To Check The Insulation Resistance Of The Compressor - Daikin VRV IV Q+ Series Installer And User Reference Manual

19 | Electrical installation

19.7 To check the insulation resistance of the compressor

Installer and user reference guide
118
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NOTICE
If, after installation, refrigerant accumulates in the compressor, the insulation
resistance over the poles can drop, but if it is at least 1 MΩ, then the unit will not
break down.
▪
Use a 500 V mega-tester when measuring insulation.
▪
Do NOT use a mega-tester for low voltage circuits.
1 Measure the insulation resistance over the poles.
If
≥1 MΩ
<1 MΩ
2 Turn ON the power and leave it on for 6 hours.
Result: The compressor will heat up and evaporate any refrigerant in the
compressor.
3 Measure the insulation resistance again.
Insulation resistance is OK. This procedure is
finished.
Insulation resistance is not OK. Go to the next step.
Then
RXYQQ8~20U7Y1B
VRV IV Q+ series heat pump
4P546229-1A – 2020.10