Hydro-Hot™ Motor Coach Heating System Owner's Manual 06/02
Hydro-Hot™ Motor Coach Heating System Owner's Manual 06/02
Heating Zones
Status
#5
#4
#3
#2
#1
Electric Heating
Element Status
Low Voltage
Reset
Emergency
Cutoff
Hydro-Hot
Heating Status
Engine Preheat
Pump
Electronic
Controller
Low Battery
Voltage Fault
Low Temp
Cutoff Status
Overload Fault
Circulation
Pump #2
Circulation
Pump #1
Stir Pump
Diesel-Burner
Status
TM
By Vehicle Systems, Inc.
Motor Coach Heating Specialists
Page 5-2
SECTION 6:
ELECTRONIC CONTROLLER DIAGNOSTICS
Emergency Cutoff:
This indicator light will illuminate RED when the 120 VAC Electric Heating
Element and Diesel Burner are off due to a low water and antifreeze solution
level inside the Hydro-Hot’s Heat Tank. This fault will automatically reset when
the low level condition is corrected.
Low Battery Voltage Fault:
This indicator light illuminates RED when VDC voltage is too low for the Hydro-
Hot properly operate. The fault must be manually reset once proper voltage is
restored to the VDC battery system, see Low Voltage Reset.
Low Voltage Reset:
The Hydro-Hot must be manually reset whenever the Low Battery Voltage
Fault Indicator has been activated. To reset the Electronic Controller simply
depress the “Low Voltage Reset” button located on the Electronic Controller
(use small screwdriver or thin straight object to access the reset button
through the small hole on the Faceplate).
Low Temperature Cutoff Status:
This indicator light illuminates GREEN whenever heat is available for interior
zone heating. Whenever this indicator light is OFF this indicates domestic hot
water is being used on a continuous basis (i.e. during showers).
NOTE: The Hydro-Hot will not supply both interior zone heating and a
continuous supply of domestic hot water simultaneously. This is what is
called the “Domestic Water Priority System”.
Page 6-1
Figure 3
