Hitachi RAS-2-HVNP Service Manual page 226

8. Troubleshooting
08
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.
- The alarm appears during cooling operation when the compressor-top thermistor remains at Tdc 1 °C or above for
10 minutes, or at Tdc 2 °C or above for 5 seconds.
- The alarm appears during heating operation when the compressor-top thermistor remains at Tdh 1 °C or above for
10 minutes, or at Tdh 2 °C or above for 5 seconds.
Outdoor capacity
RAS-(2-6)H(V)N(P/C)(E)
RAS-(8-12)HNP(E)
RAS-(8-12)HNC(E)
212
SMGB0079 rev.0 - 01/2013
Excessively High Discharge Gas Temperature at the Top of Compressor
Tdc1
115
127
127
Tdc2 Tdh1
125 115
135 120
140 120
Tdh2
125
135
140