Operation And Diagnostic Lights - Lochinvar Copper-Fin 497 User's Information Manual

4
Ignition module

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.
TABLE 4A
Status LED Diagnostic Codes
Code
Sequence
Constant
System OK, no faults present.
ON
Possible control fault, check power; LED
Constant may be effective, do not replace control if all
OFF
operational sequences function properly, see
Trouble- Shooting Guide.
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 inner control panel after correcting ignition
Three problem. Initial heater start up without
Flashes
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.
Power supply problem, check for low supply
Five
voltage or transformer output less than
Flashes
18VAC.
Six
Replace ignition module, internal fault.
Flashes
10
Condition
User's Information Manual
TABLE 4B
Status LED Diagnostic Codes
Code
Sequence
Operation for combustion air fan beofre igntion
Prepurge
on stages 1 and 2.
Trial for
Hot surface igniter preparing to light burners.
Ignition
Stage 1 ON Burners for stage 1 operating.
Burners for stage 2 operating.
Stage 2 ON
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 4-2_Operation / diagnostic lights
Condition Lights