Faults That Are Not Shown On The Display - Bosch Greenstar combi 100 p Installation And Service Instructions For Contractors

58 | Faults
Display Description
FA After switching gas off: Flame is detected.
Fd Reset button pressed by mistake.
Temperature gradient limiter: Temperature rise too fast ▶ Fully open service shut-off valves.
Table 32 Faults shown on the display
16.3

Faults that are not shown on the display

Appliance faults
Combustion noise too loud; rumbling noises
Flow noises
Heating-up takes too long
Flue gas readings incorrect; CO levels too high
Violent ignition, poor ignition
DHW has unpleasant odor or has a dark color
Set supply temperature (e.g. of the FW 200 control)
exceeded
Condensate in air box
DHW outlet temperature is not reached
Heatronic is flashing (i.e. all buttons, all display segments,
burner indicator etc. are flashing)
Table 33 Faults not shown on the display
6720872361 (2017/04)
Elimination
▶ Check gas valve; replace if defective.
▶ Clean condensate trap.
▶ Check electrodes and leads; replace if defective.
▶ Check flue gas system; clean or repair if defective.
▶ Press reset button again.
▶ Check cable harness to safety high limit and gas cock for ground
connection.
▶ Check electrical connection between heating zone pump and Heatronic.
▶ Check pump plug connection per installation instructions.
▶ Manually test operation of heating zone pump and replace if defective.
▶ Set pump speed correctly to match maximum output.
Elimination
▶ Insert code plug correctly; replace if defective.
▶ Check gas type.
▶ Check inlet gas pressure; adjust if defective.
▶ Check flue gas system; clean or repair if defective.
▶ Check gas/air ratio in the combustion air and flue gas; replace gas valve if defective.
▶ Set pump speed correctly to match maximum output.
▶ Set pump mode.
▶ Set pump speed correctly to match maximum output.
▶ Set pump mode.
▶ Check gas type.
▶ Check inlet gas pressure; adjust if defective.
▶ Check flue gas system; clean or repair if defective.
▶ Check gas/air ratio in flue gas; replace gas valve if defective.
▶ Check gas type.
▶ Check inlet gas pressure; adjust if defective.
▶ Check power supply.
▶ Check electrodes for visual damage; replace if defective.
▶ Check flue gas system; clean or repair if defective.
▶ Check gas/air ratio; replace gas valve if defective.
▶ Check gas valve; replace if defective.
▶ Check burner; replace if required.
▶ Perform thermal disinfection of the DHW circuit.
▶ Replace sacrificial anode in the tank (if installed).
▶ Consult local water department.
▶ Switch off automatic anti-cycle timer, i.e., set value to 0.
▶ Set the required anti-cycle timer, e.g. default setting of 3 minutes.
▶ Insert diaphragm in the mixer unit per installation instructions; replace if defective.
▶ Insert code plug correctly; replace if defective.
▶ Check whether voltage (120 VAC) is present between terminal 1 and terminal 3;
repair if defective.
▶ Check turbine; replace if defective.
▶ Replace fuse Si 3 (24 V) (6.3 A fuse according to IEC default).
Greenstar combi 100 p / 151 p