Instruction Manual
FAC20
Rev 0
11
3.4
Fault Indications
Two possible fault indications may be shown on the FAC20
1.
If the “TEST” LED illuminates steady ON yellow as shown in Figure 10 below,
an open-circuit fault is detected on the External Trigger Input wiring to the
FAC20. Contact a licensed electrician to check the wiring.
Note: The monitoring resistor is 4.7K ohm.
Figure 10 Wiring fault of the external trigger
2.
If the “SILENCE” LED is steady ON yellow Figure 11 below, a firmware
corruption is detected in the FAC20. The unit needs to be replaced.
Figure 11 Firmware fault of FAC20
