Service Manual

3Troubleshooting (continued)

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

FAULT

DESCRIPTION

CORRECTIVE ACTION

 

 

 

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

 

 

has been corrected. Press

 

• Measure the resistance of the sensors and compare

the RESET button on the

 

the resistance to the tables on page 26 of this

SMART SYSTEM display

 

manual.

to reset.)

 

• Replace the sensor if necessary.

 

 

 

 

 

Louver 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 stack temperature has exceeded the set

• Inspect the heat exchanger. Reference page 23 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

 

 

compare to Table 3D on page 26 of this manual.

Flue Temp High

 

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.

 

 

 

 

Scaling has reduced water flow.

• Deliming may be required.

 

 

 

 

 

• 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

 

 

water heater.

 

 

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

Delta T High

The temperature rise across the heat

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

exchanger has exceeded the set parameters

wiring back to the main control board. Replace the

 

 

for the water heater.

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 pump is the proper size. Reference

 

 

Section 6 - System Piping of the Armor Water Heater

 

 

Installation and Operation Manual for water heater

 

 

pump specifications.

 

 

 

33

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Lochinvar 151 - 801 service manual Sensor Shorted, Louver Proving, Flue Temp High, Delta T High
Page 32 Page 34

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.
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