Hitachi RAS-07BH1 User manual

(W)
(A)
(kW)
(BTU/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.0016E
SERVICE MANUAL
AW
TECHNICAL INFORMATION
FOR SERVICE PERSONNEL ONLY
1φ, 220 V, 50 Hz
850 - 875 1,130
3.95 - 4.06 5.25
2.25 - 2.60 3.60
7,679 - 8,874 12,287
820 - 840 1300
3.81 - 3.90 6.03
2.50 - 2.90 4.20
8,533 - 9,898 14,335
785 775 815 820
250 500 298 520
175 300 194 280
930938
SPECIFICATIONS
CONTENTS
SPECIFICATIONS ------------------------------------------------------------------- 5
CONSTRUCTION AND DIMENSIONAL DIAGRAM ----------------------- 6
NAMES AND FUNCTIONS OF EACH PART------------------------------- 8
MAIN PARTS COMPONENT ---------------------------------------------------23
WIRING DIAGRAM-----------------------------------------------------------------25
BASIC MODE ------------------------------------------------------------------------33
AUTO SWING FUNCTION ------------------------------------------------------37
SERVICE CALL Q & A -----------------------------------------------------------38
REFRIGERATION CYCLE -------------------------------------------------------44
PARTS LIST AND DIAGRAM---------------------------------------------------46
RAS-07BH1/RAC-07BH1
RAS-09BH1/RAC-09BH1
RAS-14BH1/RAC-14BH1
REFER TO THE FOUNDATION MANUAL
COOLING UNIT CONDENSING UNIT
WALL TYPE
(mm)
(kg)
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
ROOM AIR CONDITIONER
COOLING UNIT + CONDENSING UNIT
COOLING UNIT CONDENSING UNIT
RAS-07BH1
RAS-09BH1 RAC-07BH1 RAC-09BH1 RAS-14BH1 RAC-14BH1
INDOOR UNIT
OUTDOOR UNIIT
RAS-09BH1
RAS-07BH1
RAS-14BH1
RAC-09BH1
RAC-07BH1
RAC-14BH1
.5

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.
First, I must disconnect
the power cord plug
from the power outlet.
DANGER
−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
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 −

1. In quiet operation or stopping the operation, 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
−4 −

20 W
2.5 µF, 400 V
YES (INTERNAL)
SL232CV-C7LU
35 µF, 400 V
YES
NO
NO
NO
NO
NO
NO
NO
NO
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
POWER SWITCH
TEMPORARY SWITCH
SERVICE SWITCH
TRANSFORMER
VARISTOR
NOISE SUPPRESSOR
REMOTE CONTROL SWITCH (LIQUID CRYSTAL)
THERMOSTAT
FUSE CAPACITY
10 W
1 µF, 400 V
YES
NO
NO
NO
NO
3.15A
891WP-A-C
YES
YES
YES
470NR
YES
YES (IC)
SPECIFICATIONS
10 A TIME DELAY FUSE
---------- 600g UNIT
PIPES
600g for piping set of 5m.
1,120g for piping set of 5m.
REFRIGERANT
CHARGING VOLUME
(Refrigerant 22)
WITHOUT REFRIGERANT BECAUSE COUPLING IS FLARE
TYPE.
8 W
1 µF, 400 V
YES
NO
NO
NO
NO
NO
NO
3.15A
891WP-A-C
YES
YES
YES
470NR
YES
YES
YES
YES (IC)
---------- 1,120g
RAS-07BH1 RAC-07BH1 RAS-14BH1 RAC-14BH1
20 W
2.5 µF, 400 V
YES (INTERNAL)
SG533QB1
30 µF, 400 V
YES
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
−5 −
15 A TIME DELAY FUSE
RAS-09BH1 RAC-09BH1

CONSTRUCTION AND DIMENSIONAL DIAGRAM
MODEL RAS-07BH1
RAS-09BH1
MODEL RAC-07BH1
RAC-09BH1
Top air suction grill
Front panel
Front cover
Cabinet
6
60
6
785
Air suction grill
248
Horizontal air deflector
Discharge grill
Vertical air deflector
400
Mounting plate
173
165
1
47
60
5
VIEWED FROM BACK
(Pipe lead-out)
120
192.5 70
43
43
(192.5)
70
70
Line code
Connecting cable Hole on the wall
for φ65mm pipe
Wide pipe(φ9.52)
Narrow pipe(φ6.35)
Drain hose
Drain cap connection part
Drain pan
When piping is drawn
horizontally , exchange
the drain hose for the
drain cap.
775
P
500
482
(18)
88
159.5
700 60 258
300
Air outlet
(19.5)
Handle
258
433
443
Air inlet
145
Handle
428
Air inlet
VIEWED FROM P
300
500
280
10 (10)
Drain hole
57
16
39
−6 −
Wireless remote controller
62
15
120
47

MODEL RAS-14BH1
MODEL RAC-14BH1
Wireless remote controller
62
15
120
VIEWED FROM P −7 −
Mounting plate 1
194
187
60
47
5
Air suction grill
Discharge grill
Vertical air deflector
815
298
Horizontal air deflector
VIEWED FROM BACK
(Pipe lead-out)
Line code
Connecting cable Hole on the wall
for φ65mm pipe Wide pipe(φ9.52)
Narrow pipe(φ6.35)
Drain hose
Drain cap connection part
When piping is drawn
horizontally , exchange
the drain hose for the
drain cap.
42.5
42.5
103
182.5 450 (182.5)
62
62
72
599
455
Air inlet
186 Handle
415
Air inlet
60 820
500
520
Air outlet
P
260
280
Handle
115
44
97 500
292
272
10 (10)
Drain hole
146
90
50 12
47
Front panel
60
5
Front cover
Cabinet
Top air suction grill

INDOOR UNIT
OUTDOOR UNIT
WIDTH (mm)
785
775
MODEL
RAS-07BH1/RAS-09BH1
RAC-14BH1
HEIGHT (mm)
250
500
DEPTH (mm)
175
300
MODEL NAME AND DIMENSIONS
NAMES AND FUNCTIONS OF EACH PART
AIR FILTER
To prevent dust from coming into the indoor unit.
(Refer page 16)
POWER PLUG (NOT PROVIDED)
INDOOR UNIT INDICATORS
Light indicator showing the operating condition.
(Refer page 5)
FRONT PANEL (AIR INLET)
HORIZONTAL DEFLECTOR VERTICAL
DEFLECTOR (AIR OUTLET)
(Refer page 12)
REMOTE CONTROL
Send out operation signal to the indoor unit. So as
to operate the whole unit.
(Refer page 6)
DRAIN PIPE
Condensed water drain to outside.
CONNECTING CORD
AIR INLET (BACK, LEFT SIDE)
AIR OUTLET
RAC-07BH1/RAC-09BH1
RAS-14BH1 815 298 194
820 520 280
−8 −

INDOOR UNIT INDICATORS
OPERATION INDICATOR
OPERATION LAMP
This lamp lights during operation.
This lamp lights in the following cases during heating.
While this is lit,heated air will not come out of the indoor unit.
OPERATION LAMP
This lamp lights during operation.
The OPERATION LAMP flashes in the following cases
during heating.
(1)During preheating
For about 2–3 minutes after starting up.
(2)During defrosting
Defrosting will be performed about once an hour
when frost forms on the heat exchanger of the
outdoor unit, for 5–10 minutes each time.
HOT KEEP LAMP
(1)During preheating
For about 2–3 minutes after starting up.
(2)During defrosting
Defrosting will be performed about once an hour
when frost forms on the heat exchanger of the
outdoor unit, for 5–10 minutes each time.
TIMER LAMP
This lamp lights when the timer is working.
SIGNAL RECEIVER
There will be abeep sound when this receiver receives
signal from remote controller.
TEMPORARY SWITCH
Use this switch to start and stop when the remote
controller does not work.
By setting 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.
HITACHI
HITACHI
RAS-09BH1
RAS-07BH1
RAS-14BH1
RAS-09BH1
RAS-07BH1
RAS-14BH1
−9 −