Robin America R1200 Service Manual page 92

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Ez
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Symptoms
Possible
q
causes
Checking
method
checking
criteria
Remedies
-.. -
Stator sub.coil
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Rotor Rotor Slip ring Slip ring
1
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Short circuit of the coil Short circuit of the coil
Short circuit of the coil Short circuit of the coil
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I. Contamination of the I. Contamination of the
brush's contact surface brush's contact surface
2. Abnormal abrasion of the 2. Abnormal abrasion of the
brush's contact surface brush's contact surface
Measure resistance between
the terminals with a circuit
tester
(Measure with a 6P coupler)
I
In case the measured resis-
tance is lower than 15% of
the standard, it suggests a
short circuit.
/
Measure resistance between
the terminals with a circuit
tester
(Measure with a 6P coupler)
In case the measured resis-
tance is lower than 15% of
the standard, it suggests a
short circuit.
Measure resistance value
between the slip rings with
a circuit tester
1. In case the resistance is
lower than 553, it suggests
short circuit
2. In case the measured
resistance is more than
1452, check the slip
rings.
Confirm condition of the
brush's contact surface
1. If the brush's contact
surface is contaminated,
clean it.
2. In case of abnormal abra.
sion, replace it.