Mitsubishi Electric Mr.SLIM PUY-A42NHA5 Page 95 Service Manual Download

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7. Removing the 4-way valve coil (21S4),

and linear expansion valve coil (LEV-A)

(1) Remove the service panel. (See Figure 1)

(2) Remove the top panel. (See Figure 1)

[Removing the 4-way valve coil]

(3) Remove 4-way valve coil fixing screw (M4 × 6).

(4) Remove the 4-way valve coil by sliding the coil toward you.

(5) Disconnect the connector 21S4 (green) on the controller

circuit board in the electrical parts box.

[Removing the linear expansion valve coil]

(3) Remove the linear expansion valve coil by sliding the coil

upward.

(4) Disconnect the connectors, LEV-A (white), on the

controller circuit board in the electrical parts box.

8. Removing the 4-way valve

(1) Remove the service panel. (See Figure 1)

(2) Remove the top panel. (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 screw (5 × 12) in the

rear of the unit and 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.

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 4-way valve, cover it with a

wet cloth to prevent it from heating (250˚F or more),

then braze the pipes so that the inside of pipes
are not oxidized.

9. Removing linear expansion valve

(1) Remove the service panel. (See Figure 1)

(2) Remove the top panel. (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 screw (5 × 12) in the

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

(5) Remove the linear expansion valve. (See Photo 7)

(6) Recover refrigerant.

(7) Remove the welded part of linear expansion 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 linear expansion valve, cover

it with a wet cloth to prevent it from heating

(250˚F or more), then braze the pipes so that the

inside of pipes are not oxidized.

Photo 7

4-way valve

Linear expansion
valve coil (LEV-A)

Linear expansion
valve

4-way way
valve coil

4-way valve coil
fixing screw

OPERATING PROCEDURE

PHOTOS

OCH512

Summary of Contents for Mr.SLIM PUY-A42NHA5

Page 1: ...13 MONITORING THE OPERATION DATABY THE REMOTE CONTROLLER 83 14 DISASSEMBLY PROCEDURE 93 No OCH512 SPLIT TYPE HEAT PUMP AIR CONDITIONERS SPLIT TYPE AIR CONDITIONERS R410A April 2012 Model names PUZ A42NHA5 PUZ A42NHA5 BS PUY A42NHA5 PUY A42NHA5 BS Service Ref PUZ A42NHA5 PUZ A42NHA5 BS PUY A42NHA5 PUY A42NHA5 BS PUZ A42NHA5 PUY A42NHA5 Outdoor unit PARTS CATALOG OCB512 Note This manual describes on...

Page 2: ... ventilation After stopping the operation of the air conditioner turn off the power supply beaker Discharge the condenser before the work involving the electric parts Precautions during the repair service Do not perform the work involving the electric parts with wet hands Do not pour water into the electric parts Do not touch the refrigerant Do not touch the hot or cold areas in the refrigerating ...

Page 3: ... can cause deterio ration of refrigerant oil etc Do not use refrigerant other than R410A If other refrigerant R22 etc is used chlorine in refrige rant can cause deterioration of refrigerant oil etc Use a vacuum pump with a reverse flow check valve Vacuum pump oil may flow back into refrigerant cycle and that can cause deterioration of refrigerant oil etc Use the following tools specifically design...

Page 4: ...rom cylinder Check that cylinder for R410A on the market is syphon type Charging should be performed with the cylinder of syphon stood vertically Refrigerant is charged from liquid phase No Tool name Specifications 1 Gauge manifold Only for R410A Use the existing fitting specifications Use high tension side pressure of 5 3MPa G or over 2 Charge hose Only for R410A Use pressure performance of 5 09M...

Page 5: ...side diameter Dimension A 0 0 4 Unit mm inch R410A R22 1 4 3 8 1 2 5 8 3 4 6 35 9 52 12 70 15 88 19 05 17 0 43 64 22 0 7 8 26 0 1 3 64 29 0 1 9 64 17 0 22 0 24 0 27 0 36 0 Nominal dimensions inch Flare nut dimensions Outside diameter Dimension B Unit mm inch R410A R22 Gauge manifold Charge hose Gas leak detector Refrigerant recovery equipment Refrigerant cylinder Applied oil Safety charger Charge ...

Page 6: ...optimal refrigerant level regardless of the length 100ft 30m max and 16ft 5m 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 PUZ A42NHA5 PUZ A42NHA5 BS PUY A42NHA5 PUY A42NHA5 BS OC...

Page 7: ...an motor F L A 0 40 0 40 Airflow m3 min 100 CFM 3530 Sound level Cooling dB 51 Heating dB 55 Protection devices HP switch Comp shell thermo Dimension W mm 950 D mm 330 30 H mm 1350 W in 37 12 32 D in 13 1 3 16 H in 53 5 32 Weight kg 114 lbs 251 R410A Refrigerant Charged kg 4 5 lbs 10 Ether FV50S Control Linear expansion valve Oil Model Charged L 1 4 oz 45 Refrigerant Pipe size OD mm 9 52 piping Li...

Page 8: ...70 or 100 ft additional charge is required PUZ A42NHA5 Service Ref PUZ A42NHA5 BS PUY A42NHA5 PUY A42NHA5 BS Compressor model ANB33FCTMT Winding Registance U V 0 302 U W 0 302 W V 0 302 at 20 C 68 F 5 1 REFILLING REFRIGERANT CHARGE R410A oz kg 5 2 COMPRESSOR TECHNICAL DATA 5 DATA 5ft 3 3ft MICROPHONE UNIT GROUND 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8000 APPROXIMATE THRESHOLD OF...

Page 9: ... 0 82 73 4 47 5 4 9 7 6 410 120 164 118 40 21 5A 2 93 0 69 80 3 47 5 0 3 7 6 425 100 177 118 33 Discharge pressure PSIG Suction pressure PSIG Discharge temperature F Condensing temperature F Suction temperature F Ref Pipe length ft 25 25 side Indoor Intake air temperature DB 26 7 21 1 Intake air temperature WB 19 4 15 6 Discharge air temperature DB 12 9 41 9 side Outdoor Intake air temperature DB ...

Page 10: ... Pipe length m 2 83 0 82 73 4 47 5 4 9 7 6 410 120 164 118 40 Discharge pressure PSIG Suction pressure PSIG Discharge temperature F Condensing temperature F Suction temperature F Ref Pipe length ft 25 side Indoor Intake air temperature DB 26 7 Intake air temperature WB 19 4 12 9 Discharge air temperature DB side Outdoor Intake air temperature DB 35 Intake air temperature WB 23 9 side Indoor Intake...

Page 11: ...ckout Right trunking hole Knockout Conduit hole 2 27 1 1 16 Knockout 9 2 3 5 8 92 3 5 8 65 2 9 16 45 1 25 32 40 1 9 16 27 1 1 16 55 2 3 16 23 29 32 73 2 7 8 63 2 1 2 Front piping hole Knockout Front trunking hole Knockout Conduit hole 2 27 1 1 16 Knockout 9 2 3 5 8 371 14 19 32 330 13 30 1 3 16 175 6 7 8 600 23 5 8 175 6 7 8 42 1 21 32 66 2 5 8 950 37 13 32 322 12 11 16 1350 53 5 32 635 25 19 3 4 ...

Page 12: ...tion Terminal U V W Phase Diode Bridge P B TABU V W Noise Filter Circuit Board Connection Lead L1 Phase Connection Terminal Ground N F LI LO Connection Lead L2 Phase NI NO 52C Relay 52C EI E2 Controller Circuit Board Switch Pump Down Connector Emergency Operation SWP CN31 C B DS2 DS3 Power Module IPM SYMBOL LEGEND NAME SYMBOL NAME SYMBOL NAME Connection Terminal L1 L2 Phase TABS T Connection Termi...

Page 13: ...ity Maximum rating of overcurrent protective device 1 Use earth leakage breaker NV 2 Max 45 m 147 ft If AWG13 used Max 50 m 164 ft If AWG13 used and S3 separated Max 80m 262ft 3 The 10 m 30 ft wire is attached in the remote controller accessory Max 1500 ft 4 The figures are NOT always against the ground S3 terminal has DC 24 V against S2 terminal However between S3 and S1 these terminals are NOT e...

Page 14: ...r accessory Max 500 m 1500 ft 3 The figures are NOT always against the ground Notes 1 Wiring size must comply with the applicable local and national code 2 Use copper supply wires 3 Use wires rated 300V or more for the power supply cables 4 Install an earth longer than other cables Indoor unit model Indoor unit power supply Minimum circuit ampacity Maximum rating of overcurrent protective device I...

Page 15: ...e indoor outdoor connecting cables directly to the units no intermediate connections Intermediate connections can lead to communication errors if water enters the cables and causes insufficient insulation to ground or a poor electrical contact at the intermediate connection point Indoor unit Outdoor unit Indoor Outdoor separate power supply Max 120m 393ft 2 Min AWG22 Wire No Size The optional indo...

Page 16: ...re Power supply appliance M NET type outdoor unit Central remote controller Power supply appliance M NET type outdoor unit M NET type outdoor unit M NET type outdoor unit M NET transmission wire M NET type outdoor unit M NET type outdoor unit Central remote controller Power supply appliance M NET type outdoor unit M NET transmission wire M NET type outdoor unit M NET type outdoor unit Good example...

Page 17: ...resses 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 Switching 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...

Page 18: ...iner Strainer 100 Strainer 100 Strainer 100 Stop valve with service port Outdoor heat exchanger Thermistor TH3 Thermistor TH6 Distributor PUY A42NHA5 Unit mm inch PUY A42NHA5 BS Service port check Accumulator Compressor Refrigerant GAS pipe 15 88 W5 8 Refrigerant LIQUID pipe 9 52 W3 8 Service port check High pressure protect switch Thermistor TH32 Stop valve with service port Linear expansion valv...

Page 19: ...even if the unit is stopped and SW1 1 is set to ON less than three minutes after the compressor stops the refrigerant collecting operation cannot be performed Wait until compressor has been stopped for three minutes and then set SW1 1 to ON again 3 Because the unit automatically stops in about two to three minutes when the refrigerant collecting operation is completed LED1 off LED2 lit be sure to ...

Page 20: ...no abnormality concerning of parts such as 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 10 5 Troubleshooting of problems 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 cont...

Page 21: ...ely F1 After startup is displayed green once and red twice blink alternately F5 After startup is displayed green twice and red once blink alternately EA Eb EC 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 DIRECTION b...

Page 22: ... remote controller display 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 Pres...

Page 23: ...t 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 diagnose Press the TEM...

Page 24: ...ay 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 The r...

Page 25: ...led 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 10 3 4 Malfunction diagnosis method by IR wireless remote controller In case of trouble dur...

Page 26: ...ATOR lamp blinks Check code Number of times IR wireless remote controller Wired remote controller Errors detected by unit other than indoor unit outdoor unit etc Symptom Remark 1 Indoor outdoor unit communication error 2 Transmitting error Outdoor unit 3 Open short of outdoor unit thermistors 4 Compressor overcurrent interruption When compressor locked 5 Abnormal high discharging temperature insuf...

Page 27: ...y 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 10 9 3 Check connection of the connector CNDC on the outdoor controller circuit board Refer to 10 9 4 Check connection of L1 and L2 on the active filter module ACTM Refer to 10 9 5 a Check connection of...

Page 28: ...e 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 excessive number of indoor units 1 Check disconnection or looseness or polarity of indoor outdoor unit connecting wire of indoor and outdoor units 2 Check diameter and length of indoor outdoor unit connecting wire Total wiring length 80m 262...

Page 29: ... and check F5 is displayed when the power is on again When F5 is displayed refer to Judgment and action for F5 7 Check linear expansion valve Refer to 10 6 7 8 Replace outdoor controller board Case U2 TH32 1132 High comp shell temperature Abnormal if comp shell temperature thermistor TH32 exceeds 125 257 F 1 Overheated compressor opera tion caused by shortage of refrigerant 2 Defective operation o...

Page 30: ...ion of thermistors TH3 and TH6 is inoperative for 10 seconds to 10 minutes after compressor starting and 10 minutes after and during defrosting WCheck which unit has abnormality in its thermistor by switching the mode of SW2 PAC SK52ST Refer to 10 10 1 Check connection of connector TH3 TH6 TH7 on the outdoor controller circuit board Check connection of connector CN3 on the outdoor power circuit bo...

Page 31: ...wer supply voltage 3 Looseness disconnection or converse of compressor wiring connection 4 Defective compressor 5 Defective outdoor power board 6 Dip Switch setting for selecting model is incorrect on the outdoor power circuit board 1 Open stop valve 2 Check facility of power supply 3 Correct the wiring U V W phase to compressor Refer to 10 9 Outdoor power circuit board 4 Check compressor Refer to...

Page 32: ...compressor from the outdoor power circuit board and check the output voltage among phases U V W during test run No defect on board if voltage among phases U V V W and W U is same Make sure to perform the voltage check with same performing frequency E0 or E4 Remote controller transmission error E0 signal receiving error E4 1 Abnormal if main or sub remote control ler cannot receive normally any tra...

Page 33: ... 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 Indoor outdoor unit communication error Signal receiving error Outdoor unit 1 Abnormal if outdoor controller circuit board could not r...

Page 34: ...ribute displayed at remote controller indicate the con troller that detected abnormality 1 There are 2 or more same address of controller of out door unit indoor unit FRESH MASTER or LOSSNAY 2 Noise has entered into trans mission signal and signal was transformed Search the unit with same address as abnormali ty occurred If the same address is found turn off the power supply of outdoor unit and in...

Page 35: ...tion of 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 and indoor unit and FRESH MASTER or LOSSNAY at the same time for 2 minutes or more and turn the power on again If mal function was accidental the unit returns to normal 2 Check ad...

Page 36: ...me refrig erant system with LOSSNAY is turned off or within 2 min utes of restart abnormality is detected 3 Contact failure of transmis sion wire of indoor unit of LOSSNAY 4 Disconnection of transmission connector CN2M of indoor unit 5 Defective transmitting receiv ing 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: ...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 nor mal 4Check LED display on outdoor controller circuit board Refer to 10 10 Check protection device connector 63L and 63H for contact failure Refer to 10 9 Error Code Abnor...

Page 38: ...ntroller 12Normal operation For protection of compressor 12Normal operation 4 Even controlling by the IR wireless remote controller no beep is heard and the unit does not start operat ing Operation display is indicated on IR wireless remote controller 1The pair number settings of the IR wireless remote controller and indoor controller board are mismatched 1Check the pair number settings 5 When ope...

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: ...ng 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 connecting wire ...

Page 41: ...eplace 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 ...

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: ... to clear 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 l...

Page 44: ...or 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 horizonta...

Page 45: ...he airflow 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 doesn t have that function NOT AVAILABLE will be displayed on the remote controller when AIR DIRECTION or LOUVER button is pressed Someth...

Page 46: ...drips down Heating water drips down from the heat exchanger Use 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 unt Batteries are being exhausted Replace them and press the reset button of remote controller The display of IR wireless remote controller gets dim or does not come on The indoor unit ...

Page 47: ...perature 20 68 F Solenoid valve coil Four way valve 21S4 Motor for compressor MC 1 2 3 4 5 6 M Gray Orange Red Yellow Black Linear expansion valve LEV A Normal Abnormal Open or short A42 Disconnect the connector then measure the resistance with a tester Winding temperature 20 68 F Refer to next page Fan motor MF1 MF2 2350 170 A42 0 302 Measure the resistance between the terminals with a tester Win...

Page 48: ...or 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 Wiring recovery Replace outdoor controller board Replace the fan motor Replace outdoor controller...

Page 49: ...50k 30 86 F 160k 40 104 F 104k 50 122 F 70k 60 140 F 48k 70 158 F 34k 80 176 F 24k 90 194 F 17 5k 100 212 F 13 0k 110 230 F 9 8k High temperature thermistor Thermistor Shell TH32 0 10 20 30 40 50 20 10 0 10 20 30 40 50 4 14 32 50 68 86 104122 F Temperature Resistance k 500 400 300 200 100 0 25 50 75 100 120 77 122 167 212 248 F Temperature Resistance k 0 32 F 180k 25 77 F 50k 50 122 F 17k 70 158 F...

Page 50: ... sound can be heard than normal situation 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 driv er 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 D...

Page 51: ...o 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 to main body coil may be detached from the main body and that can cause defective operation of lin ear expansion valve To prevent piping stress be sure to attach the coil holding the main body of linear expansion valve firmly Otherwise pipe may bre...

Page 52: ...r 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 operation mode cooli...

Page 53: ...54 F 30 C 54 F w2 Sub cool SC 5 C 9 F 5 C 9 F w2 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 open short the values of SHd SC wil...

Page 54: ...ory record reset refrigerant address CNDM 1 to 2 Input of low level sound priority mode 1 to 3 Input of external con tact point TH3 Thermistor Outdoor pipe TH7 6 Thermistor Outdoor 2 phase pipe CNDC 280V DC 1 3 Outdoor power circuit board 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 ...

Page 55: ...lock TB1 E2 Connect to the earth LO NO Voltage of 208 230V AC is output Connect to the outdoor power circuit board TABS TABT RS1 CN52C 52C driving signal Connect to the outdoor controller circuit board CN52C CN5 Primary current Connect to the outdoor power circuit board CN5 Outdoor noise filter circuit board PUZ A42NHA5 PUZ A42NHA5 BS PUY A42NHA5 PUY A42NHA5 BS OCH512 ...

Page 56: ... filter circuit board CN5 CNDC 280 380V DC 1 3 Connect to the outdoor controller circuit board TABS TABT Connect to the outdoor noise fil ter circuit board Voltage among phases 208 230V 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 ...

Page 57: ...he unit is in trouble and Io open less than 1 1 The unit does not operate can not be switched ON and L2 short 100k 1M 1 The breaker operates open W1 1 The unit does not operate can not be switched ON 2 U9 Abnormal stop W2 P and L2 short 100k 1M 1 The breaker operates open W1 1 The unit does not operate can not be switched ON 2 U9 Abnormal stop W2 P and Io short 100k 1M 1 The breaker operates open ...

Page 58: ...5 6 ON 1 2 3 4 5 6 ON 1 2 3 4 5 6 ON 1 2 3 12 13 14 15 4 5 6 ON 1 2 3 4 5 6 ON 1 2 3 4 5 6 ON 1 2 3 4 5 6 ON w1 Forced defrost should be done as follows 1 Change the DIP SW1 1 on the outdoor controller board from OFF to ON 2 Forced defrost will start by the above operation 1 if all these conditions written below are satisfied Heat mode setting 10 minutes have passed since compressor started operat...

Page 59: ...W5 6 reference 6 1 2 3 4 5 6 OFF ON PUZ A42NHA5 1 2 3 4 5 6 OFF ON PUY A42NHA5 7 8 7 8 1 2 3 4 5 6 OFF ON 1 2 3 4 5 6 OFF ON MODEL SW6 SW5 5 6 MODEL SW6 SW5 5 6 The black square indicates a switch position 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 control...

Page 60: ...ease Low level sound priority mode and normal operation b Demand control Local wiring Demand control is available by external input In this mode power consumption is decreased within the range of usual 0 100 How to wire Basically the wiring is the same as a Connect an SW1 which is procured at field to the between Orange and Red 1 and 3 of the Adaptor for external signal input PAC SC36NA and insula...

Page 61: ...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 NET system 1 Error code displayed on remote c...

Page 62: ...istors Abnormality of heatsink temperature Check if indoor outdoor units have a short cycle on their air ducts Measure resistance value of outdoor heatsink thermistor TH8 Check the outdoor fan motor Abnormality of voltage Check looseness disconnection and converse connection of compressor wiring Measure resistance value among terminals on compressor using a tester Check the continuity of contactor...

Page 63: ...evice Postponement code is displayed 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 T...

Page 64: ...re hundreds 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 ...

Page 65: ...er and code 37 327 3 164 When the temperature is 100 F or more the hundreds digit tens digit and ones digit are displayed by turns Example When 130 F 0 5 secs 0 5secs 2 secs F A Code display Code display 0 50 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 66: ...le 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 38 190 38 190 39 88 When the temperature is 0 F or less and temperature are displayed by turns F 38 190 39 88 When the temperature is 0 F or les...

Page 67: ...anation 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 62 86 Outdoor pipe temperature 2 phase pipe TH6 38 190 Outdoor heatsink temperature TH8 40 327 F F F 38 190 39 88 When the temperature is 0 F or less and temperature are displayed by turns 40 327 40 164 When the temperature is 0 F or less and temperature are displayed by turns When the thermistor detec...

Page 68: ...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 69: ...re displayed by turns Example When 15 F 0 5 secs 0 5 secs 2 secs Outdoor pipe temperature 2 phase TH6 on error occurring 38 190 38 190 39 88 C When the temperature is 0 F or less and temperature are displayed by turns Example When 15 F 0 5 secs 0 5 secs 2 secs Outdoor outside temperature TH7 on error occurring 38 190 38 190 39 88 C When the temperature is 0 F or less and temperature are displayed ...

Page 70: ... minutes 0 5 secs 0 5 secs 2 secs 50 1 1 ON 2 3 4 5 6 Discharge superheat on error occurring SHd 32 360 Cooling TH32 TH6 Heating TH32 TH5 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 F Minute 15 1 15 4 1 ON 2 3 4 5 6 Normal Overvoltage error Undervoltage error Input current sensor error L1 or L2 phase open error Abnormal power synchronous signal PFC ACTM error Undervoltage Display examples for multiple errors Ov...

Page 71: ...he ones digit In this digit the total number of activated control is displayed Preventive control for excessive temperature rise of discharge temperature Preventive control for excessive temperature rise of condensing temperature Frosting preventing control Preventive control for excessive temperature rise of heatsink Example The following controls are activated Primary current control Preventive ...

Page 72: ...o 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 check the setting Display Waiting for stabilization HEAT STABLE MOD...

Page 73: ...e 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 Waiting for response Flashing 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 74: ... exchanger temperature Indoor intake air temperature Cool Classification Item Result Inspection Temperature difference Heat Inspection Temperature difference Stable Unstable F F Stable Unstable F F Fixed Hz operation may not be possible under the following tempera ture ranges A In cool mode outdoor intake air temperature is 104 For higher or indoor intake air temperature is 73 F or lower B In heat...

Page 75: ...2 03 103 04 104 15 115 16 116 17 117 The setting is applied to all the 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 1 Functions available when setting the un...

Page 76: ...tat is OFF Stop 2 Detection of abnormality of Detect 28 128 1 the pipe temperature P8 Neglect 2 PLA BA Not available Swing Available Wave air flow Available Not available PLA BA Wired remote controller RF thermistor 2 Functions available when setting the unit number to 01 03 or AL 07 in case of IR wireless remote controller When setting functions for an indoor unit in an independent system set the...

Page 77: ...tting Press Specified indoor unit FAN operation Change refrigerant address or unit No Switch to function setting mode Press and at the same time with stop the remote controller 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 78: ...d blinks in the unit number display area and the refrigerant address display area also blinks there are no units that corre spond to the selected unit number In this case the refrigerant 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 t...

Page 79: ...rect the IR 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 IR wireless remote controller toward the receiver of the indoor unit and press the button If a unit number that cannot be recognized by the unit is entered 3 beeps...

Page 80: ...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 function cannot be used 3 Timer f...

Page 81: ...lected 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 clock function can be used Initial sett...

Page 82: ...SELECT blinks 2 Press the button F blinks 3 Press the button C blinks 4 Press the set button with something sharp at the end MODEL SELECT is lighted for 3 seconds then turned off AUTO START ON OFF TEMP FAN VANE TEST RUN AUTO STOP AUTO START h min LOUVER MODE CHECK RESET SET CLOCK MODEL SELECT NOT AVAILABLE SWING CHECK FAN TEST RUN F C AMPM STOP START AMPM COOL DRY AUTO FAN HEAT OCH512 ...

Page 83: ...ns 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 automatical...

Page 84: ...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 pipe temperature Uni...

Page 85: ...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 86: ...econd to last Error history 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 temper...

Page 87: ...me 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 in...

Page 88: ...ay 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 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 operati...

Page 89: ... 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 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 Error content 0 0 Error content Detected Display Overvoltage Undervoltage L1 phase Power...

Page 90: ...etting display Request code 70 Data display Capacity 10 18 9 12 11 24 14 30 20 36 25 42 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 Heat pump 3 phase cooling only 0 Single phase Heat pump 1 Cooling only 2 3 phase Heat pump 3 Coolin...

Page 91: ... 1 0 0 0 0 1 0 1 0 0 0 1 1 1 0 0 0 1 0 0 1 0 0 1 1 0 1 0 0 1 0 1 1 0 0 1 1 1 1 0 0 1 0 0 0 1 0 1 1 0 0 1 0 1 0 1 0 1 0 1 1 1 0 1 0 1 0 0 1 1 0 1 1 0 1 1 0 1 0 1 1 1 0 1 1 1 1 1 0 1 0 0 0 0 1 1 1 0 0 0 1 1 0 1 0 0 1 1 1 1 0 0 1 1 0 0 1 0 1 1 1 0 1 0 1 1 0 1 1 0 1 1 1 1 1 0 1 1 0 0 0 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...

Page 92: ...b 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 10 42 01 11 02 12 03 13 04 14 05 15 06 12 16 07 17 08 18 09 18 19 0A 1A 0b 24 1b 0C 1C 0d 30 1d 0E 1E 0F 36 1F Display Pair No setting state 00 No 0 01 No 1 J41 disconnected 02 No 2 J42 disconnected 03 No...

Page 93: ... wire from terminal block 4 Remove all the following connectors from controller circuit board fan motor linear expansion valve thermistor Outdoor pipe thermistor Shell thermistor Outdoor 2 phase pipe thermistor Outdoor high pressure switch 4 way valve coil Pull out the disconnected wire from the electrical parts box Diagram symbol in the connector housing Fan motor CNF1 CNF2 Linear expansion valve...

Page 94: ...hite and TH32 black on the controller circuit board in the electrical parts box 3 Loosen the clamp for the lead wire in the rear of the electrical parts box See Photo 4 4 Pull out the thermistor Outdoor pipe TH3 and thermistor Shell TH32 from the sensor holder Electrical parts box Photo 5 Thermistor Shell TH32 Thermistor Outdoor pipe TH3 Compressor MC Lead wire of thermistor Outdoor TH7 Sensor hol...

Page 95: ...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 250 F or more then braze the pipes so that the inside of pipes are not oxidized 9 Removing linear expansion valve 1 Remove the service panel See Figure 1 2 Remove the top panel Se...

Page 96: ...re 1 2 Remove the top panel See Figure 1 3 Remove 3 right side panel fixing screws 5 12 in the rear of the unit and remove the right side panel 4 Pull out the lead wire of high pressure switch 5 Recover refrigerant 6 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 remov ing the right side pane...

Page 97: ...ote 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 12 and remove the front cover panel See Photo 3 4 Remove 2 back cover panel fixing screws 5 12 and remove the back cover panel 5 Remove the electrical parts box See Photo 3 6 Remove 3 valve bed f...

Page 98: ...7 3 MARUNOUCHI CHIYODA KU TOKYO 100 8310 JAPAN CCopyright 2012 MITSUBISHI ELECTRIC CORPORATION Distributed in Apr 2012 No OCH512 Made in Japan New publication effective Apr 2012 Specifications are subject to change without notice ...

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Mitsubishi Electric Mr.SLIM PUY-A42NHA5, Service Manual

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