Hitachi RAM-130QH5 Service Manual Download Page 73

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– 88 –

TROUBLE SHOOTING

Model

RAM-55QH5
RAM-65QH5

PRECAUTIONS FOR CHECKING

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.

Across a – b (0V line)....................

Across a – ground..........................

Across b (0V line)– ground............

approx 360V

approx 155-170V

When using an
oscilloscope, never
ground it. Don't forget
that high voltages as
noted above may
apply to the
oscilloscope.

DANGER

Power source
1 ø 220-240V, 50Hz

(B)

(A)

DANGER !
Don't install
the ground line

Always keep your
hands and metallic
things away the
enclosure of the
scilloscop

outdoor unit 1 P.W.B

outdoor unit 2 P.W.B

Summary of Contents for RAM-130QH5

Page 1: ...IPTION OF MAIN CIRCUIT OPERATION 57 TROUBLE SHOOTING 88 DISASSEMBLY AND REASSEMBLY 95 PARTS LIST AND DIAGRAM 98 RAM 130QH5 After installation 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 item...

Page 2: ... 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 mo...

Page 3: ...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 bo...

Page 4: ...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...

Page 5: ...cuit 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...

Page 6: ...S YES 5 0A G4A NO NO YES NO 450NR YES YES IC NO 1650g 1650g WITHOUT REFRIGERANT BECAUSE COUPLING IS FLARE TYPE UNIT PIPES REFRIGERANT CHARGING VOLUME Refrigerant 410A RAM 130QH5 JU1013D2 This outdoor unit has two separated refrigerant cycle with two compressors which indoor units 1 2 3 are for upper refrigerant cycle and indoor units 4 5 6 are for lower refrigerant cycle In case the total pipe len...

Page 7: ...OR MAXIMUM LENGTH OF PIPING STANDARD RAM 130QH5 1ø 220 240V 50Hz 30 12 60 1 50 13 20 43 010 5 120 45 060 4 190 200 4 400 10 26 19 2 17 6 99 14 40 1 50 14 40 49 140 5 120 49 140 3 800 200 4 220 12 93 17 40 16 00 99 MAX 45m EACH CYCLE CE EMC LVD RAM 130QH5 MODEL W PACKING mm H D cu ft 1 070 1 590 450 27 04 130 GROSS WEIGHT kg 6 35D 9 52DX6 FLARENUTSIZE SMALL LARGE INDOOR SUCTION TEMPERATURE C COOLIN...

Page 8: ... REATING KW RANGE HEATING OUTDOOR UNIT POWER CONSUMPTION W COP AMPERE A at 230V 7 FIVE UNITS SIX UNITS Four indoor units should be connected at least ONE UNIT INDICATED ARE ONLY FOR ONE UNIT OPERATION WHEN FOUR INDOOR UNITS OR MORE ARE CONNECTED TWO UNITS INDICATED ARE ONLY FOR TWO UNITS OPERATION WHEN FOUR INDOOR UNITS OR MORE ARE CONNECTED THREE UNITS INDICATED ARE ONLY FOR THREE UNITS OPERATION...

Page 9: ... 00 2 80 1 10 4 70 11 17 14 18 RAI 25NH5 2 5 1 00 2 80 1 10 4 70 11 17 14 18 RAK 35NH5 RAK 35NH6 3 5 1 00 3 90 1 10 5 80 16 24 17 22 RAF 35NH5 3 5 1 00 3 90 1 10 5 80 16 24 17 22 RAD 35NH5 RAD 35NH7 3 5 1 00 3 90 1 10 5 80 16 24 17 22 RAI 35NH5 3 5 1 00 3 90 1 10 5 80 16 24 17 22 RAK 50NH5 RAK 50NH6 5 0 1 00 5 60 1 10 7 20 23 34 23 29 RAF 50NH5 5 0 1 00 5 60 1 10 7 20 23 34 23 29 RAI 50NH5 5 0 1 0...

Page 10: ... 11 SIX ROOM SYSTEM MULTI R A C RAM 130QH5 CONNECTING POSISION TO BE ABLE TO INSTALL ...

Page 11: ...alue of capacity from 5 0kW to 9 0kW for each refregrant cycle upper cycle and lower cycle Make sure to connect to two or three indoor units for each refregerant cycle Indoor unit 5 Indoor unit 6 Indoor unit 4 Indoor unit 2 Indoor unit 3 Indoor unit 1 Outdoor unit L1 L2 L3 Indoor unit 2 Indoor unit 3 Indoor unit 1 Outdoor unit L4 L5 L6 Indoor unit 5 Indoor unit 6 Indoor unit 4 L1 L2 L3 L4 L5 L6 Ma...

Page 12: ...s shown below The space indicated with a mark is required to guarantee the air conditioner s performance Install the airconditioner in a place big enough to provide ample space for servicing and repairs later on 507 10 10 320 340 198 12 37 57 One unit of 1 8kW 2 5kW or 3 5kW One unit of 1 8kW 2 5kW or 3 5kW One unit of 1 8kW 2 5kW or 3 5kW One unit of 1 8kW 2 5kW or 3 5kW One unit of 1 8kW 2 5kW 3...

Page 13: ... leak inspection 2 Apply refrigerant oil to flare nut sections of servicevalve and pipings 5 Wrap the provided insulating material around sidepiping using vinyl tape 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 Install the outdoor unit on a stable flat surface and check to see that the c...

Page 14: ...ted part of the wire using the cord band Do not exert pressure on the wire as this may cause overheating or fire Screw for ground earth screw Outdoor Unit Wiring Pattern Indoor Unit Power cord C D C1 D1 Indoor unit No 1 Screw for ground earth screw Screw for ground earth screw For Indoor unit No 1 Terminal board Terminal board Connecting cord Ø1 6 or 2 0 Green and Yellow C D C2 D2 Indoor unit No 2...

Page 15: ...connection please refer to the installation manual Air Outlet Holes for anchor bolt More than 700 More than 100 More than 100 More than 100 855 1416 1450 79 308 201 22 50 46 563 62 60 26 50 353 28 50 408 Notch for anchor bolt 2 ø12 Notchs Indoor unit 1 Service valve ø6 35 Indoor unit 2 Service valve ø6 35 Indoor unit 3 Service valve ø6 35 Indoor unit 1 Service valve ø9 52 Indoor unit 2 Service val...

Page 16: ...MODEL POWER SOURCE OUTPUT BLU BLUE YEL YELLOW BRN BROWN WHT WHITE GRY GRAY ORN ORANGE GRN GREEN RED RED BLK BLACK PNK PINK VIO VIOLET RAM 130QH5 DC 140 330V 40W RESISTANCE VALUE 20 C 68 F 75 C 167 F M RED BLK WHT YEL BLU Control circuit built in 140 330V 15V 0V 0 6V 0 15V ...

Page 17: ...D VOLTAGE RATED FREQUENCY POLE NUMBER COMPRESSOR Compressor Motor Specifications CONNECTION 25 C 68 F 75 C 167 F RESISTANCE VALUE 2M 1 063 2M 1 268 RAM 130QH5 JU1013D2 SINGLE DC 280 330V 50Hz 4 U V W M M M WHITE YELLOW RED WHITE RED YELLOW ...

Page 18: ...ROOM TEMPERATURE 27 C INDOOR UNITS OPERATE 10 8 6 4 2 0 6000 4000 2000 INPUT W AMBIENT TEMP C COOLING CAPACITY kW 0 20 25 30 35 40 45 11 90 2480 3530 4060 4190 4480 12 64 13 12 60 11 70 CAPACITY DIAGRAM RELATED TO THE AMBIENT TEMPERATURE MODEL RAM 130QH5 ...

Page 19: ... WHEN SIX INDOOR UNITS OPERATE HEATING CAPACITY ROOM TEMPERATURE 20 C 0 0 0 7 0 C 5 5 C 8 5 C 1000 2000 4000 3000 5000 2 0 4 0 6 0 8 0 10 0 12 0 14 0 16 0 INPUT W AMBIENT TEMP C HEATING CAPACITY kW 15 10 5 0 5 10 15 CAPACITY DIAGRAM RELATED TO THE AMBIENT TEMPERATURE MODEL RAM 130QH5 ...

Page 20: ... 22 CAPACITY DIAGRAM RELATED TO THE PIPING LENGTH MODEL RAM 130QH5 ...

Page 21: ...00 1000 2000 4000 8000 S o u n d L e v e l d B w a v e l e n g t h M a i n band O c t a v e H z p r e s s u r e APPROXIMATE THRESHOLD FOR NOISE CONTINUROUS HEARING NC 40 NC 20 NC 30 NC 50 NC 60 NC 70 SOUND PRESSURE LEVEL MODEL RAM 130QH5 Heating ...

Page 22: ...00 1000 2000 4000 8000 S o u n d L e v e l d B w a v e l e n g t h M a i n band O c t a v e H z p r e s s u r e APPROXIMATE THRESHOLD FOR NOISE CONTINUROUS HEARING NC 40 NC 20 NC 30 NC 50 NC 60 NC 70 SOUND PRESSURE LEVEL MODEL RAM 130QH5 Cooling ...

Page 23: ...RING DIAGRAM 25 CAUTION The marked parts are very important ones for safety LEGEND BLU BLUE GRY GRAY BLK BLACK YEL YELLOW ORN ORANGE PNK PINK BRN BROWN GRN GREEN VIO VIOLET WHT WHITE RED RED OUTDOOR UNIT 1 OUTDOOR UNIT 2 ...

Page 24: ...SEG1 SEG0 SEG43 SEG42 SEG41 SEG40 P40 P41 P42 P43 P00 P01 P02 P03 P10 P11 P12 P13 D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 BEEP P20 P30 P31 NCVL C1 VL C2 VL C3 XC IN XC OUT VDD X OUT X IN RESET CARR P23 P22 P21 VSS IC 1 M3455OM6A 504FP LCD 1 C8 50v 1u K 1 D3 RB425D 1 2 K2K3 K4 K5 P10 P11 P12 K6 K7 K8 K8 K10 K11K12 K18 K17 K15 K16 K13 K14 D0 D1 D2 D3 R1 100k SW1 R2 P 100k R3 100k R4 100k R5 Q1 2SC3443 or 2SC2...

Page 25: ... 29 6V01 ...

Page 26: ... 31 ...

Page 27: ...door unit 1 Indoor unit 2 Indoor unit 3 C1 D1 C2 D2 C3 D3 single phase 50Hz 220 240V Outdoor Unit 1 System Power Module Outdoor micro computer 6V01 Magnetic relay Inrush current protection relay M Rotor position detector Overload current detector SPM driver Overheat thermistor Defrost thermistor Outdoor temp thermistor Indoor Outdoor Interface 4 Indoor Outdoor Interface 5 Indoor Outdoor Interface ...

Page 28: ... 35 ...

Page 29: ...Med FWAH_M Set fan speed AUTO FWH_M Set fan speed HI FCAH_M Set fan speed AUTO FCH_M Set fan speed HI SHIFTW_M Fan speed AUTO Hi Med SFTSZW_M Fan speed Lo Sleep SHIFTC_M Cooling operation SHIFTD_M Dehumidifying operation min 1 720 min 1 750 min 1 780 120 WMAX_M min 1 5300 min 1 5300 min 1 5000 121 WMAX2_M min 1 5300 min 1 5300 min 1 5000 122 WSTD_M min 1 4000 min 1 4000 min 1 4000 123 WJKMAX_M min...

Page 30: ... 194 FCUDL_M 195 FCUDAH_M 196 FCUDH_M 197 FCUDHH_M 19D FWUDOPN_M 19E FCUDOPN_M 2 00 C 4500 min 1 4500 min 1 4000 min 1 4000 min 1 3700 min 1 4000 min 1 4000 min 1 3100 min 1 2800 min 1 2750 min 1 2500 min 1 1800 min 1 1100 min 1 800 min 1 800 min 1 1200 min 1 1100 min 1 500 min 1 1 0 3 min 2 33 C 0 66 C 0 66 C 0 66 C 30 00 C 23 00 C 2 00 C 9 00 C 1900 min 1 400 min 1 740 min 1 820 min 1 950 min 1 ...

Page 31: ...ft value FWS_M Lo Hi Hi Hi Hi FWKAF_M Overload FCSOY_M Sleep FWHH_M Ultra Hi FCS_M Lo FCL_M Med FDOY_M Sleep FCHH_M Ultra Hi FDS1_M Lo 1 FDS2_M Lo 2 FWL_M Med FWAH_M Set fan speed AUTO FWH_M Set fan speed HI FCAH_M Set fan speed AUTO FCH_M Set fan speed HI SHIFTW_M Fan speed AUTO Hi Med SFTSZW_M Fan speed Lo Sleep SHIFTC_M Cooling operation SHIFTD_M Dehumidifying operation V 20 5 V 20 5 120 WMAX_M...

Page 32: ...in 1 125 TSKTM1_W1 60 sec 126 SDRCT1_W2 3000 min 1 127 TSKTM1_W2 60 sec 128 SDSTEP 1000 min 1 129 TSKSPT 8 sec 12A KYO_RPM 3000 min 1 198 TDF414 90 sec 199 DFMXTM 12 min 1 19A SDRCT2 2000 min 1 19B TSKTM2 60 sec 19C DFSTEP 600 min 1 19D TDFSPT 60 sec 19E DEFMAX 6000 min 1 19F TDF415 120 sec 1A0 DFSTMB 55 min 1A1 DFSTMB2 60 min 1A2 DEFONH 1 9 C 1A3 DEFON 5 1 C 1A4 DEFONL 23 9 C 1A5 DEF_a1 112 128 1...

Page 33: ... 41 Outdoortemperature STAROTP_C TSKTM1_C1 Outdoortemperature STAROTP_C TSKTM1_C2 ...

Page 34: ... 43 ...

Page 35: ... 45 ...

Page 36: ... 47 ...

Page 37: ... 49 ...

Page 38: ...rical assembly with 2 separated micon Compressor rotation speed When the compressor is started the SDRCT1 speed TSTKTM1 second is held After the steady speed period is finished the speed increases at the rate of SDSTEP speed TSKSPT second until the target speed is resched Power Heating output Cooling output Compressor rotation speed Unit 1 4 Unit 2 5 Hold Hold Hold 500ms Hold 500ms Hold 500ms Hold...

Page 39: ...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 Compressor Balancing period for TDF414 seconds Starting of reversing cycle period by SDRCT2 min 1 for Released by condition 1 or 2 during reversing cycle period TDF415 ...

Page 40: ...uto fresh is applied indoor unit stopped last Compressor Accelerated by DFSTEP min 1 TDFSPT seconds and reaches defrost MAX speed DEFMAX Electric expansion valve 3 Failure occurred 12 minutes of defrost MAX time has elapsed 1 3 2 Shifted to auto fresh in defrost mode when operation is stopped Note 4 All indoor units must be stopped to fulfill condition for auto fresh If signal is delayed auto fres...

Page 41: ...operation of any unit is detected Power Heating output Service switch Cooling output Outdoor fan Turns on for Cooling Operation Power Compressor rotation speed upper lower In rush Prevention Compressor Power relay Electric expansion valve Main microcomputer Reversing valve Unit 1 4 Unit 2 5 Unit 3 6 Unit 1 4 Unit 2 5 Unit 3 6 Hold Hold Hold Approx 100ms 100ms 1sec 1sec 1sec 520 480 0 520 480 0 520...

Page 42: ...N_OFF OH temperature NDOWN_ON and the OH temperature does not rise from that 20 seconds before the reduction of compressor speed will not occur Restriction Release Condition in common for all When three units are operated for heating Operation with one unit in heating or cooling mode and with two units in cooling mode is the same as in the above diagram WMAX2 and MINRPM are EEPROM data Unit 1 4 Un...

Page 43: ...c expansion 3 valve Strainer Strainer Strainer Strainer Strainer Silencer Compressor ø6 35 Hot Pipe Single ended union 1 4 Upper Side Refrigerant Cycle Suction tank ø12 7 ø12 7 ø12 7 ø12 7 ø12 7 ø8 ø12 7 ø6 35 ø6 35 ø6 35 ø6 35 ø6 35 ø6 35 ø6 35 ø6 35 ø6 35 ø6 35 ø12 7 ø12 7 ø12 7 ø12 7 ø12 7 ø9 52 ø9 52 ø9 52 ø12 7 Reversing valve Strainer Strainer Strainer Service valve 1 4 Service valve 3 8 Ser...

Page 44: ...trainer Strainer Strainer Strainer Strainer Silencer Compressor ø6 35 Hot Pipe Single ended union 1 4 Upper Side Refrigerant Cycle Suction tank ø12 7 ø12 7 ø12 7 ø12 7 ø12 7 ø8 ø12 7 ø6 35 ø6 35 ø6 35 ø6 35 ø6 35 ø6 35 ø6 35 ø6 35 ø6 35 ø6 35 ø12 7 ø12 7 ø12 7 ø12 7 ø12 7 ø9 52 ø9 52 ø9 52 ø12 7 Reversing valve Strainer Strainer Strainer Service valve 1 4 Service valve 3 8 Service valve 3 8 Servic...

Page 45: ... 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: ...DIAGNOSIS LAMPS SWITCHING POWER P W B OUTDOOR UNIT 1 SMOOTHING CAPACITOR SPM SYSTEM POWER MODULE DIODE STACK SERVICE SWITCH 2P TERMINAL BOARD REACTOR CONTROL P W B SELF DIAGNOSIS LAMPS SWITCHING POWER P W B OUTDOOR UNIT 2 LD301 LD302 LD303 LD304 LD301 LD302 LD303 LD304 ÇO E E E E EÇ ÇO E E E E EÇ ÇPÇR ÇPÇS ÇPÇS ÇPÇR A B S S ...

Page 47: ... 59 5A ...

Page 48: ...ve input SDI Micro computer 5V 5V 5V 12V 5V 5V IC8 R283 Q201 5V 5V 5V HIC 5V R813 R812 C802 Q803 C804 R811 R810 SDO1 SDI1 73 68 0V L801 L811 C801 R802 Q801 5V R801 R803 D209 0V 0V 0V 0V 0V 0V 0V C805 NF COIL C802 C216 R263 R262 R261 R260 D206 C214 Q206 R254 R255 R258 R257 R256 R259 C806 C804 Interface relay 35V Communications from indoor micro computer to outdoor micro computer Communications from...

Page 49: ...5V 0V 5V 35V 35V 35V DC line Base of outdoor P W B Q801 Q802 Outdoor micro computer 69 11 Pin 68 Pin Pin SDI Pin 35V DC line 100ms Leader 33ms 1 frame 5 7 5ms Transmit receive switching time 33ms 1 frame Fig 2 2 Voltages Waveforms of indoor Outdoor Micro computers Outdoor to Indoor Communications Fig 2 3 Voltages Waveforms of indoor Outdoor Micro computers Indoor to Outdoor Communications ...

Page 50: ...on the positive side are called the upper arm and the three transistors on the negative side the lower arm A U U V W V W W V U U coil V coil W coil DC compressor motor System Power Module FUSE 25A Terminal board N L R004 C006 Noise filter coil R002 R24 Coil lnrush current protection relay Power relay 0 35mH ACT MODULE INVERTER Fig 3 1 System power module circuit U is ON V is ON A A B ...

Page 51: ...stor Lower arm transistor Time T U V W T U transistor chopped U transistor ON ON Voltage point Upper arm transistor Current at Chopping period 320 360V A B Fig 3 2 Switching order of power module Fig 3 3 Voltage waveform at each point ...

Page 52: ...IODE STACK SERVICE SWITCH 2P TERMINAL BOARD REACTOR CONTROL P W B SELF DIAGNOSIS LAMPS SWITCHING POWER P W B OUTDOOR UNIT 2 LD301 LD302 LD303 LD304 LD301 LD302 LD303 LD304 ÇO E E E E EÇ ÇO E E E E EÇ ÇPÇR ÇPÇS ÇPÇS ÇPÇR A B S S U U V W U V V W W _ System Power Module 320 360V R24 DC current Id detection resistor A U coil DC compressor motor V coil W coil B Fig 3 4 System Power module circuit U is ...

Page 53: ...r control circuits and DC35V indoor unit 1 Switching power supply 2 is generating the DC12V for expansion valve and DC35V for indoor unit 2 and 3 Switching power supply performs voltage conversion effectively by switching transistor IC1 to convert DC330V to high frequency of approximately 20kHz to 200kHz Transistor IC1 operates as follows Fig 4 1 Power circuit for P W B ...

Page 54: ... 66 ...

Page 55: ... 67 5 Reversing valve control circuit Fig 5 1 ...

Page 56: ...outdoor unit 5V 12V C607 IC3 C606 R601 R603 R604 C604 C603 C602 C601 R605 R606 R607 R611 R608 R609 R610 R501 R505 R504 R503 R502 R602 0V 0V 0V 0V C605 0V 4 5 6 7 3 11 12 8 9 1 2 13 14 10 V W U DC brushless motor for compressor lnverter Fig 6 1 Rotor magnetic pole position detection circuit ...

Page 57: ...ration R24 R245 Detection resistor DC current SPM terminal 0V 0V 12V 0V 5V 5V D205 R222 R221 C283 R247 R338 R110 R108 C105 C103 CT1 C282 Is D104 R249 0V 0V 0V 0V 0V 0V IC4 0V 0V SPM terminal R248 C281 Reset IP cutter Id AX 6V01 Outdoor Microcomputer 0V C224 5V Q209 Q205 C223 R293 R292 R294 ZD201 R295 R290 R291 Is 6 8 4 5 7 48 9 60 61 Fig 7 1 Peripheral circuit of microcomputer AX 6V01 ...

Page 58: ... 70 8 Overload control circuit OVL control circuit Fig 8 1 Overload Control System Configuration Fig 8 2 ...

Page 59: ...205 C223 C224 To trip signal composing circuit Microcomputer AX 6V01 R295 48 12V line 12V line 5V line 5V line Reset voltage Reset voltage 12 6 0 12 6 0 Voltage when power is turned OFF Voltage when power is turned ON Time Time Fig 9 1 outdoor unit 1or outdoor unit 2 Fig 9 2 ...

Page 60: ... 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 10 1 and their roles and temperature measuring points are shown as Table 10 1 Fig 10 1 Temperature Detection Circuit ...

Page 61: ...PE 1 Indoor unit 1 WIDE PIPE Electric expansion valve thermistor WIDE PIPE 2 Indoor unit 2 WIDE PIPE Electric expansion valve thermistor WIDE PIPE 3 Indoor unit 3 WIDE PIPE Electric expansion valve thermistor WIDE PIPE 4 Indoor unit 4 WIDE PIPE Electric expansion valve thermistor WIDE PIPE 5 Indoor unit 5 WIDE PIPE Electric expansion valve thermistor WIDE PIPE 6 Indoor unit 6 WIDE PIPE CN9 Connect...

Page 62: ...replacing the thermistor replace the control P W B because it malfunctions The OH thermistors are detecting the compressor head temperatures If the temperature rises over 118 C the compressor in the cycle will be stopped to protect itself and LD301 will blink 6 times OH STOP When the compressor temperature fells under 105 C the compressor will restart During OH STOP the fan continues to spin The o...

Page 63: ... pin with voltage that has not changed from around 0 9V or 12V expansion valve or microcomputer is defective Fig 11 2 shows logic waveform when expansion valve is operating 11 Electric expansion valve Pin Drive status Lear wire 1 ON OFF OFF OFF Pin No 12V 0 9V 200ms 75ms 50ms 42 38 41 37 40 36 39 35 ON ON OFF OFF ON OFF OFF ON OFF ON OFF OFF OFF ON ON OFF OFF OFF ON OFF OFF OFF ON ON OFF OFF OFF O...

Page 64: ...ll be similar to waveform of input voltage I input current V input voltage input voltage input current Effective voltage area Effective voltage area Invalid power area Even if voltage is applied current does not flow Assuming the same current capacity 20A power can be used about 10 effective comparing with curent use power factor of 90 and maximum capacity is thereby improved ...

Page 65: ...r source is unconnected Inspection method 1 Abnormally stop is shown by the number of times the LED blinks Inspection method 2 Thermistor abnormally is shown by the number of times the LED blinks Inspection method 3 In the case that an internal unit is Communications error is shown by the number of times the LED blinks not connected the number of connected internal units is shown by the number of ...

Page 66: ...rminal Follow Inspecting external electrical parts and check the cause of the problem Connect a commercial use 220 240V power source to the L N A B terminal Replace the broken part and the 25A fuse The control power source is broken Replace the control P W B Is varistor 2 broken There is the possibility that an irregular voltage has been flowing to the L N A B terminal Check to see that the power ...

Page 67: ...efore stopping There is the chance that the cycle load has become heavy and the compressor has come loose Check the compressor In this case the LED may blink twice before stopping Yes Yes Yes abnormally Takes several minutes to restart Restarts quickly every time Restarts quickly every time No abnormally The SPM2 may be broken Replace the SPM2 The SPM2 may be broken Replace the SPM2 Cable abnormal...

Page 68: ...s fourteen times ACT error Yes No LD301 Blinks thirteen times E2 PROM error The protection circuit may cause the fan to stop when the wind is extremely strong in the place where the outdoor unit is installed or when the outdoor unit is covered Refil the coolant Check the compressor NO CHANGE still same Replace MAIN P W B NO CHANGE still same Check the compressor Replace POWER P W B Replace the ele...

Page 69: ... check the voltage between the SPM P1 terminal and the N terminal Turn off the power source and ten minutes later remove the SPM CN13 cords Then check the DC voltage between the 1 pin of the SPM CN13 and the N terminal within three minutes of the power relay being turned on Block off the power source and return the yellow striped and blu striped wires to their former position Then remove the gray ...

Page 70: ...mistor 4 failure LD302 Blink 6 times Narrow pipe thermistor 2 failure OR Narrow pipe thermistor 5 failure LD302 Blink 7 times Wide pipe thermistor 2 failure OR Wide pipe thermistor 5 failure LD302 Blink 8 times Narrow pipe thermistor 3 failure OR Narrow pipe thermistor 6 failure LD302 Blink 9times Wide pipe thermistor 3 failure OR Wide pipe thermistor 6 failure ...

Page 71: ...6 voltage OK DC32 to 37V Check C1 D1 or C4 D4 connection Correct C1 D1 or C4 D4 connedtion OK NG OK NG OK NG OK NG OK NG Check C2 D2 or C5 D5 connection Check C3 D3 or C6 D6 connection Correct C3 D3 or C6 D6 connection Correct C3 D3 or C5 D5 connedtion LD304 Blink 2 times no yes Communication error of Indoor 2 or Indoor 5 LD304 Blink 3 times note If Indoor unit is not installed the correspond erro...

Page 72: ...ical unit 2 Be sure to return the service switch to ìnormalî after checking with service operation is completed OUTDOOR ELECTRICAL UNIT 1 OUTDOOR ELECTRICAL UNIT 2 LD301 LD302 LD303 LD304 LD301 LD302 LD303 LD304 ÇO E E E E EÇ ÇO E E E E EÇ ÇPÇR ÇPÇS ÇPÇS ÇPÇR A B B S S Service switch forced cooling mode is set by pressing for one second or more and stopped by pressing again 1 Connect the large dia...

Page 73: ...s turned off Across a b 0V line Across a ground Across b 0V line ground approx 360V approx 155 170V approx 155 170V When using an oscilloscope never ground it Don t forget that high voltages as noted above may apply to the oscilloscope DANGER DANGER Power source 1 ø 220 240V 50Hz B A DANGER Don t install the ground line Always keep your hands and metallic things away the enclosure of the scillosco...

Page 74: ...e stack Also be sure to perform discharging of smoothing capacitor Do not use soldering iron with transformer Doing so will blow thermal fuse inside transformer As shown left apply soldering iron to metal parts receptacles in sleeve corresponding to P and N1 terminals of system power module Discharge procedure and how to cut off power to power circuit DANGER WARNING Screws of system power module a...

Page 75: ...INAL BOARD REACTOR CONTROL P W B SELF DIAGNOSIS LAMPS SWITCHING POWER P W B OUTDOOR UNIT 1 SMOOTHING CAPACITOR SPM SYSTEM POWER MODULE DIODE STACK SERVICE SWITCH 2P TERMINAL BOARD REACTOR CONTROL P W B SELF DIAGNOSIS LAMPS SWITCHING POWER P W B OUTDOOR UNIT 2 LD301 LD302 LD303 LD304 LD301 LD302 LD303 LD304 ÇO E E E E EÇ ÇO E E E E EÇ ÇPÇR ÇPÇS ÇPÇS ÇPÇR A B S S ...

Page 76: ...TIMES DEFROST THERMISTOR 3 TIMES OUTDOOR TENOERATYRE THERMISTOR 4 TIMES NARROW PIPE THERMISTOR INDOOR 1 OR INDOOR 4 5 TIMES WIDE PIPE THERMISTOR INDOOR 1 OR INDOOR 4 6 TIMES NARROW PIPE THERMISTOR INDOOR 2 OR INDOOR 5 7 TIMES WIDE PIPE THERMISTOR INDOOR 2 OR INDOOR 5 8 TIMES NARROW PIPE THERMISTOR INDOOR 3 OR INDOOR 6 9 TIMES WIDE PIPE THERMISTOR INDOOR 3 OR INDOOR 6 ...

Page 77: ... 92 TROUBLESHOOTING OF THE SYSTEM POWER MODULE ...

Page 78: ... 93 ...

Page 79: ... 94 ...

Page 80: ...R P S OEEEEE LD304 LD303 LD302 LD301 SMOOTHING CAPACITOR SPM SYSTEM POWER MODULE DIODE STACK REACTOR SELF DIAGNOSIS LAMPS CONTROL P W B SERVICE SWITCH 2P TERMINAL BOARD SWITCHING POWER P W B MODEL RAM 130QH5 Fig 1 ...

Page 81: ...ELECTRIC EXPANSION VALVE PIPE THERMISTOR POSITION CHARTS MODEL RAM 130QH5 FOR INDOOR UNIT 1 UNIT 4 FOR INDOOR UNIT 3 UNIT 6 FOR INDOOR UNIT 3 UNIT 6 FOR INDOOR UNIT 2 UNIT 5 FOR INDOOR UNIT 2 UNIT 5 FOR INDOOR UNIT 1 UNIT 4 FOR INDOOR UNIT 1 UNIT 4 FOR INDOOR UNIT 2 UNIT 5 FOR INDOOR UNIT 3 UNIT 6 ...

Page 82: ...5 8 9 36 35 44 45 46 36 35 44 45 46 38 47 24 23 23 5 5 25 22 17 34 20 21 20 21 19 19 37 39 17 37 39 27 27 34 29 7 12 43 2 29 3 4 43 32 33 13 14 16 6 29 30 31 42 40 41 10 11 13 12 7 34 8 29 43 9 2 29 3 4 43 32 33 11 10 41 40 42 31 30 29 6 16 14 ...

Page 83: ... 98 ...

Page 84: ...HITACHI PM NO 0000 Printed in Malaysia RAM 130QH5 ...

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