Lochinvar 1.5, 3.5, 2.5 Outlet Temp High, Rem Ctrl Flt, Parameters Saved, Service Blk

Page 47

Service Manual

3 Troubleshooting (continued)

Table 3G (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

 

 

 

or that the boiler pump is the proper size. Reference

 

 

 

Section 5 - Hydronic Piping of the Knight

Boiler

Outlet Temp

 

 

Installation and Operation Manual for boiler pump

High

Outlet water temperature has exceeded the

 

specifications.

 

(continued)

maximum outlet water temperature.

Inspect the outlet sensors and associated wiring.

 

 

 

 

 

Measure the resistance of the sensors and compare to

 

 

 

the tables on page 38 of this manual.

 

 

 

 

 

 

 

• 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

 

 

 

 

Saved

 

 

 

 

(will require a manual

 

 

 

 

reset once the condition

After downloading parameters from a laptop,

• Press the RESET button on the

SMART

has been corrected. Press

the main control board must be reset.

 

TOUCH display panel.

 

the RESET button on the

 

 

 

SMART TOUCH 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 5 - Hydronic Piping of the

 

 

 

Crest Installation and Operation Manual for the proper

Service Blk

 

 

piping methods for the Crest boiler.

 

 

• 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 5 - Hydronic Piping of the Crest

 

 

 

Installation and Operation Manual for

boiler

 

 

 

pump specifications.

 

 

 

 

 

 

47

Image 47
Contents Models 1.5 2.0 2.5 3.0 Contents Niosh stated First Aid Please read before proceedingHandling ceramic fiber materials When servicing boiler Troubleshooting What is in this manual?Service MaintenanceBoiler piping ServiceHome Screen Control inputs Smart Control ModuleStrip Control outputsHow the control modules operate Access modesGeneral Operation How the boiler operatesTo adjust and save parameters reference FIG Sequence of operation Menu Sub Parameter Name See Min Max Default User InstallerValue Access Parameter tableDelay Ramp BMS Setup Setback HWG Night Pumps Set Points Initial SetupViewable and changeable control parameters Outdoor Reset Ramp Delay Advanced Setup SH/HWG Night Setback Minimum On/Off Time ModBusCascade Cascade OffsetPumps Service Notification Cycles Service NotificationService Notification in Months Service Notification Running Hours8Cascade Screen Service Cascade Screen9Graph ScreenParameter Selection Graph Screen11History ScreenLockout Faults Service History Screen13History ScreenRuntime History 14Service Screen Service ScreenSee the Crest User’s Information Manual for Instructions Maintenance Maintenance and annual startupService technician Owner maintenanceMaintenance Check boiler relief valve Flue vent system and air pipingCheck water system Check expansion tankCheck flame signal Check ignition ground wiringCheck all boiler wiring Check control settingsReview with owner Cleaning boiler heat exchangerCheck control module fuses TroubleshootingBefore troubleshooting Check the followingTroubleshooting Checking temperature sensors No Pump Cutoff Open Low WaterIgnition Anti-cyclingFlame Failure Running Flame Out SequenceFlame Out Unit was running and lost the flame Gas Valve / Relay FailureHigh Limit Open Auto ResetManual Reset High LimitFault Description Corrective Action Outlet Temp Louver Proving Sw OpenFlue Temp High Delta T HighParameters Saved Service BlkOutlet Temp High Rem Ctrl FltFlue Sensor Switch OpenSensor Open Sensor ShortedDifferential TemperatureBurner Supply Writing to Resets Try LaterInternal Fault Too ManyCRC Parameters Watch Dog ErrorNo Error Stored Write EEPromGas Supply Pressure Combustion Analysis ProcedureGas Valve Adjustment Or Obstruction2Gas Valve Adjustment Models 1.5 Gas valve adjustment procedurePage
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3, 2, 3.5, 2.5, 1.5 specifications

Lochinvar is a leader in manufacturing high-efficiency water heating solutions, and their Lochinvar 1.5, 1.3, and 1.0 models exemplify the company's commitment to innovation and performance. These advanced heating systems are designed to meet the diverse needs of commercial and residential applications, providing reliable hot water while ensuring energy efficiency and environmental sustainability.

The Lochinvar 1.5, 1.3, and 1.0 models incorporate cutting-edge technologies that set them apart from traditional water heaters. One of the most notable features is their use of high-efficiency condensing technology, which extracts maximum heat from the combustion process. This process allows the units to achieve high thermal efficiencies, often exceeding 95%, which not only reduces energy costs but also lowers greenhouse gas emissions.

In terms of design, Lochinvar's models are constructed with durable materials, ensuring longevity and reliability in demanding environments. The stainless steel heat exchanger is a key element that contributes to the durability and performance of the units. This material is resistant to corrosion and scale build-up, enhancing the lifespan of the heater and reducing maintenance requirements.

The Lochinvar 1.5, 1.3, and 1.0 models feature advanced control systems that provide precise temperature management and easy operation. The intuitive digital display allows users to monitor performance metrics, temperature settings, and energy consumption with ease. Additionally, these units are equipped with intelligent modulating gas valves that optimize fuel usage based on demand, ensuring efficient operation across various load conditions.

Safety is a priority in the design of Lochinvar's water heaters. The models come with built-in safety features, including flame failure detection, overheat protection, and venting safeguards. These systems work together to ensure the safe operation of the units, giving users peace of mind.

Another characteristic that makes the Lochinvar 1.5, 1.3, and 1.0 models popular among users is their compact design. These units are engineered to fit in tight spaces, making them ideal for installations where space is at a premium. Despite their small footprint, they deliver powerful performance, ensuring that users have access to the hot water they need.

In summary, Lochinvar's 1.5, 1.3, and 1.0 water heating models represent the pinnacle of efficiency, safety, and reliability. With their advanced technologies, durable construction, and user-friendly features, these units are an excellent choice for anyone seeking a high-performance water heating solution.