Owner`s manual

Hydro-Hot Hydronic Heating System Shop Manual 07/03
R
White wire connection at the 120 VAC Electric
Heating Element. Is voltage present?
A: If YES:
Proceed
to Q5.
If NO:
Th
e VAC Element Relay must be
replaced. Please contact out Techni-
cal
Department at 1-800-685-4298 for
assis
tance.
Q5:
Is 120 VAC Electric Heating Element
functioning properly?
WARNING: The following checks
need
to be performed with the
motorhome connected to VAC
power. Be sure to use extreme
caution
when performing each
check, as 120 VAC power will be
present at each of the electrical
componen
ts. Also, be sure to
disconnect VAC power prior to
replacing any electrical compo-
nen
ts. Failure to do so may result
in serious bodily injury (i.e. electri-
cal shock).
Disconnect the motorhome from VAC shore
powe
r. Locate the 120 VAC Electric Heating
Element in the 4 in. x 4 in. junction box.
Remove
the White (common) wire from the
120
VAC Electric Heating Element. Check for
continuity at the Black (+) wire and at the
terminal
where the White (common) wire was
removed. Is
continuity present?
A: If YES:
See
the "NOTE" on the top right-
hand side of this page.
If NO:
Th
e 120 VAC Electric Heating Ele-
ment must be replaced. Please
contact out Technical Department at
1-800-685-4298
for assistance.
NOTE: If the 120 VAC Electric Heating Element
still does not seem to operate after performing
all of the listed checks, contact our Technical
Department at 1-800-685-4298 for additional
assistance.
Section 7.10,
continue
d
Section 7.10,
continue
d
Section 7: Troubleshooting
After turning the Engine Preheat switch ON:
TS11: The Hydro-Hot's Engine Preheat System
does not preheat the engine.
NOTE: 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 proce-
dures
as necessary until the prob-
lem is resolved.
1. Locate the Electronic Controller
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 Figure 3.
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 con-
nections at the Engine Preheat
Pump. If all connections are in
good condition, listen and feel the
Engine
Preheat Pump to ensure
that it is operating, reference
Figure 1. If the Engine Preheat
Pump
is not operating, it must be
replaced.
Section 7.11
Page 39