Rheem TRITON GHE80SS Service Training Manual page 36

Rheem TRITON TM
Service Manual
TROUBLESHOOTING ERROR CODES
• If continuity is present, cycle power back on and clear
alarm code. If switch opens (loses continuity) with blower
running, then switch is operating normally and there is
something causing vent restriction.
• Remove the air intake pipe from the rubber fernco connec-
tor at blower, if unit will fire with venting removed then issue
is in venting.
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, not damaged, and clear of debris.
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 pres-
sure 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 con-
nected and not damaged.
• Confirm the rubber cap (if has second port) 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
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 con-
nected and not damaged.
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• If error persists with intake removed from blower, verify no
debris in blower housing. If no debris found and switch
still opens with intake venting removed, replace the intake
pressure switch.
• Confirm the rubber cap (if has second port) 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.
• Check barb in collar is clear of debris and is not damaged.
You can clear this error code by pressing clear button on the cur-
rent alarm screen. If problem persists , replace the PoF pressure
switch.
• 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 per-
sists, a board replacement may be required.
• Confirm the rubber cap (if has second port) 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 cur-
rent alarm screen. If problem persists , replace the PoF pressure
switch.