Hitachi RAS-07CH1 User manual

(W)
(A)
(kW)
(B.T.U./h)
(W)
(A)
(KW)
(BTU/H)
W
H
D
TOTAL INPUT
TOTAL AMPERES
CAPACITY
TOTAL INPUT
TOTAL AMPERES
CAPACITY
TYPE
MODEL
POWER SOURCE
COOLING
HEATING
DIMENSIONS
NET WEIGHT
NO. 0079E
SERVICE MANUAL
PM
TECHNICAL INFORMATION
FOR SERVICE PERSONNEL ONLY
1 Ø, 220 – 240 V, 50 Hz
680 – 730 870 – 925
3.2 – 3.1 4.1 – 4.1
2.05 – 2.05 2.50 – 2.50
7,000 – 7,000 8,500 – 8,500
630 – 685 860 – 920
3.0 – 2.9 4.0 – 4.0
2.30 – 2.30 2.94 – 3.00
7,850 – 7,850 10,000 – 10,200
785 700 785 700
265 570 265 570
168 210 168 210
726726
SPECIFICATIONS
CONTENTS
SPECIFICATIONS ------------------------------------------------------------------- 5
CONSTRUCTION AND DIMENSIONAL DIAGRAM ----------------------- 6
NAMES AND FUNCTIONS OF EACH PART ------------------------------- 7
MAIN PARTS COMPONENT --------------------------------------------------- 20
WIRING DIAGRAM ----------------------------------------------------------------- 22
WIRING DIAGRAM OF THE PRINTED WIRING BOARD ------------- 24
BASIC MODE ------------------------------------------------------------------------ 31
DESCRIPTION OF MAIN CIRCUIT OPERATION ------------------------ 35
AUTO SWING FUNCTION ------------------------------------------------------ 40
SERVICE CALL Q & A ----------------------------------------------------------- 41
DIAGNOSIS CHART FOR BREAK-DOWN --------------------------------- 46
REFRIGERATION CYCLE ------------------------------------------------------- 56
PARTS LIST AND DIAGRAM --------------------------------------------------- 57
RAS-07CH1
RAS-09CH1
RAC-07CHV1
RAC-09CHV1
RAS-07CH1/RAC-07CHV1
RAS-09CH1/RAC-09CHV1
REFER TO THE FOUNDATION MANUAL
COOLING UNIT
RAS-07CH1
CONDENSING UNIT
RAC-07CHV1
WALL TYPE
(mm)
(kg)
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
ROOM AIR CONDITIONER
COOLING UNIT + CONDENSING UNIT
NOVEMBER 1997 H.A.P.M.
COOLING UNIT
RAS-09CH1
CONDENSING UNIT
RAC-09CHV1

SAFETY DURING REPAIR WORK
1. In order to disassemble and repair
the unit in question, be sure to
disconnect the power cord plug
from the power outlet before starting
the work.
2. If it is necessary to replace any parts, they should be replaced with respective genuine parts for the unit, and
the replacement must be effected in correct manner according to the instructions in the Service Manual of
the unit.
If the contacts of electrical parts
are defective, replace the
electrical parts without trying to
repair them.
3. After completion of repairs, the initial state
should be restored.
4. Lead wires should be connected and laid as
in the initial state.
5. Modification of the unit by user himself should
absolutely be prohibited.
6. Tools and measuring instruments for use in repairs or inspection should be accurately calibrated in advance.
7. In installing the unit having been repaired, be careful to prevent the occurence of any accident such as
electrical shock, leak of current, or bodily injury due to the drop of any part.
8. To check the insulation of the unit, measure the insulation resistance between the power cord plug and
grounding terminal of the unit. The insulation resistance should be 1M or more as measured by a 500V
DC megger.
9. The initial location of installation such as window, floor or the other should be checked for being and safe
enough to support the repaired unit again.
If it is found not so strong and safe, the unit should be installed at the initial location reinforced or at a new
location.
10. Any inflammable thing should never
be placed about the location of
installation.
11. Check the grounding to see whether
it is proper or not, and if it is found
improper, connect the grounding
terminal to the earth.
– 1 –

WORKING STANDARDS FOR PREVENTING BREAKAGE OF SEMICONDUCTORS
1. Scope
The standards provide for items to be generally observed in carrying and handling semiconductors in relative
manufacturers during maintenance and handling thereof. (They apply the same to handling of abnormal goods
such as rejected goods being returned).
2. Object parts
(1) Micro computer
(2) Integrated circuits (IC)
(3) Field-effect transistors (FET)
(4) P.C. boards or the like on which the parts mentioned in (1) and (2) of this paragraph are equipped.
3. Items to be observed in handling
(1) Use a conductive container for carrying and storing of parts. (Even rejected goods should be handled in
the same way).
Fig. 1. Conductive Container
(2) When any part is handled uncovered (in counting, packing and the like), the handling person must always
use himself as a body earth. (Make yourself a body earth by passing one M ohm earth resistance through
a ring or bracelet).
(3) Be careful not to touch the parts with your clothing when you hold a part even if a body earth is being
taken.
(4) Be sure to place a part on a metal plate with grounding.
(5) Be careful not to fail to turn off power when you repair the printed circuit board. At the same time, try
to repair the printed circuit board on a grounded metal plate.
1M
Fig. 2. Body Earth
Body earth
(Elimik conductive band)
Clip for connection with a
grounding wire
IC
A conductive polyvinyl bag IC
Conductive sponge
– 2 –

(6) Use a three wire type soldering iron including a grounding wire.
Bare copper wire (for body earth)
Working
table
Resistor of 1 M (1/2W)
Earth wire
Fig. 3. Grounding of the working table
2
Screw stop at the screwed
part using a rag plate
Soldering iron
Grounding
wire
Fig. 4. Grounding a soldering iron
Use a high insulation mode (100V, 10M or higher) when ordinary iron is to be used.
(7) In checking circuits for maintenance, inspection or some others, be careful not to have the test probes of the
measuring instrument shortcircuit a load circuit or the like.
Metal plate (of aluminium, stainless steel, etc.)
Staple
– 3 –

– 4 –
1. In quiet operation or stopping the running, slight flowing noise of refrigerant in the refrigerating cycle is heard
occasionally, but this noise is not abnormal for the operation.
2. When it thunders near by, it is recommend to stop the operation and to disconnect the power cord plug from
the power outlet for safety.
3. If the room air conditioner is stopped by setting the temperature or mis-operation, and then re-started in a
moment, cooling operation does not start for 3 minutes, it is not abnormal and this is the result of the
operation of IC delay circuit. This IC delay circuit ensures that there is no danger of blowing fuse or
damaging parts even if operation is restarted accidentally.
4. This room air conditioner should not be used at the cooling operation when the outside temperature is below
20°C.
5. When the operation knob is set to “COOL” from another position, IC delay circuit functions and stops the
compressor for the first 3 minutes, which is not an abnormal phenomenon.
CAUTION

RAC-09CHV1
20 W
1.5 µF, 400 V
YES (INTERNAL)
G533QB9Z
30 µF, 400 V
YES
YES
3.15A
G4A
NO
NO
YES
NO
450NR
NO
NO
NO
MODEL
FAN MOTOR
FAN MOTOR CAPACITOR
FAN MOTOR PROTECTOR
COMPRESSOR
COMPRESSOR MOTOR CAPACITOR
OVERLOAD PROTECTOR
OVERHEAT PROTECTOR
FUSE (for MICRO COMPUTER)
POWER RELAY, STICK RELAY
POWER SWITCH
TEMPORARY SWITCH
SERVICE SWITCH
TRANSFORMER
VARISTOR
NOISE SUPPRESSOR
REMOTE CONTROL SWITCH (LIQUID CRYSTAL)
THERMOSTAT
FUSE CAPACITY
RAS-09CH1
20 W
NO
NO
NO
NO
NO
NO
NO
NO
YES
YES
NO
NO
NO
NO
YES
YES (IC)
SPECIFICATIONS
10 A TIME DELAY FUSE
---------- ❈ 630g
UNIT
PIPES
❈630g for piping set of 5~8m.
❈670g for piping set of 5~8m.
REFRIGERANT
CHARGING VOLUME
(Refrigerant 22)
WITHOUT REFRIGERANT BECAUSE COUPLING IS FLARE
TYPE.
P - 105 VK1 (5m), P - 108 VK1 (8m)
– 5 –
RAC-07CHV1
20 W
1.5 µF, 400 V
YES (INTERNAL)
G333DB2Z
30 µF, 400 V
YES
YES
3.15A
G4A
NO
NO
YES
NO
450NR
NO
NO
NO
RAS-07CH1
20 W
NO
NO
NO
NO
NO
NO
NO
NO
YES
YES
NO
NO
NO
NO
YES
YES (IC)
---------- ❈ 670g

CONSTRUCTION AND DIMENSIONAL DIAGRAM
MODEL RAS-07CH1, RAS-09CH1
MODEL RAC-07CHV1, RAC-09CHV1
88.5
Hole on the wall
for ø65mm pipe
Connecting cable
Line cord
Mounting
plate
Air suction grill
6.5
43
60
47
Discharge grill
785
Vertical air deflector
785
Top Air suction grill
Horizontal air deflector
P
77
60
6.5
Front cover
168 10
47
Cabinet
62
15
Wireless remote controller
120
265
About 340
About 430
About
400
VIEWED FROM BACK
VIEWED FROM BACK
(PIPE LEAD-OUT)
167.5 450 (167.5)
92 58 58
Drain outlet
Drain hose Drain pan
25
43
Narrow pipe (ø6.35)
Narrow pipe (ø6.35)
Wide pipe (ø9.52)
Wide pipe (ø9.52)
55.5
Drain cap connection part
When piping is drawn
When piping is drawn
horizontally, exchange
the drain hose for the
drain cap.
Air outlet
Handle
Air inlet
(18)
490
Handle
Viewed from P
157
245 225
8
10
500
35
12
16
55
570
428
700
243
53 236
210 10 482
517
135
75
77
HITACHI
P
–6 –

MODEL
RAS-07CH1, RAS-09CH1
RAC-07CHV1, RAC-09CHV1
CONDENSING UNIT
WIDTH (mm)
785
700
HEIGHT (mm)
265
570
DEPTH (mm)
168
210
MODEL NAME AND DIMENSIONS
NAMES AND FUNCTIONS OF EACH PART
AIR FILTER
To prevent dust from coming into the indoor unit.
(Refer page 17)
POWER PLUG (NOT PROVIDED)
SUCTION GRILL (AIR INLET).
COOLING UNIT INDICATORS
Light indicator showing the operating condition.
(Refer page 8)
HORIZONTAL DEFLECTOR ●VERTICAL
DEFLECTOR (AIR OUTLET)
(Refer page 14)
REMOTE CONTROL
Send out operation signal to the indoor unit. So as to
operate the whole unit.
(Refer page 9)
DRAIN PIPE
Condensed water drain to outside.
CONNECTING CORD
AIR INLET (BACK, LEFT SIDE)
AIR OUTLET
Blow out warm air.
EARTH WIRE SCREW
RAS-07CH1, RAS-09CH1
RAC-07CHV1, RAC-09CHV1
COOLING UNIT
–7 –

RAS-
RAS-
Temporary Switch
Non-conductor Stick
Press
about 7mm
COOLING UNIT INDICATORS
TEMPORARY SWITCH
Use this switch to start and stop when the remote
controller does not work. [Use non-conductor stick
(example toothpick)]
●By pressing the temporary switch, the operation is
done in previously set operation mode.
●When the operation is done using the temporary switch
after the power source is turned off and turn on again,
the operation is done in automatic mode.
POWER SWITCH
OPERATION INDICATOR
OPERATION LAMP
This lamp lights during operation.
TIMER LAMP
This lamp lights when the timer is working.
SIGNAL RECEIVER
There will be a beep sound when this receiver receive
signal from remote controller.
–8 –

NAMES AND FUNCTIONS OF REMOTE CONTROL UNIT
■This controls the operation function and timer setting of the room air conditioner. The range of
control is about 4 meters. If indoor lighting is controlled electronically, the range of control may be
shorter.
Precautions for Use
●Do not put the remote controller in direct
sunlight and high temperature.
●Do not drop it on the floor, and protect
it from water.
●If you press the FUNCTION selector
button during operation, the air
conditioner may stop for about 3 minutes
for protection before you can start it
again. (unless you turn off and on again
the power source)
You can use the remote controller by fixing it on the
wall with the accessory parts.
●Before fixing it,
make sure the
unit can be
controlled by the
remote control
unit at the fixing
position.
REMOTE
CONTROLLER
HOLDER
CANCEL Button
Cancel timer reservation.
Signal Transmission
˚
ON/OFF Button
Press this button to start operation.
Press it again to stop operation.
FUNCTION Button
Select the operation mode.
(Page 12)
DEHUMIDIFY Button
Dehumidify mode direct selection.
(Page 11)
Reserve Button
Timer setting reservation.
OFF TIMER Button
Select the turn OFF time.
ON TIMER Button
Select the turn ON time.
Transmission Sign
The transmission sign blinks
when a signal has been send.
TEMPERATURE Button
Room temperuture setting.
Value will change more quickly
when keep pressing.
(Page 12)
FAN SPEED Button
Select the fan speed for
cooling and circulation mode.
(Page 12)
AUTO SWING Button
Control the angle of the
horizontal air deflector.
( Page 14)
–9 –