Protection function
Applicable model RAS-(2-3)HVRN1(E)(S) RAS-(4-6)HVRNS1E RAS-(8/10)HRNSE
Protection of IPM
IPM has four protection function for self-protection.
1 Some of the output terminals between "U" and "V", "V" and "W", "W" and "U" has a short-
circuit.
2 Running current reaches the maximum rated current.
3 Abnormal temperature is measured by internal thermistor.
4 Control voltage decreases abnormally.
Overload control
Overload control as a current greater than (rated current X105%).
Overload control release at a current smaller than (rated current X 88%).
Fin temperature
increase
The unit is stopped when the fin temperature is higher than 80 ºC (1 Phase) 100 °C (3 Phase).
Earth detection The unit is stopped when the compressor is earthing.
11 Electrical checks of
main parts
441
SMGB0060 rev. 1- 12/2010
11
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