Yale 524150797 Maintenance Manual page 136

Electrical System Checks
Possible Causes:
1. Battery not connected.
2. Control fuse is damaged.
3. Key switch or brake switch is damaged.
4. Transistor controller connector unplugged.
5. Transistor controller is damaged.
1.0 Check for battery voltage on the battery
side of control fuse.
Check for battery voltage at control fuse
1.1
terminal of key switch.
1.3 Key switch closed. Brake switch closed.
Check for battery voltage at
B+ terminal of transistor controller.
4
Table 1. Voltage Checks
LIFT TRUCK WILL NOT MOVE IN EITHER DIRECTION.
NO FAULT IS DISPLAYED ON THE CONTROLLER.
→→
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-→
→→
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-→
→→
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1.01 Battery voltage at control fuse.
Check for open control fuse.
1.02 No battery voltage at control fuse. Connect
battery or check wiring between battery and
fuse.
Battery voltage at key switch. Check for
1.1.1
damaged key switch. Check connector.
1.1.2 No voltage at key switch. Wire to key switch or
connections is damaged.
1.3.1 Battery voltage at B+ terminal. Check fault code.
If no fault code, possible damaged control
handle card.
1.3.2 No voltage at B+ terminal. Check B- terminal.
Check fault code.
2200 YRM 1508