Hitachi UTOPIA RAS-4HVRP2E Service Manual page 245

10 Troubleshooting
Troubleshooting procedure
06
Alarm code
- This alarm code is displayed when the voltage between terminal "P" and "N" of Inverter 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.
Restart the operation
Is the power
supply voltage 230V
±10%?
Yes
Is the voltage
over 187V during
operation?
Yes
Does the voltage
fall during operation
by operation of other
apparatus?
No
Does LED353 on PCB1 ON
after RY1 is ON?
No
Is connection
correctly between
PCB1 and ACL?
Yes
?
N O T E
Only replace electrical box when LED is OFF.
243 SMGB0136 rev.0 - 07/2021
Excessively low voltage or excessively high voltage for the inverter (RAS-3HVRC2)
No
No
Yes
How is the
Yes
compressor
operation?
No
Check the wiring and
the cable capacity
Frequency can
increase higher than
60 Hz
Compressor stops
immediately
(lower than 20 Hz)
Compressor stops
when frequency
increases (Approx
20Hz to 60Hz)
Faulty PCB1.
Replace electrical box
Connect correctly
Faulty PCB1.
Replace electrical box
10