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Operating and Maintenance Cooling Unit Instructions 8-14 kW
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47
19. 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
con
fi
rm that the electrical wiring and the refrigerant
piping are correctly connected.
Test run should be performed according to the Test
Run Proce- dure on next page.
C A U T I O N
Do not operate the system until all the check points
have been cleared:
•
Check to ensure that the electrical resistance
is more than 1 M
Ω
, by measuring the resistance
between ground and the terminal of the electrical
parts. If not, do not operate the sys- tem 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 dis- charge 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
• Con
fi
rm that the gas line stop valve and the
liquid line stop valve are fully open.
• Con
fi
rm that the leakage of the refrigerant does
not exist. The
fl
are nuts are sometimes loosened by
vibration during trans- portation.
•
Check that the refrigerant piping and the
electrical wiring con- form to the same system.
• Con
fi
rm 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.
