Lochinvar 402, 2072 Service Blk, Low Voltage, Watch Dog Error, Write EEProm, Program EEProm

Page 43

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

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

• Establish a heating load to remove heat from

the

 

 

 

 

 

 

 

 

system.

 

 

 

 

 

 

 

 

 

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

 

 

 

 

 

 

 

 

has been properly purged from the system.

 

 

 

 

 

 

 

 

 

• Verify that the appliance is piped properly

into

the

 

 

 

 

 

 

 

 

system. Refer to the Water Connections Section of

Service Blk

While the unit is in Service Mode, the outlet

 

the Installation and Operation Manual for the proper

temperature has exceeded 185°F (85°C).

 

 

piping methods.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

• Check 120 VAC to the pump motor on a

call

for

 

 

 

 

 

 

 

 

heat. If voltage is not present, check the wiring

 

 

 

 

 

 

 

 

leading to the main control board. Replace the main

 

 

 

 

 

 

 

 

control board if necessary.

 

 

 

 

 

 

 

 

 

• If 120 VAC is present on a call for heat

and

the

 

 

 

 

 

 

 

 

pump is not operating, replace the pump.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

• Check 120 VAC supply to the transformer.

 

 

 

 

 

 

 

 

 

• Check wiring connections at the low voltage terminal

Low Voltage

120 VAC input to the main control board has

 

strip.

 

 

dropped below 100 VAC.

 

 

 

 

 

 

 

 

 

 

 

• Check the wire size/length to remote devices.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

• Replace the main control board.

 

 

 

 

 

 

 

 

 

 

 

 

 

Watch Dog Error

The

main control

board

has

detected

an

•

Cycle main power.

 

 

internal fault.

 

 

 

 

• Replace the main control board.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Write EEProm

The

main control

board

has

detected

an

•

Cycle main power.

 

 

internal fault.

 

 

 

 

• Replace the main control board.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Program EEProm

The

main control

board

has

detected

an

•

Cycle main power.

 

 

internal fault.

 

 

 

 

• Replace the main control board.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CRC Parameters

 

 

 

 

 

 

•

Cycle main power.

 

 

The

main control board has detected an

• Replace the main control board.

 

 

 

internal fault.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

• Restore default parameters using the PC program.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

•

Press RESET.

 

 

No Error Stored

The

main control board has detected an

•

Cycle main power.

 

 

 

internal fault.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

• Replace the main control board.

 

 

 

 

 

 

 

 

 

 

 

 

 

43

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Page 42 Page 44
Contents Copper-fin II/IIE Boiler and Water Heater Models 402 Contents Handling ceramic fiber materials Please read before proceedingNiosh 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 Inspect/replace hot surface igniters Check relief valveInspect/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 Review with owner Inspect and clean the heat exchangerOiled bearing circulators Check the following TroubleshootingBefore troubleshooting Check control module fusesUnit Does No DisplayNo Burner OperationResistance Temperature Checking temperature sensorsTemperature Resistance DHW Pump NoisyNo Pump Operation Boiler Pump System PumpFlame Sequence Flow SwitchAnti-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 OpenRem Ctrl Flt Temp O/ShootParameters 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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