Hitachi RAM-130QH5 Service Manual
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Hitachi RAM-130QH5 Service Manual

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SERVICE MANUAL

TECHNICAL INFORMATION

FOR SERVICE PERSONNEL ONLY
RAM-130QH5
NOTE:
This manual describes only points that differ from RAF-25, 35,
50NH5, RAD-25, 35NH5, RAD-25, 35NH5 and RAM-80QH5 (TC
No. 0771EF), RAI-25, 35NH5 (PM No. 0271E), RAI-50NH5 and
RAC-50NH5 (PM No. 0274E), RAK-18, 25, 35NH5 (PM No.
0269E), RAK-50NH5 and RAC-50NH5 (PM No. 0302E) for items
not described in this manual.
TYPE
MODEL
POWER SOURCE
TOTAL INPUT
TOTAL AMPERES
DIMENSIONS
(mm)
NET WEIGHT
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

ROOM AIR CONDITIONER

Refrigeration & Air-Conditioning Division
MARCH 2007
(W)
(A)
(kW)
(B.T.U.)
W
H
D
(kg)
OUTDOOR UNIT
NO. 0365E
PM
RAM-130QH5
REFER TO THE FOUNDATION MANUAL

SPECIFICATIONS ------------------------------------------------------------------- 5

Installation ---------------------------------------------------------------------- 13
Construction And Dimensional Diagram ---------------------- 17
Main Parts Component --------------------------------------------------- 18
CAPACITY DIAGRAM ------------------------------------------------------------- 20
Wiring Diagram ----------------------------------------------------------------- 25
Circuit Diagram ---------------------------------------------------------------- 27
Block Diagram ------------------------------------------------------------------ 33
Basic Mode ------------------------------------------------------------------------ 35
Refrigerating Cycle Diagram ---------------------------------------- 55
Description Of Main Circuit Operation ------------------------ 57
Trouble Shooting ------------------------------------------------------------ 88
Disassembly And Reassembly ----------------------------------------- 95
Parts List And Diagram --------------------------------------------------- 98
DC INVERTER DUAL SYSTEM MULTI
OUTDOOR UNIT
RAM-130QH5
1ø, 220 - 240V, 50Hz
REFER TO THE SPECIFICATIONS PAGE
855
1450
308
113
CONTENTS
After installation

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  • Page 1: Service Manual

    NO. 0365E RAM-130QH5 SERVICE MANUAL REFER TO THE FOUNDATION MANUAL TECHNICAL INFORMATION CONTENTS FOR SERVICE PERSONNEL ONLY SPECIFICATIONS ------------------------------------------------------------------- 5 INSTALLATION ---------------------------------------------------------------------- 13 CONSTRUCTION AND DIMENSIONAL DIAGRAM ---------------------- 17 MAIN PARTS COMPONENT --------------------------------------------------- 18 CAPACITY DIAGRAM ------------------------------------------------------------- 20 WIRING DIAGRAM ----------------------------------------------------------------- 25...
  • Page 2 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.
  • Page 3 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).
  • Page 4 (6) Use a three wire type soldering iron including a grounding wire. Metal plate (of aluminium, stainless steel, etc.) Working table Resistor of 1 M (1/2W) Staple Earth wire Bare copper wire (for body earth) Fig. 3. Grounding of the working table Soldering iron Grounding wire...
  • Page 5 CAUTION 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. 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.

  • Page 6: Specifications

    SPECIFICATIONS MODEL RAM-130QH5 FAN MOTOR 40 W FAN MOTOR CAPACITOR FAN MOTOR PROTECTOR COMPRESSOR JU1013D2 COMPRESSOR MOTOR CAPACITOR OVERLOAD PROTECTOR OVERHEAT PROTECTOR FUSE (for MICROPROCESSOR) 5.0A POWER RELAY POWER SWITCH TEMPORARY SWITCH SERVICE SWITCH TRANSFORMER VARISTOR 450NR NOISE SUPPRESSOR THERMOSTAT...
  • Page 7 SPECIFICATIONS FOR INDOOR UNITS COMBINATION TYPE DC INVERTER SIX SYSTEM MULTI COOLING AND HEATING MODEL OUTDOOR UNIT RAM-130QH5 PHESE/VOLTAGE/FREQUENCY 1ø, 220 - 240V, 50Hz CIRCUIT AMPERES TO CONNECT (A) 12.60 (1.50 - 13.20) CAPACITY (kW) (B.T.U./h) 43,010 (5,120 - 45,060)
  • Page 8 SIX ROOM SYSTEM MULTI R.A.C. RAM-130QH5 COOL / HEAT CAPACITY SPEC. FOR INDOOR UNITS COMBINATIONS TO BE ABLE TO OPERATE SIMULTANEOUSLY Whichever indoor units are installed, cooling and heating capacity depends on how many and which indoor units are operating at that time.
  • Page 9 SIX ROOMS SYSTEM MULTI R.A.C. RAM-130QH5 INDOOR UNITS COMBINATIONS TO BE ABLE TO INSTALL Four or more indoor units can be installed with one outdoor unit. And total nominal cooling capacity should not be more than 18.0kW NOMINAL CAPACITY (kW)
  • Page 10 SIX ROOM SYSTEM MULTI R.A.C. RAM-130QH5 CONNECTING POSISION TO BE ABLE TO INSTALL – 11 –...

  • Page 11: Installation

    INSTALLATION PIPE LENGTH (1) Total 45m maximum pipe length for each refregrant cycle (upper cycle and lower cycle). (2) Pipe length for one indoor unit : maximum 25m. Indoor unit 1 Indoor unit 4 Indoor unit 5 Indoor unit 6 Indoor unit 2 Indoor unit 3 Outdoor unit (L1 + L2 + L3) = (L4 + L5 + L6) = Maximum 45m...

  • Page 12: Connecting The Pipe

    MODEL: RAM-130QH5 Flare adaptor for piping One unit of 1.8kW, 2.5kW or 3.5kW The flare adaptor for piping is CAUTION required depending on combination One unit of 1.8kW, 2.5kW or 3.5kW of indoor units. • This outdoor unit contain 2 difference refrigerant cycle with two compressors •...
  • Page 13 1. Remove flare nut from service valve. 2. Apply refrigerant oil to flare nut sections of servicevalve and pipings. 3. Match center of piping to large diameter side service valve and tank assembly, and tighten flarenut first by hand, then securely tighten using torque wrench. 4.
  • Page 14 Connection of the connecting cords and power cord. (Outdoor unit) RAM-130QH5 WARNING Connecting cord should be connected according to Fig.1, that the Indoor unit No. shall match with terminal board No. • of Outdoor unit. • Be sure to fix the connecting cord with the band as shown below. Otherwise water leakage causes short circuit or faults.

  • Page 15: Construction And Dimensional Diagram

    CONSTRUCTION AND DIMENSIONAL DIAGRAM MODEL RAM-130QH5 Indoor unit 1 Service valve (ø6.35) Indoor unit 1 Service valve (ø9.52) Indoor unit 2 Service valve (ø6.35) Indoor unit 2 Service valve (ø9.52) 1416 1450 Indoor unit 3 Service valve (ø6.35) Indoor unit 3 Outlet Service valve (ø9.52)

  • Page 16: Main Parts Component

    MAIN PARTS COMPONENT FAN MOTOR Fan Motor Specifications MODEL RAM-130QH5 POWER SOURCE DC : 140-330V OUTPUT 140-330V CONNECTION 0-6V 0-15V (Control circuit built in) 20˚C — (68˚F) RESISTANCE VALUE 75˚C — (167˚F) BLU : BLUE YEL : YELLOW BRN : BROWN...
  • Page 17 COMPRESSOR Compressor Motor Specifications MODEL RAM-130QH5 COMPRESSOR MODEL JU1013D2 PHASE SINGLE RATED VOLTAGE DC: 280-330V RATED FREQUENCY 50Hz POLE NUMBER WHITE CONNECTION YELLOW 25°C 2M = 1.063 (68°F) RESISTANCE VALUE 75°C 2M = 1.268 (167°F) WHITE YELLOW – 19 –...

  • Page 18: Capacity Diagram

    CAPACITY DIAGRAM (RELATED TO THE AMBIENT TEMPERATURE) MODEL : RAM-130QH5 COOLING CAPACITY ( ROOM TEMPERATURE 27˚C ) WHEN SIX INDOOR UNITS OPERATE RATING CAPACITY 12. 64 12. 60 11. 70 11. 90 6000 4480 4190 4060 4000 3530 2480 2000 AMBIENT TEMP (˚C)
  • Page 19 CAPACITY DIAGRAM (RELATED TO THE AMBIENT TEMPERATURE) MODEL : RAM-130QH5 HEATING CAPACITY ( ROOM TEMPERATURE 20˚C ) WHEN SIX INDOOR UNITS OPERATE 16. 0 MAX CAPACITY 14. 0 OUTDOOR UNIT RATING WITHOUT FROST CAPACITY 12. 0 10. 0 8. 0...
  • Page 20 CAPACITY DIAGRAM (RELATED TO THE PIPING LENGTH) MODEL : RAM-130QH5 – 22 –...
  • Page 21 SOUND PRESSURE LEVEL MODEL : RAM-130QH5 (Heating) APPROXIMATE THRESHOLD HEARING CONTINUROUS NOISE 1000 2000 4000 8000 [ H z ] O c t a v e b a n d M a i n w a v e l e n g t h...
  • Page 22 SOUND PRESSURE LEVEL MODEL : RAM-130QH5 (Cooling) APPROXIMATE THRESHOLD HEARING CONTINUROUS NOISE 1000 2000 4000 8000 [ H z ] O c t a v e b a n d M a i n w a v e l e n g t h...

  • Page 23: Wiring Diagram

    WIRING DIAGRAM MODEL RAM-55QH5 OUTDOOR UNIT 2 OUTDOOR UNIT 1 LEGEND BLU : BLUE GRY : GRAY BLK : BLACK YEL : YELLOW ORN : ORANGE PNK : PINK BRN : BROWN GRN : GREEN VIO : VIOLET WHT : WHITE RED : RED CAUTION The marked parts...

  • Page 24: Circuit Diagram

    CIRCUIT DIAGRAM Remote Control Key matrix table Output Input Door open Start/Stop Operation selection Fan speed selection Automatic swing Door shut Start/Stop Super silent cooling – – SEG5 SEG20 Door open On timer Hour up Hour down present time • SEG0 SEG19 SEG18...
  • Page 25 6V01 – 29 –...
  • Page 26 – 31 –...

  • Page 27: Block Diagram

    BLOCK DIAGRAM single phase 50Hz, 220-240V Outdoor Unit 1 Outdoor Unit 2 compressor compressor System System Magnetic relay Magnetic relay Power Power Module Module Inrush current Inrush current protection relay protection relay Rotor position SPM driver Rotor position SPM driver detector detector EEPROM...
  • Page 28 – 35 –...
  • Page 29 MODEL RAK-18NH5 RAK-25NH5 RAK-35NH5 RAK-50NH5 REQUIRED VALUE REQUIRED VALUE REQUIRED VALUE REQUIRED VALUE PROM LABEL NAME OF UNIT SIDE OF UNIT SIDE OF UNIT SIDE OF UNIT SIDE RTOTSA ˚C ˚C 2.00 ˚C 2.00 ˚C WMAX _ M 5300 5300 5000 4500 WMAX2 _ M...
  • Page 30 Table 1 Fan speed by mode RAF-25NH5 RAF-35NH5 RAF-50NH5 MODEL REQUIRED VALUE REQUIRED VALUE REQUIRED VALUE N O . LABEL NAME Operation OF UNIT SIDE OF UNIT SIDE OF UNIT SIDE Fan speed mode Label name mode 09C RTOTSA 2.00 ˚C 2.00 ˚C 2.00 ˚C WMAX _ M...
  • Page 31 MODEL RAD-25NH5 RAD-35NH5 REQUIRED VALUE REQUIRED VALUE PROM LABEL NAME OF UNIT SIDE OF UNIT SIDE RTOTSA 2.00 ˚C 2.00 ˚C WMAX _ M 5300 5000 WMAX2 _ M 5300 5000 WSTD _ M 4000 4000 WJKMAX _ M 3600 3700 WBEMAX _ M 3200...
  • Page 32 MODEL RAM-130QH5 PROM NO. LABEL NAME REQUIRED VALUE OF UNIT SIDE PSTARTC1$ pulse PSTARTC1K$ pulse PSTARTC2$ pulse PSTARTC2K$ pulse PSTARTC3$ pulse PSTARTC3K$ pulse PSTARTH1$ pulse PSTARTH1S$ pulse PSTARTH2$ pulse PSTARTH2S$ pulse PSTARTH3$ pulse PSTARTH3S$ pulse PMIN$ pulse DFCTPS$ pulse DFCTPN$...
  • Page 33 [Outdoor temperature >STAROTP_C] TSKTM1_C1 [Outdoor temperature ≤STAROTP_C] TSKTM1_C2 – 41 –...
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  • Page 38 MODEL RAM-130QH5 Expansion valves The expansion valves are initialized when power is supplied. The valve for unit 1 is fully closed (–520 pulses), and then that for unit 2 is fully opened (480 pulses). The valve for unit 2 is fully closed (–520 pulses), and then that for unit 3 is fully opened (480 pulses).
  • Page 39 Unit being operated : [DFCTPS] 30 seconds before balancing period is finished Synchronized with step-up of rotation speed of compressor, opened by [DFSPPS] pulses and reaches MAX opening degree [DEFSMX] when rotation speed of compressor reaches [DEFMAX]. RAM-130QH5 DEFROST TEMPERATURE DEFROST TEMPERATURE DEFROST...
  • Page 40 MAX opening degree [DEFSMX] when rotation speed of compressor reaches [DEFMAX]. Note Shifted to auto-fresh in defrost mode when operation is stopped. All indoor units must be stopped to fulfill condition for auto-fresh. MODEL RAM-130QH5 If signal is delayed, auto-fresh condition will not be established. Defrosting signal Unit 1/4...
  • Page 41 MODEL RAM-130QH5 FORCED COOLING In order to accumulate refrigerant, units operate in cooling cycle. Execution condition and operation status are shown below. [Execution condition] With neither indoor unit 1, 2, 3, 4, 5 and 6 not operated, when forced cooling switch is turned ON, forced cooling will be performed.
  • Page 42 MODEL RAM-130QH5 PROCESSING AT OVERHEAT THERMISTOR (OH) HIGH TEMPERATURE Restriction Start Conditions If any expansion valve is operated at 480 pulses and the OH temperature > [NDOWN_ON], the compressor speed will be reduced at a rate of 100 min /30 seconds.

  • Page 43: Refrigerating Cycle Diagram

    REFRIGERATING CYCLE DIAGRAM RAM-130QH5 Cooling, Dehumidifying, Defrosting Outdoor Unit Indoor Unit ø12.7 Silencer Suction tank Service Single-ended valve ( Upper Side 3/8" Reversing union ( 3/8" valve Charge port ( 1/2" Refrigerant Cycle ø12.7 ø9.52 ø12.7 Strainer Service Single-ended valve ( ø12.7...
  • Page 44 REFRIGERATING CYCLE DIAGRAM RAM-130QH5 Heating Outdoor Unit Indoor Unit ø12.7 Silencer Suction tank Service Single-ended valve ( Upper Side 3/8" Reversing union ( 3/8" valve Charge port ( 1/2" Refrigerant Cycle ø12.7 ø9.52 ø12.7 Strainer Service Single-ended valve ( ø12.7 3/8"...

  • Page 45: Description Of Main Circuit Operation

    DESCRIPTION OF MAIN CIRCUIT OPERATION RAM-130QH5 Power Circuit Fig. 1-1 This circuit full-wave rectifies 220-240 AC applied between terminals L and N, and boosts it to a required voltage with the active module, to create a DC voltage. These rectify the 220-240V AC from terminals L and N to a DC power supply.
  • Page 46 SPM (SYSTEM DIODE STACK POWER MODULE) SERVICE SWITCH SMOOTHING 2P TERMINAL BOARD CAPACITOR OUTDOOR ÇO?E?E?E?E?EÇ` UNIT 1 SWITCHING CONTROL P.W.B POWER P.W.B REACTOR SELF-DIAGNOSIS LAMPS SPM (SYSTEM POWER MODULE) DIODE STACK SMOOTHING 2P TERMINAL BOARD CAPACITOR SERVICE SWITCH OUTDOOR ÇO?E?E?E?E?EÇ` UNIT 2 SWITCHING REACTOR...
  • Page 47 – 59 –...
  • Page 48 Fig. 2-1 shows the interface circuit used for the indoor and outdoor microcomputers to communicate with ● each other. R813 R812 C802 Q803 R810 IF transmit output (SDO) C804 R811 Micro computer C821 R821 IF receive input (SDI) I/F 0V C822 D101 Terminal board...
  • Page 49 0.7V Base of outdoor P.W.B Q801, Q802 , Q803 Outdoor micro computer lndoor micro computer SDO Pin SDI Pin 35V DC line 33ms. 100ms. 1 frame Leader Fig. 2-2 Voltages Waveforms of indoor / Outdoor Micro computers (Outdoor to Indoor Communications) Base of outdoor P.W.B Q801, Q802 Outdoor micro computer lndoor micro computer SDO Pin...
  • Page 50 3. System power Module Circuit – 62 –...
  • Page 51 Upper arm transistor Time Lower arm transistor V – – U – Fig. 3-2 Switching order of power module transistor chopped U transistor ON Voltage point 320-360V Chopping period Upper arm transistor Current at Fig. 3-3 Voltage waveform at each point –...
  • Page 52 System Power Module 320-360V DC compressor motor U coil – – V coil – W coil DC current (Id) detection resistor Fig. 3-4 System Power module circuit (U + is OFF, V – is ON) SPM (SYSTEM DIODE STACK POWER MODULE) SERVICE SWITCH SMOOTHING 2P TERMINAL BOARD...
  • Page 53 4. Power Supply Circuit Fig. 4-1 shows the power circuit. ● Fig. 4-1 Power circuit for P.W.B. There are two switching power supply in Power PWB. ● Switching power supply 1 is generating the secondary power for control circuits and DC35V indoor unit 1. ●...
  • Page 54 – 66 –...
  • Page 55 5. Reversing valve control circuit Fig. 5-1 – 67 –...
  • Page 56 6. Rotor magnetic pole position detection circuit lnverter DC brushless motor for compressor R502 +12V R505 R504 R503 R501 R604 R603 R602 R601 R605 C605 R606 C606 R607 R608 R609 R610 C607 R611 Fig. 6-1 Rotor magnetic pole position detection circuit –...
  • Page 57 7. Peripheral circuit of microcomputer Fig. 7-1 shows the microcomputer and its peripheral circuits. ● Table 7-1, the basic operations of each circuit block, and Fig. 7-2, the system configuration. C224 Outdoor R290 Microcomputer Q209 Q205 (AX-6V01) R291 Reset terminal DC current Detection resistor R245...
  • Page 58 8. Overload control circuit (OVL control circuit) Fig. 8-1 Overload Control System Configuration Fig. 8-2 – 70 –...
  • Page 59 9. Reset circuit +12V ZD201 R292 Microcomputer C224 R290 AX-6V01 R291 Q205 Q209 R293 R294 C223 R295 To trip signal composing circuit Fig. 9-1 [ outdoor unit 1or outdoor unit 2 ] 12V line 5V line Reset voltage Time 12V line 5V line Reset voltage Time...
  • Page 60 10. Temperature Detection Circuit The outdoor units (at PWB OUTDOOR ELECTRICAL UNIT 1 and 2) provides with the outdoor temperature ● thermistor, DEF (defrost) thermistor, OH (overheat) thermistor and electric expansion valve thermistor so that they detect the temperatures of the unit and control the system. The circuit of the thermistors is shown as Fig.
  • Page 61 Table 10-1 Name and Role of each thermistor Name Connector No Measuring Point Role If the temperature of the compressor OH thermistor C N 5 Compressor head rises abnormally (118˚C), the compressor will be stopped. The temperature is used to decide the operation of the valve.
  • Page 62 When the connectors of the thermistors are disconnected or the thermistors is open or short, LD301 (red) lights and LD302 (red) blinks so that they indicate troubled parts. Combinations of LD301 and LD302 are set up for indicating troubled thermistors. The correspondences between the number of blink time and troubled parts are shown as Table 10-3. Look in the table (LD301 and LD302 blink) for troubled parts, and if the disconnections of them are checked out, they are replaced.
  • Page 63 11. Electric expansion valve Table 11-1 The electric expansion valve is driven by DC 12V. Power is supplied to 1 or 2 phases of 4-phase winding ● to switch magnetic pole of winding in order to control opening degree. Relationship between power switching direction of phase and open/close direction is shown below. ●...
  • Page 64 12. Power Factor Control Circuit Power factor is controlled by almost 100%. (Effective use of power) With IC in ACT module, control is performed so that input current waveform will be similar to waveform of input voltage. I (input current) input voltage V (input voltage) Effective...
  • Page 65 INSPECTING OUTDOOR ELECTRICAL PARTS Check to see that the LED is either on or blinking outdoor electrical unit 1 and electrical unit 2. Carry out inspections by examining the on/blinking status of LEDs 301-304. LED number LD301 LD302 LD303 LD304 Status Checkpoints Name...
  • Page 66 Inspection method 1 LED on Insert the power source, and check to see that the Follow "Inspecting external electrical parts" and check LED is on at electrical unit 1 or electrical unit 2. the cause of the problem. LED off Connect a commercial-use 220-240V power source Is AC220~240V flow to the L/N (A/B) terminal? to the L/N (A/B) terminal.
  • Page 67 Inspection method 2 Check the number of times LD301 blinks. LD301: Blinks once The power source or some other reason may have caused the microcomputer Reset stop to reset. Replace the control P.W.B. if the LED blinks once and then stops frequently during operation.
  • Page 68 Outdoor fan rotates LD301: Blinks five times Insert the power source and operate, and then check to see that the outdoor fan is Overload stop rotating Outdoor fan rotates, but soon stops. The protection circuit may cause the fan to stop when Replace the fan motor.
  • Page 69 O.K. AC196V-265V LD301: Blinks ten times Check the power source voltage Check the wiring (diode stack (terminal board, L/N terminal) Power source voltage blue/yellow/gray/red) abnormally abnormally noise N.G. AC196V or less or AC265V or more Danger! Quickly turn off the power Less than AC196V Power source abnormally.
  • Page 70 LD302 : Blink 4 times Narrow pipe thermistor #1 failure OR Narrow pipe thermistor #4 failure LD302 : Blink 5 times Wide pipe thermistor #1 failure OR Wide pipe thermistor #4 failure LD302 : Blink 6 times Narrow pipe thermistor #2 failure OR Narrow pipe thermistor #5 failure LD302 : Blink 7 times...
  • Page 71 Inspection method 4 Check the light status of LD304 Check C1/D1 or LD304 : Blink 1 time Replace C4/D4 voltage MAIN P.W.B. Communication error of OK=DC32 to 37V Indoor #1 or Indoor #4 Replace Check C1/D1 or C4/D4 connection POWER P.W.B. Correct C1/D1 or C4/D4 connedtion Restart operation and...

  • Page 72: How To Operate The Outdoor Unit Independently

    HOW TO OPERATE USING THE SERVICE SWITCH THE OUTDOOR UNIT Open the top cover 1. Turn the Power switch off and then turn on again. 2. Remove the electrical parts cover. 3. Press the service switch for one second or more (wait for at least 30 seconds after turning the power source switch on).

  • Page 73: Trouble Shooting

    TROUBLE SHOOTING Model RAM-55QH5 RAM-65QH5 PRECAUTIONS FOR CHECKING Power source 1 ø 220-240V, 50Hz DANGER 1. Remember that the 0V line is biased to 162V in reference to the ground level. 2. Also note that it takes about 10 minutes until the voltage fall after the power switch is turned off.
  • Page 74 Discharge procedure and how to cut off power to power circuit Caution DANGER Voltage of about 360V is charged at both ends of smoothing capacitor 330 μ F x 3. ● High voltage (DC 360V) is also charged at screw and terminal sections of system power module. ●...
  • Page 75 Lighting mode self-diagnosis lamp RAM-130QH5 Location of self-diagnosis lamp ÇPÇR ÇPÇS ÇPÇR ÇPÇS – 90 –...
  • Page 76 Lighting mode self-diagnosis lamp RAM-130QH5 SERVICE SWITCH MAIN P.W.B. BLINKING TIMES CORRESPONDENCE TABLE FOR ABNORMAL THERMISTRO 1 TIME OVER HEAT THERMISTOR 2 TIMES DEFROST THERMISTOR 3 TIMES OUTDOOR TENOERATYRE THERMISTOR 4 TIMES NARROW PIPE THERMISTOR (INDOOR 1 OR INDOOR 4)
  • Page 77 TROUBLESHOOTING OF THE SYSTEM POWER MODULE – 92 –...
  • Page 78 – 93 –...
  • Page 79 – 94 –...
  • Page 80 MODEL RAM-130QH5 Fig. 1 SMOOTHING SPM (SYSTEM POWER MODULE) CAPACITOR Fig. 5 2P TERMINAL DIODE STACK BOARD SERVICE SWITCH ‚ O E E E E E‚ ` SWITCHING CONTROL P.W.B. REACTOR POWER P.W.B. SELF-DIAGNOSIS LAMPS – 95 –...
  • Page 81 (3) Cut off the three pipes at the side and bottom of Reversing valve. Fig. 3 ELECTRIC EXPANSION VALVE & PIPE THERMISTOR POSITION CHARTS MODEL RAM-130QH5 FOR INDOOR UNIT 1/UNIT 4) FOR INDOOR UNIT 1/UNIT 4) FOR INDOOR UNIT 1/UNIT 4)

  • Page 82: Parts List And Diagram

    PARTS LIST AND DIAGRAM MODEL RAM-130QH5 – 97 –...
  • Page 83 – 98 –...
  • Page 84 HITACHI PM NO. 0000 RAM-130QH5 Printed in Malaysia...

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