Mitsubishi Electric PLA Series Service Manual Download Page 18 | Manualshive

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18

Thermistor TH2

Pipe temperature(Liquid)

Distributor

with strainer (#50)

Thermistor TH5

(Cond./ Eva.temperature)

Thermistor TH1

(Room temperature)

Refrigerant flow in cooling
Refrigerant flow in heating

Strainer (#50)

Strainer (#50)

Heat exchanger

Refrigerant GAS pipe connection

(Flare)

Refrigerant LIQUID pipe connection

(Flare)

PLA-ZRP35BA.UK PLA-ZRP50BA.UK PLA-ZRP60BA.UK
PLA-ZRP71BA.UK PLA-ZRP125BA.UK

PLA-ZRP140BA.UK

8

REFRIGERANT SYSTEM DIAGRAM

OCH535

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Summary of Contents for PLA Series

Page 1: ...ION CURVES 14 6 OUTLINES AND DIMENSIONS 16 7 WIRING DIAGRAM 17 8 REFRIGERANT SYSTEM DIAGRAM 18 9 TROUBLESHOOTING 19 10 SPECIAL FUNCTION 35 11 DISASSEMBLY PROCEDURE 45 Indoor unit Model names Service Ref INDOOR UNIT Model name indication PARTS CATALOG OCB535 No OCH535 November 2012 PLA ZRP35BA PLA ZRP50BA PLA ZRP60BA PLA ZRP71BA PLA ZRP125BA PLA ZRP140BA PLA ZRP35BA UK PLA ZRP50BA UK PLA ZRP60BA UK...

Page 2: ...2 1 REFERENCE MANUAL Service Ref Service Manual No OCH527 OCB527 PUHZ ZRP35 50VKA PUHZ ZRP60 71VHA PUHZ ZRP125 140VKA PUHZ ZRP125 140YKA OUTDOOR UNIT S SERVICE MANUAL OCH535 ...

Page 3: ...ation of refrigerant oil etc Use the following tools specifically designed for use with R410A refrigerant The following tools are necessary to use R410A refrigerant Handle tools with care If dirt dust or moisture enters into refrigerant cycle that can cause deterioration of refrigerant oil or malfunction of com pressor Do not use a charging cylinder If a charging cylinder is used the composition o...

Page 4: ... for R410A Use pressure performance of 5 09MPa G or over 3 Electronic scale 4 Gas leak detector Use the detector for R134a R407C or R410A 5 Adaptor for reverse flow check Attach on vacuum pump 6 Refrigerant charge base 7 Refrigerant cylinder Only for R410A Top of cylinder Pink Cylinder with syphon 8 Refrigerant recovery equipment 3 PART NAMES AND FUNCTIONS Drain pipe Filter Vane Gas pipe Liquid pi...

Page 5: ...Displays whether timer is on or off Buttons used to set the hour and minute of the current time and timer settings h and min buttons display display FAN SPEED display indicates which fan speed has been selected display The vertical direction of air flow is indicated display Blinks when model is selected display display CHECK and TEST RUN display indicate that the unit is being checked or test run ...

Page 6: ... error ON OFF lamp Main display Press to change the operation mode Main menu Press to move the cursor down Function button F1 Main display Press to decrease temperature Main menu Press to move the cursor up Function button F2 Main display Press to increase temperature Main menu Press to go to the previous page Function button F3 Main display Press to change the fan speed Main menu Press to go to t...

Page 7: ...ON OFF operation is centrally controlled Appears when the operation mode is centrally controlled Appears when the preset temperature is centrally controlled Appears when the filter reset function is centrally controlled Indicates when filter needs maintenance Current room temperature appears here Room temperature See the Installation Manual Appears when the buttons are locked Appears when the On O...

Page 8: ...ver Vent Lossnay High power Weekly timer Restriction Maintenance Initial setting On Off timer Auto Off timer Temp range Operation lock Manual vane angle Main Sub Timer Main display Contrast Display details Auto mode Administrator password Language selection Service Service menu Input maintenance info Function setting Lossnay City Multi only Check Self check Maintenance password Remote controller c...

Page 9: ...operate at the preset temperature after performing energy save operation for a specified time period Time can be set to a value from 30 and 120 in 10 minute increments This function will not be valid when the preset temperature ranges are restricted Schedule Set the start stop times to operate the units in the energy save mode for each day of the week and set the energy saving rate Up to four ener...

Page 10: ...ance Select Input maintenance Info from the Service menu to bring up the Maintenance information screen The following settings can be made from the Maintenance Information screen Model name input Serial No input Dealer information input Function setting Make the settings for the indoor unit functions via the remote controller as necessary LOSSNAY setting City Multi only This setting is required on...

Page 11: ...erature display range is 8 39 The display blinks if the temperature is less than 8 or 39 or more Louver display Indicates the action of the swing louver Does not appear if the louver is not running Power On indicator Indicates that the power is on Fan Speed indicator Shows the selected fan speed Ventilation indicator Appears when the unit is running in Ventilation mode Operation Section Temperatur...

Page 12: ... lbs Service Ref Mode Power supply phase cycle voltage Input Running current External finish Panel Heat exchanger Fan Fan drive No Fan motor output Airflow Low Medium2 Medium1 High External static pressure Booster heater Operation control Thermostat Noise level Low Medium2 Medium1 High Field drain pipe O D Dimensions Weight W D H INDOOR UNIT PLA ZRP35BA UK UNIT 840 33 1 16 PANEL 950 37 3 8 UNIT 84...

Page 13: ... H INDOOR UNIT PLA ZRP125BA UK Service Ref Mode Power supply phase cycle voltage Input Running current External finish Panel Heat exchanger Fan Fan drive No Fan motor output Airflow Low Medium2 Medium1 High External static pressure Booster heater Operation control Thermostat Noise level Low Medium2 Medium1 High Field drain pipe O D Dimensions Weight UNIT 840 33 1 16 PANEL 950 37 3 8 UNIT 840 33 1 ...

Page 14: ...XIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE NC 60 NC 50 NC 40 NC 30 NC 20 NC 70 BAND CENTER FREQUENCIES Hz PLA ZRP60BA UK PLA ZRP71BA UK NOTCH SPL dB LINE High 32 Medium1 31 Medium2 29 Low 28 NOTCH SPL dB LINE High 36 Medium1 34 Medium2 30 Low 28 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8000 APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE NC 60 NC 50 NC 40 NC 30 NC 20 NC...

Page 15: ...0 10 63 125 250 500 1000 2000 4000 8000 APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE NC 60 NC 50 NC 40 NC 30 NC 20 NC 70 OCTAVE BAND SOUND PRESSURE LEVEL dB 0 dB 0 0002 μbar BAND CENTER FREQUENCIES Hz 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8000 APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE NC 60 NC 50 NC 40 NC 30 NC 20 NC 70 BAND CENTER FREQUENCIES Hz UNIT 1 5m M...

Page 16: ...on 1 2 inch Refrigerant pipe 15 88 Flared connection 5 8 inch Refrigerant pipe 6 35 9 52 Flared connection 1 4 inch 3 8 inch compatible PLA ZRP35 50BA PLA ZRP60BA PLA ZRP71 125 140BA Detail drawing of fresh air intake hole Detail connecting of branch duct Both aspects 3 2 8 14 2 8 150 100 Emergency operation switch Heating and Emergency Up Down switch Down In case of auto grille PLP 6BAJ Suspensio...

Page 17: ...using the remote controller For the setting method please refer to the indoor unit Installation Manual W B RU BZ LED1 LED2 SW1 SW2 OPTION PART PCB FOR WIRELESS REMOTE CONTROLLER RECEIVING UNIT BUZZER LED OPERATION INDICATION GREEN LED PREPARATION FOR HEATING ORANGE EMERGENCY OPERATION HEAT DOWN EMERGENCY OPERATION COOL UP Be sure to turn off the source power and then disconnect fan motor connector...

Page 18: ...H1 Room temperature Refrigerant flow in cooling Refrigerant flow in heating Strainer 50 Strainer 50 Heat exchanger Refrigerant GAS pipe connection Flare Refrigerant LIQUID pipe connection Flare PLA ZRP35BA UK PLA ZRP50BA UK PLA ZRP60BA UK PLA ZRP71BA UK PLA ZRP125BA UK PLA ZRP140BA UK 8 REFRIGERANT SYSTEM DIAGRAM OCH535 ...

Page 19: ...bleshooting of problems The trouble is not reoccurring Logged Not logged Consider the temporary defects such as the work of protection devices in the refrigerant circuit including compressor poor connection of wiring noise and etc Re check the symptom and check the installation environment refrigerant amount weather when the trouble occurred matters related to wiring and etc Reset error code logs ...

Page 20: ...is cancelled Procedure 1 Press the CHECK button twice 2 Press the temperature buttons 3 Point the remote controller at the sensor on the indoor unit and press the HOUR button 4 Point the remote controller at the sensor on the indoor unit and press the ON OFF button Malfunction diagnosis method at maintenance service 9 2 MALFUNCTION DIAGNOSIS METHOD BY REMOTE CONTROLLER In case of trouble during op...

Page 21: ...ber of times Wireless remote controller Wired remote controller 1 P1 Intake sensor error P9 Pipe TH5 sensor error 2 P2 Pipe TH2 sensor error 3 E6 E7 Indoor outdoor unit communication error 4 P4 Drain sensor error Float switch connector CN4F open 5 P5 PA Drain pump error Forced compressor stop due to water leakage abnormality 6 P6 Freezing Overheating protection operation 7 EE Communication error b...

Page 22: ...on device is not connected Reverse or open phase wiring for the outdoor unit s power terminal block L1 L2 L3 Incorrect wiring between indoor and outdoor units incorrect polarity of S1 S2 S3 Remote controller wire short Note Operation is not possible for about 30 seconds after cancellation of function selection Correct operation For description of each LED LED1 2 3 provided on the indoor controller...

Page 23: ...efer to P1 above 2 Check contact failure of connector CN44 on the indoor controller board Refer to 9 7 Turn the power on and check restart after inserting connector again 4 Check pipe liquid temperature with remote controller in test run mode If pipe liquid temperature is extremely low in cooling mode or high in heating mode refrigerant circuit may have defective 5 Check pipe liquid temperature wi...

Page 24: ...range 4 Defective indoor fan motor Fan motor is defective Indoor controller board is defec tive 5 Defective outdoor fan control 6 Overcharge of refrigerant 7 Defective refrigerant circuit clogs 8 Bypass circuit of outdoor unit is defective Cooling or drying mode 1 Check clogs of the filter 2 Remove blockage 4 Refer to 9 6 5 Check outdoor fan motor 67 Check operating condition of refrigerant circui...

Page 25: ...necting remote control ler max 2 units When it is not the above mentioned problem of 1 3 4 Diagnose remote controllers a When RC OK is displayed Remote controllers have no problem Turn the power off and on again to check If abnormality generates again replace indoor controller board b When RC NG is displayed Replace remote controller c When RC E3 or ERC 00 66 is dis played noise may be causing abn...

Page 26: ... board to transmit signals Indoor controller board Abnormal if data cannot be read normally from the nonvolatile memory of the indoor controller board 1 Defective indoor controller board 1 Replace indoor controller board Remote controller control board 1 Abnormal if data cannot be read nor mally from the nonvolatile memory of the remote controller control board Error code E1 2 Abnormal if the cloc...

Page 27: ...on of 4 way valve 2 Disconnection of or leakage in refrigerant pipes 3 Air into refrigerant piping 4 Abnormal operation no rotation of indoor fan Defective fan motor Defective indoor control board 5 Defective refrigerant circuit clogging 1 When this error occurs be sure to replace the 4 way valve 2 Check refrigerant pipes for disconnection or leakage 3 After the recovery of refrigerant vacuum dry ...

Page 28: ...k S1 and S2 When AC 220 240V is not detected check indoor outdoor unit connecting wire for miswiring When AC 220 240V is detected check 4 below 4 Check the fuse on indoor controller board Check the wiring connection If no problem are found indoor controller board is defective 1 Check the voltage of indoor power supply terminal block L N When AC220 240V is not detected check the power supply wiring...

Page 29: ...ontroller Check indoor outdoor unit connecting wire for connection failure 1 Check the connection of remote controller wires in case of twin triple indoor unit system When 2 or more indoor units are wired in one refrigerant system connect remote controller wires to one of those units 2 Check the setting of refrigerant address in case of grouping control system If there are some units whose refrige...

Page 30: ...unction it is possible to activate Emergency Operation by using the indoor unit Emergency operation switch SW1 SW2 of the wireless signal receiver board However if the indoor unit microprocessor has failed it is nesessary to proceed with points 2 and 3 below as in the case of the wired remote control 2 When you activate Emergency operation of the cooling or heating you have to set the switch SWE o...

Page 31: ...ure of 20 30 Vane motor MV Vane motor for i see sensor Option Abnormal Open or short Red Yellow Red Blue Red Orange Red White Connector Normal 300 Measure the resistance between the terminals with a tester At the ambient temperature of 20 30 Abnormal Open or short Red Yellow Red Blue Red Orange Red White Connector Normal 250 MV MV Normal Do not disassemble corner panel with i see sensor Black plas...

Page 32: ...f the indoor controller circuit board and fan motor Self check Symptom The indoor fan cannot turn around Wiring contact check Contact of fan motor connector CNMF No No NG Power supply check Remove the connector CNMF Measure the voltage in the indoor controller circuit board TEST POINT VDC between 1 and 4 of the fan connector VDC DC 310 340 V TEST POINT VCC between 5 and 4 of the fan connector VCC ...

Page 33: ...on Jumper wire J41 J42 Pair No setting for wireless remote controller VCC Voltage between pins of C955 15VDC Same as 5 4 of CNMF CN32 Connector Remote switch CN51 Centrally control 1 2 Control signal 13V pulse input 1 3 4 Operation indicator 13VDC 3 3 5 Malfunction indicator 13VDC 3 CN90 Connect to the wireless remote controller board CNB CN20 Room temperature thermistor TH1 LED2 Power supply R B ...

Page 34: ...ntrol PCB J41 J42 are given in the table on the left in the table indicates the jumper wire is dis connected There is no jumper JP1 because these models have the cond eva temperature thermistor TH5 Jumper wire Short Open Without TH5 With TH5 Model JP1 For product Service parts Indoor controller board type JP3 The black square indicates a switch position MODELS SETTING PLA ZRP35BA ON OFF 1 2 3 4 5 ...

Page 35: ...r Electric Box of the decorative panel You can set up 8 different stages of lowering distance for the air intake grille according to the set up location if desired As a factory default the decorative panel will automatically stop at 1 6 m from the ceiling level The distance is a rough indication check by actually lowering it 1 Take the cover off the electric box of the decorative panel 2 screws 2 ...

Page 36: ... cause an injury or a failure Warning F1 F2 F3 F4 F1 F2 F3 F4 All Auto descending panel Auto descending panel Input display All Cur Address Check Down Up Cur Address Check Down Up Ref address Unit No Operation Keep clear panel descending Press Check for Unit No Ref address Unit No Operation Panel will stop in 30 sec Keep clear panel descending F1 F2 F3 F4 Maintenance menu Main menu Cursor Auto des...

Page 37: ... and 4 0 m These should be used only as a guide You should lower the air intake grille yourself to check the exact distance You cannot stop the operation while the air intake grille is rising If you press the button while the intake grille is moving up the air intake grille may stop rising but it will not stop immediately Stand by for raising display Raising display blinking Stopped display when t...

Page 38: ...ant address No can be changed by using the TEMP buttons when the panel displays a or b Every time you press the Mode selection button the target of operation will change as illustrated below 6 Continue to press the Mode selection button until Waiting for up down operation is displayed The following steps are the same as steps 3 6 described in the General Operation section Refer to that section In ...

Page 39: ... intake grille has been raised the set distance but the storage detection switch is not engaged In this case the operation below will be repeated up to 4 times 10 cm down 30 cm up 10 cm down 30 cm up No load detection Case UP DOWN commands with no grille suspended When both wire 1b and wire 2b are not loaded the wires will not move Obstacle detection Case Making contact with something while loweri...

Page 40: ...switch heating down UK1 Up down machine SW2 Emergency switch cooling up MU1 Motor Up down LS1 Limit switch storage detection LS21 Limit switch tension detection R B Wired remote controller I B Indoor controller board SW22 10 3 2 Dip SW 2 type SW2 SYMBOL NAME SYMBOL NAME U B CONTROLLER BOARD UK1 I B W B UP DOWN MACHINE FUSE FUSE T3 15AL250V M MOTOR FOR GRILLE UP DOWN LS21 LIMIT SWITCH TENSION DETEC...

Page 41: ...e grille Lower the air intake grille again and check whether the filter is installed in the correct position Lower the air intake grille again and hook on the air intake grille This is normal This is normal Power failure Batteries are not inserted into the wireless remote controller Or battery power is running low There is something on the air intake grille Or something is stuck in the air intake ...

Page 42: ...n with the 1st unit Once the actual room temperature goes down to 4 degrees C below set point the 2nd unit stops operation automatically set point set temperature by R C remote controller 4 6 8 C selectable Number of operating units is determined according to the room temperature and set point When room temperature becomes higher than set point standby unit starts 2 units operation When room tempe...

Page 43: ...tial setting 2nd unit cut in setting Setting contents Setting No Request code No 7 316 No 8 317 No 9 318 Rotation and Back up OFF Normal group control operation Monitoring the request code of current setting Setting No Request code No 1 310 No 2 311 No 3 312 No 4 313 No 5 314 No 6 315 Cut in function OFF Monitoring the request code of current setting Setting contents Rotation ON Alternating interv...

Page 44: ...4 button 8 Press the F3 or F4 button to set the Refrigerant address 0 9 Press the F3 or F4 button to set the desired request code No Rotation Back up operation Please match request code with 311 318 either 2nd stage cut in operation Please match request code with 321 324 either 0 Press the button Data will be collected and displayed 1 Press the F3 or F4 button to set the Refrigerant address 1 Plea...

Page 45: ...emove 2 reactor fixing screws and remove the reactor 4 Removing the indoor controller board I B 1 Remove the air intake grille and the filter See Figure 1 2 Remove the 2 screws from the electrical box cover 3 Disconnect the connectors CNMF White 7P for fan motor CN44 White 4P for thermistor TH2 TH5 CNP Blue 3P for drain pump CN4F White 4P for float switch CN01 Black 5P for earth and reactor CNV Wh...

Page 46: ...he bell mouth 3 screws See Photo 2 3 Remove the turbo fan nut 4 Pull out the turbo fan 5 Remove the wire cover 3 screws 6 Remove 2 wiring clamps 7 Disconnect the connector of the fan motor CNMF 8 Remove the 3 nuts and washers and rubber mounts of the fan motor 8 Removing the drain pan 1 Remove the air intake grille and the filter See Figure 1 2 Remove the 2 screws from the electrical box cover 3 D...

Page 47: ...rain pump Hose band Float switch Drain pump assembly fixing screw Drain pump fixing screw Float switch fixing screw 11 Removing the heat exchanger 1 Remove the drain pan See Photo 6 2 Remove the 3 screws of the piping cover and pull out piping cover 3 Remove the 2 screws of coil plate 4 Remove the 2 screws of the coil 5 Remove the screw of the coil support 6 Pull out the heat exchanger Photo 10 Co...

Page 48: ... MARUNOUCHI CHIYODA KU TOKYO 100 8310 JAPAN CCopyright 2012 MITSUBISHI ELECTRIC CORPORATION Distributed in Nov 2012 No OCH535 Made in Japan New publication effective Nov 2012 Specifications are subject to change without notice TM ...

Page 49: ...Installation Manual PLA ZRP35 140 Service Manual OCH535 PLA ZRP35 140 Parts Catalog OCB535 PLA ZRP35 140 Instruction Book PLA ZRP35 140 Installation Manual BH79D045K05 PLA ZRP35 100 Declaration of Conformity PLA ZRP PLA RP Installation Manual RG79D506K04 ...

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