Hitachi RAS-10FSXN - 11 Electrical Checks of the Main Parts; Inverter; Inverter Specifications

11.1 Inverter
11.1.1 Inverter specifications
Applicable models RAS-8FSXN to RAS-18FSXN
Applicable power source 3 phase, 400 V ± 10%, 50 Hz
Maximum output voltage 380 - 415 V
Maximum output current 25 A
Control method Vector control PWM (Pulse width modulator)
Output frequency range 10 to 115 Hz
Frequency accuracy 0.01 Hz
Output / characteristics
Conditions:
1. Power source voltage 400 V AC.
2. Without a load (Free output).
(V)
400
380
300
200
100
0 5010 75 100 115
f (Hz)
N O T E
The characteristics are fluctuated due to the current minimize control.
Soft start and stop 0.125 Hz/s, 0.25 Hz/s, 0.5 Hz/s, 1 Hz/s, 3 Hz/s (5 steps)
Protection function:
Excessively high or low inverter voltage
Excessively low voltage in case the DC voltage is lower than 350 V.
Excessively high voltage in case the DC voltage is higher than 750 V.
Malfunction in the current sensor
Compressor current stoppage lower than 1.5 A
Cause of the malfunction:
• Sensor current failure.
•
Transistor module failure.
• Compressor failure.
• Disconnected wiring.
11 Electrical checks of the
main parts
330
SMGB0065 rev. 1 - 12/2010