Product Warranty
28 • Residen al Hybrid Electric Heat Pump Water Heater Use and Care Guide
TROUBLESHOOTING
User Interface Module (UIM) set too
low. If the water temperature at several
faucets is too cool, adjust the UIM ac-
cording to the instruc ons in Step 12 of
the Installa on sec on of this manual.
Undersized water heater. If your water
heater runs out of hot water too quickly,
it may be too small for your needs. If the
water heater is old, consider replacing it
with a larger model. If the water heater
is in good condi on, you may be able to
meet your families hot water needs with
the exis ng water heater by installing a
Thermosta c Mixing Valve and then set-
ng the temperature to a higher se ng
on the UIM. See “Step 12” on page 16.
You can also reduce your homes hot
water needs by washing clothes in cold
water, installing fl ow restrictors on
shower heads, repairing leaky faucets,
and taking other conserva ve steps.
Reversed connec ons or melted J-tube.
Check the hot and cold connec ons and
make sure your homes hot water pipe
is connected to the hot water outlet
on the water heater. Usually reversed
connec ons are found soon a er the
installa on of a new unit. If copper pipes
were soldered while they were a ached
to the water heater, the J-tube may have
melted. The J-tube is a curved plas c
tube inside the tank a ached to the cold
water inlet. If the J-tube has melted, it
can be replaced by removing the old
J-tube and installing a new one.
Plumbing leak. Even a small leak in the
hot water side of the homes plumb-
ing system can make it appear that the
water heater is producing li le or no hot
water. Locate and repair the leak.
Lower hea ng element not working.
If the lower hea ng element is not
working, you will have some hot water
but not as much as before. Because the
lower element does most of the work,
it usually wears out before the upper
element. Replace the lower element if
necessary (see page 30).
Power Cycling the Unit:
1
Find and turn off the water
heater’s circuit breaker or
remove disconnects.
2
Find electrical junc on box on
side of water heater, remove
cover and iden fy the two (2)
power wires.
3
Turn circuit breaker back on (or
re-install the disconnects) and
check for power on both
incoming power wires using a voltmeter.
4
Again, turn off water heater’s
circuit breaker, or remove
disconnect and replace
electrical junc on box cover, before
performing maintenance work.
NOTE: When powered on the unit will
start to run a system diagnostic. This
typically takes eight (8) minutes and
the UIM will display - -- --- repetitively
during this period.
WARNING! Working near an ener-
gized circuit can result in severe injury
or death from electrical shock.
WARNING! When you are fi nished,
be sure all covers are secured to reduce
the risk of fi re and electric shock.
TROUBLESHOOTING