John Wood Power Direct Vent (ENERGY STAR) - Manual (Page 24)

WARNING
Scald burns occur in under one second with
71°C (160°F) water, which this thermostat
will deliver if the temperature is set at “VERY
HOT”. Lower settings of the temperature will
reduce the risk of scald and will reduce your
fuel bill.
Note: All the temperature indicators will be off during normal
operation. If any time you see the indicators on, there may be
a system error and you should consult the “Troubleshooting
Guide” section of this document, or contact a trained service
professional.
There is a hot-water scald potential if the thermostat is set
too high. In households with children, disabled or the elderly,
select a lower temperature setting. Valves for reducing
point-of-use temperature by mixing hot and cold water are
available. Consult a licensed plumber or the local plumbing
authority.
Heater Shutdown
1. Turn off all electrical power to the heater or unplug the
power cord from the receptacle.
2. Turn the manual gas supply valve to the water heater to
the “OFF” position.
System Error Codes
The computer inside the gas control monitors the ignition
sequence, temperature settings and overall operation of the
heater. If any of these parameters does not operate properly
the computer will shut down the water heater and flash an
error code. See the “Intelli-Vent
TM System Error Codes” and
“Troubleshooting Guide” to diagnose the problem before
attempting corrective action. See also “Resettable Lockout”.
Intelli-Vent TM System Error Codes
SYMPTOM POSSIBLE CAUSE(S) CORRECTIVE ACTION
Error 1
An open earth ground circuit
to the ignition system. 1. Check that the earth ground conductor is properly connected at
the fuse box or breaker panel and the water heater.
2. Check that the grounding conductors on the water heater are
properly connected and secure.
Error 2
The self diagnostic test
detected a wiring error,
reversed polarity or a high
resistance to earth ground. 1. Check for proper connection of the line neutral and line hot wires.
2. Check that the appliance is securely connected to earth ground.
Error 3
The pressure switch
remained closed longer than
5 seconds after the call for
heat began. Blower does not
start. 1. The pressure switch wiring is incorrect.
2. The pressure switch is defective and must be replaced.
Error 4
The pressure switch
remained open longer than 5
seconds after the combustion
blower was energized. 1. The pressure switch wiring is incorrect.
2. The pressure switch tubing is not connected correctly.
3. Obstructions or restrictions in the water heater air intake or
exhaust flue.
4. Check the high temperature limit switch.
Error 5
The self diagnostic test has
detected an error in the
hotsurface igniter circuit. 1. Check that all wiring is correct and secure.
2. Disconnect the igniter connector and measure the igniter
resistance with an accurate ohmmeter between pins 1 and 2.
Resistance should be between 11.5 and 18.8 ohms. If the reading
is incorrect, replace the hot-surface igniter.
3. If the above checks are good, replace the control.
Error 6
The maximum number of
ignition retries or recycles
has been reached and the
system is in lockout for an
hour. Cycle the power to the
water heater off and on to
reset. 1. Ensure the igniter is positioned correctly.
2. Ensure the voltage to the water heater is 115-125 VAC.
3. Clear any obstructions or restrictions in the water heater air intake
or exhaust flue.
Table 5. Intelli-Vent TM System Error Codes.
– 24 –