Mitsubishi Electric PVA-A30AA4 Service Manual Download Page 32

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12-5-2. Indoor controller board

SWE

Emergency operation

SW1

Model selection

SW2

Capacity setting

CN105 Radio frequency interface

CN32 Remote start/stop adapter

CN22 For MA remote controller cable con-

nection
(10 - 13 VDC)

CN51 Centralized control

CN41 JAMA standard HA terminal A

CN44 Thermistor

(liquid/condenser/evaporator
temperature)

CN4F Float sensor

CN20 Thermistor (Inlet temperature)

CN24-1

1st Heater control (12VDC)

CN24-2

2nd Heater control

CN4Y For fan control

CN3C Indoor-outdoor transmission

(0 - 24VDC)

CN90 Wireless remote controller

CNXA2

Connect to the indoor controller board

CNXB2

Connect to the indoor controller board

CNXC2

Connect to the indoor controller board

CNXA1

Connect to the indoor power board

CNXB1

Connect to the indoor power board

CNXC1

Connect to the indoor power board

CNER

ERV controll

CN2C

ERV input

CN25

Humidity conrol

CNF

Humidity input

CN22

CN105

CN41

CN25

CNER

CN24-1

CN32

SW1
SW2

SWE

CN51

CN2C

CN24-2

CN3C

CN90

CNF

CN4Y

CN44

CN4F

CN20

CNXB2

CNXC2

CNXA2

PVA-A30AA4
PVA-A36AA4
PVA-A42AA4

HWE1406A.qx 3/19/15 9:02 AM Page 30

Summary of Contents for PVA-A30AA4

Page 1: ...SPLIT TYPE HEAT PUMP AIR CONDITIONERS SERVICE MANUAL Model name Indoor unit Model name Indoor unit Series PVA 2015 PVA A30AA4 PVA A36AA4 PVA A42AA4 INDOOR UNIT ...

Page 2: ......

Page 3: ...N PERFORMANCE AND CORRECTED AIR FLOW 6 5 SOUND PRESSURE LEVELS 10 6 OUTLINES DIMENSIONS 12 7 WIRING DIAGRAM 14 8 REFRIGERANT SYSTEM DIAGRAM 15 9 HEATER CONTROL 16 10 HUMIDIFIER CONTROL 19 11 ERV ENERGY RECOVERY VENTILATION CONTROL 20 12 TROUBLESHOOTING 21 13 DISASSEMBLY PROCEDURE 34 ...

Page 4: ...ols are necessary to use R410A refrigerant Handle 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 tool Electronic refrigerant charging scale Vacuum pump...

Page 5: ... 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 PART NAMES AND FUNCTIONS 2 Indoor Unit Air inlet ...

Page 6: ...39 43 19 05 3 4 FPT 534 21 548 21 5 8 1378 54 1 4 64 141 Service Ref Power supply phase cycle voltage Max Fuse Size Min Circuit Ampacity A A External finish Heat exchanger Fan Fan drive No F Fan motor an motor output kW F L A Airflow Low Mid High m3 min CFM External static pressure Pa in WG Operation control Thermostat Sound pressure level Low Mid High dB A Drain pipe mm in Dimensions W mm in D mm...

Page 7: ...stat Sound pressure level Low Mid High dB A Drain pipe mm in Dimensions W mm in D mm in H mm in kg lbs INDOOR UNIT Weight 75Pa 0 30 in WG 125Pa 0 50 in WG 200Pa 0 80 in WG PVA A42AA4 1 phase 60Hz 208 230V 15 5 63 Galvanized Steel Cabinet Powder coated Slate Gray Plate fin coil Sirocco fan 1 0 430 4 50 29 4 35 7 42 0 1040 1262 1485 75 125 200 0 30 0 50 0 80 Remote controller built in 34 38 42 36 40...

Page 8: ...60 Airflow rate m3 min cfm Static pressure Pa in WG 15 530 20 706 25 883 28 989 75 0 30 100 0 40 150 0 60 125 0 50 175 0 70 200 0 80 225 0 90 Airflow rate m3 min cfm Static pressure Pa in WG 15 530 20 706 25 883 27 953 Low Low Low Middle Middle Middle High High High Low Low Low Middle Middle Middle High High High PVA A30AA4 Vertical Horizontal Right Horizontal Left Downflow External static pressur...

Page 9: ... rate m3 min cfm Static pressure Pa in WG 75 0 30 100 0 40 150 0 60 125 0 50 175 0 70 200 0 80 225 0 90 Airflow rate m3 min cfm Static pressure Pa in WG 20 706 25 883 30 1059 37 1306 35 1236 20 706 25 883 30 1059 37 1306 35 1236 20 706 25 883 30 1059 37 1306 35 1236 Low Low Low Middle Middle Middle High High High Low Low Low Middle Middle Middle High High High PVA A36AA4 Vertical Horizontal Right ...

Page 10: ...rflow rate m3 min cfm Static pressure Pa in WG 75 0 30 100 0 40 150 0 60 125 0 50 175 0 70 200 0 80 225 0 90 Airflow rate m3 min cfm Static pressure Pa in WG 26 918 30 1059 35 1236 43 1518 40 1412 26 918 30 1059 35 1236 43 1518 40 1412 26 918 30 1059 35 1236 43 1518 40 1412 Low Low Low Middle Middle Middle High High High Low Low Low Middle Middle Middle High High High PVA A42AA4 Vertical Horizonta...

Page 11: ... 0 020 10 0 040 15 0 060 20 0 080 25 0 100 Airflow rate m3 min cfm External static pressure Pa in WG 0 0 10 353 20 706 30 1059 40 1412 50 1766 PVA A30 36 42AA4 Air filter Power source 208 230V 60Hz A30 A36 42 ...

Page 12: ...10 SOUND PRESSURE LEVELS 5 5 1 Sound pressure level 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 Ceiling concealed 5 2 NC curves PVA A30AA4 PVA A36AA4 ...

Page 13: ...11 PVA A42AA4 0 1 2 0 1 2 0 1 2 ...

Page 14: ...er Air outlet Air inlet Duct Refrigerant piping brazing connection gas Refrigerant piping brazing connection liquid Primary drain pipe Gravity drain ø19 05 3 4 3 4 FPT Secondary drain pipe Emergency draining ø19 05 3 4 3 4 FPT Primary drain pipe Gravity drain ø19 05 3 4 3 4 FPT Horizontal left Horizontal Right Secondary drain pipe Emergency draining ø19 05 3 4 3 4 FPT Primary drain pipe Gravity dr...

Page 15: ...13 609 6 24 Width of Unit 609 6 24 Length of Unit Clearance Area Vertical Installation Horizontal Installation Unit mm in ...

Page 16: ...AL PARTS 4 Use copper supply wire UTILISER DES FILS D ALIMENTATION EN CUIVRE SWITCH FOR MODE SELECTION CONNECTOR HEATER CONTROL 1ST CONNECTOR RADIO FREQUENCY INTERFACE INDOOR CONTROLLER BOARD CONNECTOR WIRELESS FUSE AC250V 6 3A CONNECTOR CENTRALLY CONTROL CONNECTOR HA TERMINAL A LED REMOTE CONTROLLER SUPPLY INDOOR CONTROLLER BOARD CONNECTOR REMOTE SWITCH LED TRANSMISSION INDOOR OUTDOOR CONNECTOR L...

Page 17: ...re Liquid Distributor with strainer 50 Thermistor TH5 Cond Eva temperature Thermistor TH1 Room temperature Refrigerant flow in cooling Refrigerant flow in heating Strainer 50 Strainer 50 Heat exchanger Refrigerant GAS pipe connection Flare Refrigerant LIQUID pipe connection Flare ...

Page 18: ...1 5 C The fan will stop and the heater will turn off when DEFROST is displayed Heater OFF Inlet air temp set temp 1 8 F 1 C Heater ON Inlet air temp set temp 3 6 F 2 C The fan will stop and the heater will turn off when DEFROST is displayed 2 2 Inlet air temp set temp 1 8 F 1 C Heater ON Inlet air temp set temp 4 5 F 2 5 C The fan will stop and the heater will turn off when DEFROST is displayed 1s...

Page 19: ... ON 2 9 2 FAN CONTROL The following section describes installation of the External Heater Adapter that connects to PVA A AA4 series indoor unit This products is the special wiring parts to drive an electric heater with the air conditioner 1 Parts list Check that the following parts are included in the package 1 External output cable with a yellow connector 2 in total Two types of cables with diffe...

Page 20: ... the circuit board of the indoor unit shorter than 10 meters 32ft Longer than 10 meters 32ft could cause improper operation Use a transit relay when extending wiring such as remote wiring Recommended circuit Wiring diagram 1 phase power supply 208V 230V 60Hz Control board FS1 2 Thermal fuse H1 H2 Heater 26H Overheat protection thermostat 88H Electromagnetic contactor FS1 FS2 FS1 FS2 R S R S CN24 1...

Page 21: ...ow table shows how the field installed humidifier and fan speed is controlled Mode function No Wired remote controller RF thermostat Humidistat output Condition no defrost no error CN25 output Fan speed 13 113 16 116 CNF input 2 1 OFF Heat operation Thermo OFF OFF RC setting Heat operation Thermo ON ON Heat operation Thermo OFF OFF RC setting Heat operation Thermo ON ON High 2 OFF Heat operation T...

Page 22: ...FF STOP STOP OFF ON Cool Heat Fan operation RC setting ON Defrost STOP OFF STOP Low ON XB XF ERV ERV switch XB On site preparation Maximum cable length is 10m 32ft CNER CN2C Indoor unit control board ERV power source Use XB relay having following specifications Rated voltage 12VDC Power consumption 1W or less ERV switch Minimum applicable load 1mA at DC Contact rating voltage 15VDC or more Contact...

Page 23: ...ke care the followings during servicing 1 Before servicing the air conditioner be sure to turn off the remote controller first to stop the main unit and then turn off the breaker 2 When removing the indoor controller board hold the edge of the board with care NOT to apply stress on the components 3 When connecting or disconnecting the connectors hold the housing of the connector DO NOT pull the le...

Page 24: ... fan protection stop Compressor overcurrent interruption Abnormal of power module Abnormality of super heat due to low discharge temperature Abnormality such as overvoltage or voltage shortage and abnormal synchronous signal to main circuit Current sensor error Other errors Refer to the technical manual for the outdoor unit For details check the LED display of the outdoor controller board Output p...

Page 25: ...roller LED 3 communication between indoor and outdoor units AUTO RESTART FUNCTION Indoor controller board This model is equipped with the AUTO RESTART FUNCTION When the indoor unit is controlled with the remote controller the operation mode set temperature and the fan speed are memorized by the indoor controller board The auto restart function sets to work the moment the power has restored after p...

Page 26: ...nit does not reset normally after three minutes The unit returns to normal operation if it has normally reset 2 Constantly detected during cooling drying and heating except defrosting operation Short 90 C 194 F or more Open 40 C 40 F or less 1 Defective thermistor characteristics 2 Contact failure of connector CN44 on the indoor controller board Insert failure 3 Breaking of wire or contact failure...

Page 27: ...beyond the tolerance range 4 Defective indoor fan motor Fan motor is defective Indoor controller board is defective 5 Defective outdoor fan control 6 Overcharge of refrigerant 7 Defective refrigerant circuit clogs 8 Bypass circuit of outdoor unit is defective Cooling or drying mode 1 Check clogging of the filter 2 Remove shields 4 Refer to 12 8 DC Fan motor FAN MOTOR INDOOR CONTROLLER BOARD 5 Chec...

Page 28: ...units When it is not the above mentioned problem of 1 3 4 Diagnose remote controllers a When RC OK is displayed Remote controllers have no problem Turn the power off and on again to check If abnormality generates again replace indoor controller board b When RC NG is displayed Replace remote controller c When RC E3 is displayed d When ERC 00 06 is displayed c d Noise may be causing abnormality If t...

Page 29: ...supply 3 Noise has entered into outdoor control wire 1 3 Turn the power off and on again to check If abnormality generates again replace indoor controller board Indoor outdoor unit communication error Signal receiving error 1 Abnormal if indoor controller board cannot receive any signal normally for six minutes after turning the power on 2 Abnormal if indoor controller board cannot receive any sig...

Page 30: ...board is defective 2 LED2 on indoor controller board is blinking When LED1 on indoor controller board is also blinking Connection failure of indoor outdoor unit connecting wire When LED1 is lit 1 Mis wiring of remote controller wires Under twin triple indoor unit system 2 or more indoor units are wired together 2 Refrigerant address for outdoor unit is wrong or not set Under grouping control syste...

Page 31: ...B2 Connect to the indoor power board CNXC2 Connect to the indoor power board 1 VFG Voltage on the side of PC51 and C25 Same with the voltage between 7 and 4 of CNMF VCC Voltage between the C25 pins 15 VDC Same with the voltage between 5 and 4 of CNMF Vsp Voltage between the C53 pins 0VDC with the fan stopped 1 6 5VDC with the fan in operation Same with the voltage between 6 and 4 of CNMF CND CNXB1...

Page 32: ...rol 12VDC CN24 2 2nd Heater control CN4Y For fan control CN3C Indoor outdoor transmission 0 24VDC CN90 Wireless remote controller CNXA2 Connect to the indoor controller board CNXB2 Connect to the indoor controller board CNXC2 Connect to the indoor controller board CNXA1 Connect to the indoor power board CNXB1 Connect to the indoor power board CNXC1 Connect to the indoor power board CNER ERV contro...

Page 33: ... IC Motor winding Power device Pre driver Vm Power supply for motor Vcc Power supply for control Vsp Speed command voltage PG Pulse output for rotation GND 12 7 Thermistor 0 10 20 30 40 50 20 10 0 10 20 30 40 50 Thermistor for lower temperature Temperature Resistance K C 4 14 32 50 68 86 104 122 F Thermistor Characteristic graph Room temperature thermistor TH1 Pipe temperature thermistor TH2 Conde...

Page 34: ...pin 3 150kΩ O L 47kΩ 1MΩ PVA A30AA4 PVA A36 42AA4 143kΩ O L pin 6 pin 3 Replace indoor controller board I B Replace fan motor MF Replace indoor controller board Is the resistance of the fan motor normal Refer to below table Does the voltage between pin 6 and pin 3 of connector CNMF repeat 0V and 5V Replace the fan motor Is the voltage normal Is there no contact failure Yes Yes 1 2 Yes No No No No ...

Page 35: ...PCB J41 J42 are given in the table on the left in the table indicates the jumper line is disco nnected There is no jumper JP1 because these models have the cond eva temperature thermistor TH5 Marks in the table below Jumper wire Short Open Without TH5 With TH5 Model JP1 Factory shipment Service parts Indoor controller board type JP3 1 2 3 4 5 ON OFF Service board MODELS 1 2 3 4 5 1 2 3 4 5 PVA A30...

Page 36: ...34 1 Control box 1 Remove the Electric panel 2 screws 2 Remove the Control box cover 1 screw Fig 1 Fig 2 DISASSEMBLY PROCEDURE 13 Exercise caution when removing heavy parts ...

Page 37: ...emove the cover over the Return Air thermistor box and unplug the thermistor 4 Pull out the thermistor holder and thermistor inside the box Fig 4 Fig 3 2 Thermistor Return Air 1 Remove the Filter panel 2 thumbscrews 2 Remove the Blower panel 2 screws ...

Page 38: ... slide the coil from the frame 1 Remove the Electrical Blower and Filter panel indicated in sections 1 and 2 2 Remove the Coil panel by removing all of the screws securing it to the 3 smaller panels for refrigerant and drain lines Fig 6 Fig 7 Exercise caution when removing heavy parts 3 Coil Assembly Fig 5 Fig 8 3 Slide the smaller panels in the directions indicated and remove ...

Page 39: ...37 6 Remove lower and side drain pan Fig 9 5 Remove the plate covering the coil assembly to access the thermistors Fig 10 ...

Page 40: ...e the 1 or 2 brackets that secure the coil assembly Exercise caution when removing heavy parts Fig 11 Fig 12 3 Remove the door that covers the small enclosure attached to the fan assembly Fig 12 Unplug the motor and route the wire harness out of the enclosure 4 Remove the 2 screws that secure the fan assembly and slide out ...

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Page 44: ...http Global MitsubishiElectric com HWE1406A New publication effective Feb 2015 Specifications subject to change without notice ...

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