Blocked Flue - Enerzone Cambridge EP00075 Installation And Operation Manual

9.3.1 Blocked Flue

Pressure tap (located on the exhaust blower) is blocked. Pull off the air hose from the exhaust
blower pressure tap and from) pressure sensor tap. WARMING: THE TUBE MUST ABSOLUTELY BE
DISCONNECTED FROM BOTH ENDS AS TO NOT DAMAGE THE PRESSURE SENSOR. Blow in the air
tube. If air flows freely, the hose is fine. If air does not flow through the hose, use a thin wire to
clear the blockage.
The flue is blocked or needs cleaning. One of the following components is obstructed or blocked
by ashes of by a foreign object; air intake shutter, combustion blower, burn pot, heat exchangers
and exhaust channels, exhaust blower and or venting system. Refer to the maintenance section.
The flue is not properly installed. Make sure the venting system meets the criteria in the
installation section of this manual as well as the venting system manufacturer's instructions.
A back draft occurred inside the flue. This can occur on a very windy day or if your venting
system does not have a proper termination.
The pressure sensor wire connections are faulty or disconnected. Make sure that the pressure
sensor telecommunication wire connections do not cause a shout-circuit or are not loose. Replace
or reconnect wires if necessary.
The pressure sensor hose is disconnected. Make sure the pressure sensor hose is well installed on
the exhaust blower pressure tap and on the pressure. If not, reinstall it.
The exhaust or combustion blower failed. Go to the troubleshooting page on the LCD screen and
test the exhaust and the combustion blowers independently (see Section 9.2 Testing
Components). If one of them does not work, make sure there is power and that blowers are well
connected. If they still don't work, check fuse F4 and F5 on the control board. A defective fuse will
be darkened or will have a broken filament. If the fuses are good, the combustion or exhaust
blower is probably defective. Replace the faulty part.
Pressure sensor is defective. Even if this is very rare, the pressure sensor could be defective. To
test it, go to the troubleshooting page on the LCD (see Section 9.2 Testing Components). Start the
exhaust blower. If the pressure switch square switches from the right column to the left column, it
means the pressure sensor works. If not, the pressure sensor is defective and needs to be
replaced.
Cambridge Pellet Stove Installation and Operation Manual
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