Lochinvar Comprehensive Troubleshooting for Flame Failure in Boilers

Page 43

Service Manual

3 Troubleshooting (continued)

Table 3G (continued from previous page) Troubleshooting Chart - Fault Messages Displayed on Boiler Interface

FAULT

DESCRIPTION

CORRECTIVE ACTION

 

 

 

 

 

• Inspect flame rod 2 and associated wiring for damage

 

 

and connection. Reference page 34 of this manual for

 

 

removal and cleaning procedures. Replace if

 

 

necessary.

 

 

• Check for proper electrical grounding of unit.

 

 

• Check incoming supply gas pressure. Natural and

 

 

L.P. gas pressures should be between 4 - 14 inches w.c.

Flame Failure

 

(1.0 - 3.5 kPa). Refer to Section 6 - Gas Connections of

 

the Crest Installation and Operation Manual for detailed

Running 2

 

 

information concerning the gas supply.

(will require a manual

 

The unit was running and lost the flame

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

reset once the condition

has been corrected. Press

signal.

inlet is connected and is not damaged.

the RESET button on the

 

• Verify that the vent/air intake pipes are installed correctly

SMART TOUCH display

 

and there are no obstructions.

to reset.)

 

• Inspect flame sensor and associated wiring. Reference

 

 

 

 

page 34 of this manual for removal and cleaning

 

 

procedures. Replace if necessary.

 

 

• Check combustion.

 

 

• Inspect the burner. Reference page 34 of this manual for

 

 

removal and cleaning procedures. Replace if

 

 

necessary.

 

 

 

Gas Valve / Relay

 

 

Failure 1

 

• Check wiring harness connection at the gas valve and

(will require a manual

The main control board did not detect gas

at the main control board.

reset once the condition

• Replace the gas valve wire harness.

has been corrected. Press

valve 1.

• Replace the gas valve.

the RESET button on the

 

SMART TOUCH display

 

 

to reset.)

 

 

 

 

 

Gas Valve / Relay

 

 

Failure 2

 

• Check wiring harness connection at the gas valve and

(will require a manual

The main control board did not detect gas

at the main control board.

reset once the condition

• Replace the gas valve wire harness.

has been corrected. Press

valve 2.

• Replace the gas valve.

the RESET button on the

 

SMART TOUCH display

 

 

to reset.)

 

 

 

 

 

43

Image 43
Contents Models 1.5 2.0 2.5 3.0 Contents Handling ceramic fiber materials Please read before proceedingNiosh stated First Aid When servicing boiler Troubleshooting What is in this manual?Service MaintenanceBoiler piping ServiceHome Screen Control inputs Smart Control ModuleStrip Control outputsHow the control modules operate Access modesGeneral Operation How the boiler operatesTo adjust and save parameters reference FIG Sequence of operation Menu Sub Parameter Name See Min Max Default User InstallerValue Access Parameter tableDelay Ramp BMS Setup Setback HWG Night Pumps Viewable and changeable control parameters Initial SetupSet Points Outdoor Reset Ramp Delay Advanced Setup SH/HWG Night Setback Minimum On/Off Time ModBusCascade Cascade OffsetPumps Service Notification Cycles Service NotificationService Notification in Months Service Notification Running Hours8Cascade Screen Service Cascade Screen9Graph ScreenParameter Selection Graph Screen11History ScreenLockout Faults Service History Screen13History ScreenRuntime History 14Service Screen Service ScreenSee the Crest User’s Information Manual for Instructions Maintenance Maintenance and annual startupService technician Owner maintenanceMaintenance Check boiler relief valve Flue vent system and air pipingCheck water system Check expansion tankCheck flame signal Check ignition ground wiringCheck all boiler wiring Check control settingsReview with owner Cleaning boiler heat exchangerCheck control module fuses TroubleshootingBefore troubleshooting Check the followingTroubleshooting Checking temperature sensors No Pump Cutoff Open Low WaterFlame Failure Anti-cyclingIgnition Flame Out Flame Out SequenceRunning Unit was running and lost the flame Gas Valve / Relay FailureHigh Limit Open Auto ResetManual Reset High LimitFault Description Corrective Action Outlet Temp Louver Proving Sw OpenFlue Temp High Delta T HighParameters Saved Service BlkOutlet Temp High Rem Ctrl FltFlue Sensor Switch OpenSensor Open Sensor ShortedBurner Supply TemperatureDifferential Writing to Resets Try LaterInternal Fault Too ManyCRC Parameters Watch Dog ErrorNo Error Stored Write EEPromGas Supply Pressure Combustion Analysis ProcedureGas Valve Adjustment Or Obstruction2Gas Valve Adjustment Models 1.5 Gas valve adjustment procedurePage
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3, 2, 3.5, 2.5, 1.5 specifications

Lochinvar is a leader in manufacturing high-efficiency water heating solutions, and their Lochinvar 1.5, 1.3, and 1.0 models exemplify the company's commitment to innovation and performance. These advanced heating systems are designed to meet the diverse needs of commercial and residential applications, providing reliable hot water while ensuring energy efficiency and environmental sustainability.

The Lochinvar 1.5, 1.3, and 1.0 models incorporate cutting-edge technologies that set them apart from traditional water heaters. One of the most notable features is their use of high-efficiency condensing technology, which extracts maximum heat from the combustion process. This process allows the units to achieve high thermal efficiencies, often exceeding 95%, which not only reduces energy costs but also lowers greenhouse gas emissions.

In terms of design, Lochinvar's models are constructed with durable materials, ensuring longevity and reliability in demanding environments. The stainless steel heat exchanger is a key element that contributes to the durability and performance of the units. This material is resistant to corrosion and scale build-up, enhancing the lifespan of the heater and reducing maintenance requirements.

The Lochinvar 1.5, 1.3, and 1.0 models feature advanced control systems that provide precise temperature management and easy operation. The intuitive digital display allows users to monitor performance metrics, temperature settings, and energy consumption with ease. Additionally, these units are equipped with intelligent modulating gas valves that optimize fuel usage based on demand, ensuring efficient operation across various load conditions.

Safety is a priority in the design of Lochinvar's water heaters. The models come with built-in safety features, including flame failure detection, overheat protection, and venting safeguards. These systems work together to ensure the safe operation of the units, giving users peace of mind.

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In summary, Lochinvar's 1.5, 1.3, and 1.0 water heating models represent the pinnacle of efficiency, safety, and reliability. With their advanced technologies, durable construction, and user-friendly features, these units are an excellent choice for anyone seeking a high-performance water heating solution.