Mitsubishi Electric MR. SLIM PCA Series Service Manual Download Page 46

Page: 46 / 52

OCH659A

DISASSEMBLY PROCEDURE

1. Removing the air intake grille

(1) Slide the air intake grille holding knobs (at 2 or 3 loca-

tions) to the rear to open the air intake grille. (See Figure 1)

(2) While the air intake grille left open, push the stoppers

on the rear hinges (at 2 or 3 locations) to pull out the air

intake grille. (See Figure 2)

2. Removing the indoor controller board and the electrical box

(1) Remove the air intake grille. (See Figure 1, 2)

(2) Remove the beam by removing screws. (See Photo 1)

(3) Remove 2 screws from the electrical cover, and remove

the electrical cover.

(4) Remove 2 screws from the electrical box and pull the

electrical box downward.

Temporarily secure the electrical box using 2 hooks in

the back of electrical box.

(5) Disconnect the connectors on the indoor controller

board.

[Removing the electrical box]

(6) Disconnect the wires from the terminal blocks and pull

out the electrical box. (See Photo 2)

[Removing the indoor controller board]

(6) Remove the 6 supports from the indoor controller board

and remove the indoor controller board. (See Photo 3)

Figure 1

Photo 1

Photo 2

slide

Air intake grille

holding knobs

hinges

Pull out the air intake grille

Figure 2

Beam

fixing screw

(4 × 8 PT)

Electrical cover

fixing screws

Beam fixing screws

Electrical cover

Photo 3

Electrical box

fixing screws

Electrical box

Room temperature

thermistor (TH1)

Indoor controller

board (I.B.)

Terminal blocks

(TB4),(TB5)

Be careful when removing heavy parts.

(Photo:

PCA-M125KA

)

Reactor (DCL)

OPERATING PROCEDURE

PHOTOS & FIGURES

PCA-M35KA PCA-M50KA PCA-M60KA PCA-M71KA

PCA-M35KA-ER PCA-M50KA-ER PCA-M60KA-ER PCA-M71KA-ER

PCA-M100KA PCA-M125KA PCA-M140KA

PCA-M100KA-ER PCA-M125KA-ER PCA-M140KA-ER

: Indicates the visible parts in the photos/figures.

Summary of Contents for MR. SLIM PCA Series

Page 1: ...35KA ER PCA M50KA PCA M50KA ER PCA M60KA PCA M60KA ER PCA M71KA PCA M71KA ER PCA M100KA PCA M100KA ER PCA M125KA PCA M125KA ER PCA M140KA PCA M140KA ER Indoor unit Model Name PCA M35KA PCA M35KA ER PCA M50KA PCA M50KA ER PCA M60KA PCA M60KA ER PCA M71KA PCA M71KA ER PCA M100KA PCA M100KA ER PCA M125KA PCA M125KA ER PCA M140KA PCA M140KA ER SPLIT TYPE HEAT PUMP AIR CONDITIONERS SPLIT TYPE AIR CONDI...

Page 2: ... ZM35 50VKA PUZ ZM60 71VHA PUZ ZM35 50VKA ET PUZ ZM60 71VHA ET OCH653 OCB653 PUZ ZM100VKA PUZ ZM125 140VKA PUZ ZM100YKA PUZ ZM125 140YKA PUZ ZM100VKA UK PUZ ZM125 140VKAR1 UK PUZ ZM100YKA UK PUZ ZM125 140YKAR1 UK OCH654 OCB654 PUHZ ZRP35 50VKA2 PUHZ ZRP60 71VHA2 PUHZ ZRP35 50VKA2 ER ET PUHZ ZRP60 71VHA2 ER ET OCH635 OCB635 PUHZ ZRP100VKA3 PUHZ ZRP125 140VKA3 PUHZ ZRP100YKA3 PUHZ ZRP125 140YKA3 PUH...

Page 3: ...frigerant 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 of refrigera nt will change and the efficiency will be lowered Flare tool Electronic refrigerant charging scale Vacuum pump adaptor Size adjustment gauge Gauge manifold Torque wrench Gas leak detector Charge hose Tools for R32 R...

Page 4: ...t pipes 12 When performing brazing work be sure to ventilate the room sufficiently Make sure that there are no hazardous or flammable materials nearby When performing the work in a closed room small room or similar location make sure that there are no refriger ant leaks before performing the work If refrigerant leaks and accumulates it may ignite or poisonous gases may be released 13 Do not instal...

Page 5: ...he Refrigeration Equipment Where electrical components are being changed they shall be fit for the purpose and to the correct specification At all times the manufacturer s maintenance and service guidelines shall be followed If in doubt consult the manufacturer s technical department for assistance The following checks shall be applied to installations using flammable refrigerants The charge size ...

Page 6: ...hall be used However for flammable refrigerants it is important that best practice is followed since flammability is a considera tion The following procedure shall be adhered to remove refrigerant purge the circuit with inert gas evacuate purge again with inert gas open the circuit by cutting or brazing The refrigerant charge shall be recovered into the correct recovery cylinders For appliances co...

Page 7: ...to cylinders ensure that only appropriate refrig erant recovery cylinders are employed Ensure that the correct number of cylinders for holding the total system charge are available All cylinders to be used are designated for the recovered refrigerant and labelled for that refrigerant i e special cylinders for the recovery of refrigerant Cylinders shall be complete with pressure relief valve and as...

Page 8: ...ions 1 Gauge manifold Use the existing fitting specifications UNF1 2 Use high tension side pressure of 5 3MPa G or over 2 Charge hose Use pressure performance of 5 09MPa G or over 3 Electronic weighing scale 4 Gas leak detector Use the detector for R32 or R410A 5 Adaptor for reverse flow check Attach on vacuum pump 6 Refrigerant charge base 7 Refrigerant cylinder Top of cylinder R32 or R410A refri...

Page 9: ...isplay 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 airflow is indicated display Blinks when model is selected display display CHECK and TEST RUN display indicate that the unit is being checked or tes...

Page 10: ...ll icons are displayed for explanation 5 6 1 2 3 4 Press to turn ON OFF the indoor unit 1 ON OFF button This lamp lights up in green while the unit is in operation It blinks while the remote controller is starting up or when there is an error Press to save the setting Main display Press to change the operation mode Main menu Press to move the cursor down Press to return to the previous screen Main...

Page 11: ... 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 Input maintenance info Function setting Check Self check Maintenance password Remote controller check Test run Clock Auto descending panel Menu structure Filter ...

Page 12: ...k selected functions The locked functions cannot be operated Maintenance Auto descending panel Use to lift and lower the auto descending panel Optional parts Manual vane angle Use to set the vane angle for each vane to a fixed position 3D i see Sensor Use to set the following functions for 3D i see Sensor Air distribution Energy saving option Seasonal airflow Initial setting Main Sub When connecti...

Page 13: ...0 4 Heat exchanger Plate fin coil Fan Fan drive No Sirocco fan direct 2 Fan motor output kW 0 090 Airflow Low Medium2 Medium1 High m3 min CFM 10 11 13 15 350 390 460 530 External static pressure Pa mmAq 0 direct blow Operation control Thermostat Remote controller built in Noise level Low Medium2 Medium1 High dB 32 34 37 40 Field drain pipe O D mm inch 26 1 Dimensions W mm inch 960 37 13 16 D mm in...

Page 14: ...late fin coil Fan Fan drive No Sirocco fan direct 2 Fan motor output kW 0 160 Airflow Low Medium2 Medium1 High m3 min CFM 22 24 26 28 775 850 920 990 External static pressure Pa mmAq 0 direct blow Operation control Thermostat Remote controller built in Noise level Low Medium2 Medium1 High dB 37 39 41 43 Field drain pipe O D mm inch 26 1 Dimensions W mm inch 1600 63 D mm inch 680 26 3 4 H mm inch 2...

Page 15: ...ate fin coil Fan Fan drive No Sirocco fan direct 2 Fan motor output kW 0 160 Airflow Low Medium2 Medium1 High m3 min CFM 24 26 29 32 850 920 1025 1130 External static pressure Pa mmAq 0 direct blow Operation control Thermostat Remote controller built in Noise level Low Medium2 Medium1 High dB 41 43 45 48 Field drain pipe O D mm inch 26 1 Dimensions W mm inch 1600 63 D mm inch 680 26 3 4 H mm inch ...

Page 16: ...AIR INTAKE AMOUNT STATIC PRESSURE CHARACTERISTICS Q 0 B A C 1 Curve in the graphs Duct characteristics at site Q A E C 2 Q Qa A D 3 Q Designed amount of fresh air intake m3 min A Static pressure loss of fresh air intake duct system with airflow amount Q Pa B Forced static pressure at air conditioner inlet with airflow amount Q Pa C Static pressure of booster fan with airflow amount Q Pa D Static p...

Page 17: ...NC 30 NC 20 NC 70 OCTAVE BAND SOUND PRESSURE LEVEL dB 0 dB 0 0002 μbar BAND CENTER FREQUENCIES Hz PCA M60KA PCA M60KA ER 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 OCTAVE BAND SOUND PRESSURE LEVEL dB 0 dB 0 0002 µbar PCA M71KA PCA M71KA ER NOTCH High Medium1 Mediu...

Page 18: ... 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 OCTAVE BAND SOUND PRESSURE LEVEL dB 0 dB 0 0002 µbar PCA M140KA PCA M140KA ER NOTCH High Medium1 Medium2 Low SPL dB 48 45 43 41 LINE 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8000 APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOIS...

Page 19: ...arrangement Knockout hole for left drain piping arrangement Refrigerant pipe connection gas pipe side flared connection Refrigerant pipe connection liquid pipe side flared connection 1 In case of the rear pipe arrangement make sure to remove the shaded portions from the independent piece Then put the independent piece back in initial position The heat exchanger might be clogged because of dust 5 1...

Page 20: ...ard Air outlet 233 Electrical box When electrical box is pulled down Electrical box 9 7 In case of the rear pipe arrangement make sure to remove the shaded portions from the independent piece Then put the independent piece back in initial position The heat exchanger might be clogged because of dust 5 10 51 246 A B 236 150 62 140 18 1237 Suspension bolt pitch 320 680 80 84 88 195 230 57 254 476 680...

Page 21: ...onnection 5 1 2 3 4 Ceiling FRONT VIEW Electrical box When electrical box is pulled down 2 NOTES 1 Use M10 or W3 8 screw for anchor bolt 2 Please be sure when installing the drain pump optional parts refrigerant pipe will be only upward In case of the rear pipe arrangement make sure to remove the shaded portions from the independent piece Then put the independent piece back in initial position The...

Page 22: ...22 OCH659A WIRED REMOTE CONTROLLER Unit mm 19 120 120 46 83 5 Option ...

Page 23: ...23 OCH659A 23 WIRING DIAGRAM 7 PCA M35KA PCA M50KA PCA M60KA PCA M71KA PCA M35KA ER PCA M50KA ER PCA M60KA ER PCA M71KA ER PCA M100KA PCA M125KA PCA M140KA PCA M100KA ER PCA M125KA ER PCA M140KA ER ...

Page 24: ...efrigerant flow in cooling Refrigerant flow in heating Strainer 50 Strainer 50 Heat exchanger Refrigerant GAS pipe connection Flare Refrigerant LIQUID pipe connection Flare REFRIGERANT SYSTEM DIAGRAM 8 PCA M35KA PCA M50KA PCA M60KA PCA M71KA PCA M35KA ER PCA M50KA ER PCA M60KA ER PCA M71KA ER PCA M100KA PCA M125KA PCA M140KA PCA M100KA ER PCA M125KA ER PCA M140KA ER ...

Page 25: ...scertain the cause of the trouble according to 9 4 TROUBLESHOOTING OF PROBLEMS The trouble is not reoccurring Logged 1Consider the temporary defects such as the work of protection devices in the refrigerant circuit including compressor poor connection of wiring noise etc Re check the symptom and check the installation environment refrigerant amount weather when the trouble occurred matters related...

Page 26: ...ntermittent buzzer sound the operation light blinks and the check code is output It takes 3 seconds at most for check code to appear 4 Point the remote controller at the sensor on the indoor unit and press the ON OFF button The check mode is cancelled Malfunction diagnosis method at maintenance service 9 2 MALFUNCTION DIAGNOSIS METHOD BY REMOTE CONTROLLER In case of trouble during operation When a...

Page 27: ...nsor error 12 13 14 Others Other errors Refer to the technical manual for the outdoor unit Output pattern A Errors detected by indoor unit Wireless remote controller Wired remote controller Symptom Remarks Beeper sounds OPERATION INDICATOR lamp blinks Number of times Checkcode 1 P1 Intake sensor error 2 P2 Pipe TH2 sensor error P9 Pipe TH5 sensor error 3 E6 E7 Indoor outdoor unit communication err...

Page 28: ...e LED 2 blinks once Incorrect wiring between indoor and outdoor units incorrect polarity of S1 S2 S3 Remote controller wire short On the wireless remote controller with condition above following phenomena take place No signals from the remote controller can be received Operation lamp is blinking The buzzer makes a short ping sound Note Operation is not possible for about 30 seconds after cancellat...

Page 29: ...ndoor controller board Check resistance value of thermistor For characteristics refer to P1 above Check contact failure of connector CN44 on the indoor controller board Refer to 9 7 TEST POINT DIAGRAM Turn the power on and check restart after inserting connector again Check pipe liquid temperature with remote controller in test run mode If pipe liquid temperature is extremely low in cooling mode o...

Page 30: ...ctive indoor fan motor Fan motor is defective Indoor controller board is defec tive Defective outdoor fan control Overcharge of refrigerant Defective refrigerant circuit clogs Bypass circuit of outdoor unit is defective Cooling or drying mode Check clogs of the filter Remove blockage Refer to 9 6 HOW TO CHECK THE PARTS Check outdoor fan motor Check operating condition of refrigerant circuit Heatin...

Page 31: ...m 16 units The number of connecting remote control ler maximum 2 units If the cause of trouble is not any of above 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 displayed n...

Page 32: ... signals Indoor controller board Abnormal if data cannot be read normally from the nonvolatile memory of the indoor controller board Defective indoor controller board Replace indoor controller board The check code in the parenthesis indicates PAR 33MAA model Remote controller control board Abnormal if data cannot be read nor mally from the nonvolatile memory of the remote controller control board ...

Page 33: ... operation no rotation of indoor fan Defective fan motor Defective indoor control board Defective refrigerant circuit clogging When this error occurs be sure to replace the 4 way valve Check refrigerant pipes for disconnection or leakage After the recovery of refrigerant vacuum dry the whole refrigerant circuit Refer to section 9 6 2 DC Fan motor fan motor indoor controller circuit board Check ref...

Page 34: ...inal block S1 and S2 When 220 240 V AC is not detected check indoor outdoor unit connecting wire for miswiring When 220 240 V AC is detected check below Check the fuse on indoor controller board Check the wiring connection If no problem is found indoor controller board is defective Check the voltage of indoor power supply terminal block L N When 220 240 V AC is not detected check the power supply ...

Page 35: ...re Check the connection of remote controller wires in the 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 Check the setting of refrigerant address in case of grouping control system If there are some units whose refrigerant addresses are 0 in one group set one of the units to 0 using SW1 3 ...

Page 36: ...ion 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 necessary to proceed with points 2 and 3 below as in the case of the wired remote controller 2 When you activate emergency operation of the cooling or heating you have to set the switch SWE on...

Page 37: ...PCA M100KA ER PCA M125KA ER PCA M140KA ER Parts name Check points Room temperature thermistor TH1 Pipe temperature thermistor liquid TH2 Condenser evaporator temperature thermistor TH5 Disconnect the connector then measure the resistance with a tester Refer to 9 6 1 Thermistor Vane motor MV Measure the resistance between the terminals with a tester At the ambient temperature of 20 to 30 C Connecto...

Page 38: ...ing of SWE Set SWE to OFF if it is set to ON Is there contact failure Is the voltage normal Does the voltage repeat 0 V DC and 15 V DC Indoor controller board fuse check Wiring contact check Contact of fan motor connector CNMF Power supply check Remove the connector CNMF Measure the voltage in the indoor controller circuit board TEST POINT 1 VDC between 1 and 4 of the fan connector VDC 310 340 V D...

Page 39: ...e output SWE Emergency operation Jumper wire J41 J42 Pair No setting for wireless remote controller FUSE 6 3 A 250 V CNMF Fan motor 1 4 310 340 V DC 5 4 15 V DC 6 4 0 6 5 V DC 7 4 Stop 0 or 15 V DC Operation 7 5 V DC 0 15 V pulse VSP Voltage between pins of C626 0 V DC FAN stop 1 6 5 V DC FAN operation Same as 6 4 of CNMF VFG Voltage between PC672 and C955 Same as 7 4 of CNMF VCC Voltage between p...

Page 40: ... in the table indicates the jumper line is disco nnected Jumper wire Short Open For product Service parts Indoor controller board type JP3 Service board MODEL PCA M50KA PCA M35KA 1 2 3 4 5 ON OFF 1 2 3 4 5 ON OFF PCA M60KA 1 2 3 4 5 ON OFF PCA M71KA 1 2 3 4 5 ON OFF PCA M100KA 1 2 3 4 5 ON OFF PCA M125KA 1 2 3 4 5 ON OFF PCA M140KA 1 2 3 4 5 ON OFF The black square indicates a switch position Serv...

Page 41: ...ons available when setting the unit number to 01 03 or AL 07 in case of wireless remote controller Function Settings Mode No Setting No Initial setting Setting Filter sign 100 Hr 07 1 2500 Hr 2 No filter sign indicator 3 Fan speed Silent low ceiling 08 1 Standard 2 High ceiling 3 Installed options high efficiency filter Not supported 10 1 Supported 2 Up down vane setting No vanes 11 1 Equipped wit...

Page 42: ...and Back up function Outline of functions Main and sub unit operate alternately according to the interval of rotation setting Main and sub unit should be set by refrigerant address Outdoor DIP switch setting Refrigerant address 00 Main unit Refrigerant address 01 Sub unit When an error occurs to one unit another unit will start operation Back up function System constraint This function is availabl...

Page 43: ...function OFF Monitoring the request code of current setting Setting contents Rotation ON Alternating interval 28days and back up function Rotation ON Alternating interval 14days and back up function Rotation ON Alternating interval 1day and back up function Back up function only No 5 324 Rotation ON Alternating interval 7days and back up function Rotation ON Alternating interval 5days and back up ...

Page 44: ...2 button and press the button Set the Refrigerant address and Request code Select the item to be changed with the F1 or F2 button Select the required setting with the F3 or F4 button Select the required code No 311 318 321 324 with the F3 or F4 button Ref address setting 0 15 Request code setting Press the button Data will be collected and displayed Request code 311 Rotation and Back up OFF 0311 S...

Page 45: ...want to change with the F1 or F2 button Set each number 0 through 9 with the F3 or F4 button Note The initial maintenance password is 9999 Then press the button Select Check with the F1 or F2 button and press the button Select Request code with the F1 or F2 button and press the button Set the Refrigerant address and Request code Select the item to be changed with the F1 or F2 button Select the req...

Page 46: ...door controller board Removing the electrical box 6 Disconnect the wires from the terminal blocks and pull out the electrical box See Photo 2 Removing the indoor controller board 6 Remove the 6 supports from the indoor controller board and remove the indoor controller board See Photo 3 Figure 1 Photo 1 Photo 2 slide Air intake grille Air intake grille holding knobs hinges Pull out the air intake g...

Page 47: ...cal cover and remove the electrical cover 4 Remove 2 screws from the electrical box and pull the electrical box downward 5 Temporarily secure the electrical box using 2 hooks in the back of electrical box 6 Remove 4 screws fixing fan guard of the fan motor 2 screws See Photo 5 2 screws Upper the electrical box 7 Remove 2 screws fixing fan guard of piping side and remove the fan guard See Photo 6 8...

Page 48: ... Remove 4 screws from the fan guard of the fan motor See Photo 5 6 Remove 2 screws from the left side beam and remove the beam See Photo 1 7 Remove the 3 screws from center fan guard and remove the fan guard 2 screws See Photo 9 1 screw Drain pan side 8 Remove 2 screws from the left fan guard and remove the fan guard See Photo 10 9 Loosen 2 set screws 2 hexagon set screws of connect ing joint See ...

Page 49: ... the right side panel See Figure 3 4 3 Remove the connector of vane motor 4 Remove 2 screws of vane motor cover then remove vane motor Photo 13 Screws Connector Vane motor and cover Photo 14 Under panel fixing screws 9 Removing the drain pan 1 Remove the air intake grille See Figure 1 2 2 Remove the side panel right and left See Figure 3 4 3 Remove the under panel See Photo 14 Remove the screws of...

Page 50: ...oving the pipe temperature thermistors liquid TH2 and condenser evaporator temperature thermistor TH5 1 Remove the air intake grille See Figure 1 2 2 Remove the left and right side panels See Figure 3 4 3 Remove the under panel See Photo 14 4 Remove the drain pan See Photo 15 16 17 5 Disconnect the connector CN44 white from the indoor controller board 6 Remove 6 screws from the pipe cover and remo...

Page 51: ...de panels See Figure 3 6 Remove the under panel See Photo 14 7 Remove the drain pan See Photo 15 16 17 8 Remove the pipe cover See Photo 18 9 Remove the pipe thermistors TH2 and TH5 from each holder See Photo 19 10 Remove the pipe band fixing screw and remove the pipe band See Photo 22 11 Remove 2 screws from the heat exchanger and remove the heat exchanger Photo 22 Pipe band fixing screw Pipe ban...

Page 52: ...TRIC CORPORATION Issued Nov 2018 No OCH659 REVISED EDITION A Published Mar 2017 No OCH659 Made in Japan HEAD OFFICE TOKYO BUILDING 2 7 3 MARUNOUCHI CHIYODA KU TOKYO 100 8310 JAPAN Specifications are subject to change without notice ...

Search results

Summary of Contents for MR. SLIM PCA Series

Reviews:

Related manuals for MR. SLIM PCA Series

Brands by name

Popular brands

Mitsubishi Electric MR. SLIM PCA Series, Service Manual

Search results

Summary of Contents for MR. SLIM PCA Series

Reviews:

Related manuals for MR. SLIM PCA Series

Brands by name

Popular brands