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17
USER GUIDE
codes
00
02
03-07
11
12
13-17
18
19
25
28
31
32
33
36
37
38
44
Error description
No flame detected
No ignition after 5 attempts
Internal error
Eprom error
Low water pressure or 24V fuse failure
Internal error
Primary temperature 1 > 110 °C
Primary temperature 2 > 110 °C
Primary temperature 1 gradient too high
No fan signal
Short circuit in temperature 1 sensor
Short circuit in temperature 2 sensor
Hot water temperature sensor
Temperature 1 sensor: circuit open
Temperature 2 sensor: circuit open
Hot water temperature sensor: circuit open
Internal error
Fault repair
- check wiring / - change electrode / - change MCBA
- check ignition electrode and its positioning
- if the problem persists after 2 resets, change the MCBA
- if the problem persists after 2 resets, change the MCBA
-top up the primary circuit
(see Using The Boiler - Heating System Pressure).
- call engineer to check fuse
- if the problem persists after 2 resets, change the MCBA
- check that sensor NTC1 is propely housed in its pocket
- if so, change sensor NTC1
- check that sensor NTC2 is propely housed in its pocket
- if so, change sensor NTC2
- check that the shunt pump is operating, and if so vent the boiler
- if the fan is turning:
• check the PWM connection
• if the problem persists after 2 resets, change the fan
• if the problem persists after 2 resets, change the MCBA
- if the fan is not turning:
• check the 230 Volt power to the fan
- change sensor NTC1
- change sensor NTC2
- change sensor NTC3
- check the connection of sensor NTC1 to the terminal strip
- if the problem persists, change sensor NTC1
- check the connection of sensor NTC2 to the terminal strip
- if the problem persists, change sensor NTC2
- check the connection of sensor NTC3 to the terminal strip
- if the problem persists, change sensor NTC3
- if the problem persists after 2 resets, change the MCBA
Safety shutdown
If an operating error develops, the system locks and the display
flashes: the first digit shows the sequence the burner was in when
the error occurred, the last two digits show the error code
(see table
below)
; the first digit and the next two flash alternately.
To reset the system:
• Press the “RESET” button on the MCBA display.
• If an error occurs again, call an approved heating engineer.
Table of error codes and corrective action