EST EST3X - 3-IDC8;4 Initiating Device Circuit Module Troubleshooting; 3-OPS Off-Premises Signal Module Troubleshooting

Chapter 7: Service and troubleshooting
EST3X Technical Reference Manual 179
3-OPS Off-Premises Signal module troubleshooting
Table 45: 3-OPS Off-Premises Signal module troubleshooting
Problem
Possible cause
The module is in
trouble state • The master box circuit is open or not reset
• The reverse polarity circuit is open
• A 3.6 kΩ EOL resistor is not installed on unused circuits
The r
emote receiver indicates
a
loop trouble and does not
receive
an alarm
• The circuit polarity is reversed
• A circuit is open
• There is excessive circuit resistance
• A receiver is incompatible
• The module is defective
The r
emote receiver does not
indicate
a loop trouble and
does not receive
an alarm
• The module is not defined in the 3-SDU
• A receiver is incompatible
• The module is defective
3-IDC8/4 Initiating Device Circuit module
troubleshooting
Table 46: 3-IDC8/4 Initiating Device Circuit module troubleshooting
Problem
Possible cause
The m
odule is in trouble state • A 4.7 kΩ EOL resistor is not installed on unused IDC circuits
• A 15 kΩ EOL resistor is not installed on unused NAC circuits
• There is no communication with the CPU module
• The module is not defined in the 3-SDU
• The field wiring connector is not plugged into the module
NAC
output is not working • The jumpers are installed incorrectly
• An external source is configured but not connected
• The circuit is overloaded
• The circuit is silenced
• The circuit is shorted
• A polarized device is defective or reversed on the circuit
• Output was not programmed