Flow, Switch/LWCO, Flame, Sequence, GV/Relay

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
Flow		piping.
Switch/LWCO		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		• Check for loose or misplaced jumpers if flow switch or
the RESET button on		LWCO is not installed.
the SMART SYSTEM		LWCO is not installed.
the SMART SYSTEM
display to reset.)
display to reset.)	Blown fuse.	• Replace fuse F2 on the control board, see page 28 of
	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		• Inspect condensate trap for blockage. Clean if
reset once condition has		necessary.
been corrected. Press		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.
		• 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.
Sequence		• Check external wiring for voltage feedback.
(will require a manual		• 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		• Check the internal wiring for bad connections.
on the SMART SYSTEM		• Replace main control board.
display to reset.)		• 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.
		at the main control board.

(will require a manual		• Replace the gas valve wire harness.
reset once the condition		• Replace the gas valve wire harness.
reset once the condition
has been corrected.		• Replace the gas valve.
Press the RESET button		• Replace the gas valve.
Press the RESET button
on the SMART SYSTEM		• Replace the main control board.
display to reset.)		• Replace the main control board.
display to reset.)

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.

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

Models: 50-210

3Troubleshooting

FAULT

DESCRIPTION

CORRECTIVE ACTION

Flow

Switch/LWCO

purged from the system.

Blocked Drain SW

Flame

Sequence

GV/Relay

Fail

50-210 specifications