Aqua-Hot Hydronic Heating System Shop Manual 09/04
®
SECTION 4: ELECTRONIC CONTROLLER
Electronic
Controller,
continued
4.4
Low Voltage Reset
The Aqua-Hot’s
Electronic Controller
must be manually reset whenever the
Low Battery
Voltage
fault indicator light has been activated; reference Figure 5. The
Electronic
Controller
can be manually reset either by depressing the
“Low Voltage Reset”
button
located on the
Electronic Controller
(use a thin, straight object to access the reset button
through the small hole in the faceplate) or by turning
OFF
the
“Diesel”
switch on the
Heater’s
Interior Switch Panel
for approximately 30 seconds, then turning the switch back
ON
.
4.5
Low Tank-Level Cutoff Indicator Light
This indicator light will illuminate RED when either the
120 VAC Electric Heating Element
and/or the
Diesel-Burner
have automatically shut down due to a low water and antifreeze
solution level inside the Aqua-Hot’s
Boiler Tank
; reference Figure 5. This fault will
automatically reset when the low-level condition is corrected.
4.6
Heating Status Indicator Light
This indicator light will illuminate GREEN whenever the Aqua-Hot’s
VDC/VAC Control
Thermostat
is calling for heat, allowing the water and antifreeze solution in the
Aqua-Hot’s
Boiler Tank
to be heated by either the
Diesel-Burner
and/or the
120 VAC
Electric Heating Element
; reference Figure 5. When this indicator light is off, no heat is
being supplied to the Aqua-Hot’s
Boiler Tank
. Please note that this light will only be
active if either the “
Diesel”
and/or the “
Electric”
switch are turned
ON
; reference Figure 4.
NOTE:
The Aqua-Hot’s
VDC/VAC Control Thermostat
will automatically activate the
Diesel-Burner
and/or the
120 VAC Electric Heating Element
only
if the “
Diesel”
and/or
the “
Electric”
switch is in the
ON
position. In order to heat the motorhome/domestic hot
water, simply choose the desired heat source(s) and leave the switch(s) (i.e., “Diesel”
and/or “Electric”)
ON
.
4.7
Engine Preheat Pump Indicator Light
This indicator light will illuminate GREEN whenever the
Engine Preheat Pump
is operat-
ing; reference Figures 1 and 5. Please note that this light will only be active if the
“
Engine Preheat”
switch is
ON
in conjunction with either the “
Diesel”
and/or the “
Electric”
switch; reference Figure 4. If this indicator light illuminates RED, it indicates an electrical
overload condition (i.e., a short) has occurred in this particular component’s circuitry.
4.8
Pump #1 Indicator Light
This indicator light will illuminate GREEN whenever
Circulation Pump #1
is operating;
reference Figures 1 and 5. Please note that this light will only be active if the
Aqua-Hot
is
at normal operating temperature (i.e., between 160°F and 190°F) and
Heating Zone #5
is
calling for heat; reference Appendix A. If this light illuminates RED, it indicates an
electrical overload condition (i.e., a short) has occurred in this particular component’s
circuitry.
4.9
Pump #2 Indicator Light
This indicator light will illuminate GREEN whenever
Circulation Pump #2
is operating;
reference Figures 1 and 5. Please note that this light will only be active if the
Aqua-Hot
is
at normal operating temperature (i.e., between 160°F and 190°F) and if either
Heating
Zones #2, #3, or #4
are calling for heat; reference Appendix A. If this light illuminates
RED, it indicates an electrical overload condition (i.e., a short) has occurred in this
particular component’s circuitry.
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