14
8.2 Other faults are listed in Table 2.
Table 2
Number of
LED
blinks
Fault
Notes/ Troubleshooting
1
Temperature difference between
the readings of the overheating
sensor and heat sensor is too
big.
Heat/ overheating sensor indicates temperature higher 102 °C.
Thoroughly check the complete liquid circuit and circulation pump
operation.
Difference between temperature measured by the heat sensor and
overheating sensor is more than 20 °C (i.e. reading of the overheating
sensor or heat sensor is above 70 °C). Check the overheating sensor or
heat sensor and replace with a new one, if necessary.
Check circulation pump for correct operation.
2
No more tries to start the pre-
heater left
In case there is no more tries to start the pre-heater left, check fuel
supply and amount of fuel supplied. Check the air supply system to the
combustion and exhaust gas-escape channel.
3
Interruption of combustion
Check fuel supply and amount of fuel supplied. Check the air supply
system to the combustion and exhaust gas-escape channel. If the pre-
heater starts, check the combustion detector and replace, if necessary.
Check the fine fuel filter for clogging up.
4
Air pump motor malfunction
Check the glow plug, replace if necessary.
Check the electric wiring of the air pump motor; replace the air pump, if
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