Residenal Hybrid Electric Heat Pump Water Heater Use and Care Guide • 25
TROUBLESHOOTING
If the water temperature at several
faucets is too cool, adjust the UIM ac-
cording to the instrucons in Step 12 of
the Installaon secon of this manual.
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 condion, you may be able to
meet your families hot water needs with
the exisng water heater by installing a
Thermostac Mixing Valve and then set-
ng the temperature to a higher seng
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 ow restrictors on
shower heads, repairing leaky faucets,
and taking other conservave steps.
Check the hot and cold connecons and
make sure your homes hot water pipe
is connected to the hot water outlet
on the water heater. Usually reversed
connecons are found soon aer the
installaon of a new unit. If copper pipes
were soldered while they were aached
to the water heater, the J-tube may have
melted. The J-tube is a curved plasc
tube inside the tank aached 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.
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 lile or no hot
water. Locate and repair the leak.
If the lower heang 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 27).
1
Find and turn o the water
heater’s circuit breaker or
remove disconnects.
2
Find electrical juncon box on
side of water heater, remove
cover and idenfy 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 o water heater’s
circuit breaker, or remove
disconnect and replace
electrical juncon box cover, before
performing maintenance work.
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.
-
TROUBLESHOOTING
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