Alliance Laundry Systems BU170S Service Manual Page 103

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70422201R1
101
LED OPL and UniLinc Troubleshooting
59.Rotation Sensor Error
UniLinc Error Display: Rotation Sensor Error
LED OPL Error Display: E rot
TMB2392S
Is the gap from the pulley to
sensor less than 1/4 inch?
Is there a constant 12
volts of DC at H6-1 to H6-3?
Adjust the gap to
less than 1/4 inch.
No
Yes
Yes
Yes
No
While turning
the basket by hand
slowly, is there 12 volts DC
at H6-3 to H6-2 when the pulley
spoke is in front of sensor and
0 volts DC as pulley spoke
clears sensor?
No
(1)
(2)
(3)
NOTE: The following checks are DC
voltage checks.
Replace harness and/or
sensor. If still not present,
replace front-end control (AP2).
Replace harness and/or
sensor. If still not present,
replace front-end control (AP2).
Replace harness and/or
sensor. If still not present,
replace front-end control (AP2).
TMB2392S
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