Troubleshooting Service Faults - Baxi Eco5 Compact+ Operating And Installation Instructions

14. TROUBLESHOOTING SERVICE FAULTS

The faults shown on the display are identified with the symbol "E" and a number (fault code). For a
complete list of faults, see the following table.
If "R" appears on the display the fault must be RESET by the user.
To reset, press and hold down
Centre.
CODE
FAULT
DISPLAYED
E01 Shut down for ignition
failure.
E02
Shut down by safety
thermostat.
E03 Flue thermostat tripped.
E04 Safety error due to ignition
failure or frequent flame
loss.
E05 Flow sensor failure.
E06 DHW sensor fault.
E08 Error in the flame
amplification circuit.
E09 Error in the gas valve
safety circuit.
E10 No hydraulic pressure
switch enable.
E22 Switching off due to power
supply reductions.
E25
No water safety trip.
E26 CH delivery NTC probe
overheating safety trip.
7217473.07 (1-11/17)
for at least 2 seconds. If this fault persists, call the Authorised Service
POSSIBLE REASON
• No inlet gas pressure.
• Ignition switch-flame sensor wire
interrupted.
• Flame sensing electrode faulty or
incorrectly positioned.
• Gas valve faulty.
• Electronic board faulty.
• No water in the primary circuit
(pump blocked or exchanger
obstructed).
• Limit thermostat faulty.
• Limit thermostat wiring
interrupted.
• CH flow NTC probe faulty.
• Electronic board faulty.
• Flue duct obstructed.
• Flue thermostat faulty.
• Flue thermostat wiring
interrupted.
• See the reasons indicated in E01.
• See the reasons indicated in E42.
• CH flow NTC probe faulty (circuit
open or shorted).
• CH flow probe wiring interrupted
or shorted.
• DHW flow NTC probe faulty
(circuit open or shorted).
• DHW flow probe wiring
interrupted or shorted.
• The electronic board is not
earthed.
• Electronic board faulty.
• Electronic board faulty.
• CH circuit pressure < 0.5 bar
• Hydraulic pressure switch faulty.
• Hydraulic pressure switch wiring
faulty.
• Supply voltage V < 162V
(automatic reset at V> 168V)
• Electronic board faulty.
• No water in the CH circuit
(pump blocked or exchanger
obstructed).
• CH flow NTC probe faulty.
• Electronic board faulty.
• See the reasons indicated in E25. • See the actions indicated in E25.
• Check that the gas valve is open and there is no air in
the gas supply circuit.
• Check the gas supply pressure.
• Check the wire is uninterrupted and makes good
contact with the flame sensing electrode and the
ignition switch.
• Check the connections between the gas valve and the
electronic board.
• Check the flame sensing electrode is in good
condition and in the right position (see the
POSITIONING THE IGNITION AND FLAME-
SENSING ELECTRODE section).
• Check pump operation (unscrew the front cap and
release the pump impeller with a screwdriver).
• Check the pump power input wiring.
• Check that the limit thermostat is undamaged and
replace it if necessary.
• Check the continuity of the limit thermostat wiring.
• Check the CH flow NTC probe (*).
• Check whether the exchanger is clogged.
• Make sure the flue ducts are not obstructed and have
been correctly installed.
• Check that the flue thermostat is undamaged and
replace it if necessary.
• Check the continuity of the flue thermostat wiring.
• See the actions indicated in E01.
• See the actions indicated in E42.
• Check the CH flow NTC probe (*).
• Check the continuity of the CH flow probe wiring.
• Make sure the wiring has not shorted.
• Check the DHW NTC probe (*).
• Check the continuity of the DHW probe wiring
• Make sure the wiring has not shorted.
• Check the continuity of the earth connections between
the electronic board (X4 connector) and the power
supply terminal block.
• Replace the electronic board.
• If the pressure in the CH circuit is < 0.5 bar, perform
filling (see the FILLING THE SYSTEM section).
• Check the hydraulic pressure switch works correctly.
• Check the continuity of the hydraulic pressure switch
wiring
• Check whether the power supply reductions are due
to reasons other than the boiler. If so, contact the
electricity provider.
• Check pump operation (unscrew the front cap and
release the rotor with a screwdriver).
• Check the pump power input wiring.
• Check the CH flow NTC probe (*).
• Check whether the exchanger is clogged.
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SERVICE ACTION