Hitachi RAS-5HVRNM1E Service Manual page 235

8 Troubleshooting
06
Alarm code
• 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 DIP-IPM 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.
RAS-(2/2.5)HVRN1(E) and RAS-3HVRNS
227
SMGB0060 rev. 1- 12/2010
Excessively low voltage or excessively high voltage for the inverter for ES Series
8