Rheem TRITON GHE80SS Service Training Manual page 37

TROUBLESHOOTING ERROR CODES
Error A007 Exhaust Pressure Switch Open
The exhaust pressure switch is a normally closed switch. It will only open in the event of excess pressure in the exhaust venting. Check the
following:
• 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.
• With the unit off, check continuity on the pressure switch. If
no continuity present, replace the exhaust pressure switch.
Error A008 PoF/Blower Mismatch
The Proof of Fan pressure switch is closed when the blower is
off. Check the following to see if the problem can be resolved.
• If the blower is running while, the alarm is present, follow
troubleshooting for error A025.
• If the blower is not running, check to ensure the PoF switch
has not been jumped. If not, check continuity to the switch.
It should be open when the blower is off. If the switch is
reading closed (has continuity) with the blower not running,
replace the PoF switch.
Error A010 End Of Line Test Failure
This error should never present on a unit in the field. If this error
should occur, replace the ignition control board.
Error A016 Energy Cut Off Switch Is Open
The tank temperature has exceeded the allowable temperature.
• Confirm water in unit is not above 200°F.
• Inspect wiring and connections on both
the upper temperature probe and control.
If wiring is properly connected, try to clear
alarm through display.
• If alarm does not clear, cycle power off,
and check the ECO using a multi-meter.
Disconnect wiring from ECO/Temp probe.
Check for continuity across pins 3 & 4 of
the probe. If no continuity found, replace
ECO/Temp probe.
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• Check exhaust vent for clogs and remove if present.
• Check for condensate backing up into exhaust tee.
You can clear this error code by pressing clear button on the cur-
rent alarm screen. If problem persists a part replacement may be
required.
• Clear the alarm and see if the A008 returns. If A008 returns
and the pressure switch is reading open (no continuity),
replace the ignition control board.
• If continuity is present through probe,
reconnect wiring to ECO/Temp probe. Dis-
connect the P2 harness from the control
board and check for continuity across the
two orange wires. If no continuity is pres-
ent through wiring, replace the wiring har-
ness. If continuity is present through both
the probe and wiring. Replace the control
board.
• Replace ECO/Temp probe ONLY if it is
OPEN but the display is reading a tank
temperature of less than 200°F.
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