Hitachi UTOPIA RAS-4HVRP2E - Page 245

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