Lochinvar Boiler Troubleshooting: Flow Switch Problems, Fault Codes, and Lockout Resets
Page 47

Service Manual

3 Troubleshooting (continued)

Table 3F Troubleshooting Chart - Fault Messages Displayed on Boiler Interface

FAULT

DESCRIPTION

CORRECTIVE ACTION

 

 

 

 

 

 

 

 

 

 

• Check boiler pump operation on a call for heat.

 

Flow Switch/

 

• Check for closed valves or obstructions in the boiler

 

LWCO

Either the low water cutoff or the optional

piping.

 

• Verify system is full of water and all air has been

 

(will require a manual

flow switch is not making.

 

reset once condition has

 

purged from the system.

 

been corrected. Press

 

• Check for loose or misplaced jumpers if flow switch is

 

the RESET button on

 

not installed.

 

the display to reset.)

 

 

 

 

 

 

 

Blown fuse.

• Replace fuse F2 on the control board, see page 43 of

 

 

this manual.

 

 

 

 

Condensate

 

• Check condensate tube from unit to floor drain for

 

 

proper installation and obstructions.

 

Drain Blocked

 

 

The blocked drain switch has detected

• Inspect condensate trap for blockage. Clean if

 

(will require a manual

 

reset once condition has

excessive condensate build up inside the

necessary.

 

been corrected. Press

unit.

• Check for loose wiring connection at wire harness

 

the RESET button on

 

plug.

 

the display to reset.)

 

• Bad blocked drain switch. Replace switch.

 

 

 

 

 

 

 

 

 

 

 

Flame out of

 

• Check supply voltage for proper polarity.

 

Sequence

 

• Check external wiring for voltage feedback.

 

(will require a manual

The flame detector circuit is seeing a flame

 

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

 

reset once the condition

signal while no flame is present.

 

has been corrected.

 

• Check the internal wiring for bad connections.

 

Press the RESET button

 

• Replace main control board.

 

on the display to reset.)

 

 

 

 

 

 

 

 

 

Gas Valve /

 

• Check wiring harness connection at the gas valve and

 

Connection

 

 

 

at the main control board.

 

(will require a manual

The main control board did not detect the

 

• Replace the gas valve wire harness.

 

reset once the condition

gas valve.

 

• Replace the gas valve.

 

has been corrected.

 

 

Press the RESET button

 

• Replace the main control board.

 

on the display to reset.)

 

 

 

 

 

 

 

 

 

 

• Inspect spark electrode and associated wiring for

 

 

 

damage and connection. Reference page 39 of this

 

 

 

manual for removal and cleaning procedures.

 

 

 

Replace if necessary.

 

 

 

• Check for proper electrical grounding of the unit.

 

 

 

• Check incoming supply gas pressure. Natural gas

 

Burner Did Not

 

pressures should be between 4 - 14 inches w.c.

 

 

(1.0 - 3.5 kPa) and LP gas pressures should be

 

Light

 

between 8 - 14 inches w.c. (2.0 - 3.2 kPa). Refer

 

(will require a manual

The unit has failed to prove main burner

to Section 6 - Gas Connections of the SYNC

 

reset once the condition

ignition after one attempt. It will require a

Installation and Operation Manual for detailed

 

has been corrected.

manual reset before attempting to fire again.

information concerning the gas supply.

 

Press the RESET button

 

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

 

on the display to reset.)

 

air inlet is connected and is not damaged.

 

 

 

• Verify that the vent/air intake pipes are correctly

 

 

 

installed and that there are no obstructions.

 

 

 

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

 

 

 

connection on the side of the main control board

 

 

 

during the ignition attempt. If no voltage is present,

 

 

 

replace the main control board.

 

 

 

 

 

47

 

 

 

 

 

 

 

 

 

 

 

 

Page 46 Page 48
Image 47
Page 46 Page 48
Contents Models 1.0, 1.3, Contents Niosh stated First Aid Handling ceramic fiber materialsTroubleshooting ServiceMaintenance Near boiler piping ServiceSync display Board Control inputsControl outputs Secondary Smart Touch Control Module PrimarySequence of operation General OperationHow the boiler operates How the control module operatesSequence of operation space heating and HW Sequence of operationParameter table This table lists the parameters and where to access themOutdoor Reset Status Screen Viewable and changeable control parametersService Details Screen Service Main Screen Setup Screen Service/Setup Parameters Screen Service Set Point Parameters Screen Outdoor Reset Parameters Screen Service Night Setback Parameters Screen Cascade Operation Cascade Parameters ScreenPumps Parameters Screen 10Vdc Operation 10Vdc BMS Parameters ScreenService Cascade Screen Service Temps Screen Burners Screen Graph Select Screen History Screen Service Mode Screen Maintenance Maintenance and annual startup Inspect boiler interior Address reported problemsClean condensate trap Inspect boiler areaCheck expansion tank Check boiler relief valve Flue vent system and air pipingCheck water system Inspect ignition and flame sense electrodes Check ignition ground wiringCheck all boiler wiring Check control settingsReview with owner Check flame signalCleaning boiler heat exchanger Test low water flow conditions Test procedureAlarm Screen TroubleshootingCheck control module fuses Before troubleshootingCheck the following Unit Does No DisplayNo Burner OperationTemperature Resistance Checking temperature sensorsSystem Pump NoisyNo Pump Operation Boiler PumpFlame out Flow SwitchCondensate Drain BlockedWhile Running Light cont’dFlame Lost Troubleshooting Blower RPM’s Automatic ResetHigh Limit / HEX Temp SWSensor Shorted Louver Proving SwitchToo High Sensor OpenFlap Valve Resets Try LaterAir Flow Too LowMemos Internal FaultNo Error Stored Writing toGas Supply Pressure Combustion Analysis ProcedureGas Valve Adjustment Or ObstructionModels 1.3 Gas valve adjustment procedureModel
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1.3, 1 specifications

Lochinvar 1 is a remarkable achievement in the realm of modern technology and engineering. As a powerful and efficient water heater, it has been designed to cater to a wide range of residential and commercial needs. One of the standout features of Lochinvar 1 is its advanced heating technology, which incorporates a high-efficiency condensing design. This technology allows the unit to achieve impressive energy savings by maximizing heat transfer while minimizing energy consumption.

The Lochinvar 1 utilizes a stainless steel heat exchanger that enhances durability and corrosion resistance. This not only extends the lifespan of the unit but also ensures consistent performance over time. Coupled with a user-friendly control system, users can easily adjust settings and monitor performance, enhancing overall convenience and usability.

Another key characteristic of the Lochinvar 1 is its compact design, making it suitable for a variety of installation environments. Whether in a residential basement or a commercial utility room, the unit’s space-saving configuration allows for efficient use of available area without compromising on capability.

Safety features are integral to the Lochinvar 1, providing peace of mind for users. The unit is equipped with advanced monitoring systems that can detect irregularities and automatically shut down the system if necessary. This not only protects the equipment but also enhances the safety of the environment in which it operates.

In terms of performance, Lochinvar 1 boasts a high recovery rate, ensuring hot water is available on demand. This is particularly beneficial for settings with high water usage, allowing simultaneous operations without lag.

Moreover, the unit supports various venting options, offering flexibility during installation. Whether using traditional vertical venting or innovations like direct venting, Lochinvar 1 accommodates different building designs and local codes, making it highly versatile.

In conclusion, Lochinvar 1 epitomizes the melding of efficiency, reliability, and user-friendly technology. With its high-performance features, robust safety systems, and adaptable installation options, it stands out as a forefront player in the water heating industry, meeting the diverse needs of today's consumers and businesses alike.
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