Lochinvar 400, 801 Rem Ctrl Flt, Parameters Progr, Service Blk, Low 24 vac, Watch Dog Error

Page 45

Service Manual

3 Troubleshooting (continued)

Table 3-4(continued from previous page) Troubleshooting Chart - Fault Messages Displayed on Boiler Interface

FAULT

DESCRIPTION

 

CORRECTIVE ACTION

 

 

 

 

 

 

 

 

• Check set point of the external control.

 

 

 

Rem Ctrl Flt

 

• Check the wiring between the external control and the

External control is cycling too often.

unit.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

• Replace the control.

 

 

 

 

 

 

 

 

 

 

 

 

 

Parameters

 

 

 

 

 

 

 

 

Progr

 

 

 

 

 

 

 

 

(will require a manual

 

 

 

 

 

 

 

 

reset once the condition

After downloading parameters from a laptop,

• Press the ENTER/RESET button on the SMART

has been corrected. Press

the main control board must be reset.

SYSTEM display panel.

 

 

 

 

the RESET button on the

 

 

 

 

 

 

 

SMART SYSTEM display

 

 

 

 

 

 

 

 

to reset.)

 

 

 

 

 

 

 

 

 

 

 

 

 

• Establish a heating load to remove the heat from the

 

 

boiler loop.

 

 

 

 

 

 

 

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

 

 

has been properly purged from the system.

 

 

• Verify that the boiler is piped properly into the heating

 

 

system. Refer to Section 6 - Hydronic Piping of the

 

 

Knight

XL

Installation

and

Operation

 

 

Manual for the proper piping methods for the Knight

 

 

XL boiler.

 

 

 

 

 

Service Blk

While the unit is in Service Mode, the outlet

• Check 120 vac to the boiler pump motor on a call for

 

temperature has exceeded 185°F.

heat. If voltage is not present, check the wiring back

 

 

to the main control board. Replace the main control

 

 

board if necessary.

 

 

 

 

 

 

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

 

 

pump is not operating, replace the pump.

 

 

 

 

 

• Verify that the boiler pump is set to the proper speed

 

 

or that the boiler pump is the proper size. Reference

 

 

Section

6 -

Hydronic Piping of

the Knight

 

 

XL Installation and Operation Manual for boiler

 

 

pump specifications.

 

 

 

 

 

 

 

 

 

 

 

 

• Check 120 vac supply to the transformer.

 

 

 

Low 24 vac

120 vac input to the main control board has

• Check wiring connections at the low voltage

dropped below 80 vac.

terminal strip.

 

 

 

 

 

 

• Check the wire size/length to remote devices.

 

 

 

 

• Replace the transformer.

 

 

 

 

 

 

 

 

 

 

 

Watch Dog Error

The main control board has detected an

• Replace the main control board.

 

 

 

 

 

internal fault.

 

 

 

 

 

 

 

Write EEProm

The main control board has detected an

• Replace the main control board.

 

 

 

 

internal fault.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CRC Parameters

The main control board has detected an

• Replace the main control board.

 

 

 

 

 

internal fault.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

No Error Stored

The main control board has detected an

• Replace the main control board.

 

 

 

 

 

internal fault.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

45

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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Contents Models 400 Contents Please read before proceeding Handling ceramic fiber materialsNiosh stated First Aid When servicing boiler Service What is in this manual?Maintenance TroubleshootingNear boiler piping ServiceNavigation Dial Knight XL displayLOW Voltage Connection Board Control inputsControl outputs Smart Control ModuleGeneral Operation Access modesHow the boiler operates How the control module operatesOperation Display From previous page Sequence of Operation Button Screen Operation Display Status Display panel menu accessButton Screen Status Operation Display Display panel parameter accessDescription See User Access Installer Access Display Modify Parameter tableMenu DHW Settings Resetoutdoor Description See User Access Installer Access Display ModifyBMS Service Notification Viewable and changeable control parameters Temperature units C / FTime and Date Software VersionTemperature Settings Data LoggingFunctions DHW Settings Outdoor Reset Anti-Cycling Control modes Ramp SettingsControlling Sensor BMS Thermostat InputMinimum On/Off Time Cascade OffsetCirculation pumps Service Notification Maintenance Maintenance and annual startup Service technicianOwner maintenance Maintenance Check water system Flue vent system and air pipingCheck expansion tank Check boiler relief valveCheck all boiler wiring Check ignition ground wiringCheck control settings Inspect ignition and flame sense electrodesCleaning boiler heat exchanger Check flame signalReview with owner Model Kit Part Component Number DescriptionBefore troubleshooting TroubleshootingCheck control module fuses Check the followingNo Burner No DisplayOperation Unit DoesTemperature Resistance Temperature Resistance Checking temperature sensorsWire Color R/BK and Y Wire Color G and Y Resistance TemperatureNo Pump NoisyBoiler Pump System PumpTroubleshooting Open Temp SwAnti-cycling Flame Fail IgnFlame Sequence Cont’dOutlet Mrhl Outlet ArhlFan Speed Low Fan Low/HighHigh GV/RelaySensor Shorted FaultLouver Proving Inlet SensorFatal Error Flue Sensor FaultMemory Error Flue Temp DiffFlue Temp High Delta T HighOutlet Temp Watch Dog Error Service BlkNo Error Stored Rem Ctrl FltCombustion Analysis Procedure Gas valve adjustment procedure ModelModels 601
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400, 801 specifications

The Lochinvar 801,400 is a cutting-edge solution in the realm of high-efficiency commercial water heating. This model represents a significant advancement in the design and functionality of water heaters, catering primarily to the demands of large-scale facilities like hotels, hospitals, and large industrial operations.

One of the standout features of the Lochinvar 801,400 is its impressive heating capacity, which can produce up to 801,400 BTUs, making it suitable for high-demand applications. This output is crucial for establishments that require a consistent supply of hot water, such as commercial kitchens and laundry facilities. The robust design ensures that it can handle peak demand periods without compromising performance.

Another significant aspect is the innovative use of advanced technology in its operation. The Lochinvar 801,400 integrates smart controls that enhance its efficiency and ease of operation. These controls allow for precise monitoring and adjustment of water temperatures, ensuring that the system operates within optimal parameters while maximizing energy savings. The intelligent monitoring system can provide real-time updates, making it easier for facility managers to keep track of performance and address maintenance needs proactively.

The construction of the Lochinvar 801,400 incorporates durable materials that not only enhance the longevity of the unit but also offer resistance to corrosion and wear. This durability translates into lower maintenance costs and an extended lifespan for the unit, making it a worthwhile investment for businesses.

Moreover, the Lochinvar 801,400 is designed with energy efficiency in mind. It boasts a high thermal efficiency rating, which reduces operational costs and minimizes the carbon footprint of heating operations. This efficiency is critical in today’s environmentally conscious market, where businesses are seeking to reduce their energy consumption and comply with strict regulations.

The design of the Lochinvar 801,400 also prioritizes safety, featuring innovative safety controls and fail-safes that protect both the unit and the users.

In summary, the Lochinvar 801,400 offers a combination of high capacity, advanced technology, durability, and energy efficiency, making it an excellent choice for commercial water heating solutions. As industries continue to evolve, the demand for reliable and efficient water heating solutions like the Lochinvar 801,400 will only increase.
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