Electronic Expansion Valve Check Procedure - Hitachi RCI-1.0FSN3 Service Manual

8 Troubleshooting

8.2 Electronic expansion valve check procedure

Valve position
Locked fully closed
Locked slightly open
Locked fully open
255
SMGB0077 rev.0 - 01/2013
Electronic expansion valve
Check the temperature of the piping in the heating process. Failu-
re of the temperature to rise indicates a fault.
The following conditions indicate a fault:
• Where the freeze protection thermistor temperature is
lower than the intake air temperature.
• Where the unit being inspected stops and other units
continue operating in cooling mode.
8