F
Oil condensing boiler A2 F
008.1546499_02 – 04/2018 – EN
Code
Component/Designation
Error
Possible fault rectification
E 72
Internal mixer sensor
Measured value outside measuring range, temper-
ature sensor defective.
▪ Check the cable, terminal and plug connections.
▪ Replace the temperature sensor.
E 75
External temperature
sensor
E 76
Storage tank temperature
sensor
E 81
EEPROM
Internal fault
▪ Total reset
▪ Replace the controller circuit board.
E 88
Controller circuit board
E 91
Connected CAN modules
CAN module bus ID duplicated.
▪ Configure the bus addresses correctly.
E 100
Flue gas temperature
Internal fault
▪ Replace the firing unit
E 129
Pressure sensor
Measured value outside measuring range, sensor
defective.
▪ Check the cable, terminal and plug connections.
▪ Replace the sensor.
E 198
Flow sensor
Volume flow too low
▪ Check the heating circulation pump / filter / heat-
ing network.
E 200
Communication firing unit
Communication lost between the firing unit and con-
troller circuit board.
▪ Check the cable and plug connections.
▪ Total reset
▪ Replace the A2 F circuit board.
▪ Replace the firing unit.
W8001 Flow sensor
Volume flow fell below the minimum limit
▪ Check the parameter settings (see control system
instructions).
▪ Check the pipes and valves for blockages.
▪ Check the integrated circulation pump.
E 8002
Throughput under minimum threshold (300 l/h)
W8003 Flue gas temperature
Flue gas temperature has exceeded the threshold
temperature.
▪ Clean the boiler.
E 8004
Flue temperature has exceeded the permissible ab-
solute maximum value.
E 8005 Water pressure
Measured value under permissible minimum value
▪ Top up the heating water.
▪ Leak test.
W8006
Warning message: Maximum permissible pressure
drop exceeded
W8007
Warning message: Measured value exceed per-
missible maximum value.
▪ Check the diaphragm expansion vessel.
▪ Drain the heating water.
Tab. 10-4
Fault codes (can be detected by the circuit board)
"Inside device:" "Boiler" is displayed for location information
10.4
Rectifying burner malfunctions
and STB malfunctions
DANGER: RISK OF BURNING
Risk of burns from very hot boiler body for STB malfunc-
tion.
▪ Do no let any metallic parts come into contact with the
boiler.
▪ Let the boiler cool down.
▪ Wear protective gloves.
INFORMATION
The cause of the last fault is saved in the device and can
be reconstructed, even after power failure, when the
device is restarted.
Locking faults detected by the firing unit can only be released manu-
ally directly on the boiler.
Unlocking the firing unit:
Requirements: The cause of the malfunction has been rectified, the
burner is connected to the electrical system.
1
Switch on the A2 F.
2
Push the Exit button (image 34, item 13) for at least 5 secs.
è
The
"
Special Level
"
menu is displayed.
3
Use the rotary button to select the
"
FA failure
"
level.
è
Fault code and "Reset?" request is displayed.
4
Use the rotary button to select "Yes".
5
Confirm the selection with a brief push of the rotary button.
è
Fault is reset.
6
Cancelling and jump back by pushing the Exit button again.
10.5
Emergency operation
Emergency heating operation can be maintained if the electronic
controller settings are incorrect by activating the special "
Manual
Operation" function on the controller (see enclosed "Controller Ro-
Con BF" operating instructions).
When the 3-way valves are intact, the A2 F switches to heating oper-
ation. The required inflow temperature can be adjusted with the
rotary switch.
