Mitsubishi Electronics OC366 manual

TECHNICAL & SER VICE MANUAL SPLIT -TYPE, HEA T PUMP AIR CONDITIONERS CONTENTS 1. TECHNICAL CHANGES ................................... 3 2. SAFETY PRECAUTION .................................... 6 3. OVERVIEW OF UNITS ...................................... 9 4. SPECIFICA TIONS ........................................... 11 5. DA T A ...........[...]

2 Revision: "14. RoHS P ARTS LIST " has been modi fi ed on page 98. Page Revising point Service Ref. Incorrect Correct 98 STRUCTURAL P ARTS No. 1 SIDE P ANEL(L) PUMY -P36NHMU(-BS) PUMY -P48NHMU 2 (-BS) T7W E03 662 T7W E06 662 98 STRUCTURAL P ARTS No. 4 BASE ASSY PUMY -P36NHMU(-BS) PUMY -P48NHMU 2 (-BS) R01 E31 686 R01 E26 686 98 STRUCTUR[...]

3 PUMY -P36NHMU PUMY -P36NHMUR1 PUMY -P36NHMU-BS PUMY -P36NHMUR1-BS PUMY -P48NHMU 2 PUMY -P48NHMUR3 PUMY -P48NHMU 2 -BS PUMY -P48NHMUR3-BS • THERMIST OR has been changed. (Discharge thermistor → Compressor thermistor) • Compressor has been changed. PUMY -P48NHMU 1 PUMY -P48NHMU 2 PUMY -P48NHMU 1 -BS PUMY -P48NHMU 2 -BS · Compressor (MC) and [...]

4 (4) Determine Fan Airflow setting during Indoor Thermo OFF conditions: a) These settings are done within Indoor DIPSW1-7 and DIPSW1-8, see chart below for options. b) Recommended SW1-7 OFF and SW1-8 ON will determine airflow based on "Setting on the remote controller". Fan speed setting Fan speed setting OFF ON SW1-7 SW1-8 OFF OFF V ery[...]

5 (6) Locally procured wiring A basic connection method is shown. (i.e. interlocked operation with the electric heater with the fan speed setting on high Recommended circuit CN24 CN22 X + X Remote control Board Relay circuit Adapter Indoor unit control board Outdoor unit control board Electr ic Heater power source Electric Heater Red 1 White 2 Dip [...]

6 [1] Cautions for service (1) Perform service after recovering the refrigerant left in unit completely . (2) Do not release refrigerant in the air . (3) After completing service, charge the cycle with specified amount of refrigerant. (4) When performing service, install a filter drier simultaneously . Be sure to use a filter drier for new refriger[...]

7 Gravimeter Unit [3] Service tools Use the below service tools as exclusive tools for R410A refrigerant. 2-2. PRECAUTIONS FOR SAL T PROOF TYPE "-BS" MODEL 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[...]

8 2-3. Cautions for refrigerant piping work New refrigerant R410A is adopted for replacement inverter series. Although the refrigerant piping work for R410A is same as for R22, exclusive tools are necessary so as not to mix with different kind of refrigerant. Furthermore as the working pressure of R410A is 1.6 times higher than that of R22, their s[...]

9 3 OVER VIEW OF UNITS 3-1. UNIT CONSTRUCTION Decorative panel Model Ceiling Ceiling Ceiling Concealed mounted Wall Mounted Concealed 4-way flow 2-way flow 1-way flow built-in Exposed Concealed (Fresh Air)*1 PLFY-P PLFY-P PMFY-P PEFY-P PDFY-P PKFY-P PCFY-P PFFY-P PEFY-P Capacity NCMU-E NBMU-E NLMU-E NBMU-E NMLU-E NMHU-E NMSU-E NMU-E NAMU-E NGMU-E N[...]

10 3-2. UNIT SPECIFICA TIONS (1) Method for identifying MUL TI-S model ■ Indoor unit < When using Model 30 > ■ Outdoor unit <When using model 48 > (2) Operating temperature range Notes D.B. : Dry Bulb T emperature W .B. : Wet Bulb T emperature *1. 10~46°C DB [50~1 15°FDB] : In case of connecting PKFY -P06/P08 type indoor unit. P L[...]

11 4 SPECIFICA TIONS PUMY -P36NHMU(-BS) PUMY -P36NHMUR1(-BS) Cooling Capacity Btu/h *3 *3 *3 *3 *3 *3 *3 *3 36,000 Heating Capacity Btu/h Btu/h/W W/W 40,000 3.22 14.23/15.74 98.4 2.93 12.88/14.24 98.9 11 . 1 8 4.00 Input ( Cool ) kW Input Current ( Cool ) Power factor (Cool) A % % Input ( Heat ) kW Input Current ( Heat ) Power factor (Heat) A EER ([...]

12 PUMY -P48NHMU/NHMU 1 /NHMU 2 /NHMUR3(-BS) Cooling Capacity Btu/h *3 *3 *3 *3 *3 *3 *3 *3 48,000 Heating Capacity Btu/h Btu/h/W W/W 54,000 Input ( Cool ) kW 4.97 Input Current ( Cool ) Power factor (Cool) A % % 24.0/21.7 99.5 Input ( Heat ) kW 4.88 Input Current ( Heat ) Power factor (Heat) A 23.6/21.3 99.5 EER ( Cool ) 9.66 COP ( Heat ) 3.24 Con[...]

13 5 D ATA 5-1. COOLING AND HEA TING CAP ACITY AND CHARACTERISTICS 5-1-1. Method for obtaining system cooling and heating capacity: T o obtain the system cooling and heating capacity and the electrical characteristics of the outdoor unit, first add up the rati ngs of all the indoor units connected to the outdoor unit (see table below), and then use[...]

14 5-2. ST ANDARD CAP ACITY DIAGRAM * Before calculating the sum of total capacity of indoor units, please convert the value following the formula on 5-1-1. 5-2-1. PUMY -P36NHMU(-BS)/ PUMY -P36NHMUR1(-BS) Note) In some combination patterns, numerical value of the heating data may differ slightly . (CAP ACITY : about several hundred Btu/h) Total cap[...]

15 5-2-2. PUMY -P48NHMU/NHMU 1 /NHMU 2 /NHMUR3(-BS) Note) In some combination patterns, numerical value of the heating data may differ slightly . (CAP ACITY : about several hundred Btu/h) Total capacity of Indoor units* Cooling Heating Cooling Heating Cooling Heating Cooling Heating 24 24,000 26,900 2.11 2.32 9.2 10.2 10.2 11.2 25 25,000 28,000 2.2[...]

16 5-3. CORRECTING COOLING AND HEA TING CAP ACITY 5-3-1. Correcting Changes in Air Conditions (1) The performance curve charts (Figure 1, 2) show the ratio by the temperature condition change when the rated capacity (tota l capacity) and the rated input are presumed 1, under standard length (7.6 m [25 ft]) and standard temperature condition. • St[...]

17 (2) Method for Obtaining the Equivalent Piping Length Equivalent length for type P48 = (length of piping to farthest indoor unit) + (0.3 o number of bends in the piping) (m) Length of piping to farthest indoor unit: 80 m [262 ft] 5-3-3. Correction of Heating Capacity for Frost and Defrosting If heating capacity has been reduced due to frost form[...]

18 6 OUTLINES AND DIMENSIONS PUMY -P48NHMU PUMY -P48NHMU-BS PUMY -P48NHMU 1 PUMY -P48NHMU 1 -BS Unit : mm <inch> Min.500mm <19-11/16> Min.500mm <19-11/16> Min.150mm <5-29/32> Min.10mm<3/8> Handle Side Air Intake Front piping cover Rear piping cover Air intake Rear Air Intake Handle Service panel Handle 31<1-7/32>[...]

19 Min.500mm <19-11/16> Min.500mm <19-11/16> Min.150mm <5-29/32> Min.10mm<3/8> Handle Side Air Intake Front piping cover Rear piping cover Air intake Rear Air Intake Handle Service panel Handle 31<1-7/32> 74<2-19/32> 40<1-9/16> Max. 30mm<1-3/16> The diagram below shows a basic example. Explanation of [...]

20 7 WIRING DIAGRAM PUMY -P48NHMU PUMY -P48NHMU-BS PUMY -P48NHMU 1 PUMY -P48NHMU 1 -BS 12 34 56 78 [Example] When the compressor and SV1 are turned during cooling operation. SYMBOL NAME SYMBOL NAME SYMBOL NAME TB1 T erminal Block <Power Supply> TB3 T erminal Block <Transmission> TB7 T erminal Block <Centralized Control> MC Motor f[...]

21 RED WHT BLK MODELS PUMY -P48NHMU SW4 < + 1 MODEL SELECT> ON OFF 123456 1 MF1 4 567 CN2 (WHT) CN4 (WHT) CN51 (WHT) 1 MF2 4 5 6 7 52C (BLK) 3 X505 1 21S4 (GRN) 3 1 SV2 (BLU) 3 1 SV1 (WHT) SS (WHT) 2 1 21 21 2 1 3 1 21S4 SV1 76 5432 1 5 4 3 2 1 21 LED3 SW6 SW2 SW8 SW1 SW7 SW3 SW4 + 1 SW5 SWU2 SWU1 TRANS LED2 88 LED1 88 12 1 21 2 34 CN3D (WHT)[...]

22 12 34 56 78 [Example] When the compressor and SV1 are turned during cooling operation. SYMBOL NAME SYMBOL NAME SYMBOL NAME TB1 Terminal Block <Power Supply> TB3 Terminal Block <Communication Line> TB7 Terminal Block < Centralized Control Line> MC Motor For Compressor MF1,MF2 Fan Motor 21S4 Solenoid Valve<Four-Way Valve> S[...]

23 CNDC (PIN) CNAF (WHT) CN2 (WHT) CN3 (WHT) CN4 (WHT) CN5 (RED) CNAC2 (RED) E I E2 CN5 (RED) CN52C (BLK) CNAC1 (WHT) LO NO L I N I TABP2 TABU TABW TABN2 TABN1 TABV TH8 IPM CE TABN TABP TABP1 TABT DS3 DS2 TABS RED BLU BLU BLU WHT WHT 52C RED RED BLK BLK BLK WHT RED RED RED RED RED WHT YLW YLW P. B. N. F. + + - + BLK BLK WHT WHT W V U RED MC MS 3~ D[...]

24 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 051 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 056 001 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 010 101 1 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 002 102 104 154 11 1 1 1 1 0 1 2 3 4 5 6 7 8 [...]

25 8-2. REFRIGERANT SYSTEM DIAGRAM PUMY -P36NHMU(-BS) PUMY -P36NHMUR1(-BS) PUMY -P48NHMU(-BS) PUMY -P48NHMU 1 (-BS) PUMY -P48NHMU 2 (-BS) PUMY -P48NHMUR3(-BS) Refrigerant Gas pipe <5/8 inch> Refrigerant Liquid pipe <3/8 inch> Check valve<Low pressure> Accumulator Thermistor<Saturation temperature of suction pressure>(TH6) So[...]

26 8-3. SYSTEM CONTROL 8-3-1. Example for the System • Example for wiring control cables, wiring method and address setting, permissible lengths, and the prohibited items are liste d in the standard system with detailed explanation. The explanation for the system in this section : Use one single outdoor unit and multiple outdoor units for M-NET r[...]

27 • Name, Symbol and the Maximum Remote controller Units for Connection Name Symbol Maximum units for connection Outdoor unit OC — Indoor unit IC One OC unit can be connected to 1-6 (P36)/1-8 (P48) IC units M-NET remote controller RC Maximum 2 RC for 1 indoor unit, Maximum 16 RC for 1 OC Permissible Lengths Prohibited items Longest transmissio[...]

28 B. Example of a group operation system with 2 or more outdoor units and a M-NET remote controller . (Shielding wires and address settings are necessary .) Examples of T ransmission Cable Wiring      M1 M2 S M1 M2 S TB7 TB3 IC (51) M1 M2 S TB5 RC (01) IC M1 M2 S TB5 (03) IC M1 M2 S TB5 (02) IC M1 M2 S TB5 (04) IC M1 M2 S TB5 (05) I[...]

29 • Name, Symbol, and the Maximum Units for Connection Permissible Length Prohibited items • Longest length via outdoor units : L 1 +L 2 +L 3 +L 4, L 1 +L 2 +L 3+ L 5, L 1 +L 2 +L 6 +L 7 [ 500 meters [1640 ft] (1.25 mm 2 [AWG16]) • Longest transmission cable length : L 1, L 3 +L 4 , L 3+ L 5 , L 6, L 2 +L 6 , L 7 [ 200 meters (1.25 mm 2 [A W[...]

30 C. Example of a MA remote controller system (address setting is not necessary .) NOTE : In the case of same group operation, need to set the address that is only main indoor unit. Example of wiring control cables Wiring Method and Address Setting • 1 remote controller for each indoor unit. 1. Standard operation 2. Operation using 2 remote cont[...]

31 Permissible Lengths Prohibited items Longest transmission cable length L 1 + L 2 [ 200 m [656 ft] (1.25 mm 2 [A WG16]) MA remote controller cable length R 1 , R 2 [ 200 m [656 ft] (0.3 – 1.25 mm 2 [A WG22 to A WG16]) MA M1 M2 TB5 S1 2 TB15 00 IC AB M1 M2 TB3 S M1 M2 TB7 00 OC S MA M1 M2 TB5 S1 2 TB15 00 IC AB MA M1 M2 TB5 S1 2 TB15 00 IC AB M1[...]

32 D. Example of a group operation with 2 or more outdoor units and a MA remote controller . (Shielding wires and address settings are necessary .) Examples of T ransmission Cable Wiring      M1 M2 S TB7 IC (51) M1 M2 1 2 S TB5 TB15 12 TB15 12 TB15 12 TB15 12 TB15 12 TB15 12 TB15 MA (01) IC M1 M2 S TB5 (03) IC M1 M2 S TB5 (02) IC M1 [...]

33 • Name, Symbol, and the Maximum Units for Connection Permissible Length Prohibited items • Never connect together the terminal blocks (TB5) for transmission wires for indoor units (IC) that have been connected to different outdoor units (OC). • M-NET remote controller and MA remote controller cannot be connected with the indoor unit of the[...]

34 9 TROUBLESHOOTING NOTE 1 : If error code appears on remote controller or remote controller malfunction , refer to “ 9-1-3. Countermeasures for Error During Run”. NOTE 2 : During test run operation 2-hours off timer activates automatically and remaining time is on remote controller and test run stops 2 hours later . NOTE 3 : During test run, [...]

35 9-1-2. Special Function Operation and Settings (for M-NET Remote Controller) • It is necessary to perform “group settings” and “paired settings” 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,[...]

36 (altenating display) "--" will appear in the unit type display location when an address has been cleared normally . "88" will appear in the unit type display location when an abnormality has occurred during clearing. (2) Address check: Refer to section (1) regarding address entry . a) In making group settings: • T urn off t[...]

37 9-1-3. Countermeasures for Error During T est Run • If a problems occurs during test run, a code number will appear in the temperature display area on the remote controller (or LED on the outdoor unit), and the air conditioning system will automatically cease operating. Determine the nature of the abnormality and apply corrective measures. Che[...]

38 Display Abnormal point and detecting method Causes Check points 1 102 1300 1302 1500 High discharging/compressor temperature Abnormal if discharge/compressor temperature thermistor (TH4) exceeds 125  [257°F] or 11 0  [230°F] continuously for 5 minutes. Abnormal if pressure detected by high pressure sensor and converted to saturation temp[...]

39 Display Abnormal point and detecting method Causes Check points Operation mode: When drain pump turns on as float switch detects to be in the water except during cooling/dry mode  Check the drain function.  Check moving part of float switch.  Check the value of resistance with the float switch ON/OFF .  Defective drain Clogged drain [...]

40 Display Abnormal point and detecting method Causes Check points 2502 (Drain sensor model) Drain pump (DP)  Drain sensor thermistor is heated, and when only a fraction of the temperature rise is detected, the system determines abnormality to defer the error to stop operation and changes to protection mode to restart the system in 3 minutes. ?[...]

41 Display Abnormal point and detecting method Causes Check points 2502 (Float switch model)  Check if drain pump works.  Check drain function.  Check moving part of float switch.  Check the value of resistance with the float switch ON/OFF .  Change the indoor controller board.  Malfunction of drain pump  Defective drain Clogge[...]

42 on 2 13 4 5 6 7 8 Overvoltage or voltage shortage Abnormal if any of followings are detected during compressor operation; • Decrease of DC bus voltage to 310V • Instantaneous decrease of DC bus voltage to 200V . • Increase of DC bus voltage to 400V . • Decrease of input current of outdoor unit to 0.5A only if operation frequency is more [...]

43 5101 Display Abnormal point and detecting method Causes Check points Room temperature thermistor (TH21) When controller detects short (high temp.)/open (low temp.) in thermistor during the operation, the operation stops and the operation changes to protect mode of restarting in 3 minutes. If the thermistor does not recover in 3 minutes, the oper[...]

44 5102 Liquid pipe temperature thermistor (TH22) When the thermistor detects short/open during the operation, the operation stops and the operation changes to protect mode of restarting in 3 minutes. If the thermistor does not recover in 3 minutes, the operation stops due to detecting abnormality . In this time, <5102> is displayed. Then, if[...]

45 5103 Gas pipe temperature thermistor (TH23) When the thermistor detects short/open after 3minutes-continuous thermo ON during cooling or dry operation, the operation stops and the operation changes to protect mode of restarting in 3 minutes. If the thermistor does not recover in 3 minutes, the operation stops due to detecting abnormality . In th[...]

46 5106 Outdoor temperature thermistor (TH7) Display Abnormal point and detecting method Causes Check points  Connector (TH7) contact failure  Check whether the connector (TH7) in the multi controller board is connected or not. When controller detects short/open in thermistor during the operation, the outdoor unit stops once and restarts oper[...]

47 5201 Display Abnormal point and detecting method Causes Check points Pressure sensor (63HS) When detected pressure in high-pressure sensor is 1 MPa [145PSIG] or less during the operation, the compressor stops and restarts operation in 3 minutes.  High-pressure sensor failure Check the high-pressure sensor . When the detected pressure is 1 MPa[...]

48 6603 Transmission bus busy error Over error by collision The transmission processor cannot be transmitted since a short cycle voltage of the noise etc. mixes on the transmission line consecutively. Check whether the transmission line of the indoor unit, fresh master, lossnay and remote controller is connected to the outdoor unit terminal board ([...]

49 6607 No ACK (Acknowledgement) Abnormality which controller of the sending side detects when there is no answer (ACK) from other side though data was transmitted once. It is detected 6 times every 30seconds continuously. Factor that does not related to origin Turn off power supply of outdoor unit, indoor unit fresh master and lossnay for 2 minute[...]

50 When the cause of displayed address and attribute is on the remote controller side. When operating with multi refrigerant system indoor units, the indoor units transmits the signal to the remote controller after the other refrigerant system outdoor unit is turned off or turned on again in 2 minutes, and detects abnormality. (The indoor unit dete[...]

51 Transmission repeats the failure by the noise etc. 6608 No response Decline of transmission voltage and signal by transmission line tolerance over Check the transmission wave and noise on the transmission line. Though there was a replay (ACK) of having received signal from the other side, it is the abnormality when the response command does not [...]

52 7105 Address setting error Address setting of the outdoor unit is wrong. Addresses miss setting of the outdoor unit. Check the address setting of the outdoor unit. The address should be set in 000 or 51-100. The outdoor unit is not set in 000 or in the range of 51-100. When the setting is out of the range, reset it, turn off power supply of the [...]

53 Transmission data from remote controller Transmission data on transmission path When the number of data errors is "02": · MA remote controller is equipped with the diagnosis function If the air conditioner cannot be operated from the remote controller, diagnose the remote controller as explained below.  First, check that the power-[...]

54 ON/OFF CENTRALLY CONTROLLED ERROR CODE CLOCK ON OFF °C CHECK CHECK MODE FILTER TEST RUN FUNCTION °C 1Hr. NOT AVAILABLE STAND BY DEFROST FILTER CHECK TEST TEMP. TIMER SET “ ” indicator: Appears when current is carried. (M-NET Remote controller) (1) For M-NET remote controller systems Symptom or inspection code Cause Inspection method and so[...]

55 Even the cooling (heating) operation selection button is pressed, the indoor unit cannot be operated. The auto vane runs freely . Fan setting changes during heating. Fan stops during heating operation. Fan does not stop while operation has been stopped. No setting of fan while start SW has been turned on. Indoor unit remote controller shows “H[...]

56 Outdoor unit Switch SW U1 1s digit SW U2 10ths digit SW1 Digital Display Switching SW2 Function Switching SW5 Function switching SW3 T est run SW4 Model Switching Step Operation in Each Switch Setting ON OFF When to Set Remarks Before turning the power on Before the power is turned on Rotary switch 1 2 3 4 5 6 1 2 1 2 3 4 5 6 7 8 Function 1~8 1~[...]

57 <Initial settings> 1 ON OFF 2 34 567 8 <Initial settings> <Initial settings> 1 ON OFF 23 4 5 6 1 ON OFF 2 Outdoor unit Switch SW6 Function switching SW7 Function switching SW8 Function switching Step Operation in Each Switch Setting ON OFF When to Set Remarks Before turning the power on Before turning the power on During compre[...]

58 CN51 X 5 4 3           Y L 1 : Error display lamp L 2 : Compressor operation lamp X, Y : Relay (Coil standard of 0.9W or less for DC 12V)         CN3N X Y SW1 SW2 1 2 3 X, Y : Relay (DC1mA) SW1 SW2 ON Heating V alidity of SW1 OFF Cooling Invalidity of SW1 SW1 SW2 ON Heating V alidity of SW1 O[...]

59 A1 A2 L3 L2 L1 T3 T2 T1 Parts name Check points Disconnect the connector then measure the resistance with a tester . (At the ambient temperature 10  ~30  [50 ° F~86 ° F]) Thermistor (TH3) <Outdoor pipe> Thermistor (TH4) < Discharge/Compressor > Thermistor (TH6) < Low pressure saturated temperature> Thermistor (TH7) <[...]

60 Notes · High voltage is applied to the connecter (CNF1, 2) for the fan motor . Pay attention to the service. · Do not pull out the connector (CNF1, 2) for the motor with the power supply on. (It causes trouble of the outdoor controller circuit board and fan motor .) Self check Symptom : The outdoor fan cannot turn around.   Check method [...]

61 Check method of multi controller board Normal LED1 LED2 Fuse check Check the fus e on Multi control ler board Did the fuse (F5 00) blow? Re place Multi board and fan motor. *See DC fan check Did the fuse (F 1 and F2 ) blow? C h e c k t h eS V 1a n d2 1 S 4a n dw i r i n g . 7seg LED is lit ? (SW1 : all o ff) 280V to 350V DC? *Check wi ring *Repl[...]

62 Check method of power board Normal Is the vol tage of main inco ming power 208/230V AC ? *Check the breaker a nd power suppl y Is the voltage to the compressor (U-V,U-W and V -W) balanced ? *To check the voltage of the parts on this board with a tester is difficult due to its location. Test points ar e limited. *Check wir ing *Check mod el setti[...]

63 Check method of noise fi lter circuit board Normal Is the voltage of main incoming power 208/230V±10% AC ? *Check the breaker a nd power suppl y Is the voltage of CNAC (RED) on multi board CNAC (RED) 208/230V±1 0% AC? *Check wi ring *Replace nois e filter board Is the voltage of CNDC(P NK) on multi board 280-350V D C? *Check wi ring *Check po[...]

64 Check method of ACTM Normal Is the voltage of main in coming power 208/230V ± -10% AC? *Check the breaker and p ower supply * To check the voltage of the parts on this board with a tester is difficult due to its location. Test points are limit ed. Is the voltage of CNDC( PNK) on multi board 330 - 350V DC during cooli ng or heating oper ation? *[...]

65 Check method of M-NET transmission power board Normal 24-30V DC ? *Correct the s hort circuit po int on the M-NET transmission lin e. 24-30V DC ? Is the inc oming main voltage 208/230V ±10% AC ? *Check wir ing *Replace M-NE T transmiss ion power bo ard *Check brea ker and incoming pow er supply *Check noise fi lter board *Check wi ring Check th[...]

66 0 10 20 30 40 50 - 2 0 - 1 0 0 1 02 03 0 4 05 0 -4 -14 32 50 68 86 104 122  °F T emperature Resistance (k  ) 500 400 300 200 100 0 25 50 75 100 120 77 122 167 212 248  °F T emperature Resistance (k  ) <Thermistor feature chart> Low temperature thermistors • Thermistor <Outdoor pipe> (TH3) • Thermistor <Low pressu[...]

67 9-9. TEST POINT DIAGRAM Outdoor multi controller board PUMY -P36NHMU(-BS) PUMY -P36NHMUR1(-BS) PUMY -P48NHMU(-BS) PUMY -P48NHMU 1 (-BS) PUMY -P48NHMU 2 (-BS) PUMY -P48NHMUR3(-BS) SW2 pump down 21S4 Four-way valve SV1 Bypass valve CNAC Power supply for multi controller board CNS1 Indoor/ outdoor unit connecting wire CNS2 T ransmission wire of cen[...]

68 Outdoor power circuit board PUMY -P36NHMU(-BS) PUMY -P36NHMUR1(-BS) PUMY -P48NHMU(-BS) PUMY -P48NHMU 1 (-BS) PUMY -P48NHMU 2 (-BS) PUMY -P48NHMUR3(-BS) T ABU/V/W Connect to the compressor (MC) V oltage among phases: 10V~180V AC T ABP1/SC-P1 Connect to 52C (P48NHMU) Connect to ACTM (+) (P36NHMU, P48NHMU 2 ) T ABP2/SC-P2 Connect to the ACTM(P) CN4[...]

69 Outdoor noise filter circuit board PUMY -P48NHMU PUMY -P48NHMU-BS PUMY -P48NHMU 1 PUMY -P48NHMU 1 -BS CNAC2 208/230V AC (Connect to the outdoor control- ler circuit board (CNAC)) EI Connect to the earth LI, NI V oltage of 208/230V AC is input (Connect to the terminal block (TB1)) CN5 Primary current (Connect to the outdoor power circuit board (C[...]

70 Outdoor noise filter circuit board PUMY -P36NHMU(-BS) PUMY -P36NHMUR1(-BS) PUMY -P48NHMU 2 (-BS) PUMY -P48NHMUR3(-BS) CNAC2 208/230V AC (Connect to the outdoor control- ler circuit board (CNAC)) EI Connect to the earth LI, NI V oltage of 208/230V AC is input (Connect to the terminal block (TB1)) CN5 52C driving signal (Connect to the outdoor con[...]

71 T ransmission power board PUMY -P36NHMU(-BS) PUMY -P36NHMUR1(-BS) PUMY -P48NHMU(-BS) PUMY -P48NHMU 1 (-BS) PUMY -P48NHMU 2 (-BS) PUMY -P48NHMUR3(-BS) CN2 Connect to the outdoor multi controller board 1 - 2 : 24–30V DC 3 - 4 : 24–30V DC CN1 Connect to the outdoor noise filter circuit board 1 – 3 : 208/230V AC[...]

72 Active filter module PUMY -P48NHMU PUMY -P48NHMU-BS PUMY -P48NHMU 1 PUMY -P48NHMU 1 -BS DCL L1 L2 ACTM P I N1 N2 (+) (- ) Load + Connection and internal circuit diagram L1, L2 Connect to the DCL(Reactor) Connect to the 52C Connect to the outdoor power circuit board (T ABN1) + – I Not used N2 Connect to the outdoor power circuit board (T ABN2) [...]

73 Active filter module PUMY -P36NHMU(-BS) PUMY -P36NHMUR1(-BS) PUMY -P48NHMU 2 (-BS) PUMY -P48NHMUR3(-BS) + DCL L1 L2 ACTM P Io N1 N2 (+) (- ) Load Connection and internal circuit diagram – + L1, L2 Connect to the DCL (Reactor) Connect to the outdoor power circuit board (T ABP1) N2 Non-connect N1 Non-connect P Connect to the outdoor power circui[...]

74 9-10. OUTDOOR UNIT FUNCTIONS SW:setting 0....OFF 1....ON 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 SW1 setting 12345678 00000000 10000000 01000000 1 1000000 00100000 10100000 01 100000 1 1 100000 00010000 10010000 01010000 1 1010000 001 10000 101 10000 01 1 10000 1111 0 0 0 0 00001000 10001000 01001000 1 [...]

75 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 SW1 setting 12345678 1111 1000 00000100 10000100 01000100 1 1000100 00100100 10100100 01 100100 1 1 100100 00010100 10010100 01010100 1 1010100 001 10100 101 10100 01 1 10100 1111 0100 00001 100 IC1 operation mode IC2 operation mode IC3 operation mode IC4 operation mode IC5 operation[...]

76 64 65 66 67 69 70 71 72 73 74 75 76 77 78 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 SW1 setting 12345678 00000010 10000010 01000010 1 1000010 10100010 01 100010 1 1 100010 00010010 10010010 01010010 1 1010010 001 10010 101 10010 01 1 10010 00001010 10001010 01001010 1 1001010 00101010 10101010 01 101010 1 1 101010 0001 1010 1001 1010 01[...]

77 Display of target subcool step data Display of indoor SC/SH data Display of discharge superheat data Display of all control target data Display of detection data from high-pressure sensor and each thermistor Display of actual frequency at time of abnormality delay Display of fan step number at time of abnormality delay Display of opening pulse o[...]

78 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 170 171 172 173 174 SW1 setting 12345678 00010001 10010001 01010001 1 1010001 001 10001 101 10001 01 1 10001 1 1 1 10001 00001001 10001001 01001001 1 1001001 00101001 10101001 01 101001 1 1 101001 0001 1001 1001 1001 0101 1001 1 101 1001 0[...]

79 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 192 193 195 196 197 198 199 200 201 202 203 204 206 207 208 209 210 SW1 setting 12345678 1111 0 1 0 1 00001 101 10001 101 01001 101 1 1001 101 00101 101 10101 101 01 101 101 1 1 101 101 0 0 0 111 0 1 1001 1 101 0101 1 101 1 101 1 101 0 0 1111 0 1 101 1 1 101 0000001 1 1000001 1 1 100001[...]

80 21 1 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 SW1 setting 12345678 1 100101 1 0010101 1 1010101 1 01 10101 1 1 1 10101 1 0001 101 1 1001 101 1 0101 101 1 1 101 101 1 001 1 101 1 101 1 101 1 0 1111 0 11 11111 0 11 000001 1 1 100001 1 1 010001 1 1 1 [...]

81 10 ELECTRICAL WIRING 10-1. OVERVIEW OF POWER WIRING 10-2. WIRE DIAMETER AND MAIN POWER SWITCH CAP ACITY 10-2-1. Wiring diagram for main power supply 10-2-2. Power supply wire diameter and capacity This chapter provides an introduction to electrical wiring for the CITY MUL TI-S series, together with notes concerning power wiring, wiring for contr[...]

82 10-3. DESIGN FOR CONTROL WIRING Please note that the types and numbers of control wires needed by the CITY MUL TI-S series will depend on the remote con- trollers and whether they are linked with the system. 10-3-1. Selection number of control wires 10-3-3. M-NET Remote controller wiring 10-3-2. Control signal wires T ransmission wires • T ype[...]

83 (3) Method of obtaining system power factor Use the following formula and the total power and current obtained in parts 1 and 2 in the above table to calculate the system power factor . System power factor = (T otal system power consumption) (T otal system current x voltage) o 100% 10-6-2. Applying to an electric power company for power and tota[...]

84 1 1 REFRIGERANT PIPING T ASKS Line-Branch Method Connection Examples (Connecting to 4 Indoor Units) Liquid Line Gas Line Piping Diameter (mm [inch]) Model PUMY -P36,48 Liquid Line (mm [inch]) Gas Line (mm [inch]) W 15.88 [5/8] W 9.52 [3/8] Liquid Line Gas Line Liquid Line Gas Line Piping Diameter (mm [inch]) Model number 18 or lower 24 to 54 W 6[...]

85 Header-Branch Method Connection Examples (Connecting to 4 Indoor Units) Liquid Line Gas Line Piping Diameter (mm [inch]) Model W 9.52 [3/8] W 15.88 [5/8] Liquid Line Gas Line Liquid Line Gas Line Piping Diameter (mm [inch]) Model number 18 or lower 24 to 54 W 6.35 [1/4] W 12.7 [1/2] W 9.52 [3/8] W 15.88 [5/8] Outdoor Unit First Branch Indoor uni[...]

86 Method of Combined Branching of Lines and Headers Connection Examples (Connecting to 5 Indoor Units) Outdoor unit First branching (branching joint) Branching joint Indoor unit Branching header T o downstream unit Blind caps A B C D E F G A+B+C+a+b+c+d+e is 120 meters [394 ft] or less A+B+b is 80 meters [262 ft] or less B+b is 30 meters [100 ft] [...]

87 Indoor unit The smallest room The second smallest room Outdoor unit V entilation apparatus Indoor unit Opening W all Outdoor unit (Situation in which there are no door openings or in which there are open- ings above and blow doors that occupy at least 0.15% of the floor area) Indoor unit Outdoor unit 1 1-2. PRECAUTIONS AGAINST REFRIGERANT LEAKAG[...]

88 12 DISASSEMBL Y PROCEDURE OUTDOOR UNIT : PUMY -P36NHMU(-BS) PUMY -P36NHMUR1(-BS) PUMY -P48NHMU(-BS) PUMY -P48NHMU 1 (-BS) PUMY -P48NHMU 2 (-BS) PUMY -P48NHMUR3(-BS) Continued to the next page. OPERA TING PROCEDURE PHOTOS & ILLUSTRA TION 1. Removing the service panel and top panel (1) Remove 3 service panel fixing screws (5 × 12) and slide t[...]

89 OPERA TING PROCEDURE PHOTOS & ILLUSTRA TION Photo 4 (6) Remove electrical parts box fixing screw (4 × 10) and detach the electrical parts box by pulling it upward. The electrical parts box is fixed with 2 hooks on the left and 1 hook on the right. Electrical parts box Electrical parts box fixing screw From the previous page. Photo 5 4. Remo[...]

90 4-way valve coil (21S4) 7. Removing the 4-way valve coil (21S4) (1) Remove the service panel. (See Figure 1) (2) Remove the top panel. (See Figure 1) [Removing the 4-way valve coil] (3) Remove 4-way valve solenoid coil fixing screw (M4 × 6). (4) Remove the 4-way valve coil by sliding the coil toward you. (5) Disconnect the connector 21S4 (green[...]

91 OPERA TING PROCEDURE PHOTOS 9. Removing bypass valve coil (SV1) and bypass valve (1) Remove the service panel. (See Figure 1) (2) Remove the top panel. (See Figure 1) (3) Remove 5 right side panel fixing screws (5 × 12) in the rear of the unit and remove the right side panel. (4) Remove the bypass valve coil fixing screw (M4 × 6). (5) Remove t[...]

92 Accumulator OPERA TING PROCEDURE PHOTOS 12. Removing the compressor (MC) (1) Remove the service panel. (See Figure 1) (2) Remove the top panel. (See Figure 1) (3) Remove 2 front cover panel fixing screws (5 × 12) and remove the front cover panel. (See Photo 3) (4) Remove 2 back cover panel fixing screws (5 × 12) and remove the back cover panel[...]

93 1 2 34 5 6 78 6 9 11 10 12 13 13-1. STRUCTURAL P ARTS PUMY -P48NHMU PUMY -P48NHMU-BS PUMY -P48NHMU 1 PUMY -P48NHMU 1 -BS Part No. Part Name Specification No. Wiring Diagram Symbol Recom- mended Q , ty PUMY -P48 NHMU(-BS) PUMY -P48 NHMU 1 (-BS) Remarks (Drawing No.) 1 2 3 4 5 6 7 8 9 10 11 12 13 1 2 1 1 1 2 1 1 1 1 1 1 1 1 2 1 1 1 2 1 1 1 1 1 1 1[...]

94 26 25 27 30 29 28 21 24 23 22 1 2 3 10 11 12 13 14 15 16 17 18 19 20 18 4 7 8 9 5 6 13-2. FUNCTIONAL P ARTS PUMY -P48NHMU PUMY -P48NHMU 1 PUMY -P48NHMU-BS PUMY -P48NHMU 1 -BS[...]

95 Part No. Part Name Specification No. Wining Diagram Symbol Recom- mended Q , ty Remarks (Drawing No.) Q , ty/set 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 2 2 2 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 : 2.5  : 0.8  1000mm [ : (3/32) % : (1/32) % L(39-1/2)]inch R01 E44[...]

96 26 25 27 29 28 21 24 23 22 1 2 3 10 11 12 13 14 15 16 17 18 19 20 4 7 8 9 5 6 18 14-1. FUNCTIONAL P ARTS PUMY -P36NHMU(-BS) PUMY -P36NHMUR1(-BS) PUMY -P48NHMU 2 (-BS) PUMY -P48NHMUR3(-BS) 14 RoHS P ARTS LIST[...]

97 Part No. Part Name Specification No. RoHS Wining Diagram Symbol Recom- mended Q'ty Remarks (Drawing No.) Q'ty/set 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G 2 2 2 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1[...]

98 1 2 34 5 6 7 8 6 9 11 10 12 13 14 14-2. STRUCTURAL P ARTS PUMY -P36NHMU(-BS) PUMY -P36NHMUR1(-BS) PUMY -P48NHMU 2 (-BS) PUMY -P48NHMUR3(-BS) Part No. Part Name Speci- fication No. RoHS Wiring Diagram Symbol Recom- mended Q’ty PUMY -P36 NHMU(-BS) PUMY -P36 NHMUR1(-BS) PUMY -P48 NHMU 2 (-BS) PUMY -P48 NHMUR3(-BS) Remarks (Drawing No.) 1 2 3 4 5 [...]

99 15 OPTIONAL P ARTS CMY -Y62-G-E CMY -Y64-G-E NUMBER OF BRANCHING POINTS 2 4 CMY -Y68-G-E 8 BRANCH PIPE (Joint) Part No. DRAIN SOCKET Part No. P AC-SG61DS-E AIR OUTLET GUIDE Part No. P AC-SG59SG-E DRAIN P AN Part No. P AC-SG64DP-E w Need 2 pieces. AIR GUIDE Part No. P AC-SH63AG-E w Need 2 pieces.[...]

HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO100-8310, JAP AN c Copyright 2006 MITSUBISHI ELECTRIC ENGINEERING CO., L TD. Distributed in Dec. 2010 No. OC366 REVISED EDITION-F Distributed in Sep. 2010 No. OC366 REVISED EDITION-E PDF 5 Distributed in Nov . 2009 No. OC366 REVISED EDITION-D PDF 7 Distributed in Jul. 2008 No. OC366 REV[...]