Aqua-Hot™ Hydronic Heating System Shop Manual REV-A 03/02
S
SS
SSection 6:
ection 6:
ection 6:
ection 6:
ection 6: T
T
T
T
Trrrrroubleshooting
oubleshooting
oubleshooting
oubleshooting
oubleshooting
Troubleshooting
Flow-Chart
Page 14
Turn the Control
Switch ON.
Is the indicator
light illuminated?
1. Check indicator light bulb.
Replace if necessary.
2. Remove the Aqua-Hot's
ACCESS COVER.
3. Check Aqua-Hot fuses
(E & F) for continuity, see
Figure 3. Replace if necessary.
4. Check DC power supply at the
"POWER POST" and
"GROUND POST", see Figure
3.
5. Attempt heater restart.
Check the Diesel-
Burner's
"VDC CONTROL
THERMOSTAT" (blue
dot) for continuity, see
Figure 4.
Is there continuity
across the
Thermostat?
Is there continuity
across the
Thermostat?
1. Replace the Thermostat.
2. Attempt heater restart.
1. Remove the Aqua-Hot's
ACCESS COVER.
2. Remove the "THERMOSTAT
ACCESS PANEL", see Figure
1.
3. Check the Diesel-Burner's
"VDC HIGH-LIMIT
THERMOSTAT" for continuity,
see
Figure
4.
NOTE: This Thermostat protects
against overheating temperatures.
1. Remove the Aqua-
Hot's
ACCESS
COVER.
2. Check Aqua-Hot
fuse (F) for
continuity, see
Figure 3. Replace if
necessary.
NOTE: The indicator
light will illuminate for
only 30 seconds if fuse
(F) is blown (open
circuit).
3. Attempt heater
restart.
1. Replace
Thermostat.
NOTE: Aqua-Hot
operating temperature
must be below 170
degrees Fahrenheit
when checking the
"VDC CONTROL
THERMOSTAT"
for continuity, see
Figure 4.
2. Attempt heater
restart
Is the Diesel-
Burner's
"MOTOR" (#2)
operating?
Yes
No
Yes
No
No
No
Yes
Yes
6.1
Troubleshooting Flow-Chart
