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TROUBLESHOOTING ERROR CODES
ERROR CODE
33 :
TEG temperature sensor read error
34 :
Combustion temperature sensor read error
Limit switch alarm. The temperature is too high and has
35 :
triggered the limit switch.
36 :
Thermostat offline
Flameout after ignition. After the ignition is successful,
the temperature continues to drop. After dropping
37 :
below the default specified temperature of 600 °C, an
alarm occurs. Wait for the temperature to fall below 300
°C to start re-ignition.
Ignition failure warning. Appears after 3 consecutive
38 :
ignition failures.
39 :
TEG temperature is too high.
47 :
Controller low battery warning.
ROOT CAUSE
SOLUTION
Check if the TEG temperature sensor is installed
correctly. If so, replace the temperature sensor.
Check if the Combustion temperature sensor
is installed correctly. If so, replace the
temperature sensor.
Check if the limit switch is installed correctly, and
make sure the system is not overheating. If so, replace
the limit switch.
Check if the Thermostat RJ45 (CAT-6) cable is
connected properly. If so, replace the cable.
The furnace will automatically rectify this in the
next run. If not, replace the combustion
temperature sensor.
Make sure there's gas supply. Check if the igniter
lights up, through the observation window. If not,
replace the igniter.
Check if the TEG temperature sensor is installed
correctly, and make sure the system is not
overheating. If so, replace the sensor.
Plug in the external power supply (if applicable) to
the Controller, to recharge the battery. If it still doesn't
charge, replace the battery.
CARMEL
TM
AC2030TNA TOP VENT GAS WALL HEATER
37
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