Kenmore 153.592500 Use & Care Manual page 24

TROUBLESHOOTING CHART
PROBLEM
NO DISPLAY
NO HOT WATER
INSUFFICIENT HOT WATER/
SLOW HOT WATER RECOVERY
TEMPERATURE TOO HIGH
LOW WATER PRESSURE
WATER ODOR
SOUNDS
DRIP FROM TEMPERATURE &
PRESSURE RELIEF VALVE
24 • Residen al Hybrid Electric Heat Pump Water Heater Use and Care Guide
POSSIBLE CAUSE(S)
1. Sleep Mode
1. No power to the water heater (No
lights on the unit are on).
2. Unit in Vacation mode
3. ECO tripped
4. Hot water usage pattern exceeds the
capability of the water heater in cur-
rent mode
5. Non-functioning upper temperature
sensor
6. Faulty thermostatic mixing valve.
7. Leak in plumbing system
1. Temperature set-point too low
2. Air filter dirty
3. Hot water leak at faucet or piping
4. Non-functioning heating element
5. Hot water usage pattern exceeds the
capability of the water heater in cur-
rent mode
6. Water connections to unit reversed
7. Out of position outlet j-tube.
8. Thermostatic mixing valve faulty/set
too low.
1. Water temperature set point too
high.
2. Thermostatic mixing valve faulty/set
too high.
1. Partially closed supply valve
1. A sulfate reducing bacteria which has
accumulated within the water heater
(this harmless bacteria is nontoxic to
humans).
1. Normal expansion and contraction of
metal parts during periods of heat-up
and cool-down.
2. The heat pump compressor or fan
running.
3. Sediment buildup on or around the
elements.
1. Excessive water pressure
2. Add or service a thermal expansion
tank.
3. Debris under valve seat.
CORRECTIVE ACTION
1. Touch any button to wake up UIM
1. Check for tripped breaker or disconnect.
Restore power to unit.
2. Press Mode/Enter button and return to
desired operating mode (page 19-20).
3. Reset the Energy Cut Off (ECO) switch; see
"Check/Reset Energy Cut Off" section for
more information (page 26).
4. Change to different operating mode or
modify usage patterns (page 19-20).
5. Refer to "Element Testing and Replace-
ment", (page 25 & 30).
6. Check hot water at other faucets.
7. Check hot water side of home's plumbing
system for leaks.
1. Increase set point temperature; see "Water
Temperature Adjustment" section (page 18).
2. Clean air filter (page 33).
3. Repair hot water leaks.
4. Refer to "Element Testing and
Replacement", (page 25 & 30).
5. Change to different operating mode or
modify usage patterns.
6. Ensure the cold connection is at the bottom
and that the hot connection is at the top.
7. Check orientation of alignment mark with
arrow, re-install if necessary.
8. Check hot water at other faucets.
1. Decrease set point temperature, see "Water
Temperature Adjustment" page 19.
2. Adjust temperature setting of thermostatic
mixing valve.
1. Open supply valve completely.
1. Install thermostatic mixing valve, increase
water temperature set point to 140°F
1. No action required.
2. No action required.
3. Replace element (see "Replacing the Heat-
ing Element", page 30).
1. Check water supply inlet pressure. If higher
than 80 PSIG, install a pressure reducing
valve. 50-60 PSIG is the recommended pres-
sure.
2. See "Water Pressure/Thermal Expansion"
section (page 9).
3. See "Drips from T&P Relief Valve Discharge
Pipe" section (page 26).