Hitachi RAK-35RPC 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
RAK-50RPC
(KW)
(B.T.U./h)
(KW)
(B.T.U./h)
W900 750([phone](+85)
H295 548 295 600
D230 288(+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)
3310 10
NET WEIGHT (Kg)
TYPE DC INVERTER
1 PHASE,50Hz ,220-230V
4.87-4.66
1,100 (250 1,700)
5.51-5.27
14,330 (3,070 17,060)
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)
Hitachi Household Appliances(Wuhu) Co., Ltd.
1 PHASE,50Hz ,220-230V
RAK-35RPC
RAK-50RPC
41
RAR-6N1
RAK-35RPC RAK-50RPC
RAC-35WPC RAC-50WPC
Single outdoor unit
Indoor unit
RAK-35RPC
RAK-50RPC
HHAW
NO.0096E
INDOOR UNIT
SPECIFICATIONS ------------------------------------------------------------------- 6
HOW TO USE ---------------------------------------------------------------------- 8
CONSTRUCTION AND DIMENSIONAL DIAGRAM --------------------- 28
MAIN PARTS COMPONENT --------------------------------------------------- 29
WIRING DIAGRAM ---------------------------------------------------------------- 30
CIRCUIT DIAGRAM --------------------------------------------------------------- 32
BLOCK DIAGRAM ----------------------------------------------------------------- 33
BASIC MODE ----------------------------------------------------------------------- 34
REFRIGERATING CYCLE DIAGRAM --------------------------------------- 46
DESCRIPTION OF MAIN CIRCUIT OPERATION ----------------------- 48
SERVICE CALL Q & A ----------------------------------------------------------
PROCEDURE FOR DISASSEMBLY AND REASSEMBLY-------------
VARIOUS SETTINGS -----------------------------------------------------------------
This manual describes only points that 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 -------------------------------------------------- 84
Multi
outdoor unit
RAM-40NP2B o -
RAM-53NP2B o o
RAM-53NP3B o o
RAM-68NP3B o o
RAM-70NP4B o o
RAM-90NP5B o o
RAM-110NP6B o o
RAC-50WPC
OUTDOOR UNIT
INDOOR UNIT
RAK-35RPC RAC-35WPC
OUTDOOR UNIT
47
56
66
RAC-35WPC，RAC-50WPC（HHAW NO.0097E）
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