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4 TROUBLESHOOTING GUIDE
(Refer to WIRING CONNECTION DIAGRAM)
< TROUBLE >
Does not operate.
→ If no less than 12V DC is available across the (+) and (-) terminals,
<CHECK BATTERY PACK.>
the battery pack is OK.
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.
<CHECK TERMINAL CONNECTIONS BETWEEN MAIN UNIT
Check for proper terminal contacts.
<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 (B) - (D) ,
when switch lever is set to forward side.
- There should be 0Ω between (A) - (D) ,
when switch lever is set to reverse side.
<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.
<CHECK MOTOR ROTOR.>
Check the condition of rotor if there is any wear, crack and deformation.
<CHECK MOTOR STATOR.>
Check the condition of motor case if there is any crack and deformation.
< CHECK >
↓OK
AND BATTERY PACK.>
↓OK
↓OK
↓OK
↓OK
5
EY7201-X8
< 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.
NO Replace motor
→
stator.
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