4 TROUBLESHOOTING GUIDE
(Refer to WIRING CONNECTION DIAGRAM)
< TROUBLE >
Does not operate.
→
<CHECK >
<CHECK BATTERY PACK.>
If no less than 12V DC is available across the (+) and
NOTE: The battery pack is sold separately as an optional accessory. See the nearest sales dealer for details. The battery pack has a limited life.
The pack should be replaced if;
-after being charged for the rated charging time the battery voltage is less than 12V DC or the usable time is extremely short.
-the battery leaks. Check battery for leaks and terminals for corrosion.
↓OK
<CHECK TERMINAL CONNECTIONS BETWEEN MAIN UNIT
AND BATTERY PACK.>
Check for proper terminal contacts.
↓OK
<CHECK SWITCH BLOCK.>
(See WIRING CONNECTION DIAGRAM.)
Check continuity between following terminals.
*Inspection of the forward / reverse selection switch. When switch handle is depressed all the way:
-There should be 0Ω between (A) - (D) , and between (B) - (C) ; when switch lever is set to forward side.
-There should be 0Ω between (A) - (C) , and between (B) - (D) ; when switch lever is set to reverse side.
*Inspection of the brake.
When switch handle is not depressed:
-There should be 0Ω between (A) - (B) .
↓OK
<CHECK MOTOR BRUSH.>
A.Check the condition of carbon brush.
(Do not touch between brush holder and holding spring.)
B.There should be 0Ω between motor lead wire and terminal of brush holder.
↓OK
<CHECK MOTOR ROTOR.>
Check the condition of rotor if there is any wear, crack and deformation.
↓OK
<REMEDY >
NO Replace battery pack.
→
NO Repair contacts.
→
NO Contacts in switch block
→are defective. Replace switch & FET block.
NO Replace motor
→brush assembly.
NO Replace motor
→rotor assembly.
<CHECK MOTOR STATOR.>
Check the condition of motor case if there is any crack and deformation.
NO Replace motor
→stator.
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