5 Electrical connections

Operation and diagnostic lights

The diagnostic control panel has up to 6 indicating and diagnostic lights to show all major steps of operation and control sensed malfunctions. This panel is located on the front of the unit.

Installation & Service Manual

TABLE 5E

Status LED Diagnostic Codes

Code

Condition Lights

Sequence

TABLE 5D

Status LED Diagnostic Codes

Code

Condition

Prepurge

Trial for

Operation for combustion air fan before ignition on stages 1 and 2.

Sequence

Constant

Ignition

Hot surface igniter preparing to light burners.

ON

System OK, no faults present.

Stage 1 ON Burners for stage 1 operating.

Possible control fault, check power; LED may Constant be defective, do not replace control if all

OFF operational sequences function properly, see Trouble- Shooting Guide.

Stage 2 ON

Burners for stage 2 operating.

Low Air, check air pressure switch and hoses

One to pressure sensing points, fan, venting and

Flash sealing of pressurized chamber. Note: Brief flashing normal on fan start-up proving.

Flame without call for heat, check for a gas

Two valve stuck in the open position, air, venting, Flashes burners and the combustion process. Fan will

remain on.

Lockout due to flame failure, push reset button on the diagnostic panel after correcting

Three ignition problem. Initial heater start up Flashes without properly bleeding air from the gas line may require multiple reset functions to

achieve proper ignition.

Igniter failure, igniter will not maintain a

Four minimum 2.75 amp current draw, caused Flashes by low voltage, bad wiring/continuity, high

resistance or igniter failure.

Five Power supply problem, check for low supply Flashes voltage or transformer output less than 18VAC.

Six

Replace ignition module, internal fault.

Flashes

Status Remote status light for ignition module.

Indicates flame failure on the ignition module

Alarm and will indicate additional alarms if the alarm

of any failure option is purchased.

Figure 5-13_Operation / diagnostic lights

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Lochinvar 497 - 2067 service manual Operation and diagnostic lights, Sequence Constant Ignition, Stage 2 on, Six, Flashes
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497 - 2067 specifications

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In terms of safety, the Lochinvar 497 - 2067 incorporates several cutting-edge safety features, including a flame detection system and multiple safety shut-off devices. These safeguards help to ensure the safe operation of the boiler, providing peace of mind to users and heating professionals alike.

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