Troubleshooting - Holiday Rambler Imperial 2008 Owner's Manual

To heat the Aqua-Hot with the diesel burner,
turn the Diesel switch to the ON position. The
switch will illuminate when the Aqua-Hot is
on. The burner will have to operate for 20 to 30
minutes before maximum heat is available for
interior heating or hot water.
WARNING:
DO NOT operate the diesel burner
if the motorhome is located inside
the building. Carbon Monoxide can
accumulate and cause asphyxiation.
Electric Heat Elements:
The Aqua-Hot is equipped with two electric
heating elements rated at 2000 watts/16.6 Amps
each. One or both elements can be operated at
one time. Both elements can only be used when
hooked to 50 Amp 240 Volt AC shore power as
total current consumption will exceed 30 Amps.
Only run one heating element if shore service
is limited to 30 Amps. While the generator
can power the electric elements, it is not fuel
effi cient to do so. Preheat time and recovery rate
are lower when using the electric elements.
The Aqua-Hot switches are located in the galley
area. Each switch will activate a single element.
Set the Aqua-Hot Electric
switch to the bottom position
to activate one element only.
Set the Aqua-Hot Electric
switch to the top position to
activate both heating elements
at one time (requires 50 Amp
shore service).
NOTE:
The Aqua-Hot has two 120 Volt AC
electric heating elements. Each element
is rated at 2000 Watts/16.6 Amps.
50 Amp 240 Volt AC shore power is
required when activating both heating
elements at once because total current
consumption will exceed 30 Amps.
Interior Heat Exchangers:
The heat exchangers are small
radiators with 12 Volt DC blower
motors. Current consumption is
approximately ½ Amp per large
heat exchanger. The small heat
exchanger used in the private
bath and the holding tank bay is
¼ Amp. Press the blower speed
switch to change the galley fan
speed. Zone 4 on the Comfort
Control must be set to Furnace for
Bath Heat to function.
Engine Preheat:
The Aqua-Hot system has an engine preheat
feature to aid engine starting in cold weather.
Inside the Aqua-Hot is an engine coolant loop
and pump that will circulate heated coolant
through the engine.
To Use Engine Preheat:
Turn ON the Aqua-Hot Diesel switch at the
AQUA-HOT
galley and allow the system to warm up.
ELECTRIC
Turn the Aqua-Hot Engine Preheat ON
using the switch at the dash to activate the
engine pump inside the Aqua-Hot. The
080375a
time required to preheat the engine varies
with ambient temperature. Allow two or
three hours of engine pre-heat time.
20 0 8 I M P E R I AL
Engine Heat Exchange System:
When traveling, the water pump on the engine
circulates heated engine coolant through the
Aqua-Hot. Heat transfers to the Aqua-Hot
coolant through convection, providing hot water
and interior heating. Use the Comfort Control to
operate the heat exchangers.
To Heat the Interior
While Traveling:
Turn ON the interior
house power.
Set the Comfort
Control to Furnace.
Select the desired Zone
AQUA-HOT
FAN
and Temperature.

Troubleshooting

080375a
An electronic display panel (Electronic
Controller) is located next to the Aqua-Hot
in the curbside bay. The display panel LED
fault indicators diagnose a problem with the
Aqua-Hot. If a heating source is selected (diesel
or electric) and the Aqua-Hot does not appear
to be working, check to see if any LED fault
indicators are lit on the electronic display panel.
NOTE:
A fault lamp may be overlooked due to
viewing angle.
Low Tank Level Cutoff: Heating
function has shutdown due to low level
of coolant in the Aqua-Hot. Check
coolant level.
APPLIANCES — 4
050200h
105