Lochinvar 150 - 500 Service Blk, Low 24 VAC, Watch Dog Error, Write EEProm, CRC Parameters

Page 31

Service Manual

3Troubleshooting (continued)

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

FAULT

DESCRIPTION

CORRECTIVE ACTION

 

 

 

 

While the unit is in Service Mode, the outlet

• Establish a heating load to remove the heat from the

 

temperature has exceeded 185°F.

water heater loop.

 

 

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

 

 

has been properly purged from the system.

 

 

• Verify that the water heater is piped properly into the

 

 

heating system. Refer to Section 6 - System Piping

 

 

of the Armor Water Heater Installation and Operation

 

 

Manual for the proper piping methods for the Armor

Service Blk

 

water heater.

 

 

• Check 120 VAC to the water heater pump motor on a

 

 

call for heat. If voltage is not present, check the wiring

 

 

back to the main control board. Replace the main

 

 

control board if necessary.

 

 

• If 120 VAC is present on a call for heat and the water

 

 

heater pump is not operating, replace the pump.

 

 

• Verify that the water heater pump is set to the proper

 

 

speed or that the water heater pump is the proper

 

 

size. Reference Section 6 - System Piping of the

 

 

Armor Water Heater Installation and Operation

 

 

Manual for water heater pump specifications.

 

 

 

 

120 VAC input to the main control board has

• Check 120 VAC supply to the transformer.

 

dropped below 80 VAC.

 

Low 24 VAC

 

• Check wiring connections at the low voltage terminal

 

strip.

 

 

• Check the wire size/length to remote devices.

 

 

• Replace the transformer.

Watch Dog Error

The main control board has detected an

• Replace the main control board.

internal fault.

 

 

 

 

Write EEProm

The main control board has detected an

• Replace the main control board.

internal fault.

 

 

 

 

 

The main control board has detected an

• Replace the main control board.

CRC Parameters

internal fault.

 

 

 

 

 

The main control board has detected an

• Replace the main control board.

No Error Stored

internal fault.

 

 

 

 

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Contents Models 150 Contents Handling ceramic fiber materials Please read before proceedingNiosh 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 parametersFunctions WHR settingsNot used Control modes Circulation pumps Service NotificationService technician Maintenance Maintenance and annual startupOwner 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 OpenParameters Rem Ctrl FltProgr Low 24 VAC Service BlkWatch Dog Error No Error StoredGas Supply Pressure Combustion Analysis ProcedureGas Valve Adjustment Or ObstructionModels 150 Gas valve adjustment procedureModel 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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