Faults; Troubleshooting - Bosch Greenstar ZBR 16-3 A Series Installation And Service Instructions For Contractors

17

Faults

17.1

Troubleshooting

DANGER:
Explosion!
▶ Close the gas cock prior to working on the gas train.
▶ Check for gas leaks after carrying out work on the gas train.
DANGER:
Risk of flue gas poisoning.
▶ Check for leaks after carrying out work on the venting system.
DANGER:
Risk of electric shock!
▶ Always disconnect the appliance from the mains power before
performing any work. Always disconnect the appliance from the
mains power before performing any work.
Take measures to prevent accidental reconnection.
WARNING:
Danger of scalding!
Hot water can scald.
▶ Drain the appliance before working on components that are water
filled.
NOTICE:
Risk of system damage from freezing!
The heating system can freeze up in cold weather if it has been disabled
by a fault shutdown.
▶ Rectify the fault immediately and restart the heating system.
▶ If this is not possible, protect your heating system from freezing by
draining the heating system and hot water pipes at the lowest point.
NOTICE:
The Heatronic boiler control can be damaged by leaking water.
▶ Cover the Heatronic prior to work on water filled components.
The Heatronic boiler control monitors all safety and control components.
If a fault arises during operation, an audible warning tone sounds.
Press a button to mute the warning sound.
The display indicates a fault code (e.g.
If the reset button is flashing:
▶ press the reset button and hold it until
The appliance starts up again and the current supply temperature is
displayed.
If the reset button is not flashing:
Greenstar – 6721822579 (2020/03)
) and the reset button flashes.
appears on the display.
▶ Switch the appliance OFF and ON again.
The appliance starts up again and the current supply temperature is
displayed.
An overview of the faults can be found on page 74.
An overview of the status codes can be found on page 72.
If the fault persists:
▶ Check the PCB and replace if required. Adjust the service functions
in accordance with the commissioning report ( page 78).
Faults
73