7
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3.8
Troubleshooting
Installation, servicing and repairs may only be carried out by an approved engineer.
The following table illustrates only a few solutions to straightforward problems.
The operations marked with “*” may only be carried out by an approved technician
Fault
Possible Cause
Solution
Appliance does not ignite.
Batteries flat, incorrectly fitted or switch set to
Off
Check position and refit/replace.
Pilot flame lights slowly/with difficulty
Batteries flat.
Replace.
Red LED flashes
Water not hot enough
Check position of water temperature control and
adjust to obtain desired hot water temperature
Water not hot enough, no flame
Gas supply dynamic pressure too low
Check gas cylinder governor and replace if
incompatible or damaged
Check whether gas cylinder (butane) is freezing
when appliance is in operation and re-site in
warmer location if necessary
Flame goes out while appliance is in
operation
Temperature limiter has tripped
Wait 10 minutes then restart appliance. If
problem recurs, call an approved technician.
Flue gas safety device has tripped
Ventilate room. Wait 10 minutes then restart
appliance. If problem recurs, call an approved
technician.
Reduced water flow rate
Inadequate inlet flow rate
Check and adjust.
Dirt in water service cock or mixer unit
Check and clean.
Automatic water valve clogged
Clean filter.*
Heat exchanger clogged (scale)
Clean and descale as necessary.*
Function check
*
Flue gas safety device function check:
- Disconnect flue pipe
- Replace with pipe (about 50 cm long) with sealed end
- Fit pipe vertically
- Start up appliance at rated output and set temperature
control to maximum temperature.
Under those conditions, the appliance should shut down
after two minutes. Remove temporary pipe and reconnect
flue pipe.
* This work may only be carried out by an approved engineer.
3.7
Converting to a different gas type
Use only the
genuine Bosch conversion kit
. Conversion
may only be carried out by an approved technician.
