Baxi ECOGEN 24/1.0, Installation & Servicing Instructions Manual

Page: 76 / 94

Fig. 80
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17.3 Error Codes
Below are shown the error codes which will be displayed on the THINK Controller if a fault occurs on the appliance. Error Codes shown on remote interfaces may be collective
codes ­ refer to the THINK Controller for the exact error message. More than one error may be present so that subsequent error codes will be shown as the original error is reset.
The occurrence of an error code will prevent some or all of the operations of the appliance.
Error codes specific to the running of the engine will not prevent the supplementary burner from operating and visa verse.
There are three levels of error code with associated reset procedures as follows: ­
1. Automatic reset ­ (AR) Examples are mainly to do with temperature sensing but also include monitoring of the mains supply. Automatic reset only occurs if the fault
condition is eliminated.
2. User reset ­ (UR) An example would be the restoration of the gas supply to enable ignition.
3. Service reset ­ (SR) arises when a reset of the condition needs to be accompanied by the attendance of a service engineer.
There are two special conditions: ­
1. Automatic reset after power down ­ (ARP) an automatic reset can only occur after the electrical supply is interrupted. Usually this implies data corruption and is in effect
a 'reboot' of the PCB.
2. No restart possible ­ (NRP) occurs if there is corruption of stored data for instance and implies that the PCB will have to be replaced.
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17.4 List of Error Codes
In the table below: ­ PCB = Main Control Board, BCU = Burner Control Unit.
Error code:
Display Description Lockout/Reset
action
Fault
Section
Eng Sup
10: Outside
sensor Fault outside temp sensor AR AR B
20: Boiler
sensor 1 Fault boiler flow temp sensor AR AR C
40: Return
sensor 1 Fault return temp sensor boiler AR AR C
50: DHW tank
sensor Fault DHW1 sensor AR AR B
60: Room
sensor 1 Fault room temp sensor HC1 AR AR B
65: Room
sensor 2 Fault room temp sensor HC2 AR AR B
83: BSB short­
circuit Boiler system bus short­circuit AR AR B
84: BSB
address
collision More then 1 room units are assigned to the same HC Assign one of them to HC2 or
assign QAA7x not as room unit ARP ARP B
85: Radio
communication Communication to radio device interrupted AR AR B
91: Data loss
in EEPROM Failure in Class B­SW: Irreparable data loss in EEPROM NRP NRP B
92: Device
electronics
error RAM failure, HBC processor register failure, blocking chain undefined (toggling), safety
chain discrepancy. Reset: Press Service Reset within 20 seconds after Power up NRP NRP B
95: Time of
day invalid The real time clock unit detected corrupted time of day. B
96: Minor SW
failure Failure in Class B­SW: Stack overflow or program sequence failure AR AR B
97: SW or HW
failure Failure in EGC­SW which causes non­volatile lock. NRP NRP B
102: Clock
without backup The charging of the clock backup ran out AR AR B
114: Shut'd
flue gas Shutdown due to flue gas thermostat of safety chain SR SR D