Dräger Polytron C300 Gebrauchsanweisung Seite 20

en LED signals
9 LED signals
yellow, flashing slowly
alternating green and yellow
Constant green
flashes 300 sec. green
Constant yellow
flashing yellow
flashing green
alternating green and yellow
20
Electrical supply faulty or interrupted
Short circuit in supply cable
Overvoltage or undervoltage at the sensing
head
Incorrect voltage (e.g. 230 V AC) applied,
electronics damaged
Sensing head faulty
Sensor is warning up to be ready for
measurements, signal level 0 V
Normal operation
Concentration measurement in the test
window 40 ppm to 60 ppm, result of a test
with 50 ppm test gas
internal fault detected by electronics,
signal level 0 V
Measured concentration below -5 ppm, below
the measuring range, signal level 0 V
Measured concentration above 105 ppm
outside the measuring range
Age monitoring, sensor older than 3 years,
service life expired, see date on sensor
rating plate
Check installation for cable break. Check operation
of the power supply unit of the control unit. Check
electric voltage in the junction box or at the sensing
head with a multi-meter
Check installation for short circuit
Check operation of the power supply unit of the
control unit: Check electric voltage at the sensing
head with a multi-meter
Replace the sensing head
Replace the sensing head, contact supplier
No activity, flashing stops after max. 30 minutes
No activity, flashing stops after max. 5 minutes
Replace the sensing head
If the fault continues for more than 1 day replace
sensor
Ventilate with fresh air
Replace the sensor