Lochinvar 50-210 service manual No Flame, Running

Page 34

Service Manual

3Troubleshooting

Table 3F (continued from previous page) Troubleshooting Chart - Fault Messages Displayed on Boiler Interface

FAULT

 

DESCRIPTION

 

CORRECTIVE ACTION

 

 

 

 

 

The unit was running and lost the flame

• Inspect spark electrode and associated wiring for

 

signal.

This condition occurred four (4)

damage and connection.

Reference page 26 of this

 

straight times.

manual for removal and cleaning procedures. Replace

 

 

 

if necessary.

 

 

 

 

 

 

 

• Check for proper electrical grounding of unit.

 

 

 

 

• Check incoming supply gas pressure. Natural gas

 

 

 

pressures should be between 4 -

14 inches

w.c. and

 

 

 

LP gas pressures should be between 8 - 14 inches w.c.

 

 

 

Refer to Section 7 - Gas Connections of the Knight

 

 

 

Boiler Installation and Operation Manual for detailed

 

 

 

information concerning the gas supply.

 

 

 

 

• Verify that the plastic hose from the gas valve to the air

 

 

 

inlet is connected and is not damaged.

 

 

 

 

• Verify that the vent/air intake pipes are installed

 

 

 

correctly and there are no obstructions.

 

 

 

 

• Check for 24 vac to the gas valve at the 2-pin

No Flame

 

 

connection on the side of the main control board during

 

 

the ignition attempt. If no voltage is present, replace the

Running

 

 

main control board.

 

 

 

(will require a manual

 

 

• If 24 vac is present at the main control board, check the

reset once the condition

 

 

has been corrected.

 

 

wiring between the main control board and the gas

Press the RESET button

 

 

valve.

Replace

the wiring if

necessary.

Do not

on the SMART

 

 

disconnect the wiring from the gas valve and attempt to

SYSTEM display to

 

 

measure voltage at that point. The main control board

 

 

can detect if the gas valve is not connected and will

reset.)

 

 

 

 

display the Gas Valve or Gas Valve Fail fault.

 

 

 

 

 

 

 

 

• If 24 vac is present, check the outlet of the valve to

 

 

 

ensure the valve is flowing gas. With a manometer

 

 

 

connected to the outlet tap of the gas valve, when the

 

 

 

unit is in the prepurge period, there should be a

 

 

 

negative pressure present. When the valve is

 

 

 

energized a change in pressure should occur. If the

 

 

 

pressure change does not occur, the gas valve is not

 

 

 

opening. Replace the gas valve.

 

 

 

 

 

• Inspect

flame

sensor

and

associated

wiring.

 

 

 

Reference page 26 of this manual for removal and

 

 

 

cleaning procedures. Replace if necessary.

 

 

 

 

• Inspect the burner. Reference page 26 of this manual

 

 

 

for removal and cleaning procedures. Replace if

 

 

 

necessary.

 

 

 

 

 

 

 

• Replace the main control board.

 

 

 

 

 

 

 

 

 

 

 

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Contents Models 50 Contents Handling ceramic fiber materials Please read before proceedingNiosh stated First Aid When servicing boiler Maintenance What is in this manual?Service TroubleshootingService Near boiler pipingKnight wall mount display Smart Control Module Control inputsControl outputs How the control module operates General OperationHow the boiler operates Sequence of operationSequence of operation OUT 123.8F129BLR SH 41% Rate Display panel menu access Display panel parameter access Temperature Data Parameter tableControl Circulation Service Temperature settings Viewable and changeable control parametersData logging DHW settingsOutdoor air reset FunctionsMinimum SH set point Shift reset curveMaximum SH set point Outdoor air shutdownAnti-cycling SH source Control modesSH controlling sensor Boiler cascade addressCascade offset Service NotificationCirculation pumps Service technician Maintenance Maintenance and annual startupOwner maintenance Maintenance Check expansion tank Flue vent system and air pipingCheck water system Check boiler relief valveCheck control settings Check ignition ground wiringCheck all boiler wiring Inspect ignition and flame sense electrodesReview with owner Check flame signalCleaning boiler heat exchanger Oiled bearing circulatorsCheck control module fuses TroubleshootingBefore troubleshooting Check the followingOperation No DisplayNo Burner Unit Does NotChecking temperature sensors Temperature ResistanceBoiler Pump System Pump NoisyNo Pump DHW PumpFlame Switch/LWCOFlow SequenceAnti-cycling No Flame IgnNo Flame RunningFan Low Auto ResetHigh Limit Fan Speed LowSensor Open Fan HighFan Speed High Sensor ShortedTemp O/Shoot Parameters Progr Rem Ctrl FltOpen No Error Stored Service BlkWatch Dog Error Low 24 vacOr Obstruction Combustion Analysis ProcedureGas Valve Adjustment Gas Supply PressureGas valve adjustment procedure 2Gas Valve AdjustmentPage

50-210 specifications

The Lochinvar 50-210 is a powerful and efficient boiler designed for residential and commercial heating applications. This model is a part of Lochinvar’s line of advanced heating solutions, known for their reliability, efficiency, and innovative technologies. The 50-210 offers a high thermal efficiency rating, ensuring that energy consumption is minimized while still providing excellent heating performance.

One of the standout features of the Lochinvar 50-210 boiler is its advanced control system. It is equipped with a user-friendly LCD display that allows easy access to system settings and real-time performance data. This technology enhances user experience, allowing for easy adjustments and monitoring, ensuring optimal performance based on specific heating needs.

The Lochinvar 50-210 is designed with a fully modulating burner, which means it can adjust its output to match the heating demand effectively. This feature not only provides superior comfort but also increases energy savings by preventing the boiler from running at full capacity when it's not necessary. Moreover, the modulating burner minimizes wear and tear, extending the lifespan of the unit.

In terms of safety, the Lochinvar 50-210 incorporates several features such as multiple temperature and pressure sensors, flame safeguard systems, and safety cut-off controls. These safeguard mechanisms ensure that the system operates safely and efficiently, providing peace of mind to users.

The construction of the Lochinvar 50-210 is robust, featuring high-grade stainless steel and a durable heat exchanger. This design helps resist corrosion, ensuring longevity and requiring minimal maintenance over the years. Additionally, its compact design allows for easier installation, making it suitable for various settings, even those with limited space.

Furthermore, the Lochinvar 50-210 operates quietly, which adds to its appeal for residential installations. Its environmental considerations are also noteworthy, with low emissions contributing to cleaner air quality.

Overall, the Lochinvar 50-210 is a sophisticated heating solution that blends efficiency, reliability, and advanced technology. With its user-friendly controls, modulating burner, safety features, and durable construction, it meets the heating demands of modern homes and commercial spaces, making it a top choice for those seeking dependable boiler performance.
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