Mitsubishi Electric Mr.Slim PMH-P25BA Service Manual Download

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SERVICE MANUAL

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

No. OC333

INDOOR UNIT

REMOTE CONTROLLER

CONTENTS

1. REFERENCE MANUAL ······································2

2. SAFETY PRECAUTION···································2

3. PART NAMES AND FUNCTIONS ···················4

4. SPECIFICATIONS ············································6

5. NOISE CRITERION CURVES ··························7

6. OUTLINES AND DIMENSIONS ·······················8

7. WIRING DIAGRAM··············································9

8. REFRIGERANT SYSTEM DIAGRAM ··················10

9. TROUBLESHOOTING ···································11

10. DISASSEMBLY PROCEDURE ······················22

11. PARTS LIST ···················································25

ON/OFF

TEMP.

July 2005

NOTE:
• This manual describes only

service data of the indoor
units.

Indoor unit
[Model names]

[Service Ref.]

PMH-P25BA

PMH-P35BA

PMH-P50BA

OC333--1.qxp 05.7.11 5:18 PM Page 1

Summary of Contents for Mr.Slim PMH-P25BA

Page 1: ... 4 SPECIFICATIONS 6 5 NOISE CRITERION CURVES 7 6 OUTLINES AND DIMENSIONS 8 7 WIRING DIAGRAM 9 8 REFRIGERANT SYSTEM DIAGRAM 10 9 TROUBLESHOOTING 11 10 DISASSEMBLY PROCEDURE 22 11 PARTS LIST 25 ON OFF TEMP July 2005 NOTE This manual describes only service data of the indoor units Indoor unit Model names Service Ref PMH P25BA PMH P25BA PMH P35BA PMH P35BA PMH P50BA PMH P50BA ...

Page 2: ...e amount of mineral oil enter that can cause deterioration of refrigerant oil etc Use liquid refrigerant to charge the system If gas refrigerant is used to seal the system the composition of the refrigerant in the cylinder will change and performance may drop Do not use a refrigerant other than R407C If another refrigerant R22 etc is used the chlorine in the refrigerant may cause the lubricant det...

Page 3: ...proceed to working Do not release refrigerant in the air After completing the repair service recharge the cycle with the specified amount of liquid refrigerant Gravimeter Unit 3 Service tools Use the below service tools as exclusive tools for R407C refrigerant No Tool name Specifications 1 Gauge manifold Only for R407C Use the existing fitting SPECIFICATIONS UNF7 16 Use high tension side pressure ...

Page 4: ...ad Timer On Off button Set Day button Opening the door ON OFF button Fan Speed button Filter button Enter button Test Run button Check button Clear button Airflow Up Down button Louver button Operation button To preceding operation number Ventilation button Operation button To next operation number Guide vane Air flow can be changed to horizontally by moving the Guide vane to the left or right Air...

Page 5: ...ponding timer is set Up Down Air Direction indica tor The indicator shows the direc tion of the outcoming airflow One Hour Only indicator Displayed if the airflow is set to weak and downward during COOL or DRY mode Operation varies according to model The indicator goes off after one hour at which time the airflow di rection also changes Room Temperature display Shows the room temperature Louver di...

Page 6: ...A A kW K min CFM Pa mmAq dB mm in mm in mm in mm in kg lbs Service Ref Mode Power supply phase cycle voltage Input Running current Starting current External finish Heat exchanger Fan Fan drive o No Fan motor output Airflow Low Medium2 Medium1 High External static pressure Operation control Thermostat Noise level Low Medium2 Medium1 High Unit drain pipe I D Dimensions Weight W D H INDOOR UNIT UNIT ...

Page 7: ...SHOLD OF HEARING FOR CONTINUOUS NOISE NC 60 NC 50 NC 40 NC 30 NC 20 NC 70 OCTAVE BAND SOUND PRESSURE LEVEL dB re 0 002 µ BAR BAND CENTER FREQUENCIES Hz PMH P25BA High NOTCH Medium1 Medium2 Low 35 SPL dB 33 31 29 LINE Ambient temperature 27 Test conditions are based on JIS Z8731 UNIT 1 5m MICROPHONE CEILING 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8000 APPROXIMATE THRESHOLD OF HEARI...

Page 8: ...le 17 5 17 5 45 340 suspension bolt pitch 45 430 ceiling opening 470 outer side of grille 20 20 74 5 Terminal block for indoor outdoor connection Terminal block for remote controller 812 96 Left side Front drain pan elect box Drainage pipe PVC pipe VP 20 O D 25 Refrigerant pipe gas Refrigerant pipe liquid ceiling panel drain pan ceiling panel PVC pipe VP 20 O D 25 1 O D 35 O D 12 7 1 2 O D 15 88 5...

Page 9: ...ic wiring for servicing 2 Indoor and outdoor connecting wires are made with polarities make wiring matching terminal numbers S1 S2 S3 3 Symbols used in wiring diagram above are Connector Terminal block Please set the voltage using the remote controller For the setting method please refer to the indoor unit Installation Manual SYMBOL LEGEND I B INDOOR CONTROLLER BOARD CN2L CONNECTOR LOSSNAY CN32 CO...

Page 10: ...ator temperature thermistor TH5 Room temperature thermistor TH1 Refrigerant flow in cooling Refrigerant flow in heating Strainer 50 Strainer 50 Heat exchanger Refrigerant GAS pipe connection Flare Refrigerant LIQUID pipe connection Flare 8 REFRIGERANT SYSTEM DIAGRAM PMH P25BA PMH P35BA PMH P50BA ...

Page 11: ...ve action according to TROUBLESHOOTING BY INFERIOR PHENOMENA 9 3 The inferior phenomenon is not reoccurring Logged Not logged 1Consider 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 inferior phenomenon...

Page 12: ...rature with remote controller in test run mode If pipe liquid temperature is exclusively low in cooling mode or high in heating mode refrigerant circuit may have defective 5 Check pipe liquid temperature with remote controller in test run mode If there is exclusive difference with actual pipe liquid temperature replace indoor controller board Turn the power off and on again to operate after check ...

Page 13: ...ontrol 6 Overcharge of refrigerant 7 Defective refrigerant circuit clogs Heating mode 1 Clogged filter reduced airflow 2 Short cycle of air path 3 Over load high temperature operation beyond the tolerance range 4 Defective indoor fan motor Fan motor is defective Indoor controller board is defective 5 Defective outdoor fan control 6 Overcharge of refrigerant 7 Defective refrigerant circuit clogs 8 ...

Page 14: ...ndoor units max 16units The number of connecting remote con troller max 2units 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 Put 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 is displayed...

Page 15: ... transmitting receiving circuit of indoor controller board 2 Noise has entered into power supply 3 Noise has entered into outdoor control wire 1 3 Turn the power off and on again to check If abnormality generates again replace indoor controller board Indoor outdoor unit communication error Signal receiving error 1 Abnormal if indoor controller board cannot receive any signal normally for six minut...

Page 16: ...ard is defective When LED1 on indoor controller board is lit 1 Mis setting of refrigerant address for outdoor unit There is no unit corresponding to refrigerant address 0 1 Reconfirm the setting of refrigerant address for outdoor unit Set the refrigerant address to 0 For grouping control system under which 2 or more outdoor units are connected set one of the units to 0 Set refrigerant address usin...

Page 17: ...l emergency operation must be within 10 hours Otherwise heat exchanger of indoor unit may get frosted 5 After completing the emergency operation return the switch setting etc in former state 6 Since vane does not work at emergency operation position the vane slowly by hand 9 5 HOW TO CHECK THE PARTS PMH P25BA PMH P35BA PMH P50BA Parts name Check points Disconnect the connector then measure the res...

Page 18: ...he connecter FAN 1 and 3 Approx 1 3V between the connecter FAN 5 and 3 The voltage between the 5 and 3 is a value during the fan motor operation In the case that the fan motor off the voltage is 0V Fan motor position sensor signal check Turn around the fan motor more than one revolution slowly and check the voltage between the connecter FAN 6 and 3 Check method of indoor fan motor fan motor contro...

Page 19: ...ture thermistor TH5 Thermistor R0 15kΩ 3 Fixed number of B 3480 2 Rt 15exp 3480 0 15kΩ 10 9 6kΩ 20 6 3kΩ 25 5 4kΩ 30 4 3kΩ 40 3 0kΩ Thermistor R0 6 0kΩ 5 Fixed number of B 3390 2 Rt 6exp 3390 0 6 0kΩ 10 3 9kΩ 20 2 6kΩ 25 2 2kΩ 30 1 8kΩ 40 1 3kΩ Thermistor for lower temperature 1 273 t 1 273 1 273 t 1 273 20 0 20 40 60 80 Thermistor for drain sensor Temperature 0 1 2 3 4 5 6 7 8 9 10 Resistance K T...

Page 20: ...r Liquid TH2 CN29 Condenser Evaporator temperature thermistor TH5 CN6V Vane motor output MV CN41 Connector HA terminal A CN2L Connector LOSSNAY Jumper wire J41 J42 Pair number setting with wireless remote controller CN03 Connect to the outdoor unit Between 1 to 3 220 240V AC Between 3 to 5 0 24V DC Jumper wire J21 J24 Capacity setting Jumper wire J11 J15 Model setting SWE Emergency operation CN25 ...

Page 21: ...42 Settings at time of factory shipment Wireless remote controller 0 Control PCB for both J41 and J42 Four pair number settings are supported The pair number settings of the wireless remote controller and indoor control PCB J41 J42 are given in the table on the left in the table indicates the jumper line is disco nnected Marks in the table below Jumper wire Short Open DIP switch ON OFF MODELS SW1 ...

Page 22: ...Opening the air intake grille 1 Press the of air intake grille and pull down the both end of nut with your fingers after the grille clicked See figure 1 2 Pull out the handle of air intake grille strong toward you See figure 2 3 Draw the string of air intake grille to prevent the grille from dropping see figure 3 PUSH Removing the air intake grille Be careful on removing heavy parts Photo 1 Figure...

Page 23: ...erial as before as shown in right figure The insulation material consists of soft and hard layers Mount the insulation with the hard layer on the stabilizer side 1 Remove the panel 2 Remove the room temperature thermistor 3 Unhook the claw in the middle of stabilizer and remove the drain pan 5 screws See photo 2 4 Remove the stabilizer side of the heat exchanger 2 screws 5 Remove the cover 6 Remov...

Page 24: ...screws in the motor support 11 Remove the fan motor and line flow fan The fan motor and line flow fan can be removed without removing the heat exchanger Photo 6 Drain pump Fan motor Drain sensor Photo 7 Fan motor Line flow fan 7 Removing the thermistor Room temperature thermistor 1 Remove the panel 2 Bring down the electrical parts box and remove the cover 3 Remove the thermistor Room temperature ...

Page 25: ... CATCH RECEIVER COVER MAGNET SCREW CAP REMOTE CONTROLLER REMOTE CONTROLLER CABLE No Part No Part Name Specification Q ty set Price Unit Amount Remarks Drawing No Wiring Diagram Symbol Recom mended Q ty PMH P25 35 50BA T7W E11 003 R01 E00 055 R01 E00 099 R01 E01 054 R01 E01 500 R01 E02 500 T7W E01 691 R01 E00 054 R01 E00 648 R01 E00 044 R01 E00 096 T7W E08 713 T7W E01 305 6 7 8 9 10 11 12 11 1 2 3 ...

Page 26: ...TOR SUPPORT FAN MOTOR MOTOR MOUNT DRAIN PIPE CONTROL BOX COVER SCREW ASSY No Part No Part Name Specification Q ty set Price Unit Amount Remarks Drawing No Wiring Diagram Symbol Recom mended Q ty 35 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 25 50 R01 22A 102 R01 005 103 R01 E02 114 T7W E01 079 R01 E00 092 T7W E69 480 T7W E70 480 R01 E10 529 R01 E00 202 R01 E00 038 R01 E41 202 R01 E44 202 R0...

Page 27: ...SE INDOOR CONTROLLER BOARD No Part No Part Name Specification Q ty set Price Unit Amount Remarks Drawing No Wiring Diagram Symbol Recom mended Q ty PMH P25 35 50 BA 3P S1 S2 S3 2P 1 2 250V 6 3A T7W E13 716 T7W 515 716 T7W 520 239 T7W E26 310 4 5 ELECTRICAL PARTS PMH P25BA PMH P35BA PMH P50BA 1 2 3 ...

Page 28: ... 3 MARUNOUCHI CHIYODA KU TOKYO 100 8310 JAPAN CCopyright 2005 MITSUBISHI ELECTRIC ENGINEERING CO LTD Distributed in Jul 2005 No OC333 PDF 9 Made in Japan New publication effective Jul 2005 Specifications subject to change without notice TM ...

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