American Water Heater HPE10260H045DV Manual Do Utilizador

25

An energy cutout (ECO) switch is installed on this 
water heater to shut down the water heating means 
in the event of a malfunction. If the upper tank 
temperature reaches 190°F. the ECO contacts will 
open breaking the L1 and L2 legs that feed the upper 
heating elements. The ECO also interrupts power to 
the compressor control relay, which in turn shuts off 
power to the compressor. Some models will not have 
a compressor relay in which case the compressor will 
be controlled directly by the ECO. Refer to the wiring 
diagram located on the control box cover to see if a 
given unit is equipped with a compressor control relay.

If the ECO has tripped, it must be manually reset as 
follows below.

1.  Shut off power to the unit at the breaker/fuse 

panel prior to servicing the unit.

2.  Gain access to the ECO located in the upper 

element compartment, above the element.

3.  Check the temperature of the tank. In order to 

manually reset the ECO, the tank temperature 
must fi rst drop below 120°F.

4.  Press the red button located on the front of the 

ECO.

5.  Apply power to the unit. Once the ECO has 

been reset, the fault on the user interface 
module should clear and the water heater 
should return to normal operation.

If resetting the ECO does not clear the error, the ECO 
will need to be checked. Follow the procedure below.

NOTE: Tank temperature must be less than 120°F in 
order to re-set ECO.

RY 203

Upper Element

COM to NO (Top of Relay)

RY 205

Lower Element

CN206 pin 1 to 4

RY 207

Compressor

CN202 pin 1 to 2

1.  Shut off power to the unit at the breaker/fuse 

panel prior to servicing the unit.

2.  Gain access to the ECO located in the upper 

element compartmant, above the element.

3.  Remove the black wire from terminal number 

one (1) and the white wire from terminal 
number three (3) on the ECO.

4.  Using an Ohm meter or continuity tester, 

check pin 1 to pin 2; there should be continuity 
(very low resistance). If resistance is high or 
continuity checks bad, replace the ECO. Check 
pin 3 to 4, again there should be continuity. If 
not replace the ECO.

It is very important to investigate why the ECO tripped 
as the control board may be faulty. Check the relays on 
the control board to determine if the contacts might be 
stuck closed; check the three relays listed in Table 3 by 
checking pin to pin resistances as noted. Resistance 
should be greater than 1 mega-Ohm (no continuity) 
between the pins as listed in the table. If the resistance 
between any of the pin combinations listed is less than 
1 mega-Ohm, replace the control board.