Mitsubishi Electric PUMY-P250YBM-BS Technical & Service Manual Download Page 49

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Check code

1500

(U7)

Superheat due to low discharge temperature trouble

Abnormal points and detection methods

Causes and checkpoints

If the discharge superheat is continuously detected −15

or less (*) for 5

minutes even though the indoor LEV has minimum open pulse after the

compressor starts operating for 10 minutes.

LEV: Linear expansion valve

TH4: Thermistor <Compressor>

63HS: High pressure sensor

*At this temperature, conditions for the abnormality detection will not be

satisfied if no abnormality is detected on either TH4 or 63HS.

Disconnection or loose connection of TH4

Defective holder of TH4

Disconnection of LEV coil
Disconnection of LEV connector
LEV performance failure

●Diagnosis of defects

Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.

Diagnosis

Remedy

Chart 1 of 2

Yes

Is the

TH4 wiring disconnected?

Is the resistance normal?

Is there any abnormality

such as half-disconnection or

breakage?

Connect the wiring properly.

Replace the

TH4.

Connect the connector properly,

or replace the LEV.

Check the resistance of TH4.

Check the connector contact and wiring of

the indoor LEV.

Disconnect the indoor LEV wiring to check

the resistance.

(disconnected)

(connected properly)

temp. - resistance characteristic

···700 k

10 ···410 k

···250 k

···160 k

40 ···104 k

Continue to the next page.

OCH760

Summary of Contents for PUMY-P250YBM-BS

Page 1: ...es technical data of the outdoor units only As for indoor units refer to its service manual No OCH760 May 2021 SPLIT TYPE HEAT PUMP AIR CONDITIONERS Outdoor unit Model Name Service Ref PUMY P250YBM PUMY P250YBM TH PUMY P300YBM PUMY P300YBM TH PUMY P250YBM ER PUMY P250YBM ER TH PUMY P300YBM ER PUMY P300YBM ER TH PUMY P250YBM ET PUMY P250YBM ET TH PUMY P300YBM ET PUMY P300YBM ET TH Salt proof model ...

Page 2: ...nation inside refrigerant piping can cause deterio ration of refrigerant oil etc Follow the instructions below to prevent abrasive components contained in sandpaper and cutting tools from entering the refrigerant circuit because those components can cause failures of the compressor and valves To deburr pipes use a reamer or other deburring tools not sandpaper To cut pipes use a pipe cutter not a g...

Page 3: ...r 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 Although BS model has been designed to be resistant to salt damage observe the following precautions to maintain the performance of the unit 1 Avoid installing the unit in a locat...

Page 4: ... dimensions Outside diameter Dimension A 0 0 4 mm R410A R22 mm 1 4 3 8 1 2 5 8 3 4 6 35 9 52 12 70 15 88 19 05 17 0 22 0 26 0 29 0 17 0 22 0 24 0 27 0 36 0 Nominal dimensions inch Flare nut dimensions Outside diameter Dimension B mm R410A R22 mm Dimension A Dimension B 1 3 Cautions for refrigerant piping work New refrigerant R410A is adopted for replacement inverter series Although the refrigerant...

Page 5: ...il minimum amount Safety charger Prevent compressor malfunction when charging refrigerant by spraying liquid refrigerant Tool exclusive for R410A Charge valve Prevent gas from blowing out when detaching charge hose Tool exclusive for R410A Vacuum pump Vacuum drying and air purge Tools for other refrigerants can be used if equipped with adopter for reverse flow check Usable if equipped with adopter...

Page 6: ...PAC LV11M J Branching pipe components CMY Y62 G E CMY Y64 G E CMY Y68 G E Branch header 2 branches Branch header 4 branches Branch header 8 branches Remote controller Name M NET remote controller MA remote controller Model number PAR F27MEA E PAR U02MEDA PAR 4xMAA PAR 3xMAA x represents 0 or later Functions A handy remote controller for use in conjunction with the Melans centralized management sys...

Page 7: ...TRUCTION BRANCH BOX SYSTEM Outdoor unit 10HP 12HP P250YBM P300YBM Applicable indoor unit Capacity kW unit Type 15 to Type 50 Number of units 2 to 12 units Total system capacity range 50 to 130 of outdoor unit capacity 14 0 to 36 4 kW o 50 to 130 of outdoor unit capacity 16 8 to 43 5 kW o Branch box that can be connected Number of units 1 to 3 units Connectable indoor unit lineup Model type Model n...

Page 8: ...FFY P VKM PFFY P VCM PFFY P VL type indoor units cannot be used with MIXED SYSTEM PAC MK34BC 3 branches MAX 3 units 2 3 SYSTEM CONSTRUCTION MIXED SYSTEM Outdoor unit 10HP 12HP P250YBM P300YBM Applicable indoor unit Capacity CITY MULTI indoor unit 3 Type 10 to Type 250 Via branch box kW unit Type 15 to Type 50 Number of units Total Via branch box CITY MULTI indoor Total Via branch box CITY MULTI in...

Page 9: ...Outdoor unit model type M NET control Salt proof type 3 Operating temperature range Cooling Heating Indoor intake air temperature W B 15 to 24 C D B 15 to 27 C Outdoor intake air temperature D B 5 to 52 C 1 W B 20 to 15 C Notes D B Dry Bulb Temperature W B Wet Bulb Temperature 1 10 to 52 C D B When connecting PKFY P10 15 20 25 32VLM PFFY P20 25 32VKM PFFY P20 25 32VCM PFFY P20 25 32VLEM PEFY P63 7...

Page 10: ...ater kW Lubricant FVC68D 3 0 litter External finish Galvanized Steel Sheet Munsell No 3Y 7 8 1 1 External dimension HxWxD mm 1 662 1 050 460 45 inch 65 7 16 41 11 32 187 64 1 49 64 Protection devices High pressure protection High pressure Switch Inverter circuit COMP FAN Overcurrent detection Overheat detection Heat sink thermistor Compressor Compressor thermistor Overcurrent detection Fan motor O...

Page 11: ...arison with Essential Load Against the essential load 25 0kW the maximum system capacity is 25 5 kW Proper outdoor units have been selected 8 Calculation of Maximum Indoor Unit Capacity of Each Room CTx CTo thus calculate by the calculation below Room1 2 Maximum Capacity Room1 or 2 Capacity after the Temperature Correction Room1 to 4 Total Capacity after the Temperature Correction 25 5 5 6 1 03 5 ...

Page 12: ...ndoor Unit Rating Indoor Design Temperature Correction 9 0 0 80 7 2 kW OK fulfills the load 6 5 kW Note If CTx CTo please refer to the Cooling section to calculate the Maximum Indoor Unit Capacity of Each Room Completed selecting units since the selected units fulfill the heating loads of Room 1 to 4 Heating Design Condition Outdoor Design Wet Bulb Temperature Total Heating Load Room1 Room2 Indoor...

Page 13: ...24 C W B Outdoor Temperature C D B Indoor Temperature The outdoor units have varied capacity at different designing temperature Using the nominal cooling heating capacity value and the ratio below the capacity can be observed at various temperature Figure 7 Indoor unit temperature correction To be used to correct indoor unit capacity only Figure 8 Outdoor unit temperature correction To be used to ...

Page 14: ...only 15 16 17 18 19 20 21 22 23 24 25 26 27 0 6 0 7 0 8 0 9 1 0 1 1 1 2 Ratio of heating capacity Indoor Temperature C D B 20 15 10 5 0 5 10 15 0 5 0 6 0 7 0 8 0 9 1 0 1 1 1 2 Ratio of heating capacity Outdoor Temperature C W B 20 C D B Indoor Temperature Ratio of power input Outdoor Temperature C W B Indoor Temperature 20 15 10 5 0 5 10 15 0 0 0 2 0 4 0 6 0 8 1 0 1 2 1 4 25 C D B 15 C D B 20 C D ...

Page 15: ...its kW Total capacity of indoor units kW Capacity kW Total capacity of indoor units kW 1 5 3 5 5 5 7 5 9 5 11 5 13 5 15 5 17 5 19 5 21 5 23 5 25 5 27 5 29 5 31 5 33 5 35 5 37 5 39 5 0 0 5 0 10 0 15 0 20 0 25 0 30 0 35 0 1 5 3 5 5 5 7 5 9 5 11 5 13 5 15 5 17 5 19 5 21 5 23 5 25 5 27 5 29 5 31 5 33 5 35 5 37 5 39 5 0 0 2 0 4 0 6 0 8 0 10 0 12 0 14 0 16 0 1 5 3 5 5 5 7 5 9 5 11 5 13 5 15 5 17 5 19 5 ...

Page 16: ... 23 5 25 5 27 5 29 5 31 5 33 5 35 5 37 5 39 5 41 5 43 5 45 5 0 0 5 0 10 0 15 0 20 0 25 0 30 0 35 0 40 0 1 5 3 5 5 5 7 5 9 5 11 5 13 5 15 5 17 5 19 5 21 5 23 5 25 5 27 5 29 5 31 5 33 5 35 5 37 5 39 5 41 5 43 5 45 5 0 0 2 0 4 0 6 0 8 0 10 0 12 0 14 0 16 0 18 0 20 0 1 5 3 5 5 5 7 5 9 5 11 5 13 5 15 5 17 5 19 5 21 5 23 5 25 5 27 5 29 5 31 5 33 5 35 5 37 5 39 5 41 5 43 5 45 5 0 0 2 0 4 0 6 0 8 0 10 0 1...

Page 17: ... 19 5 21 5 23 5 25 5 27 5 29 5 31 5 33 5 35 5 37 5 39 5 0 0 5 0 10 0 15 0 20 0 25 0 30 0 35 0 1 5 3 5 5 5 7 5 9 5 11 5 13 5 15 5 17 5 19 5 21 5 23 5 25 5 27 5 29 5 31 5 33 5 35 5 37 5 39 5 0 0 2 0 4 0 6 0 8 0 10 0 12 0 14 0 1 5 3 5 5 5 7 5 9 5 11 5 13 5 15 5 17 5 19 5 21 5 23 5 25 5 27 5 29 5 31 5 33 5 35 5 37 5 39 5 0 0 2 0 4 0 6 0 8 0 380 V 400 V 415 V 4 3 3 PUMY P250YBM Heating ...

Page 18: ... 5 23 5 25 5 27 5 29 5 31 5 33 5 35 5 37 5 39 5 41 5 43 5 45 5 0 0 5 0 10 0 15 0 20 0 25 0 30 0 35 0 40 0 45 0 1 5 3 5 5 5 7 5 9 5 11 5 13 5 15 5 17 5 19 5 21 5 23 5 25 5 27 5 29 5 31 5 33 5 35 5 37 5 39 5 41 5 43 5 45 5 0 0 2 0 4 0 6 0 8 0 10 0 12 0 14 0 16 0 18 0 1 5 3 5 5 5 7 5 9 5 11 5 13 5 15 5 17 5 19 5 21 5 23 5 25 5 27 5 29 5 31 5 33 5 35 5 37 5 39 5 41 5 43 5 45 5 0 0 2 0 4 0 6 0 8 0 10 0...

Page 19: ...y During heating find the equivalent piping length and find the capacity ratio corresponding to standard piping length from Figure 12 Then multiply by the heating capacity from Figure 9 and 10 in 4 2 CORRECTION BY TEMPERATURE to obtain the actual capacity 1 Capacity Correction Curve Figure 11 PUMY P250YBM Cooling Figure 12 PUMY P250YBM Heating Capacity ratio 21 0 14 0 28 0 36 4 Piping equivalent l...

Page 20: ...the following table to obtain the actual heating capacity Correction factor diagram Outdoor Intake temperature C W B 6 4 2 0 2 4 6 8 10 15 20 Correction factor 1 00 0 98 0 89 0 88 0 89 0 90 0 95 0 95 0 95 0 95 0 95 0 20 40 60 80 100 120 140 160 180 0 65 0 70 0 75 0 80 0 85 0 90 0 95 1 00 Capacity ratio Piping equivalent length m Capacity ratio 25 13 16 75 33 5 43 5 Piping equivalent length m Total...

Page 21: ... pipe length 25 30 Fan speed Hi Hi Amount of refrigerant kg 14 1 15 1 Outdoor unit Electric current A 12 2 11 2 17 8 13 4 Voltage V 380 380 Compressor frequency Hz 59 73 80 85 LEV opening Branch box Pulse 149 444 154 155 Pressure High pressure Low pressure MPa 3 07 0 98 2 12 0 64 3 26 0 90 2 09 0 61 Temp of each section Outdoor unit Discharge C 79 4 53 0 75 0 53 3 Heat exchanger outlet 36 7 12 1 3...

Page 22: ...EE SPACE Around the unit The diagram below shows a basic example Explanation of particular details are given in the installation manuals etc Please secure the unit ﬁrmly with 4 foundation M10 bolts Bolts and washers must be purchased locally FOUNDATION Piping and wiring connections can be made from 4 directions Front Right Rear and Bottom Over 25mm Free Over 25mm Over 1000mm Over 150mm Example of ...

Page 23: ... Switch Unit Address Selection ones digit Switch Unit Address Selection tens digit Connector Connection for Option Connector Connection for Option Connector Connection for Option Connector Connection for Option Connector Connection for Option LED Operation Inspection Display LED Power Supply to Main Microcomputer Fuse T6 3AL250V M NET Power Circuit Board Connection Terminal Electrical Parts Box 5 ...

Page 24: ...1 ON 1 2 3 4 5 6 SW1 ON 1 2 3 4 5 6 CITY MULTI Indoor unit 009 CITY MULTI Indoor unit 010 MA remote controller CITY MULTI 001 050 For centralized management 061 Outdoor unit For Branch box CITY MULTI indoor unit 0 1 2 3 4 5 6 7 8 9 Address SW CITY MULTI Indoor unit 011 CITY MULTI Indoor unit 012 CITY MULTI Indoor unit 013 CITY MULTI Indoor unit 014 CITY MULTI Indoor unit 015 111 161 MA remote cont...

Page 25: ...H2 HIC pipe Stop valve Service port Capillary tube 1 280 3 8 335 1 2 Accumulator Refrigerant Liquid pipe Strainer Outdoor unit Capillary tube 1 Capillary tube 2 PUMY P250 300YBM ø2 4 ø0 8 L600 ø4 0 ø3 0 L220 Unit mm Note When connecting the CONNECTION KIT PAC LV11M J and an M series indoor unit refer to the installation manual for the CONNECTION KIT Refrigerant piping specifications dimensions of ...

Page 26: ...pipes diameter Diameter A Diameter B mm mm mm MAC A454JP ø9 52 ø12 7 ø9 52 ø12 7 MAC A455JP ø12 7 ø9 52 ø12 7 ø9 52 MAC A456JP ø12 7 ø15 88 ø12 7 ø15 88 PAC 493PI ø6 35 ø9 52 ø6 35 ø9 52 PAC SG76RJ E ø9 52 ø15 88 ø9 52 ø15 88 PAC SG75RJ E ø15 88 ø19 05 ø15 88 ø19 05 PAC SG71RJ E ø15 88 1 ø22 2 2 ø15 88 1 ø22 2 2 PAC SG77RJ E ø15 88 1 ø25 4 2 ø15 88 1 ø25 4 2 1 When connecting to MSDD 50AR E or a b...

Page 27: ...PAC SG75RJ E ø15 88 ø19 05 ø15 88 ø19 05 PAC SG71RJ E ø15 88 1 ø22 2 2 ø15 88 1 ø22 2 2 PAC SG77RJ E ø15 88 1 ø25 4 2 ø15 88 1 ø25 4 2 1 When connecting to MSDD 50AR E or a branch box the pipes on site Use the nuts that are included with the 2 branch pipe and branch box 2 Brazing 2 branch pipe Joint Optional parts According to the connection method you can choose the favorite one Model name Connec...

Page 28: ...inal block TB6 on the M NET remote controller c Set the address setting switch on outdoor unit P C B as shown below d Use the CITY MULTI series indoor unit M IC within the group with the most functions as the M IC Main unit Combinations of 1 through 3 above are possible TB5 TB15 01 101 M IC Main TB3 TB7 51 OC TB5 TB15 02 M IC Sub M NET RC 1 2 A B M1M2 S M1M2 S M1M2 S 1 2 M1M2 S Group A TB5 TB15 01...

Page 29: ...te controller address is the CITY MULTI series indoor unit main address plus 100 In this case it should be 101 M NET remote controller M NET RC and MA remote controller MA RC cannot be used together Do not connect anything with TB15 of CITY MULTI series indoor unit M IC Name Symbol Maximum units for connection Outdoor unit OC CITY MULTI series Indoor unit M IC Refer to 2 1 SYSTEM CONSTRUCTION M NE...

Page 30: ...he power supply unit with the earth g Set the address setting switch as follows h The group setting operations among the multiple CITY MULTI series indoor units are done by the M NET remote con troller M NET RC after the electrical power has been turned on Unit Range Setting Method M IC Main 01 to 50 Use the smallest address within the same group of CITY MULTI series indoor units M IC Sub 01 to 50...

Page 31: ...inal blocks TB5 for transmission wires for CITY MULTI series indoor units M IC that have been connected to different outdoor units OC Set all addresses to ensure that they are not overlapped M NET remote controller and MA remote controller cannot be connected with the CITY MULTI series indoor unit of the same group wiring together A B C E D M IC 51 TB5 M NET RC 01 TB5 03 M IC TB5 02 TB5 04 M IC TB...

Page 32: ...case of using 2 remote controllers connect terminals 1 and 2 on transmission cable terminal block TB15 for each indoor unit with the terminal block for 2 MA remote controllers Set either one of the MA remote controllers to sub remote controller Refer to the installation manual of MA remote con troller a The same as above 1 a b The same as above 1 b c In the case of group operation using MA remote ...

Page 33: ...remote controller cannot be connected without address setting 3 MA remote controllers or more cannot be connected with the CITY MULTI series indoor unit of the same group The second MA remote controller is connected with the terminal block TB15 for the MA remote controller of the same CITY MULTI series indoor unit M IC as the first MA remote control NO MA RC 00 M IC 00 OC MA RC 00 M IC TB5 1 2 TB1...

Page 34: ...block TB7 is unnecessary Connect the termi nal S on the power supply unit with the earth g Set the address setting switch as follows Unit Range Setting Method M IC Main 01 to 50 Use the smallest address within the same group of indoor units M IC Sub 01 to 50 Use an address other than the M IC Main in the same group of CITY MULTI series indoor units This must be in sequence with the M IC Main Outdo...

Page 35: ... and L1 L2 L6 L7 500 m 1 25 E more Longest transmission cable length M NET cable L1 and L3 L4 and L2 L6 and L7 200 m 1 25 E or more MA Remote controller cable length m1 and m1 m2 m3 and m1 m2 m3 m4 200 m 0 3 to 1 25 E A Group B Group C Group D Shielded Wire E Sub MA Remote Controller Address example A B C E M IC 51 TB5 TB15 TB15 TB15 TB15 MA RC 01 M IC TB5 03 M IC TB5 02 M IC TB5 04 M IC 05 M IC T...

Page 36: ...the set address of connected Branch Box set the A IC addresses sequentially by SW1 on Branch Box For example when setting the Branch Box address to 01 A IC addresses set 02 03 04 and 05 Branch Box 01 to 50 Use a number within the range 1 50 but it should not make the highest address of connected A IC exceed 50 Outdoor Unit 51 to 100 Use the smallest address of all the Branch Box plus 50 The addres...

Page 37: ... TB S1 S2 S3 TB S1 S2 S3 TB S1 S2 S3 TB S1 S2 S3 TB S1 S2 S3 TB S1 S2 S3 TB S1 S2 S3 TB3B S1 S2 S3 TB3C S1 S2 S3 TB3D S1 S2 S3 TB3E S1 S2 S3 TB3A S1 S2 S3 TB3B S1 S2 S3 TB3C S1 S2 S3 M1 M2 S TB5 M1 M2 S TB5 L 01 10 2 Branch Box A A Branch Box A MA RC MA RC A IC A IC A IC A IC A IC A IC A IC TB5 TB15 TB5 TB15 TB5 TB15 TB5 TB15 L3 A A B A B A Shielded wire Address example NO NO MA RC L7 m1 TB3A A IC...

Page 38: ...s follows Unit Range Setting Method M IC 01 to 50 A IC 01 to 50 According to the set address of connected Branch Box set the A IC addresses sequentially by SW1 SW11 SW12 on Branch Box For example when the Branch Box address is set to 01 set the A IC addresses to 01 02 03 04 and 05 Branch Box 01 to 50 Use a number within the range 1 50 but it should not make the highest address of connected A IC ex...

Page 39: ...C 06 A IC 07 A IC 08 S1 S2 S3 TB S1 S2 TB5 TB15 1 2 A B MA RC S3 TB S1 S2 S3 TB S1 S2 S3 TB S1 S2 S3 TB S1 S2 S3 TB S1 S2 S3 TB S1 S2 S3 TB S1 S2 S3 TB3B S1 S2 S3 TB3C S1 S2 S3 TB3D S1 S2 S3 TB3E S1 S2 S3 TB3A S1 S2 S3 TB3B S1 S2 S3 TB3C S1 S2 S3 M1 M2 S TB5 M1 M2 S TB5 L2 A A A M IC 09 M IC 10 TB5 M1 M2 1 2 S TB5 M1 M2 S L3 L4 Power Supply Unit System controller Branch Box Branch Box A Shielded w...

Page 40: ...terminal block and ground first metallic parts like refrigerant pipes or the electrical box next then inspect all electrical wiring of outdoor unit indoor unit and all linked equipment 3 Before operation a Turn the power supply switch of the outdoor unit to on for compressor protection For a test run wait at least 12 hours from this point b Register control systems into remote controller s Never t...

Page 41: ...e or overcurrent trouble Check delay code 4350 U8 4400 Fan trouble outdoor Check delay code 4500 U3 5101 Air inlet thermistor TH21 open short or Compressor temperature thermistor TH4 open short Check delay code 1202 U4 5102 Liquid pipe temperature thermistor TH22 open short or Suction pipe temperature thermistor TH6 open short Check delay code 1211 U4 5103 Gas pipe temperature thermistor TH23 open...

Page 42: ...nnecting disconnecting any connectors or replacing boards Diagnosis Remedy 0403 Ed Serial communication error No Yes No Yes Are they connected normally Are they connected normally Check the connection of the communication line CN2 and CN4 between the outdoor controller board and power board Connect the wiring properly Replace them in the case of breakage Connect the CN2 and CN4 properly Replace th...

Page 43: ...Refrigerant shortage Refrigerant liquid accumulation in compressor while indoor unit is OFF thermo OFF Diagnosis of defects Make sure to turn the power OFF before connecting disconnecting any connectors or replacing boards Diagnosis Remedy 1102 U2 Compressor temperature trouble Yes Yes No Yes Yes No No No Is 5101 displayed when restarted Is the outdoor stop valve liquid gas fully open Is there ref...

Page 44: ... value Is it free from any trace of over heating or burning Is the resistance detected Is the resistance detected Check the voltage and appearance of the outdoor multi controller circuit board Disconnect the thermistor wiring to check the resistance Disconnect the indoor LEV wiring and check the resistance Replace the outdoor multi controller circuit board Replace the thermistor Replace the indoor...

Page 45: ...rt on indoor unit Malfunction or locked indoor fan motor Decreased airflow caused by defective inspection of outdoor temperature thermistor It detects lower temperature than actual temperature Indoor LEV performance failure Malfunction of fan driving circuit SV1 performance failure Defective high pressure sensor Defective high pressure sensor input circuit on outdoor multi controller circuit board...

Page 46: ...e filter Clogged filter No clog Continued from the previous page Is there dirt on the indoor heat exchanger Is the outdoor unit short cycled Is there dirt on the outdoor heat exchanger Are the pipes clogged or broken Wash the indoor heat exchanger Resolve the short cycle Wash the outdoor heat exchanger Correct defective pipes dirty dirty short cycled no dirt no dirt no short cycle Continue to the ...

Page 47: ...inued from the previous page Is the resistance detected Is the resistance detected Replace the TH7 Replace the indoor LEV Disconnect the indoor LEV wiring to check the resistance Continue to the next page Is the voltage normal Is it free from any trace of over heating or burning Replace the indoor controller board Check the voltage and appearance of the indoor controller board Check the resistance...

Page 48: ...Remedy Chart 4 of 4 No No Yes No Yes Yes Continued from the previous page Is the voltage detected Replace the SV1 Replace the 63HS Replace the outdoor multi controller circuit board Is the connector for outdoor multi controller circuit board 63H disconnected or loose Reconnect the connector or connect it tightly Check the 63HS voltage Is the resistance detected 48 OCH760 ...

Page 49: ...ective holder of TH4 Disconnection of LEV coil Disconnection of LEV connector LEV performance failure Diagnosis of defects Make sure to turn the power OFF before connecting disconnecting any connectors or replacing boards Diagnosis Remedy Chart 1 of 2 No Yes No Yes No Yes Is the TH4 wiring disconnected Is the resistance normal Is there any abnormality such as half disconnection or breakage Connect...

Page 50: ...t 2 of 2 Is the resistance detected Replace the indoor LEV No No Yes Yes No Yes Continued from the previous page Is the voltage normal Is it free from any trace of over heating or burning Is the voltage detected Replace the indoor controller board Replace the 63HS Replace the outdoor multi controller circuit board Check the voltage and appearance of the indoor controller board Check the 63HS volta...

Page 51: ...ti controller circuit board Indoor LEV performance failure Gas leakage or shortage Defective 63HS TH3 Thermistor Outdoor liquid pipe TH7 Thermistor Ambient LEV Linear expansion valve 63HS High pressure sensor Diagnosis of defects Make sure to turn the power OFF before connecting disconnecting any connectors or replacing boards Diagnosis Remedy Chart 1 of 2 Yes No No No No Yes Yes Yes Is the outdoo...

Page 52: ...ltage detected Is the voltage normal value Is it free from any trace of over heating or burning Is the resistance detected Replace the outdoor multi controller circuit board Replace the 63HS Replace the indoor LEV Replace the indoor controller board Check the 63HS voltage Check the voltage and appearance of the outdoor multi controller circuit board Disconnect the indoor LEV wiring and check the r...

Page 53: ...ve is closed Malfunction of outdoor LEV LEV A blockage TH21 Indoor intake temperature thermistor TH22 Indoor liquid pipe temperature thermistor TH23 Indoor gas pipe temperature thermistor LEV Linear expansion valve Diagnosis of defects Make sure to turn the power OFF before connecting disconnecting any connectors or replacing boards Diagnosis Remedy v No Yes No Yes Is the outdoor stop valve liquid...

Page 54: ...ction of LEV in branch box or indoor unit Diagnosis of defects Make sure to turn the power OFF before connecting disconnecting any connectors or replacing boards Diagnosis Remedy 1503 P6 Freeze protection of branch box or indoor unit No Yes Connect the piping and wiring to the same port No Connect the LEV wiring to the intended port properly Check the port which the piping and wiring between the i...

Page 55: ...temperature thermistor RT11 or TH1 TH22 Indoor liquid pipe temperature thermistor RT13 or TH2 TH23 Indoor gas pipe temperature thermistor TH A to E Diagnosis of defects Make sure to turn the power OFF before connecting disconnecting any connectors or replacing boards Diagnosis Remedy Is the connector for outdoor multi controller circuit board or 4 way valve coil disconnected or loose Reconnect the...

Page 56: ...nnecting disconnecting any connectors or replacing boards Diagnosis Remedy 4100 UF Compressor current interruption Locked compressor Chart 1 of 2 Yes Yes Yes No No No Is the stop valve liquid gas fully open Is the power supply voltage normal Is it connected properly Open the stop valve liquid gas fully Ensure power supply from the facility Connect the wiring properly then turn the power back ON Ch...

Page 57: ...boards Diagnosis Remedy Chart 2 of 2 Yes Yes No No Are they set properly Is the compressor faultily grounded Set the model selection switch correctly then restart Replace the compressor Defective compressor Replace the outdoor power circuit board Defective outdoor power circuit board Check whether the compressor is faultily grounded or not Continued from the previous page 57 OCH760 ...

Page 58: ...sor overcurrent interruption failure in 12 VDC power supply circuit on power circuit board Chart 1 of 2 Yes Yes Yes No No No 8 7 Is the stop valve liquid gas fully open Is the power supply voltage normal Are they set properly Open the stop valve liquid gas fully Check the power supply facility check for power supply open phase Set the model selection correctly Check the outdoor stop valve Check wh...

Page 59: ...es it operate normally Are those units short cycled Are the voltage among the phases U V V W and W U different Does it operate normally Check the DC fan motor Resolve the short cycle Replace the compressor Replace the outdoor power circuit board Complete Check the operation of indoor outdoor fan motors Check for indoor outdoor short cycle Disconnect the compressor wiring from the outdoor power cir...

Page 60: ...No No No No Yes Yes Yes Yes Yes Is there any abnormality on wirings Which sub code is displayed Does the DC bus voltage rise to approx 380 V at PAM driving Is there any abnormality on PAM wirings or reactor Is there any abnormality at the PAM circuit on the outdoor power circuit board Is there any abnormality at the PAM power supply circuit or 52C relay drive signal circuit on the outdoor multi co...

Page 61: ...istor is not broken Operate the unit and check if the problem occurs again Check the bus voltage read by the microprocessor with an operation of SW1 on the outdoor multi controller circuit board Check the bus voltage at the test points below on the outdoor power circuit board using a multimeter Test points CNDC 1 3 pin Check the power supply voltage on the terminal block of the outdoor unit Is the...

Page 62: ...Heat sink temperature trouble No Yes No No Yes Yes No No Yes Yes Is 5110 displayed when restarted Does the fan rotate during compressor operation Is there any obstacle which blocks an airflow around the heat sink Is there any abnormality such as disconnection looseness or breakage Is the resistance normal Refer to the diagnosis of check code 5110 Refer to the diagnosis of check code 4400 Replace t...

Page 63: ...placing boards Diagnosis Remedy 4250 U6 Power module trouble or overcurrent trouble Yes Yes Yes Yes No No No No Is the stop valve liquid gas fully open Is the power supply voltage normal Are the wirings normal Does it operate normally Open the stop valve liquid gas fully Ensure power supply from facility Connect the compressor wiring U V and W phase properly then turn the power back ON Replace the...

Page 64: ...there any abnormality such as disconnection looseness or breakage Is the voltage normal Replace the outdoor multi controller circuit board Replace the defective fan motor Connect the wiring connector properly Replace it in the case of breakage Replace the outdoor multi controller circuit board Replace the defective fan motor Check the fuse on the outdoor multi controller circuit board Check the fa...

Page 65: ...rmistor TH4 open short The black square indicates a switch position Detected in outdoor unit No Yes Yes Yes No No Is there any abnormality such as disconnection looseness or breakage Is the detected resistance normal Is the detected temperature normal Connect the wiring connector properly Replace the connector in the case of breakage Replace the thermistor Replace the outdoor multi controller circ...

Page 66: ...rature thermistor TH6 open short The black square indicates a switch position Detected in outdoor unit No Yes Yes Yes No No Is there any abnormality such as disconnection looseness or breakage Is the detected resistance normal Is the detected temperature normal Connect the wiring connector properly Replace it in the case of breakage Replace the thermistor Replace the outdoor multi controller circu...

Page 67: ...or liquid pipe temperature thermistor TH3 open short The black square indicates a switch position SW1 Setting ON OFF Display on LED1 2 Unit 99 9 999 9 C 4 1 2 5 6 7 8 3 No Yes Yes Yes No No Is there any abnormality such as disconnection looseness or breakage Is the detected resistance normal Is the detected temperature normal Connect the wiring connector properly Replace it in the case of breakage...

Page 68: ...No Yes Yes Yes No No Is there any abnormality such as disconnection looseness or breakage Is the detected resistance normal Is the detected temperature normal Connect the wiring connector properly Replace it in the case of breakage Replace the thermistor Replace the outdoor multi controller circuit board Malfunction of thermistor circuit No abnormality A connector contact failure is suspected Chec...

Page 69: ... Yes Yes No No Is there any abnormality such as disconnection looseness or breakage Is the detected resistance normal Is the detected temperature normal Connect the wiring connector properly Replace it in the case of breakage Replace the thermistor Replace the outdoor multi controller circuit board Malfunction of thermistor circuit No abnormality A connector contact failure is suspected Check the ...

Page 70: ...es Yes Yes No No Yes No Is there any abnormality such as disconnection looseness or breakage Is the detected resistance normal Is the detected temperature normal Connect the wiring connector properly Replace it in case of breakage Replace the thermistor Replace the outdoor multi controller circuit board Malfunction of thermistor circuit No abnormality A connector contact failure is suspected Check...

Page 71: ...roller circuit board Diagnosis of defects Make sure to turn the power OFF before connecting disconnecting any connectors or replacing boards Diagnosis Remedy The black square indicates a switch position 63HS High pressure sensor SW1 Setting ON OFF Display on LED1 2 Unit 99 9 999 9 kgf F 4 1 2 5 6 7 8 3 No Yes Yes Yes No No Is there any abnormality such as disconnection looseness or breakage Is the...

Page 72: ...before connecting disconnecting any connectors or replacing boards Diagnosis Remedy The black square indicates a switch position 63LS Low pressure sensor No Yes Yes No No Yes Is there any abnormality such as disconnection looseness or breakage Is the detected internal pressure normal Is the detected pressure normal Connect the wiring connector properly Replace it in the case of breakage Check the ...

Page 73: ...tors or replacing boards Diagnosis Remedy No No Yes Yes Does it satisfy the condition 1 in the lower right Is there any abnormality such as disconnection or looseness The power supply voltage is decreased or abnormal Check the power supply facility Connect the compressor wiring properly Replace the outdoor power circuit board Malfunction of current sensor circuit Check the input current at the tim...

Page 74: ...Remedy 6600 A0 Duplex address error No Yes Yes No Is there any unit with the same address Does it operate normally Correct the address and turn the power OFF of indoor outdoor unit Fresh Master or Lossnay simultaneously for 2 minutes or more then turn the power back ON Malfunction of sending receiving circuit on indoor outdoor unit is suspected Check the transmission pulse and noise on transmissio...

Page 75: ...s of defects Make sure to turn the power OFF before connecting disconnecting any connectors or replacing boards Diagnosis Remedy 6602 A2 Transmission processor hardware error Yes Yes No No A wiring work was performed while the power OFF Does it operate normally If the wiring work was performed while the power ON turn the power OFF of indoor outdoor unit Fresh Master or Lossnay simultaneously for 2...

Page 76: ...ransmission from to control system and centralized control system Diagnosis of defects Make sure to turn the power OFF before connecting disconnecting any connectors or replacing boards Diagnosis Remedy 6603 A3 Transmission bus BUSY error No Yes Yes Yes No No Is the transmission line miswired Is the transmission line miswired Does it operate normally Correct the wiring then turn the power back ON ...

Page 77: ... sure to turn the power OFF before connecting disconnecting any connectors or replacing boards Diagnosis Remedy 6606 A6 Signal communication error with transmission processor Yes No Does it operate normally Replace the controller Defect of error source controller There is no abnormality on the AC unit It might be caused by an external noise so check the transmission line to remove the factor s Tur...

Page 78: ...circuit on indoor outdoor unit Disconnection of the connectors on the circuit board The cause of displayed address and attribute is on the indoor unit side An abnormality detected by the remote controller if receiving no ACK when sending data from the remote controller to the indoor unit While operating with multi refrigerant system indoor units an abnormality is detected when the indoor unit tran...

Page 79: ...abnormality detected by the indoor unit if receiving no ACK when the indoor unit transmit signal to the Lossnay An abnormality is detected when the indoor unit transmits signal to Lossnay while the Lossnay is turned OFF While the indoor unit is operating with the other refrigerant Lossnay an abnormality is detected when the indoor unit transmits signal to the Lossnay while the outdoor unit with th...

Page 80: ...hether the correct kind of transmission line is used or not Correct it within the tolerance then perform the procedure 1 Connect the transmission line properly then perform the procedure 1 Is the abnormality replicated Is it set properly There is no abnormality on the AC unit It might be caused by an external noise so check the transmission line to remove the factor s Set the address properly then...

Page 81: ...ess attribute belongs to Continued from the previous page Defective outdoor controller board repeater circuit on the outdoor unit is suspected Replace the outdoor controller board one by one then check for normal operation Delete the unnecessary address using a manual setting function on the remote controller Only for operating in a system with the Fresh Master Lossnay is connected or in a multi r...

Page 82: ...ards Diagnosis Remedy No response frame error Yes Yes Yes Yes No No No No Does it operate normally The transmission line is connected properly It is not exceeding the tolerance Is correct kind of transmission line used Replace the controller board Defect of the controller which the displayed address attribute belong to Connect the transmission line properly Correct it within the tolerance Replace ...

Page 83: ...emote controller transmitting error caused by noise interference Diagnosis of defects Make sure to turn the power OFF before connecting disconnecting any connectors or replacing boards Diagnosis Remedy No Yes No Yes Chart 1 of 2 No No No Yes Yes No Yes Yes Is the check code 6831 or 6834 still displayed Is there only 1 remote controller set as the main controller Does Please Wait disappear within 6...

Page 84: ...eive error Chart 2 of 2 No Yes Is the wiring connected properly meeting the condition Connect the wiring properly as specified in the chapter Electrical Work in the indoor unit Installation Manual Refer to the chapter Electrical Work Continued from the previous page No abnormality It might be caused by an external noise so check the transmission line to remove the factor s 84 OCH760 ...

Page 85: ... Continue to the next page No Yes No Yes No Yes No Yes Yes Check the remote controller for main sub setting Conduct the Remote Controller Diagnosis more than 2 times Is the check code 6832 or 6833 still displayed Is there only 1 remote controller set as the main controller Set one remote controller to main remote controller and the other to sub Disconnect and reconnect the connector CN3A then turn...

Page 86: ...end error Chart 2 of 2 No Yes No abnormality It might be caused by an external noise so check the transmission line to remove the factor s Is the wiring connected properly meeting the condition Connect the wiring properly as specified in the chapter Electrical Work in the indoor unit Installation Manual Refer to the chapter Electrical Work Continued from the previous page 86 OCH760 ...

Page 87: ... disconnecting any connectors or replacing boards Diagnosis Remedy 7100 EF Total capacity error No Yes Yes No No Yes Is it set properly Is it set properly Is the total under 130 of outdoor unit capacity Check the capacity code switch SW2 on the indoor controller board on the connected indoor unit Check the model selection switch SW4 on the outdoor multi controller circuit board of the outdoor unit...

Page 88: ...When connecting via branch box P15 to P50 model code 4 to 9 Diagnosis of defects Make sure to turn the power OFF before connecting disconnecting any connectors or replacing boards Diagnosis Remedy 7101 EF Capacity code error Yes No Is it set properly Set the switch properly The model code of the connected indoor unit can be displayed by an operation of SW1 on the outdoor unit Check the model selec...

Page 89: ...Diagnosis of defects Make sure to turn the power OFF before connecting disconnecting any connectors or replacing boards Diagnosis Remedy 7102 EF Connecting unit number error Yes No No Yes Is an indoor unit connected Does it exceed the limit Connect indoor unit Connect less number of units than the limit The model code of the connected indoor unit can be displayed by an operation of SW1 on the outd...

Page 90: ...ce the indoor controller board Check whether the indoor unit address is set in 00 or in the range of 01 to 50 Branch box Yes No Is the address setting correct Set the address properly then turn the power OFF of indoor outdoor unit Fresh Master Lossnay and remote controller simultaneously for 2 minutes or more and turn the power back ON Replace the branch box controller board Check whether the bran...

Page 91: ...r Lossnay and remote controller simultaneously for 2 minutes or more and turn the power back ON Replace the M NET RC sub Check whether the M NET RC sub address is set in 000 or in the range of 151 to 200 Yes No Is the address setting correct Set the address properly then turn the power OFF of indoor outdoor unit Fresh Master Lossnay and remote controller simultaneously for 2 minutes or more and tu...

Page 92: ...FF before connecting disconnecting any connectors or replacing boards Diagnosis Remedy 7130 EF Incompatible unit combination error No Is the indoor unit authorized to connect with the outdoor unit Replace the indoor unit s to the connectable one Refer to the service manual of the outdoor unit or the connected indoor unit for the authorized combination Yes No Yes Check whether the model selection s...

Page 93: ...cally change over to set value by time or piping temperature at thermostat ON Fan stops during heating operation Heat Defrost The fan stops during defrosting Fan does not stop while operation has been stopped Light out Fan runs for 1 minute after stopping to exhaust residual heat only in heating No setting of fan while start SW has been turned on Heat Standby Ultra low speed operation for 5 minute...

Page 94: ...1 ON OFF from outdoor unit ON OFF Any time after the power is turned ON Initial settings 2 Mode setting Heating Cooling SW2 SW4 SW8 SW9 Model Switch 1 6 MODEL SELECTION Before the power is turned ON Initial settings Set for each capacity SW5 Function switch 1 Initial settings 2 Change the indoor unit s LEV opening at startup Enable Normal Can be set when off or during operation To set the LEV open...

Page 95: ...y setting the Pdm higher during HEAT operation Power consumption is raised due to a higher frequency The performance would not be raise at the maximum operating frequency 7 Switching 1 the target evaporation temperature ETm Enable Normal To raise reduce the performance by changing the target ETm during COOL operation Switch to raise the performance raises the performance Switch to reduce the perfo...

Page 96: ... OFF ON OFF ON OFF OFF ON OFF ON ON 100 75 50 0 Normal Stop A Distant control board B Relay circuit C External output adapter PAC SA88HA E D Outdoor unit control board A Remote control panel B Relay circuit C External input adapter PAC SC36NA E D Outdoor unit control board E Relay power supply F Procure locally G Maximum 10 m A Remote control panel B Relay circuit C External input adapter PAC SC36...

Page 97: ... with a multimeter At the ambient temperature 20 C Normal Abnormal 1725 172 5 Ω Open or short Motor for compressor MC Measure the resistance between the terminals with a multimeter Winding temperature 20 C Normal Abnormal 0 237 0 012 Ω Open or short Solenoid valve coil Bypass valve SV1 Oil return valve SV3 Measure the resistance between the terminals with a multimeter At the ambient temperature 20...

Page 98: ...er is OFF disconnect the fan motor connector CNF1 2 3 When 5 minutes have passed since turning ON the breaker turn SW7 1 ON 4 Check the voltage of the outdoor multi controller circuit board Measure the voltage in the outdoor controller circuit board TEST POINT 1 VDC between 1 and 4 of the fan connector 310 340 VDC 3 phase VDC between 1 and 4 of the fan connector 290 330 VDC when PAM stops 380 VDC ...

Page 99: ...57 2 Rt 7 465exp 4057 273 t 393 1 1 20 C 250 kΩ 30 C 160 kΩ 40 C 104 kΩ 50 C 70 kΩ 60 C 48 kΩ 70 C 34 kΩ 80 C 24 kΩ 90 C 17 5 kΩ 100 C 13 0 kΩ 110 C 9 8 kΩ High temperature thermistor Thermistor Compressor TH4 0 10 20 30 40 50 20 10 0 10 20 30 40 50 Temperature C Resistance k 500 400 300 200 100 0 25 50 75 100 120 Temperature C Resistance k 0 C 180 kΩ 25 C 50 kΩ 50 C 17 kΩ 70 C 8 kΩ 90 C 4 kΩ Ther...

Page 100: ... pressure on the self diagnosis LED1 2 1 When the pressure displayed on self diagnosis LED1 2 is between 0 and 0 098 MPaG 14 PSIG the high pressure sen sor has a problem 2 When the pressure displayed on self diagnosis LED1 2 is approximately 5 0 MPaG 725 PSIG the control board has a problem 4 Remove the high pressure sensor from the control board and short circuit between the pin 2 and pin 3 conne...

Page 101: ... the self diagnosis LED1 2 is between 0 and 0 098 MPaG 14 PSIG the low pressure sensor has a problem 2 When the pressure displayed on self diagnosis LED1 2 is approximately 1 7 MPaG 247 PSIG the control board has a problem 4 Remove the low pressure sensor from the control board and short circuit between the pin 2 and pin 3 connectors 63LS to check the pressure with the self diagnosis LED1 2 1 When...

Page 102: ...TEST POINT2 Voltage between pins of C82A 15 VDC Same as CNF1 2 5 4 VSP Voltage between pins of C515 and C516 0 VDC when stopped 1 6 5 VDC when operated Same as CNF1 2 6 4 CNF1 2 Connect to fan motors 1 4 310 340 VDC 5 4 15 VDC 6 4 0 6 5 VDC 7 4 15 VDC when stopped 0 15 VDC pulse when operated VDC TEST POINT1 Voltage between pins of C510 310 340 VDC Same as CNF1 2 1 4 VFG TEST POINT4 Voltage betwee...

Page 103: ...2 Connect to the outdoor controller circuit board CN2 1 5 Power circuit board Transmitting signal to the controller board 0 5 VDC 2 5 Zero cross signal 0 5 VDC 3 4 Not used 6 5 15 VDC 7 5 15 VDC 5 1 2 6 7 TBU TBV TBW Connect to the compressor MC Voltage among phases 10 400 VAC L3 N1 L1 P1 L2 TAB connec tor on X52CA Connect to the RS resistor CN6 Thermistor Heat Sink TH8 TBL3 TBL2 TBL1 Connect to t...

Page 104: ...power circuit board CN2 Connect to the outdoor multi controller board CN102 1 2 24 30 VDC 3 4 24 30 VDC CN1 Connect to the outdoor noise filter circuit board CNAC1 1 3 220 240 VAC EM1 Connect to the electrical parts box ...

Page 105: ...he outdoor multi controller circuit board CNDC Outdoor noise filter circuit board E3 Connect to the electrical parts box E2 Connect to the electrical parts box CN52 Connect to the outdoor multi controller circuit board CN52 CNL Connect to the DCL2 CNAC2 230 VAC Connect to the outdoor multi controller circuit board CNAC EI Connect to the electrical parts box CNAC1 230 VAC Connect to the M NET power...

Page 106: ...nt interception abnormality delay 10 01010000 Abnormality delay display 3 63LS abnormality delay TH2 abnormality delay 4 way valve abnormality delay Delay caused by closed valve in cooling mode Power module abnormality delay TH6 abnormality delay Current sensor open short delay Delay of failure in 12 VDC power supply circuit on power circuit board 11 11010000 Abnormality delay history 1 High press...

Page 107: ...t no 3 min delay no Light on light off 38 01100100 External connection status CN3N1 3 input CN3N1 2 input CN3S1 2 input CN3D1 3 input CN3D1 2 input Input light off No input light on 39 11100100 Communication demand capacity 0 255 Display of communication demand capacity 40 00010100 Number of compressor ON OFF 0000 9999 unit x10 Display a count of compressor operation stop 41 10010100 Compressor op...

Page 108: ...fan control steps target 68 00100010 Indoor LEV Opening pulse No 1 to 30 units 0 2000 pulse Address and display data are alternately displayed every second Pressing SWP2 changes the displayed unit in ascending order it returns to No 1 after No 30 69 10100010 High pressure sensor Pd 99 9 999 9 Kgf cm Display of detected data of outdoor unit sensors and thermistors 70 01100010 TH4 Compressor Td data...

Page 109: ... alternately displayed every second Pressing SWP2 changes the displayed unit in ascending order it returns to No 1 after No 30 89 10011010 High pressure sensor data at time of abnormality delay 99 9 999 9 Kgf cm Display of data from high pressure sensor all thermistors and SC SH at time of abnormality delay 90 01011010 TH4 Compressor sensor data at time of abnormality delay 99 9 999 9 C 91 1101101...

Page 110: ...bnormality 0 15 Display of fan step number at time of abnormality 108 00110110 Detailed and latest error history UP 4220 Failure in 12 VDC power supply circuit on power circuit board Over current abnormality Flagging the latest history of UP error 109 10110110 IC LEV opening pulse at time of abnormality No 1 to 30 units 0 2000 pulse Address and display data are alternately displayed every second P...

Page 111: ...ed firmly it may cause heating or fire Be sure to use the appropriate type of overcurrent protection switch Note that generated overcurrent may include some amount of direct current Caution Some installation site may require attachment of an earth leakage breaker If no earth leakage breaker is installed it may cause an electric shock Do not use anything other than breaker and fuse with correct cap...

Page 112: ...D L N S1 S2 S3 S1 S2 S3 S1 S2 S3 C L N S1 S2 S3 S1 S2 S3 S1 S2 S3 C D E L N NO N 220 230 240 V 50 Hz A B A B D L N S1 S2 S3 S1 S2 S3 S1 S2 S3 C D When power is supplied to branch box from the outdoor unit When power is supplied to outdoor unit and branch box separately Schematic Drawing of Wiring When using a Branch Box and CITY MULTI series indoor unit example E L N Note The CITY MULTI series ind...

Page 113: ...ring and connections 2 The wire size is the minimum value for metal conduit wiring The power cord size should be 1 rank thicker consideration of voltage drops Make sure the power supply voltage does not drop more than 10 wiring requirements should adhere to the wiring regulations of the region 4 Power supply cords of parts of appliances for outdoor use shall not be lighter than polychloroprene she...

Page 114: ... the length exceeds 10 m use a cable with the same specifications as transmission line wiring 3 MA Remote control cables Type of remote control cable Sheathed 2 core cable unshielded CVV Cable diameter 0 3 to 1 25 mm2 0 75 to 1 25 mm2 Remarks Within 200 m Connected with simple remote controller 9 4 2 Wiring examples Controller name symbol and allowable number of controllers Name Symbol Allowable n...

Page 115: ...ries indoor unit CITY MULTI series indoor unit CITY MULTI series indoor unit CITY MULTI series indoor unit CITY MULTI series indoor unit MA RC MA RC Branch Box A control indoor unit MA RC A control indoor unit MA RC A control indoor unit MA RC 0 3 1 25 mm2 0 75 1 25 mm2 MA RC cable Outdoor unit Pull box MA RC Breaker for Wiring and Current Leakage Breaker for Wiring and Current Leakage 1 25 mm2 or...

Page 116: ... following formulas to calculate the electrical characteristics before applying for a capacity agreement with the local electric power company 9 7 1 Obtaining the electrical characteristics of the Power Multi series system 1 Procedure for obtaining total power consumption The power consumption of the outdoor unit will vary depending on the total capacity of the selected indoor units 2 Method of ob...

Page 117: ...e the additional charge using the liquid pipe size and length of the extended piping Calculate the additional refrigerant charge using the procedure shown to the right and charge with the additional refrigerant For amounts less than 0 1 kg round up the calculated additional refrigerant charge For example if the calculated charge is 15 92 kg round up the charge to 16 0 kg ø9 52 ø12 7 ø6 35 ø9 52 ø9...

Page 118: ...to First Branch Out door Unit Piping Diameter 1 Section From Outdoor Unit to First Branch A 2 Sections From Branch to Indoor Unit a b c d e f 2 Refrigerant Piping Diameter In Section From Branch to Indoor Unit Indoor Unit Piping Diameter Each Section of Piping Branch header 4 branches CMY Y64 G E Branch header 8 branches CMY Y68 G E Additional refrigerant charge Liquid pipe Gas pipe Model number 1...

Page 119: ...frigerant Piping Diameter In Section From Branch to Branch B C D 2 Refrigerant Piping Diameter In Section From Branch to Indoor Unit Indoor Unit Piping Diameter a b c d e mm Model number Liquid pipe Gas pipe 10 50 ø6 35 ø12 7 63 140 ø9 52 ø15 88 200 ø9 52 ø19 05 250 ø9 52 ø22 2 L The farthest piping length from the outdoor unit to an indoor unit ø12 7 when connecting the indoor unit for PEFY P200 ...

Page 120: ...a12 80 m Piping length between outdoor unit and branch boxes c1 c2 b1 b2 b3 95 m Farthest branch box from the first joint c2 b3 30 m Farthest piping length after branch box R a12 25 m Total piping length between branch boxes and indoor units a1 a2 a3 a4 a5 a6 a7 a8 a9 a10 a11 a12 145 m Permissible height difference one way In indoor outdoor section H 1 H 50 m In case of outdoor unit is set higher ...

Page 121: ...with liquid pipes and for use with gas pipes Branch joint Branch header 4 branches Branch header 8 branches CMY Y62 G E CMY Y64 G E CMY Y68 G E Select Each Section of Refrigerant Piping 1 Section From Outdoor Unit to Branch box or Branch header A to E Each Section of Piping 2 Sections From Branch box or Branch header to Indoor Unit a to j Select the size from the table to the right 1 Refrigerant P...

Page 122: ...G E CMY Y64 G E CMY Y68 G E Select Each Section of Refrigerant Piping 1 Section From Outdoor Unit to Branch box or Branch header A to E Each Section of Piping 2 Sections From Branch box or Branch header to Indoor Unit a to k Select the size from the table to the right 1 Refrigerant Piping Diameter In Section From Outdoor Unit to Branch box or Branch header Outdoor Unit Piping Diameter A mm B to E ...

Page 123: ...rant Piping 1 Section From Outdoor Unit to Branch box or Branch header A to G Each Section of Piping 2 Sections From Branch box or Branch header to Indoor Unit a to o Select the size from the table to the right 1 Refrigerant Piping Diameter In Section From Outdoor Unit to Branch box or Branch header Outdoor Unit Piping Diameter A mm B to G mm ø12 7 when connecting the indoor unit for PEFY P200 or ...

Page 124: ...the smallest volume Indoor unit All refrigerant of this system will leak out to this room if there is leakage at this indoor unit Direction of refrigerant flow Outdoor unit Branch box Maximum concentration Maximum refrigerant concentration of R410A of a room is 0 44kg K accordance with ISO 5149 1 To facilitate calculation the maximum concentration is expressed in units of kg K kg of R410A per K IS...

Page 125: ...ove all the following connectors from multi controller board Diagram symbol in the connector housing Fan motor CNF1 CNF2 Thermistor HIC pipe TH2 Thermistor Outdoor liquid pipe TH3 Thermistor Compressor TH4 Thermistor Suction pipe Ambient Outdoor TH6 7 High pressure switch 63H High pressure sensor 63HS Low pressure sensor 63LS 4 way valve 21S4 Bypass valve SV1 Oil return valve SV3 Linear Expansion ...

Page 126: ... the clamps and clips on the buttom and the side of the electrical parts box See Photo 6 8 Pull out the thermistor Ambient TH7 from the sensor holder See Photo 7 9 Pull out the thermistor Suction pipe TH6 from the sen sor holder See Photo 8 Note When replacing thermistor Suction pipe TH6 or Ambient TH7 replace them together since they are combined together Electrical parts box Clamps Photo 8 Lead ...

Page 127: ...n the clamp or band for the lead wire of the electrical parts box and the separator 8 Pull out the thermistor Outdoor liquid pipe TH3 from the sensor holder See Photo 9 Note Attach the band to the same position when loosening it 4 way valve coil fixing screw 8 Removing the 4 way valve 1 Remove the service panel See Photo 1 2 Remove the top panel See Photo 1 3 Remove the cover panel front See Photo...

Page 128: ...emove the cover panel rear See Photo 1 5 Remove the side panel R See Photo 1 6 Remove the electrical parts box See Photo 5 7 Remove the linear expansion valve coil See Photo 11 8 Recover refrigerant 9 Remove the welded part of linear expansion valve Low pressure sensor 63LS Linear expan sion valve coil LEV A Linear expansion valve High pressure switch 63H Bypass valve coil fixing screw Linear expa...

Page 129: ...n remove the compressor Note Recover refrigerant without spreading it in the air Photo 13 Compressor MC Valve bed Valve bed fixing screw Valve bed fixing screws Compressor fixing nut 14 Removing the accumulator 1 Remove the service panel See Photo 1 2 Remove the top panel See Photo 1 3 Remove the cover panel front See Photo 1 4 Remove the cover panel rear See Photo 1 5 Remove the side panel R See ...

Page 130: ...orm its function except for the ON OFF button 6 ON OFF lamp This lamp lights up in green while the unit is in operation It blinks while the remote controller is starting up or when there is an error 7 Function button F1 Main display Press to change the operation mode Menu screen The button function varies with the screen 8 Function button F2 Main display Press to decrease temperature Main menu Pre...

Page 131: ...ool Set temp Auto Basic mode Fri Cool Mode Temp Fan Set temp Auto 2 1 5 6 7 8 9 0 1 3 9 4 2 3 4 5 6 7 2 1 5 Display 4 3 8 4 Appears when the Weekly timer is enabled 5 Appears while the units are operated in the energy saving mode Will not appear on some models of indoor units 6 Appears while the outdoor units are operated in the silent mode 7 Appears when the built in thermistor on the remote cont...

Page 132: ...N OFF timer Auto return Clock Main Sub Temp range Auto OFF timer Schedule Daylight saving time Clock Administrator password Operation locked 3D i See sensor Horizontal air direction High power Vane 3D i See Vent Lossnay Comfort Timer Energy saving Basic setting Display setting Operation setting Wi Fi interface setting Restriction Weekly timer OU silent mode Timer menu Main display Display details ...

Page 133: ...ame input Function setting Lossnay Rotation setting Error history Maintenance password Dealer information input Error information Test run menu Maintenance information Filter information Cleaning Settings menu Check menu Other menu Auto descending panel Descending operation Self check Descending adjustment Remote controller check Continue from the previous page Not all functions are available on a...

Page 134: ...elect the desired silent level from Normal Middle and Quiet Night setback 1 Use to make Night setback settings Select Yes to enable the setting and No to disable the setting The temperature range and the start stop times can be set Energy saving Restriction Temp range 2 Use to restrict the preset temperature range Different temperature ranges can be set for different operation modes Operation lock...

Page 135: ...turing number contact information dealer s phone number can be displayed The model name manufacturing number and contact information need to be registered in advance to be displayed Filter information Use to check the filter status The filter sign can be reset Cleaning Auto descending panel Use to lift and lower the auto descending panel Optional parts Service Test run Select Test run from the Ser...

Page 136: ...oor unit the indoor unit may beep twice as the unit is performing the initial automatic check The indoor unit beeps to confirm that the signal transmitted from the remote controller has been received Signals can be received up to approximately 7 meters in a direct line from the indoor unit in an area 45 to the left and right of the unit However illumination such as fluorescent lights and strong li...

Page 137: ...ting Auto Set Temperature buttons Weekly timer ON OFF button Set Time button Sets the time Airflow button Changes up down airflow direction Mode button Changes operation mode Timer ON button Timer OFF button OFF ON button Fan Speed button Changes fan speed SET SEND button CANCEL button Up Down buttons Menu button i see button Reset button Remote controller display Transmission area 3D i See sensor...

Page 138: ...perature and the relative humidity 4 LED Indicator The LED indicator indicates the operation status in different colors The LED indicator lights up during normal operation lights off when units are stopped and blinks when an error occurs 5 Touch panel Backlit LCD The touch panel shows the operation settings screen When the backlight is off touching the panel turns the backlight on and it will stay...

Page 139: ...el name and serial number will appear The model name and serial number will appear only if the informa tion have been registered Press the F1 or F2 button to go to the next page When an error occurs the following screen will appear Check the error status stop the operation and consult your dealer Contact information dealer s phone number will appear if the information has been registered 2 Press t...

Page 140: ...formation Filter information Cleaning While no errors are occurring page 2 2 of the error information can be viewed by selecting Error information from the Maintenance menu Errors cannot be reset from this screen Checking the error information F1 F2 F3 F4 ...

Page 141: ...ce password is required 3 If the password matches the Service menu will appear The type of menu that appears depends on the connected indoor units type A screen will appear that indicates the setting has been saved Navigating through the screens To go back to the Service menu button To return to the previous screen button Note The initial maintenance password is 9999 Change the default password as...

Page 142: ...through the operation modes in the order of Cool and Heat Check the auto vane with the F1 F2 F3 buttons Press the button to return to Test run operation Press the button When the test run is completed the Test run menu screen will appear The test run will automatically stop after 2 hours The function is available only for the model with vanes Test run operation Auto vane check Press the button and...

Page 143: ... from the unit 6 Press the VANE button and check whether the auto vane operates properly 7 Press the ON OFF button to stop the test run Note Point the remote controller towards the indoor unit receiver while following steps 2 to 7 It is not possible to run in FAN DRY or AUTO mode 1 A B 2 3 12 4 3 PAR SL100A E 1 Press the button 1 to stop the air conditioner If the weekly timer is enabled is on pre...

Page 144: ...o ON status Except the set temperature normal operation functions are accessible during test run c By selecting the address of another indoor unit the liquid pipe temperature of the selected unit can be monitored d The test run will automatically end in two hours When AHC is controlled from the controller To monitor the operating status of AHC touch the button on the Test run screen and access the...

Page 145: ...onal settings press the button to return to the screen shown in the above step Set the function numbers for other indoor units by following the same steps Settings menu Service menu Function setting Lossnay Cursor 12 5 FUNCTION SETTING 12 5 1 PAR 4xMAA x represents 0 or later Select Function setting and press the button Select Setting from the Service menu and press the button 1 Select Service fro...

Page 146: ...s remote controller toward the receiver of the indoor unit and press the h 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 wireless remote controller toward the receiver of the indoor unit and press the min button Notes 1 If a unit number that cannot be recognized by the unit is entered 3 beeps of 0 4 ...

Page 147: ...de number B Fig 3 Direct the wireless remote controller toward the receiver of the indoor unit and press the button Current setting number 1 1 beep 1 second 2 2 beep 1 second each 3 3 beep 1 second each 4 Selecting the setting number Use the button to change the Setting number C Fig 4 Direct the wireless remote controller toward the receiver of the indoor unit and press the button 5 To select mult...

Page 148: ...ck with the F1 or F2 button and press the button 3 16 error history records will appear 4 records are shown per page and the top record on the first page indicates the latest error record To delete the error history press the F4 button Delete on the screen that shows error history A confirmation screen will appear asking if you want to delete the error history Press the F4 button OK to delete the ...

Page 149: ... view the Self check screen With the F1 or F2 button enter the M NET address and press the button Check code unit number attribute and indoor unit de mand signal ON OFF status at the contact will appear will appear if no error history is available 3 Resetting the error history Press the F4 button Reset on the screen that shows the error history A confirmation screen will appear asking if you want ...

Page 150: ...NET address B indoor unit and the number of blinks of the OPERATION INDICATOR lamp check is completed f 12 7 3 PAR SL100A E Procedure 1 Press the CHECK button twice CHECK lights and refrigerant address 00 blinks Check that the remote controller s display has stopped before continuing 2 Press the TEMP buttons Select the refrigerant address of the indoor unit for the self diagnosis Note Set refriger...

Page 151: ...32 There is noise on the transmission line or the indoor unit or another remote controller is faulty Check the transmission line and the other remote controllers NG ALL0 ALL1 Send receive circuit fault The remote controller needs replac ing ERC The number of data errors is the discrepancy between the number of bits in the data transmitted from the remote controller and that of the data that was ac...

Page 152: ... with a refrigerant system which includes branch box It is necessary to perform group settings and Interlocked LOSSNAY at making group settings of different refrigerant systems multiple outdoor unit A Group settings Enter the indoor unit controlled by the remote controller check the content of entries and clear entries etc B Interlocked LOSSNAY Used to set the linked operation of a Lossnay unit HO...

Page 153: ...e unit whose address was set in the Add 1 section 3 To delete the interlock settings After taking Step 2 above select the address to be deleted in the Add 2 section and then touch the Del button 1 Select an address in the Address field 2 Touch the Conf button to search for the interlocked units The results will appear in the left column When multiple units are found the addresses that do not fit o...

Page 154: ...ht 2021 MITSUBISHI ELECTRIC CORPORATION Published May 2021 No OCH760 Made in Japan Specifications are subject to change without notice HEAD OFFICE TOKYO BUILDING 2 7 3 MARUNOUCHI CHIYODA KU TOKYO100 8310 JAPAN ...

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