Hitachi RAS-(4-6)HVRNS2E - Excessively Low Voltage or Excessively High Voltage for the Inverter for IVX Series

8 Troubleshooting
224
SMGB0064 rev.0 - 08/2011
Alarm code
06
Excessively low voltage or excessively high voltage for the inverter for IVX Series
• The RUN LED ickers and “ALARM” is displayed on the remote control switch.
• The unit number, the alarm code and the unit code are alternately displayed on the set temperature section.
• The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
- This alarm code is displayed when the voltage between terminal “P” and “N” of IPM is insufcient and the alarm has
three occurrences in 30 minutes. If the number of occurrences is smaller than two, the retry operation is performed.
The alarm code “06.” Means fan controller abnormal operation.
RAS-(3-6)HVRNM2E
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
230V ±10%
No
Yes
Is the voltage over 187V during
operation?
Does the voltage fall during
the operation because of the
operation of other apparatus?
Does LED201 on PCB2
ON after compressor’s
electromagnetic switches
(CMC) turn ON?
Is connection correctly
between DipIPM and capacitors
(CB1 and CB2), DCL or CMC?
Is the DC voltage over 240V?
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