Lochinvar 1.3 service manual Troubleshooting

Page 49

 

 

 

 

 

 

 

Service Manual

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3 Troubleshooting (continued)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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

 

 

 

 

 

 

 

 

 

 

FAULT

DESCRIPTION

 

CORRECTIVE ACTION

 

 

 

 

 

 

 

 

 

 

 

• If 24 VAC is present at the main control board, check

 

 

 

 

the wiring between the main control board and the gas

 

 

 

 

valve. Replace the wiring if necessary. Do not

 

 

 

 

disconnect the wiring from the gas valve and attempt

 

 

 

 

to measure voltage at that point. The main control

 

 

 

 

board can detect if the gas valve is not connected and

 

Flame Lost

 

 

will display the Gas Valve / Connection fault.

 

 

 

 

 

• If 24 VAC is present, check the outlet of the valve to

 

While Running

 

 

 

 

 

ensure the valve is flowing gas. With a manometer

 

(cont’d)

The unit was running and lost the flame

 

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

 

(will require a

 

signal. This condition occurred twice .

unit is in

the prepurge

period, there

should be

a

 

manual reset once the

 

 

 

negative

pressure present.

When

the

valve

is

 

condition has been

 

 

 

 

 

energized a change in pressure should occur. If the

 

corrected. Press the

 

 

 

 

 

pressure change does not occur, the gas valve is not

 

RESET button on the

 

 

 

 

 

opening. Replace the gas valve.

 

 

 

 

 

display to reset.)

 

 

 

 

 

 

 

 

 

• Inspect flame sensor and associated wiring.

 

 

 

 

 

 

 

 

Reference page 39 of this manual for removal and

 

 

 

 

cleaning procedures. Replace if necessary.

 

 

 

 

 

 

• Inspect the burner. Reference page 39 of this manual

 

 

 

 

for removal and cleaning procedures. Replace if

 

 

 

 

necessary.

 

 

 

 

 

 

 

 

 

 

• 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 6 - Hydronic Piping of the

 

 

 

 

SYNC

Installation

and

Operation

Manual

 

 

 

 

for the proper piping methods for the SYNC.

 

 

 

 

 

 

• Check voltage to boiler pump motor on a call for

 

Manual Reset

 

 

heat. If voltage is not present, check wiring back to

 

 

 

the pump relay.

 

 

 

 

 

 

 

High Limit

 

 

• Replace the pump relay if necessary.

 

 

 

 

 

(will require a

 

 

 

 

 

 

 

 

 

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

 

manual reset once the

The outlet water temperature has exceeded

 

condition has been

the setting of the high limit.

pump is not operating, replace the pump.

 

 

 

corrected. Press the

• If the system pump is a variable speed pump, ensure

 

 

 

 

RESET button on the

 

 

that the system flow is not less than the boiler flow.

 

 

display to reset.)

 

 

• If operating on either an inlet or system supply

 

 

 

 

 

 

 

 

sensor, check temperature setting of the main control

 

 

 

 

board.

 

 

 

 

 

 

 

 

 

 

 

• If the high limit has tripped, check setting of the

 

 

 

 

device.

 

 

 

 

 

 

 

 

 

 

 

• Check resistance of water sensors and compare to

 

 

 

 

Table 3B on page 45 of this manual. Replace sensor

 

 

 

 

if necessary.

 

 

 

 

 

 

 

 

 

 

• Replace high limit.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

49

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Image 49
Contents Models 1.0, 1.3, Contents Niosh stated First Aid Handling ceramic fiber materialsMaintenance ServiceTroubleshooting Near boiler piping ServiceSync display Board Control inputsControl outputs Secondary Smart Touch Control Module PrimaryHow the boiler operates General OperationHow the control module operates Sequence of operationSequence of operation space heating and HW Sequence of operationParameter table This table lists the parameters and where to access themOutdoor Reset Status Screen Viewable and changeable control parametersService Details Screen Service Main Screen Setup Screen Service/Setup Parameters Screen Service Set Point Parameters Screen Outdoor Reset Parameters Screen Service Night Setback Parameters Screen Cascade Operation Cascade Parameters ScreenPumps Parameters Screen 10Vdc Operation 10Vdc BMS Parameters ScreenService Cascade Screen Service Temps Screen Burners Screen Graph Select Screen History Screen Service Mode Screen Maintenance Maintenance and annual startup Clean condensate trap Address reported problemsInspect boiler area Inspect boiler interiorCheck water system Flue vent system and air pipingCheck expansion tank Check boiler relief valve Check all boiler wiring Check ignition ground wiringCheck control settings Inspect ignition and flame sense electrodesCleaning boiler heat exchanger Check flame signalReview with owner Test low water flow conditions Test procedureAlarm Screen TroubleshootingCheck the following Before troubleshootingCheck control module fuses No Burner No DisplayOperation Unit DoesTemperature Resistance Checking temperature sensorsNo Pump NoisyOperation Boiler Pump System PumpCondensate Flow SwitchDrain Blocked Flame outFlame Lost Light cont’dWhile Running Troubleshooting High Limit / HEX Automatic ResetTemp SW Blower RPM’sToo High Louver Proving SwitchSensor Open Sensor ShortedAir Flow Too Resets Try LaterLow Flap ValveNo Error Stored Internal FaultWriting to MemosGas Valve Adjustment Combustion Analysis ProcedureOr Obstruction Gas Supply PressureModel Gas valve adjustment procedureModels 1.3
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1.3, 1 specifications

Lochinvar 1 is a remarkable achievement in the realm of modern technology and engineering. As a powerful and efficient water heater, it has been designed to cater to a wide range of residential and commercial needs. One of the standout features of Lochinvar 1 is its advanced heating technology, which incorporates a high-efficiency condensing design. This technology allows the unit to achieve impressive energy savings by maximizing heat transfer while minimizing energy consumption.

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