Hitachi YUTAKI S Serie Manuel D'installation page 34

13. TEST RUNNING
When installation is completed, perform test run according to the following procedure, and hand over the system to the customer.
Perform test run regarding indoor units one by one in order, and confirm that the electrical wiring and the refrigerant piping are
correctly connected.
Test run should be performed according to the Test Run Procedure on next page.

WARNING
■ Do not operate the system until all the check points have
been cleared:
- Check to ensure that the electrical resistance is
more than 1 MΩ, by measuring the resistance
between ground and the terminal of the electrical
parts. 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.
- Check to ensure that the stop valves of the outdoor
unit are fully opened, and then start the system.
- Check to ensure that the switch on the main power
source has been ON for more than 12 hours, to
warm the compressor oil by the oil heater.
■ Pay attention to the following items while the system is running:
- Do not touch any of the parts by hand at the
discharge gas side, since the compressor chamber
and the pipes at the discharge side are heated
higher than 90°C.
- DO NOT PUSH THE BUTTON OF THE
MAGNETIC SWITCH(ES), it will cause a serious
accident.
■ Do not touch any electrical components for more than three
minutes after turning OFF the main switch.
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PMML0215A rev.1 - 02/2012
■ Confirm that the gas line stop valve and the liquid line stop
valve are fully open.
■ Confirm that the leakage of the refrigerant does not exist.
The flare nuts are sometimes loosened by vibration during
transportation.
■ Check that the refrigerant piping and the electrical wiring
conform to the same system.
■ Confirm that the dip switch setting on the printed circuit board
of the indoor units and the outdoor units are correct.
■ Check whether or not the electrical wiring of the indoor units
and the outdoor units are connected as shown in the chapter
ELECTRICAL WIRING.

CAUTION :
Confirm that field-supplied electrical components (main
switch fuse, fuse-free breaker, earthleakage breakers,
wires, conduit connectors and wire terminals) have been
properly selected according to the electrical data given
in the Technical Catalog of the unit and ensure that the
components comply with national and local codes.

NOTE:
For more reference check Troubleshooting chapter on
Operation Part.

ATTENTION:
HRNME series, does not operate within 4 hours after
power supply stoppage cause (d1-22).
In case of operating within 4 hours, push PSW1 and
PSW3 on PCB simultaneously more than 3 seconds.
TEST RUNNING