Troubleshooting Procedures - Honeywell FF-SB12 Series Installation Manual

Troubleshooting Procedures

When the FF-SB Series safety light curtains are working properly and the sensing field is not interrupted, the
emitter LEDs E1 and E2 (yellow) are both illuminated, the receiver LED R3 (green) is illuminated, and all
other LEDs are NOT illuminated. If this condition is not met, refer to the following troubleshooting chart, flow
diagram (see figure 4-3) and corresponding repair procedures.
Troubleshooting Chart
Symptom Probable Cause
E1: ON / E2: ON Relay contact stuck in
R1: ON / R2: ON the closed condition.
R3: ON / R4: flickers.
All light emitting diode No power.
(LED) indicators are
NOT illuminated.
LED E1, E2, R1, R2 Test input is open.
and R4 are illuminated.
LED E1 and R2 are Sensing field may be
illuminated, R4 and E2 obstructed.
are NOT illuminated. Emitter and/or receiver
units need to be
cleaned.
Emitter and/or receiver
units need to be
aligned.
Emitter and/or receiver
unit internal error.
LED E1, E2 and R2 Light curtain is in cycle
are illuminated, R4 is start mode.
flickering.
LED E1, E2 and R3 Emitter and/or receiver
are illuminated, R1 is units is contaminated.
flickering. Emitter and/or receiver
units is misaligned.
Random alarms Line voltage transients
without apparent cause greater than IEC 801-4
(i.e., erratic outputs, Norm standard.
flickering LEDs). Unacceptable ambient
LEDs E1, E2 and R3 External relays may
are NOT illuminated, or not be working.
other LEDs are
illuminated.
60
(see figure 4-2 for indicator information)
Immediately, exchange the relay board (see chapter 8.4).
Ensure fuse is not blown (see Fuse Replacement procedure).
Ensure supply voltage is correct; as specified (see Specifications).
Ensure electrical power connections are secure and correct (see
Electrical Connections chapter).
Ensure the external circuit wiring connection between pins C4 and B3
on the receiver connector is secure (see Electrical Connections
chapter).
Remove obstacles interrupting sensing field.
Clean emitter lens, receiver lens and mirrors (see Emitter and Receiver
Cleaning).
Align emitters, receiver and mirrors.
Replace emitter and/or receiver unit.
Ensure monitoring loop connections between pins C3 and C5 are
secure. (see Electrical Connections chapter).
Press cycle-start push-button.
Clean emitter lens, receiver lens and mirrors (see Emitter and Receiver
Unit Cleaning section).
Align emitters, receiver and mirrors.
Ensure the correct supply voltage is provided (see Electrical
Connections chapter).
Ensure RC elements on the inductive loads are present (see Electrical
Connections chapter).
connector are secure (see Electrical Connections chapter).
Ensure ground connection on emitter and receiver are secure (see
Electrical Connections chapter).
Use a special optical filter (see Order Guide).
Refer to system wiring diagram and ensure the external relays
connected to or linked with the safety light curtain are operating
properly (see Electrical Connections chapter).
Corrective Action
107062-12 EN FR26 GLO 501 Printed in France