Lochinvar 502 - 2072, 402 - 2072 Louver Proving, Tank Open, APS Open, APS Closed, Wrong ID Plug

Page 39

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

3 Troubleshooting (continued)

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

FAULT

DESCRIPTION

CORRECTIVE ACTION

 

 

 

 

 

 

 

 

Louver Proving

 

 

 

 

 

 

(Lockout will reset

 

 

 

 

 

 

automatically after

 

• Check function of remote devices.

 

5 minutes or may be

An optional remote proving switch is not

 

reset immediately once

 

 

 

 

 

condition has been

making.

• Check

for loose

or

misplaced jumper

if

corrected. Press the

 

proving switch is not installed.

 

RESET button on the

 

 

 

 

 

 

SMART SYSTEM display

 

 

 

 

 

 

to reset.)

 

 

 

 

 

 

 

 

 

 

 

Sensors equipped with an internal limit (such

• Check the tank temperature.

 

Tank Open

as the Lochinvar Squire® Indirect Tank), the

• Repair or replace the sensor wiring if damaged.

 

 

limit has opened due to temperature (195°F)

 

 

 

 

 

 

or the sensor has become disconnected.

• Replace the sensor if necessary.

 

 

 

 

 

 

 

 

APS Open

 

• Check air filter. Clean or replace as necessary.

 

(Lockout will reset

 

• Vent/air intake lengths exceed the maximum allowed

automatically after 5

 

minutes or may be

The air pressure switch did not make within

lengths.

 

 

 

 

reset immediately once

 

 

 

 

 

1 minute after the combustion air blower has

• Check for blockage or obstruction in vent/air inlet pipe

condition has been

corrected. Press the

been energized.

or at terminations.

 

 

 

 

 

 

 

RESET button on the

 

• Verify combustion air blower is operating. Replace if

SMART SYSTEM display

 

to reset.)

 

necessary.

 

 

 

 

 

 

 

 

 

 

APS Closed

 

 

 

 

 

 

(Lockout will reset

 

• Check for jumper on air pressure switch.

 

automatically after 5

 

 

minutes or may be

The SMART SYSTEM control sensed that

• Check for an unusually high negative draft in the vent

reset immediately once

the air pressure switch was closed before the

condition has been

combustion air blower was energized.

stack.

 

 

 

 

corrected. Press the

 

 

 

 

 

 

 

 

 

 

 

RESET button on the

 

 

 

 

 

 

SMART SYSTEM display

 

 

 

 

 

 

to reset.)

 

 

 

 

 

 

 

 

 

 

 

• Verify that ID plug is connected properly to connector

 

 

X5 on the control module.

 

 

 

 

• Verify that the wiring in the ID plug is not cut or

 

 

damaged and that the wiring connectors are seated

 

 

properly in the plug.

 

 

 

Wrong ID Plug

Control module ID plug does not match

• Verify that the number on the ID plug matches the

parameter L5.

number in parameter L5.

If not, replace the control

 

 

 

module.

 

 

 

 

 

 

• When replacing control modules, verify that the

 

 

number in parameter L5 matches the number on the

 

 

ID plug

(reference

page

22 of this manual).

If

 

 

so, press the ENTER button on the SMART

 

 

SYSTEM display. If not, replace the control module.

 

 

 

 

 

 

 

39

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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 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 Parameter table Datalogging Functions Settingsdhw ResetoutdoorAnti-cycle Delay Yes Viewable and changeable control parameters Temperature settings boiler onlyFunctions 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 valve Inspect/replace hot surface igniterPerform start-up and checks Check all wiringCheck control settings Inspect and clean burnerChecking combustion air pressure Access to the burner will require the following stepsChecking manifold gas pressure Adjusting combustion air pressureValve Fitting Control Knob Inspect and clean the heat exchanger Review with ownerOiled bearing circulators Check the following TroubleshootingBefore troubleshooting Check control module fusesUnit Does Not No DisplayNo Burner OperationChecking temperature sensors Resistance TemperatureTemperature Resistance DHW Pump NoisyNo Pump 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 OpenRem Ctrl Flt Temp O/ShootLow Voltage Service BlkParameters ProgrProgram EEProm Watch Dog ErrorNo Error Stored Write 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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