Section 4 --- Appliances
The Executive 2005
192
Troubleshooting
If the operating conditions have been met, a heating
source is selected and the Aqua-Hot doesn't appear to be
working there are some quick checks that can be made to
determine the problem. Located in a curb side compart-
ment near the Aqua-Hot unit is the Electronic Controller.
Depending on the floor plan this can be a hard panel to
view straight on and an indication may be overlooked. A
quick glance of the panel can show the fault location. Any
RED light indicates a fault condition. Understanding the
light indications and what they mean are important in
diagnosing the system.
The most critical lamp would be the Heating Status
LED. When this lamp is off no heat is being supplied to
the heat tank. A GREEN indication means one or both of
the heat sources are heating the tank. The heating element
indicator is GREEN whenever AC Power is being sup-
plied. A RED lamp here indicates an overload or a short
circuit condition in the DC powered electrical circuits. A
service technician should investigate this.
The LOW TANK LEVEL CUT OFF lamp indicates one of two things,
there is a low liquid level in the heat tank or there was a strong impact to the
unit. Whenever this occurs the electronic controller must be manually reset. If
the power has been disconnected for an extended period of time this may generate a
LOW TANK LEVEL CUT OFF indication. Again this would require the electronic controller to be
manually reset. This condition could be related to a LOW BATTERY VOLTAGE FAULT. If 12 Volts
DC drops below 10.5 Volt DC the system will not operate. Once proper operating voltage is restored a
LOW BATTERY VOLTAGE FAULT will reset automatically. Remember; look to see if a LOW
TANK LEVEL CUT OFF was generated.
Another indicator that is probably the most misunderstood indication of all is the LOW TEMPER-
ATURE CUTOFF STATUS. A GREEN indication means heat is available for interior heat. When this
lamp is OFF, a continuous demand for domestic hot water is being used.
Heating the interior of the motorhome requires the comfort control to be turned on and set to fur-
nace. When there is a call for heat the system will activate the circulation pumps. The fan speed selec-
tor switches will have power applied to them and will be audible when turned ON.
040486b
Using a small
device, this can be
manually reset.
040486c
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