CHAPTER 9: MALFUNCTIONS
ALPHA ST 320
9-7
1.18 Alarm 19 – Guiding Channel Malfunction Closing
e 1 9 : G U I D I N G C H A N N E L
Alarm19:
M A L F U N C T I O N C L O S I N G !
Description :
Limit switches SQ5 (open position) and SQ3 (close position) are both activated at
the same time.
Solution :
Check the adjustment of the limit switches.
Check that the switches function. Replace if necessary.
Check wiring of limit switches to PLC.
1.19 Alarm 21 – SQ3 is Malfunction
e 2 1 : S Q 3 I S
Alarm21:
M A L F U N C T I O N
Description :
This alarm automatic occurs when during the production cycle, the guiding
channel closed switch (SQ3 – I 0.4) turns off.
Solution :
Check the adjustment of limit switch SQ3 and the wiring to the PLC.
1.20 Alarm 22 – Guiding Channel Malfunction Opening
e 2 2 : G U I D I N G C H A N N E L
Alarm22:
M A L F U N C T I O N O P E N I N G !
Description :
Guiding channel could not open within the time limit.
Solution :
Check limit switch SQ5.
Check air pressure and valves of cylinder.
Check for mechanical obstacle preventing the guiding channel from opening.
1.21 Alarm 23 – Default Prior to Open Guiding Channel
e 2 3 : D E F A U L T P R I O R T O
Alarm23:
O P E N G U I D I N G C H A N N E L
Description :
The open position limit switch gives a signal before the channel open.
Solenoid (YV2A) is activated
Solution :
Check position and function of limit switch SQ5.
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