Diagnostic Error Codes - Slant/Fin LYNX LX-85A Installation And Operating Instructions Manual

National Excelsior Company
www.excelsiorhvac.com
38
VI. DIAGNOSTIC ERROR CODES
WARNING: Only a trained, experienced service technician should
perform troubleshooting. Turn off all electric power to the boiler
before service.
A. LOCKOUT ERRORS: Indicated by an "A" in the mode display. The reset button must be pressed to clear the error
and retry operation. The temperature display shows the error code.
ERROR CODE
01
02
03
04, 05, 09, 10,
12, 13, 14, 15,
16, 18, 32
19, 20
33
INDICATION
Ignition Failure - 3 unsuccessful
ignition attempts in a row.
Flame Failure - 3 losses of flame
signal during one demand.
Water High Limit Open
Control Failure
Flame Detected at Wrong Time
Fan Failure - RPM error
Subject to change without notice.
REMEDY
Check for steady sparking at electrodes. If spark not
steady - check spark gap to be .125", clean or replace
spark ignitor, check power supply voltage and grounding.
If spark is steady - check for proper gas supply pressure.
Check combustion, if able to ignite, or replace gas valve.
Check for proper combustion, at both max. and min.
input firing rates. If combustion is within the range
specified in Table 6 on page 36, clean or replace spark
ignitor, check power supply voltage and grounding.
Check to see if the water outlet temperature reaches
203˚F. If it does, replace the water outlet 12k ohm
sensor. If it does not, replace the water high limit switch.
Replace control board. Make sure the proper boiler
model selection and confirmation code is entered.
See Table 5 on page 32.
If a flame is still observed after a call for heat is stopped,
replace the gas valve. If the burner seems to be shutting
down properly, replace the spark ignitor.
Check wire harness connections going to the blower.
Replace blower.