Mitsubishi Electric Mr.Slim PUHZ-P250YHA Service Manual Download Page 41

Page: 41 / 94

AC 198V to AC 264V?

Are there looseness or

disconnection of the indoor/

outdoor connecting wire?

Is anything displayed?

DC 17V to DC 28V?

Is “E8” displayed?

Can all the indoor

unit be operated?

Check the voltage between S2

and S3 on the terminal block of

the outdoor unit.

YES

Not lighting.

Blinking.

YES

Not displayed.

Displayed.

YES

Check the voltage between S1 and S2 on the terminal block (TB4)

of the indoor unit which is used to connect the indoor unit and the

outdoor unit.

Check the refrigerant address of

the outdoor unit. (SW1-3 to 1-6)

Check the looseness or disconnection

of the indoor/outdoor connecting wire.

Check the LED display of the

outdoor unit after turning on the

main power again.

Can the unit be restarted?

• Breaking or poor contact

of the indoor/outdoor

connecting wire

• Fix the breaking or poor

contact of the indoor/outdoor

connecting wire.

• Defective outdoor

controller 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 board.

• Defective indoor

controller board

• Replace the indoor controller

board of the indoor unit which

does not operate.

• Defective outdoor

controller circuit

board

• Replace the outdoor

controller circuit board.

• Influence of

electromagnetic noise

• Not abnormal.

There may be the influence

of electromagnetic noise.

Check the transmission wire

and get rid of the causes.

Symptoms: Nothing is displayed on the remote controller

Diagnosis flow

Cause

Inspection method and

troubleshooting

LED display of the indoor

controller board

LED1 :

LED2 :

LED3 : or

Check the status

of the indoor controller

board LED3 display.

Is the refrigerant

address “0”?

YES

Is “EA” or “Eb”

displayed?

OCH424E

Summary of Contents for Mr.Slim PUHZ-P250YHA

Page 1: ...RoHS compliant products have G mark 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 10 8 WIRING DIAGRAM 12 9 WIRING SPECIFICATIONS 13 10 REFRIGERANT SYSTEM DIAGRAM 18 11 TROUBLESHOOTING 20 12 FUNCTION SETTING 70 13 MONITORING THE OPERATION DATABY THE REMOTE CONTROLLER 77 14 EASY MAIN...

Page 2: ... RP35 50HAL OCH453 OCB453 PLA RP100BA3 PLA RP100BA3 OCH459 OCB459 PEAD RP35 50 60 71 100 125 140JA L PEAD RP35 50 60 71 100 125 140JA L R1 UK HWE08130 BWE08240 BWE09220 INDOOR UNIT S SERVICE MANUAL 1 TECHNICAL CHANGES PUHZ P200YHA3R2 PUHZ P200YHA3R3 PUHZ P250YHA3R2 PUHZ P250YHA3R3 The mounting location of CHARGE PLUG has been changed THERMISTOR has been changed Discharge black Shell white These ar...

Page 3: ...k detector Charge hose Tools for R410A Contamination inside refrigerant piping can cause deterio ration of refrigerant oil etc If dirt dust or moisture enters into refrigerant cycle that can cause deterioration of refrigerant oil or malfunction of com pressor If large amount of mineral oil enters that can cause deterio ration of refrigerant oil etc Make sure that the inside and outside of refrige ...

Page 4: ...e 7 Refrigerant cylinder Only for R410A Top of cylinder Pink Cylinder with syphon 8 Refrigerant recovery equipment 1 Cautions for service 1 Perform service after recovering the refrigerant left in unit completely 2 Do not release refrigerant in the air 3 After completing service charge the cycle with specified amount of refrigerant 4 When performing service install a filter drier simultaneously Be...

Page 5: ...17 0 22 0 24 0 27 0 36 0 Nominal dimensions inch Flare nut dimensions Outside diameter Dimension B mm R410A 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 gauge and vacu...

Page 6: ...gth 30 m max and 5 m min of piping The additional refrigerant charging work during installation often causes problems It is completely eliminated by chargeless system This unique system improves the quality and reliability of the work done It also helps to speed up the installation time PUHZ P200YHA PUHZ P250YHA PUHZ P200YHA3 PUHZ P250YHA3 PUHZ P200YHA3R1 PUHZ P250YHA3R1 PUHZ P200YHA3R2 PUHZ P250Y...

Page 7: ...ight difference Piping length Service Ref PUHZ P250YHA PUHZ P250YHA3 PUHZ P250YHA3R1 PUHZ P250YHA3R2 PUHZ P250YHA3R3 PUHZ P200YHA PUHZ P200YHA3 PUHZ P200YHA3R1 PUHZ P200YHA3R2 PUHZ P200YHA3R3 Cooling 9 47 Munsell 3Y 7 8 1 1 Linear Expansion Valve Hermetic YHA ANB52FFJMT or ANB52FFPMT YHA3 R1 R2 R3 ANB52FFPMT Line start Plate fin coil Propeller fan 2 0 150 0 150 130 2170 Reverse cycle 950 37 3 8 33...

Page 8: ...ng length one way 10m 20m 30m 40m 50m Factory charged 4 8 5 9 5 3 6 5 5 8 7 1 6 7 8 3 7 6 9 5 60m 8 5 10 7 70m 9 4 11 9 5 8 7 1 Service Ref PUHZ P200YHA PUHZ P200YHA3 PUHZ P200YHA3R1 PUHZ P200YHA3R2 PUHZ P200YHA3R3 PUHZ P250YHA PUHZ P250YHA3 PUHZ P250YHA3R1 PUHZ P250YHA3R2 PUHZ P250YHA3R3 U V U W W V Unit Compressor model Winding Resistance at 20 C ANB52FFJMT ANB52FFPMT 0 30 0 30 0 30 PUHZ P200 25...

Page 9: ...0 2 96 30 2 2 59 26 4 0 62 6 32 0 86 8 75 0 87 8 87 0 64 6 53 Electrical circuit Refrigerant circuit Indoor side Outdoor side Representative matching SHF BF Mode Capacity Input Total kgf kgf Phase Hz Voltage Input Current Outdoor unit Phase Hz Voltage Current Discharge pressure Suction pressure Discharge temperature Condensing temperature Suction temperature Ref pipe length Intake air temperature ...

Page 10: ...nation of particular details are given in the installation manuals etc 30 FOUNDATION 10 500 500 150 Service space FREE O v e r 1 0 m m O v e r 1 0 m m O v e r 1 5 0 m m O v e r 1 0 0 0 m m 53 40 56 0 70 175 600 175 330 30 370 28 19 417 60 37 2 12 36 oval holes Foundation Bolt M10 2 U Shaped notched holes foundation Bolt M10 Side Air Intake Rear Air Intake Air Discharge Installation Feet 999 995 1 ...

Page 11: ...ils are given in the installation manuals etc 30 FOUNDATION 10 500 500 150 Service space 53 40 56 0 70 175 600 175 330 30 370 28 19 417 60 37 2 12 36 oval holes Foundation Bolt M10 2 U Shaped notched holes foundation Bolt M10 Side Air Intake Rear Air Intake Air Discharge Installation Feet 999 995 1 A 2 339 950 322 23 371 635 1350 1 439 Handle for moving Handle for moving Terminal Connections Left ...

Page 12: ...ndoor Outdoor Motor for Compressor Fan Motor Solenoid Valve Four Way Valve High Pressure Switch Thermistor Outdoor Pipe SC U V W TB L1 L2 L3 Connection Terminal U V W Phase Thermistor Discharge Thermistor Outdoor 2 Phase Pipe Thermistor Outdoor Fuse T15AL250V Capacitor Electronic Expansion Valve Reactor ACL4 Reactor Connection Terminal L1 L2 L3 Power supply P B Power Circuit Board RS Rush Current ...

Page 13: ...ectrically insulated by the transformer or other device Notes 1 Wiring size must comply with the applicable local and national code 2 Power supply cords and Indoor unit Outdoor unit connecting cords shall not be lighter than polychloroprene sheathed flexible cord Design 60245 IEC 57 3 Use an earth wire which is longer than the other cords so that it will not become disconnected when tension is app...

Page 14: ...t Indoor unit outdoor unit connecting cables Remote controller Indoor unit Option Indoor unit power supply 1 A breaker with at least 3 0 mm contact separation in each pole shall be provided Use earth leakage breaker NV The breaker shall be provided to ensure disconnection of all active phase conductor of the supply 2 Max 120 m 3 The 10 m wire is attached in the remote controller accessory Max 500 ...

Page 15: ...mber of wires Polarity L m 6 Round 2 5 3 Clockwise S1 S2 S3 Pay attention to stripe of yellow and green 30 2 Flat 2 5 3 Not applicable Because center wire has no cover finish Not applicable 5 Flat 1 5 4 From left to right S1 Open S2 S3 18 3 Round 2 5 4 Clockwise S1 S2 S3 Open Connect S1 and S3 to the opposite angle 30 4 1 Power supply cords of appliances shall not be lighter than design 60245 IEC ...

Page 16: ...ots on the shield wire noise may enter into the shield wire because the earth wire and shield wire form 1 circuit and the electric potential difference occurs due to the impedance difference among earthing spots In case of single spot earthing noise does not enter into the shield wire because the earth wire and shield wire do not form 1 circuit To avoid communication errors caused by noise make su...

Page 17: ...esses are 00 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 Switch 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...

Page 18: ... heating 10 REFRIGERANT SYSTEM DIAGRAM PUHZ P200YHA PUHZ P250YHA PUHZ P200YHA3 PUHZ P250YHA3 PUHZ P200YHA3R1 PUHZ P250YHA3R1 PUHZ P200YHA3R2 PUHZ P250YHA3R2 PUHZ P200YHA3R3 PUHZ P250YHA3R3 Outdoor heat exchanger Thermistor TH3 Thermistor TH6 Thermistor TH7 Distributor Service port check Service port check Accumulator Compressor Refrigerant GAS pipe 25 4 1 inch Refrigerant LIQUID pipe P200 9 52 3 8...

Page 19: ...ter w If 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 4 Turn off the power supply circuit breaker Warning When pumping down the refrigerant stop the compressor before disconnecting the refrigerant pipes The compres sor may burst if air etc get into it 10 2 Start and finish of test ...

Page 20: ...o abnormality in electrical component controller board remote controller and etc Re check the abnormal symptom Conduct trouble shooting and ascertain the cause of the trouble according to 11 5 Troubleshooting by inferior phenomena Continue to operate unit for the time being if the cause is not ascertained There is no abnormality concerning of parts such as electrical component controller board rem...

Page 21: ...e blink alternately 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 Pr...

Page 22: ...r display turned off A 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 th...

Page 23: ...has a function that stores error codes the latest 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 Switch to self diagnosis mode Press the CHECK button twice within 3 seconds The display content will change as shown below Set the unit number or refrigerant address you want to diag...

Page 24: ... display content will change as shown below Press the FILTER button to start self diagnosis 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 blinks The remote controller s transmitting receiv ing circuit is defective...

Page 25: ...lled 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 11 3 4 Malfunction diagnosis method by wireless remote controller In case of trouble durin...

Page 26: ...s 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 PA Forced compressor stop due to water leaka...

Page 27: ... the outdoor controller circuit board Check connection of the connector CNDC on the outdoor noise filter circuit board Refer to 11 9 3 Check connection of reactor ACL4 4 a Check connection of outdoor noise filter circuit board b Replace outdoor noise filter circuit board Refer to 11 9 5 Replace controller board When items above are checked but the units cannot be repaired F5 5201 63H connector ope...

Page 28: ...nits Abnormal if the number cannot be checked automatically due to miswiring of indoor outdoor unit connect ing wire and etc after power is turned on for 4 minutes 2 Abnormal if outdoor controller circuit board recognizes excessive number of indoor units 1 Check disconnection or looseness or polar ity of indoor outdoor unit connecting wire of indoor and outdoor units 2 Check diameter and length of...

Page 29: ... minutes Abnormal if condenser evaporator temperature thermistor TH5 exceeds 40 during defrosting and discharge temperature thermistor TH4 exceeds 110 2 Abnormal if discharge superheat Cooling TH4 TH5 Heating TH4 TH6 exceeds 70 continuously for 10 minutes 1 Overheated compressor opera tion caused by shortage of refrigerant 2 Defective operation of stop valve 3 Defective thermistor 4 Defective outd...

Page 30: ...wer module 1 Check connection of connector TH3 TH7 6 on the outdoor controller circuit board Check breaking of the lead wire for thermistor TH3 TH6 TH7 Refer to 11 9 2 Check resistance value of thermistor TH3 TH6 TH7 or check temperature by microprocessor Thermistor TH3 TH6 TH7 Refer to 11 6 SW2 on A Control Service Tool Refer to 11 10 3 Replace outdoor controller circuit board 4 Replace outdoor p...

Page 31: ...ting of outdoor con troller circuit board UH 5300 Compressor current sensor error or input current error Abnormal if compressor current sensor detects 1 0A to 1 0A within 3 minutes after compressor starts operating This error is ignored in case of test run mode 1 Disconnection of compressor wiring 2 Defective circuit of current sensor on outdoor power circuit board 1 Correct the wiring U V W phase...

Page 32: ...a normally from remote controller board or from other indoor controller board for 3 minutes Error code E4 2 Indoor controller 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 wirin...

Page 33: ... if communication between outdoor controller circuit board and M NET board is not available 1 Check disconnection looseness or breaking of connection wire between outdoor controller circuit board CNMNT and M NET board CN5 2 Check disconnection looseness or breaking of connection wire between outdoor controller circuit board CNMNT and M NET board CND 3 Check M NET transmission wiring method E8 6840...

Page 34: ... MASTER LOSSNAY or remote controller 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 connected 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 waveform or no...

Page 35: ...f transmission connector CN2M of outdoor unit 3 Defective transmitting receiving 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 LOSSNAY 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 switc...

Page 36: ...ly of same refrigerant system with LOSSNAY is put off or within 2 minutes of restart abnormality is detected 3 Contact failure of transmission wire of indoor unit of LOSSNAY 4 Disconnection of transmission connector CN2M of indoor unit 5 Defective transmitting receiving circuit of indoor unit or LOSSNAY 7 If displayed address or attribute is non existent 1 The unit of former address does not exist...

Page 37: ... error Check LED3 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 4 Check LED display on outdoor controller circuit board Refer to 11 10 Check protection device connector 63H for contact failure Refer to 11 9 Error Code Abnorm...

Page 38: ...ng immediately when turning off by the remote controller 12Normal operation For protection of compressor 12Normal operation 4 Even controlled by the wireless remote controller no beep is heard and the unit does not start operating Operation display is indicated on wireless remote controller 1 The pair number settings of the wireless remote controller and indoor controller board are mismatched 1 Ch...

Page 39: ... after turning on the main power Normal The start up diagnosis will be over in around 2 minutes Miswiring 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 n...

Page 40: ... board are blown 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 ...

Page 41: ...door controller 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...

Page 42: ...tact of the remote 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 ...

Page 43: ...ear FILTER from the display See the operation manual that came with the product for how to clean the filters STANDBY is displayed on the screen 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 W...

Page 44: ...unit is controlling the airflow amount in order to keep the optimum operating condition A sound similar to water flowing is heard from the unit This is not a malfunction This is the sound which is heard when the refrigerant is flowing inside the indoor unit The fan speed does not match the setting of the remote controller in HEAT operation The up down vane will be automatically set to horizontal b...

Page 45: ...irflow direction does not change Up down vane left right louver 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 does not have that function NOT AVAILABLE will be displayed on the remote controller when AIR DIRECTION or LOUVER button is pressed Something...

Page 46: ...s down Heating 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 does not come on The indoor uni...

Page 47: ...noid valve coil Four way valve 21S4 Motor for compressor MC Linear expansion valve LEV A Normal Abnormal Open or short 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 Refer to next page Fan motor MF1 MF2 0 30 Measure the resistance between the terminals with a tester Winding tem...

Page 48: ...r CNF1 2 Fuse check 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 VDC between 1 and 4 of the fan connector VDC DC250 330V TEST POINT VCC between 5 and 4 of the fan connector VCC DC15V Recover wiring Replace outdoor controller board Replace the fan motor Replace outdoor controller b...

Page 49: ...0 3 0k Thermistor R0 15k 3 B constant 3480 2 Rt 15exp 3480 273 t 273 1 1 Thermistor R120 7 465k 2 B constant 4057 2 Rt 7 465exp 4057 273 t 393 1 1 20 253k 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 500 400 300 200 100 0 25 50 75 100 120 Temperature Resi...

Page 50: ...e is locked sound can be heard No sound is heard when the pulse number moves from B to A in case coil is burnt out or motor is locked by open phase Sound can be detected by placing the ear against the screw driver 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 circui...

Page 51: ...ipes can bend 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 wound by lead wire If the stopper is not firmly attached ...

Page 52: ...ling operation for more than 10 hours Neglecting this could result in freezing the heat exchanger in indoor unit 3 Emergency operation procedure 1 Turn the main power supply off 2 Turn on the emergency operation switch SWE on indoor controller board 3 Set the shorting pins of emergency operation connector CN31 on outdoor controller board to ON 4 Use SW4 2 on outdoor controller board to set the ope...

Page 53: ...0 50 35 5 30deg 5deg HEAT 20 5 45 50 22 5 80 5 7 5 30deg 5deg 1 1 1 1 2 2 Remarks 1 If the thermistor temperature data is normal not open short that data is loaded into the control as valid data If the unit enters emergency operation because TH values have become mismatched setting the thermistors to open short corrects the settings 2 If one thermistor is set to open short the values for each will...

Page 54: ...Outdoor 2 phase pipe CNDC Connect to the outdoor noise filter circuit board CNDC VFG TEST POINT 4 Voltage between right pins of PC5C and PC5D pin 3 and pin 4 Same as CNF17 4 VSP TEST POINT 3 Voltage between pins of C5A C5B DC 0V when stopped DC 1 6 5V when operated SW7 Demand control setting CN51 External signal output Compressor operating signal Abnormal signal LEV A Linear expansion valve SWP Pu...

Page 55: ...LI3 NI AC220 230 240V input Connect to the terminal block TB1 GD1 Connect to the earth CNAC1 CNAC2 AC220 230 240V Connect to the outdoor controller circuit board CNAC CNDC Connect to the outdoor controller circuit board CNDC LO1 LO2 LO3 POWER SUPPLY LO1 LO2 LO2 LO3 LO3 LO1 AC380 400 415V OUTPUT Connect to the outdoor power circuit board TB L1 L2 L3 CNCT Primary current Connect to the outdoor power...

Page 56: ...oise filter circuit board CNCT CN4 Connect to the outdoor con troller circuit board CN4 CN2 Connect to the outdoor controller circuit board CN2 1 5 Power circuit board Transmitting signal to the controller board 0 5V DC 2 5 Zero cross signal 0 5V DC 3 4 Not used 6 5 16V DC 7 5 16V DC 5 1 2 6 7 Note The marks L1 L2 L3 N1 N2 P1 P2 U V and W shown in the diagram are not actually printed on the board ...

Page 57: ...IP 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 DIP SW Please re...

Page 58: ... SW 1 which is procured locally between Orange and Red 1 and 3 of the adapter 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 2 Function of connectors and switches CN31 Types Connector Switch Function Effective timing Connector SW6 SW5 6 SW6 1 SW6 2 SW6 3 SW6 4 ...

Page 59: ...roller Remote controller transmitting error is detected by remote controller 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 M N...

Page 60: ...utdoor thermistors Abnormality of heatsink temperature Check if indoor outdoor units have a short cycle on their air ducts Measure resistance value of outdoor thermistor TH8 Check the outdoor fan motor Check if connector TH3 on outdoor controller board is disconnected Abnormality of voltage Check looseness disconnection and converse connection of compressor wiring Measure resistance value among te...

Page 61: ...layed while error is being postponed 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 Transmitting error Outdoor unit ...

Page 62: ...git 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 5 secs...

Page 63: ...ror 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 Thermostat ON time 0 999 Test run elapsed time 0 120 0 999 When it is 100 ...

Page 64: ...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 is 0 or less ...

Page 65: ...ture TH8 40 200 17 30 39 88 When the temperature is 0 or less and tem perature are displayed by turns 40 200 When the temperature is 0 or less and tem perature are displayed by turns When the thermistor detects 100 or more hun dreds digit tens digit and ones digit are displayed by turns Outdoor outside temperature TH7 39 88 39 88 When the temperature is 0 or less and tem perature are displayed by ...

Page 66: ...de 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 number and code When no error history 0 and are displayed by turns 3 Outdoor pipe temperature Liquid TH3 6 Outdoor pipe temperature 2 phase TH6 7 Outdoor outside temperature TH7 8 Outdoor heatsink TH8 1 ...

Page 67: ...are displayed by turns Example When 15 C 0 5 secs 0 5secs 2 secs Outdoor pipe temperature 2 phase 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 Example When...

Page 68: ...ss and temperature are displayed 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 superheat 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 ...

Page 69: ...r excessive temp erature rise of condensing temperature Frosting preventing control Preventive control for excessive temp erature rise of radiator panel Example The following controls are activated Primary current control Preventive control for excessive tempe rature rise of condensing temperature Preventive control for excessive tempe rature rise of heatsink LED 39 88 When the temperature is 0 C ...

Page 70: ... units in the same refrigerant system 12 1 UNIT 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 Table 1 Function selections 1 Functions available when setting the unit number to 00 Select 00 referring to 4 s...

Page 71: ...setting the unit number of Operating Procedure When setting functions for a simultaneous twin triple quadruple indoor unit system set the unit number to 01 to 04 for each indoor unit in case of selecting different functions for each unit referring to 4 setting the indoor unit number of Operating Procedure When setting the same functions for an entire simultaneous twin triple quadruple indoor unit ...

Page 72: ...ing Press Specified indoor unit FAN operation Change refrigerant address or unit No Switch to function setting mode Press and 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...

Page 73: ...efrigerant address and unit number may be incorrect so repeat steps and 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 performs fan operation there may be another refrigerant address that is the same as the specified one In this case check the DIP switch of the outdoor unit to see whether such a...

Page 74: ... temp button once to set 50 Direct the wireless remote controller toward the receiver of the indoor unit and press the button 3 Set the unit number Press the temp button to set the unit number Press 01 to specify the indoor unit whose unit number is 01 Direct the wireless remote controller toward the receiver of the indoor unit and press the button If a unit number that cannot be recognized by the...

Page 75: ... 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 Main The controller will be the main controller Sub The controller will be the sub controller 2 Use of clock setting To switch the setting press the ON OFF button ON The clock function can be used OFF The clock fu...

Page 76: ...isplayed 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 controller The c...

Page 77: ...and to select the desired refrigerant address Screen 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 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 automatically ...

Page 78: ... by thermostat Indoor 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 Indoo...

Page 79: ...nit Error postponement history 2 previous Outdoor unit Error postponement history 3 last but one 0 255 Refer to13 2 1 DetailContentsinRequestCode Refer to13 2 1 DetailContentsinRequestCode Refer to13 2 1 DetailContentsinRequestCode Refer to13 2 1 DetailContentsinRequestCode 0000 Not connected Examples Ver 5 01 Auxiliary information displayed after version information Examples Ver 5 01 A000 Display...

Page 80: ...ry 3 third 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 Ou...

Page 81: ...e Fan motor ON 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 Microprocessor version information Indoor unit Microprocessor version inf...

Page 82: ... display area C 4 Relay output 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 4 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 oper...

Page 83: ...SV1 Four way valve 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 Display 52C SV2 SS ON ON ON ON ON ON ON ON ON ON ON ON Error content U9 Request code 55 Data display Error content Error content 0 0 Error content Detected Display Overvoltage Undervoltage L1 phase Power synchronizing er...

Page 84: ...ay Request code 70 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 Setting information 0 0 Setting information Display Defrost mode 0 Standard 1 For high humidity Setting information Display Single 3 phase Heat pump cooling only 0 Single phase Heat pump 1 Cooling only 2 3 phase Heat pu...

Page 85: ...1 1 1 1 0 0 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 Switch OFF 1 Switch 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...

Page 86: ...A VA L 32 13 33 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 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 12 140 160 200 224 250 280 03 25 13 04 28 14 05 32 15 06 35 36 16 07 40 17 08 45 18 09 50 19 0A 56 1A 0b 63 1b 0C 71 1C ...

Page 87: ...nt to check the data with the air conditioner stopped skip to step 4 L 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 3 Press the FILTER button to confirm the setting Display Waiting for stabilization HEAT STAB...

Page 88: ...charge 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 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 controller Remot...

Page 89: ...temperature 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 intake ai...

Page 90: ...ing screws 5 25 to detach the fan motor See Photo 2 Fan motor fixing screws Photo 3 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 and power supply wire from terminal block 4 Disconnect the connectors on the controller circuit board 5 Remove the terminal cover and disconnect the compres...

Page 91: ... top of the electrical parts box See Photo 4 5 Pull out the thermistor Outdoor TH7 from the sensor older 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 5 above to remove thermistor Outdoor 2 phase pipe Photo 6 Clamp Thermistor Outdoor 2 phase pipe TH6 6 Removing the thermistor Outdoor pipe T...

Page 92: ...nel See Figure 1 3 Remove 3 valve bed fixing screws 4 10 4 ball valve and stop valve fixing screws 5 16 then remove the valve bed 4 Remove 4 right side panel fixing screws 5 12 in the rear of the unit then remove the right side panel 5 Remove the 4 way valve coil See Photo 7 6 Recover refrigerant 7 Remove the welded part of 4 way valve 9 Removing the linear expansion valve 1 Remove the service pan...

Page 93: ...d outlet and remove the compressor Note Recover refrigerant without spreading it in the air Photo 9 Compressor MC Soundproof cover Compressor fixing nut 12 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 12 and remove the front cover panel 4 Remove 2 back cover panel fixing screws 5 12 and remove the ...

Page 94: ...DITION E Distributed in Nov 2010 No OCH424 REVISED EDITION D Distributed in Jan 2010 No OCH424 REVISED EDITION C PDF 5 Distributed in Nov 2009 No OCH424 REVISED EDITION B PDF 7 Distributed in Feb 2009 No OCH424 REVISED EDITION A PDF 7 Distributed in Sep 2007 No OCH424 PDF 8 Made in Japan New publication effective Oct 2011 Specifications subject to change without notice ...

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Mitsubishi Electric Mr.Slim PUHZ-P250YHA, Service Manual

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