Siemens 7MB1420, Instruction Manual, Page: 31 / 74

Number
in display
48
49
50
51
52
53
54
55
56
57
60
61
Error message
Hydrogen pressure too high or too low or
pressure sensor faulty
High-voltage outside limits
Operating voltages outside setpoints
Flow too high
Flow too low
Oven temperature setpoint exceeded or
fallen below
Pump temperature setpoint exceeded or
fallen below
Heated line temperature setpoint exceeded
or fallen below
Sample gas probe temperature setpoint
exceeded or fallen below
Combustion air/sample gas pressure too low
Flame does not ignite (30 min)
Pump does not start
Comment
Check cylinder pressure,
readjust, check pressure sensor
Check whether high-voltage line
is connected
Check power supply and con-
nections on transformer
Check outlet restrictor,
examine for leaks
Filter contaminated,
pump faulty,
line blocked
Combustion air line interrupted
Check gas flows
Check sample gas pressure
(380 to 390 mbar without pump)
31