Hitachi RAS-H(V)RNME-AF Service Manual page 344

12 Troubleshooting
03
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 is displayed when an abnormal operation is maintained for three minutes after the normal transmis-
sion between the indoor units and the outdoor unit. Also, an abnormal operation is maintained for 30 seconds
after the micro-computer is automatically reset. The alarm is displayed when the abnormal transmission is main-
tained for 30 seconds from the starting of the outdoor unit.
- Investigate the cause of the overcurrent and take the necessary action when the fuses are blown out or the
breaker for the outdoor unit is activated.
(Refer to the next page)
334
SMGB0070 rev. 1 - 08/2011
Abnormal transmission between the indoor units and the outdoor unit