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The SureLight board is equipped with two LED lights for troubleshooting. The diagnostic codes are listed below in table 8.
TABLE 8
DIAGNOSTIC CODES
Make sure to Identify LED’S Correctl..
LED #1
56L83, 97L48 −DIAG1 Green
69M15 − DS1 Red
LED #2
56L83, 97L48 − DIAG2 Green
69M15 − DS2 Green
DESCRIPTION
SIMULTANEOUS
SLOW FLASH
SIMULTANEOUS
SLOW FLASH
Power on − Normal operation.
Also signaled during cooling and continuous fan.
SIMULTANEOUS
FAST FLASH
SIMULTANEOUS
FAST FLASH
Normal operation − signaled when heating demand initiated at thermostat.
SLOW FLASH ON
Primary or secondary limit switch open. Limit must close within 3 minutes or
unit goes into 1 hour Watchgurad.
OFF SLOW FLASH
Prove switch open.
OR: Blocked inlet/exhaust vent;
OR: Prove switch closed prior to activation of combustion air inducer.
ALTERNATING
SLOW FLASH
ALTERNATING
SLOW FLASH
Watchguard −− burners failed to ignite.
SLOW FLASH OFF Flame sensed without gas valve energized.
ON SLOW FLASH Rollout switch open. OR: 9-pin connector improperly attached.
ON ON
ON OFF
Circuit board failure or control wired incorrectly.
OFF ON
FAST FLASH SLOW FLASH Main power polarity reversed. Switch line and neutral.
SLOW FLASH FAST FLASH
Low flame signal. Measures below:
See table 16
Replace flame sense rod.
ALTERNATING
FAST FLASH
ALTERNATING
FAST FLASH
The following conditions are sensed during the ignitor warm−up period only:
1) Improper main ground;
2) Broken ignitor; OR: Open ignitor circuit;
3) Line voltage below 75 volts.
(If voltage lower than 75 volts prior to ignitor warm-up, control will signal
waiting on call from thermostat, and will not respond.
NOTE − Slow flash rate equals 1 Hz (one flash per second). Fast flash rate equals 3 Hz (three flashes per second).
FIGURE 9
SureLight Control Ignition Sequence Board 56L83, 97L48 & 69M15
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