Lochinvar 151 - 801 service manual No Flame, Running

Page 30

Service Manual

3Troubleshooting

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

FAULT

DESCRIPTION

 

CORRECTIVE ACTION

 

 

 

 

 

The unit was running and lost the flame

• Inspect spark electrode and associated wiring for

 

signal. This condition occurred four (4)

damage and connection.

Reference page 22 of this

 

straight times.

manual for removal and cleaning procedures. Replace

 

 

if necessary.

 

 

 

 

 

Exception: Models 501 - 801 will lock out

• Check for proper electrical grounding of unit.

 

 

after one retry for ignition. It will require a

 

 

manual reset before attempting to fire again.

• Check

incoming

supply

gas pressure. Natural gas

 

 

pressures should be between 4 -

14 inches

w.c. and

 

 

LP gas pressures should be between 8 - 14 inches w.c.

 

 

Refer to Section 7 - Gas Connections of the Armor

 

 

Water Heater Installation and Operation Manual for

 

 

detailed information concerning the gas supply.

 

 

• Verify that the plastic hose from the gas valve to the air

 

 

inlet is connected and is not damaged.

 

 

 

• Verify that the vent/air intake pipes are installed

 

 

correctly and there are no obstructions.

 

No Flame

 

• Check for 24 VAC to the gas valve at the 2-pin

 

connection on the side of the main control board during

Running

 

the ignition attempt. If no voltage is present, replace the

(will require a manual

 

main control board.

 

 

 

 

 

 

 

 

 

 

reset once the condition

 

• If 24 VAC is present at the main control board, check

has been corrected.

 

 

the wiring between the main control board and the gas

Press the RESET button

 

 

valve.

Replace

the wiring if

necessary.

Do not

on the SMART

 

 

disconnect the wiring from the gas valve and attempt to

SYSTEM display to

 

 

measure voltage at that point. The main control board

reset.)

 

 

can detect if the gas valve is not connected and will

 

 

 

 

display the GV / Relay Fail fault.

 

 

 

 

• If 24 VAC is present, check the outlet of the valve to

 

 

ensure the valve is flowing gas. With a manometer

 

 

connected to the outlet tap of the gas valve, when the

 

 

unit is in the prepurge period, there should be a

 

 

negative pressure present. When the valve is

 

 

energized a change in pressure should occur. If the

 

 

pressure change does not occur, the gas valve is not

 

 

opening. Replace the gas valve.

 

 

 

 

• Inspect

flame

sensor

and

associated

wiring.

 

 

Reference page 22 of this manual for removal and

 

 

cleaning procedures. Replace if necessary.

 

 

 

• Inspect the burner. Reference page 22 of this manual

 

 

for removal and cleaning procedures. Replace if

 

 

necessary.

 

 

 

 

 

 

• Replace the main control board.

 

 

 

 

 

 

 

 

 

 

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Contents Models 151 Contents Please read before proceeding Handling ceramic fiber materialsNiosh stated First Aid Maintenance What is in this manual?Service TroubleshootingService Armor water heater displaySmart System Control Board Control inputsSmart System Control Board Control outputsHow the water heater operates Access modesGeneral Operation Sequence of operationOperation Display Display panel menu access Button Screen Operation Display StatusDisplay panel parameter access Parameter table GeneralModes Viewable and changeable control parameters Functions DHW SettingsData Logging Anti-CyclingControl modes Minimum On/Off Time Circulation pumpsService Notification Maintenance Maintenance and annual startup Service technicianOwner maintenance Maintenance Check expansion tank Flue vent system and air pipingCheck water system Check water heater relief valveCheck control settings Check ignition ground wiringCheck all water heater wiring Perform start-up and checksReview with owner Check flame signalCleaning heat exchanger Oiled bearing circulatorsCheck control module fuses TroubleshootingBefore troubleshooting Check the followingOperation No DisplayNo Burner Unit Does NotWire Color R/BK and Y Wire Color G and Y Checking temperature sensorsTemperature F Resistance Ω Resistance TemperatureRelief Valve NoisyNo Pump OpeningFault Description Corrective Action Flow SwitchAnti-cycling Flame Fail IgnNo Flame RunningFlame Sequence Auto ResetManual Reset High LimitGV/Relay Fan LowFan Speed Low FailFlue Temp High Sensor ShortedLouver Proving Delta T HighService Blk Outlet Temp HighRem Ctrl Flt Fatal Error Watch Dog ErrorNo Error Stored Low 24 VACOr Obstruction Combustion Analysis ProcedureGas Valve Adjustment Gas Supply PressureGas valve adjustment procedure Models 151Model 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.
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