Service Manual

3Troubleshooting (continued)

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

FAULT

DESCRIPTION

CORRECTIVE ACTION

 

 

 

 

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.

 

 

 

 

Fatal Error

The main control board has detected an

• Restore the default parameters.

Parameters

internal fault.

• Replace the main control board.

• Replace the display board.

 

 

 

 

 

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Lochinvar 151 - 801 service manual Low 24 VAC, Watch Dog Error, Write EEProm, CRC Parameters, No Error Stored, Fatal Error

151 - 801 specifications

Lochinvar 151 - 801 is a high-efficiency commercial water heater designed to meet the demanding needs of various applications in the hospitality, healthcare, and educational sectors. This advanced system provides reliable hot water with enhanced performance while promoting energy conservation and sustainability.

One of the standout features of the Lochinvar 151 - 801 is its powerful heating capability. With a robust heating input of up to 150,000 BTU per hour, it ensures a steady supply of hot water even during peak demand times. The efficient heat exchanger design optimizes thermal performance, allowing for quicker recovery rates, which is essential for facilities requiring substantial hot water usage.

This model integrates cutting-edge technologies to maximize energy efficiency. Utilized in the Lochinvar 151 - 801 is the Smart System control technology, which provides precise temperature management and diagnostics. This feature not only enhances operation efficiency but simplifies service and maintenance by providing real-time data and alerts, leading to reduced downtime.

Additionally, the Lochinvar 151 - 801 employs a stainless-steel tank construction that promotes durability and robustness. The tank is adequately insulated to minimize heat loss, thus keeping energy costs down. Its compact design also allows for easy installation in various spaces, including those with limited footprints.

Moreover, the unit features advanced combustion technology, including a modulating gas valve that adjusts the flame size according to demand, promoting even greater efficiency. This ensures that the water heater operates at optimum performance levels, reducing fuel consumption while ensuring a consistent supply of hot water.

Safety is a primary concern for Lochinvar, and the 151 - 801 model includes several integrated safety features, such as an ignition safety shutoff and a temperature/pressure relief valve. These systems work together to provide peace of mind while ensuring the unit operates safely within its designated parameters.

In conclusion, the Lochinvar 151 - 801 is an exemplary choice for commercial applications, offering powerful performance, efficient technologies, durable construction, and enhanced safety features. With its combination of high output and advanced monitoring capabilities, it stands as a reliable solution for organizations seeking an effective hot water heating solution.