Hitachi RAS-5HVRNM1E Service Manual page 233

8 Troubleshooting
RAS-(4-6)HRNM1E
Restart the operation
Is the power supply
voltage 400V ±10%?
Yes
Is the voltage over 340V
during the operation?
Yes
Does the voltage fall during
the operation because of the
operation of other apparatus?
No
Does LED201 on
ISPM is ON?
No
Is the connection between ISPM
and reactor (PCL) with capacitors
(CB1, 2) or CMC?
Yes
Is the DC voltage over
460V?
No
225
SMGB0060 rev. 1- 12/2010
No
No
Yes
How is the
Yes
compressor
operation?
No
Be extremely carefull because of the
high voltage
Yes
Check capacitors (CB1, 2)
Frequency can increase
higher than 60 Hz
Compressor stops
immediately (lower than
30 Hz)
Compressor stops when
frequency increases
(approx. 30 Hz to 60 Hz)
Faulty
Normal
Check the wiring and the
cable capacity
Faulty PCB3/ISPM
Replace PCB3/ISPM
Connect correctly
Replace the capacitors
Capacitors have high voltage.
Be extremely carefull *1)
Faulty ISPM
Replace ISPM
Check de wiring, ISPM and
the capacitors (CB1,2) *2)
In the case the wiring is
correct, replace ISPM
8