Manuals / Lochinvar / Household Appliance / Water Heater

Lochinvar 150 - 500 service manual AW-SERRev E 1/09

Models: 150 - 500

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Revision Notes: Revision B (AW-SER-Rev B) reflects the addition of the Dungs information to the manual.

Revision C (ECO #C02407) reflects the addition of the air pressure switch, FIG. 3-1, removal of pocket pc references and changes made to the Circulation Pump section (page 15).

Revision D (ECO #C02545) reflects the addition of references to periodic cleaning of screens in vent terminations and safety shutoff testing and instructions.

Revision E (ECO #C02738) reflects the addition of the Gas Valve Adjustment Procedure for a 399 model on page 33.

AW-SER Rev E

1/09

Page 36

Image 36

Lochinvar 150 - 500 service manual AW-SERRev E 1/09

Contents

Models Starting Serial #H07H10046464AW-SERRev E Save this manual for future referenceHazard definitions DANGERContents When servicing water heater Please read before proceedingHandling ceramic fiber materials Water heater operationWhat is in this manual? ServiceMaintenance Troubleshooting1Service The Armor water heater displaySMART SYSTEM CONTROL BOARD Control inputs1Service Control outputs CONNECTIONSMART SYSTEM CONTROL BOARD BOARDGeneral Operation 1ServiceInstaller How the water heater operatesOPERATION DISPLAYSequence of operation Display panel menu access 1ServicePress 1 time to toggle menu listing Press 2 times to toggle menu listingDisplay panel parameter access BUTTONOPERATION DISPLAYParameter table 1ServiceViewable and changeable control parameters Show last 10 errorsA General B Not used C Data logging1Service E WHR settingsReset last 10 errors Service mode delayJ Service Notification Service notification in monthsService notification running hours Service notification cycles2Maintenance Maintenance and annual startup Service technicianOwner maintenance see the following pages for instructions2Maintenance continued Address reported problemsClean condensate trap Inspect water heater area2Maintenance Flue vent system and air pipingCheck water system Check expansion tankCheck ignition ground wiring Check all water heater wiringCheck control settings Perform start-upand checksCheck flame signal Cleaning water heater heat exchangerReview with owner Oiled bearing circulators3Troubleshooting Before troubleshootingCheck control module fuses Check the followingFAULT CAUSECORRECTIVE ACTION 3Troubleshooting3Troubleshooting continued Checking temperature sensorsTemperature F Resistance Ω3Troubleshooting FAULTTable 3D Troubleshooting Chart - Noisy System CAUSEDESCRIPTION 3Troubleshooting continuedFAULT Flow Switch3Troubleshooting FAULTDESCRIPTION CORRECTIVE ACTION3Troubleshooting continued FAULTDESCRIPTION CORRECTIVE ACTION3Troubleshooting FAULTManual Reset DESCRIPTION3Troubleshooting continued FAULTDESCRIPTION CORRECTIVE ACTION3Troubleshooting FAULTDESCRIPTION CORRECTIVE ACTION3Troubleshooting continued FAULTService Blk Watch Dog ErrorCombustion Analysis Procedure POSSIBLE CAUSE3Troubleshooting Gas Valve AdjustmentGas valve adjustment procedure 3Troubleshooting continuedFigure 3-3 Gas Valve Adjustment Model Figure 3-2 Gas Valve Adjustment ModelsPage Page AW-SERRev E 1/09