Warnings; Instructions - Winterwarm Qwikshift QSG Installation Manual

9.3. Warnings

The table below describes the temporary warnings that
can occur. The heater may still be working, or stops until
the cause has been resolved.
Display Error type
A-02 Configuration
error
A-07 Overheating
A-08 Overheating

9.4. Instructions

After identifying the problem, use the Case number to find
the possible cause in this paragraph.
Case 1: Flame lasts only 5 seconds after ignition.
• The flame is not detected:
– Check the ignition/ionisation cable and the
electrode. The cable should have a resistance
of 1 kΩ.
• The air heater is not earthed properly.
• The circuit board is defective.
Case 2: No flame after ignition.
• There is not enough gas pressure.
• The gas mixture is too poor:
– Adjust the gas valve (see §8.1.).
• The gas valve does not open:
– During ignition, check for a 230 V voltage on
the valve.
• Check if the ignition electrode sparks. If not:
– Check the cable and electrode and replace
them when damaged.
– Check the burner control unit and replace it
when it does not give a spark output.
Case 3: Heat exchange sensor or flue sensor is overheated.
• Check if the connectors J12 and J6 are plugged in
correctly and if the connection J12[1-4] (optional
overheating protection) is closed.
• Check if the system fan supplies enough air.
• Check the settings of the gas valve. The heater may
be overfired. If so:
– Adjust the burner pressure.
Case 4: Heat exchange sensor or flue sensor not detected,
or short circuit.
NOTICE L-25 refers to the heat exchange sensor. L-26
22
Description Case #
Heater configuration error 19
Heat exchange sensor is 3
almost overheated
Flue sensor is almost 3
overheated
refers to the flue sensor, if applicable.
• The heat exchange sensor consists of two internal
sensors. The readings of these sensors may differ
too much:
– Measure the resistance of each sensor. The
resistance should be 20 KΩ at 25 °C and 25
KΩ at 20 °C.
– If the measured values differ too much,
replace the sensor.
Case 5: Too many flame failures while burning.
• The gas supply is not constant. This results in a
drop in gas supply pressure while burning and
causes the flame to extinguish.
– Check the gas supply pressure while the
heater is burning.
• The burner pressure for Low fire is too low. This
causes the flame to extinguish because it is too
small to be detected.
– Check the burner pressure at Low fire and
adjust if necessary (see §8.1).
• Recirculation of flue gas. Due to a problem with the
flue terminal the flue gas is sucked back into the air
inlet. This results into a lack of oxygen and causes
the flame to stop.
– Check the flue system and fresh air supply.
Only certified, original parts should be used.
Case 6: Burner fan does not work.
• Check if the burner fan is blocked.
• Check if the wiring is damaged.
• The burner fan is defective.
Case 7: Burner fan rotates at the wrong speed.
• Check if the burner fan runs smoothly.
• Check if the wiring is damaged.
Case 9: Too many reset actions in a short timespan.
• This error will disappear after some time or if the
main power is disconnected for a while.
Case 11: Insufficient air passage through the heat
exchanger. Pressure switch does not close.
• Check if the combustion fan is running.
• Check if the flue system is blocked or restricted.
• Check the pressure switch and the connections.
• Check the heat exchanger for flue leakage.
Case 12: E-error for more than 24 hours.
• Switch the air heater off and on and check the error
code.