Siemens KG39EAI43 - Checking compressor (quick test)

7.3 Checking compressor (quick test)
Required tools:
Multimeter Digital multimeter VC 850K [15000062]
Prerequisite:
Compressor is running.
7.3.1 Checking compressor input current
1. Switch off the appliance.
2. Wait 10 minutes for pressure to equalize.
3. Actuate the compressor in the internal test program.
4. Measure compressor input current.
5.
If compressor input current is in the range 0.1 A - 1.1 A.
- Check speed on the inverter module.→Page 52
6.
If compressor input current > 1.1 A.
- Check resistance values of compressor motor windings.→Page 52
7.3.2 Checking speed on the inverter module
Compressor speeds changes in three stages.
¡ Electronics emit pulses to change the speed.
¡ Control device (inverter module) converts pulses for compressor.
¡ Compressor implements different speeds.
Speeds alternating after 20 s:
¡ Low: 1215 Hz - 39 Hz
¡ Medium: 2500 Hz - 84 Hz
¡ High: 4500 Hz - 150 Hz
1. Check if compressor changes speed in three stages.
2.
If speeds do not change in three stages.
- Replace the inverter module.
7.3.3 Checking resistance values of compressor motor windings
1. Check resistance values of all three compressor motor windings.
2.
If compressor motor windings resistance values are equal.
- Replace inverter module.
3.
If compressor motor windings resistance values are not equal.
- Replace compressor.
Test
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