Aqua-Hot Hydronic Heating System Shop Manual 09/04
®
SECTION 7: TROUBLESHOOTING
Section 7.10
Section 7.10,
continued
After turning the
“Electric”
switch
ON
:
TS10: The Aqua-Hot’s
120 VAC Electric Heating
Element
does not operate (i.e., lack of hot
water and/or interior heat).
Q1 : Is the Electronic Controller’s
Electric
Heating Element Status
light illuminated?
(Reference Figure 5.)
NOTE (7.10-A):
The temperature of the Aqua-Hot’s
Boiler Tank
must be below 160°F prior to performing
this test.
A:
If YES:
Perform each of the following
procedures, as necessary, until
the problem is resolved.
1. Locate the
Electronic
Controller
and remove the
Faceplate
.
2. With the
“Electric”
switch
ON
,
locate the Electronic
Controller’s
JP-3 Plug
and
check for DC voltage at
Pin 11
(+)
and
Pin 12 (-)
; reference
Appendix A.
If voltage is present:
Check for loose wire connections
at
Pin 11 (+)
and
Pin 12 (-)
of the
JP-3 Plug
. If the wire connections
are in good condition, proceed to
Q2.
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
Electric (O)
pin to
the
Electric (I)
pin; reference
Appendix A.
Does the Electronic Controller’s
Electric Heating Element Status
light
illuminate?
(continued in next column)
A:
If YES:
Check for loose wire connections
at the
“Electric”
switch and at the
JP-2 Plug’s
Electric (O)
and
Electric (I)
pins. If connections
are in good condition, replace the
“Electric”
switch.
If NO:
Locate the Electronic Controller’s
JP-2 Plug
and check for DC
voltage at the
Electric (O)
and
Electric (I)
pins; reference
Appendix A and “NOTE (7.10-B).”
NOTE (7.10-B):
Both
“Electric”
pins (i.e.,
(O)
and
(I)
)
should indicate a
positive (+)
DC voltage. Therefore,
be sure to utilize the
“JP7 GND”
stud as a
ground (-)
source
when performing this DC voltage check.
If no voltage is present:
The
Electronic Controller
must be
replaced. Please contact the
Technical Support Department at
1-800-685-4298 for assistance.
Q2 : Has the Aqua-Hot’s
VAC High-Limit
Thermostat
tripped?
WARNING:
Turn the
VAC breaker
OFF
prior to performing the following
checks. Failure to do so may result
in serious bodily injury
(
i.e., electrical shock
).
I.
Remove the Aqua-Hot’s
Thermostat Access
Cover
and locate the
VAC High-Limit
Thermostat
; reference Figure 1. Check for
continuity at the
VAC High-Limit Thermostat
.
Is continuity present?
A:
If YES:
Proceed to Q3.
If NO:
Press the red reset button located
on the
VAC High-Limit Thermo-
stat
and retest
for continuity.
NOTE (7.10-C):
Although the
120 VAC Electric
Heating Element
should now function properly, be
sure to perform the following steps until the cause for
overheating has been discovered and corrected.
Failure to do so could result in additional overheating
incidents.
!
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