Lochinvar Troubleshooting Boiler ARHL and MRHL Lockout Issues
Page 40

Service Manual

3 Troubleshooting

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

FAULT

DESCRIPTION

 

CORRECTIVE ACTION

 

 

 

 

 

 

• Adjust the set point of the auto reset limit to a higher

 

 

setting up to a maximum of 200°F. Reference the

 

 

Knight XL Installation and Operation Manual for

 

 

adjusting procedures.

 

 

 

 

 

• 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.

 

 

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

 

 

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

 

The outlet water temperature has exceeded

the main control board.

 

 

 

Outlet ARHL

• Replace the main control board if necessary.

 

the setting of the automatic reset high limit.

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

 

 

 

 

pump is not operating, replace the pump.

 

 

 

• If the system pump is a variable speed pump, ensure

 

 

that the system flow is not less than the boiler flow.

 

 

• If operating on something other than an outlet sensor,

 

 

check temperature setting of the main control board.

 

 

• If the optional manual reset high limit has tripped,

 

 

check setting of the device.

 

 

 

 

 

• Check resistance of water sensors and compare to

 

 

Table 3-2A on page 35 of this manual. Replace

 

 

sensor if necessary.

 

 

 

 

 

• Replace high limit.

 

 

 

 

 

 

 

 

• Adjust the set point of the manual reset limit to a higher

 

 

setting up to a maximum of 210°F. Reference the

Outlet MRHL

 

Knight XL Installation and Operation Manual for

 

adjusting procedures.

 

 

 

(will require a manual

 

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

reset once the condition

The outlet water temperature has exceeded

has been properly purged from the system.

 

has been corrected.

• Verify that the boiler is piped properly into the heating

Press the RESET

the setting of the manual reset high limit.

system.

Refer to Section 6 - Hydronic Piping of the

button on the SMART

 

SYSTEM display to

 

Knight

XL

Installation

and

Operation

Manual

 

for the proper piping methods for the Knight XL boiler.

reset.)

 

 

 

 

 

 

 

 

 

 

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

 

 

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

 

 

the main control board.

 

 

 

 

 

 

 

 

 

 

 

40

Page 39 Page 41
Image 40
Page 39 Page 41
Contents Models 400 Contents Handling ceramic fiber materials Please read before proceedingNiosh stated First Aid When servicing boiler What is in this manual? ServiceMaintenance TroubleshootingService Near boiler pipingKnight XL display Navigation DialControl inputs LOW Voltage Connection BoardSmart Control Module Control outputsAccess modes General OperationHow the boiler operates How the control module operatesOperation Display From previous page Sequence of Operation Display panel menu access Button Screen Operation Display StatusDisplay panel parameter access Button Screen Status Operation DisplayParameter table Description See User Access Installer Access Display ModifyMenu DHW Settings Resetoutdoor See User Access Installer Access Display Modify DescriptionBMS Service Notification Temperature units C / F Viewable and changeable control parametersTime and Date Software VersionData Logging Temperature SettingsFunctions DHW Settings Outdoor Reset Anti-Cycling Ramp Settings Control modesControlling Sensor BMS Thermostat InputCascade Offset Minimum On/Off TimeCirculation pumps Service Notification Service technician Maintenance Maintenance and annual startupOwner maintenance Maintenance Flue vent system and air piping Check water systemCheck expansion tank Check boiler relief valveCheck ignition ground wiring Check all boiler wiringCheck control settings Inspect ignition and flame sense electrodesCheck flame signal Cleaning boiler heat exchangerReview with owner Model Kit Part Component Number DescriptionTroubleshooting Before troubleshootingCheck control module fuses Check the followingNo Display No BurnerOperation Unit DoesChecking temperature sensors Temperature Resistance Temperature ResistanceWire Color R/BK and Y Wire Color G and Y Resistance TemperatureNoisy No PumpBoiler Pump System PumpTroubleshooting Temp Sw OpenAnti-cycling Flame Fail IgnCont’d Flame SequenceOutlet Arhl Outlet MrhlFan Low/High Fan Speed LowHigh GV/RelayFault Sensor ShortedLouver Proving Inlet SensorFlue Sensor Fault Fatal ErrorMemory Error Flue Temp DiffDelta T High Flue Temp HighOutlet Temp Service Blk Watch Dog ErrorNo Error Stored Rem Ctrl FltCombustion Analysis Procedure Model Gas valve adjustment procedureModels 601
Related manuals
Manual 16 pages 54.19 Kb Manual 80 pages 32.08 Kb

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.
Top Page Image Contents