Lochinvar 3.5, 1.5, 2.5 service manual Anti-cycling, Flame Failure, Ignition

Page 41

Service Manual

3 Troubleshooting (continued)

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

FAULT

DESCRIPTION

CORRECTIVE ACTION

 

 

 

 

The main control board has received a call

• The control board will release the call for heat after a

Anti-cycling

for heat too quickly after the previous call for

set time period.

heat has ended.

• The control board will release the call for heat if the

 

 

outlet temperature drops too quickly.

 

 

 

 

The unit has failed to prove main burner

• Inspect spark electrode and associated wiring for

 

ignition. It will require a manual reset before

damage and connection. Reference page 34 of this

 

attempting to fire again.

manual for removal and cleaning procedures.

 

 

Replace if necessary.

 

 

• Visually check for presence of a spark from the view

 

 

port.

 

 

• Check for proper electrical grounding of the unit.

 

 

• Check incoming supply gas pressure. Natural and

 

 

LP gas pressures should be between 4 - 14 inches w.c.

 

 

(1.0 - 3.5 kPa). Refer to Section 6 - Gas Connections

 

 

of the Crest Installation and Operation Manual for

 

 

detailed information concerning the gas supply.

 

 

• Verify that the plastic hose from gas valve 1 to the air

 

 

inlet is connected and is not damaged.

 

 

• Verify that the vent/air intake pipes are correctly

Flame Failure

 

installed and that there are no obstructions.

 

 

Ignition

 

• If 120 vac is present at the main control board, check

(will require a manual

 

 

the wiring between the main control board and the gas

reset once the condition

 

valve. Replace the wiring if necessary. Do not

has been corrected.

 

disconnect the wiring from the gas valve and attempt to

Press the RESET button

 

measure voltage at that point. The main control board

on the SMART TOUCH

 

can detect if the gas valve is not connected and will

display to reset.)

 

display the Gas Valve / Connection fault.

 

 

• If 120 vac is present, check the outlet of the valve to

 

 

ensure the valve is flowing gas. With a manometer

 

 

connected to the outlet tap of the gas valve, when the

 

 

unit is in the prepurge period, there should be a

 

 

negative pressure present. When the valve is

 

 

energized a change in pressure should occur. If the

 

 

pressure change does not occur, the gas valve is not

 

 

opening. Replace the gas valve.

 

 

• Inspect flame sensor and associated wiring.

 

 

Reference page 34 of this manual for removal and

 

 

cleaning procedures. Replace if necessary.

 

 

• Inspect the burner. Reference page 34 of this manual

 

 

for removal and cleaning procedures. Replace if

 

 

necessary.

 

 

 

41

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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 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 Set Points Initial SetupViewable and changeable control parameters 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 WaterIgnition Anti-cyclingFlame Failure Running Flame Out SequenceFlame Out 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 SensorDifferential TemperatureBurner Supply 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.
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