Fault Conditions - Bosch External System 12/18 Users Instructions And Customer Care Manual

Using your boiler

2.2.5 Fault conditions

The 'Boiler mode' and 'Lockout' lights can indicate some basic
fault conditions:
1. Accessing controls:
▶ Undo the screws on the bottom of the front panel using the
tool provided. The panel can be removed by pulling out at
the base and then sliding down to disengage from the lid.
2. Normal operation:
Boiler mode light ON
The appliance is in boiler mode, with a demand for heat from
the controls.
3. Both lights ON:
Boiler not firing
▶ Check the level in the oil tank.
▶ Press the Reset button (A). The boiler should fire.
▶ If there is no response, wait 2 minutes and press the Reset
Button (A) again.
▶ If Lockout light stays on, do not attempt further resets.
Contact your Service Engineer for advice.
4. Boiler mode light ON, lockout light OFF:
Boiler not on - No heating/hot water
▶ Press Reset Button (B), press Reset Button (C) both are
below the fascia.
▶ If the boiler remains off, contact your Service Engineer for
advice.
▶ If this fault re-occurs contact your Installer or Service
Engineer.
5. Both lights OFF:
Boiler not on - No heating / hot water
▶ Ensure there is power supply to the boiler.
▶ Check the programmer is set to ON and thermostat is
calling for heat.
▶ Ensure that the Service switch is in Boiler mode.
▶ If there is power supply to the boiler contact your service
engineer for advice.
6
1. Accessing controls
2. Normal operation
flue
reset
3. Both lights ON
flue
reset
4. Boiler mode light ON, Lockout light OFF
flue
reset
5. Both lights OFF
flue
reset
Danesmoor External & External System – 6 720 809 792 (2013/10)
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service
boiler
reset
on
service
boiler
reset
on
service
boiler
reset
on
service
boiler
reset