Troubleshooting - ABB SCC-E Operator's Manual

Troubleshooting

Problem
Feed unit not
working
Drops of
condensate in the
condensate monitor
or flow monitor
(liquid alarm)
Sample gas flow
insufficient (flow
alarm)
Cooler not working,
temperature
indicator off
Temperature
indication > 3 °C
Temperature
indication = 1999
Temperature
indication = room
temperature,
LED K1 lights up
constantly
22
Cause
Power supply interrupted
Fuse blown
Pump motor blocked
Defective pump
Defective diaphragm
Condensate being
produced by the gas
analysis system
Fluid from the process
penetrating
Cooler unit's condensate
collecting vessel full
Upstream sample gas pipe
or modules blocked or
sealed off
Downstream modules
blocked or sealed off
Negative pressure on the
gas sampling side
Positive pressure in the
waste gas pipe
Fuses blown
Power supply defective
Fan defective
Ambient temperature
> 45 °C
Sample gas flow too high
Temperature sensor
defective
Transistor T1 BUZ11
defective
SCC-E Sample Gas Feed Unit Operator's Manual
Remedy
Reconnect the power supply.
Replace fuse (2 A T).
Remove blockage.
Replace pump.
Replace diaphragm (see page 18).
1. Check operability of the upstream condensate
separation device, and rectify cause.
2. Empty, clean and dry the upstream sample gas
pipe and sample gas conditioning units.
3. Empty, clean and dry the condensate monitor.
4. Replace filter diaphragm.
5. 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.
Check fuses F1 and F2.
Check voltage at filter capacitors C1 and C2.
Check fan and replace if necessary.
Check ambient temperature.
Reduce sample gas flow.
Disconnect white leads and measure the Pt100 sensor
resistance: 107.79 + 0.4 Ω at ambient temperature =
+20 °C. Replace sensor when deviations are larger.
Check Peltier element voltage at terminals X2-3 and
X2-4 (see circuit diagram on page 26): Voltage >
13 VDC ⇒ transistor defective; replace transistor T1.
42/23-58 EN Rev. 1