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R7195A,B MOTOR POSITIONER
OPEN INPUT W.
YES
DID MOTOR
DRIVE AT
NORMAL
SPEED?
NO
REPLACE Q3.
CONNECT OPERATING
VOLTAGE. SHORT R-W.
MEASURE
AC VOLTAGE AT
TERMINALS 1 AND L2.
Fig. 11. Flowchart to troubleshoot output Triac switch circuits for 135-ohm potentiometer input.
63-2582
YES
DID MOTOR
DRIVE OPEN?
MEASURE
AC VOLTAGE AT
NO
TERMINALS L2 TO 1.
YES
DID MOTOR
DRIVE
CLOSE?
YES
SHORT TERMINALS
NO
B TO W.
IS VOLTAGE
LESS THAN
10V?
YES
IS OPERATING
VOLTAGE
NO
120V?
NO
10
TRIAC OUTPUT CIRCUIT IS OKAY.
YES
REPLACE OR TROUBLESHOOT
PRINTED WIRING BOARD USING
SCHEMATICS.
DID MOTOR
DRIVE AT
NORMAL
SPEED?
NO
REPLACE Q4.
YES
IS VOLTAGE
LESS THAN
10V?
NO
YES
DID MOTOR
DRIVE OPEN?
NO
REPLACE Q4, A5, R31, R32.
REPLACE Q4
REPLACE Q4.
YES
REPLACE Q3,
A4, R28, R29.
IS OPERATING
VOLTAGE
120V?
NO
REPLACE Q3.
REPLACE Q3.
REPLACE CR12
M20796
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