Lochinvar 000 - 2, 495, 065 Operation And Diagnostic Lights, TABLE - O Status LED Diagnostic Codes

Installation and Service Manual

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 left end of the unit.

TABLE - O

Status LED Diagnostic Codes

Code Sequence Condition

Constant ON System OK, no faults present. Constant OFF Possible control fault, check power;

LED may be effective, do not replace control if all operational sequences function properly, see Trouble Shooting Guide.

One Flash Low Air, check air pressure switch and hoses to pressure sensing points, fan, venting and sealing of pressurized chamber. Note:Brief flashing normal on fan start-up/proving.

Two Flashes Flame without call for heat, check for a gas valve stuck in the open position, air, venting, burners and the combustion process. Fan will remain on.

Three Flashes Lockout due to flame failure, push reset button on inner control panel after correcting ignition problem. Initial heater start up without properly bleeding air from the gas line may require multiple reset functions to achieve proper ignition.

Four Flashes Igniter failure, igniter will not maintain minimum 2.75 amp current draw, caused by, low voltage, bad wiring/continuity, high resistance or igniter failure.

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

Six Flashes Replace ignition module, internal fault.TA

TABLE - P

Status LED Diagnostic Codes

Code
Sequence	Condition Lights
Prepurge	Operation of combustion
	air fan before ignition on
	stages 1 and 2.
Trial for Ignition	Hot surface igniter
	preparing to light burners.
Stage 1 On	Burners for stage 1 operating.
Stage 2 On	Burners for stage 2 operating.
(985,000 - 2,065,000 Btu/hr)
Status	Remote status light for
	ignition module.
Alarm	Indicates flame failure on
	the ignition module and
	will indicate additional

alarms if the alarm of any failure option is purchased.

Models 495,000 - 745,000 Btu/hr

Models 985,000 - 2,065,000 Btu/hr

Figure 40 - Operation/Diagnostic Lights

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