Aqua-Hot 400 Series Service Manual page 35

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Check the electric element's wires for continuity by
completing the following:
a. Disconnect the motor home from shore power/
shut off generator.
b. Disconnect the wires from the electric heating ele-
ment.
c. Disconnect the wires from the AC terminal block.
d. Check the black and white wires at the terminal
block for continuity.
6. Check the electric heating element for functionality by
completing the following:
a. Disconnect all power supplies.
b. Remove the AC access cover.
c. Remove all wires from the electric heating ele-
ment.
d. Using an ohmmeter, check the electric heating
element for the proper ohms. The ohms reading
should be between 8.5 to 9.5 ohms.
If the ohms reading is not between 8.5 to 9.5 ohms follow
the instruction in this section to replace the electric heating
element.
Electrical-AC
Replacement Procedure:
Failure to disconnect all power supplies and/or to allow the
heater to cool before servicing could cause serious damage
or personal injury.
1. Ensure the Aqua-Hot has been completely shut down
and that all power sources have been disconnected.
Also, because this replacement procedure will involve
the boiler tank and the potential for hot coolant, be
sure the heater has adequately cooled.
2. Drain the antifreeze and water heating solution from
the Aqua-Hot's boiler tank using the drain valve.
3. Remove the AC access cover.
4. Remove the two wires secured to the defective electric
heating element by releasing the screw terminals.
5. Using a 1-1/2 inch socket, remove the defective elec-
tric heating element from the Aqua-Hot's boiler tank.
6. Install the replacement 1650-Watt electric heating ele-
ment into the boiler tank ensuring that the "up" letter-
ing on the element is installed in the up position.
7. Connect the wires removed from the defective electric
heating element to the replacement electric heating
element and tighten the screw terminals.
8. Reinstall the AC access cover.
9. Refill the Aqua-Hot's boiler tank with the antifreeze and
water heating solution.
Figure 21
AC Terminal Block
Electrical Heating Element
AC Relay
© Aqua-Hot® AHE-400-P01 Service Manual Rev.B June 2014
Section #: Title
Aqua-Hot Components
p.
35