Lochinvar Troubleshooting Boiler: Flame Failures, Running Issues, and Lockout Solutions

Page 42

Service Manual

3 Troubleshooting

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

FAULT

DESCRIPTION

 

CORRECTIVE ACTION

 

 

 

 

Flame Out of

 

 

 

Sequence 1

 

• Check supply voltage for proper polarity.

(will require a manual

 

The flame detector 1 circuit is seeing a flame

• Check external wiring for voltage feedback.

reset once the condition

has been corrected.

signal while no flame is present.

• Check the internal wiring for bad connections.

Press the RESET button

 

 

 

 

on the SMART TOUCH

 

 

 

display to reset.)

 

 

 

 

 

 

Flame Out of

 

• Check combustion of burner 1 and adjust valve 1 if

 

 

necessary.

Sequence 2

 

• Check supply voltage for proper polarity.

(will require a manual

 

The flame detector 2 circuit is seeing a flame

• Check external wiring for voltage feedback.

reset once the condition

has been corrected.

signal from burner 1.

• Check the flame rod and make sure it is clean.

Press the RESET button

 

 

Check internal wiring for bad connections.

on the SMART TOUCH

 

 

Remove and inspect the burner.

display to reset.)

 

 

 

 

 

 

• Inspect flame rod 1 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 1

 

 

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.

signal.

 

inlet is connected and is not damaged.

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

Press the RESET button

 

on the SMART TOUCH

 

 

and there are no obstructions.

display 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.

 

 

 

 

42

Image 42
Contents Models 1.5 2.0 2.5 3.0 Contents Please read before proceeding Handling ceramic fiber materialsNiosh stated First Aid When servicing boiler Maintenance What is in this manual?Service TroubleshootingService Boiler pipingHome Screen Smart Control Module Control inputsControl outputs StripHow the boiler operates Access modesGeneral Operation How the control modules operateTo adjust and save parameters reference FIG Sequence of operation Parameter table Sub Parameter Name See Min Max Default User InstallerValue Access MenuDelay Ramp BMS Setup Setback HWG Night Pumps Initial Setup Viewable and changeable control parametersSet Points Outdoor Reset Ramp Delay Advanced Setup SH/HWG Night Setback Cascade Offset ModBusCascade Minimum On/Off TimePumps Service Notification Running Hours Service NotificationService Notification in Months Service Notification CyclesService Cascade Screen 8Cascade ScreenGraph Screen 9Graph ScreenParameter SelectionService History Screen 11History ScreenLockout Faults13History ScreenRuntime History Service Screen 14Service ScreenOwner maintenance Maintenance Maintenance and annual startupService technician See the Crest User’s Information Manual for InstructionsMaintenance Check expansion tank Flue vent system and air pipingCheck water system Check boiler relief valveCheck control settings Check ignition ground wiringCheck all boiler wiring Check flame signalCleaning boiler heat exchanger Review with ownerCheck the following TroubleshootingBefore troubleshooting Check control module fusesTroubleshooting Checking temperature sensors No Pump Low Water Cutoff OpenAnti-cycling Flame FailureIgnition Flame Out Sequence Flame OutRunning Gas Valve / Relay Failure Unit was running and lost the flameHigh Limit Auto ResetManual Reset High Limit OpenFault Description Corrective Action Delta T High Louver Proving Sw OpenFlue Temp High Outlet TempRem Ctrl Flt Service BlkOutlet Temp High Parameters SavedSensor Shorted Switch OpenSensor Open Flue SensorTemperature Burner SupplyDifferential Too Many Resets Try LaterInternal Fault Writing toWrite EEProm Watch Dog ErrorNo Error Stored CRC ParametersOr Obstruction Combustion Analysis ProcedureGas Valve Adjustment Gas Supply PressureGas valve adjustment procedure 2Gas Valve Adjustment Models 1.5Page
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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.

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