Lochinvar 402, 2072 service manual No Flame, Running, Auto Reset, High Limit

Page 39

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

3 Troubleshooting (continued)

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

FAULT

DESCRIPTION

CORRECTIVE ACTION

 

 

 

 

 

 

The unit was running and lost the flame signal.

• Inspect igniter and associated wiring for damage and

 

 

connection. Reference page 27 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

No Flame

 

Gas Connections Section of the Installation and

 

Operation Manual for detailed information concerning

Running

 

the gas supply.

 

 

 

 

(Will require a manual

 

• Verify that

the

tube from

the gas valve

to

the

reset once the condition

 

 

combustion

air

chamber is

connected and

is

not

has been corrected. Press

 

 

damaged.

 

 

 

 

 

the RESET button on the

 

 

 

 

 

 

 

 

 

 

 

 

 

SMART SYSTEM display

 

• Verify that the vent/air intake pipes are installed

to reset.)

 

correctly and there are no obstructions.

 

 

 

 

• Refer to the Checking Manifold Gas Pressure and

 

 

Combustion Analysis Procedure on pages 29 and 30

 

 

of this manual for the proper settings.

 

 

 

 

• Inspect the burners. Reference pages 28 and 29

 

 

of this manual for removal and cleaning procedures.

 

 

Replace if necessary.

 

 

 

 

 

• Replace the main control board.

 

 

 

 

 

 

The outlet water temperature has exceeded the

• Verify that the system is full of water and that all air

 

setting of the automatic reset high limit.

has been properly purged from the system.

 

 

 

 

• Verify that the appliance is piped properly into the

 

 

heating system. Refer to the Water Connections

 

 

Section of the Installation and Operation Manual for

 

 

the proper piping methods for the Copper-fin.

 

 

 

 

• Check 120 VAC to boiler pump motor on a call for

 

 

heat. If voltage is not present, check wiring back

 

 

to the main control board. Replace the main

 

 

control board if necessary.

 

 

 

Auto Reset

 

• If 120 VAC is present on a call for heat and the

High Limit

 

pump is not operating, replace the pump.

 

 

 

 

• If the system pump is a variable speed pump,

 

 

ensure that the system flow is not less than the

 

 

boiler flow.

 

 

 

 

 

 

 

• Check temperature setting of the main control

 

 

board.

 

 

 

 

 

 

 

• Check resistance of water sensors and compare to

 

 

Table 3B on page 35 of this manual. Replace

 

 

sensor if necessary.

 

 

 

 

 

• Replace outlet sensor.

 

 

 

 

 

 

 

 

 

 

 

39

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Contents Copper-fin II/IIE Boiler and Water Heater Models 402 Contents Please read before proceeding Handling ceramic fiber materialsNiosh stated First Aid Troubleshooting What is in this manual?Service MaintenanceCopper-fin display ServiceControl inputs Control outputs Sequence of operation General OperationHow the appliance operates How the control module operatesOUT 123.8F129 Sequence of operationHTR Postpurge Display panel menu access Display panel parameter access Only Parameter table a Boiler OperationAnti-cycle Time Anti Cycl Tm Parameter table B Water Heater Operation BMS Service Notification Pumps Viewable and changeable control parameters Temperature settingsFunctions Data loggingDHW settings Outdoor air reset boiler only Anti-cycling Control modes Cascade Building Management System BMSCirculation pumps Service NotificationSee the User’s Information Manual for instructions Maintenance Maintenance and annual startupService technician Owner maintenanceMaintenance Check relief valve Inspect/replace hot surface ignitersInspect/replace hot surface igniter Perform start-up and checks Check all wiringCheck control settings Inspect and clean burner2Adjusting air shutter 399,999 750,000 Btu/ hr Models Checking manifold gas pressure Adjusting combustion air pressurePressure Regulator Chamber Adjustment Manifold Inspect and clean the heat exchanger Review with ownerOiled bearing circulators Check the following TroubleshootingBefore troubleshooting Check control module fusesUnit Does No DisplayNo Burner OperationChecking temperature sensors Resistance TemperatureTemperature Resistance DHW Pump NoisyNo Pump Operation Boiler Pump System PumpFlow Switch Flame SequenceAnti-cycling Flame CKT ErrorNo Flame Ign HSI Current LowHigh Limit Auto ResetNo Flame RunningSensor Shorted Manual ResetInlet Low Sensor OpenAPS Closed Louver ProvingTank Open APS OpenTemp O/Shoot Rem Ctrl FltParameters Progr Low Voltage Service BlkWatch Dog Error No Error Stored
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402, 2072 specifications

Lochinvar 2072,502 is an innovative and robust water-heating solution tailored for residential and commercial applications. This model represents a significant advancement in energy efficiency and performance, catering to the dynamic heating requirements of modern buildings.

One of the standout features of Lochinvar 2072,502 is its advanced thermal efficiency. With an impressive AFUE (Annual Fuel Utilization Efficiency) rating, the unit delivers exceptional heat output while minimizing energy consumption. This not only reduces utility bills for homeowners and businesses but also supports sustainability efforts by decreasing carbon footprints.

The Lochinvar 2072,502 incorporates cutting-edge technologies that set it apart in the market. It is equipped with advanced control systems that allow users to precisely manage heating outputs, ensuring optimal comfort while conserving energy. The user-friendly digital display provides real-time data, allowing for efficient monitoring and control.

Another significant characteristic of the Lochinvar 2072,502 is its robust stainless-steel construction. This feature enhances the unit's durability and longevity, ensuring reliable performance even in challenging conditions. The high-quality materials also contribute to maintaining consistent water temperatures, which is essential for both residential and commercial heating needs.

The Lochinvar 2072,502 operates silently, making it ideal for installations in areas where noise is a concern. Its compact design allows for flexible installation options, fitting seamlessly into various spaces, whether it’s a utility room, basement, or outdoor area.

Furthermore, the unit supports multiple venting options, accommodating different building architectures and layouts. This versatility makes it an ideal choice for new builds and retrofitting existing systems.

Maintenance is streamlined with the Lochinvar 2072,502, as it features a self-diagnostics system that simplifies troubleshooting. Regular service check-ups are made easier with accessible components, allowing technicians to perform maintenance tasks efficiently.

In summary, the Lochinvar 2072,502 stands out for its high efficiency, advanced technology, durability, and flexible installation options. It is an ideal choice for those seeking a reliable and technologically advanced water-heating solution that meets the challenges of contemporary heating demands while promoting energy savings and environmental responsibility.
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