Airxcel Aqua-Hot 100 Series, Руководство по обслуживанию

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Controller Operating the LCD
©Aqua-Hot®
125-DN1 Service Manual REV 220421
©Aqua-Hot®
125-DN1 Service Manual REV 220421
p. 13 p. 12
Electrical Element Activation(3):
Similar to the external diesel burner, tapping this button
will signal to the controller to activate the AC electric relay,
energizing the 1500W electric element within the Aqua-Hot.
ON:
While ON, the electric element will work to
maintain a tank temperature of 180°F, with a
minimum tank temperature of 165° F.
OFF:
While off, the element will not serve to
provide any heat to the boiler of the Aqua-Hot
whatsoever.
System Status(4):
This item will indicate the current operational status of the
Aqua-Hot. If any faults have triggered, those will be displayed
here.
During normal operation, this should display either INTERIOR
HEAT or HOT WATER relating to the priority and position of the
3-way valve.
While in INTERIOR HEAT mode, the three-way valve is oriented
so as to circulate heated antifreeze and water solution through
the heating zones of the coach.
While in HOT WATER mode, the three-way valve is oriented
so that the heated antifreeze and water solution is circulated
immediately back into the boiler tank. This is known as “stirring”
the tank, and it is done to provide as much heat as possible to
the domestic water lines while water is flowing.
Module Options (5):
Tapping on the module options button will display the screen
shown above. From here, it is possible to access unit diagnostics,
activate Quiet Mode, change the temperature units, adjust
screen brightness, and unit timeout.
Screen Timeout (A):
The screen timeout item sets the amount of time required
to allow the screen to shut-off when idle.
Screen Brightness (B):
This setting changes the screen brightness.
Unit of Measurement (C):
This setting will change the display units of the Aqua-Hot.
Either Fahrenheit or Celsius can be selected.
Quiet Mode (D):
This option toggles the Aqua-Hot’s Quiet mode. Quiet
mode is a setting where the speed and output of the heat
exchanger fans is reduced to 80%. This is done to reduce
noise of the heat exchangers.
Please note that this feature must be activated and
deactivated as needed.
Aqua-Hot Diagnostics (E):
Tapping on this element will direct you to the Aqua-Hot’s
built-in diagnostic, testing, and troubleshooting tools.
The Aqua-Hot Controller
Introduction:
The Aqua-Hot 125DN operates on a controller platform
which has been modernized and updated from the previously
used Electronic Controllers and Relay Control Boards of older
Aqua-Hot units.
This controller is best utilized with the Aqua-Hot 5in display.
Using the Aqua-Hot with this new display will ensure that you can
take advantage of all of the tools and features of this controller.
Features:
This new controller brings with it new features to it which
effect functionality from every stage of operation. Fail safe
functionality, climate control, and troubleshooting and
diagnostics have all been overhauled on this new control
architecture. These features will be explained in detail below.
Troubleshooting:
The new troubleshooting functionality is perhaps the largest
and most substantial change to come about from the new
controller architecture. Many faults and failures within the
Aqua-Hot can now be relayed in plain language to the technician
servicing the Aqua-Hot. There are five system faults which will
be utilized; System Voltage, Low-Level Cutoff, Over-Current,
Overheat, and Burner Failed to Ignite. These will be explained
next.
System Voltage:
System voltage faults indicate that there is
a problem with the coach-side power supply
which powers the Aqua-Hot.
The Aqua-Hot can only operate within a
voltage range of 11V DC to 16V DC. If voltage
drops below 11V, or exceeds 16V DC, the
controller will shut down the Aqua-Hot as a
safety mechanism.
Low-Level Cutoff:
The Low-Level Cutoff fault will only trigger if
the minimum fluid level within the Aqua-Hot
is below an acceptable operational threshold.
If the controller is showing a low-level cutoff
fault, begin by diagnosing the float sensor.
Over-Current:
Over-current faults are triggered by an output
channel (pump, fan, etc) that is attempting
to draw too much current through the
controller. This fault will be accompanied by
the component which triggered the fault,
for example “PUMP 2 OVER-CURRENT” will
display if Pump 2 is not operating correctly.
If over-current faults are appearing on the
display, troubleshoot the offending component
listed as being over-current.
Overheat:
Overheat faults indicate that the unit has
exceeded its overheat threshold of 210°F.
If an overheat condition has occurred,
diagnose the cause of the overheat by
investigating the heating sub-systems of the
Aqua-Hot (electric and/or diesel burner ).
Under-Current
Under-current faults indicate that the unit
does not have enough voltage to properly
operate. If voltage drops below 11V, the
controller will shut down the Aqua-Hot as a
safety mechanism.
If an under-current fault is displayed on the
screen, troubleshoot the offending component
listed and also check power into the Aqua-Hot.
The fault codes shown above will cover the most common
Aqua-Hot related issues. For more complex issues, it may be
necessary to utilize the DIAG screens, which will be explained
next.
Figure 17
Figure 16
A
B
C
D
E