Hitachi PC-ARF Technical Catalogue page 84

4 Individual remote controls
PC-ARF
4 The total number of the indoor units connected is indicated on the
LCD (liquid crystal display). The case of the twin combination (one
set with two indoor units) is indicated "2 units", and the triple combi-
nation (one set with three indoor units) is indicated "3 units".
a. If the indicated number is not equal to the actual connected number of indoor unit, the auto-address function is not
correctly performed due to incorrect wiring, the electric noise or etc. Turn OFF the power supply and correct the
wiring after checking the following points; (Do not repeat turning ON and OFF within 10 seconds.)
- Power supply for indoor unit is not turned ON or incorrect wiring.
- Incorrect connection of connecting cable between indoor units or incorrect connection of controller cable.
- Incorrect setting of rotary switch and dip switch (the setting is overlapped) on the indoor units PCB.
b. Press " " (run/stop) to start the test run.
c. Press " " and set each item.
5 Press " " (run/stop). Start the test run when indicating the air flow
volume "HIGH" (default setting) and light the operation lamp. At this
time, 2-hour OFF timer will be set automatically.
6 Press " " or " ", select "LOUV." and select "
by pressing " " or " ". The auto swing operation will be started.
Check the operating sound at the louvers. If abnormal sound is not
generated, press " " or " " again to stop the auto swing operation.
7 The temperature detections by the thermistors are invalid though the protection devices are valid during the test run.
8 For SET-FREE Series: According to the label "Checking of Outdoor Unit by 7-Segment Display on PCB1" attached to
the rear side of the front cover of the outdoor unit, check temperature, pressure and the operation frequency, and con-
nected indoor unit numbers by 7-Segment displays.
9 To finish the test run, press " " (run/stop) again or pass over the
set test run time. When changing the test run time, press " " or "
" to select "T-RUN TIME". Then, set the test run time (30 to 600
minutes) by pressing " " or " "
The RUN indicator on the remote control switch flashes when some
abnormalities such as protection devices activated occur during the
test run as well as the RUN indicator (orange) on the indoor unit
flashes (0.5 second ON/ 0.5 second OFF). Additionally, the alarm
code, the unit model code and connected number of indoor units will
be displayed on the LCD as shown in the figure below. If the RUN
indicator on PC-ARF flashes (2 seconds ON/ 2 seconds OFF), it may
be a failure in the transmission between the indoor unit and the re-
mote control switch (loosening of connector, disconnecting wiring or
breaking wire, etc.). In this case, check the item "Alarm Code" and
perform for troubleshooting. Consult to authorized service engineers
if abnormality can not be recovered.
68
TCGB0106 rev.0 - 12/2014
Test Run Setting: 2 units
MODE
SPEED
LOUV.
T-RUN TIME 120MIN
Test Run: 2 units
" (auto swing)
Test Run: 2 units
Test Run: 2 units
Refrigerant Cycle No.
of Indoor Unit which
Abnormality Occurs
Alarm Code:
MODEL : b . 02
Unit Model Code
COOL
MED
SEL. ADJ RUN RTN.
MODE COOL
SPEED HIGH
LOUV.
T-RUN TIME 120MIN
SEL. ADJ STOP
COOL
MODE
SPEED HIGH
LOUV.
T-RUN TIME 120MIN
SEL. ADJ STOP
MODE COOL
MED
SPEED
LOUV.
T-RUN TIME 510MIN
SEL. ADJ STOP
01-02
22
Alarm Code:
MODEL : b .02
ALM RST
ADDR
SEL. OP MODE ENT.
OK
Indoor Unit No.
which Abnormality Occurs
01 - 02
22
Alarm Code No.
Total No. of Indoor Unit in
Same Refrigerant Cycle as
One that Abnormality Occurs