4 TROUBLE SHOOTING GUIDE
(Refer to WIRING CONNECTION DIAGRAM.)
■
CHECK POINTS FOR ELECTRICAL PARTS.
< TROUBLE >
< CHECK >
NO
< REMEDY >
Does not operate.
→
<CHECK BATTERY PACK.>
→
Replace battery pack.
If no less than 7.2 V 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
7.2 V DC or the usable time is extremely short.
- the battery leaks. Check battery for leaks and terminals for corrosion.
↓
OK
NO
<CHECK TERMINAL CONNECTIONS BETWEEN MAIN UNIT AND
→
Repair contacts.
BATTERY PACK.>
Check for proper terminal contacts.
↓
OK
NO
<CHECK MICRO SWITCH.>
→
Replace micro switch.
(See WIRING CONNECTION DIAGRAM.)
1. When lever is slightly depressed;
* There should be continuity between (1) and (3).
* There is no continuity between (1) and (2) or (2) and (3).
2. When lever is not depressed;
* There should be continuity between (1) and (2).
* There is no continuity between (1) and (3) or (2) and (3).
NO
Does not
→
<CHECK VAROAB;ERESOSTAMCE.>
→
Replace variable
speedcontrol.
Disconnect white leae wire coming from variable resistance.
resistance.
●
There should be 50 ± 10k
Ω
between (A) and (C).
●
There should be 0 - 50 ± 10k
Ω
between (A) and (B).
↓
OK
NO
<CHECK MODULE.>
→
Replace drivingshaft
Disconnect blue lead wire coming from module, if it shows wave
or cam A.
form as follows with (-) terminal and blue lead wire connected to 7.2V DC.
↓
OK
NO
<CHECK FET CIRCUIT BLOCK.>
→
Replace FET circuit.
Check lead wire terminals. Disconnect lead wire.
↓
OK
NO
<CHECK MOTOR.>
→
Replace motor.
The motor normally operates with its white (+) and black (-) lead wires connected to
7.2 V DC.
Ref.: motor rotating speed 13,700-18,000.
6
EY3654
