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Reference
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TROUBLESHOOTING
999 SERVICE/MAINTENANCE MANUAL
10-42
Published 05-16-17, Control # 233-03
Test 10 – Checking Voltage at the Speed Encoders
Testing the boom hoist or load drum speed encoder for
correct voltages requires a standard test adapter (can be
ordered from the Manitowoc Crane Care Lattice Team) and a
digital multi-meter.
To test incoming power at desired speed encoder:
•
Engine must be off and power on, with all brakes and
locks engaged.
•
Disconnect the output cable from the speed encoder
connector.
•
Install the test adapter to the encoder.
•
Connect the test adapter red (positive) and black
(negative) to digital multi-meter jacks.
•
Start engine with all brakes and locks engaged.
•
The motor or drum should remain at rest.
•
Check for 12 volts DC.
•
If this reading is not obtained, check the 5 amp F8 fuse
at the fuse panel (see Test 6).
To test voltage output from the speed encoder to the PC:
•
Engine must be off and power on, with all brakes and
locks engaged.
•
Connect green (positive) and black (negative) wires to
digital multi-meter jacks.
•
Check for 0.00 or 7.40 volts DC with motor or load drum
at rest.
•
With the motor or load drum enabled, check for 3.5 to
3.9 volts DC.
•
If these readings are not obtained, check the encoder
drive assembly and wiring.
Item
Description
1
Encoder
2
Test Adapter
3
Adapter Cable Connections
3
P1594
2
1
Load Drum Shown
Содержание 999
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Страница 173: ...R e f e r e n c e O n l y Manitowoc Published 05 16 17 Control 233 03 4 19 999 SERVICE MAINTENANCE MANUAL BOOM 4 ...
Страница 174: ...R e f e r e n c e O n l y BOOM 999 SERVICE MAINTENANCE MANUAL 4 20 Published 05 16 17 Control 233 03 ...
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