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Triton Service Manual SVC1020T ; Rev 4
80 and 100 gallon chassis
Troubleshooting Error Codes
Error A018 Flue Temp Sensor Open
This alarm means the control is sensing the flu temperature sensor as being open or disconnect.
• Refer to A017 for troubleshooting.
Error A019 Flue Temp Sensor Shorted
This alarm means the control board is sensing a short in the flue temperature sensor or wiring harness.
• Refer to A017 for troubleshooting
Error A022 Upper Tank Sensor is Open
This error code means the water temperature probe is not connected or the
water temperature thermistor is damaged. Things to check:
• Make sure the Molex connector to the ECO/temperature probe is connected,
harness is properly oriented so locking tab on Molex locks into ECO/temp
probe, and wires are secure.
• Make sure the Molex at location P2 on the ignition control board is securely
connected and oriented so the locking tab on the Molex locks onto the connector
on the control board. Confirm all wires are secure in the harness, and the pins on
the control board are not bent/broken.
• Disconnect wiring from the ECO/Temperature probe. Check the ohms reading
across pins 1 & 2, as shown in the photo to the right, and compare to the chart
below. The resistance should show about what the water temperature is inside
the tank. Replace the temp probe if the circuit is open or the resistance value
does not represent the water temperature in the tank.
• If ECO/Temp probe reading is correct, reconnect wiring to ECO/Temp probe.
Disconnect the P2 wiring harness from the control board and measure the ohms
reading across the blue wires in the harness. You should get about the same
ohms reading as you had on the probe. If the reading is not close or circuit reads
open, replace the wiring harness.
• If all readings are correct at probe and harness, replace the ignition control
board.
Temp
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