hitachi ras-e14h2 dc inverter

[dani_servis]

:off topic:please any body tell me why my hitachi inverter its not heating refrigerant its ok but he doesn't show any errors and when I whant to change up temperature compresor of the inverter does not change speed when I up and down temperature of the remonte control hi o only speed up when I change the speed of indoor fan I dont no what to do

[Thermatech]

The model number is different from UK model
but
If its size 14 outdoor unit I am thinking maybe ts a Set Free VRF system.

Try checking the LP & HP pressure sensor data against gauge manifold pressure. Use the SW2 on the outdoor circuit board to use the engineers mode to display the data on the outdoor circuit board LED display.

Something is stopping the inverter compressor from ramping up & incorrect data from the pressure sensors is a possible cause for this problem.