VITOTRONIC 100, HC1 VITOCONTROL-S, WB2B Installation and ...

Troubleshooting – Vitotronic 100, HC1Faults displayed at the programming unit (continued)FaultcodeSystem characteristics *1 Cause RemedyBurner in a fault mode No flame signal is present. Check ionization electrode andf4cable, measure the ionizationcurrent, check the gas pressure,check the gas valve, ignition,ignition module, ignition electrodesand condensate drain. Press “ERESET”.The gas valve closes too late. Check gas valve and both controlf8wiring and connections. Press “ERESET”.Fan speed too low at burner start. Check fan, fan supply cables, fanf9power supply and control. Press “ERESET”.Fan not at standstill. Check the fan, the fan connectingfacables and fan control. Press “ERESET”.fcGas valve faulty or faultymodulation valve control; or ventsystem blocked.Check the gas valve. check the ventsystem. Press “E RESET”.Burner blocked Burner control unit fault. Check ignition electrodes andfdconnecting cables. Check the boilercoding card. Check whether astrong interference (EMC) fieldexists near the equipment; press“E RESET”. Replace control unit ifthe fault persists.Burner blocked or in a fault mode Strong interference (EMC) field Restart the equipment. Replace thefenearby, or faulty main PCB.control unit if the equipment will notffNo faultcodedisplayedStrong interference (EMC) fieldnearby, or internal fault.restart.Boiler/burner in standstill Flow switch open Check pump operation and flowswitch.*1 Control mode: Boiler/burner fully operational (fault code must be verified and reset).Burner in fault mode: Boiler control requires manual reset before burner can resume operation.Burner blocked: If fault cause is corrected, burner resumes operation.5414 553 v1.450