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Triton Service Manual SVC1020T ; Rev 4
80 and 100 gallon chassis
Error A004 PoF Open During Heating
The Proof of Fan pressure switch is open during heating. You can clear this error code by pressing clear button on the
current alarm screen. If problem persists a part replacement may be required.
Check the following to see if the problem can be resolved.
• Check wiring to the pressure switch to ensure no wires have been broken, damaged or disconnected.
• Confirm tubing from switch to the blower mounting flange is properly connected and not damaged.
• Confirm the rubber cap is covering the test port on the top of the pressure switch, if the cap is missing it will allow
air pressure to escape and could result in alarm to occur.
• Check air intake for blockages and remove blockage if present.
You can clear this error code by pressing clear button on the current alarm screen. If problem persists , replace the
PoF pressure switch.
Error A005 PoF Open During Pre-Purge
The Proof of Fan pressure switch is open during purge. The PoF switch is a normally open switch that closes
from positive pressure from the blower.
• Check wiring to the switch to ensure no wires have been broken, damaged or disconnected.
• Confirm tubing from switch to the air intake is properly connected and not damaged.
• Confirm the rubber cap is covering the test port on top of the pressure switch, if the cap is missing it will allow
air pressure to escape and could result in alarm to occur.
• Check air intake for blockages and remove blockage if present
• Remove air intake from blower, confirm no debris has been sucked into the blower housing.
• Clear the alarm and confirm blower is running when display status shows “Pre-Purge”. If blower is not running
during “Pre-Purge”, replace the blower.
• Check continuity to see if switch is open while the blower is running. If switch does not have continuity while the
blower is running then, replace PoF pressure switch.
• If switch has continuity while fan is running but alarm persists, a board replacement may be required.
Error A006 PoF Open During Post Purge
The Proof of Fan pressure switch is open during purge. Check the following to see if the problem can be
resolved.
• Check wiring to the switch to ensure no wires have been broken, damaged or disconnected.
• Confirm tubing from switch to the air intake is properly connected and not damaged.
• Confirm the rubber cap is covering the test port on the top of the pressure switch, if the cap is missing it will
allow air pressure to escape and could result in alarm to occur.
• Check air intake for blockages and remove blockage if present.
You can clear this error code by pressing clear button on the current alarm screen. If problem persists , replace the
PoF pressure switch.
Troubleshooting Error Codes
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