Lochinvar 402 - 2072, 502 - 2072 service manual Temp O/Shoot, Rem Ctrl Flt

Page 40

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 temperature rise across the heat

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

 

exchanger has exceeded the set parameters

has been properly purged from the system.

 

for the appliance.

• 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.

 

 

• Check for 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

Temp O/Shoot

 

control board if necessary.

 

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

(Lockout will reset

 

automatically after 5

 

pump is not operating, replace the pump.

minutes or may be

 

 

 

 

reset immediately once

Outlet water temperature has exceeded the

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

condition has been

maximum outlet water temperature.

has been properly purged from the system.

corrected. Press the

 

 

RESET button on the

 

• Verify that the appliance is piped properly into the

SMART SYSTEM display

 

system. Refer to the Water Connections Section of

to reset.)

 

the Installation and Operation Manual for the proper

 

 

piping methods.

 

 

• Check 120 VAC to the pump motor on a call for heat.

 

 

If voltage is not present, check 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 pump.

 

 

• Replace the main control board.

 

 

 

 

External control is cycling too often.

• Check set point of the external control.

Rem Ctrl Flt

 

• Check the wiring between the external control and

 

the unit.

 

 

 

 

• Replace the control.

 

 

 

40

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Contents Copper-fin II/IIE Boiler, Water Heater Pool Heater Contents Handling ceramic fiber materials Please read before proceedingNiosh 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 Review with owner Inspect and clean the heat exchangerOiled bearing circulators Troubleshooting Before troubleshootingCheck control module fuses Check the followingNo Display No BurnerOperation Unit Does NotResistance Temperature Checking temperature sensorsTemperature Resistance Noisy No PumpBoiler Pump System Pump DHW PumpFlame Sequence Flow SwitchAnti-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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