Mitsubishi Electric PUH-P10MYA, Technical & Service Manual

Page 1: ...TECHNICAL SERVICE MANUAL HEAT PUMP PUH P8MYA PUH P10MYA Single and Twin Triple Four Models AIR COOLED SPLIT TYPE PACKAGED AIR CONDITIONERS Outdoor unit 2003 For use with the R407C ...

Page 2: ...n Data 13 2 Cooling Capacity Curves 14 3 Heating Capacity Curves 14 4 Capacity Reduction Ratio due to Changes in Piping Length 15 5 Center of Gravity Outdoor unit 16 6 NC Curve Outdoor unit 17 6 SERVICE DATA 18 1 Appearance of Equipment 18 2 Refrigerant Circuit 20 3 Limitation of Refrigerant Piping Length 20 4 Refrigerant Piping 21 5 Refrigerant Charge 21 6 Operation Rage 21 7 CONTROL 22 1 Composi...

Page 3: ... of the refrigerant in the cylinder will change and performance may drop Do not use a refrigerant other than R407C If another refrigerant R22 etc is used the chlorine in the refrigerant may cause the refrigerator oil to de teriorate Use a vacuum pump with a reverse flow check valve The vacuum pump oil may flow back into the refriger ant cycle and cause the refrigerator oil to deteriorate Do not us...

Page 4: ... Both ends of the pipes should be sealed until immediately before brazing Wrap elbows and T s in plastic bags for storage The new refrigerator oil is 10 times more hygroscopic than the conventional refrigerator oil such as Suniso Water infiltration in the refrigerant circuit may deteriorate the oil or cause a compressor failure Piping materials must be stored with more care than with the conventio...

Page 5: ...ons Use only the necessary minimum quantity of oil Reason 1 The refrigerator oil used for the equipment is highly hygroscopic and may introduce water inside Notes Introducing a great quantity of mineral oil into the refrigerant circuit may also cause a compressor failure Do not use oils other than ester oil ether oil or alkylbenzene ...

Page 6: ...elt on upper part of cylinder Vacuum pump Vacuum drying Current product Can be used by attach ing an adapter with a check valve Vacuum pump with a check valve Current product Flare tool Flaring of pipes Current product Bender Bending of pipes Current product Application oil Applied to flared parts Current product Ester oil or Ether oil or Alkybenzene Small amount Torque wrench Tightening of flare ...

Page 7: ...o flux when brazing between copper pipes or between a copper pipe and copper coupling 4 If installed refrigerant pipes are not immediately connected to the equipment then braze and seal both ends of them Reasons 1 The new refrigerant oil is 10 times more hygroscopic than the conventional oil The probability of a machine failure if water infiltrates is higher than with conventional refrigerant oil ...

Page 8: ...e refrigerant circuit when the vacuum pump power is turned off power failure It is also possible to attach a check valve to the actual vacuum pump afterwards 2 Standard degree of vacuum for the vacuum pump Use a pump which reaches 0 5 Torr 500 MICRON or below after 5 minutes of operation In addition be sure to use a vacuum pump that has been properly maintained and oiled using the specified oil If...

Page 9: ...407C is a mixture of 3 refrigerants each with a different evaporation temperature Therefore if the equipment is charged with R407C gas then the refrigerant whose evaporation temperature is closest to the outside temperature is charged first while the rest of refrigerants remain in the cylinder Note In the case of a cylinder with a syphon liquid R407C is charged without turning the cylinder up side...

Page 10: ...er input kW Current A Type x Quantity Fan Airflow rate m3 min Motor output kW Type Compressor Motor output kW Crankcase heater kW Refrigerant Lubricant External finish External dimension mm High pressure protection MPa Compressor Fan Refrigerant piping diameter Liquid Gas mm Indoor unit Noise level dB A Net weight kg Operating temperature range Notes 1 Cooling Heating capacity indicates the maximu...

Page 11: ... kW Current A Type x Quantity Fan Airflow rate m3 min Motor output kW Type Compressor Motor output kW Crankcase heater kW Refrigerant Lubricant External finish External dimension mm High pressure protection MPa Compressor Fan Refrigerant piping diameter Liquid Gas mm Indoor unit Noise level dB A Net weight kg Operating temperature range Notes 1 Cooling Heating capacity indicates the maximum value ...

Page 12: ...side hole for the control wiring Knockout hole Left piping hole Knockout hole Front piping hole Knockout hole Pressure gauge for option Knockout hole Rear piping hole It is necessary for the option Connecting pipe 8 φ25 4 brazed 10 φ28 6 brazed Note 1 Note 2 Note 3 Knockout hole Bottom piping hole Cross section X X Cross section Y Y X X Y Y Air outlet Air inlet Air inlet Accessory Refrigerant conn...

Page 13: ... 52C MAGNETIC CONTACTOR COMPRESSOR 63L PRESSURE SWITCH LOW PRESSURE 63H1 PRESSURE SWITCH HIGH PRESSURE 63H2 PRESSURE SWITCH FOR CONTROL MC COMPRESSOR MOTOR MF FAN MOTOR OUTDOOR TR TRANSFORMER X1 AUXILIARY RELAY FOR 16 20HP LED 1 LED FOR SERVICE XO1 X05 AUXILIARY RELAY MAIN BOARD CN2 CN20 28 CN3 34 30 3N 3S CN4 40 51 53 81 CONNECTOR MAIN BOARD CNFC1 FG S3 CNMT VMNT Symbol Name SW1 SW5 SWITCH MAIN B...

Page 14: ...ations of 8 10HP PUH P8MYA P10MYA 2 System Indoor units Distributor Remote controller Outdoor unit Pipe work Transmission line 3 core cable Distributor Remote controller Outdoor unit Pipe work Transmission line 3 core cable Indoor unit Remote controller Outdoor unit Pipe work Transmission line 3 core cable Indoor units Twin Triple Single Single 8HP 10HP 50 50 4HP 4HP 5HP 5HP SDD 50WSA E 33 33 33 2...

Page 15: ... Electrical characteristics 380 400 415 380 400 415 50 50 50 50 50 50 27 19 27 19 27 19 20 20 20 35 35 35 7 6 7 6 7 6 7 5 7 5 7 5 7 5 7 5 7 5 7 4 7 4 7 4 7 4 7 4 7 4 16 0 16 0 16 0 15 4 15 4 15 4 9 02 9 02 9 02 8 62 8 62 8 62 14 9 14 9 14 9 14 3 14 3 14 3 1 1 1 1 1 1 1 1 1 1 1 1 1 64 1 64 1 64 1 64 1 64 1 64 0 94 0 94 0 94 0 94 0 94 0 94 2 22 2 22 2 22 1 75 1 75 1 75 0 50 0 50 0 50 0 38 0 38 0 38 ...

Page 16: ...39 41 43 45 22 20 18 16 0 7 0 9 1 1 1 22 Input ratio 12 10 8 6 4 2 0 2 4 6 8 10 12 14 16 18 15 20 25 0 6 0 8 1 1 2 1 4 Capacity ratio 12 10 8 6 4 2 0 2 4 6 8 10 12 14 16 18 25 20 15 0 6 0 8 1 1 2 1 4 Input ratio Indoor inlet air wet bulb temp CWB inlet air wet bulb tem p CW B Indoor Indoor inlet air dry bulb temp CDB Indoor inlet air dry bulb temp CDB Outdoor air temperature CWB Outdoor air temper...

Page 17: ... length m Actual piping length m 0 47 Number of bend PUH P10MYA Equivalent piping length m Actual piping length m 0 5 Number of bend 6 1 0 4 0 98 2 0 88 0 0 85 2 0 86 4 0 89 6 0 92 8 0 92 10 0 92 4 Reduction ratio by frosting Outdoor unit inlet wet bulb temperature Heating capacity reduction ratio CWB Capacity ratio Equivalent piping length m 0 10 20 30 40 50 60 70 0 8 0 9 1 PUH P8MYA Capacity rat...

Page 18: ...tdoor air temperature CWB 27 15 Indoor air temperature CDB Additional refrigerant charge 0 026 L 0 014 a b c d 1 7 amount of indoor units kg 0 026 L 0 014 a b c d 1 7 amount of indoor units kg Amount of infusion of coolant at ex factory R407C 6 0 kg R407C 6 5 kg L Main section actual length a b c d Join section actual length The value of calculation result at the second decimal place must be round...

Page 19: ...e durable against unit weight For the lifting of unit for movement please be sure to suspend at four points and not to give any shock to unit Never apply two point lifting as it is dangerous Use pads properly to prevent the scratching of external panel caused by contact with sling Fasten here properly to prevent unit from slipping off from the sling at lifting Lift unit slowly by suspending rope u...

Page 20: ...1m 1m A B NC60 NC50 NC40 NC30 NC20 Approximate minimum audible limit on continuous noise 70 60 50 40 30 20 63 125 250 500 1000 2000 4000 8000 10 OCTAVE BAND CENTER FREQUENCIES Hz NC60 NC50 NC40 NC30 NC20 70 60 50 40 30 20 63 125 250 500 1000 2000 4000 8000 10 OCTAVE BAND CENTER FREQUENCIES Hz Approximate minimum audible limit on continuous noise 6 NC Curve Outdoor unit 1 Octave Band Analysis 1 PUH...

Page 21: ... control wiring connection F C BOARD N F BOARD Overcurrent relay 51C Magnetic contactor for compressor 52C Transformer Terminal block for defrosting signal Relay for defrosting signal receiving X1 PUH P8MYA P10MYA with cover removed Outdoor unit heat exchanger Compressor Electrical parts box Ball valve for refrigerant piping connection Liquid side Flare Ball valve for refrigerant piping connection...

Page 22: ...hermistor Condenser evaporator temp TH3 At the back of the heat exchanger panel header cover When this screw is removed the header cover is removed Thermistor Liquid temp TH1 4 way valve Pressure switch 63H2 Pressure switch 63H1 Solenoid valve SV1 Pressure switch 63L Check joint low pressure Check joint high pressure ...

Page 23: ... Indoor units Strainer H h L a b c d H h L a b c H h L a b H L 2 Refrigerant Circuit Flare connection Flange connection Brazing connection Cooling operation Heating operation 3 Limitation of Refrigerant Piping Length PUH P8 10 PUH P8 10 PUH P8 10 L 50 m H 40 m L a b 70 m L a L b 50 m a b 8 m H 40 m h 1 m L a b c 70 m L a L b L c 50 m a b b c c a 8 m H 40 m h 1 m L a b c d 70 m L a L b L c L d 50 m...

Page 24: ...relay Magnetic contractor 4 way valve LEV solenoid valve crankcase heater Key input LCD Send receive Louver Vane Drain pump Others Communication circuit Communication circuit Transformer Fan control Fan control Compressor Outdoor fan Indoor fan Indoor outdoor connection terminal block Indoor outdoor connection terminal block Current detection Supply power Power Indoor outdoor units communication L...

Page 25: ...g within 3 minutes 3 The 4 way valve is always ON during heating except during defrosting In other modes it is OFF However when the operation mode was changed from heating to stop the 4 way valve is turned off 10 minutes after the compres sor was stopped 4 While the compressor is stopped the crankcase heater remains ON OFF while the compressor is operating 5 When the operation mode is changed whil...

Page 26: ...g to cooling the fan step conforms to item 2 e Two minutes after the fan is started the fan step number of units is controlled every 30 seconds based on the piping temperature TH1 f When TH1 reaches 50 C or higher or when the control high pressure switch 63H2 tripped the fan output becomes 100 g Fan output while the compressor is operating is within the 20 to 100 range FAN step The following expre...

Page 27: ...egrated compressor operation time has exceeded T1 initial setting 50 minutes and the piping temperature TH1 is below 10 C b When the integrated compressor C Piping differential temperature TH1 TH10 TH1 2 The defrosting prohibit time T1 is set as following based on the defrosting time T2 Note T1 is reset at the end of defrosting or by cooling ON command Note When the compressor was stopped during d...

Page 28: ...5 C or higher then the solenoid valve turns ON for 2 minutes c When the power is turned on or when the compressor restarted after it has been stopped for 30 minutes or longer the solenoid valve turns ON for 5 minutes if the liquid temperature TH1 is staying below 25 C d The item b or c is applied to the mode change from heating to cooling e When the previous operation mode is cooling and the compr...

Page 29: ...de switching Inlet temp re reading 3 phase power source detection Cooling only switching Model setting Remarks Function None Night mode Defrosting end switching Defrosting prohibit time switching None Switch effec tive timing stopped stopped stopped Switch SW1 When CN33 shorted mode switching Operation by switch operation ON OFF Night mode Normal mode Fixed Training Kind of switch DIP SW Pole 1 2 ...

Page 30: ...lay output PUH P8MYA P10MYA Display Check contents at power on E8 Indoor outdoor communication receive abnormal outdoor unit E9 Indoor outdoor communication send abnormal outdoor unit EA Indoor outdoor connection erroneous wiring number of indoor units mismatch Eb Indoor outdoor connection erroneous wiring indoor unit power failure disconnection Ed Serial communication abnormal M NET E0 E7 Communi...

Page 31: ...xample When 115 every other second 1 15 0 100 When 100 or higher 100s digit and 10s and units digits are displayed alternately Example When 100 every other second 1 00 0 999 When 100 or higher 100s digit and 10s and units digits are displayed alternately Example When 425 every other second 4 25 0 999 When 100 or higher 100s digit and 10s and units digits are displayed alternately Example When 245 ...

Page 32: ...ly stopped Example Comp only ON at cooling operation C4 39 88 When 0 C or lower and temperature are displayed alternately Example When 15 every other second 15 0 216 When 100 or higher 100s digit and 10s and units digits are displayed alternately Example When 130 every other second 1 30 When no abnormality history 0 When no abnormality history 0 0 999 When 100 or higher 100s digit and 10s and unit...

Page 33: ...mation 2 Indoor unit piping temperature TH2 Indoor 1 39 88 Indoor unit piping temperature TH2 Indoor 2 39 88 Indoor unit piping temperature TH2 Indoor 3 39 88 Indoor unit piping temperature TH2 Indoor 4 39 88 Indoor intake tem perature 8 39 5 Indoor set temperature 17 30 Code display Code display C C C C C C SW2 setting Display contents Description of display Unit Outdoor unit set information 1 Fu...

Page 34: ...her 100s digit and 10s and units digits are displayed alternately Example When 100 every other second 1 00 1 5 C C C SW2 setting Display contents Description of display Unit Indoor unit No 1 Indoor unit No 3 Indoor unit No 2 Indoor unit No 4 Control mode Indoor unit Ordinary Hot adjustment Defrosting Heater ON Freeze prevention Surge prevention Compressor OFF Display 0 1 2 3 4 5 6 7 Outdoor unit C...

Page 35: ...r TH2 3 Outdoor condenser evaporater temp thermistor TH3 No abnormal thermistor 0 100 When 100 or higher 100s digit and 10s and units digits are displayed alternately Example When 100 every other second 00 0 400 When 100 or higher 100s digit and 10s and units digits are displayed alternately Example When 200 every other second 2 00 39 88 When 0 C or lower and temperature are displayed alternately ...

Page 36: ...every other second 2 45 1 5 39 88 When 0 C or lower and temperature are displayed alternately When there are no indoor units 00 is displayed 39 88 When 0 C or lower and temperature are displayed alternately When there are no indoor units 00 is displayed 39 88 When 0 C or lower and temperature are displayed alternately When there are no indoor units 00 is displayed 39 88 When 0 C or lower and tempe...

Page 37: ...ce value with a multimeter Ambient temperature 10 C to 30 C Measure the resistance value across the terminals with a multimeter Winding temperature 20 C Measure the resistance value across the terminals with a multimeter Winding temperature 20 C Normal 4 3 kΩ 9 6 kΩ 160 kΩ 410 kΩ Abnormal Open or short Based on thermistor characteristic table next page TH1 3 TH2 White Blue Black Normal 45 5 Ω Abno...

Page 38: ...stor Ro 15 kΩ 3 B constant 3 460 kΩ 2 Rt 15 exp 3 460 0 C 15 kΩ 10 C 9 7 kΩ 20 C 6 4 kΩ 25 C 5 3 kΩ 30 C 4 3 kΩ 40 C 3 1 kΩ 1 1 273 t 273 Resistance High temperature thermistor Thermistor Discharge temperature detection TH2 Thermistor Discharge temperature detection TH2 Thermistor R120 7 465 kΩ 2 B constant 4 057 kΩ 2 Rt 7 465 exp 4 057 20 C 250 kΩ 70 C 34 kΩ 30 C 160 kΩ 80 C 24 kΩ 40 C 104 kΩ 90 ...

Page 39: ...hite Red Orange Blue Brown Yellow Brown Red Blue Yellow White Connector Outdoor controller board CN40 Drive circuit Output phase No ø1 ø2 ø3 ø4 Output state 1 2 3 4 ON OFF OFF ON ON ON OFF OFF OFF ON ON OFF OFF OFF ON ON LEV opening and closing operations When the power is turned on to register the valve posi tion a 2200 pulses valve close signal is output and is al ways set to point A If the valv...

Page 40: ...the valve assembly of the valve body up and down and controls the flow by changing the distance between the orifice and the bottom end of the valve Trouble mode Microcomputer drive cir cuit faulty LEV mechanism locked LEV motor coil open or shorted Connector connection in correct or contact faulty Judgment method 1 Disconnect the control circuit board connector and con nect the check LED shown bel...

Page 41: ...t unit in the motor removed state dry the bellows section by performing the cooling operation for 30 minutes 4 6 Remove the cap of the replacement motor and butt the bottom of the motor against the top of the valve body and hold it so that both are aligned and connect the motor to the valve body with the lock nut Coat the entire periphery of the threaded part with screw lock Be sure that the screw...

Page 42: ...ecome continuous operation ON OFF temperature adjust ment and other operations cannot be performed from the remote controller When a PEH P8MYA or P10MYA indoor unit is connected check that the special indoor unit power is turned on then start emergency operation e Since cool air is discharged from the indoor unit when the outdoor unit starts the defrosting operation during heating emergency operat...

Page 43: ...ed SW4 Cooling Heating OFF ON 1 2 NO YES 4 Emergency operation method Before starting recheck that the trouble allows emergency operation 1 Only when PEH P8MYA or P10MYAindoor unit connected 1 When PEH P8MYA or P10MYA indoor unit is connected first turn off the outdoor unit power then turn off the indoor unit power 5 Emergency operation release method Turn off mains power Outdoor indoor 1 a Turn o...

Page 44: ...diam eter or wiring length outside specifi cation 3 Five or more indoor units connected to outdoor unit 4 Outdoor controller board send receive circuit faulty 5 Indoor controller board send receive circuit faulty 6 Noise has entered on power supply or indoor outdoor connection wire 1 Indoor outdoor connection wire con tact faulty or erroneous wiring 2 Indoor outdoor connection wire diam eter or wi...

Page 45: ...r controller board faulty 1 Overload operation exceeding unit us age range limit 2 Power supply terminal voltage low 3 Power supply missing phase 4 Compressor motor faulty 5 Compressor locked 6 Connector CN22 on outdoor control ler board dislodged or contact faulty 7 51C disconnected or contact faulty 1 Started with ball valve closed 2 Connector CN21 on outdoor control ler board dislodged or conta...

Page 46: ...oard open or contact faulty 3 63L disconnected or contact faulty 4 Part faulty 1 Remote controller send receive circuit faulty 2 Refrigerant address 0 indoor control ler board send receive circuit faulty 3 Noise entered on remote controller transmission line 1 Remote controller send receive circuit faulty 2 Noise entered on remote controller transmission line 1 Indoor outdoor connection wire con t...

Page 47: ... 1 Thermistor characteristics faulty 2 Connector contact faulty Insertion faulty 3 Drain sensor wiring open or contact faulty 4 Indoor controller board faulty Judgment method and remedy 1 3 Check thermistor resistance value 0 C 15 0 kΩ 10 C 9 7 kΩ 20 C 6 4 kΩ 30 C 5 3 kΩ 40 C 3 1 kΩ Open or faulty contact can be detected by applying force pulling bending to lead wire while measuring thermistor res...

Page 48: ...r waves created by trans mission of drain water from lead wire clogged filter etc 4 Indoor controller board faulty 1 Water leaking from humidifier water supply pipe 2 Water droplets on drain sensor 3 Indoor controller board faulty Cool and dry 1 Filter is clogged insufficient air flow 2 Air duct short cycle 3 Low load operation low temperature exceeding allowable range 4 Indoor fan motor faulty 5 ...

Page 49: ...ler or an other indoor controller board even once in 3 minutes an abnormal ity is recognized 2 When the indoor controller board can not receive signals even once in 2 minutes an abnormality is recognized Cause 1 Indoor intake piping thermistor tem perature differential small EInsufficient refrigerant EPiping thermistor holder dislodged ERefrigerant circuit faulty 2 Extension piping When multiple u...

Page 50: ...pter is con nected to CN32 on indoor controller board Air conditioner is connected to MELANS and is set to local operation prohibit mode from centralized control ler etc 3 Cause of item 2 1 Insufficient refrigerant 2 Filter clogged 3 Outdoor unit heat exchanger clogged 4 Air duct short cycle 5 Outdoor unit bypass circuit faulty Symptom judgment and remedy 1 Check LED2 on indoor controller board 1 ...

Page 51: ...unit bypass circuit faulty Symptom judgment and remedy 1 Since the discharge temperature rises when there is leakage judge by measuring the tem perature Check piping connections etc for gas leak age 2 Check heat insulation 3 Open intake grille and check filter Clean filter and remove dust and dirt 4 Since the indoor piping temperature and out let pressure rise when the heat exchanger is clogged ju...

Page 52: ...4 minutes EA after 4 minutes Eb after 4 minutes EA after 4 minutes Eb after 4 minutes EA after 4 minutes Eb after 4 minutes EA after 4 minutes Eb after 4 minutes EA after 4 minutes Eb after 4 minutes EA after 4 minutes Eb after 4 minutes EA after 4 minutes Eb after 4 minutes LED1 On Off Off On On Off Off On Off On Off Off Off Off Off On On LED2 On Off Off Off On Off Off Off Off Off Off Off Off Off...

Page 53: ...roduced Starting at least 12 hours before the test run send current through the crankcase heater If the current is running for a shorter period of time damage to the compressor could result After the above checks are complete carry out the test run as indicated in the following outline 2 Starting and finishing the test run Procedure from the indoor unit carry out the test run as in the manual prov...

Page 54: ...emp thermistor Open short in liquid temp or condenser evaporater temp thermistor Compressor overcurrent interruption 51C operation High pressure error 63H1 operation Low pressure error 63L operation Power synchronous idle circuit error Inlet sensor error Piping sensor error Drain sensor error Drain overflow protector operation Water leak error PDH only Freeze prevention operation Surge prevention ...

Page 55: ... 1 are displayed in alter nation Depending on the position of the SW2 switch on the outdoor unit board the segments light up to indicate the running condition of the unit and the particulars of the check code SW2 setting 123456 000000 011110 010110 110110 011100 111100 1 Display system for error indicator The indicator corresponds to the following numbers 0 Outdoor unit 1 Indoor unit No 1 2 Indoor...

Page 56: ...tifies quality warranties based on the design development production installation and auxiliary services for products built at an authorized plant The Air Conditioning Refrigeration Systems Works acquired environmental management system standard ISO 14001 certification The ISO 14000 series is a set of standards applying to environmental protection set by the International Standard Organization ISO...