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TROUBLESHOOTING
Residen al Hybrid Electric Heat Pump Water Heater Use and Care Guide • 25
5
Check/Reset Energy Cut Off
ECO Bu on.
Reset Button
1 2
Figure 28 - 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 qualifi ed person
inves gate the cause of the overheat-
ing and repair the problem. DO not
turn the power back on un l the cause
of the overhea ng has been iden fi ed
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 junc on
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
necessary.
• 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.
WARNING! Be sure all covers are
secured to reduce the risk of fi re 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 Ther-
mal Expansion Tank. Refer to Step 1 in
the Installa on sec on of this manual
for more informa on. A large amount
of hot water coming from the T&P
discharge pipe may be due to the tank
overhea ng.
WARNING! Do not cap or plug the
T&P relief valve or discharge pipe,
and do not operate the water heater
without a func oning 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 Reduc-
ing Valve (PRV) on the main cold water
supply line. Adjust the PRV to between
50 and 60 psi.
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 pres-
sure or the internal bladder may be
defec ve. Refer to the instruc ons that
came with the Thermal Expansion Tank
for more informa on.
Debris. In rare cases, debris can s ck
inside the T&P Relief Valve preven ng
the valve from sea ng 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 opera ng the valve, allowing
small quan es of water to fl ush out
the debris. See the label on the T&P
Relief Valve for instruc ons.
If the water pressure is between 50
and 60 psi, a Thermal Expansion Tank
is installed and properly pressurized,
and the valve has been cleared of any
debris, and it s ll drips, the valve may
be broken—have a qualifi ed person
replace the T&P relief valve.
Water Odor
Harmless bacteria normally present in
tap water can mul ply in water heat-
ers and give off a “ro en egg” smell.
Although elimina ng the bacteria that
causes “smelly water” with a Chlorina-
on system is the only sure treatment,
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 odor. Contact a qualifi ed
person.
NOTE: To protect the tank, an anode
rod must be installed in the water
heater at all mes or the warranty is
void.
In cases where the “ro en egg” smell
is pronounced, you can raise the tank
temperature to 140°F in order to re-
duce bacteria growth in the tank.
TROUBLESHOOTING
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