Hitachi RWM-(H)FSN3E, Service Manual

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12 Troubleshooting
SMGB0070 rev. 1 - 08/2011
344
Alarm code
06
Excessively low voltage or excessively high voltage for the inverter (RAS-(4-6)HRNME-AF)
• The RUN LED flickers 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 ISPM is insufficient 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.
No
Check the wiring and
the cable capacity
Frequency can increa-
se higher than 60 Hz
Restart the operation
Check the wiring, ISPM
and capacitors (CB1,2)
*2).
In case the wiring is
correct, replace ISPM
Check capacitors (CB1, 2)
Faulty ISPM
Replace ISPM
Replace the capacitors
Connect correctly
Yes
Yes
No
Yes
No
Yes
Compressor stops
immediately
(lower than 30 Hz)
Compressor stops
when frequency increa-
ses (Approx. 30 Hz to
60 Hz)
Faulty ISPM.
Replace ISPM
No
No
Yes
Yes
No
Normal
Faulty
Be extremely carefull because of the high voltage
Capacitors have high voltage.
Be extremely carefull *1)
Is the power
supply voltage 400V
±10%?
Is the voltage
over 340V during
operation?
Does the
voltage fall during
the operation because of
the operation of other
apparatus?
Does LED201
on ISPM is ON?
How is
the compres-
sor operation?
Is connection
correctly between
ISPM and reactor (PCL)
with capacitors (CB1,2)
or CMC?
Is the DC
voltage over 460V?
*1) If the capacitor has a high voltage, perform the high-voltage discharge procedure. Refer to Procedure of checking
other main parts .
*2) Checking procedures of the diode module are displayed in item Procedure of checking other main parts .
*3) DC voltage measuring position:
ISPM “P” terminal to “+” terminal of tester, “N” terminal to “–” terminal of tester measuring position: DC 1000V.