Hitachi RAS-3HVRNME-AF, Installation And Operation Manual, Page: 34 / 40

PMML0205A rev.4 - 11/2012
34
13. TEST RUN
When installation is complete, perform commissioning according to the following procedure and hand over the system to the
customer. Perform the commissioning of the units methodically, and check that the electrical wiring and the piping are correctly
connected.
Indoor and outdoor unit must be configured by the installer to get the prefect setting and the unit working.
Test run should be performed according to the “Test Run Procedure” on next page.
13.1.1. CHECKING THE UNIT
−
Check external appearance of the unit to look for any damage due to
transportation or installation.
−
Does installation space carry out Hitachi installations (see Service
space ).
−
Check that the unit has been correctly installed.
13.1.2. ELECTRICAL CHECKING

CAUTION:
Do not operate the system until all the check points have been
cleared:
−
Check to ensure that the electrical resistance is more than
1MΩ, by measuring the resistance between ground and
electrical parts terminal. If not, do not operate the system
until the electrical leakage is found and repaired. Do not
impress the voltage on the terminals for transmission (1 and
2, 3 and 4 and sensors).
−
Check to ensure that the switch on the main power source
has been ON for more than 12 hours, in order to give the oil
heater time to warm the compressor.
−
In three-phase unit check phase sequence connection on
terminal board.
−
Check the power supply voltage (±10% of the rated voltage).
−
Check that field-supplied electrical components (main
switches, breakers, wires, conduit connectors and wire
terminals) have been properly selected according to
the electrical specifications given in the unit’s Technical
Catalogue, and check that the components comply with
national and local standards.
−
Do not touch any electrical components for more than three
minutes after turning OFF the main switch
−
Check the dip switch settings are connected as shown in the
corresponding chapter.
−
Check to ensure the electrical wiring of the indoor unit
and the outdoor unit are connected as shown in the
corresponding chapter.
−
Check to ensure the external wiring is correctly fixed to avoid
problems with vibrations, noises and cut out wires with the
plates.
13.1.3. CHECKING THE REFRIGERANT CIRCUIT
−
Check to ensure that the stop valves on the outdoor unit gas and
liquid lines are fully open.
−
Check that the size of the piping and the refrigerant charge comply
with the applicable recommendations.
−
Check the inside of the unit for refrigerant leakage. If there is a
refrigerant leak, call your dealer.

NOTE
:
−
For more reference check Troubleshooting chapter on Operation
Part.
TEST RUN
13.1. Preliminary CheCk