Lochinvar 402 - 2072, 502 - 2072 service manual No Flame Ign, HSI Current Low, Flame CKT, Error

Page 36

Copper-fin II/IIE Boiler, Water Heater and Pool Service Manual

3 Troubleshooting

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

FAULT

DESCRIPTION

CORRECTIVE ACTION

 

 

 

 

 

The unit has failed to prove burner flame

• Inspect igniter and associated wiring for damage and

 

upon ignition.

connection.

Reference page 25 of this manual for

 

 

removal and cleaning procedure.

Replace

if

 

 

necessary.

 

 

 

 

 

• Check for proper electrical grounding of unit.

 

 

 

• Check incoming supply gas pressure. Refer to the

 

 

Gas Connections Section in the Installation and

 

 

Operation Manual for detailed information concerning

 

 

the gas supply.

 

 

 

 

• Verify that the tube from the gas valve to the combustion

 

 

air chamber is connected and is not damaged.

 

No Flame Ign

 

• Verify that the vent/air intake pipes are correctly

(Will require a manual

 

installed and that there are no obstructions.

 

reset. Press the RESET

 

 

 

 

 

button on the SMART

 

• Inspect the

burners. Reference pages

26 and

27

SYSTEM display to reset.)

 

of this manual for removal and cleaning procedures.

 

 

Replace if necessary.

 

 

 

 

• Refer to the Checking Manifold Gas Pressure and

 

 

Combustion Analysis Procedure on pages 27 and 28

 

 

of this manual for the proper settings.

 

 

 

 

• Check for 24 VAC to the gas valve during the ignition

 

 

attempt. If no voltage is present, check the wiring

 

 

between the gas valve and the main control board.

 

 

 

• Replace the wiring or the main control board as

 

 

necessary.

 

 

 

HSI Current Low

Amp draw of the hot surface igniter did not

• Measure the amp draw of the hot surface igniter during

(Will require a manual

meet the minimum requirement of 2.6 amps.

the trial for ignition stage. If less than 2.6 amps

reset once the condition

 

replace the hot surface igniter.

has been corrected. Press

 

• If more than 2.6 amps replace the control module.

the RESET button on the

 

SMART SYSTEM display

 

 

to reset.)

 

 

 

 

 

Flame CKT

The main control board has detected an

• Replace the main control board.

internal fault.

 

Error

 

 

 

36

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Contents Copper-fin II/IIE Boiler, Water Heater Pool Heater Contents Please read before proceeding Handling ceramic fiber materialsNiosh stated First Aid What is in this manual? ServiceMaintenance TroubleshootingService Copper-fin displayControl inputs Control outputs General Operation How the appliance operatesHow the control module operates Sequence of operationSequence of operation OUT 123.8F129HTR Postpurge Display panel menu access Display panel parameter access Functions Settingsdhw Resetoutdoor Parameter tableAnti-cycle Delay Yes Temperature settings boiler only Viewable and changeable control parametersData logging FunctionsDHW settings Outdoor air reset boiler only Anti-cycling Control modes Building Management System BMS CascadeService Notification Circulation pumpsMaintenance Maintenance and annual startup Service technicianOwner maintenance See the User’s Information Manual for instructionsMaintenance Check relief valve Inspect/replace hot surface igniter Inspect/replace hot surface ignitersCheck all wiring Check control settingsInspect and clean burner Perform start-up and checksAccess to the burner will require the following steps Checking combustion air pressureAdjusting combustion air pressure Checking manifold gas pressureValve Fitting Control Knob Inspect and clean the heat exchanger Review with ownerOiled bearing circulators Troubleshooting Before troubleshootingCheck control module fuses Check the followingNo Display No BurnerOperation Unit Does NotChecking temperature sensors Resistance TemperatureTemperature Resistance Noisy No PumpBoiler Pump System Pump DHW PumpFlow Switch Flame SequenceAnti-cycling Error No Flame IgnHSI Current Low Flame CKTAuto Reset No FlameRunning High LimitManual Reset Inlet LowSensor Open Sensor ShortedLouver Proving Tank OpenAPS Open APS ClosedTemp O/Shoot Rem Ctrl FltService Blk ParametersProgr Low VoltageWatch Dog Error No Error StoredWrite EEProm Program EEProm
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502 - 2072, 402 - 2072 specifications

The Lochinvar 402 - 2072 is a versatile and highly efficient boiler designed to meet the heating demands of modern residential and commercial applications. This model stands out due to its innovative technologies, advanced features, and a high level of reliability, making it an ideal choice for consumers looking for an enduring and economical heating solution.

One of the primary characteristics of the Lochinvar 402 - 2072 is its impressive energy efficiency. With an exceptional annual fuel utilization efficiency (AFUE) rating, this boiler ensures minimal energy waste, allowing homeowners and business operators to save significantly on their energy bills. The model incorporates advanced condensing technology that enables it to extract heat from the combustion gases, maximizing heat transfer and reducing emissions.

The Lochinvar 402 - 2072 is built with a robust stainless steel construction that enhances durability and resilience against corrosion and other environmental factors. This material not only prolongs the lifespan of the unit but also contributes to its outstanding thermal efficiency. Additionally, the boiler's compact design allows for flexible installation options, making it suitable for various spaces, including tight utility rooms and basements.

Equipped with a user-friendly control interface, the Lochinvar 402 - 2072 allows for easy monitoring and adjustment of settings. Its advanced digital display provides real-time data on system performance, ensuring the operator can maintain optimal performance and efficiency.

Another noteworthy feature is the unit's quiet operation. The design includes sound-dampening insulation and high-efficiency circulators, keeping noise to a minimum, which is an essential trait for both residential and commercial settings.

The Lochinvar 402 - 2072 is also designed with safety in mind. It incorporates multiple safety features including an automated vent damper, low water cutoff, and a comprehensive control system that monitors various operating conditions. This proactive approach to safety ensures that potential issues are identified and addressed before they become critical.

In conclusion, the Lochinvar 402 - 2072 boiler presents an exceptional combination of efficiency, durability, and user-friendly features. Its advanced condensing technology, stainless steel construction, and focus on safety make it a leading choice in the competitive boiler market, catering to the heating needs of a diverse range of applications while ensuring environmental responsibility. For those in search of a dependable and efficient heating solution, the Lochinvar 402 - 2072 is certainly worth considering.
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