Univex 318258-000 Manual De Usuario

17

Hot water usage pattern exceeds the 

1. 

capability of the water heater in 

current mode

No power to the water heater

2. 

Unit in standby

3. 

Unit in Vacation mode

4. 

High temperature limit switch open

5. 

Non-functioning upper temperature 

6. 

sensor

Change to different mode or modify usage 

1. 

patterns

Check for blown fuse or tripped breaker.  

2. 

Restore power to unit then press power button.

Press the power button to turn the unit on

3. 

Select mode other than Vacation

4. 

Reset the high temperature limit switch; see 

5. 

“Safety shut-off” section for more information

Contact a qualified person for service

6. 

Temperature set-point too low

1. 

Air filter dirty

2. 

Hot water usage pattern exceeds the 

3. 

capability of the water heater in 

current mode

Water connections to unit reversed

4. 

Heat lost through long run of exposed 

5. 

pipe

Hot water leak at faucet or piping

6. 

Non-functioning heating element

7. 

Sediment or scale build up in tank

8. 

Increase set point temperature; see “Adjusting 

1. 

the User Interface Module” section

Clean air filter

2. 

Change to different mode or modify usage 

3. 

patterns (For example if in Efficiency Mode 

switch to Hybrid Mode)

Ensure the cold connection is at the bottom 

4. 

and that the hot connection is at the top

Insulate exposed piping

5. 

Repair hot water leaks

6. 

Call qualified person for service

7. 

Drain and flush tank.  Water conditioning may 

8. 

be necessary to minimize build up

Temperature set-point too high

1. 

Air filter dirty

2. 

Electric mode selected

3. 

Water connections to unit reversed

4. 

Heat lost thru long run of exposed 

5. 

pipe

Hot water leak at faucet or piping

6. 

Sediment or scale build up in tank

7. 

Decrease set point temperature; see “Adjusting 

1. 

the User Interface Module”

Clean air filter

2. 

Change to Efficiency or Hybrid mode for re-

3. 

duced energy costs

Ensure the cold connection is at the bottom 

4. 

and that the hot connection is at the top

Insulate exposed piping

5. 

Repair hot water leaks

6. 

Drain and flush tank.  Water conditioning may 

7. 

be required to minimze build up

1.  Excessive water pressure

2.  Add or service a thermal expansion 

tank.

3. Non-functioning 

Temperature 

& 

Pressure Relief Valve

1.  Check water supply inlet pressure. If higher 

than 80 PSIG, install a  pressure reducing 

valve

2.  See “Closed System/Thermal Expansion” section

3.  Replace the Temperature & PressureRelief 

Valve

The water heater does not 

1. 

immediately start 

The heat pump does not run in 

2. 

Efficiency mode.

The heat pump runs when set to 

3. 

Electric mode.

When first started the water heater takes about 8 

1. 

minutes to complete a diagnostic routine

Contact a qualified person for service

2. 

Contact a qualified person for service

3.