Navien CH-180 Service Manual

Also see for CH-180: Owner's operation manual User's operation manual Installation manual Operation manual Installation manual

Contents

Navien CH-180 Service Manual Manual pdf 76 page image

74Error conditions and Symptoms Analysis5.9. 08ErrorCheck methodError DescriptionCheck the hot water temperature sensor. If a problem (short-circuit: 248ı orhigher) is detected for 3 seconds, the system displays the error message 06E onthe indoor thermostat.08EHot WateroutletthermistorshortCheckitems1. Check if the hot water temperature sensor connector is wet due to any reason,including leakage.2. Replace the defective hot water temperature sensor.3. Replace the PCB.Fault PossibleCauses Check methodCheck if the hot water temperature sensor connector or the PCBharness terminal is wet due to any reason, including leakage.Check the current heating temperature on the display.SensorerrorDefectivetemperaturesensorconnectorTemperturesensorDefectivePCBOthertroubleIf the trouble continues despite the checking of above items,replace the PCB.Measure the temperature sensor resistance, if the value is 0Ω,replace the temperature sensorIs the Supply thermistornormal ?YesNoCheck connectorReplace Supply thermistorResistance between two white wires of CN 13 is from0.8 to 20k ohm at normal condition.Caution : Before measuring resistance of the thermistor,remove the connector from the PCB.©Navien America Inc. 2010 CH series service Manual Version 1.0