Hitachi SET FREE SIDE FLOW Serie Bedienungsanleitung Seite 31

COMMISSIONING
2 Wait for 30 seconds.
3 Push PSW1 on PCB more than 3 seconds.
• Pay attention to the following items while the system is running.
a 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.
b Do not push the button of the magnetic switch(es). It will cause
a serious accident.
• Do not touch any electrical components for at least 3 minutes after
turning OFF the main switch.
• Check that the refrigerant piping setting and electrical wiring setting
are for the same system, by operating the indoor unit one by one.
• If total unit insulation resistance is lower than 1 megohm, the
compressor insulation resistance may be low due to retained
refrigerant in the compressor. This may occur if the unit has not been
used for long periods.
1 Disconnect the cables to the compressor and measure the
insulation resistance of the compressor itself. If the resistance value
is over 1 megohm, then insulation failure has occurred of other
electrical parts.
11.1 TEST RUN PROCEDURE BY REMOTE CONTROL SWITCH
 Turn ON the power source of the Indoor and Outdoor Units
Set the TEST RUN mode by remote control switch.
Depress the "MODE" and the "
more than 3 seconds.
a.
If "TEST RUN" and the counting number of the connected
units to the remote control switch (for example "05") are

indicated on the remote control switch, the connection of
remote control cable is correct.→Go to 
b.
If no indication appear or the number of the units indicated
is smaller than the actual number of the units, some
abnormalities exist.→Go to 
Remote Control
Switch Indication
•
•
No indication
•
•

•
Counting number of
connected units is
incorrect
•
Back to  after checking
 Select TEST RUNNING MODE by depressing MODE Switch (COOL OR HEAT)
21 PMML0390B REV.0 - 11/2015 - P5416649
OK" switches simultaneously for
Wrong Portions
The power source of Outdoor Unit is
not turned ON.
The connection of the remote control
cable is incorrect.
The connecting wires of power supply
line are incorrect or loosened.
The power source of Outdoor Unit is
not turned ON.
The operating line wiring between
indoor unit and outdoor unit is not
connected.
The connection of control cables
between each indoor units are
incorrect. (When one remote control
switch controls multiple units)
2 If the insulation resistance is less than 1 megohm, disconnect the
compressor cable from the inverter PCB. Then, turn on the main
power to apply current to the crankcase heater.
After applying current for more than 3 hours, measure insulation
resistance again. (Depending on the air conditions, pipe length
or refrigerant conditions, it may be necessary to apply the current
for a longer period of time.) Check the insulation resistance and
reconnect the compressor.
• If the leakage breaker is activated, check the recommended size.
?
N O T E
• Confirm that field-supplied electrical components (main switch fuse,
fuse-free breaker, earth leakage 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.
• Use shielded wires (≥0.75mm
noise obstacle. (Total length of shielded wire shall be less then
1000m, and size of shielded wire shall comply with local codes.)
• Check to ensure that power source wiring is connected to the terminal
board corresponding to the correct voltage.
Operation lamp

Inspection Points after Power Source OFF
1 Connecting Points of Remote Control Cable terminal board of
Remote Control switch and indoor unit.
2 Contact of Terminals of Remote Control Cable
3 Connection Order of each Terminal Board
4 Screw Fastening of each Terminal Boards.
5 Dip Switch Setting on Printed Circuit Board
6 Connecting on the PCB
7
This is the same as item  1, 2 , and 3.
) for field wiring to protect electrically
2
Counting
number of
connected
05
units
