HAMWORTHY HEATING LTD32FLEET V series 500001213/GErrorcodeInternal Error-CodePotential cause Actions0 No entry in code10 Fault outside sensor20 142 Short Circuit Boiler Flow Sensor Check temp sensor in water flow pipe & replace if nec-essary143 Open Circuit Boiler Flow Sensor Check connections to temp sensor in water flow pipeCheck temp sensor in water flow connection & replaceif necessary28 Fault flue gas sensor32 Fault flow temperature sensor 240 144 Short Circuit Boiler Rtn Sensor Check temp sensor in water rtn pipe & replace if neces-saryOpen Circuit Boiler Rtn Sensor Check connections to temp sensor in water rtn pipeCheck temp sensor in water rtn connection & replace ifnecessary50 Fault DHW temperature sensor 152 Fault DHW temperature sensor 261 Fault room unit 1 Check room device62 Wrong room unit 1 or wrong radio clock con-nectedConnect compatible room control unit77 Fault air pressure sensor78 Fault water pressure sensor81 518 LPB Short Circuit or no power supply Check connections to clip in (switch off and isolateboiler before working on mains wiring)82 Address collision on LPB... Check addresses of connected modules91 Data overflow in EEPROM92 Hardware fault in electronics95 Invalid time of day Set correct time100 2 clock time masters105 Maintenance message P629 to reset : change from 0 to 1110/111 Limit thermostat has cut out Allow the boiler to cool and reset thermostatInvestigate cause of overheating (see section 9.3)113 Flue gas supervision equipment has cut out117 Water pressure too high118 Water pressure too low119 Water pressure switch has cut out Check water pressure128 Loss of flame during operation Check connections to flame probeInvestigate flame probe conditionCheck combustion when boiler is firing130 Flue gas limit temperature exceeded132 Safety shutdown Check gas pressureCheck flue & condensate trap for blockagesCheck safety switches133 No flame on completion of safety time Check operation of gas valve. Check spark igniter134 Loss of flame during operation140 Inadmissible LPB segment number/device N°148 Incompatibility LPB... interface / basic unit151 552 Relay clip in faulty Check connections to clip inCheck and replace clip in module(switch off and isolate boiler before working on mainswiring)152 Fault in connection with LMU settings153 LMU has locked out Press reset button(code appears if reset button is pressed when there areno faults)154 Flow Problems Check water flow through the boiler & Check the pumps160 Fan speed threshold not reached Check obstructions in fan, burner & flue.Check non-return valve operatesCheck heat exchanger for debris161 Maximum fan speed exceeded Check parameters162 Fault air pressure switch (does not close)164 Fault heating circuit flow switch / pressureswitch166 Fault air pressure switch (does not open)180 Chimney sweep function active181 Controller stop function active183 LMU... in parameter setting modeFigure 8.2.10 LMU Error Codes