Lochinvar 3.5, 1.5, 2.5 Louver Proving Sw Open, Flue Temp High, Delta T High, Outlet Temp

Page 46

Service Manual

3 Troubleshooting

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

FAULT

DESCRIPTION

 

CORRECTIVE ACTION

 

 

 

 

 

 

 

 

Louver Proving

 

 

 

 

 

 

Sw Open

 

• Check function of remote devices.

 

(will require a manual

An optional remote proving switch is not

 

reset once the condition

 

 

 

 

 

has been corrected. Press

making.

• Check for loose or misplaced jumper if proving switch

the RESET button on the

 

is not installed.

 

 

 

SMART TOUCH display

 

 

 

 

 

 

to reset.)

 

 

 

 

 

 

 

 

 

 

 

• Inspect the heat exchanger. Reference page 35 of

 

 

this manual for the procedure on how to clean the flue

 

 

side of the heat exchanger.

 

 

 

 

• Inspect the flue sensor and associated wiring.

Flue Temp High

The stack temperature has exceeded the set

Measure the resistance of the flue sensor and

parameters for the boiler.

compare to Table 3E on page 38 of this manual.

 

 

Replace the sensor if necessary.

 

 

 

• Verify that the vent/air intake pipes are properly

 

 

installed and that there are no obstructions.

 

 

 

• 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 piping methods for the Crest boiler.

 

 

• Check for 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

Delta T High

The temperature rise across the heat

control board if necessary.

 

 

 

 

 

 

 

 

exchanger has exceeded the set parameters

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

 

for the boiler.

pump is not operating, replace the pump.

 

 

 

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

 

 

or that the pump is the proper size. Reference

 

 

Section 5 - Hydronic Piping of the Crest

 

 

Installation and Operation Manual for

boiler

 

 

pump specifications.

 

 

 

 

 

• Inspect the inlet and outlet sensors and associated

 

 

wiring. Measure the resistance of the sensors and

 

 

compare to the tables on page 38 of this manual.

 

 

 

 

 

• 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

Outlet Temp

 

Crest

Installation

and

Operation

Manual

Outlet water temperature has exceeded the

for the proper piping methods for the Crest boiler.

High

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

 

maximum outlet water temperature.

 

 

for heat. If voltage is not present, check 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.

 

 

 

 

 

 

 

 

46

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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 Maintenance What is in this manual?Service TroubleshootingService Boiler pipingHome Screen Smart Control Module Control inputsControl outputs StripHow the boiler operates Access modesGeneral Operation How the control modules operateTo adjust and save parameters reference FIG Sequence of operation Parameter table Sub Parameter Name See Min Max Default User InstallerValue Access 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 Offset ModBusCascade Minimum On/Off TimePumps Service Notification Running Hours Service NotificationService Notification in Months Service Notification CyclesService Cascade Screen 8Cascade ScreenGraph Screen 9Graph ScreenParameter SelectionService History Screen 11History ScreenLockout Faults13History ScreenRuntime History Service Screen 14Service ScreenOwner maintenance Maintenance Maintenance and annual startupService technician See the Crest User’s Information Manual for InstructionsMaintenance Check expansion tank Flue vent system and air pipingCheck water system Check boiler relief valveCheck control settings Check ignition ground wiringCheck all boiler wiring Check flame signalCleaning boiler heat exchanger Review with ownerCheck the following TroubleshootingBefore troubleshooting Check control module fusesTroubleshooting Checking temperature sensors No Pump Low Water Cutoff OpenFlame Failure Anti-cyclingIgnition Flame Out Flame Out SequenceRunning Gas Valve / Relay Failure Unit was running and lost the flameHigh Limit Auto ResetManual Reset High Limit OpenFault Description Corrective Action Delta T High Louver Proving Sw OpenFlue Temp High Outlet TempRem Ctrl Flt Service BlkOutlet Temp High Parameters SavedSensor Shorted Switch OpenSensor Open Flue SensorBurner Supply TemperatureDifferential Too Many Resets Try LaterInternal Fault Writing toWrite EEProm Watch Dog ErrorNo Error Stored CRC ParametersOr Obstruction Combustion Analysis ProcedureGas Valve Adjustment Gas Supply PressureGas valve adjustment procedure 2Gas Valve Adjustment Models 1.5Page
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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.
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