Hitachi UTOPIA R32 Series Installation And Operation Manual page 75

3 Piping connection
✓ Leakage: Check for the refrigerant leakage at the piping connection.
4 Cabinet
✓ Stain and lubrication: Check for any stain and any lubrication. Remove the stain and the
lubrication.
✓ Fixing screw: Check for any loosened screw or any lost screw. Fix the loosened screws and
the lost screws.
✓ Insulation material: Check for any peeled thermal insulator on the cabinet. Repair the
thermal insulator.
5 Electrical equipment
✓ Activation: Check for an abnormal activation of the magnetic contactor the auxiliary relay the
PCB and others.
✓ Line condition: Pay attention to the working voltage the working amperage and the working
phase balance. Check for any faulty contact that is caused by the loosened terminal
connections the oxidized contacts the foreign matter and other items. Check the electrical
insulation resistance.
6 Control device and protection device
✓ Setting: Do not readjust the setting in the field unless the setting is maintained at a point that
is different from the point listed in the service manual of the unit.
For the outdoor unit
1 Compressor
✓ Sound and vibration: Check for abnormal sounds and vibrations.
✓ Activation: Check that the voltage drop of the power supply line is within 15% at the start
and within 2% during the operation.
2 Fan
✓ Rotation: Check the counter clockwise (or Clockwise according to de outdoor unit model)
rotation and the rotating speed.
3 Reverse valve
✓ Activation: Check for any abnormal activation sound.
4 Strainer
✓ Clog: Check that there is no temperature difference between both ends.
5 Ground wire
✓ Ground line: Check for the continuity to earth.
6 Oil heater
✓ Activation: You should activate the oil heater at least twelve hours before the start-up by
turning ON the main switch.
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