Troubleshooting - ABB SCC-S Operator's Manual

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Troubleshooting

Problem Cause
Sample gas feed unit Power supply interrupted
not working
Fuse blown
Pump motor blocked
Defective pump
Defective diaphragm
Drops of condensate in Condensate being produced
the condensate monitor by the gas analysis system
or flow monitor (liquid
Fluid from the process
alarm)
penetrating
Sample gas cooler's
condensate collecting vessel
full
Sample gas flow Upstream sample gas line or
insufficient (flow modules blocked or closed
alarm)
Downstream modules blocked
or closed
Negative pressure on the gas
sampling side
Positive pressure in the waste
gas pipe
Cooler not working,
Fuses blown
temperature indicator
off
Temperature Power supply defective
indication > 3 °C
Fan defective
Ambient temperature
> 45 °C
Sample gas flow too high
Temperature Temperature sensor defective Disconnect white leads and measure the Pt100 sensor
indication = 1999
Temperature Transistor T1 BUZ11
indication = room defective
temperature, LED K1
lights up constantly
Corrective Action
Reconnect the power supply.
Replace fuses.
Remove blockage.
Replace pump.
Replace diaphragm (see section"Replacing the
Diaphragm and Valve Plates in the Diaphragm Pump",
page 24).
Check operability of the upstream condensate
separation device, and rectify cause.
Empty, clean and dry the upstream sample gas pipe and
sample gas conditioning units.
Empty, clean and dry the condensate monitor.
Replace filter diaphragm.
Press reset switch on the front panel to deactivate the
condensate lock.
Remove blockage or open modules.
Remove blockage or open modules.
Rectify negative pressure.
Rectify positive pressure.
Replace fuses.
Check voltage at filter capacitors C1 and C2.
Check fan and replace if necessary.
Check ambient temperature.
Reduce sample gas flow.
resistance: 107.79 + 0.4  at +20 °C ambient
temperature. Replace sensor when deviations are
larger.
Check Peltier element voltage at terminals X2-3 and
X2-4 (see section "Circuit Diagrams", page 35):
Voltage > 13 VDC  transistor defective; replace
transistor T1.