VITODENS 200 WB2A - Heatingspares247.com

8 Fault FindingDiagnosis and correction. See the following table of error messages:Error System Cause of fault ActionMessage Behaviour30 Boiler cools down Boiler temperature sensor Check boiler temperature sensorshorted out38 Boiler cools down Boiler temperature sensor Check boiler temperature sensoropen circuitb0 Boiler cools down Flue gas temperature Check flue gas temperature sensorsensor shorted outb8 Boiler cools down Flue gas temperature Check flue gas temperature sensorsensor open circuitb7 Boiler will not run Boiler coding card missing or Check boiler coding cardincorrect card fittedE4 Boiler will not run Supply voltage fault Replace control unitE5 Boiler will not run Flame detection fault Check ionisation electrode. Checkflue gas system for leaks. PRESSE6 Burner fault Flue gas/air supply blocked Check flue gas/air supply Check airpressure switch & cables PRESSF0 Burner will not run Internal fault Replace controls unitF1 Burner will not run Flue gas temperature limiter Check heating system water level.has locked outVent heating system PRESS after20 minutesF2 Burner will not run Flow temperature limiter Check heating system water level.has respondedCheck circulation. Check limitthermostat and leads. PRESSF3 Burner will not start False flame signal Check ionisation electrodes andleads. PRESSF4 Burner will not run No flame signal Check ionisation electrode, gaspressure, gas valve, ignitiontransformer/electrode andcondensate drain. PRESSF7 Burner locked out Differential pressure sensor faulty Check differential pressure sensorF8 Burner will not run Gas valve closes too late Check gas valve. PRESSF9 Burner will not run Fan speed too low at burner start Check fan, fan cables, supply andfan control PRESSA Burner will not run Fan does not stop Check fan, fan cables and fancontrol. PRESSFd Burner at lockout Burner control unit fault Check ignition electrodes/leads. Checkfor EMC interference. PRESSIf fault persists replace control unitFE Burner at lockout Strong EMC interference, Remove EMC, Check coding card orfaulty boiler coding cardreplace control unitor main PCB faulty.FF Burner at lockout Internal fault Remove EMC, Check coding card orreplace control unit52