Lochinvar 151 - 801 Fan Low, Fan Speed Low, GV/Relay, Fail, Fan High, Fan Speed High, Sensor Open

Page 32

Service Manual

3Troubleshooting

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

FAULT

DESCRIPTION

CORRECTIVE ACTION

 

 

 

 

 

• Vent/air intake lengths exceed the maximum allowed

 

The actual fan RPM is 30% lower than what

lengths. Refer to Section 3 - General Venting of the

Fan Low

is being called for.

Armor Water Heater Installation and Operation Manual

 

 

for proper lengths.

OR

 

 

• Check for obstruction or blockage in the vent/air

Fan Speed Low

 

 

intake pipes or at terminations.

(will require a manual

 

 

 

reset once the condition

 

• Check the wiring connections at the fan and at the

has been corrected. Press

 

main control board.

the RESET button on the

 

• Replace the fan.

SMART SYSTEM display

 

• Replace the main control board.

to reset.)

 

 

 

 

 

 

 

 

• Replace fuse F4 on the control board, see page 24 of

 

Blown fuse.

this manual.

 

 

 

GV/Relay

The main control board did not detect the

• Check wiring harness connection at the gas valve and

Fail

gas valve.

at the main control board.

 

 

 

(will require a manual

 

• Replace the gas valve wire harness.

reset once the condition

 

 

 

has been corrected. Press

 

• Replace the gas valve.

the RESET button on the

 

• Replace the main control board.

SMART SYSTEM display

 

to reset.)

 

 

 

 

 

 

 

• Vent/air intake lengths exceed the maximum allowed

Fan High

 

lengths. Refer to Section 3 - General Venting of the

 

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

The actual fan RPM is 30% higher than what

 

has been corrected. Press

is being called for.

• Check the wiring connections at the fan and at the

the RESET button on the

 

 

main control board.

SMART SYSTEM display

 

 

 

to reset.)

 

• Replace the fan.

 

 

• 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 26 of this

the RESET button on the

 

 

manual.

SMART SYSTEM display

 

 

 

to reset.)

 

• Replace the sensor if necessary.

 

 

 

32

Image 32
Contents Models 151 Contents Niosh stated First Aid Please read before proceedingHandling ceramic fiber materials What is in this manual? ServiceMaintenance TroubleshootingService Armor water heater displaySmart System Control Board Control inputsSmart System Control Board Control outputsAccess modes General OperationHow the water heater operates Sequence of operationOperation Display Display panel menu access Button Screen Operation Display StatusDisplay panel parameter access Parameter table GeneralModes Viewable and changeable control parameters DHW Settings Data LoggingFunctions Anti-CyclingControl modes Minimum On/Off Time Circulation pumpsService Notification Owner maintenance Maintenance Maintenance and annual startupService technician Maintenance Flue vent system and air piping Check water systemCheck expansion tank Check water heater relief valveCheck ignition ground wiring Check all water heater wiringCheck control settings Perform start-up and checksCheck flame signal Cleaning heat exchangerReview with owner Oiled bearing circulatorsTroubleshooting Before troubleshootingCheck control module fuses Check the followingNo Display No BurnerOperation Unit Does NotChecking temperature sensors Temperature F Resistance ΩWire Color R/BK and Y Wire Color G and Y Resistance TemperatureNoisy No PumpRelief Valve OpeningFault Description Corrective Action Flow SwitchAnti-cycling Flame Fail IgnNo Flame RunningAuto Reset Manual ResetFlame Sequence High LimitFan Low Fan Speed LowGV/Relay FailSensor Shorted Louver ProvingFlue Temp High Delta T HighRem Ctrl Flt Service BlkOutlet Temp High Watch Dog Error No Error StoredFatal Error Low 24 VACCombustion Analysis Procedure Gas Valve AdjustmentOr Obstruction Gas Supply PressureModel Gas valve adjustment procedureModels 151 4Gas Valve Adjustment Model Models 601

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.