Dräger Polytron 7500 Instructions For Use Manual page 30

Fault – Cause – Remedy
Warning number Cause
# 120 The sensor has been exposed to an exces-
sively high gas concentration for a long
period.
# 131 Bad sensor, no longer operating.
# 132 Electrolyte liquid evaporates. Measure-
ments are no longer possible.
# 135 Information such as the Part No. and the
Serial No. is not available.
Fault Cause
LED » « lights The pyrolysis oven is defect
red
LED » « lights Fault in measurement branch –
red pump measurement branch defect
LED » « flashes An internal flow test is being carried out –
red this is not a fault
LED » « lights Fault in principal branch –
red pump principal branch defect
All three LEDs Electronic defect
» «, » « and
» « lights or
flashes red
Page 30 of 72 Pages
Remedy
Reduce the exposure to high gas concentrations. If the
problem persists, fit a new sensor, page 23.
Replace the sensor, page 23.
If the problem persists, fit a new sensor, page 23.
Disconnect the unit from the mains and restart it.
If this error occurs again: Have the Polytron 7500 checked
by DrägerService.
Remedy
Replace the pyrolysis oven, page 26.
Check the hose connections for blockages.
Replace the pump, page 25.
– – –
Check the hose connections for blockages.
Replace the pump, page 25.
Polytron 7500 to be repaired by Service of Dräger Safety.
9023927 - 2nd edition - May 2007