4 TROUBLE SHOOTING GUIDE(Refer to WIRING CONNECTION DIAGRAM.)CHECK POINTS FOR ELECTRICAL PARTS.< TROUBLE > < CHECK > NO < REMEDY >Does not operate. → → Replace battery pack.If no less than 7.2 V DC is available across the (+) and (-) terminals, the batterypack is OK.Note:The battery pack is sold separately as an optional accessory. See the nearestsales dealer for details. The battery pack has a limited life. The pack should bereplaced if- after being charged for the rated charging time the battery voltage is less than7.2 V DC or the usable time is extremely short.- the battery leaks. Check battery for leaks and terminals for corrosion.↓ OKNO → Repair contacts.BATTERY PACK.>Check for proper terminal contacts.↓ OKNO → 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).NODoes not → → Replace variablespeedcontrol. Disconnect white leae wire coming from variable resistance. resistance. There should be 50 ± 10kΩ between (A) and (C). There should be 0 - 50 ± 10kΩ between (A) and (B).↓ OKNO → Replace drivingshaftDisconnect 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.↓ OKNO → Replace FET circuit.Check lead wire terminals. Disconnect lead wire.↓ OKNO → Replace motor.The motor normally operates with its white (+) and black (-) lead wires connected to7.2 V DC.Ref.: motor rotating speed 13,700-18,000.6EY3654
