23
TROUBLESHOOTING GUIDE
CONDITION (code#)
CAUSE
REMEDY
1
An open earth ground
circuit to the ignition.
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.
2
A wiring error or a high
resistance to earth ground.
1) Check for proper connection of the line neutral and line hot wires.
2) Check that the water heater is securely connected to earth ground.
3
The pressure switch remained
closed longer than 5 seconds
after the call for heat began.
1) The pressure switch wiring is incorrect.
2) The pressure switch is defective and must be replaced.
4
The exhaust pressure switch
remained open longer than 5
seconds (or the inlet pressure
switch opened) after the power
venter was energized.
1) The pressure switch wiring is incorrect.
2) The pressure switch tubings are not properly connected.
3) There are obstructions or restrictions in the water heater air intake or exhaust
flue.
5
The self diagnostic test has
detected an error in the
hot surface ignitor circuit.
1) Check the wiring is correct and secure.
2) Disconnect the ignitor connector and measure the ignitor 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 ignitor.
3) If the above checks are good, replace the gas control valve.
6
The maximum number of igni-
tion
retries or recycles has been
reached and the system is in
lock-out mode.
1) Check if the gas supply is off or too low to operate.
2) Check the flame sensor rod to see that it is properly located and free from con-
tamination. Reposition the flame sensor rod or lightly clean it with an abrasive
cloth.
3) The hot surface ignitor may not be properly positioned. Reposition as necessary.
4) Check that the hot surface ignitor and flame sensor rod are properly wired and in
good working condition.
5) Low voltage to the water heater. Check and repair.
7
The gas valve driver circuit.
1) Turn off the power to the water heater for 10 seconds and then back on.
2) If the above step did not clear the error, replace the gas control valve.
8
The internal microcomputer.
1) Turn off the power to the water heater for 10 seconds and then back on.
2) If the above step did not clear the error, replace the gas control valve.
9
The internal circuit.
1) Turn off the power to the water heater for 10 seconds and then back on
2) If the above step did not clear the error, replace the gas control valve.
10
Flame signal sensed out of
proper sequence.
Replace the gas control valve.
11
The high temperature thermal
cut-off is open.
Replace the gas control valve.
12
One of the temperature adjust
buttons is stuck closed.
1) Make sure that there are no objects leaning against the front of the control.
2) Lightly press and release each of the buttons once.
3) If the above actions do not clear the error, the control will continue to regulate
the water temperature at the last setting, but you will not be able to change set-
tings unless you replace the gas control valve.
13
The water temperature sensor
is either open or short-circuited.
1) Check that all of the wiring is correct and that there are no open or short circuits.
2) If no wiring problems are found, the gas control valve must be replaced.
14
The self-diagnostic test found
a problem with the flammable
vapour sensor.
1) Check that all wiring is correct and that there are no open or short circuits.
2) If no wiring problems are found, the Flammable vapour sensor must be replaced.
15
The control detected the pres-
ence of flammable vapours near
the appliance and entered the
lock-out mode.
1) Identify the source of the flammable vapours and remove it from the area sur-
rounding the water heater.
2) Contact a qualified service technician or the gas supplier to have the water heater
inspected immediately.
WARNING
Disconnect the electrical power before servicing the water heater. Service should only be performed by a
qualified service technician. Failure to follow these instructions can result in personal injury and/or death.
