Error Codes - Baxi ECOGEN 24/1.0 User Operating Instructions Manual

In the table below: - PCB = Main Control Board, BCU = Burner Control Unit.
UR = User Reset, AR = Automatic Reset, ARP = Automatic Reset after Power Down
NOTE: An automatic reset is only done if the fault condition has cleared.
Error code: Display
10: Outside sensor
20: Boiler flow sensor
40: Boiler return sensor
50: DHW tank sensor
60: Room sensor 1
65: Room sensor 2
83: BSB short-circuit
84: BSB address collision
85: Radio communication
91: Data loss in EEPROM
92: Device electronics error
95: Time of day invalid
96: Minor SW failure
97: SW or HW failure
127: Legionella temperature
157: Boiler Flow Overheat stat
158: Condensate
164: Flow
257: Pack sensor
258: Pack over- temp
259: CJC sensor
261: Loss of Engine flame
262: Loss of Supplementary flame
263: Engine BCU failure
264: Supp. BCU failure
265: BCU failure
270: excessive temp. diff.
274: Dry fire protection
278: Max Temp Rise
• After 10 minutes or after down power (ARP)
+ Will clear message if 65°C is achieved - does not inhibit appliance on.
18
© Baxi Heating UK Ltd 2010
Description
Fault outside temp sensor1
Fault boiler flow temp sensor
Fault return temp sensor boiler
Fault DHW1 sensor
Fault room temp sensor HC1
Fault room temp sensor HC2
Boiler system bus short-circuit
More then 1 room units are assigned to the same HC
Assign one of them to HC2 or assign QAA7x not as room unit
Communication to radio device interrupted
Failure in Class B-SW: Irreparable data loss in EEPROM
RAM failure, HBC processor register failure, blocking chain
undefined (toggling), safety chain discrepancy.
Reset: Press Service Reset within 20 seconds after Power up
The real time clock unit detected corrupted time of day.
Failure in Class B-SW: Stack overflow or program sequence failure
Failure in EGC-SW which causes non-volatile lock.
Legionella temperature not achieved within 48 hours
Boiler flow overheat thermostat / safety chain open
Condensate switch of safety chain opened
Low flow or faulty flow switch
Fault pack temp sensor
Internal ambient temperature to high
Fault cold junction compensation sensor
No flame after five ignition tries in Engine
No flame after five ignition tries in Supplementary
Multiple communication request of Engine Burner Control Unit
unsuccessful.
1) Failure caused by BCU
2) BCU Communication Timeout on Main Control Board
Multiple communication request of Supp. Burner Control Unit
unsuccessful.
1) Failure caused by BCU
2) BCU Communication Timeout on Main Control Board
Not supported in Main Control Board
Excessive max temperature difference across the heat exchanger
during 5 minutes or excessive limit temperature difference.
If temperature difference fell below (threshold - switching
differential boiler): automatic reset
- when the maximum setting was exceeded immediately
- when the limit value was exceeded after 10 minutes
Flow switch did not close within 4 minutes
Maximum flow temperature rise exceeded, automatic reset after
10 minutes

11.0 Error Codes

11.1 List of Error Codes
Lockout/Reset action
Eng
AR
AR
AR
AR
AR
AR
AR
AR
AR•
NRP
NRP
AR
NRP
AR+
UR
UR
AR
AR
AR
UR
ARP
AR
AR
UR
Sup
AR
AR
AR
AR
AR
AR
AR
AR
AR•
NRP
NRP
AR
NRP
AR+
UR
UR
AR
AR
UR
ARP
AR
AR
AR 10'
UR
AR 10'