Lochinvar 81-286 service manual Troubleshooting

Page 37

 

 

 

 

Service Manual

3 Troubleshooting (continued)

 

 

 

 

 

 

 

Table 3-4Troubleshooting Chart - Fault Messages Displayed on Boiler Interface

 

 

 

 

 

FAULT

DESCRIPTION

 

CORRECTIVE ACTION

 

 

 

 

 

 

 

 

• Reset the pressure switches.

 

 

 

 

• Measure the supply gas pressure to determine cause

 

 

 

of failure. Natural gas pressures should be between

 

 

 

4 - 14 inches w.c. and LP gas

pressures

 

- Either the optional manual reset low gas

should be between 8 - 14 inches w.c.

 

Gas Pressure SW

pressure switch or the optional manual reset

• Refer to Section 7 - Gas Connections of the Knight

(will require a manual

high gas pressure switch tripped.

Boiler Installation and Operation Manual for detailed

 

 

information concerning the gas supply.

 

reset once the condition

 

 

 

 

 

• Correct the supply gas pressure if necessary.

has been corrected. Press

 

 

the RESET button on the

 

 

• Check for a loose or misplaced jumper if pressure

SMART SYSTEM display

 

 

switches are not installed.

 

to reset.)

 

 

 

 

 

 

 

 

• Check for a loose or misplaced jumper on the Low

 

- The gas pressure switch contacts on the

Voltage Connection Board.

 

 

• Check for the addition of a device wired across the

 

Low Voltage Connection Board are open.

 

gas pressure switch terminals on the Low Voltage

 

 

 

 

 

 

Connection Board.

 

 

 

 

 

 

 

 

• Check boiler pump operation on a call for heat.

Flow Switch/

 

 

• Check for closed valves or obstructions in the boiler

- Either the optional flow switch or the optional

piping.

 

LWCO

• Verify system is full of water and all air has been

(will require a manual

low water cutoff is not making.

purged from the system.

 

 

 

 

reset once condition has

 

 

• Check for loose or misplaced jumpers if flow switch or

been corrected. Press

 

 

 

 

LWCO is not installed.

 

the RESET button on the

 

 

 

 

 

 

 

 

SMART SYSTEM display

 

 

 

 

 

 

 

 

 

 

to reset.)

- Blown fuse.

• Replace fuse F3 on the control board, see page 33

 

of this manual.

 

 

 

 

 

 

 

 

 

Blocked Drain SW

 

 

• Check condensate tube from unit to floor drain for

(will require a manual

 

 

proper installation and obstructions.

 

 

 

• Inspect condensate trap for blockage.

Clean if

reset once condition has

The blocked drain switch has detected

been corrected. Press

excessive condensate build up inside the

necessary.

 

the RESET button on the

• Check for loose wiring connection at wire harness

SMART SYSTEM display

unit.

plug.

 

to reset.)

 

 

• Bad blocked drain switch. Replace switch.

 

 

 

 

 

 

 

37

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Contents Models 81 Contents Handling ceramic fiber materials Please read before proceedingNiosh stated First Aid When servicing boiler Service What is in this manual?Maintenance TroubleshootingNear boiler piping ServiceNavigation Dial Knight boiler displayLOW Voltage Connection Board Control inputsControl outputs Smart Control ModuleGeneral Operation Access modesHow the boiler operates How the control module operatesOperation Display From previous page Sequence of Operation Button Screen Operation Display Status Display panel menu accessButton Screen Status Operation Display Display panel parameter accessParameter table Description See User Access Installer Access Display ModifyMenu DHW Settings Resetoutdoor Description See User Access Installer Access Display ModifyBMS Service Notification Viewable and changeable control parameters Temperature units C / FTime and Date Software VersionData Logging Temperature SettingsFunctions DHW Settings Outdoor Reset Anti-Cycling Control modes Ramp SettingsControlling Sensor BMS Thermostat InputMinimum On/Off Time Cascade OffsetCirculation pumps Service Notification Service technician Maintenance Maintenance and annual startupInstructions Maintenance Check water system Flue vent system and air pipingCheck expansion tank Check boiler relief valveCheck all boiler wiring Check ignition ground wiringCheck control settings Check flame signalReview with owner Cleaning boiler heat exchangerOiled bearing circulators Kit Part Component Number DescriptionBefore troubleshooting TroubleshootingCheck control module fuses Check the followingNo Burner No DisplayOperation Unit DoesTemperature Resistance Temperature Resistance Checking temperature sensorsResistance Temperature No Pump NoisyBoiler Pump System Pump DHW PumpTroubleshooting Open Temp SwApplies to the 286 Model Only Anti-cyclingFlame Sequence Cont’dOutlet Mrhl Outlet ArhlFan Speed Low Fan Low/HighHigh GV/RelaySensor Shorted FaultLouver Proving Inlet SensorFatal Error Flue Sensor FaultMemory Error Flue Temp DiffDelta T High Flue Temp HighOutlet Temp Rem Ctrl Flt Service BlkParameters Progr Combustion Analysis Procedure Gas Valve Adjustment Gas valve adjustment procedureOr Obstruction Gas Supply Pressure
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81-286 specifications

Lochinvar 81-286 is a highly efficient and innovative heating solution that represents the latest advancements in boiler technology. This model, part of Lochinvar's prestigious line-up, is designed for commercial applications, delivering superior performance while emphasizing energy efficiency and user-friendly operation.

One of the standout features of the Lochinvar 81-286 is its robust construction. Built with high-quality materials, the unit is engineered for durability and reliability, ensuring long-term operation with minimal maintenance. Its compact design allows for versatility in installation, making it suitable for various building layouts and configurations.

The boiler's primary technology is its advanced condensing capability, which optimizes heat transfer and reduces energy consumption. By efficiently using the heat generated during combustion, the 81-286 can achieve higher thermal efficiencies, often surpassing traditional systems. This results in lower operating costs and reduced greenhouse gas emissions, aligning with the growing demand for sustainable energy solutions in commercial buildings.

Lochinvar incorporates intelligent control systems into the 81-286, featuring user-friendly interfaces that facilitate straightforward programming and monitoring. These control systems enable precise regulation of temperature and pressure, ensuring optimal operation while providing real-time feedback that aids in troubleshooting and maintenance. Users can enjoy the convenience of remote monitoring, enhancing the overall user experience.

Another key characteristic of the Lochinvar 81-286 is its capacity range. The model is available in various sizes, allowing it to meet the specific demands of different facilities, from small businesses to large industrial applications. This flexibility makes it a top choice for contractors and engineers seeking reliable heating solutions that cater to diverse needs.

In addition, the Lochinvar 81-286 boasts exceptional safety features, including built-in safeguards that protect against overheating and pressure surges. These aspects ensure that the unit operates within safe parameters, providing peace of mind for facility managers and operators.

In summary, the Lochinvar 81-286 combines durability, efficiency, and advanced technology, making it an ideal solution for commercial heating needs. With its innovative condensing design, intelligent controls, and safety features, this boiler stands out as a reliable choice for those seeking sustainable and effective heating solutions. Its versatility and performance make it a key player in today’s ever-evolving energy landscape.
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