Skyjack SJIII 3220 Operating & Maintenance Manual page 67

TROUBLESHOOTING INFORMATION
TROUBLE
NO DOWN OR REVERSE
ONLY FUNCTION FROM
PLATFORM CONTROLS
NO UP OR FORWARD
ONLY FUNCTION FROM
PLATFORM CONTROLS
NO UP FUNCTION
FROM PLATFORM OR
BASE CONTROLS (for
units not equipped w/
Tilt Cut-out option)
NO UP FUNCTION FROM
PLATFORM OR BASE
CONTROLS (for
machines equipped with
Tilt Cut-out options)
NO DOWN FUNCTION
FROM PLATFORM
CONTROLS
(CE Machines Only)
SJIII Series - The CONVENTIONALS
PROBABLE CAUSE
ELECTRICAL SYSTEM
1. Loose or broken wire "A" from
Proportional Controller (S7) to Lift/Drive
Switch (S5).
2. Lift/Drive Switch (S5) defective.
1. A/B Switch (S74) in Proportional
Controller open or defective.
2. Loose or broken wire "B" from
Proportional Controller (S7) to Lift/Drive
Select Switch (S5).
3. Lift Drive Select Switch (S5) defective.
1. Loose or broken wire #14 from Base
Terminal Block (TB-1) to Up Valve Coil
(3H-14)
2. Defective Up Valve Coil (3H-14)
3. Open Diode (D21).
4. Open Diode (D14).
1. Machines not level.
2. Loose or broken wire 19 from Base
Terminal Block (TB-1) to Tilt Switch
Fuse (F2).
3. Blown or defective Tilt Switch Fuse
(F2).
4. Defective Tilt Switch (TS1).
5. Loose or broken wire #28 from Tilt
Switch (TS1) to Tilt Relay (28CR).
6. Loose or broken wire #02 from Tilt
Switch (TS1) to Terminal Strip (TB-1).
7. Defective Tilt Relay (28CR).
8. Loose or broken wire #19A from Tilt
Relay (28CR) to Pump Motor
Contactor.
1. Loose or broken wire #13 from Base
Terminal Block (TB-1) to Lowering
Warning System Module (LWS1).
2. Defective LWS Time Delay Relay
(41CR).
3. Loose or broken wire #13A from
Lowering Warning System Module
(LWS1) to Base Terminal Block
1).
4. Loose or broken wire #13A from base
Terminal Block (TB-1) to Down Valve
Coil (2H-13A).
5. Defective Down Valve Coil (2H-13A).
6. Loose or broken wire #02 from Down
Valve Coil (2H-13A) to Base Terminal
Block (TB-1).
117128
Complete Revision 99-05-01
REMEDY
1. Check continuity.
defective.
2. Check Switch. Replace if defective.
1. Check switch. Replace if defective.
2. Check continuity.
defective.
3. Check switch. Replace if defective.
1. Check continuity.
defective.
2. Check continuity through coil.
Replace if defective.
3. Check diode. Replace if defective.
4. Check diode. Replace if defective.
1. Use on level surface.
2. Check continuity.
defective.
3. Check continuity.
defective.
4. Test Tilt switch. Replace if defective.
5. Check continuity.
defective.
6. Check continuity.
defective.
7. Check relay. Replace if defective.
8. Check continuity.
defective.
1. Check continuity.
defective.
2. Check relay. Replace if defective.
3. Check continuity.
defective.
(TB-
4. Check continuity.
defective.
5. Check continuity through coil.
Replace if defective.
6. Check continuity.
defective.
Replace if
Replace if
Replace if
Replace if
Replace if
Replace if
Replace if
Replace if
Replace if
Replace if
Replace if
Replace if
SECTION 4, Page 3