Honeywell SYA14 Series, Manual

Page: 199 / 737

37 107022-14 EN FR26 GLO 0100 Printed in Germany
If a protective safety equipment (FF-LS safety light curtains or machine safety control equipment monitored by the FF-LS)
failure occurs during self-check or test input, the protective safety equipment is locked in an OFF condition. This OFF
condition cannot be defeated by turning the power supply voltage OFF and ON.
Table 5-4 Troubleshooting Chart
Failure Possible cause Inspect and repair
•
Sensing field is clear, but the protective
safety equipment will not release after
actuation of an external reset push
button switch.
•
Green LED indicator is illuminated.
•
Open circuit between output relays
and machine control circuitry.
•
Inspect terminal wiring and, if
necessary, repair wiring.
•
Blown fuse at output relay terminals.
•
Replace fuse.
•
Sensing field is clear, but the protective
safety equipment will not release after
actuation of an external reset push
button switch.
•
Red LED indicator is illuminated.
•
Open circuit between both or one of
the sensing units and the control
unit.
•
Ensure correct terminal polarity
and proper cable connection
between the sensing and control
units.
•
Translucent surface of sensing units
are contaminated.
•
Clean surface.
•
Sensing unit is defective.
•
Replace sensing unit (matched
pair).
•
Faulty reset pushbutton or open
circuit.
•
Replace reset pushbutton or repair
wiring.
•
Sensing field is clear, but the protective
safety equipment will not release after
actuation of an external reset push
button switch.
•
No LED indicator is illuminated.
•
No supply voltage to the control
unit.
•
Inspect terminal wiring and, if
necessary, repair wiring.
•
Blown fuse at supply voltage
terminal.
•
Replace fuse. See fuse
replacement. (5.4.1)
•
During normal operation the red LED 5,
located near microprocessor on circuit
board in control unit (see figure 5-2),
pulses (illuminates) every 3 seconds.
•
If there is no release when the sensing
field is clear, the red LED 5 may:
•
Illuminate continuously
•
Faulty synchronization
•
Replace control unit.
•
Flicker one time
•
Faulty self test
•
Replace control unit.
•
Flicker two times
•
Faulty communication
•
Replace matched sensor units.
•
Visually inspect cable pair and
replace if required.
•
Flicker three times
•
Faulty communication sensor A
•
Visually inspect sensor cable A
and replace if required.
•
Flicker four times
•
Faulty communication sensor B
•
Visually inspect sensor cable B
and replace if required.
•
Flicker five times
•
Faulty installation parameters
•
Visually inspect compatibility of
sensor and control unit
components. Ensure the beam
number labels on all of the
components are the same.