8 Troubleshooting
226
SMGB0064 rev.0 - 08/2011
RAS-(8-12)HRNM
Faulty PCB2. Replace it
Faulty PCB2. Replace it
Check the Wiring PCB2 and
capacitors CB.
In case the wiring is correct,
replace the PCB2.
Compressor stops
immediately (lower than
20 Hz)
Compressor stops when
frequency increases
(Approx. 20 Hz to 60 Hz)
Is the power supply voltage
380V ±10% or 415V ±10%
No
Yes
Is the voltage over 323V during
operation?
Does the voltage fall during
the operation because of the
operation of other apparatus?
Does LED021 on PCB2
ON after compressor’s
electromagnetic switches
(CMC) turn ON?
Is connection correctly
between IPM and capacitors
(CB1 and CB2), DCL or CMC?
Is the DC voltage over 460V?
Frequency can increase
higher than 60 Hz
How is the
compressor
operation?
Connect correctly
Check capacitors (CB1, 2)
Replace the capacitors
Capacitors have high voltage.
Be extremely carefull *1)
Check the wiring and the
cable capacity
Restart the operation
No
Yes
Yes
No
No
Yes
Yes
No
No
Yes Faulty
Normal
Be extremely carefull because of the
high voltage
N O T E
• *1) If the capacitor has a high voltage, perform the high-voltage discharge procedure. Refer to section Proce-
dure of checking other main parts for ES Series, see on page 312
• *2) Checking procedures of the diode module are displayed in item Procedure of checking other main parts for
ES Series, see on page 312.
• *3) DC voltage measuring position:
ISPM “P” terminal “+” terminal of tester, “N” terminal to “–” terminal of tester measuring position: DC 1000V.
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