RoboVent PFX Series, Owner'S Manual

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50 ROBOVENT • PFX SERIES OWNER’S MANUAL
SECTION 1100
Troubleshooting
RoboVent unit is making excessive noise. Check the following:
1. Check for correct blower rotation, (see “Blower Rotation”).
2. Make sure the blower wheel is not hitting the venturi.
3. Check that all venturi bolts are securely tightened.
4. Make sure motor bearings are good. (Amperage rating will be higher than normal.)
Motor Overload will trip frequently/need to be set >then 125% FLA.
5. Blower wheel could be out of balance. If the blower wheel has gone out of
balance, there will be excessive vibration. In this case, please contact the RoboVent
Service Department at 1-888-762-6836. Blower wheels should only be balanced by
qualified service personnel.
Little or no suction at intake. Check the following:
1. Filters are loaded. Check the minihelic gauge on the face of the control panel. Any
reading of 6 inches W.C. or greater signals that the baffles and/or filters are loaded.
2. Check motor rotation. When the unit is powered down note the rotation of the
motor shaft. Motor rotation should be counterclockwise when viewed from above
the unit.
Differential Pressure Gauge (Minihelic) does not show a reading or a consistently
low reading.
1. Check that the clear tubing from the Minihelic Gauge has not come loose from
either of the two barbed fittings.
2. Check for a pinched line in the clear plastic tubing from the Minihelic Gauge.
Differential Pressure Gauge consistently displays a high reading.
1. Check for a pinched line in the clear plastic tubing from the Minihelic Gauge.
2. Filters are loaded and need changing.