Honeywell SYA14 Series Manual page 64

5.3 Troubleshooting Procedures
When the FF-SYA Series safety light curtains are working properly and the sensing field is not
interrupted, at least one of the emitter yellow LEDs R1, R2 and R3 is illuminated, the receiver
green LED «ON» is illuminated, and all other LEDs are NOT illuminated. If this condition is not
met, refer to the following troubleshooting chart, flow diagram and corresponding repair
procedures.
Troubleshooting Chart (see next figure for indicator information)
Symptom Probable Cause
All light emitting diode No power.
(LED) indicators are NOT
illuminated
The emitter red « test » Test input is open.
indicator and the receiver
red « OFF » operation
indicator are both
illuminated
The emitter red « alarm » Emitter is having a
indicator is flickering and failure
the receiver red « OFF »
operation indicator is
illuminated
The receiver red cross-talk Receiver is
indicator is « ON » and the receiving a signal
receiver red « OFF » from a second
operation indicator is emitter
illuminated
The receiver yellow signal Emitter and/or
strength indicator is receiver units need
flickering and the green to be cleaned
« ON » operation indicator Emitter and/or
is illuminated receiver units need
to be aligned
Emission power is
too low
The receiver yellow signal Emitter and/or
strength indicator is receiver units need
flickering and the red to be cleaned
« OFF » operation Emitter and/or
indicator is illuminated receiver units need
to be aligned
Emission power is
too low
64
Corrective Action
Ensure external fuse is not blown.
Ensure supply voltage and polarity
are correct (see Specifications).
Ensure electrical power connections
are secure and correct. (see
Electrical Connections chapter).
Ensure the external circuit wiring
connection between pins 4 and 5 on
the emitter connector is secure (see
Electrical Connections chapter,
Mutual Interference or Cross-talk).
Replace the emitter unit by a new
one of the same resolution and
protection height
Adjust the emission power of the
second emitter (see chapter
Installation)
Clean emitter lens, receiver lens
and mirrors (see Emitter and
Receiver Cleaning).
Align emitter, receiver and mirrors
Adjust the emission power of the
emitter (see Installation chapter,
Mutual Interference or Cross-talk)
Clean emitter lens, receiver lens
and mirrors (see Emitter and
Receiver Cleaning).
Align emitter, receiver and mirrors
Adjust the emission power of the
emitter (see Installation chapter,
Mutual Interference or Cross-talk)
107031-23 EN FR26 GLO 1199 Printed in France