Lochinvar 1.5, 3.5, 2.5 service manual Troubleshooting

Page 37

 

 

 

 

 

 

 

 

 

Service Manual

3 Troubleshooting (continued)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Table 3A Troubleshooting Chart - No Display

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FAULT

CAUSE

 

 

CORRECTIVE ACTION

 

 

 

 

 

 

 

- No 120 vac supplied to unit.

Check external line switch, fuse, or breaker.

 

 

 

 

Check position of ON/OFF switch. Turn switch to the

 

 

 

 

ON position.

 

 

 

 

 

 

 

 

 

• Check 120 vac through the ON/OFF switch.

 

 

 

 

• Check wiring

harness connection

between

display

 

 

 

 

board

and

main

control

board. Connect

No Display

 

 

 

harness at both points.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

- No voltage through the switch.

Replace switch.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

- Bad display board.

Replace board.

 

 

 

 

 

 

 

 

 

 

 

 

 

- Bad main control board.

Replace the main control board.

 

 

 

 

 

 

 

 

 

 

- Blown fuse.

• Replace

fuse

F2 on

the main control board, see

 

 

 

 

page 38 of this manual.

 

 

 

 

 

 

 

 

 

 

 

 

 

- Main control board temperature set point

Review temperature setting.

 

 

 

 

 

satisfied.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

- Remote thermostat satisfied.

Review remote thermostat setting.

 

 

 

No Burner

 

 

 

 

 

 

 

 

 

 

 

 

- Outside air temperature above Warm

Check

location of

outside

air

sensor.

Check

Operation

Weather Shutdown (WWSD) set point for

 

resistance of outdoor air sensor and compare to Table

 

 

 

main control board.

 

3C on page 38 of this manual.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

- Unit locked out on fault.

Consult

display for

specific

fault.

Refer

to fault

 

 

 

 

descriptions on page 40 of this manual for corrective

 

 

 

 

actions.

 

 

 

 

 

 

 

 

 

 

 

 

- Ramp delay active.

Check ramp delay parameter settings. Optional PC

 

 

 

 

software required.

 

 

 

 

 

Unit Does Not

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Turn ramp delay feature off.

See page 20 of this

Modulate

 

 

Up to 100%

 

 

 

manual for instructions on how to turn this feature off.

 

- Boiler controlled by BMS.

Check BMS parameter settings.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

37

Image 37
Contents Models 1.5 2.0 2.5 3.0 Contents Handling ceramic fiber materials Please read before proceedingNiosh stated First Aid When servicing boiler Service What is in this manual?Maintenance TroubleshootingBoiler piping ServiceHome Screen Control inputs Smart Control ModuleStrip Control outputsGeneral Operation Access modesHow the boiler operates How the control modules operateTo adjust and save parameters reference FIG Sequence of operation Value Access Sub Parameter Name See Min Max Default User InstallerParameter table MenuDelay Ramp BMS Setup Setback HWG Night Pumps Viewable and changeable control parameters Initial SetupSet Points Outdoor Reset Ramp Delay Advanced Setup SH/HWG Night Setback Cascade ModBusCascade Offset Minimum On/Off TimePumps Service Notification in Months Service NotificationService Notification Running Hours Service Notification Cycles8Cascade Screen Service Cascade Screen9Graph ScreenParameter Selection Graph Screen11History ScreenLockout Faults Service History Screen13History ScreenRuntime History 14Service Screen Service ScreenService technician Maintenance Maintenance and annual startupOwner maintenance See the Crest User’s Information Manual for InstructionsMaintenance Check water system Flue vent system and air pipingCheck expansion tank Check boiler relief valveCheck all boiler wiring Check ignition ground wiringCheck control settings Check flame signalReview with owner Cleaning boiler heat exchangerBefore troubleshooting TroubleshootingCheck the following Check control module fusesTroubleshooting Checking temperature sensors No Pump Cutoff Open Low WaterFlame Failure Anti-cyclingIgnition Flame Out Flame Out SequenceRunning Unit was running and lost the flame Gas Valve / Relay FailureManual Reset Auto ResetHigh Limit High Limit OpenFault Description Corrective Action Flue Temp High Louver Proving Sw OpenDelta T High Outlet TempOutlet Temp High Service BlkRem Ctrl Flt Parameters SavedSensor Open Switch OpenSensor Shorted Flue SensorBurner Supply TemperatureDifferential Internal Fault Resets Try LaterToo Many Writing toNo Error Stored Watch Dog ErrorWrite EEProm CRC ParametersGas Valve Adjustment Combustion Analysis ProcedureOr Obstruction Gas Supply Pressure2Gas 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.