Lochinvar 50-210 service manual Anti-cycling, No Flame Ign

Page 33

Service Manual

3Troubleshooting (continued)

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

FAULT

DESCRIPTION

 

CORRECTIVE ACTION

 

 

 

 

 

The main control board has received a call

• The control board will release the call for heat after a

Anti-cycling

for heat too quickly after the previous call for

set time period.

 

 

 

heat has ended.

 

 

 

 

 

 

• The control board will release the call for heat if the

 

 

 

 

outlet temperature drops too quickly.

 

 

 

 

 

The unit has failed to prove main burner

• Inspect spark electrode and associated wiring for

 

ignition after four (4) attempts.

damage and connection. Reference page 26 of this

 

 

manual for removal and cleaning procedures.

 

 

Replace if necessary.

 

 

 

 

 

• Check for proper electrical grounding of the 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

 

 

Wall Mount 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 that there are no obstructions.

 

 

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

No Flame Ign

 

connection on the side of the main control board during

 

the ignition attempt.

If no voltage is present, replace

(will require a manual

 

the main control board.

 

 

reset once the condition

 

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

has been corrected.

 

 

the wiring between the main control board and the gas

Press the RESET button

 

 

valve.

Replace the

wiring if

necessary. Do

not

on the SMART SYSTEM

 

 

disconnect the wiring from the gas valve and attempt to

display to reset.)

 

 

measure voltage at that point. The main control board

 

 

 

 

can detect if the gas valve is not connected and will

 

 

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 Please read before proceeding Handling ceramic fiber materialsNiosh stated First Aid When servicing boiler Service What is in this manual?Maintenance TroubleshootingNear boiler piping ServiceKnight wall mount display Control inputs Smart Control ModuleControl outputs How the boiler operates General OperationHow the control module operates Sequence of operationOUT 123.8F129 Sequence of operationBLR SH 41% Rate Display panel menu access Display panel parameter access Parameter table Temperature DataControl Circulation Service Viewable and changeable control parameters Temperature settingsOutdoor air reset DHW settingsData logging FunctionsMaximum SH set point Shift reset curveMinimum SH set point Outdoor air shutdownAnti-cycling SH controlling sensor Control modesSH source Boiler cascade addressService Notification Cascade offsetCirculation pumps Maintenance Maintenance and annual startup Service technicianOwner maintenance 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 Inspect ignition and flame sense electrodesCleaning boiler heat exchanger Check flame signalReview with owner Oiled bearing circulatorsBefore troubleshooting TroubleshootingCheck control module fuses Check the followingNo Burner No DisplayOperation Unit Does NotTemperature Resistance Checking temperature sensorsNo Pump NoisyBoiler Pump System Pump DHW PumpFlow Switch/LWCOFlame SequenceNo Flame Ign Anti-cyclingRunning No FlameHigh Limit Auto ResetFan Low Fan Speed LowFan Speed High Fan HighSensor Open Sensor ShortedTemp O/Shoot Rem Ctrl Flt Parameters ProgrOpen Watch Dog Error Service BlkNo Error Stored Low 24 vacGas Valve Adjustment Combustion Analysis ProcedureOr Obstruction Gas Supply Pressure2Gas Valve Adjustment Gas valve adjustment procedurePage

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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