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RECYCLING AND DISPOSAL
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APPENDIX
APPENDIX
APPENDIX E - TROUBLESHOOTING TABLE
LOCKOUT CODES
Error no. Error Description Checks Solutions
0 E2PROM_READ_ERROR Internal software error Control board replacement
1 IGNIT_ERROR Three unsuccessful ignition attempts in
a row
a- Check gas supply pressure;
b- Check ignition spark;
c- Correct amount of air;
d-Check for120VAC at the gas valve.
a- If th
e gas supply pressure 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 eliminate any obstructions;
d- If the voltage to the gas valve is
not 120Vac the power 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 wir
es are damaged, replace
them
b- If wires are ok, replace the gas
valve or the power control board.
3 SAFETY_RELAY_ERROR Internal control board error Control board replacement
4 BLOCKING_TOO_LONG Control had a blocking error for more
than 20 hours.
This error is caused when any Blocking
errors occur and are not corrected auto-
matically.
Pr
ess RESET button to
display the Blocking error
description
Remove the cause of the Blocking
error
5 FAN_ERROR_NOT_RUNNING Fan is not running after 60 seconds. a- Check for 120 VAC power con-
nection 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 present, re-
place 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 Control board replacement
9 WRONG_EEPROM_SIGNATURE Contents of E2PROM are not up to date Control board replacement
10 E2PROM_ERROR Wrong safety parameters in E2PROM Control board replacement
11 STATE_ERROR Internal software error Control board replacement
12 ROM_ERROR Internal software error Control board replacement
13 APS_NOT_OPEN Air pressure switch not working
14 APS_NOT_CLOSED Air pressure switch not working
15 MAX_TEMP_ERROR The external overheat protection is en
-
abled or the High limit sensor measures a
temper
ature of over 95°C (203°F))
a- Check the pump to verify the
ow circulation;
b- Check if the valves on hydraulic
circuit are open;
c- Check the high limit switch.
a- Change the pump or restart it;
b- Open the valves on hydraulic
circuit;
c- Change the high limit switch.
17 STACK_ERROR Internal software error Control board replacement
18 INSTRUCTION_ERROR Internal software error Control board replacement
19 ION_CHECK_FAILED Internal software error Control board replacement
20 FLAME_OUT_TOO_LATE Flame still present 10 seconds after clos-
ing the gas valve
Replace the gas valve
21 FLAME_BEFORE_IGNIT Flame is detected before ignition Replace the gas valve
22 TOO_MANY_FLAME_LOSS Three ame failures during one demand
cycle
a- Check the integrity of the wire
connections of the spark and the
earth on heat exchanger
b- check ionization signal while
runn
ing
a- If wires are damaged, replace
them
b- check for proper combustion
settings - if correct replace spark/
amerod.
23 CORRUPTED_ERROR_NR Error code RAM byte was corrupted to an
unknown error code