Hitachi PSC-A1T Technical Catalogue

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”.
Test Run Setting: 2 units
MODE
SPEED
MED
LOUV.
SEL. ADJ
T-RUN TIME
120MIN
COOL
RTN.RUN
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 ow
volume “HIGH” (default setting) and light the operation lamp. At this
time, 2-hour OFF timer will be set automatically.
Test Run: 2 units
MODE
SPEED
HIGH
LOUV.
SEL. ADJ
T-RUN TIME
120MIN
STOP
COOL
6 Press “ ” or “ ”, select “LOUV.” and select “ ” (auto swing)
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.
Test Run: 2 units
MODE
SPEED
HIGH
LOUV.
SEL. ADJ
T-RUN TIME
120MIN
STOP
COOL
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 nish 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 “ ”
Test Run: 2 units
MODE
SPEED
MED
COOL
LOUV.
SEL. ADJ
T-RUN TIME 510MIN
STOP
The RUN indicator on the remote control switch ashes when some
abnormalities such as protection devices activated occur during the
test run as well as the RUN indicator (orange) on the indoor unit
ashes (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 gure below. If the RUN
indicator on PC-ARF ashes (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.
SEL. OP MODE
MODEL : b .02
Alarm Code:
22
01-02
ALM RST
ADDR
ENT.
OK
Refrigerant Cycle No.
of Indoor Unit which
A
bnormality Occurs
Indoor Unit No.
which Abnormality Occurs
MODEL : b . 02
Alarm Code:
22
Alarm Code No.
Total No. of Indoor Unit in
Same Refrigerant Cycle as
One that Abnormality Occurs
01 - 02
Unit Model Code
4 Individual remote controls
PC-ARF
TCGB0106 rev.0 - 12/2014
68

Hitachi PSC-A1T Specifications

General

Brand	Hitachi
Model	PSC-A1T
Category	Controller
Language	English