Blocked Flue - PSG CADDY ALTERNA II Installation And Operating Instructions Manual

NOTE: IF, AFTER PERFORMING ALL THE POSSIBLE SOLUTIONS MENTIONED IN THE FOLLOWING
SECTION, YOU ARE STILL EXPERIENCING PROBLEMS WITH YOUR FURNACE, CALL YOUR LOCAL
DEALER OR AFTER-SALE SERVICE AT 418-908-8002. YOU CAN ALSO WRITE AN EMAIL TO TECH@SBI-
INTERNATIONAL.COM. ALL EMAILS ARE ANSWERED WITHIN A 24H DELAY.
NOTE: IF YOU NEED TO CONTACT YOUR DEALER OR TECHNICAL SUPPORT, MAKE SURE TO HAVE
THE MODEL OF YOUR FURNACE AND THE SERIAL NUMBER ON HAND. (THEY CAN BE FOUND ON THE
CERTIFICATION LABEL INSIDE THE HOPPER LID).

10.3.1 BLOCKED FLUE

❖ Pressure tap (located on the exhaust blower) is blocked. Pull off the air hose from the exhaust blower
pressure tap and from the negative (white) pressure switch 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
or 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 sensor located in the top compartment of the blower box
assembly. If not, reinstall it.
❖ The exhaust or combustion blower failed. Go to the "TROUBLESHOOT FURNACE" page on the LCD
screen and test the exhaust and the combustion blowers independently (see Section 10.2: 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 B and D (see Section 11.9: Access the fuses) on the pellet 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 "TROUBLESHOOT FURNACE" page on the LCD (see Section 10.2: Testing Components). Start
the exhaust blower. If the pressure sensor square switches from the right column to the left column, it means
the pressure sensor functions. If not, the pressure sensor is defective and needs to be replaced.
65