Aqua-Hot Hydronic Heating System Shop Manual 09/04
®
SECTION 7: TROUBLESHOOTING
Section 7.10,
continued
Section 7.11
Q4 : Is the
120 VAC Electric Heating Element
functioning properly?
WARNING:
The following checks
need to be performed with the
Motorhome connected to VAC
power. Therefore, be sure to use
extreme caution when performing
each check, as 120 VAC power will
be present at each of the electrical
components. Also, be sure to
disconnect VAC power prior to
replacing any electrical
components. Failure to do so may
result in serious bodily injury (
i.e.,
an electrical shock
).
I.
Disconnect the Motorhome from VAC shore
power and switch-off the Motorhome’s
Generator. Uncover the
120 VAC Electric
Heating Element
located behind the
Electric
Heating Element Access Cover
; reference
Figure 1. Remove both the
Black
and
White
wires from the
120 VAC Electric Heating
Element terminals
. Check for continuity
across the two open
terminals
.
Is continuity present?
A:
If YES:
Reference “NOTE (7.10-F).”
If NO:
The
120 VAC Electric Heating
Element
must be replaced.
Please contact the Technical
Support Department at 1-800-
685-4298 for assistance.
NOTE (7.10-F):
If the
120 VAC Electric Heating
Element
still does not seem to operate after
performing all of the listed checks, contact the
Technical Support Department at
1-800-685-4298
for additional assistance.
After turning the
“Engine Preheat”
switch
ON
:
TS11: The Aqua-Hot’s Engine Preheat System
does not preheat the engine.
NOTE (7.11-A):
The
“Diesel”
or
“Electric”
switch
must be activated, along with the
“Engine Preheat”
switch, prior to performing the following checks.
Q1 : Is the Electronic Controller’s
Engine
Preheat Pump
light illuminated?
(Reference Figure 5.)
A:
If YES:
Perform each of the following
procedures, as necessary, until
the problem is resolved.
1. Locate the
Electronic Control-
ler
and remove the
Faceplate
.
2. Locate the Electronic
Controller’s
JP-3 Plug
and
check for DC voltage at
Pin 7
(+)
and
Pin 8 (-)
; reference
Appendix A.
If voltage is present:
Check for loose wire connections
at
Pin 7 (+)
and
Pin 8 (-)
of the
JP-3 Plug
. Also, check the wire
connections at the
Engine
Preheat Pump
. If all connections
are in good condition, observe
the
Engine Preheat Pump
to
ensure that it is
operating/rotating; reference
Figure 1. If the
Engine Preheat
Pump
is not operating/rotating, it
must be replaced. Please contact
the Technical Support Department
at 1-800-685-4298 for assistance.
If no voltage is present:
The
Electronic Controller
must be
replaced. Please contact the
Technical Support Department at
1-800-685-4298 for assistance.
If NO:
Perform each of the following
procedures, as necessary, until
the problem is resolved.
1. Locate the
Electronic Control-
ler
and remove the
Faceplate
.
2. Locate the Electronic
Controller’s
JP-2 Plug
. Use a
jumper wire to make a connec-
tion from the
Preheat (O)
pin to
the
Preheat (I)
pin; reference
Appendix A.
!
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