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5
Troubleshooting
Problem Possible Cause/Solution
AP-450 does not turn on
AP-450 starts and then shuts off
AP-450 vibrates
AP-450 change light illuminated
Motor makes noises, but AP-450
won’t turn on
• Switch not turned on-turn
• Circuit breaker or GFCI has tripped-push rest button
• No power to scrubber-make sure unit is plugged in;
check power supply
• Faulty switch-replace
• Obstructed inlet/outlet - remove obstruction
• Faulty motor - replace
• Motor shaft is bent - replace motor
• Fan blade is bent - replace
• Excessive dirt built up on fan blade - clean by wiping
with a slightly damp cloth
• HEPA filter needs replacement - replace
• Air intake restricted - remove restriction or bends/
kinks in ducting
• Damaged/faulty motor or motor shaft - replace
• Broken/loose wire to capacitor - tighten
• Damaged/faulty capacitor - replace
• Damaged housing/fan; fan will not spin - replace
housing or fan wheel
• Motor shaft set screw holding fan wheel is loose - tighten
AP-450 Max
Professional Grade Air Purifier
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