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[3] Necessary Apparatus and Materials and Notes on Their Handling

The following tools should be marked as dedicated tools for R407C.

<<Comparison of apparatus and materials used for R407C and for R22>>

Apparatus Used

Use

R22

R407C

Gauge manifold

Evacuating, refrigerant filling

Current product

Charging hose

Operation check

Current product

Charging cylinder

Refrigerant charging

Current product

Do not use

Gas leakage detector

Gas leakage check

Current product

Shared with R134a

Refrigerant collector

Refrigerant collection

R22

For R407C use only

Refrigerant cylinder

Refrigerant filling

R22

Identification of dedi-
cated use for R407C:
Record refrigerant name
and put brown belt 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 nuts

Current product

Pipe cutter

Cutting of pipes

Current product

Welder and nitrogen cylinder

Welding of pipes

Current product

Refrigerant charging meter

Refrigerant charging

Current product

Vacuum gauge

Checking the vacuum degree

Current product

Symbols:

To be used for R407C only.

Can also be used for conventional refrigerants.

Tools for R407C must be handled with more care than those for conventional refrigerants. They must not come into contact

with any water or dirt.

Содержание PUH-P8YE

Страница 1: ...TECHNICAL SERVICE MANUAL PUH P8YE PUH P10YE 2000 Single and Twin Triple Four Models AIR COOLED HEAT PUMP TYPE PACKAGED AIR CONDITIONERS For use with the R407 Outdoor unit ...

Страница 2: ...Operation 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 6 6 6 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 7 7 ...

Страница 3: ...tion 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 no...

Страница 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...

Страница 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 ...

Страница 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 ...

Страница 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 ...

Страница 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...

Страница 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...

Страница 10: ...Power 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 max...

Страница 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 a...

Страница 12: ...kout hole 215 Accessory Refrigerant gas conn pipe 1 pc The connecting pipe is fixed with the unit Packing for conn pipe 1 pc Attached near the ball valve Conduit mouting plate Painted the same color as the unit body ø40 ø33 ø27 each 1pc Tapping screw 4 10 4 pcs 1490 215 Note1 Note Please leave a space under the outdoor unit for the piping When you connect the piping from the bottom Please be caref...

Страница 13: ...F1 F20 F10 4 F01 5P CN51 21S4 Blue Black White S1 S2 S3 Red Black White Red N F BOARD Green Yellow Controller Box Power source 3N 380 400 415 V 50 Hz TB3 TB1 Unit body To indoor unit PUH P10YE PUH P8YE SW5 1 ON OFF 4 SW5 1 ON OFF 4 4 OFF ON 1 4 OFF ON 1 NOTE SW5 4 IS OFF IN CASE OF PUH P8YE SW5 4 IS ON IN CASE OF PUH P10YE Symbol Explanation Symbol Name FUSE 15A 250VAC CLASS T FUSE 6 3A 250VAC CLA...

Страница 14: ...P10YE 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 j 10HP j 50 50 4HP 4HP j j j j j 5HP 5HP j j j j SDD 50WSA E 33 33 33 2 5HP 2...

Страница 15: ...it 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 3...

Страница 16: ...1 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 22 20 18 16 0 7 0 9 1 1 1 22 Input ratio Outdoor air temp CDB Indoor inlet air wet bulb tem p CW B 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 Outdoor air temperature CWB Indoor inlet air dry bulb temperature CDB 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 Outdoo...

Страница 17: ... length m Actual piping length m 0 47 Number of bend PUH P10YE 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 P8YE Capacity ratio...

Страница 18: ...t be 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 rop...

Страница 19: ... Sound pressure level in anechoic room Measurement condition Measurement condition 63Hz 63 125Hz 60 250Hz 56 500Hz 56 1000Hz 51 2000Hz 47 4000Hz 44 8000Hz 40 dB 63Hz 63 125Hz 59 250Hz 56 500Hz 55 1000Hz 50 2000Hz 45 4000Hz 42 8000Hz 39 dB 1m 1m A B 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...

Страница 20: ...oved MAIN BOARD Power source terminal block Terminal block for outdoor indoor control wiring connection N F BOARD F C BOARD Over current relay 51C Magnet contactor for compresser 52C Transformer Ball valve for refrigerant piping connection Liquid side Flare Ball valve for refrigerant piping connection Gas side Flange Electrical parts Box Outdoor unit heat exchanger Compresser ...

Страница 21: ...H3 Check joint high pressure Solenoid valve SV1 Electric expansion valve LEV 4way valve Pressure switch 63H2 Pressure switch 63H1 Thermistor Discharge temp TH2 Thermistor Liquid temp TH1 Accumulater At the back of the heat exchanger panel header cover When this screw is removed the header cover is removed ...

Страница 22: ...rt Muffler Compressor Solenoid valve Service port Strainer Ball valve Service port High pressure switch Control Indoor units Strainer PUH P8 10 PUH P8 10 H h L R a R b R c H L H h L R a R b R c R d PUH P8 10 L 50 m H 40 m L Ra Rb 70 m L Ra L Rb 50 m Ra Rb 8 m H 40 m h 1 m L Ra Rb Rc 70 m L Ra L Rb L Rc 50 m Ra Rb Rb Rc Rc Ra 8 m H 40 m h 1 m L Ra Rb Rc Rd 70 m L Ra L Rb L Rc L Rd 50 m Ra Rb Rb Rc ...

Страница 23: ... air temperature CWB 27 15 Indoor air temperature CDB Additional refrigerant charge 0 05 L 0 026 Ra Rb Rc Rd 0 5 amount of indoor units kg 0 05 L 0 026 Ra Rb Rc Rd 0 5 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 Ra Rb Rc Rd Join section actual length The value of calculation result at the second decimal place must be ...

Страница 24: ...inal block Semiconductor relay Semiconductor relay Over current 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 d...

Страница 25: ...ing 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 compressor 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 whi...

Страница 26: ...g to cooling the fan step conforms to item 2 5 Two minutes after the fan is started the fan step number of units is controlled every 30 seconds based on the piping temperature TH1 6 When TH1 reaches 50 C or higher or when the control high pressure switch 63H2 tripped the fan output becomes 100 7 Fan output while the compressor is operating is within the 20 to 100 range FAN step The following expre...

Страница 27: ...1 initial setting 50 minutes and the piping temperature TH1 is below 10 C 2 When the integrated compressor operation time has exceeded 30 minutes and the piping differential tempera ture is TH1 8 TH1 10 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 comma...

Страница 28: ...2200 pulse down output 60 pulses up is output c Sixty pulses up output ends initial processing At this point the valves are fully closed 2 Control contents At compressor starting At compressor stopping At defrosting Normal LEV output opening angle Initial opening angle 1000 pulses 2000 pulses full close See next item Opening angle control range Approx 1000 to 2000 pulses 1000 to 1500 pulses 3 Norm...

Страница 29: ...ed Training Kind of switch DIP SW Pole 1 2 3 4 5 6 1 Trial run performs trail run processing by input change while stopped For details see the trail run section 2 Mode input is entered by SW3 OFF ON change ___ Press and hold down SW3 for about 2 seconds The set mode can be registered according to the outdoor unit setting information on page 31 2 Switch functions at set mode change Note After chang...

Страница 30: ...Heating d Defrost Units digit Relay output PUH P8YE P10YE 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 communicatio...

Страница 31: ...played alternately Example 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 alternate...

Страница 32: ... mode when abnormally 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 dig...

Страница 33: ...ation 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 OFF ON 1 2 3 4 5 6 OFF ON 1 2 3 4 5 6 OFF ON 1 2 3 4 5 6 OFF ON 1 2 3 4 5 6 SW2 setting Dis...

Страница 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...

Страница 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 ...

Страница 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...

Страница 37: ...e 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 22 8 Ω Abnormal Op...

Страница 38: ...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 50 40 30 20 10 0 20 10 10 20 30 40 50 0 25 20 15 10 5 0 90 100 110 120 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 ...

Страница 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...

Страница 40: ...s 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 b...

Страница 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...

Страница 42: ...become continuous operation ON OFF temperature adjust ment and other operations cannot be performed from the remote controller When a PEH P8YE or P10YE indoor unit is connected check that the special indoor unit power is turned on then start emergency operation 5 Since cool air is discharged from the indoor unit when the outdoor unit starts the defrosting operation during heating emergency operati...

Страница 43: ...that emergency operation starts and that operation mode display flashes Set operation mode cooling or heating with SW4 2 on outdoor board SW4 1 not used SW4 Cooling Heating OFF ON 1 2 NO YES 1 When PEH P8YE or P10YE indoor unit is con nected first turn off the outdoor unit power then turn off the indoor unit power Turn off mains power Outdoor indoor 1 1 Turn on mains power 5 Turn off emergency ope...

Страница 44: ... diam eter or wiring length outside specifica tion 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 contact faulty or erroneous wiring 2 Indoor outdoor connection wire diam eter or wi...

Страница 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...

Страница 46: ... board 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...

Страница 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 re s...

Страница 48: ...ter waves created by transmis sion 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 ...

Страница 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...

Страница 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 ...

Страница 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...

Страница 52: ... 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 ...

Страница 53: ...ced 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 provided...

Страница 54: ...mp 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 o...

Страница 55: ...re 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 uni...

Страница 56: ...ISO ISO 9001 certifies quality warranties based on the design development production installation and auxiliary services for products built at an authorized plant The Air Conditioning Refrigeration SystemsWorks 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 O...

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