Ideal Boilers i-mini 24 Installation And Servicing

Contents

53FAULT FINDINGFAULT FINDING FAULT FINDING FAULT FINDING FAULT FINDING FAULT FINDINGi-mini - Installation and Servicing75 aLTERNaTINg ‘F’ aND ‘5’ - RETURN ThERMIsTOR FaULTRemove the Return Thermistor from the CH ReturnPipe and disconnect the wires.Check the resistance using a suitable multimeterconnected across the thermistor’s terminal pins.At 25 o C expect 9,700 - 10,300 OhmsAt 60 o C expect 2,400 - 2,600 OhmsAt 85 o C expect 1,000 - 1,100 OhmsIs the Thermistor value correct?Is there continuity between the PCB andthe Thermistor?Fit a new ThermistorNOCheck and replacewiring as necessaryYESNO YESReplace PCB76 aLTERNaTINg ‘F’ aND ‘6’ - OUTsIDE sENsOR FaULTDisconnect the wires to the outside sensor.Check the resistance using a suitable multimeterconnected across the Outside Sensor’s terminal pins.At 0 o C expect 31,000 - 35,000 OhmsAt 15 o C expect 15,000 - 16,500 OhmsAt 30 o C expect 7,700 - 8,500 OhmsIs the Outside Sensor value correct?YESIs the wiring securely connected between theincoming terminal block boiler connection of theOutside Sensor and the PCB? Replace PCBFit a new Outside SensorNOSecurely connect the wiring at theTerminal Block and the PCBIs the wiring securely connected at both the boiler andOutside Sensor?YESNO Securely connect the wiring at both theboiler and Outside SensorNOYES77 aLTERNaTINg ‘F’ aND ‘7’ - LOW MaINs VOLTagEContact electricity provider