Operating Manual
“Warm N Dry”
www.hvsolutions.com.au
9 of 12
Copyright 2010
TECHNICAL
Troubleshooting
1. Thermostat display is on but there is no air coming out of the outlets.
a. The system may have switched the fan off automatically because the roof space
temperature is below SP2.
b. The roof space temperature is above SP1
and the “Heat” switch is off.
c. The roof space temperature is between SP1 and SP
2 and the “Fan” switch is off.
d. Duct work in the roof space has come apart.
e. The ceiling outlets are wound up and closed.
f. The filter is blocked.
g. System failure (contact HVS).
2. Thermostat display is off.
a. Power failure.
b. Unit has been unplugged in the roof.
c. System failure (contact HVS)
3. Still getting some condensation problems.
a. Slowly increase the variable fan speed control to increase air flow over 2 or 3 days
to find the optimum setting.
b. Check that air is not escaping through open vents, windows or doors. Air flow will
take the path of least resistance which will deprive other areas of adequate air
flow.
c. Ensure that the air can reach the effected rooms. Open internal doors or add
outlets if required.
d. Check and adjust the settings of SP1 and SP2 if necessary (check with HVS).
e. Check the filter.
f. Do not use un-flued gas heaters in the home.
g. Ensure exhaust extraction fans are not dumping moisture into the roof space.
h. Check for other sources of moisture that could effect the roof space such as
ground water or rising damp or uncovered gravity feed water tanks or water leaks
or no vapour barrier (sisalation) under an iron roof.
i. Curtains should be left open slightly to allow air flow to reach the glass during the
night and fully open during the day. Drilling holes in the top of enclosed pelmets
can also help ventilate behind closed curtains.
4. I no longer get condensation but the house is colder at night or when there is no sun.
a. Adjust the variable speed control down to the point just above where condensation
returns. This will be the correct and minimum setting required to achieve control
without over ventilating.
b. Increase the house heating slightly to compensate for the necessary ventilation
during very cold periods.
5. The house is too hot
a.
In warmer weather switch the “Heat” switch off, fresh air will then only be
introduced when the roof space temperature is below SP1.
6. I can smell an odour
a. You may notice some odour from the roof space for the first few days after the
system is installed or if the roof space has been disturbed. This is normal and will
disappear once it settles down and the roof space becomes ventilated by outside
fresh air.
