Lochinvar 1.5 Too Many, Resets Try Later, Internal Fault, Writing to, Memos, Flue Temp, Shutdown

Page 50

Service Manual

3 Troubleshooting

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

FAULT

DESCRIPTION

CORRECTIVE ACTION

 

 

 

 

 

 

Too Many

Too many manual resets have occurred

• Wait 15 minutes and try again.

 

 

• Turn power off to unit, wait 30 seconds and then turn

Resets - Try Later

during a 15 minute period.

 

 

power back on.

 

 

 

 

 

 

 

 

Internal Fault

The main control board has detected an

• Replace the main control board.

 

 

internal fault.

 

 

 

 

 

 

 

 

 

 

Writing to

The main control board has detected an

• Replace the main control board.

 

 

Memos

internal fault.

 

 

 

 

 

 

 

 

 

 

• Inspect the heat exchanger. Reference page 35 of

 

 

this manual for the procedure on how to clean the

 

 

flue side of the heat exchanger.

 

 

Flue Temp

 

• Inspect the flue sensor and associated wiring.

The stack temperature has exceeded the

Measure

the resistance of

the flue

sensor and

Shutdown

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

set parameters for the boiler.

 

Replace the sensor if necessary.

 

 

 

 

 

 

 

 

• Verify that the vent/air intake pipes are properly

 

 

installed and that there are no obstructions.

 

 

 

• Replace the main control board.

 

 

 

 

 

 

 

• 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 voltage to the boiler pump motor on a call

Delta T

The temperature rise across the heat

for heat. If voltage is not present, check the wiring

back to the pump relay. Replace the pump relay if

Shutdown

exchanger has exceeded the set parameters

necessary.

 

 

 

 

for the boiler.

 

 

 

 

• 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 pump is the proper size. Reference

 

 

Section 5 - Hydronic Piping of the Crest

 

 

Installation and Operation

Manual

for

boiler

 

 

pump specifications.

 

 

 

 

 

 

 

 

 

 

50

Page 49 Page 51
Image 50
Page 49 Page 51
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 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 Set Points Initial SetupViewable and changeable control parameters 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 OpenIgnition Anti-cyclingFlame Failure Running Flame Out SequenceFlame Out 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 SensorDifferential TemperatureBurner Supply 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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