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Siemens E382 EH81E 061 01 03 02 Service Manual page 44

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Troubleshooting
Malfunction
The compressor stops; the mains power
lamp stays on:
Operating pressure (shown on the mano-
meter) is correct during functional check but
drops when a ventilator is connected:
The pressure alarm is activated:
Check of cooler temperature switch
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Siemens-Elema AB
Action
• The thermal switch inside the motor may
have tripped.
115 V version: The thermal switch on the
motor must be reset manually.
230 V version: The thermal switch will
reset automatically and the motor will
restart.
• Too high air consumption. The compressor
cannot supply the equipment connected.
• The dust filters or the air inlet filter are
clogged. Clean or replace the filters if
necessary.
• Check the operation of the compressor.
Overhaul or replace it if necessary.
• Too high air consumption. The compressor
cannot supply the equipment connected.
• Inspect the internal compressed air tubing.
Clear obstructions, tighten loose connec-
tors and/or replace faulty components.
• The dust filters or the air inlet filter are
clogged. Clean or replace the filters if
necessary.
• Pressure alarm function faulty. Replace
low pressure switch and/or control section
PC board if necessary.
• Check the operation of the compressor.
Overhaul or replace it if necessary.
• The thermoelectric cooler is clogged with
ice due to malfunction in the cooler. Check
the function of the cooler temp. switch:
– Connect a voltmeter between the cooler
connection cables at terminal 6.
– Make sure that the voltage to the cooler
switches between approx. 0 V and 12 V.
Normal switch cycle is approx. 1 min
when no compressed air is consumed.
Replace the cooler if necessary.
Compressor Compact
E382 EH81E 061 01 03 02

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