Check compressor resistances
Split ODU – 6 720 817 722 (2015/06)
34
3 Check compressor resistances
To check the resistance of the compressor:
▶ Disconnect the compressor motor plug
▶ Measure the resistance between each coil and ground
▶ The resistance should be more than 2M (at 20 °C)
To check the resistance between the coils:
▶ Disconnect the compressor motor plug
▶ Measure the resistance between the coils
▶ The resistance should be equal
Fig. 32 Check compressor resistances
[1] Compressor
[2] Copper pipe
WARNING: Electric shock!
▶ Even if the ODU is disconnected from power supply,
it takes some time to discharge the remaining
electricity of the electrolytic capacitor. Before
conducting a service or repairing job, switch off the
main power supply and make sure that all LED on the
circuit boards are off.
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2
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6 720 817 722-33.1I
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