Lochinvar 400 - 801 service manual Rem Ctrl Flt, Parameters Progr, Service Blk

Page 42

Service Manual

3Troubleshooting

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

FAULT

DESCRIPTION

CORRECTIVE ACTION

 

 

 

 

 

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

Outlet Temp

 

or that the boiler pump is the proper size. Reference

 

Section 6 - Hydronic Piping of the

Knight XL

High

Outlet water temperature has exceeded the

Installation and Operation Manual for boiler pump

(continued)

maximum outlet water temperature.

specifications.

 

 

 

• Replace the main control board.

 

 

 

 

 

 

 

• Check set point of the external control.

 

 

 

• Check the wiring between the external control and the

Rem Ctrl Flt

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.)

 

 

 

 

 

 

 

While the unit is in Service Mode, the outlet

• Establish a heating load to remove the heat from the

 

temperature has exceeded 185°F.

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

 

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

 

 

 

 

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.

 

 

 

 

 

42

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Contents Models 400 Contents Please read before proceeding Handling ceramic fiber materialsNiosh stated First Aid When servicing boiler Maintenance What is in this manual?Service TroubleshootingService Near boiler pipingKnight XL display Navigation DialControl inputs LOW Voltage Connection BoardSmart Control Module Control outputsHow the boiler operates Access modesGeneral Operation How the control module operatesOperation Display From previous page Sequence of Operation Display panel menu access Button Screen Operation Display StatusDisplay panel parameter access Parameter table GeneralSettings Reset Notification Date and Time Temperature units C / FViewable and changeable control parameters Software VersionTemperature Settings Data LoggingFunctions DHW Settings Outdoor Reset Anti-Cycling Controlling Sensor SH Ramp DelayControl modes BMS Thermostat Input Active / InactiveCascade Offset Minimum On/Off TimeCirculation pumps Service Notification Maintenance Maintenance and annual startup Service technicianOwner maintenance Maintenance Check expansion tank Flue vent system and air pipingCheck water system Check boiler relief valveCheck control settings Check ignition ground wiringCheck all boiler wiring Inspect ignition and flame sense electrodesReview with owner Check flame signalCleaning boiler heat exchanger Model Kit Part Component Number DescriptionCheck control module fuses TroubleshootingBefore troubleshooting Check the followingOperation No DisplayNo Burner Unit Does NotWire Color R/BK and Y Wire Color G and Y Checking temperature sensorsTemperature Resistance Resistance TemperatureBoiler Pump System Pump NoisyNo Pump DHW PumpSwitch/LWCO FlowAnti-cycling Flame Fail IgnHigh Limit Auto ResetFlame Sequence Fan LowFan High GV/RelayFail Fan Speed HighOutlet Temp Flue Temp HighDelta T High HighService Blk Rem Ctrl FltParameters Progr Low 24 vac Watch Dog ErrorNo Error Stored Write EEPromOr Obstruction Combustion Analysis ProcedureGas Valve Adjustment Gas Supply PressureGas valve adjustment procedure ModelModels 601 Page
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