Hydro-Hot Hydronic Heating System Owner’s Manual 08/04
®
SECTION 5: TROUBLESHOOTING
Electronic
Controller
,
continued
Low Tank-Level Cutoff Indicator Light:
This indicator light will illuminate RED when either the 120 VAC Electric Heat-
ing Element and/or Diesel-Burner have automatically shutdown due to a low
water and antifreeze solution level inside the Hydro-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 Hydro-Hot to operate properly. This fault must be manually reset
after the voltage level has been restored to the VDC battery system,
see 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 Hydro-Hot is off due to an electrical overload (i.e. short) in the main
VDC power supply circuitry.
2.
The Hydro-Hot is off due to a combination of high electrical VDC power
loads and a high surface temperature of the Electronic Controller.
The Hydro-Hot will automatically restart once the electrical overload (i.e.
short) and/or high heat condition is corrected.
Heating Zones Status Indicator Lights:
These five indicator lights (separately) will illuminate GREEN whenever a
Zone Thermostat, for each particular zone, is calling for heat. The GREEN
indicator lights also indicate that VDC power is being supplied to the particular
interior heating zone’s Heat Exchangers (i.e. fan motors). If any of the five
indicator lights illuminate RED, it indicates that an electrical overload condition
(i.e. short) has occurred in a particular heating zone’s circuitry.
NOTE:
A short in either a heating zone’s Interior Room Thermostat or
heating zone’s Heat Exchanger circuit, will cause the indicator light to
illuminate RED.
Pumps #1, #2, and #3 Indicator Lights:
These indicator lights (separately) will illuminate GREEN whenever a
Circulation Pump is operating. If any of the three indicator lights illuminate
RED, it indicates that an electrical overload condition (i.e. short) has occurred
in the particular component’s circuitry.
NOTE:
The Zone Circulation Pumps #1 and #2 are activated whenever a
Zone Thermostat calls for heat. Pump #3 / Stir Pump is activated
whenever the Domestic Water is being used on a continuous basis.
Page 10
The Hydro-Hot’s Electronic Controller must be manually reset whenever the
Low Battery Voltage fault indicator light has been activataed. The Electronic
Controller can be manually 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
.
