Rectifying Burner Faults And Stb Faults; Emergency Operation - Rotex A1 BG Installation And Maintenance Instructions Manual

Code Component/Designation
E75 Outside temperature sensor
Storage tank temperature
E76
sensor
E81 Eeprom
Switching panel PCB control-
E88
ler
E91 Connected CAN modules
E100 Flue gas temperature sensor
E129 Pressure sensor
Communication automatic
E200
firing
W8003
Flue gas temperature
E8004
E8005
W8006
Water pressure
W8007
Tab. 10-3 Fault codes (can be detected by switching panel PCB)

10.4 Rectifying burner faults and STB faults

WARNING!
Risk of burns due to very hot boiler body with STB
fault.
Do not touch any metallic parts on the boiler.
Let the boiler cool down.
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.
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 on.
2. Push the Exit button (fig. 6-1, item 15) for at least 5 secs.
Menu "Special Level" is displayed.
3. Select the "FA failure" level with the rotary switch.
Fault code and request "Reset" is displayed.
4. Select "Yes" with the rotary switch.
FA ROTEX A1 BGe - 02/2014
Fault
Measured value outside measuring range,
temperature sensor defective.
Internal fault
Bus detection of a CAN module doubly pre-
sent.
Measured value outside measuring range,
sensor / temperature sensor defective.
Fault in communication between automatic fir-
ing and switching panel PCB on controller.
The flue gas temperature has exceeded the
threshold temperature.
The flue gas temperature has exceeded the
permissible absolute maximum value.
Measured value under permissible minimum
value.
Warning message: Maximum permissible
pressure drop exceeded.
Warning message: Measured value over per-
missible maximum value.
10 x Faults and malfunctions
Possible fault rectification
Check cable, terminal and plug connec-
tions.
Replace the temperature sensor.
Total reset
Replace switching panel PCB in
controller.
Set bus addresses correctly.
Check cable, terminal and plug connec-
tions.
Replace the sensor / temperature
sensor.
Check cable and plug connections.
Total reset
Replace switching panel PCB in
controller.
Replace the combustion controller.
Clean the boiler
Check the flue gas temperature sensor.
Top up heating water.
Leak test
Check diaphragm expansion vessel.
Drain heating water.
5. Confirm the changes with a brief push of the rotary switch.
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, item 15) for at least 5 secs.
Menu "Special Level" is displayed.
2. Select the "Manual Operation" level with the rotary switch.
The temperature scale, set and actual temperatures are
displayed.
3. Set the flow temperature with the rotary switch, but do not
actuate
The ROTEX A1 operates manually at the set flow temper-
ature.
4. Cancelling and jump back by pushing the Exit button again.
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