Lochinvar 50-210 service manual Auto Reset, High Limit, Fan Low, Fan Speed Low

Page 35

Service Manual

3Troubleshooting (continued)

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

FAULT

DESCRIPTION

CORRECTIVE ACTION

 

 

 

 

The outlet water temperature has exceeded

• Verify that the system is full of water and that all air

 

the fixed setting of the automatic reset high

has been properly purged from the system.

 

limit or the setting of an optional manual

• Verify that the boiler is piped properly into the heating

 

reset high limit.

system. Refer to Section 6 - Hydronic Piping of the

 

 

 

 

Knight Wall Mount Installation and Operation Manual

 

 

for the proper piping methods for the Knight wall

 

 

mount.

 

 

• Check 120 vac to boiler pump motor on a call for

 

 

heat. If voltage is not present, check wiring back to

 

 

the main control board.

 

 

• Replace the main control board if necessary.

Auto Reset

 

• If 120 vac is present on a call for heat and the boiler

 

pump is not operating, replace the pump.

High Limit

 

 

• If the system pump is a variable speed pump, ensure

 

 

 

 

that the system flow is not less than the boiler flow.

 

 

• If operating on something other than an outlet sensor,

 

 

check temperature setting of the main control board.

 

 

• If the optional manual reset high limit has tripped,

 

 

check setting of the device.

 

 

• Check resistance of water sensors and compare to

 

 

Table 3B on page 30 of this manual. Replace sensor

 

 

if necessary.

 

 

• Replace high limit.

 

 

 

 

The actual fan RPM is 30% lower than what

• Vent/air intake lengths exceed the maximum allowed

 

is being called for.

lengths. Refer to Section 3 - General Venting of the

 

 

Fan Low

 

Knight Wall Mount Installation and Operation Manual

 

for proper lengths.

OR

 

 

 

Fan Speed Low

 

• Check for obstruction or blockage in the vent/air

(will require a manual

 

 

intake pipes or at terminations.

reset once the condition

 

 

 

has been corrected. Press

 

• Check the wiring connections at the fan and at the

the RESET button on the

 

 

main control board.

SMART SYSTEM display

 

 

 

to reset.)

 

• Replace the fan.

 

 

 

 

• Replace the main control board.

 

 

 

 

Blown fuse.

• Replace fuse F4 on the control board, see page 28 of

 

 

this manual.

 

 

 

35

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Contents Models 50 Contents Niosh stated First Aid Please read before proceedingHandling ceramic fiber materials When servicing boiler Troubleshooting What is in this manual?Service MaintenanceNear boiler piping ServiceKnight wall mount display Control inputs Smart Control ModuleControl outputs Sequence of operation General OperationHow the boiler operates How the control module operatesOUT 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 settingsFunctions DHW settingsOutdoor air reset Data loggingOutdoor air shutdown Shift reset curveMaximum SH set point Minimum SH set pointAnti-cycling Boiler cascade address Control modesSH controlling sensor SH sourceCirculation pumps Service NotificationCascade offset Owner maintenance Maintenance Maintenance and annual startupService technician Maintenance Check boiler relief valve Flue vent system and air pipingCheck water system Check expansion tankInspect ignition and flame sense electrodes Check ignition ground wiringCheck all boiler wiring Check control settingsOiled bearing circulators Check flame signalCleaning boiler heat exchanger Review with ownerCheck the following TroubleshootingBefore troubleshooting Check control module fusesUnit Does Not No DisplayNo Burner OperationTemperature Resistance Checking temperature sensorsDHW Pump NoisyNo Pump Boiler Pump System PumpSequence Switch/LWCOFlow FlameNo Flame Ign Anti-cyclingRunning No FlameFan Speed Low Auto ResetHigh Limit Fan LowSensor Shorted Fan HighFan Speed High Sensor OpenTemp O/Shoot Open Rem Ctrl FltParameters Progr Low 24 vac Service BlkWatch Dog Error No Error StoredGas Supply Pressure Combustion Analysis ProcedureGas Valve Adjustment Or Obstruction2Gas 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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