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APPENDIX
APPENDIX
APPENDIX J - TROUBLESHOOTING TABLE
LOCKOUT CODES
Error no. Error Description Checks Solutions
0 E2PROM_READ_ERROR Internal software error Replace the power control
board
1 IGNIT_ERROR Three unsuccessful ignition
attempts in a row
a- Check gas supply pres-
sure;
b- Check ignition spark;
c- Correct amount of air;
d-Check for120VAC at the gas
valve.
a- If the gas supply pres-
sure is incorrect, it must
be adjusted to the correct
pressure;
b- If spark is not present
check for correct ignition
electrode position;
c- If the combustion air
pressure is incorrect, inspect
the vent system and elimi-
nate any obstructions;
d- If the voltage to the gas
valve is not 120Vac the pow-
er control board must be
replaced.
2 GV_RELAY_ERROR Failure detected in the GV
(Gas Valve) relay
a- Check the integrity of the
wire connections between
gas valve and control board.
a- If wires are damaged,
replace them
b- If wires are ok, replace
the gas
valve or the power control
board.
3 SAFETY_RELAY_ERROR Failure detected in the Safe-
ty relay
Replace the power control
board
4 BLOCKING_TOO_LONG Control had a blocking error
for more than 20 hours
Press RESET button to
display the Blocking error
description
Remove the cause of the
Blocking
error
5 FAN_ERROR_NOT_RUNNING Fan is not running for more
than 60 seconds
a- Check for 120 Vac power
connection of the fan.
b- Check PWM connection of
the fan.
a- If no 120 VAC voltage is
present, replace the power
control board;
b- If no PWM signal is pres-
ent, replace power control
board;
c- Replace the fan.
6 FAN_ERROR_TOO_SLOW Fan runs too slow for more
than 60 seconds
7 FAN_ERROR_TOO_FAST Fan runs too fast for more
than 60 seconds
8 RAM_ERROR Internal software error Replace the power control
board
9 WRONG_EEPROM_SIGNATURE Contents of E2PROM is not up
to date
Replace the power control
board
10 E2PROM_ERROR Wrong safety parameters in
E2PROM
Replace the power control
board
11 STATE_ERROR Internal software error Replace the power control
board
12 ROM_ERROR Internal software error Replace the power control
board
13 APS_NOT_OPEN Air pressure switch not
working
14 APS_NOT_CLOSED Air pressure switch not
working
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