Hitachi RAS-(4-6)HVRNS2E - Page 456

11 Electrical checks of
main parts
446
SMGB0064 rev.0 - 08/2011
Protection function
Applicable model RAS-(2-3)HVRN(S)2 RAS-(4-6)HVRNS2E
RAS-(8/10)HRNSE
RAS-(4-6)HRNS2E
Excessive high or low
voltage for inverter
Excessive low voltage at a voltage is lower than 194 V DC
Excessive high voltage at a voltage is higher than 400 V DC
(2/2.5/3HP) or 423 V DC (4/5/6HP)
Excessive low voltage at a voltage is
lower than 350 V DC
Excessive high voltage at a voltage is
higher than 750 V DC
Protection function
Abnormality of current
sensor (0A detection)
Stoppage at a current of compressor smaller than 1.5A.
When the frequency is 15 to 18Hz after starting (except 2 /2.5/3 HP: 6 to 10 Hz)
Cause of abnormality:
Failure of current sensor.
Failure of IPM (2/2.5/3/8/10 HP) or DIP-IPM (4/5/6 HP).
Failure of compressor/fan motor.
Disconnected wiring.
Overcurrent protection for
inverter
RAS-(2/2.5)HVRN2/RAS-3HVRNS2
(1)
(2)
(4)
10µs
50ms
30s
Time
Rated
Current
x 150%
Rated
Current
x 105%
RAS-(4-6)HVRNS2E
Time
Detecting current is more than
150% of the rated current.
Rated
current
x 150%
Rated
current
x 105%
RAS-(8-10)HRNSE / RAS-(4-6)HRNS2E
10ms
Current
50ms 30s Time
(1)
(2)
(3)
Rated Current of
Transistor Module (IPM)
Rated Current x 105%
(4)
1 Short-circuit trip of arm *)
2 Instantaneous overcurrent trip *)
3 Instantaneous overcurrent trip
4 Electronic thermal trip
Condition is maintained longer than 30 seconds or accumulated longer than 3 minutes during 10 minutes
sampling time.