Mitsubishi Electric PUHZ-P100VHA2 Service Manual Download Page 94

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OPERATING PROCEDURE

PHOTOS

12. Removing the compressor (MC)

(1) Remove the service panel. (See figure 1.)
(2) Remove the top panel. (See figure 1.)
(3) Remove 2 front cover panel fixing screws (5

10) and

remove the front cover panel. (See photo 3.)

(4) Remove 2 back cover panel fixing screws (5

10) and

remove the back cover panel.

(5) Remove the electrical parts box. (See photo 3.)
(6) Remove 3 valve bed fixing screws (4

10) and 4 stop valve

fixing screws (5

16) and then remove the valve bed.

(7) Remove 3 right side panel fixing screws (5

10) in the

rear of the unit and then remove the right side panel.

(8) Remove 3 separator fixing screws (4

10) and remove

the separator.

(9) Remove the terminal cover and then remove the lead wire

for compressor.

(10) Remove the soundproof cover for compressor.
(11) Recover refrigerant.
(12) Remove the 3 points of the motor for compressor fixing

nut using a spanner or a adjustable wrench.

(13) Remove the welded pipe of motor for compressor inlet

and outlet and then remove the compressor.

Note: Recover refrigerant without spreading it in the air.

13. Removing the accumulator

(1) Remove the service panel. (See figure 1.)
(2) Remove the top panel. (See figure 1.)
(3) Remove 2 front cover panel fixing screws (5

10) and

remove the front cover panel. (See photo 3.)

(4) Remove 2 back cover panel fixing screws (5

10) and

remove the back cover panel.

(5) Remove the electrical parts box. (See photo 3.)
(6) Remove 3 valve bed fixing screws (4

10) and 4 stop valve

fixing screws (5

16) and then remove the valve bed.

(7) Remove 3 right side panel fixing screws (5

10) in the

rear of the unit and then remove the right side panel.

(8) Recover refrigerant.
(9) Remove welded pipes of accumulator inlet and outlet.
(10) Remove 2 accumulator leg fixing screws (4

10).

Note: Recover refrigerant without spreading it in the air.

Accumulator leg
fixing screws

Accumulator

Inlet

Outlet

Separator

fixing screw

Soundproof
cover for
compressor

Photo 11

Terminal cover

OCH415A-4.qxp 08.2.21 8:13 AM Page 94

Summary of Contents for PUHZ-P100VHA2

Page 1: ... on the spec name plate CONTENTS 1 TECHNICAL CHANGES 2 2 REFERENCE MANUAL 2 3 SAFETY PRECAUTION 3 4 FEATURES 6 5 SPECIFICATIONS 7 6 DATA 8 7 OUTLINES AND DIMENSIONS 11 8 WIRING DIAGRAM 13 9 WIRING SPECIFICATIONS 14 10 REFRIGERANT SYSTEM DIAGRAM 19 11 TROUBLESHOOTING 21 12 FUNCTION SETTING 70 13 EASY MAINTENANCE FUNCTION 77 14 MONITORING THE OPERATION DATABYTHE REMOTE CONTROLLER 80 15 DISASSEMBLY P...

Page 2: ... PKA RP50GAL OC330 PSA RP71 100 125 140GA PSA RP71 100 125 140GA OC332 PKA RP60 71 100FAL PKA RP60 71 100FAL PKA RP50FAL2 PKA RP50FAL2 OC331 PEAD RP60 71 100GA PEAD RP60 71 100GA UK HWE05060 PEAD RP50 60 71 125 140EA PEAD RP100EA2 PEAD RP50 60 71 125 140EA UK PEAD RP100EA2 UK HWE05210 INDOOR UNIT S SERVICE MANUAL PUHZ P125VHA2 PUHZ P125VHA21 PUHZ P140VHA2 PUHZ P140VHA21 4 WAY VALVE and COIL 21S4 h...

Page 3: ...ed for use with R410A refrigerant The following tools are necessary to use R410A refrigerant Keep the 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 of refrigera nt will change and the efficiency will be lowered Flare to...

Page 4: ...ion side pressure of 5 3MPa G or over 2 Charge hose Only 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 OCH415A 1 qx...

Page 5: ...dimensions inch Flare nut dimensions Outside diameter Dimension B mm R410A w w36 0mm for indoor unit of RP100 125 and 140 R22 Gauge manifold Charge hose Gas leak detector Refrigerant recovery equipment Refrigerant cylinder Applied oil Safety charger Charge valve Vacuum pump Flare tool Bender Pipe cutter Welder and nitrogen gas cylinder Refrigerant charging scale Vacuum gauge or thermis tor vacuum ...

Page 6: ...nt level regardless of the length 30m max and 5m min of piping The additional refrigerant charging work during installation often causes problems Heretofore it is completely eliminated This unique system improves the quality and reliability of the work done It also helps to speed up the installation time PUHZ P100VHA2 UK PUHZ P125VHA2 UK PUHZ P140VHA2 UK PUHZ P125VHA21 UK PUHZ P140VHA21 UK OCH415A...

Page 7: ...0V OUTDOOR UNIT REFRIGERANT PIPING 28 A A kW W kW K min CFM dB dB mm in mm in mm in kg lbs kg lbs L mm in mm in Power supply phase cycle voltage Running current Max current External finish Refrigerant control Compressor Model Motor output Starter type Protection devices Crankcase heater Heat exchanger Fan Fan drive o No Fan motor output Airflow Defrost method Noise level Dimensions Weight Refriger...

Page 8: ... 8 5 7 5 7 3 0 4 5 4 5 Service Ref PUHZ P100VHA2 UK PUHZ P125VHA2 UK PUHZ P125VHA21 UK PUHZ P140VHA2 UK PUHZ P140VHA21 UK U V U W W V Unit Compressor model Winding Resistance TNB306FPGM at 20 C 0 53 0 53 0 53 PUHZ P125 140VHA2 UK PUHZ P125 140VHA21 UK TNB220FLHMT 0 88 0 88 0 88 PUHZ P100VHA2 UK Longer pipe than 20 or 30m additional charge is required OCH415A 1 qxp 08 2 21 8 17 AM Page 8 ...

Page 9: ...00 4000 8000 APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE OCTAVE BAND SOUND PRESSURE LEVEL dB 0 dB 0 0002 µbar BAND CENTER FREQUENCIES Hz NC 60 NC 50 NC 40 NC 30 NC 20 NC 70 PUHZ P125VHA2 UK PUHZ P125VHA21 UK COOLING MODE HEATING 51 SPL dB 55 LINE 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8000 APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE OCTAVE BAND SOUND PRESSURE ...

Page 10: ...or unit D B W B D B D B W B PLA RP100BA PLA RP125BA PLA RP140BA PLA RP100BA PLA RP125BA PLA RP140BA Cooling 9 400 3 12 Heating 11 200 3 28 Cooling 12 300 4 09 Heating 14 000 4 11 Cooling 13 600 5 21 Heating 16 000 4 98 12 26 2 90 29 6 0 92 9 4 72 7 48 6 10 1 5 27 19 14 8 35 24 0 74 0 21 12 62 2 57 26 2 0 62 6 3 75 5 41 4 0 1 5 20 15 43 4 7 6 17 37 2 68 27 3 0 86 8 8 67 8 45 5 6 8 5 27 19 13 6 35 2...

Page 11: ...0 Please secure the unit firmly with 4 foundation M10 bolts Bolts and washers must be purchased locally Foundation bolt height Handle for moving Side Air Intake Front piping cover Rear piping cover 145 220 30 145 81 219 145 71 71 Drain hole 5 33 Bottom piping hole Knockout Air Intake Rear Air Intake Handle for moving Handle for moving 23 943 473 950 322 w 1 447 w 1 443 670 Terminal Connections Lef...

Page 12: ...s 1 FREE SPACE Around the unit 2 SERVICE SPACE 3 FOUNDATION BOLTS 4 PIPING WIRING DIRECTIONS Piping and wiring connections can be made from 4 directions front right rear and below 30 FOUNDATION 150 500 500 10 Service space 600 175 175 330 417 42 66 53 56 45 19 28 370 2 U Shaped notched holes Foundation Bolt M10 2 12 x 36 Oval holes Foundation Bolt M10 Installation Feet 30 45 40 65 92 27 55 23 73 6...

Page 13: ...ting Diodes Operation Inspection Indicators CNM CNMNT CNVMNT CNDM Connector A Control Service Inspection Kit Connector Connected to Optional M NET Adapter Board Connector Connected to Optional M NET Adapter Board Connector Connected for Option Contact Input X51 X52 X54 X55 Relay CNVMNT WHT CNMNT WHT CNM WHT CN5 WHT CN2M WHT CND WHT CN4 WHT CN2 WHT 21S4 GRN SS WHT CN52C BLK CN5 RED RED CNAC2 WHT CN...

Page 14: ...polychloroprene sheathed flexible cord Design 60245 IEC 57 3 Install an earth longer than other cables S1 S2 S3 S1 S2 S3 Warning In case of A control wiring there is high voltage potential on the S3 terminal caused by electrical circuit design that has no electrical insulation between power line and communication signal line Therefore please turn off the main power supply when servicing And do not...

Page 15: ...or unit specifications Required Required Required 1 A breaker with at least 3 mm contact separation in each pole shall be provided Use earth leakage breaker NV 2 Max 120 m 3 The 10 m wire is attached in the remote controller accessory Max 500 m 4 The figures are NOT always against the ground Notes 1 Wiring size must comply with the applicable local and national code 2 Power supply cords and indoor...

Page 16: ...unit Outdoor unit earth Wire No o Size E w The optional indoor power supply terminal kit is necessary 1 In case that cable with stripe of yellow and green is available 2 In case that the flat cables are connected as this picture they can be used up to 80m 3 In case of regular polarity connection S1 S2 S3 wire size is 1 5mm 2 4 In case of regular polarity connection S1 S2 S3 5 Mentioned cable lengt...

Page 17: ...ire noise may enter into the shield wire because the ground wire and shield wire form 1 circuit and the electric potential difference occurs due to the impedance difference among grounding spots In case of single spot grounding noise does not enter into the shield wire because the ground wire and shield wire do not form 1 circuit To avoid communication errors caused by noise make sure to observe t...

Page 18: ...1 23 4 5 6 7 8 9 0 1 23 4 5 6 7 8 9 0 1 23 4 5 6 7 8 9 0 1 23 4 5 6 7 8 9 0 1 23 4 5 6 7 8 9 0 1 23 4 5 6 7 8 9 0 1 2 50 M NET Address No Setting example Switng setting SW11 ones digit SW12 tens digit OFF ON 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6 ...

Page 19: ...Bypass valve Outdoor heat exchanger Thermistor TH3 Thermistor TH6 Distributor Service port check Service port check Accumulator Compressor Refrigerant GAS pipe 15 88mm 5 8 Refrigerant LIQUID pipe 9 52mm 3 8 Stop valve with service port 4 way valve Service port check High pressure protect switch Linear expansion valve Thermistor TH4 Muffler Stop valve 50 Strainer 100 Strainer Strainer 40 100 Strain...

Page 20: ...valve completely and then repeat step 2 3 minutes later wIf the refrigerant recovering operation has been completed normally LED1 is not lit and LED2 is lit the unit will remain stopped until the power supply is turned off 4Turn off the power supply circuit breaker 2 Start and finish of test run Operation from the indoor unit Execute the test run using the installation manual for the indoor unit O...

Page 21: ... parts such as electrical component controller board remote controller and etc 1Re check the abnormal symptom 2Conduct trouble shooting and ascertain the cause of the trouble according to 11 5 Troubleshooting by inferior phenomena 3Continue to operate unit for the time being if the cause is not ascertained 4There is no abnormality concerning of parts such as electrical component controller board r...

Page 22: ...rnately F1 After startup is displayed green once and red twice blink alternately F3 F5 F9 After startup is displayed green twice and red once blink alternately EA Eb After startup is displayed only green lights up 00 After startup is displayed only green lights up 00 indicates digital display 2 Press TEST button twice 1 Turn on the main power supply 3 Press OPERATION SWITCH button 4 Press AIR DIRE...

Page 23: ...turned off and current operation mode are displayed 3 Press the button to activate mode then check whether cool air is blown out from the unit 4 Press the button to activate mode then check whether warm air is blown out from the unit 5 Press the button and check whether strong air is blown out from the unit 6 Press the button and check whether the auto vane operates properly 7 Press the ON OFF but...

Page 24: ...atest check code can be recalled even if it is cancelled by the remote controller or power is shut off Check the error code history for each unit using the remote controller 1 Switch to self diagnosis mode H Press the CHECK button twice within 3 seconds The display content will change as shown below 2 Set the unit number or refrigerant address you want to diagnose F Press the TEMP buttons and to s...

Page 25: ...change as shown below A Press the FILTER button to start self diagnosis 3 Remote controller self diagnosis result When the remote controller is functioning correctly Check for other possible causes as there is no problem with the remote controller When the remote controller malfunctions Error display 1 NG flashes The remote controller s transmitting receiv ing circuit is defective The remote contr...

Page 26: ...tion manual If an air conditioner error occurs the indoor unit s sensor emits an intermit tent buzzer sound the operation light flashes and the error code is output It takes 3 seconds at most for error code to appear The check mode is cancelled Malfunction diagnosis method at maintenance service 11 3 4 Malfunction diagnosis method by wireless remote controller In case of trouble during operation W...

Page 27: ...er of times Wireless remote controller Wired remote controller Beeper sounds OPERATION INDICATOR lamp blinks Check code Number 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 open 5 P5 Drain pump error PA Forced comp...

Page 28: ...ly terminal block TB1 2 Check following items a Connection of power supply terminal block TB1 b Connection of terminal on outdoor power circuit board Disconnection of connector TABT or TABS Refer to 11 9 3 Check connection of the connector CNDC on the outdoor controller circuit board Check connection of the connector CNDC on the outdoor power circuit board Refer to 11 9 4 Check connection of react...

Page 29: ...Abnormal if the number cannot be checked automatically due to miswiring of indoor outdoor unit connecting wire and etc after power is turned on for 4 minutes 2 Abnormal if outdoor controller circuit board recognizes the number of connected indoor units as 4 units or more 1 Check disconnection or looseness or polarity of indoor outdoor unit connecting wire of indoor and outdoor units 2 Check diamet...

Page 30: ...5 7 Check linear expansion valve Refer to 11 6 8 Replace outdoor controller board Case U2 1102 High discharging temperature 1 Abnormal if discharge temperature thermistor TH4 exceeds 125 or 110 continuously for 5 minutes Abnormal if condenser evaporator temperature thermistor TH5 exceeds 40 during defrosting and discharge temperature thermistor TH4 exceeds 110 2 Abnormal if discharge super heat Co...

Page 31: ...g of the lead wire for thermistor TH4 Refer to 11 9 2 Check resistance value of thermistor TH4 or temperature by microcomputer Thermistor TH4 Refer to 11 6 SW2 on A Control Service Tool Refer to 11 10 3 Replace outdoor controller board U4 TH3 5105 TH6 5107 TH7 5106 TH8 5110 Open short of outdoor unit thermistors TH3 TH6 TH7 and TH8 Abnormal if open or short is detected during compressor operation ...

Page 32: ...cuit board Refer to 11 9 UF 4100 Compressor overcurrent interruption When compressor locked Abnormal if overcurrent of DC bus or compressor is detected within 30 seconds after compressor starts operating 1 Stop valve is closed 2 Decrease of power supply voltage 3 Looseness disconnection or converse of compressor wiring connection 4 Defective compressor 5 Defective outdoor power board 1 Open stop v...

Page 33: ...troller board cannot receive any signal from remote controller for 2 minutes Error code E4 1 Check disconnection or looseness of indoor unit or transmission wire of remote controller 2 Set one of the remote controllers main If there is no problem with the action above 3 Check wiring of remote controller Total wiring length max 500m Do not use cablex 3 or more The number of connecting indoor units ...

Page 34: ... outdoor controller circuit board and M NET board is not available 1 Check disconnection looseness or breaking of connection wire between outdoor controller cir cuit board CNMNT and M NET board CN5 2 Check disconnection looseness or breaking of connection wire between outdoor controller cir cuit board CNMNT and M NET board CND 3 Check M NET transmission wiring method E8 6840 Indoor outdoor unit co...

Page 35: ...troller is not connected to terminal block for central control TB7 of outdoor unit 2 Check if transmission wire of indoor unit FRESH MASTER or LOSSNAY is not con nected to terminal block for transmission wire of outdoor unit 3 Check if terminal block for transmission wire TB3 and terminal block for central control TB7 is not connected 4 Check transmission wave form or noise on transmission wire M ...

Page 36: ...ctor CN2M of outdoor unit 3 Defective transmitting receiv ing circuit of outdoor unit or indoor unit Always try the followings when the error A7 occurs 1 Turn off the power supply of outdoor unit indoor unit and FRESH MASTER or LOSS NAY at the same time for 2 minutes or more and turn the power on again If malfunction was accidental the unit returns to normal 2 Check address switch of abnormality g...

Page 37: ...s tem with LOSSNAY is turned off or within 2 minutes of restart abnormality is detect ed 3 Contact failure of transmission wire of indoor unit of LOSS NAY 4 Disconnection of transmission connector CN2M of indoor unit 5 Defective transmitting receiv ing circuit of indoor unit or LOSSNAY 7 When displayed address or attribute is nonexistent 1 The unit of former address does not exist as address switc...

Page 38: ...ED3 on indoor controller board 1 When LED3 is not blinking Check indoor outdoor connecting wire for miswiring Converse wiring of S1 and S2 or break of S3 wiring 2 When LED3 is blinking Indoor outdoor connecting wire is normal 4Check LED display on outdoor controller circuit board Refer to 11 10 Check protection device connector 63L and 63H for contact failure Refer to 11 9 Error Code Abnormal poin...

Page 39: ...mote controller 12Normal operation For protection of compressor 12Normal operation 4 Even controlling by the wireless remote controller no beep is heard and the unit does not start operat ing Operation display is indicated on wireless remote controller 1The pair number settings of the wireless remote controller and indoor controller board are mis matched 1Check the pair number settings 5 When oper...

Page 40: ...n the main power Normal The start up diagnosis will be over in around 2 minutes Mis wiring of indoor outdoor connecting wire Breaking of indoor outdoor connecting wire S3 Defective indoor controller board Defective outdoor controller circuit board Refer to Self diagnosis action table in order to solve the trouble In case of communication errors the display of remote controller may not match the LE...

Page 41: ... Check the wiring of the outdoor unit Check if the wiring is bad Check if the fuses are blown The fuses on the outdoor controller circuit board will be blown when the indoor outdoor connecting wire short circuits Bad wiring of the outdoor controller board The fuses on the outdoor controller circuit board are blown Check if miswiring breaking or poor contact is causing this problem Indoor outdoor c...

Page 42: ...circuit board Replace the outdoor controller circuit board Normal Only the unit which has the refrigerant address 0 supplies power to the remote controller Set the refrigerant address to 0 In case of the multiple grouping system recheck the refrigerant address again Defective indoor power board Replace the indoor power board Defective outdoor power circuit board Replace the outdoor power circuit b...

Page 43: ...te controller wire Check the voltage of the terminal block TB5 connecting the remote controller wire If it is not between DC 10V and DC16V the indoor controller board must be defective The remote controller wire short circuits Check if the remote controller wire is short circuited Defective indoor controller board Replace the indoor controller board Diagnosis flow Cause Inspection method and troub...

Page 44: ...TER from the display See the operation manual that came with the product for how to clean the filters 3 STANDBY is displayed on the screen 3 This is displayed when the unit starts HEAT operation when the thermostat puts the compressor in operation mode or when the outdoor unit ends DEFROST operation and returns to HEAT operation The display will automatically disappear around 10 minutes later Whil...

Page 45: ...s controlling the airflow amount in order to keep the optimum operating condition 5 A sound similar to water flowing is heard from the unit 5 This is not a malfunction This is the sound which is heard when the refrigerant is flowing inside the indoor unit 2 The fan speed doesn t match the setting of the remote controller in HEAT operation The up down vane will be automatically set to horizontal bl...

Page 46: ...irection doesn t change Up down vane left right louver 3 1 Check if the vane is set to a fixed position Check if the vane motor connector is removed 2 Check if the air conditioner has a function for switching the air direction 3 If the air conditioner doesn t have that function NOT AVAILABLE will be displayed on the remote controller when AIR DIRECTION or LOUVER button is pressed Something is wron...

Page 47: ... water drips down from the heat exchanger Make use of optional parts Drain Socket and Drain pan if these water needs to be collected and drained out for once Water or moisture is expelled from the outdoor unit Batteries are being exhausted Replace them and press the reset button of remote controller The display of wireless remote controller gets dim or doesn t come on The indoor unit doesn t recei...

Page 48: ...EV A Normal Abnormal Open or short P100 P125 140VHA21 P125 P140VHA2 Disconnect the connector then measure the resistance with a tester Winding temperature 20 Normal Gray Black Gray Red Gray Yellow Gray Orange Abnormal 46 3 Open or short Measure the resistance between the terminals with a tester At the ambient temperature 20 Normal 1450 150 Abnormal Open or short Solenoid valve coil Bypass valve SV...

Page 49: ...eck Check the fuse F5 on outdoor controller board Power supply check Remove the connector CNF1 2 Measure the voltage in the outdoor controller circuit board TEST POINT 1 VDC between 1 and 4 of the fan connector VDC DC250 330V TEST POINT 2 VCC between 5 and 4 of the fan connector VCC DC15V Recover wiring Replace outdoor controller board Replace the fan motor Replace outdoor controller board C B and...

Page 50: ...17k 2 B constant 4150 3 Rt 17exp 4150 273 t 323 1 1 Thermistor R120 7 465k 2 B constant 4057 2 Rt 7 465exp 4057 273 t 393 1 1 Medium temperature thermistor Thermistor Heatsink TH8 20 250k 30 160k 40 104k 50 70k 60 48k 70 34k 80 24k 90 17 5k 100 13 0k 110 9 8k High temperature thermistor Thermistor Discharge TH4 0 10 20 30 40 50 20 10 0 10 20 30 40 50 Temperature Resistance k 200 150 100 50 0 25 50...

Page 51: ... sound can be heard No sound is heard when the pulse number moves from B to A in case coil is burn out or motor is locked by open phase Sound can be detected by placing the ear against the screw dri ver handle while putting the screw driver to the linear expansion valve LEV M 1 6 4 4 3 2 1 1 Gray Orange Red Yellow Black 3 4 5 6 Connector LEV A DC12V Outdoor controller board Drive circuit 3 2 1 3 2...

Page 52: ...due to pressure How to attach the coil Hold the lower part of the main body shown as A firmly so that the main body does not move and attach the coil by inserting it downward into the main body Then securely attach the coil stop per to main body At this time be careful that stress is not added to lead wire and main body is not wounded by lead wire If the stopper is not firmly attached to main body...

Page 53: ...r will continuously be operated by supplying power and stopping it It can not be turned on or off by remote control and temperature control is not possible 4Do not perform emergency heating operation for an extended period of time If the outdoor unit starts defrosting during this period cold air will blow out from the indoor unit 5Do not perform emergency cooling operation for more than 10 hours N...

Page 54: ...45 50 35 5 30deg 5deg HEAT 20 5 45 50 22 5 5 5 5 30deg 5deg w1 w1 w1 w2 w2 Remarks w1 If the thermistor temperature data is normal not open short that data is loaded into the control as valid data When the unit enters emergency operation and TH values are mismatched set the thermistors to open short And the unit runs emergency operation with the values listed above w2 If one thermistor is set to o...

Page 55: ...t refrigerant address CNDM 1 to 2 Input of low level sound priority mode 1 to 3 Input of external contact point TH4 Thermistor Discharge TH3 Thermistor Outdoor pipe TH7 6 Thermistor Outdoor 2 phase pipe CNDC 280V DC 1 3 Indoor power board VFG Voltage between right pins of PC5C and PC5D pin 3 and pin 4 Same as CNF17 4 VSP Voltage between pins of C5A C5B DC 0V when stopped DC 1 6 5V when operated CA...

Page 56: ...C is output Connect to the outdoor power circuit board TABS TABT Outdoor noise filter circuit board PUHZ P100VHA2 UK PUHZ P125VHA2 UK PUHZ P125VHA21 UK PUHZ P140VHA2 UK PUHZ P140VHA21 UK CN52C 52C driving signal Connect to the outdoor controller circuit board CN52C E2 Connect to the earth LI NI Voltage of 220 240V AC is input Connect to the terminal block TB1 OCH415A 2 qxp 08 2 21 8 15 AM Page 56 ...

Page 57: ... Connect to the outdoor controller circuit board TABS TABT Connect to the outdoor noise filter circuit board Voltage among phases 220 240V AC Brief Check of POWER MODULE W Usually they are in a state of being short circuited if they are broken Measure the resistance in the following points connectors etc If they are short circuited it means that they are broken 1 Check of diode bridge DS2 DS3 TABP...

Page 58: ...no problem if DIP SW1 1 is left ON or changed to OFF again This depends on the service conditions 11 10 FUNCTION OF SWITCHES CONNECTORS AND JUMPERS 1 Function of switches w2 Power failure automatic recovery can be set by either remote controller or this DIP SW If one of them is set to ON Auto recovery activates Please set Auto recovery basically by remote controller because all units do not have D...

Page 59: ... wiring is same with a Connect an SW 1 which is procured at field to the between Orange and Red 1 and 3 of the Adaptor for external signal input PAC SC36NA and insulate the tip of the brown lead wire It is possible to set it to the following power consumption compared with ratings by setting the SW7 1 2 59 2 Function of connectors and switches CN31 Types Connector Switch Function Effective timing ...

Page 60: ...r Remote controller signal receiving error is detected by indoor unit Remote controller transmitting error is detected by indoor unit Serial communication error Communication between outdoor controller board and outdoor power board Communication between outdoor controller board and M NET p c board Communication error of high prior signal M NET W1 Error code is displayed on remote controller W2 Ref...

Page 61: ...outdoor thermistors Abnormality of heatsink temperature 1Check if indoor outdoor units have a short cycle on their air ducts 2Measure resistance value of outdoor thermistor TH8 1Check the outdoor fan motor 2Check if the connector of TH3 on outdoor controller board is disconnected Abnormality of voltage 1Check looseness disconnection and converse connection of compressor wiring 2Measure resistance ...

Page 62: ...ng postponed wC5 is displayed during replacement operation 3 When the display blinks Inspection code is displayed when compressor stops due to the work of protection devices Display Contents to be inspected When power is turned on F5 E8 E9 EA Eb EC E0 E7 63H connector yellow is open Indoor outdoor communication error Signal receiving error Outdoor unit Indoor outdoor communication error Transmitti...

Page 63: ...reds digit tens digit and ones digit are displayed by turns Example When 2450 hours 245 10 hours 0 5 secs 0 5secs 2 secs 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 Compressor operating current 0 50 LEV A opening pulse 0 480 0 50 wOmit the figures after the decimal fractions 0 480 When it is 100 pulse or more hundreds digit tens digit and ones digit are displayed by turns Example When 150 pulse 0...

Page 64: ...splay of error unit number and code 3 217 When the temperature is 100 or more the hundreds digit tens digit and ones digit are displayed by turns Example When 130 0 5 secs 0 5secs 2 secs A Code display Code display 0 20 When no error history 0 and are displayed by turns When no error history 0 and are displayed by turns 1 ON 2 3 4 5 6 Thermo ON time 0 999 Test run elapsed time 0 120 0 999 When it ...

Page 65: ...ails 0 H P 1 Cooling only 0 Single phase 2 3 phase Setting details Defrosting switch Display details 0 Normal 1 For high humidity Example When heat pump 3 phase and defrosting normal are set up 20 is displayed 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 Indoor pipe temperature Cond Eva TH5 1 Indoor 1 39 88 39 88 When the temperature is 0 or less and temperature are displayed by turns 39 88 When the temperature ...

Page 66: ...ge 180 370 180 370 When it is 100V or more hundreds digit tens digit and ones digit are displayed by turns V 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 SW2 setting 1 ON 2 3 4 5 6 Display detail Explanation for display Unit 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 Indoor setting temperature 17 30 Outdoor pipe temperature Cond Eva TH6 39 88 Outdoor heatsink temperature TH8 40 20...

Page 67: ...t code display Blinking During postponement Lighting Cancellation of postponement 00 is displayed in case of no postponement Code display Error code history 3 Oldest Alternate display of abnormal unit num ber and code When no error history 0 and are displayed by turns Error thermistor display When there is no error thermistor is displayed 3 Outdoor pipe temperature Liquid TH3 6 Outdoor pipe temper...

Page 68: ...rature are displayed by turns Example When 15 C 0 5 secs 0 5secs 2 secs Outdoor pipe temperature Cond Eva TH6 on error occurring 39 88 39 88 When the temperature is 0 C or less and temperature are displayed by turns Example When 15 C 0 5 secs 0 5secs 2 secs Outdoor outside temperature TH7 on error occurring 39 88 39 88 When the temperature is 0 C or less and temperature are displayed by turns Exam...

Page 69: ...ed by turns Indoor pipe temperature Cond Eva TH5 3 Indoor 3 39 88 39 88 When the temperature is 0 C or less and temperature are displayed by turns When there is no indoor unit 00 is displayed 50 1 1 ON 2 3 4 5 6 Discharge super heat on error occurring SHd 0 255 Cooling TH4 TH6 Heating TH4 TH5 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 Minute 15 1 15 4 1 ON 2 3 4 5 6 Normal Overvol...

Page 70: ...T FUNCTION SETTING BY THE REMOTE CONTROLLER Each function can be set according to necessity using the remote controller The setting of function for each unit can only be done by the remote controller Select function available from the table 1 1 Functions available when setting the unit number to 00 Select 00 referring to 4 setting the indoor unit number W1 The functions below are available only wh...

Page 71: ...able Temperature correction Valid 24 1 mode 4 deg up Not available Temperature correction Invalid 2 Fan speed when the Extra low 1 heating thermostat is OFF Stop 25 2 Set fan speed 3 Fan speed when the Set fan speed 27 1 cooling thermostat is OFF Stop 2 Detection of abnormality of Available 28 1 the pipe temperature P8 Not available 2 PLA BA PLA BA 2 Functions available when setting the unit numbe...

Page 72: ...cified indoor unit BLOW operation Change refrigerant address or unit No 2 Switch to function setting mode Press A and B at the same time with the remote controller stopped 12 1 1 Selecting functions using the wired remote controller First try to familiarize yourself with the flow of the function selection procedure In this section an example of setting the room temperature detection position is gi...

Page 73: ...he unit number display area and the refrigerant address display area also blinks there are no units that corre spondtotheselectedunitnumber Inthiscase therefrigerantaddressandunit number may be incorrect so repeat steps 2 and 3 to set the correct ones When grouping different refrigerant systems if an indoor unit other than the one to which the refrigerant address has been set to perform fan operat...

Page 74: ... 4 seconds each repeated 3 times If a setting number that cannot be recognized by the unit is entered the setting will turn back to the original setting If the signal was not received by the sensor you will not hear a beep or a double beep may be heard Reenter the setting number 6 Repeat steps 4 and 5 to make an additional setting without changing unit number 7 Repeat steps 3 to 5 to change unit n...

Page 75: ...ing value The automatic mode is displayed when the operation mode is selected 2 OFF The automatic mode is not displayed when the operation mode is selected 4 3 Mode selection setting 1 Remote controller main sub setting To switch the setting press the ON OFF button 1 Main The controller will be the main controller 2 Sub The controller will be the sub controller 2 Use of clock setting To switch the...

Page 76: ...ode is not displayed when the operation mode is selected The temperature range limit is not active Initial setting value The temperature range can be changed on cooling dry mode The temperature range can be changed on heating mode The temperature range can be changed on automatic mode The remote controller will be the main controller Initial setting value The remote controller will be the sub cont...

Page 77: ...with the air conditioner stopped skip to step 4 Fixed Hz operation The operating frequency can be fixed to stabilize operation of inverter model If the air conditioner is currently stopped start it by this operation 2 Press the MODE button to select the desired operation mode Display A 3 Press the FILTER button to confirm the setting Display D Waiting for stabilization HEAT STABLE MODE STABLE MODE...

Page 78: ...Comp discharge temperature Outdoor ambient temperature INDOOR UNIT INLET TEMP INDOOR UNIT H EXC TEMP INDOOR UNIT FILTER USE H Indoor room temperature Heat exchanger temperature Filter operating time 12 340 hours Display C Waiting for response Blinking After approx 10 seconds 1 1 Refrigerant address 00 Twin Refrigerant address 00 Outdoor unit Indoor unit 02 Indoor unit 01 Outdoor unit Remote contro...

Page 79: ...er temperature 7 Indoor intake air temperature Cool Classification Item Result Inspection Temperature difference Heat Inspection Temperature difference Stable Unstable Stable Unstable Fixed Hz operation may not be possible under the following tempera ture ranges A In cool mode outdoor intake air temperature is 40 or higher or indoor intake air temperature is 23 or lower B In heat mode outdoor inta...

Page 80: ...d to select the desired refrigerant address Screen B 4 Press the CLOCK buttons and to set the desired request code No 5 Press the FILTER button to perform data request The requested data will be displayed at C in the same way as in maintenance mode Data collected during operation of the remote controller will be displayed The collected data such as temperature data will not be updated automaticall...

Page 81: ...ndoor unit Intake air temperature Unit No 1 Heat mode 4 deg correction Indoor unit Intake air temperature Unit No 2 Heat mode 4 deg correction Indoor unit Intake air temperature Unit No 3 Heat mode 4 deg correction Indoor unit Intake air temperature Unit No 4 Heat mode 4 deg correction Indoor unit Liquid pipe temperature Unit No 1 Indoor unit Liquid pipe temperature Unit No 2 Indoor unit Liquid pi...

Page 82: ...history 1 latest Outdoor unit Error postponement history 2 previous Outdoor unit Error postponement history 3 last but one 0 255 Refer to14 2 1 DetailContentsinRequestCode Refer to14 2 1 DetailContentsinRequestCode Refer to14 2 1 DetailContentsinRequestCode Refer to14 2 1 DetailContentsinRequestCode 0000 Not connected Examples Ver 5 01 Auxiliary information displayed after version information Exam...

Page 83: ...to last Abnormal thermistor display TH3 TH6 TH7 TH8 Operation mode at time of error Compressor Operating current at time of error Compressor Accumulated operating time at time of error Compressor Number of operation times at time of error Discharge temperature at time of error Outdoorunit Liquidpipe1temperature TH3 attimeoferror Outdoor unit Liquid pipe 2 temperature at time of error Outdoor unit ...

Page 84: ... time Indoor fan output value Sj value Indoor fan output value Pulsation ON OFF Indoor fan output value duty value Indoor unit Model setting information Indoor unit Capacity setting information Indoor unit SW3 information Wireless pair No indoor control board side setting Indoor unit SW5 information Indoor unit Microcomputer version information Indoor unit Microcomputer version information sub No ...

Page 85: ...ut state Operation mode Indoor unit Control state Request code 50 Data display Operation mode Display Operation mode 0 STOP FAN C COOL DRY H HEAT d Defrost Relay output state Display Power currently Compressor Four way valve Solenoid valve supplied to compressor Unit No 4 state Unit No 3 state Unit No 2 state Unit No 1 state Display State 0 Normal 1 Preparing for heat operation 2 3 4 Heater is ON ...

Page 86: ...e Compressor 0 1 2 3 4 5 6 7 8 9 A b C d E F ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON Actuator output state 2 Display 52C SV2 SS 0 1 2 3 4 5 6 7 ON ON ON ON ON ON ON ON ON ON ON ON Error content U9 Request code 55 Data display Error content 1 Error content 2 0 0 Error content 1 Detected Display Overvoltage Undervoltage L1 phase Power synchroni...

Page 87: ...Data display Capacity 10 50 9 35 11 60 14 71 20 100 25 125 28 140 40 200 50 250 Outdoor unit Setting information Request code 71 Data display Setting information 1 Setting information 2 0 0 Setting information 1 Display Defrost mode 0 Standard 1 For high humidity Setting information 2 Display Single Heat pump 3 phase cooling only 0 Single phase Heat pump 1 Cooling only 2 3 phase Heat pump 3 Coolin...

Page 88: ... 1 1 1 0 1 0 1 1 1 1 1 0 1 1 1 0 0 1 1 1 1 1 0 1 1 1 1 0 1 1 1 1 1 1 1 1 1 1 1 Outdoor unit switch setting display SW1 to SW10 except SW3 Request codes 73 to 82 0 Swich OFF 1 Swich ON Data display SW5 1 2 3 4 0 0 0 0 00 00 1 0 0 0 00 01 0 1 0 0 00 02 1 1 0 0 00 03 0 0 1 0 00 04 1 0 1 0 00 05 0 1 1 0 00 06 1 1 1 0 00 07 0 0 0 1 00 08 1 0 0 1 00 09 0 1 0 1 00 0A 1 1 0 1 00 0b 0 0 1 1 00 0C 1 0 1 1 0...

Page 89: ...3 14 34 15 35 16 36 17 37 18 38 19 39 1A 3A 1b 3b 1C 3C 1d 3d 1E 3E 1F 3F Indoor unit Capacity setting information Request code 163 Data display 0 0 See the table on the right Display Capacity setting state Display Capacity setting state 00 12 10 112 01 16 11 125 02 22 12 140 03 25 13 160 04 28 14 200 05 32 15 224 06 35 36 16 250 07 40 17 280 08 45 18 09 50 19 0A 56 1A 0b 63 1b 0C 71 1C 0d 80 1d 0...

Page 90: ...C Photo 1 Fan motor MF1 Fan motor fixing screws Propeller Front panel Front panel fixing screws Nut Terminal block TB1 Photo 2 Valve bed Slide 3 Removing the electrical parts box 1 Remove the service panel See figure 1 2 Remove the top panel See figure 1 3 Disconnect the indoor outdoor connecting wire from terminal block 4 Remove all the following connectors from controller circuit board fan motor...

Page 91: ...troller circuit board in the electrical parts box 4 Loosen the clamp for the lead wire in the rear of the electrical parts box See photo 4 5 Pull out the thermistor Outdoor TH7 from the sensor holder Note In case of replacing thermistor Outdoor TH7 replace it together with thermistor Outdoor 2 phase pipe TH6 since they are combined together Refer to No 4 above to remove thermistor Outdoor 2 phase ...

Page 92: ...he welded part of 4 way valve Note 1 Recover refrigerant without spreading it in the air Note 2 The welded part can be removed easily by remov ing the right side panel Note 3 When installing the four way valve cover it with a wet cloth to prevent it from heating 120 C or more then braze the pipes so that the inside of pipes are not oxi dized 9 Removing the LEV 1 Remove the service panel See figure...

Page 93: ...4 Remove 3 right side panel fixing screws 5 10 in the rear of the unit and remove the right side panel 5 Pull out the lead wire of high pressure switch 6 Recover refrigerant 7 Remove the welded part of high pressure switch Note 1 Recover refrigerant without spreading it in the air Note 2 The welded part can be removed easily by removing the right side panel Note 3 When installing the high pressure...

Page 94: ...table wrench 13 Remove the welded pipe of motor for compressor inlet and outlet and then remove the compressor Note Recover refrigerant without spreading it in the air 13 Removing the accumulator 1 Remove the service panel See figure 1 2 Remove the top panel See figure 1 3 Remove 2 front cover panel fixing screws 5 10 and remove the front cover panel See photo 3 4 Remove 2 back cover panel fixing ...

Page 95: ...nnect the indoor outdoor connecting wire from terminal block 4 Remove all the following connectors from controller circuit board fan motor LEV thermistor Outdoor pipe thermistor Discharge thermistor Outdoor 2 phase pipe thermistor Outdoor high pressure switch 4 way valve coil Then remove a screw 4 8 from the valve bad to remove the lead wire Pull out the disconnected wire from the electrical parts...

Page 96: ...al parts box 4 Loosen the clamp for the lead wire in the rear of the electrical parts box See photo 4 5 Pull out the thermistor Outdoor TH7 from the sensor holder Note In case of replacing thermistor Outdoor TH7 replace it together with thermistor Outdoor 2 phase pipe TH6 since they are combined together Refer to No 4 above to remove thermistor Outdoor 2 phase pipe Photo 6 6 Removing the thermisto...

Page 97: ...cover refrigerant without spreading it in the air Note 2 The welded part can be removed easily by remov ing the right side panel Note 3 When installing the 4 way valve cover it with a wet cloth to prevent it from heating 120 C or more then braze the pipes so that the inside of pipes are not oxidized 9 Removing LEV 1 Remove the service panel See figure 1 2 Remove the top panel See figure 1 3 Remove...

Page 98: ...h a wet cloth to prevent it from heating 100 C or more then braze the pipes so that the inside of pipes are not oxidized Photo 9 Reactor fixing screw Reactor fixing screws Reactor DCL Electrical parts box 10 Removing bypass valve coil SV and bypass valve 1 Remove the service panel See figure 1 2 Remove the top panel See figure 1 3 Remove 3 right side panel fixing screws 5 10 in the rear of the uni...

Page 99: ...motor for compressor inlet and outlet and then remove the compressor Note Recover refrigerant without spreading it in the air 14 Removing the Accumulator 1 Remove the service panel See figure 1 2 Remove the top panel See figure 1 3 Remove 2 front cover panel fixing screws 5 10 and remove the front cover panel See photo 3 4 Remove 2 back cover panel fixing screws 5 10 and remove the back cover pane...

Page 100: ...ght 2007 MITSUBISHI ELECTRIC ENGINEERING CO LTD Distributed in Feb 2008 No OCH415 REVISED EDITION A PDF 7 Distributed in Apr 2007 No OCH415 PDF 7 Made in Japan New publication effective Feb 2008 Specifications subject to change without notice OCH415A 4 qxp 08 2 21 8 13 AM Page 100 ...

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Mitsubishi Electric PUHZ-P100VHA2, Service Manual

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