Thermo E 200 / 320 5 Troubleshooting and error correction
503
5.3 Malfunction code output via flash
code
The error cause is outputted as a flash code via the
operating display.
After five short signals the long flash signals are
counted.
The number of long flash impulses corresponds to the
respective flash code. Flash codes and their respective
error meaning are presented in Table 502.
Error in the fuel supply
No fuel delivery to the heater. • Fuel tank empty.
• Bent, closed, clogged or
leaking lines.
• Paraffin deposits or frozen water entrapments in fuel
lines or lines.
• Venting opening in tank closed.
• Fuel lines mixed up.
• Fuel filter contaminated.
• Fuel screen (filter) in pump contaminated.
Error in the combustion
CO
2
value cannot be adjusted to nominal value.
Irregular combustion.
• Air bubbles in fuel supply line (leaking fuel supply line).
• Fuel filter contaminated or leaking.
• Fuel integration leaking (suction lift, low pressure in
tank), observe installation instruction.
• Fuel pump defective (pump pressure).
• Screen (filter) in fuel pump contaminated.
• O-ring seal on fuel pump ineffective (leaky or lack of
O-ring).
• Atomizer nozzle defective.
• Combustion air and exhaust lines throttled or closed.
• Burner motor speed too low.
• Coupling defective.
Table 501: General error symptoms
Error symptom Possible cause
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