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TROUBLESHOOTING
Check/Reset Energy Cut Off
5
ECO Button.
1
Reset Button
FIgure 30 - Energy Cut Off (ECO) button
The Energy Cut Off (ECO) shuts off
power to the water heater's elements
if the temperature of the water in the
tank gets too hot. If the ECO has tripped,
you'll have no hot water. A tripped ECO
can usually be reset, but you should
have a qualified person investigate the
cause of the overheating and repair the
problem. Do not turn the power back on
until the cause of the overheating has
been identified and repaired.
To check the Energy Cut Off (ECO)
• Turn off the power to the water
heater.
WARNING! Working near an ener-
gized circuit can result in severe injury
or death from electrical shock. Check
power wires in the electrical junction
box with a non-contact circuit tester to
make sure power is off.
• Press the red ECO reset button (see
photo above).
• The ECO was tripped if you hear a
click when it is reset. In most cases
a tripped ECO indicates that the
tank overheated due to a problem
with one of the elements. Have a
qualified person check the upper and
lower elements and replace if neces-
sary.
• The ECO was not tripped if you didn't
hear a click. In that case it should be
checked by a qualified person.
• Replace the insulation and the upper
access panel.
• Turn the power back on to the water
heater.
3
WARNING! Be sure all covers are
secured to reduce the risk of fire and
electric shock.
Drips from T&P Relief
Valve Discharge Pipe
A small amount of water dripping from
the Temperature and Pressure (T&P)
Relief Valve usually means the home's
water pressure is too high or you need a
properly sized and pressurized Thermal
Expansion Tank. Refer to Step 1 in the
Installation section of this manual for
more information. A large amount of hot
water coming from the T&P discharge
pipe may be due to the tank overheat-
ing.
WARNING! Do not cap or plug the
T&P relief valve or discharge pipe, and
do not operate the water heater with-
out a functioning T&P Relief Valve - this
could cause an explosion.
Water pressure too high. High water
pressure can cause the T&P Relief Valve
to drip. Install a Pressure Reducing Valve
(PRV) on the main cold water supply
line. Adjust the PRV to less than 80
psi/550 kpa.
Thermal Expansion Tank. Install a
Thermal Expansion Tank. If a Thermal
Expansion Tank is already installed and
the T&P Relief Valve discharge pipe
drips, the Thermal Expansion Tank may
be pressurized to the wrong pressure or
the internal bladder may be defective.
Refer to the instructions that came with
the Thermal Expansion Tank for more
information.
Residential Hybrid Electric Heat Pump Water Heater Use and Care Guide • 23
Debris. In rare cases, debris can stick in-
side the T&P Relief Valve preventing the
valve from seating fully. In that case, the
T&P Relief Valve discharge pipe will drip.
You may be able to clear debris from the
T&P Relief Valve by manually operating
the valve, allowing small quantities of
water to flush out the debris. See the
label on the T&P Relief Valve for instruc-
tions.
If the water pressure is less than 80
psi/550kpa, a Thermal Expansion Tank is
installed and properly pressurized, the
valve has been cleared of any debris,
and it still drips, the valve may be bro-
ken—have a qualified person replace
the T&P relief valve.
Water Odour
Harmless bacteria normally present in
tap water can multiply in water heat-
ers and give off a "rotten egg" smell. A
higher tank temperature setting of 140°
kills the bacteria that causes "smelly
water" and can reduce the levels of
bacteria that cause water-borne disease.
A properly adjusted Thermostatic Mixing
Valve should be installed. In some cases,
the standard anode rod that came with
your water heater can be replaced with
a special zinc anode rod which may help
reduce or eliminate the odour. Contact a
qualified person.
NOTE: To protect the tank, an anode rod
must be installed in the water heater at
all times or the warranty is void.
In cases there the "rotten egg" small is
pronounced, you can maintain the tank
temperature at 140°F/60°C in order to
reduce bacteria growth in the tank.
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Troubleshooting
