(Refer to WIRING CONNECTION DIAGRAM)
4 TROUBLESHOOTING GUIDE
< TROUBLE >
< CHECK >
< REMEDY >
Does not operate.
<CHECK BATTERY PACK.>
NO Replace battery pack.
→
If no less than 18V DC is available across the (+) and (-) terminals,
→
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 18V 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
NO Repair contacts.
AND BATTERY PACK.>
→
Check for proper terminal contacts.
↓
OK
<CHECK SWITCH BLOCK.>
NO Contacts in switch block
(See WIRING CONNECTION DIAGRAM.)
→
are defective.
Check continuity between following terminals.
Replace switch & FET
* Inspection of the forward / reverse selection switch.
block.
When switch handle is depressed all the way:
- There should be 0
Ω
between (A) - (D) , and between (B) - (C) ;
when switch lever is set to forward side.
- There should be 0
Ω
between (A) - (C) , and between (B) - (D) ;
when switch lever is set to reverse side.
↓
OK
<CHECK MOTOR.>
NO Replace motor.
The motor normally operates with its white (+) and black (-) lead wires
→
connected to 18V DC.
Does not speed-
<CHECK FET.>
NO Repair the contact
control.
Even if FET block is defective, it can not be replaced individually.
→
or replace switch
Replace whole switch block.
& FET block.
Remove the FET circuit block and check the lead wire terminals.
These terminals are open normally when there is an open circuit (
Ω
)
between the green and yellow lead wires, and between the blue and
yellow lead wires.
NOTE:
* FET is weak against static electricity.
** The resistance value may be some differences depends on the
measurement range.
7
EY6950-X8
