Is there a way to determine the power wire for a window fan motor?

[Paulus]

Greetings:

I took a motor out of a window exhaust / ventilation fan, which
circuitry can control speed, thermostat and rotation direction
(exhaust or ventilation). The motor has 6 wires 2 black, gray, red,
white and brown. WHT - BRN measures 100ohm, RED - GRY measures
290ohm, the rest of the wire has Mohm resistance. I can hear the
motor making some noise when applying 115VAC from an outlet directly to
WHT - BRN
and RED - GRY. However, the fan doesn't rotate. Am I missing
something?

Any suggestion and help is greatly appreciated.

 

[Sam Goldwasser]

Greetings:

I took a motor out of a window exhaust / ventilation fan, which
circuitry can control speed, thermostat and rotation direction
(exhaust or ventilation). The motor has 6 wires 2 black, gray, red,
white and brown. WHT - BRN measures 100ohm, RED - GRY measures
290ohm, the rest of the wire has Mohm resistance. I can hear the
motor making some noise when applying 115VAC from an outlet directly to
WHT - BRN
and RED - GRY. However, the fan doesn't rotate. Am I missing
something?

Try 115 VAC H to the RED, N to GRY and WHT, and put an AC capacitor of a
few uF, 150 VAC or more in series with H to BRN. The direction will be
determined by whether WHT or BRN goes to the cap. However, the other wires
shouldn't show infinite resistance. This suggestion may not work but since you
already applied power without a meltdown, shouldn't do any worse.

Why didn't you save the other parts!!!?

--- sam | Sci.Electronics.Repair FAQ Home Page: http://www.repairfaq.org/
Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/
+Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm
| Mirror Site Info: http://www.repairfaq.org/REPAIR/F_mirror.html

Important: The email address in this message header may no longer work. To
contact me, please use the feedback form on the S.E.R FAQ Web sites.