Reduced Output; Smokey,Smelly Exhaust - ITR Oasis® Zephyr ™ Oasis Zephyr HW Installation And Operating Manual

Test
Component Results / Optimal Condition
Point
TP6
Power to
Control Board
TP7 Power to
Flame Sensor
TP8 Cycling
Aquastat
TP9
Overheat
Aquastat
TP10 Voltage Fault The voltage will be 0 volts if there is no voltage fault, and between 4.8 and
TP11 Remote
Switch
TP10 Reset
TP13
Thermostats
or Domestic
Water
TP14 Blown Fuse
10-10
This is the battery voltage supplied to the control board; it should be
between 11 and 15 volts.
The power to the flame sensor should read between 11 and 15 volts (same
as battery voltage).
The voltage will be between 4.8 and 5 volts if the heater is cycling (cycling
aquastat is open), and 0 if the cycling aquastat is closed.
The voltage will be 0 volts if an overheat condition is occurring or has
occurred in the past two minutes (overheat aquastat is open). The voltage
will be between 4.8 and 5 volts if the overheat aquastat is closed.
5 volts when there is a voltage fault.
The voltage will be 0 volts when the remote switch is off, and between 4.8
and 5 volts when the switch is on.
The voltage will be 0 volts when the reset button is pressed, and between
4.8 and 5 volts when the reset button is not engaged.
The voltage will be 0 volts when the thermostat or domestic water system
calls for heat and between 4.8 and 5 volts when heat is not called for.
Blown fuses for the burner, pump, or cabin fans will show a voltage of
between 4.8 and 5 volts. Good fuses will show 0 volts.

10.21 Reduced Output

The heater may run without faulting, but at a reduced output. If
this is noticed, it could be caused by the following:
High altitude
Dirty nozzle
Defective regulator
Too small a nozzle
Poor water circulation
Ash deposit in combustion chamber
10.23 Smokey, Smelly Exhaust
The heater may run without faulting, but you may experience
signs of soot, exhaust smoke and/or a pungent smell. This is
usually caused by the wrong fuel to air mixture. This can be
affected by the following:
Installation Manual for Oasis® Zephyr™ HW Heating System
Section 10-Troubleshooting