Happy HCS-1201-30, Maintenance Manual

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Trouble shooting(Suspension of upper shaft)
7-2-8
Trouble Factor Cause of trouble and measure Page
Suspension
Mechanical
1. Upper thread twine round rotary hook or rotary hook retainer.
of main shaft 1-1 Get rid of it.
(E-18) 2. Check return of keeper goes smooth. (when start sewing.)
(E-51) 2-1Adjust it regularly.
(E-52) 3. Check upper thread is sticking at thread guide part of bobbin case.
3-1 Get rid of it.
3-2 Do not use of bobbin case in which thread guide is coiled type.
(use standard type)
4. Out of Needle bar block B from pressure foot block.
4-1 Insert needle bar block B into pressure foot block by doing
needle bar change manually.
4-2 Clean and overhaul of Jump solenoid.
5. Defect on drive part of pressure foot.
5-1 Modify Pin B and hit part of link A and B by sand paper.
5-2 Replace of pressure foot block ass’y and link ass’y.
6. Effect by breakage of parts.
6-1 Repair broken place.
7. No damage in electric parts?
7-1 Replace of CPU board.
7-2 Replace of Timing Board.
7-3 Replace of inverter.
8. Trouble of software in CPU circuit board. (11-1)(11-2)
8-1 Initialize, then make automatic speed setting. 5-2-1
9. Trouble in control of number of revolution. (11-1)
9-1 Make automatic speed setting. 5-3-1
Operator 1. Isn't foreign stuff such as thread or cloth caught in where revolution is driven.
1-1 Get rid of foreign stuff.
1-2 Stretch properly. (6-2) (7-5)
2. Isn't thread tension too strong (stop at time of action of thread cut)? (4-5) (8-1)
2-1 Weaken tension so as not to cause trouble in sewing rhythm.
3. Check condition of lubrication.
3-1 Lubricate (refer to message)
Environment
1. Check adequate level of voltage (refer to trip of inverter).
1-1 Supply rated voltage.
100V – 115V -10V / +15V
200V – 230V -10V / +10V
( ) ----- Reference instruction book