L.B. White Premier TS350 Owner's Manual And Instructions

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L.B. White Premier TS350 Owner's Manual And Instructions Manual pdf 22 page image

READ THIS ENTIRE SECTION BEFORE BEGINNINGTO TROUBLESHOOT PROBLEMS.The following troubleshooting guide provides systematicprocedures for isolating equipment problems. This guide isintended for use by a QUALIFIED GAS HEATER SERVICEPERSON. DO NNOT AATTEMPT TTO SSERVICE TTHESE HHEATERSUNLESS YYOU HHAVE BBEEN PPROPERLY TTRAINED.TEST EEQUIPMENT RREQUIREDThe following pieces of test equipment will be required totroubleshoot this system with minimal time and effort.• Digital MMultimeter - for measuring AC voltage andresistance.• Low PPressure GGauge - for checking inlet and outletpressures at the gas control valve against dataplaterating.■ Visually inspect equipment for apparent damage.■ Check all wiring for loose connections and worninsulation.Refer to the system operation sequence in this section togain an understanding as to how the equipment operatesduring a call for heat.Understanding the sequence of operation of the ignitionmodule and related components is esential as it will relatedirectly to problem solving provided by the flow charts.The ignition control module is self-diagnostic. The red light,located within the selector switch, will flash a specific lightpattern depending upon the problem which is diagnosed.To effectively use the flow charts, you must first identifywhat the problem is by the light pattern of the L.E.D. (lightemitting diode) diagnostic light. If the light is flashing, theflash pattern will be followed by a pause and then a repeatof the flash pattern until the problem is corrected. Refer tothe tables below to identify what page to refer to whentroubleshooting any problems.The L.E.D. light will only be on when the selector switch ispositioned to HEAT and the thermostat is set above roomtemperature. The light will not be on when the selectorswitch is positioned to VENT.Heating MMode PProblems PageL.E.D. is steady on. No flash pattern. . . . . . . . . . . . . . . . . . . 22L.E.D. light is not on. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Heating MMode PProblems ((Cont.) PageL.E.D. diagnostic light is flashing:A. One Time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23B. Two Times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24C. Three Times . . . . . . . . . . . . . . . . . . . . . . . . . . . 25D. Four Times . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25E. Five Times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25Ventilation MMode PProblems PageA. Motor Does Not Run . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26B. Motor “Hums,” Does Not Run . . . . . . . . . . . . . . . . . . . . . . 26Components should be replaced only after each step has beencompleted and replacement is suggested in the flow chart.Refer to the Servicing sections as necessary to obtaininformation on disassembly and replacement procedures ofthe component once the problem is identified by the flow chart.DDIIRREECCTT IIGGNNIITTIIOONN OOPPEERRAATTIIOONN SSEEQQUUEENNCCEE::-- Selector switch is set to heat.-- Line voltage is sent to ignition control and to transformer.-- Red light. on selector switch is illuminated.-- Transformer reduces line voltage to 24 volts which is sent tothermostat.-- The thermostat calls for heat.-- The thermostat sends 24 volts to ignition control.-- Ignition control module performs self safety check.-- Internal components are tested.-- Air proving circuit is checked.-- Ignition control module begins ignition trial sequence.-- Ignition control module sends 24 volts to air proving switch.-- Ignition control sends line voltage to motor relay-- Motor relay closes and fan motor starts.-- Air proving switch closes and 24 volts are returned to theignition control module.-- Ignition control module sends high voltage to the igniter .electrode.-- Igniter sparks.-- Ignition control module sends 24 volts to the gas controlvalve through the high limit switches.-- Gas control valve opens.-- Ignition occurs.-- Igniter continues to spark until flame provingoccurs.-- Ignition spark is cut off.-- Gas valve stays open.-- Gas control modulates based upon thermostat.-- Room warms to desired temperature.-- Thermostat is satisfied.-- Gas control closes, burner shuts down.-- FFaann mmoottoorr ccoonnttiinnuueess ttoo rruunn ffoorr 11 mmiinnuuttee ,, ccoooolliinnggtthhee hheeaatt cchhaammbbeerr..-- Fan motor stops.-- Heater shuts off.-- Process starts again on a call for heat.IIGGNNIITTIIOONN FFAAIILLUURREE SSEEQQUUEENNCCEE::-- Trial for ignition takes approximately 10 seconds.-- If ignition module does not sense a flame within the ignitiontrial, the module goes into safety lockout (3 flash pattern.)-- Gas valve closes.-- Ignition spark shuts off.-- Fan motor stops.-- To retry for ignition, the systems must be reset:-- Turn the thermostat down and then up to call forheat or unplug heater and plug it back in or-- Position selector switch to off and then back to on21Troubleshooting InformationWARNING■ This heater can start at any time.■ Troubleshooting this system may require operating theunit with line voltage present and gas on. Use extremecaution when working on the heater.■ Failure to follow this warning may result in propertydamage, personal injury or death.