Checking At Test Run - Hitachi FSXN Series Service Manual

7 Test run
(1) During the operational test, the following fault indication may
appear.
(2) If the remote control has been set to a different mode, the test run function will not start. In this case, carry out the
following actions before the test run.
Remote control: STOP.
Central station: STOP and remote control is the available mode.
COOL/HEAT change over switch: connector (CN17) of the outdoor unit PCB is open.
During the test run mode, do not change the setting of the remote control, the setting of the central station and the setting
of COOL/HEAT changeover switch.
(3) If an alarm code is indicated during the test run, reset the system by turning off the main power supply and then switch
it back on. The system must operate.

7.2.4 Checking at test run

(1) Indoor and outdoor fan
Check that the indoor and outdoor fan rotate properly and that the airflow is smooth.
(2) Power supply voltage
Check the power supply. If the power supply is abnormal, contact the electric company.
In general, the voltage drop (V
< Voltage Change >
Initial Voltage
(V )
1
Starting Voltage
(V
2
In order to protect the device, comply with the following normal power supply voltage ranges.
< Normal power supply voltage range >
Supply voltage: rated voltage ≤ ±10%
•
): rated voltage ≥ -15%
• Starting voltage (V
2
): rated voltage ≤ ±10%
• Operating voltage (V
3
Imbalance voltage between phase: ≤ 3%
•
(3) Normal operating pressure
The normal operating suction pressure is 0.2 at 1.1 MPa and the normal operating discharge pressure is 1.0 at 3.5 MPa
when the refrigerant charge is correct. Check the operating pressure with the test run.
(4) High pressure switch
Check the operating pressure of the high pressure switch in the following table.
Refrigerant
R410A
(5) High pressure increase retry (protection control)
140
SMGB0065 rev. 1 - 12/2010
) occurs when starting, as shown in the figure.
2
Operating Voltage
(V )
3
)
Operating pressure
4.15 MPa
(a) Cooling (b) Heating