Lochinvar 50-210 No Display, No Burner, Operation, Unit Does Not, Modulate, Above 50%

Page 29

Service Manual

3Troubleshooting (continued)

Table 3A Troubleshooting Chart - No Display

FAULT

CAUSE

 

 

CORRECTIVE ACTION

 

 

 

 

 

 

 

 

 

- No 120 vac supplied to unit.

•

Check external line switch, fuse, or breaker.

 

 

 

 

•

Check position of ON/OFF switch. Turn switch to the

 

 

 

ON position.

 

 

 

 

 

 

 

 

 

• Check 120 vac through the ON/OFF switch.

 

 

 

 

• Check

wiring

harness

connection

between display

 

 

 

board

and

main

control

board.

Connect

 

 

 

harness at both points.

 

 

 

 

 

 

No Display

 

 

 

 

 

 

 

 

 

 

 

- No voltage through the switch.

•

Replace switch.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

- Bad display board.

•

Replace board.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

- Bad main control board.

•

Replace the main control board.

 

 

 

 

 

 

 

 

 

 

- Blown fuse.

•

Replace fuse F3 on the main control board, see

 

 

 

page 28 of this manual.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

- Main control board temperature set point

•

Review temperature setting.

 

 

 

 

 

 

satisfied.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

- Remote thermostat satisfied.

•

Review remote thermostat setting.

 

 

 

 

No Burner

 

 

 

 

 

 

 

 

 

 

 

- Outside air temperature above Warm

• Check location of outside air sensor. Check

Operation

Weather Shutdown (WWSD) set point for

 

resistance of outdoor air sensor and compare to Table

 

 

 

main control board.

 

3D on page 30 of this manual.

 

 

 

 

 

 

 

 

 

 

 

 

- Unit locked out on fault.

•

Consult display for specific fault.

Refer

to fault

 

 

 

descriptions on page 32 of this manual for corrective

 

 

 

actions.

 

 

 

 

 

 

 

 

 

 

 

 

- Ramp delay active.

•

Check ramp delay parameter settings. Optional PC

 

 

 

software required.

 

 

 

 

 

 

 

 

 

 

 

 

 

•

Turn ramp delay feature off.

See page 20 of this

 

 

 

manual for instructions on how to turn this feature off.

Unit Does Not

 

 

- Boiler controlled by BMS.

• Check BMS parameter settings. Optional PC

 

 

 

 

 

 

 

 

 

 

Modulate

 

 

software required.

 

 

 

 

 

 

Above 50%

 

 

 

 

 

 

 

 

 

 

 

- Flue sensor open.

•

Verify that the flue sensor is located in the flue outlet.

 

 

 

 

 

 

 

 

 

•

Check wiring connections at the flue sensor.

 

 

 

 

 

 

 

 

•

Check the resistance of the flue sensor and compare

 

 

 

to Table 3C on page 30 of this manual.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

29

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Page 28 Page 30
Image 29
Page 28 Page 30
Contents Models 50 Contents Niosh stated First Aid Please read before proceedingHandling ceramic fiber materials 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 addressCirculation pumps Service NotificationCascade offset Owner maintenance Maintenance Maintenance and annual startupService technician 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 Open Rem Ctrl FltParameters Progr 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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