Hitachi FSXN Series Service Manual page 180

8 Troubleshooting
03
Alarm code
• The RUN indicator flashes and the ALARM indication is displayed on the remote control switch.
• The unit no., the alarm code and the unit code are alternatively displayed in the temperature setting section and the unit
no. and alarm code are displayed on the outdoor unit's PCB1 display.
* This alarm is indicated when an anomaly is maintained for 3 minutes after the normal transmission between indoor
and outdoor units, and also if the anomaly is maintained for 30 seconds after the microcomputer is automatically reset.
The alarm is indicated when the abnormal transmission is maintained for 30 seconds from the start up of the outdoor
unit.
* Investigate the cause of the excessive current consumption and take the necessary measures when fuses are blown
or the circuit breakers for the outdoor unit are activated.
174
SMGB0065 rev. 1 - 12/2010
Abnormal transmission between the indoor and outdoor units, heat pump system (2 pipes).