Service manual

— Page 36 —
© January 2013 Aqua-Hot
®
600-D01 Series Hydronic Heating System Service Manual - Rev. A
SECTION 4: AQUA-HOT COMPONENTS
Electrical - AC
Electric Heating Element: Right
The electric heating element uses AC power as an alternate
power source for heating the Aqua-Hot’s boiler tank.
Troubleshoot the electric heating element if the following
condition has occurred:

There is a lack of hot domestic water and interior heat
when the electric element is selected as the heating
source.
Troubleshooting:
NOTE:
For continuous domestic hot water to be present,
the diesel-burner must be selected also as a heating source.
1.
Verify that the motor home is either plugged into shore
power or that the generator is running to provide AC
power.
2.
Verify that both the “Electric Heating Element Status”
and the “Heating Status” indicator lights on the electron-
ic controller are illuminated.
If the “Electric Heating Element Status” indicator light
on the electronic controller is not illuminated, complete
the following:
A.
Verify that the electric element switch on the interi-
or switch panel is on.
B.
Install a jumper wire on the JP2 plug, between pins
52 and 53 (“ELECT-O” and “ELECT-I”) on the
electronic controller to bypass the electric element
switch.
If the “Electric Heating Element Status” indicator
light illuminates on the electronic controller with
the jumper wire installed, check the Electric Ele-
ment Switch, on the interior switch panel for func-
tionality.
If the “Electric Heating Element Status” indicator
light does not illuminate on the electronic controller
with the jumper wire installed, follow the instruc-
tions in this manual to replace the electronic con-
troller.
If the “Heating Status” indicator light on the electronic
controller is not illuminated, complete the following:
A.
Check the temperature of the Aqua-Hot’s boiler
tank.
If the boiler tank temperature is below 158°F, trou-
bleshoot the control thermostat.
If the boiler tank is above 158°F, the Aqua-Hot is at
operating temperature and requires no heat.
3.
If the Heating Status Light is Illuminate Verify the
Electronic Controller is sending 12 Volt DC to the
A.C. Relay.
A. Using a volt meter check pins 11 & 12 (“AC
REL -” and “AC REL +”) for 12-Volt D.C on
the JP3 plug.
If 12 Volts of DC power are not present while the
“Electric Heating Element Status” and “Heating Status”
indicator lights on the electronic controller are illuminat-
ed, follow the instructions in this manual to replace the
electronic controller.
4.
If 12 Volts of DC power are present at the relay, com-
plete the following: follow the troubleshooting section
for the Right A.C. Relay in this section.
5.
If the Electronic controller is send 12 VDC to the Relay
verify that the electric heating element is receiving ade-
quate AC power by completing the following:
A.
Remove the AC access cover.
B.
Plug the Coach into shore power/turn generator on.
There are two different Models in the Aqua-Hot 600 Series.
The Aqua-Hot 600 has 2-2000 Watt 120 VAC electric heat-
ing elements. The Aqua-Hot 675 has 1-2000 Watt 120 VAC
electric heating element (Right), and 1-4500 Watt 240 VAC
electric heating element (Left)