Troubleshooting - Riello TAU 55 UNIT Installation And Maintenance Manual

FAULT
The burner performs pre-ven-
tilation and ignition correctly
but shuts down after about 5
attempts
The burner shuts down during
pre-ventilation
The burner shuts down after pre-
ventilation because the flame
fails to ignite
The burner does not start when
it receives the
control signal
CAUSE
Flame not detected
No gas supply
Flue blocked
Flame detection error
The flame is already lit
Air intake obstructed
Gas valve feeds too little gas
Gas valve faulty
Weak or no ignition arc
Air in gas line
No electrical power
No gas supply
Electrical short circuit

TROUBLESHOOTING

SOLUTION
- Call Technical Assistance
- Make sure gas shut-off cock is
open
- Check flue
- Call Technical Assistance
- Call Technical Assistance
- Check for blockage
- Check gas supply pressure
- Call Technical Assistance
- Call Technical Assistance
- Bleed the gas feed circuit
- Check voltage at gas valve ter-
minals
- Check the condition of the
fuses
- Make sure gas shut-off cock is
open
- Call Technical Assistance
TECHNICAL ASSISTANCE SERVICE
69