Hitachi RAS-2-HVNP Service Manual page 190

7. Test run
c. Alarm code display
- If some malfunction occurs because of the activation of a safety device or any other reason, the red RUN LED blinks
(0.5 seconds ON / 0.5 seconds OFF).
Refer to section
- Alarm codes
- The alarm code displays the number of blinks of the green DEF LED and the yellow FILTER LED as shown bellow:
- Green DEF LED: Digit 2 of the alarm code blinks.
- Yellow FILTER LED: Digit 1 of the alarm code blinks. (Alphabet code: A=10 blinks, B=11 blinks, C=12 blinks, etc.).
Example:
Alarm code:
DEF LED blinks three times
(0.5 seconds ON / 0.5 seconds OFF)
FILTER LED blinks 5 times.
(0.5 seconds ON / 0.5 seconds OFF)
The red RUN LED (1 second ON / 1 second OFF) means that there is an abnormal transmission between the indoor units
and the outdoor unit.
176
SMGB0079 rev.0 - 01/2013
on chapter Troubleshooting.
Yellow FILTER LED
Green DEF LED