Aqua-Hot Hydronic Heating System Shop Manual 09/04
®
SECTION 7: TROUBLESHOOTING
Section 7.1
Section 7.1,
continued
After turning the “
Diesel”
switch
ON
:
TS1 : The Aqua-Hot’s
Diesel-Burner
fails to
operate.
NOTE (7.1-A):
In order to perform the following
checks, it is necessary to locate the Aqua-Hot’s
Electronic Controller
and
Switch Panel
; reference
“Illustration 7.1-1.”
Q1 : Is the Electronic Controller’s
Low Tank-
Level Cutoff
light illuminated?
A:
If YES:
Perform each of the following
procedures, as necessary, until
the problem is resolved.
If NO:
Proceed to Q2.
WARNING: DO NOT
remove the
Aqua-Hot’s
Radiator Cap
when the
heater is at maximum operating
temperature; reference Figure 1.
Hot coolant can be present, and
serious personal injury may result.
I
.
Check the coolant level in the Aqua-Hot’s
Expansion Tank
and the
Boiler Tank
, if
necessary.
A:
If coolant level is satisfactory:
Continue troubleshooting.
If coolant level is low:
Add coolant and attempt heater
restart.
II.
Check for continuity at the
Float Switch
;
reference Figure 1 and Appendix A.
A:
If continuity exists:
Continue troubleshooting.
If continuity does not exist:
The
Float Switch
must be
replaced. Please contact the
Technical Support Department
at 1-800-685-4298 for assistance.
III.
Remove the Electronic Controller’s
Faceplate
and use a jumper wire to make a
connection from
Pin 15
to
Pin 16
on the
JP-3 Plug
; reference Appendix A.
Does the
Emergency Cutoff
light go off?
(continued on next page)
!
Switch Panel
Diesel
Electric
Engine
Preheat
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Illustration 7.1-1
Page 17
