Hitachi RAK-15QPB User manual

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
ROOM AIR CONDITIONER
INDOOR UNIT
SERVICE MANUAL
REFER TO THE FOUNDATION MANUAL
TECHNICAL INFORMATION
FOR SERVICE PERSONNEL ONLY
SPECIFICATIONS
CONTENTS
After installation
INDOOR UNIT OUTDOOR UNIT INDOOR UNIT OUTDOOR UNIT INDOOR UNIT OUTDOOR UNIT INDOOR UNIT OUTDOOR UNIT
RAK-18R RAC-18W RAK-25R RAC-25W RAK-35R RAC-35W RAK-50R RAC-50W
(KW)
(B.T.U./h)
(KW)
(B.T.U./h)
W780 660([phone]([phone]([phone](+91)
H280 530 280 530 295 548 295 600
D218 278([phone]([phone](+27.5) 230 299(+47)
MODEL
POWER SOURCE
TOTAL INPUT (W
TOTAL AMPERES (A)
CAPACITY
COOLING
HEATING
TOTAL INPUT (W
TOTAL AMPERES (A)
CAPACITY
1,090 (250 1,460)
DIMENSIONS
(mm)
1,560 (500 2,100)
3.12-2.97
2.00 (0.90 2.50)
8,530 (3,070 10,920)
580 (250 970)
2.50 (0.90
27.57.5 27.57.5 3410 10
3.20)
3.49-3.34
11,600 (3,070 15,010)
880 (250 1,250)
NET WEIGHT (Kg)
TYPE DC INVERTER
1 PHASE,50HZ,220-230V 1 PHASE,50HZ,220-230V 1 PHASE,50HZ,220-230V
550 ( 700 (250
)1,290)
4.56-4.36
3.40 (0.90 4.40)
11,600 (3,070 15,010)
4.87-4.66
1,100 (250 1,700)
5.51-5.27
14,330 (3,070 17,060)
3.75-3.59
2.50 (0.90 3.10)
8,530 (3,070 10,580)
7.30-6.98
3.50 (0.90 4.00) 5.00 (1.90 5.20)
11,940 (3,070 13,650) 17,060 (6,480 17,740)
20,470 (7,510 24,910)
7.93-7.59
1,660 (500 2,750)
4.20 (0.90 5.00) 6.00 (2.20 7.30)
250
Hitachi Household Appliances(Wuhu) Co., Ltd.
PB PB PB PB PB PB PB PB
RAK-18RPB
RAK-15QPB
RAK-25RPB
1 PHASE,50HZ,220-230V
RAK-35RPB
RAK-50RPB
40
RAR-6N2 RAR-6N1
1010
RAK-15QPB RAK-18RPB RAK-25RPB RAK-35RPB RAK-50RPB
- RAC-18WPB RAC-25WPB RAC-35WPB RAC-50WPB
RAM-33NP2B o o o - -
RAM-40NP2B o o o o -
RAM-53NP2B o o o o o
RAM-53NP3B o o o o o
RAM-68NP3B o o o o o
RAM-70NP4B o o o o o
RAM-90NP5B o o o o o
RAM-110NP6B o o o o o
Single outdoor unit
Multi
outdoor unit
Indoor unit
RAK-18RPB
RAK-15QPB
RAK-25RPB
RAK-35RPB
RAK-50RPB
HHAW
NO.0089E-1
INDOOR UNIT
SPECIFICATIONS ------------------------------------------------------------------- 6
HOW TO USE ----------------------------------------------------------------------10
CONSTRUCTION AND DIMENSIONAL DIAGRAM --------------------- 44
MAIN PARTS COMPONENT --------------------------------------------------- 46
WIRING DIAGRAM ---------------------------------------------------------------- 47
CIRCUIT DIAGRAM --------------------------------------------------------------- 49
BLOCK DIAGRAM ----------------------------------------------------------------- 51
BASIC MODE ----------------------------------------------------------------------- 52
REFRIGERATING CYCLE DIAGRAM --------------------------------------- 64
DESCRIPTION OF MAIN CIRCUIT OPERATION ----------------------- 68
SERVICE CALL Q & A ---------------------------------------------------------- 7
PROCEDURE FOR DISASSEMBLY AND REASSEMBLY------------- 6
7
6
VARIOUS SETTINGS -----------------------------------------------------------------
RAC-18WPB,RAC-25WPB,RAC-35WPB，RAC-50WPB（HHAW NO.0080E）
RAM-33NP2B（PM NO.0581E）
This manual describes only pointsthat differ from
for items not described in this manual.
RAM-40NP2B（PM NO.0582E）
RAM-53NP2B,RAM-53NP3B（PM NO.0583E）
RAM-110NP6B
（PM NO.0584E）RAM-68NP3B
（PM NO.0585E）RAM-70NP4B
（PM NO.0586E）RAM-90NP5B
（PM NO.0587E）
PARTS LIST AND DIAGRAM -------------------------------------------------- 105
87
- 1 -

 ,QRUGHUWRGLVDVVHPEOHDQGUHSDLUWKH
XQLWLQTXHVWLRQEHVXUHWRGLVFRQQHFWWKH
SRZHUFRUGSOXJIURPWKHSRZHURXWOHW
EHIRUHVWDUWLQJWKHZRUN
 ,ILWLVQHFHVVDU\WRUHSODFHDQ\SDUWVWKH\VKRXOGEHUHSODFHGZLWKUHVSHFWLYHJHQXLQHSDUWVIRUWKHXQLW
DQGWKHUHSODFHPHQWPXVWEHHIIHFWHGLQFRUUHFWPDQQHUDFFRUGLQJWRWKHLQVWUXFWLRQVLQWKH6HUYLFH
DQXDORIWKHXQLW
 $IWHUFRPSOHWLRQRIUHSDLUVWKHLQLWLDOVWDWHVKRXOGEH
UHVWRUHG
 /HDGZLUHVVKRXOGEHFRQQHFWHGDQGODLGDVLQWKH
LQLWLDOVWDWH
 RGLILFDWLRQRIWKHXQLWE\WKHXVHUKLPVHOIVKRXOG
DEVROXWHO\EHSURKLELWHG
 7RROVDQGPHDVXULQJLQVWUXPHQWVIRUXVHLQUHSDLUVRULQVSHFWLRQVKRXOGEHDFFXUDWHO\FDOLEUDWHGLQ
DGYDQFH
 ,QLQVWDOOLQJWKHXQLWKDYLQJEHHQUHSDLUHGEHFDUHIXOWRSUHYHQWWKHRFFXUUHQFHRIDQ\DFFLGHQWVXFKDV
HOHFWULFDOVKRFNOHDNRIFXUUHQWRUERGLO\LQMXU\GXHWRWKHGURSRIDQ\SDUW
 7RFKHFNWKHLQVXODWLRQRIWKHXQLWPHDVXUHWKHLQVXODWLRQUHVLVWDQFHEHWZHHQWKHSRZHUFRUGSOXJDQG
JURXQGLQJWHUPLQDORIWKHXQLW
7KHLQVXODWLRQUHVLVWDQFHVKRXOGEH 1RUPRUHDVPHDVXUHGE\D9'&PHJJHU
 7KHLQLWLDOORFDWLRQRILQVWDOODWLRQVXFKDVZLQGRZIORRURUWKHRWKHUVKRXOGEHFKHFNHGIRUEHLQJVDIH
HQRXJKWRVXSSRUWWKHUHSDLUHGXQLWDJDLQ
,ILWLVIRXQGQRWVRVWURQJDQGVDIHWKHXQLWVKRXOGEHLQVWDOOHGDWWKHLQLWLDOORFDWLRQDIWHUUHLQIRUFHGRU
DWDQHZORFDWLRQ
 $Q\LQIODPPDEOHREMHFWPXVWQRWEHSODFHG
DERXWWKHORFDWLRQRILQVWDOODWLRQ
 &KHFNWKHJURXQGLQJWRVHHZKHWKHULWLV
SURSHURUQRWDQGLILWLVIRXQGLPSURSHU
FRQQHFWWKHJURXQGLQJWHUPLQDOWRWKHHDUWK
6SUD\
JDVROLQH
JDVERPEH
WKLQQHU
6$)(7<'85,1*5(3$,5:25.
,IWKH FRQWDFWVRIHOHFWULFDO
SDUWVDUHGHIHFWLYHUHSODFH
WKHHOHFWULFDOSDUWVZLWKRXW
WU\LQJWRUHSDLUWKHP





DANGER
- 2 -

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 manufactures during maintenance and handling thereof. (They apply the same to handling of
abnormal goods such as rejected goods being returned.)
2. Object parts
(1) Microcomputer
(2) Integrated circuits (I.C.)
(3) Field effective transistor (F.E.T.)
(4) P.C. boards or the like to 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.)
(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.
HITACH I IC401TH 1 ,188UV
Fig. 1 Conductive container
A conductive polyvinyl bag
IC
IC
Conductive sponge
Fig. 2 Body earth
Body earth (Elimik conductive band)
Clip for connection with
a grounding wire
1MΩ
- 3 -

(6) Use a three wire type soldering iron including a grounding wire.
Fig.4 Grounding a solder iron
Use a high insulation mode (100V, 10MΩor 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 short circuit a load circuit or the like.
Bare copper wire (for body earth)
Metal plate (of Al. stainless steel, etc.)
Working table
Resistor 1MΩ(1/2W)
Earth wire
Staple
Fig.3 Grounding of the working table
soldering iron
Grounding wire
Screw stop at the screwed
part using a rag plate
- 4 -

1. In quiet or stop 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 turn off the circuit breaker for safety.
3. In the event of power failure,the room air conditioner will restare automatically in the previously
mode once the power is restored. In the event of power failure during TIMER operation, the room air comditioner
will not start automatically. Re-press ON/OFF button after 3 minutes from when the unit off or power recovery.
4. If the room air conditioner is stopped by adjusting thermostat, or missoperation, and re-start in a moment,
there is occasion that the cooling and heating 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.
5. This room air conditioner should not be used at the cooling operation when the outside temperature is
below -10°C (14°F).
6. This room air conditioner (the reverse cycle) should not be used when the outside temperature is below
–15°C (5°F).
If the reverse cycle is used under this condition, the outside heat exchanger is frosted and efficiency falls.
7. When the outside heat exchanger is frosted, the frost is melted by operating the hot gas system, it is not
trouble that at this time fan stops and the vapour may rise from the outside heat exchanger.
!
CAUTION
selected
- 5 -

SPECIFICATIONS
MODEL
FAN MOTOR
FAN MOTOR CAPACITOR
FAN MOTOR PROTECTOR
COMPRESSOR
COMPRESSOR MOTOR CAPACITOR
OVERLOAD PROTECTOR
OVERHEAT PROTECTOR
FUSE (for MICROPROCESSOR)
POWER RELAY
POWER SWITCH
TEMPORARY SWITCH
SERVICE SWITCH
TRANSFORMER
VARISTOR
NOISE SUPPRESSOR
THERMOSTAT
REMOTE CONTROL SWITCH (LIQUID
CRYSTAL)
WITHOUT REFRIGERANT BECAUSE
COUPLING IS FLARE TYPE.
PIPES
REFRIGERANT CHARGING
VOLUME
(Refrigerant 410A)
NO
NO
–
NO
NO
NO
NO
YES
NO
NO
YES(IC)
YES
30W (DC325 V)
3.15A
NO
450NR
R
YES
RAK-15QPB,RAK-18RPB,RAK-25RPB,RAK-35RPB,RAK-50RPB
- 6 -

Figure showing the installation of lndoor unit
MODEL RAK-15Q PB
RAK-18RPB
above
50mm
above 50mm
above 50mm
mm003tuoba
about 450mm
dnebtontsum
The indoor piping should be
insulated with the enclosed
insulation pipe. (If the insulator is
insufficient, please use commercial
products.)
Be sure to
completely
seal any gap
with putty.
2300 mm or more
Plug
Maximum pipe length 20m Minimum pipe length 3m
RAK-25RPB
- 7 -

Figure showing the installation of lndoor unit
MODEL RAK-35RPB
above
50mm
above 50mm
above 50mm
tuoba 300mm
atubo 450mm
must ton bend
The indoor piping should be
insulated with the enclosed
insulation pipe. (If the insulator is
insufficient, please use commercial
products.)
Be sure to
completely
seal any gap
with putty.
2300 mm or more
Maximum pipe length 20m Minimum pipe length m3
Plug
RAK-50RPB
- 8 -

!
CAUTION
Before setting the switch, make sure to turn OFF
power supply and then set the position of the switch
otherwise will cause damage to the Main PCB.
1.0kW1.0kW
1.0kW 1.5kW
1.5kW
1.5kW
SWITCH POSITION CAPACITY SELECTION
NOTE:
FACTORY default setting is at 1.5kW capacity.
This setting is applicable for RAK-15QPB only.
SWITCH SETTING TO SELECT 1.5kW
OR 1.0kW CAPACITY
- 9 -

– 1 –
Remote Controller Manual
Remote Controller manual Page 1~28 To obtain the best performance and ensure years of trouble free use, please read this instruction manual completely.
MODEL
RAR-6N2
– 2 –
PREPARATION BEFORE OPERATION
■To install the batteries
■To Þx the remote controller holder to the wall
1. Slide the cover to take it off. 2. Install two dry batteries AAA.LR03 (alkaline). The direction of the batteries should match the
marks in the case.
3. Replace the cover at its original position. 1. Choose a place from where the signals can reach the unit. 2. Fix the remote controller holder to a wall, a pillar or similar
location with the provided screws.
3. Place the remote controller in the remote controller holder.
NOTE
Notes on batteries ●When replacing the batteries, use batteries of the same
type, and replace both old batteries together.
●When the system is not used for a long time, take the
batteries out.
● The batteries will last for approximately 1 year. However, if
the remote controller display begins to fade and degradation of reception performance occurs within a year, replace both batteries with new size AAA.LR03 (alkaline).
● The attached batteries are provided for the initial use of
the system.
The usable period of the batteries may be short depending
on the manufactured date of the air conditioner.
Notes on the remote controller ● Never expose the remote controller to direct sunlight. ● Dust on the signal transmitter or receiver will reduce the
sensitivity. Wipe off dust with soft cloth.
● Signal communication may be disabled if an electronic-
starter-type fluorescent lamp (such as inverter-type lamps) is in the room. Consult the shop if that is the case.
●If the remote controller signals happen to operate another
appliance, move that appliance to somewhere else, or consult the service shop.
●When the remote controller is not in use, please close the
slide cover to prevent failure.
Remote controller
Screws
Remote controller holder
- 10 -