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