Manuals / Mitsubishi Electronics / Household Appliance / Air Conditioner

Mitsubishi Electronics PURY-P400, P500YMF-C Dry operation, Thermostat on Inlet temp ˚C

Models: PURY-P400 P500YMF-C

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(6) Dry operation

1.Indoor unit fan stop

2.Inverter output 0Hz

3.Indoor unit LEV, oil return LEV closed

4.Solenoid valve OFF

5.Outdoor unit fan stop

6.BC controller solenoid valve OFF

7.BC controller LEV fully closed

Dry operations

				Normal operations
				Normal operations
				Thermostat ON
4-way valve OFF				Thermostat ON
4-way valve OFF
				Stop
				Stop
		YES
Test run start		YES
Test run start			Note : 2
			Note : 2

			Thermostat ON
	NO
	NO

Inlet temp. 18˚C

YES

Note : 1

1.Outdoor unit (Compressor) intermit- tent operations

2.Indoor unit fan intermittent opera- tionsYES

(Synchronized with compressor : low speed, OFF operations)

Note : 1	When indoor unit inlet temperature exceeds 18˚C, outdoor unit (compressor) and indoor unit fan start intermittent operations
	synchronously. Operations of outdoor unit, BC controller, indoor unit LEV and solenoid valve accompanying compressor are
	the same as those in cooling operations.

Note : 2	Thermostat is always kept on in test run, and indoor and outdoor unit intermittent operation (ON) time is a little longer than
	normal operations.

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Page 57

Image 57

Mitsubishi Electronics PURY-P400 Dry operation, Thermostat on Inlet temp ˚C, Same as those in cooling operations

Contents

Service Handbook Page Contents Carefully read the labels affixed to the main unit Safety precautionsDo not use the existing refrigerant piping Be especially careful when managing the toolsUse liquid refrigerant to seal the system Use a vacuum pump with a reverse flow check valveStorage of Piping Material Reason Piping MachiningBrazing When non-oxide brazing was usedItems to be strictly observed ReasonsAirtightness Test VacuumingR22 leakage detector Dryer Charging of RefrigerantCylinder color identification R407C-Gray R410A-PinkAppearance of Components Outdoor unit PURY-P400·500YMF-CP400 Type P500 Type Controller Box 51C2 Module IPM BoardNoise filter Magnetic contactor 52C1 Capacitor C2, C3 52F Puhy / Pury Main boardINV board Board Fancon boardCnpow Cnfan CNFC2 CNE CNDC1SNB board Board Cntr BC controllerSW4 SW5 SW2 SW1 EarthRelay 10 board Relay 4 board SV8 SV7 ACCLEV3 SVM2 CMB-P108, 1010, 1013, 1016V-FAPS3 LEV1 SVM1LEV3a TH25TH22 PURY-P400·500YMF-C Electrical Wiring DiagramSV7B SV7A SV7C SV8B SV8A SV8C CMB-P108·1010V-FACMB-P1013·1016V-FA SymbolLEV3 CMB-P108V-FBCooling operation Standard Operation DataPURY-P400YMF-C PURY-P500YMF-C DB/WBHeating operation Function of Dip SW and Rotary SW Ture Power is on Defrosting end temperaSWU SW3Indoor unit DIP SW1 SW2 settingP40 P50 P63 Model P71 P80 P100 P125 P140220V 240V SW4Function Before Test Run Check points before test runConnected indoor units Can be connected without a RP Local remote controller displays code No Check points for test run when mounting optionsBuilt-in optional parts Insulation pipeCheck points for system structure PortionNot heat at heating CN40 on the Main board when the system is centralized Error stop, compressor troubleTurn on power source 12 hours before starting operations? Example, 200m or less total length 500m at the farthestWarm or cold air is blowing out Test Run MethodFilter + Switch functionControlled Test RUNDescription of registration/deletion/retrieval Attribute display of unitGroup registration of indoor unit Registration procedurePress the switch for confirmation E Operation procedureSwitch G for the interlocked setting mode. See figure below No registrationDeletion completed Case of group re Press the switch for confirmation F twice continuouslyDeletion of address not existing Initial processing Control of Outdoor Unit 1- 1 PURY-P400·500 YMF-CControl at staring Compressor capacity controlSV6a Bypass capacity controlStop OFFSV1 Defrosting control Oil return control Electronic expansion valve SlevJudgement and control of refrigerant amount Control of liquid level detecting heaterHeat exchanger TH9 Four-way valveAccumulator CS circuit Outdoor unit heat exchanger capacity controlControl at initial starting Start of initial operation mode StepInitial start control timing chart End of initial operation mode 5 minutes ExampleExample Minutes 400 500 No Compressor Failure 48 % 65 % Emergency response operating modeControl of SVA, SVB and SVC Control of BC ControllerControl of SVM1 only FA type Control of LEVOperation Flow Chart Outdoor unitNormal operations Trouble observed Stop BC controller Operation No commandStart Normal operationsIndoor unit Normal operations Test run Stop Cooling operationCooling operation Way valve OFF Indoor unit fan Operations Test run start Thermostat onNormal operations Defrosting operations Stop Test run Heating operationThermostat on Dry operationThermostat on Inlet temp ˚C Same as those in cooling operationsList of Major Component Functions MC1MC2 TH4 TH3TH5 TH6CH3 CH2Resistance of Temperature Sensor Adjustment and Judgement of Refrigerant Amount Operating Characteristics and Refrigerant AmountLow temperature than overload Control system Temperature SymptomRefrigerant Volume Additional Refrigerant Charge VolumePURY-P400YMF-C PURY-P500YMF-C Procedure Refrigerant Volume Adjustment Mode OperationTH1 SC11 SC16Adjustment starts Turn all of switches Readjust YESSW1 OFF 18 kg 27 kg 31 kg Pipe Length Or less 60 ~ 90 mPrincipal Parts Connector GND Black Vout White Vcc DC5V RedPressure Sensor Judging FailureSW1 Solenoid Valve SV1~8LED SV3 SV4 SV5 SV6Solenoid Valves Block1 SV8 CV7b Solenoid Valves BlockCV5b CV4bCheck Valves Block1 Check Valves Block2 CV5b CV4b CV2b CV3bCheck Valves Block2 CV6bLEV Valve Closing and Valve Opening Operations Outdoor LEVTemperature is considerably low Temperature sensed by Thermistor liquid pipe temperatureCompared to the remote control’s Intake temperature display, it canPart a Diode stack Intelligent Power Module IPMTester ⊕ 10~50 Ω TesterAfter checking , if these are factors Check method and handlingCheck voltage between a and B NET transmission line break on the side of the room unitPower terminal block Voltage Verify the power Unit is removed PhenomenaMain board ----CNS1, CNVCC3 INV board----CNAC2, CNVCC1, CNL230V Check Procedure Case of M-NET remote controllerNo powering signal INV board CNS1, CNVCC3Checking method & countermeasure Case Melans is not used Transmission line Wiring miss Door unit M-NET 17 ~ 30V?Normal in case of 10V ~ MelansCNR, CNAC2 Investigation of transmission wave shape/noise Method ForwiringChecking EarthingIf the problem is solved and you connect Disconnected wires should Insulation resistance 2MΩ or moreAgain, replace the compressor Vidual Parts Failure Judgment MethodsTB1B~CNPOW, CNFAN~CN04~CNMF TB1A~NF~TB1B~CNTR1~T01~CNTRCNFAN~52F~CN05~CNMF CNFC1~CNFC2IPM 20~60Ω AC Current sensor Acct A1-A2Black Capacitor C2,C3 Board Red Motor Compressor Red White BlackPressure sensor Pressure sensor troubleshooting flow Troubleshooting the major components of the BC controllerStart OK?HPS Problem No abnormality Temperature Sensor Thermistor troubleshooting flowTemperature sensor resistance graph Temperature ˚CResistance value Thermistor R o=15 k Ω Rt=15exp 273+t LEV, Solenoid Valve Troubleshooting Flow LEV Subcool Solenoid Valve Troubleshooting Flow Output superheat BC controllerIntermediate subcool BC controller liquid Solenoid Valve Disconnect the connector before measurement SVM is turned on and off in accordance with operation modeSVM1 Normal MalfunctionBC Controller Disassembly Procedure Service panelControl Box Be careful when removing heavy parts Procedure Thermistor Liquid and gas piping temperature detection100 Ler panel TH11 TH12 CN10 TH15, TH16 CN11LEV 101Solenoid Valve Coil LEV3 LEV1102 103 Mechanical CNRS2 CNRS3CNAC2 TB1B 105 106 LEV3 SVM BCSVM1 LEV3 LEV3 SVM SVA BC 107108 LEV3 SVMSVA SV3~8 Slev 109Once vacuum operation protection is 110Indoor and outdoor units by oper 2502 Drain pump111 TB1A~NF~TB1B~CNTR1~F3~T01~CNTR 112 VDCTB1A~NF~TB1B, TB1B~DS~52C MF1~CNFAN 113114 TH HS 115Thhs TH5 TH8116 CNDR2-CNDR1IPM-MC1 117 On, the wave shape is changed and the error is detected Error118 Communication/system119 Checking method and processing ErrorTransmission circuit bus-busy er → Noise if existed, check the noise120 Communication trouble between Faulty generating controllerRemote No reply Faulty transmission wiring at IC unit side Shut down OC unit power source,Generating Display Detecting More, and make them again122 123 124 125 System error126 LED Monitor Display How to read LED for service monitor127 CompLD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 128Comp COMP1 TH2 TH3 TH4 TH5 TH6 TH7129 130 LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 131132 IC16SC 133134 135 136 137 IC24SH 138IC24SC 139140 141 SC16 LED monitor switch Location of leaks Outdoor unit Cooling modeStop all indoor units and the compressor Check that all indoor units have been stoppedLocation of leaks Outdoor unit when heating 144 LPS 145Service Handbook PURY-P400, P500YMF-C

(6) Dry operation

Normal operations

Thermostat ON

Stop

Thermostat ON

Inlet temp. 18˚C

the same as those in cooling operations.

normal operations.