Lochinvar 150 - 500 Fan High, Fan Speed High, Sensor Open, Sensor Shorted, Aux. Proving

Page 29

Service Manual

3Troubleshooting (continued)

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

FAULT

DESCRIPTION

CORRECTIVE ACTION

 

 

 

 

The actual fan RPM is 30% higher than what

• Vent/air intake lengths exceed the maximum allowed

 

is being called for.

lengths.

Refer to Section 3 - General Venting of the

Fan High

 

Armor

Water Heater Installation and Operation

 

 

 

 

 

 

 

OR

 

Manual for proper lengths.

 

 

 

 

 

 

 

 

 

 

 

Fan Speed High

 

• 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

 

• Replace the fan.

 

 

 

 

to reset.)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

• Replace the main control board.

 

 

 

Sensor Open

Either the inlet water or outlet water

• Check the sensors and their associated wiring.

(will require a manual

temperature sensor has been disconnected.

Repair or replace the sensor or wiring if damaged.

reset once the condition

 

• Measure the resistance of the sensors and compare

has been corrected. Press

 

 

the resistance to the tables

on page 23 of this

the RESET button on the

 

 

manual.

 

 

 

 

 

SMART SYSTEM display

 

 

 

 

 

 

 

 

 

 

 

 

 

to reset.)

 

• Replace the sensor if necessary.

 

 

 

Sensor Shorted

Either the inlet water or outlet water

• Check the sensors and their associated wiring.

(will require a manual

temperature sensor has been shorted.

Repair or replace the sensor or wiring if damaged.

reset once the condition

 

• Measure the resistance of the sensors and compare

has been corrected. Press

 

 

the resistance to the tables

on page 23 of this

the RESET button on the

 

 

manual.

 

 

 

 

 

SMART SYSTEM display

 

 

 

 

 

 

 

 

 

 

 

 

 

to reset.)

 

• Replace the sensor if necessary.

 

 

 

Aux. Proving

An optional remote proving switch is not

• Check function of remote devices.

(will require a manual

making.

• Check for loose or misplaced jumper if auxiliary

reset once the condition

 

has been corrected. Press

 

proving switch is not installed.

 

 

 

 

the RESET button on the

 

 

 

 

 

 

 

SMART SYSTEM display

 

 

 

 

 

 

 

to reset.)

 

 

 

 

 

 

 

 

 

 

 

 

The flue temperature has exceeded the set

• Inspect the heat exchanger.

Reference page 20 of

 

parameters for the water heater.

this manual for the procedure on how to clean the flue

 

 

side of the heat exchanger.

 

 

 

 

 

 

• Inspect the flue sensor and associated wiring.

 

 

Measure the resistance of the flue sensor and

Temp O/Shoot

 

compare to Table 3C on page 23 of this manual.

 

Replace the sensor if necessary.

 

 

 

 

• Verify that the vent/air intake pipes are properly

 

 

installed and that there are no obstructions.

 

 

• Replace the main control board.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

29

 

 

 

 

 

 

 

 

 

 

 

 

 

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Contents Models 150 Contents Niosh stated First Aid Please read before proceedingHandling ceramic fiber materials Service What is in this manual?Maintenance TroubleshootingArmor water heater display ServiceControl inputs Control outputs How the water heater operates General OperationSequence of operation Saving parametersSequence 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 parametersNot used Control modes WHR settingsFunctions Circulation pumps Service NotificationOwner maintenance Maintenance Maintenance and annual startupService technician Maintenance Check water system Flue vent system and air pipingCheck expansion tank Check water heater relief valveCheck all water heater wiring Check ignition ground wiringCheck control settings Perform start-up and checksCleaning water heater heat exchanger Check flame signalReview with owner Oiled bearing circulatorsBefore troubleshooting TroubleshootingCheck control module fuses Check the followingNo Burner No DisplayOperation Unit Does NotTemperature F Resistance Ω Checking temperature sensorsNo Pump Noisy OperationRelief Valve OpeningFlame Flow SwitchSequence GV/RelayNo Flame Ign Running No FlameHigh Limit Manual ResetFan Low Fan Speed LowFan Speed High Fan HighSensor Open Sensor ShortedProgr Rem Ctrl FltParameters Watch Dog Error Service BlkNo Error Stored Low 24 VACGas Valve Adjustment Combustion Analysis ProcedureOr Obstruction Gas Supply PressureModel Gas valve adjustment procedureModels 150 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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