Test Run - Hitachi AirCore 700 Installation & Maintenance Manual

•
When connecting the terminal block using stranded
wire, make sure to use the round crimp-style terminal for
connection to the power supply terminal block. Place the
round crimp-style terminals on the wires up to the covered
part and secure them in place.
•
When connecting the terminal block using a single core wire,
be sure to perform curing.

4.7 Test Run

Test run should be performed after refrigerant piping, drain, wiring, etc. have been finished.
CAUTION
!
•
The air conditioner is provided with electromagnetic heating function, check to ensure that the
switch on the main power source has been ON for more than 4 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.
(1) Check to ensure that the stop valves of the outdoor unit are fully opened.
(2) Check to ensure that the electric wires have been fully connected.
(3) 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 .
Test run setting
Step1: Setting DSW1 on the PCBA can enter the test run mode. See the table below for specific settings.
DSW1
Rated cooling
Rated heating
Intermediate cooling
Intermediate heating
Step2: Check temperature conditions. This operation will not be performed if the temperature condition
is out of range.
NOTES:
•
Check whether the temperature condition is within the test run range.
Cooling: -5°C~52°C DB
Heating: -15°C~15.5°C DB
If the system does not perform a test run, check the indoor and outdoor temperature and humidity
(The system does not operate in cooling mode at an outdoor temperature of -5°C DB or lower).
•
After completing the test run through DSW1 of the outdoor unit PCBA, all DSW1 should be set to OFF.
<Attentions when Connecting the Power Supply Wiring>
DSW1-1
ON
ON
ON
ON
Round crimp-
style terminal
DSW1-2 DSW1-3
OFF
ON
OFF
ON
-19-
4. Installation Instructions
Covered part
Stranded wire
Terminal
Single core wire
DSW1-4
OFF OFF
OFF OFF
ON OFF
ON OFF