Model 9600/9700 Swing-Reach ® Lift Truck
Section 5. Troubleshooting Electrical Troubleshooting
To test, measure the resistance from the FGND screw to any piece of bare metal on the frame with a DMM. Resistance should be <0.5 ohm.
Inrush Protection A resettable fuse protects the VM battery sense circuit and can be reset by turning the truck OFF momentarily. Opening of the fuse will frequently manifest as an FH code along with other F-series codes. NOTE: This test should be performed after the truck has had a chance to come to room temperature. To test, remove JPF4 from the Fuse/Relay Card. Measure the resistance from PF4-1 to PF4-7. Resistance should be approximately 1.3 ohms. Replace the Fuse/Relay Card as necessary.
DC Motors Types of DC Motors There are two primary types of DC Motors:
Input Diodes NOTE: Remove connectors JP1 thru JP4 before performing this test.
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Figure 5-7.
To test the relay coil input diodes, locate CR5 and CR6 on the Fuse/Relay Card. Using a DMM set to the “diode” function, measure the voltage by putting the black probe on the banded (right) side of the diode and the red probe on the nonbanded (left) side. Voltage should be approx. 0.5V across each diode. An open circuit will be displayed if the diodes are tested in the reverse direction. Replace the Fuse/Relay Card as necessary.
Series-Wound Motor Circuit Series Wound Motor
S/D
MP A •
Publication: 1089040, Issued: 08 Apr 2016
A series-wound motor has only two external connections because the armature and field windings are connected internally.
A permanent magnet motor has two external connections. The field is produced by an internal magnet.
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