Lochinvar 50-210 service manual Flow, Switch/LWCO, Flame, Sequence, GV/Relay, Fail

Page 32

Service Manual

3Troubleshooting

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

FAULT

DESCRIPTION

CORRECTIVE ACTION

 

 

 

 

Either the optional flow switch or the optional

• Check boiler pump operation on a call for heat.

 

low water cutoff is not making.

 

Flow

 

• Check for closed valves or obstructions in the boiler

 

piping.

Switch/LWCO

 

 

 

(will require a manual

 

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

reset once condition has

 

purged from the system.

been corrected. Press

 

• Check for loose or misplaced jumpers if flow switch or

the RESET button on

 

 

LWCO is not installed.

the SMART SYSTEM

 

 

 

display to reset.)

 

 

Blown fuse.

• Replace fuse F2 on the control board, see page 28 of

 

 

 

this manual.

 

 

 

 

The blocked drain switch has detected

• Check condensate tube from unit to floor drain for

Blocked Drain SW

excessive condensate build up inside the

proper installation and obstructions.

(will require a manual

unit.

• Inspect condensate trap for blockage. Clean if

reset once condition has

 

 

necessary.

been corrected. Press

 

 

 

the RESET button on

 

• Check for loose wiring connection at wire harness

the SMART SYSTEM

 

plug.

display to reset.)

 

• Bad blocked drain switch. Replace switch.

 

 

 

 

 

Flame

The flame detector circuit is seeing a flame

• Check supply voltage for proper polarity.

Sequence

signal while no flame is present.

 

 

• Check external wiring for voltage feedback.

(will require a manual

 

 

 

reset once the condition

 

• Check the flame rod and make sure it is clean.

has been corrected.

 

• Check the internal wiring for bad connections.

Press the RESET button

 

on the SMART SYSTEM

 

• Replace main control board.

display to reset.)

 

 

 

 

 

 

GV/Relay

The main control board did not detect the gas

• Check wiring harness connection at the gas valve and

Fail

valve.

at the main control board.

 

 

 

(will require a manual

 

• Replace the gas valve wire harness.

reset once the condition

 

 

 

has been corrected.

 

• Replace the gas valve.

Press the RESET button

 

 

 

on the SMART SYSTEM

 

• Replace the main control board.

display to reset.)

 

 

 

 

 

 

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Contents Models 50 Contents Niosh stated First Aid Please read before proceedingHandling ceramic fiber materials When servicing boiler What is in this manual? ServiceMaintenance TroubleshootingService Near boiler pipingKnight wall mount display Smart Control Module Control inputsControl outputs General Operation How the boiler operatesHow the control module 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 parametersDHW settings Outdoor air resetData logging FunctionsShift reset curve Maximum SH set pointMinimum SH set point Outdoor air shutdownAnti-cycling Control modes SH controlling sensorSH source Boiler cascade addressCirculation pumps Service NotificationCascade offset Owner maintenance Maintenance Maintenance and annual startupService technician Maintenance Flue vent system and air piping Check water systemCheck expansion tank Check boiler relief valveCheck ignition ground wiring Check all boiler wiringCheck control settings Inspect ignition and flame sense electrodesCheck flame signal Cleaning boiler heat exchangerReview with owner Oiled bearing circulatorsTroubleshooting Before troubleshootingCheck control module fuses Check the followingNo Display No BurnerOperation Unit Does NotChecking temperature sensors Temperature ResistanceNoisy No PumpBoiler Pump System Pump DHW PumpSwitch/LWCO FlowFlame SequenceAnti-cycling No Flame IgnNo Flame RunningAuto Reset High LimitFan Low Fan Speed LowFan High Fan Speed HighSensor Open Sensor ShortedTemp O/Shoot Open Rem Ctrl FltParameters Progr Service Blk Watch Dog ErrorNo Error Stored Low 24 vacCombustion Analysis Procedure Gas Valve AdjustmentOr Obstruction 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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