Siemens 7MB1420, Instruction Manual, Page: 30 / 74

9.2.2 Faults
The symbol precedes each fault.
The LED “not ready” flashes on the control panel. One of the following error messages appears
when you press “ENTER”.
Number
in display
1
2
3
4
8
9
19
40
41
42
43
44
45
46
47
Error message
Slave faulty
Hardware fault
Heating has switched off
EEPROM jumper must be set
Parameter storage test not carried out
EPROM faulty
Sensitivity too low
Oven temperature outside limits or Pt100
faulty
Pump temperature outside limits or Pt100
faulty
Sample gas probe temperature outside
limits or Pt100 faulty
Sample gas line temperature outside limits
or Pt100 faulty
Flame monitor faulty
Flow sensor temperature outside limits or
Pt100 faulty
Flow outside limits or sensor faulty
Sample gas pressure too high or too low or
pressure sensor faulty
Comment
Pull mains plug immediately,
inform service
Inform service
RESET
Inform service
See
u
8, next page but one
Order replacement from
manufacturer
Incorrect calibration gas,
incorrect measuring range,
see functions 2 and 6
Check contacts
Check contacts
Check contacts
Check contacts
Check contacts
Check contacts
Check contacts
Check cylinder pressure,
readjust, check pressure sensor
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