Lochinvar Troubleshooting Flame Fail Running and Boiler Lockout
Page 27

Service Manual

3Troubleshooting (continued)

Table 3E (continued from previous page) Troubleshooting Chart - Fault Messages Displayed on Water Heater Interface

FAULT

 

DESCRIPTION

 

CORRECTIVE ACTION

 

 

 

 

 

The unit was running and lost the flame

• Inspect spark electrode and associated wiring for

 

signal.

This condition occurred four (4)

damage and connection.

Reference page 19 of this

 

straight times.

manual for removal and cleaning procedures. Replace

 

 

 

if necessary.

 

 

 

 

 

Exception: The 500 Model will lock out after

• Check for proper electrical grounding of unit.

 

 

one (1) try.

 

 

 

 

 

 

 

 

 

 

 

• 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 Armor

 

 

 

Water Heater 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 there are no obstructions.

 

No Flame

 

 

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

 

 

connection on the side of the main control board during

Running

 

 

the ignition attempt. If no voltage is present, replace the

(will require a manual

 

 

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

 

 

 

 

disconnect the wiring from the gas valve and attempt to

SYSTEM display to

 

 

 

 

measure voltage at that point. The main control board

reset.)

 

 

 

 

can detect if the gas valve is not connected and will

 

 

 

 

 

 

display the GV / Relay 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 19 of this manual for removal and

 

 

 

cleaning procedures. Replace if necessary.

 

 

 

 

• Inspect the burner. Reference page 19 of this manual

 

 

 

for removal and cleaning procedures. Replace if

 

 

 

necessary.

 

 

 

 

 

 

 

• Replace the main control board.

 

 

 

 

 

 

 

 

 

 

 

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Contents Models 150 Contents Please read before proceeding Handling ceramic fiber materialsNiosh stated First Aid Troubleshooting What is in this manual?Service MaintenanceArmor water heater display ServiceControl inputs Control outputs Saving parameters General OperationHow the water heater operates Sequence of operationSequence of operation Use this procedure to access menus from the display panel Display panel menu accessButton Operation Display Comments Display panel parameter accessWHR Parameter tableNot used Data logging Viewable and changeable control parametersWHR settings FunctionsNot used Control modes Circulation pumps Service NotificationMaintenance Maintenance and annual startup Service technicianOwner maintenance Maintenance Check water heater relief valve Flue vent system and air pipingCheck water system Check expansion tankPerform start-up and checks Check ignition ground wiringCheck all water heater wiring Check control settingsOiled bearing circulators Check flame signalCleaning water heater heat exchanger Review with ownerCheck the following TroubleshootingBefore troubleshooting Check control module fusesUnit Does Not No DisplayNo Burner OperationTemperature F Resistance Ω Checking temperature sensorsOpening Noisy OperationNo Pump Relief ValveGV/Relay Flow SwitchFlame SequenceNo Flame Ign Running No FlameFan Speed Low Manual ResetHigh Limit Fan LowSensor Shorted Fan HighFan Speed High Sensor OpenRem Ctrl Flt ParametersProgr Low 24 VAC Service BlkWatch Dog Error No Error StoredGas Supply Pressure Combustion Analysis ProcedureGas Valve Adjustment Or ObstructionGas valve adjustment procedure Models 150Model Page

150 - 500 specifications

Lochinvar has established itself as a leader in the field of hydronic heating solutions, and the Lochinvar 150 - 500 series is a prime example of its commitment to innovation and efficiency. Designed primarily for commercial applications, this line of high-efficiency boilers is engineered to provide optimized performance, reliability, and cost-effectiveness.

One of the standout features of the Lochinvar 150 - 500 series is its robust construction. Built with a durable stainless-steel heat exchanger, these boilers offer superior resistance to corrosion, ensuring a longer lifespan and consistent performance over time. The advanced design of the heat exchanger also maximizes heat transfer, contributing to higher efficiency ratings.

In terms of technology, the Lochinvar 150 - 500 series incorporates the Concentric Venting System, which allows for flexible installation options and reduces the overall footprint required for the boiler setup. This system is particularly advantageous in commercial settings where space can be limited. The boilers are equipped with smart controls that provide real-time monitoring and diagnostics, allowing for easier maintenance and reducing downtime.

The series features a comprehensive modulation range, allowing the boilers to adjust their output based on the heating demand. This capability not only enhances efficiency but also lowers energy consumption, making it an eco-friendly choice for businesses seeking to reduce their environmental impact. The Lochinvar 150 - 500 boilers utilize innovative combustion technologies, including an integrated burner that ensures optimal combustion efficiency and reduced emissions.

Safety is a priority with the Lochinvar 150 - 500 series, which includes multiple safety features such as lockout protection, pressure switches, and high-temperature limit controls. These measures ensure that the unit operates safely under varying conditions, providing peace of mind for operators.

Additionally, the compact design of the Lochinvar 150 - 500 series allows for easy transportation and installation. Its lightweight structure enables it to be maneuvered through tight spaces typically found in commercial buildings, making it a versatile option for installers.

In summary, the Lochinvar 150 - 500 series is an excellent choice for anyone seeking a reliable, efficient, and technologically advanced boiler solution. With its durable construction, advanced features, and commitment to safety and efficiency, this series stands out as a trusted option in the competitive market of hydronic heating systems.
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