Hitachi UTOPIA RAS-4HVRP2E - Page 271

10 Troubleshooting
Troubleshooting procedure
SMGB0136 rev.0 - 07/2021
269
10
Alarm code
08
Excessively High Discharge Gas Temperature
• Thealarmcodeisashedonthe7-segmentdisplayoftheoutdoorunit.
• The alarm code is displayed on the wired controller of the indoor unit.
This alarm code is displayed when the discharge temperature is too high during cooling/heating operation.
Is thermistor THM9
normal?
Is thermistor THM9
installed correctly?
Is gas leaking?
Recharge refrigerant
Failure of Thermistor
Install it correctly
Repair gas leakage
No
No
Yes
Yes
Yes
No
Thermistor
Resistance R
T
[kΩ]
Temperature T (°C)
Thermistor Characteristics