Troubleshooting Guide - NuTone VX475 Operating Instructions Manual

TROUBLESHOOTING GUIDE

Trouble
1. Loss or decrease of vacuum
occurs.
2. Power unit does not start, or
shuts off during normal operation
with no LED showing red or
illuminated.
3. Power unit fails to stop when the
hose is removed.
4. Power unit shuts off during
normal operation, lights on unit,
wall valve and hose are all red.
5. For VX550 & VX1000 Series. All
lights on control panel flash
when unit is first plugged in.
Read before calling Service Center
Possible Cause
1a. Disposable bag or debris pail is completely full.
1b. Obstruction in the hose. A blockage in the hose can be determined by
inserting the hose into any wall inlet and, while power unit is running, check each
additional inlet for normal suction by holding the palm of your hand over the open
inlet. If normal suction is felt at all other inlets, insert the hose into a second inlet. If
the blockage still exists it is located in the hose. However, if the blockage does not
occur when the hose is changed, the blockage is probably located in the
tubing system leading to the original inlet.
1c. Obstruction in the tubing system inside the walls.
1d. Wall inlet cover not properly sealed.
1e. Exhaust tubing or vent clogged.
2a. Defective inlet. Check other wall inlets.
2b. Thermoprotector has been activated OR there is a tripped circuit breaker on the
unit.
2c. Blown fuse or tripped circuit breaker on house electrical panel.
2d. Defective hose.
2e. Microprocessor lockup.
NOTE: This applies only to the VX550 & VX1000 Series.
2f. Low-line voltage.
3. An electrical short in the low voltage control line.
4. Bag full sensing has been activated. Disposable bag is competely full.
5. Low-line voltage.
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