Test Run - Hitachi Primairy Series Installation & Maintenance Manual

INSTALLATION INSTRUCTIONS
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Test run

Test run should be performed after refrigerant piping, drain, wiring, etc. have been finished.
The air conditioner is provided with a crankcase heater, check to ensure that the switch on the main power source has been ON for
more than 6 hours ahead of power on preheating, otherwise it might damage the compressor!
Do not operate the system until all the check points have been cleared.
a. Check to ensure that the stop valves of the outdoor unit are fully opened.
b. Check to ensure that the electric wires have been fully connected.
c. Check to ensure that the electrical resistance is more than 2MΩ, 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.
Test run function identification
Operate remote controller to turn ON the appliance, and then proceed test run.
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 90ºC.
• Turn off the power after test run is finished.
Installation of the appliance is generally finished after the above operations are done. If you still have any trouble, please contact
local technical service center of our company for further information.
18 HO2019292HA
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CAUTION