American Water Heater HPE10280H045DV Benutzerhandbuch

37

Electric mode selected

Change to effi ciency or hybrid for 
reducing energy costs

Ambient air temperature 
preventing compressor operation

Ambient air temperature must 
be ≥ 45°F and ≤109°F to enable 

compressor operation.

Air fi lter dirty

Clean or replace air filter

Temperature set point too high

Decrease set point temperature; 

see “Adjusting Set Point 

Temperature” section (p.13)

Water connections to unit reversed Ensure the cold connection is 

at the bottom and that the hot 

connection is at the top

Heat lost through long run of 
exposed pipe or a recirculation 
system

Insulate exposed piping. It may be 

necessary to discontinue use of 

re-circulation system.

Hot water leak at faucet or piping

Repair hot water leaks

Sediment or scale build up in tank

Drain and flush tank. Water 

conditioning may be required to 

minimize build up

Excessive water pressure

Check water supply inlet pressure. 
If more than 80 PSIG, install a 
pressure reducing valve

Add or service a thermal 
expansion tank

See “Closed System/Thermal 
Expansion” section (p.10)

Malfunctioning Temperature & 
Pressure Relief Valve

Replace the Temperature & 
Pressure relief valve.

The heat pump does not run in 
effi ciency mode

If ambient temperature is greater 
than 109°F or less than 45°F the 
heat pump will not operate.

The gasket and or threads are 
leaking

Re-seal or replace gasket. See 
“Heating Element Replacement” 
(p.24), for draining and fi lling 
procedures.

See also “Leaks around Tank 
Fittings”