Dräger Regard 3900, Инструкция по эксплуатации, Страница: 76 / 292

,QVWUXFWLRQVIRUXVH
_ REGARD
®
3900
_ Fault elimination and messages
7.2 Fault with the Polytron remote sensor transmitter
Polytron warning signal
The Polytron transmitter warning signal (every 10 seconds, 1 second long 3 mA)
triggers the fault relay (F1) on the input module if the alarm threshold is set above
2.9 mA. If the fault relay is non-latching, the relay changes its status temporarily
Control unit displays
a different gas value
than the remote sen-
sor transmitter Faulty transmitter calibration Re-calibrate
Faulty input channel calibra-
tion Re-calibrate
Input channel range set
incorrectly Set the same range for the
input channel as for the
transmitter
The "Fault (F)" LED
lights up (constantly)
or flashes when a
channel is inactive Configuration error Move the inhibit switch to
position 1, then move back to
position 0
Ingress of water Faulty sealing Check the sealing ring of the
cover, cable entries and the
front label and repair
Output module fault Cause Remedy
No signal from all
outputs; green LED
does not light up No power supply to the mod-
ule Check ribbon cable to the
module and repair/replace
Faulty output module Replace output module
No signal from all or
some of the outputs;
green LED lights up Wrong channels selected on
the output module Place the jumper on the cor-
rect connections of the out-
put module
The output is con-
stantly at 1 ± 0.3 mA. No signal from the input
modules Check ribbon cable and con-
nect/repair
Faulty output module Replace output module
Output constant, but
gas value on display
changes Alarms locked Move inhibit switch back to
position 0
Output signal is too
low or less than
20 mA Load resistance too high Reduce load resistance
Fault Cause Remedy
Transfer of configu-
ration to or from the
control unit not possi-
ble No power supply to control
unit Check the external supply
and the wiring and repair
Faulty interface unit (RS-
232) Check the interface unit and
repair/replace
Display shows a
failed calibration Faulty remote sensor trans-
mitter Check the transmitter wiring
and repair and re-calibrate
Fault Cause Remedy