10
x
Faults and malfunctions
FA ROTEX A1 BOe - 02/2014
51
Tab. 10-3 Fault codes (can be detected by switching panel PCB)
10.4 Rectifying burner faults and STB faults
Interlocking faults detected by the automatic firing can only be
reset manually directly on the boiler.
Unlocking the automatic firing unit:
Requirements: The cause of the malfunction is rectified, the
burner is electrically connected.
1. Switching ROTEX A1 BO on.
2. Push the Exit button (fig. 6.1, pos. 15) for at least 5 secs.
Î
Menu
"Special Level"
is displayed.
3. Select the
"FA failure"
level with the rotary switch.
Î
Fault code and request "Reset" is displayed.
4. Select "Yes" with the rotary switch.
5. Confirm the changes with a brief push of the rotary switch.
Î
Fault is reset.
6. Cancelling and jump back by pushing the Exit button again.
10.5 Emergency operation
In manual operation, the 3-way diverter valve is in the "Storage
tank charging" position first. On reaching the maximum ad-
justable storage tank temperature, the 3-way diverter valve is
switched to the "Heating" position.
If the 3-way diverter valve is faulty, the motor head of the valve
drive can be removed (see section 8.1.2). The diverter valve is on
the Heating setting.
Manual parallel operation of the heating circuit and hot water
storage tank can be set
temporarily
(see chapter 8.1.2)
In the event of faults or incorrect settings in the electronic
controller, emergency heating operation can be maintained.
1. Push the Exit button (fig. 6.1, pos. 15) for at least 5 secs.
Î
Menu
"Special Level"
is displayed.
2. Select the
"Manual Operation"
level with the rotary switch.
Î
The temperature scale, set and actual temperatures are
displayed.
3. Set the flow temperature with the rotary switch.
4. Confirm the changes with a brief push of the rotary switch.
Î
The ROTEX A1 BO operates manually at the set flow tem-
perature.
5. Cancelling and jump back by pushing the Exit button again.
Code
Component/Designation
Fault
Possible fault rectification
E75
Outside temperature sensor
Measured value outside measuring range,
temperature sensor defective.
Ɣ
Check cable, terminal and plug connec-
tions.
Ɣ
Replace the temperature sensor.
E76
Storage tank temperature
sensor
E81
EEPROM
Internal fault
Ɣ
Total reset
Ɣ
Replace switching panel PCB in controller.
E88
Switching panel PCB control-
ler
E91
Connected CAN modules
Bus detection of a CAN module doubly pre-
sent.
Ɣ
Set bus addresses correctly.
E100
Flue gas temperature sensor
Measured value outside measuring range,
sensor / temperature sensor defective.
Ɣ
Check cable, terminal and plug connec-
tions.
Ɣ
Replace the sensor / temperature sensor.
E129
Pressure sensor
E200
Communication automatic
firing
Fault in communication between automatic
firing and switching panel PCB on controller.
Ɣ
Check cable and plug connections.
Ɣ
Total reset
Ɣ
Replace switching panel PCB in controller.
Ɣ
Replace the combustion controller.
E8003
Flue gas temperature
The flue gas temperature has exceeded the
threshold temperature.
Ɣ
Clean the boiler
Ɣ
Check the flue gas temperature sensor.
E8004
The flue gas temperature has exceeded the
permissible absolute maximum value.
E8005
Water pressure
Measured value under permissible minimum
value.
Ɣ
Top up heating water.
Ɣ
Leak test
W8006
Warning message: Maximum permissible
pressure drop exceeded.
W8007
Warning message: Measured value over
permissible maximum value.
Ɣ
Check diaphragm expansion vessel.
Ɣ
Drain heating water.
WARNING!
Risk of burns due to very hot boiler body with STB
fault.
Ɣ
Do not touch any metallic parts on the boiler.
Ɣ
Let the boiler cool down.
Ɣ
Wear protective gloves.
The cause of the last fault is saved in the unit and can
be reconstructed on restarting the unit, even after
power failure.
