TROUBLESHOOTING
22 • Residenal Hybrid Electric Heat Pump Water Heater Use and Care Guide
-
If you are not qualified or are not
comfortable performing any of the
troubleshooting, repair or maintenance
procedures that follow, Call our Technical
Assistance Hotline at 1-800-527-1953 for
further assistance.
The most likely reasons for an electric
water heater to produce NO hot water are:
• No power to the water heater (No lights
on the unit are on).
• Unit in Vacation Mode.
• ECO tripped.
• Hot water usage pattern exceeds the
capability of the water heater in current
mode.
• Non-functioning upper temperature
sensor.
• Faulty thermostatic mixing valve.
• Leak in plumbing system.
Follow these steps to diagnose and correct
common electrical problems:
1
No hot water is
oen caused by a problem with
the homes electrical wiring or circuit
breakers. You’ll need a non-contact circuit
tester. Follow these guidlines:
• Locate the water heater’s circuit
breaker and turn it off (or remove the
circuit’s disconnects).
• Locate the electrical junction box
on the side of the water heater and
remove the cover.
• Identify the two power wires. The
power wires are usually black/black or
black/red-the green or copper wire is
the ground wire.
Figure 28 - Use a non-contact circuit tester
to check for electrical power.
• Turn the circuit breaker back on (or
install the disconnects) and check the
power on both incoming power wires
using a non-contact circuit tester.
• Turn the power off and replace the
cover on the electrical junction box.
If the water heater is not getting power,
contact a qualified person to have your
homes wiring or circuit breakers checked.
2
If the water heater is
geng electrical power, check to
see if the upper heang element is burned
out. If the upper element is burned out,
you’ll have no hot water. To check the
upper element, you’ll need a mulmeter
capable of reading resistance.
• Turn the power OFF at the circuit
breaker or remove disconnects.
• Remove the upper access panel.
• Move the insulation to the side to
access the ECO and heating element.
3
• WIth the electrical power off, remove
the two power wires from the upper
heating element.
Figure 29 - Use a mul meter to check the
resistance of the upper heang element.
4
Measure the
resistance between the two screw
terminals on the upper heang element. A
good element will have a resistance
ranging between 5 and 25 Ohms. If the
resistance is:
Replace the element
(see Replacing the Heang Element sec-
on on page 27). If the lower element is
a concern, repeat the element check pro-
cedure for the lower element. The upper
and lower elements should have the same
resistance range.
Reaach the power
wires, making sure the wires are in good
condion and the connecons are clean
and ght. Next check the following: ECO,
on next page.
TROUBLESHOOTING
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