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Aqua-Hot™ Hydronic Heating System Owner’s Manual 07/04
Page 11
SECTION 6: TROUBLESHOOTING
6.2 Electronic Controller Diagnostic
#5
#4
#3
#2
#1
Electric Heating
Element Status
Low Voltage
Reset
Low Tank-Level
Cutoff
Heating Status
Engine PreHeat
Pump
Low Battery
Voltage Fault
Low Temp
Cutoff Status
Overload Fault
Pump #2
Pump #1
Pump #3
Diesel-Burner
Status
Heating Zones
Status
ELECTRONIC CONTROLLER
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R
Electronic
Controller
Figure 6
SECTION 6: TROUBLESHOOTING
Electronic
Controller ,
continued
Low Tank-Level Cutoff Indicator Light:
This indicator light will illuminate RED when either the Electric Heating
Element(s) and/or Diesel-Burner have automatically shut down due to a low
water and antifreeze solution level inside the Aqua-Hot’s Boiler Tank. This fault
will automatically reset when the low level condition is corrected.
Low Battery Voltage Fault Indicator Light:
This indicator light will illuminate RED whenever the VDC voltage level is too
low for the Aqua-Hot to operate properly. This fault must be manually reset
after the voltage level has been restored to the VDC battery system, reference
Low Voltage Reset below.
Low Voltage Reset (Button):
Overload Fault Indicator Light:
This indicator light will illuminate RED whenever one of the following conditions
have occurred:
1. The Aqua-Hot is off due to an electrical overload (i.e., short) in the main
VDC power supply circuitry.
The Aqua-Hot’s Electronic Controller must be manually reset whenever the
Low Battery Voltage Fault indicator light has been activated. The Electronic
Controller can be reset either by depressing the “Low Voltage Reset” button
located on the Electronic Controller (use a thin, straight, nonmetallic object to
access the reset button through the small hole in the faceplate) or by turning
OFF the Diesel switch on the Heater’s Interior Switch Panel for approximately
30 seconds, then turning the switch back ON.
SECTION 6: TROUBLESHOOTING