Bosch GWH15, Инструкция по установке и эксплуатации

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6 720 819 528 (2016/02) Therm 4000 S
Problems | 21
9 Problems
Fitting, maintenance and repair must only be carried out by qualified contractors. The following table describes the solutions for
possible problems (solutions followed by * must only be carried out by qualified contractors).
Display Description Solution
A0 Cold and hot water temperature sensor damaged. ▶ Check temperature sensor and associated
connections.
1)
▶ Call a qualified contractor.
A1 Temperature inside the box very high (external
temperature too high, combustion chamber
calcified). The appliance automatically regulates the
performance of the appliance to avoid
overheating.
A4 Air temperature sensor of the box faulty. ▶ Check temperature sensor and associated
connections.
1)
A7 Hot water temperature sensor faulty. ▶ Check temperature sensor and associated
connections.
1)
A9 Hot water temperature sensor is not fitted properly.
Incoming gas pressure low.
▶ Check fitting.
▶ Check incoming pressure.
1)
C7 Fan not working. ▶ Check fan connections.
▶ Close and open a hot water tap.
CA Water flow above maximum value specified. ▶ Check water filter.
CF
C1
Blockage of gases coming out of the combustion.
Air flow sufficient for start-up.
▶ Remove dirt or any other impediment in the
flue/intake pipe.
▶ Close and open a hot water tap.
If the problem persists, call a qualified contractor.
E0 Breakdown in the electrical box ▶ Press the reset button.
If the problem persists, call a qualified contractor.
E1 Hot water temperature sensor detects overheating. ▶ Let the appliance cool and try again.
If the problem persists, call a qualified contractor.
E2 Cold water temperature sensor faulty. ▶ Check sensor and associated connections.
1)
E4 Hot water temperature sensor detects overheating
(leaking combustion products inside the combustion
chamber). ▶ Disconnect the appliance.
▶ Call a qualified contractor.
E9 Thermofuse. ▶ Call a qualified contractor.
EA Flame not detected. ▶ Check the pressure of the gas supply to the
mains connection, the ignition electrode and
the ionisation electrode.
▶ Press the reset button.
EE Modulating Solenoid valve disconnected. ▶ Check connections.
1)
EF Wrong gas connection. Natural gas appliance supplied with liquid gas.
F7 A flame is detected although the appliance is
switched off. ▶ Check the electrodes and the cable.
▶ Check the printed circuit board.
1)
▶ Press the reset button.
Table 11