Mitsubishi Electric City Multi PEFY-P06NMAU-E4 Technical & Service Manual Download Page 19 | Manualshive

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[

VI

Refrigerant System Diagram ]

- 12 -

HWE20150

GB

VI

Refrigerant System Diagram

[1] Refrigerant system diagram

(A)

Gas pipe thermistor TH23

(B)

Gas pipe

(C)

Liquid pipe

(D)

Brazed connections

(E)

Strainer (#100 mesh)

(F)

Linear expansion valve

(G)

Liquid pipe thermistor TH22

(H)

Heat exchanger

(I)

Room temperature thermistor TH21

Capacity

PEFY-P06, 08, 12, 15, 18NMAU-E4

PEFY-P24, 27, 30, 36, 48, 54NMAU-E4

Gas pipe

ø12.7 [1/2]

ø15.88 [5/8]

Liquid pipe

ø6.35 [1/4]

ø9.52 [3/8]

(H)

(I)

(F)

(E)

(E)

(C)

(G)

(A)

(D)

(B)

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Summary of Contents for City Multi PEFY-P06NMAU-E4

Page 1: ......

Page 2: ...t It may also be in violation of applicable laws MITSUBISHI ELECTRIC CORPORATION cannot be held responsible for malfunctions or accidents resulting from the use of the wrong type of refrigerant Ask your dealer or a qualified technician to install the unit Improper installation by the user may result in water leak age electric shock or fire Properly install the unit on a surface that can withstand ...

Page 3: ...or explode When installing the unit in a small space take appropriate precautions to prevent leaked refrigerant from reaching the limiting concentration Leaked refrigerant gas will displace oxygen and may cause oxygen starvation Consult your dealer before installing the unit Consult your dealer or a qualified technician when moving or reinstalling the unit Improper installation may result in water...

Page 4: ...of the cylinder first the composition of the remaining refrigerant in the cylinder will change and become unsuitable for use Only use R410A The use of other types of refrigerant that contain chloride may cause the refrigerator oil to deteriorate Use a vacuum pump with a check valve If a vacuum pump that is not equipped with a check valve is used the vacuum pump oil may flow into the refrigerant cy...

Page 5: ...iv HWE20150 GB ...

Page 6: ...ation 13 2 Drying operation 15 3 Fan operation 16 4 Heat operation 17 5 Auto operation Automatic Cool Heat change over operation 18 6 When unit is stopped control mode 19 7 Heater control 19 VIII Troubleshooting 1 Troubleshooting 25 1 Check methods 25 2 DC fan motor fan motor indoor control board 29 3 Address switch setting 30 4 Voltage test points on the control board 31 5 Dipswitch setting Facto...

Page 7: ...HWE20150 GB ...

Page 8: ...8000 9000 2 3 2 6 PEFY P12NMAU E4 12000 13500 3 5 4 0 PEFY P15NMAU E4 15000 17000 4 4 5 0 PEFY P18NMAU E4 18000 20000 5 3 5 9 PEFY P24NMAU E4 24000 27000 7 0 7 9 PEFY P27NMAU E4 27000 30000 7 9 8 8 PEFY P30NMAU E4 30000 34000 8 8 10 0 PEFY P36NMAU E4 36000 40000 10 6 11 7 PEFY P48NMAU E4 48000 54000 14 1 15 8 PEFY P54NMAU E4 54000 60000 15 8 17 6 ...

Page 9: ... Components and Functions 2 HWE20150 GB II Components and Functions 1 Components and Functions 1 Indoor Main Unit 1 In case of rear inlet 2 In case of bottom inlet Air inlet Air outlet Air outlet Air inlet ...

Page 10: ...cept for the ON OFF button 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 The functions of the function buttons change depending on the screen Refer to the button function guide that appears at the bottom of the LCD for the functions they serve on a given screen When the system is centrally cont...

Page 11: ...ppears when the timer is disabled by the centralized control system appears when the HOLD function is enabled Appears when the Weekly timer is enabled Appears while the units are operated in the energy save mode Will not appear on some models of indoor units Appears while the outdoor units are operated in the silent mode Appears when the built in thermistor on the remote controller is activated to...

Page 12: ...Low Mid High measured in anechoic room Insulation material EPS Polyethylene foam Urethane foam Air filter PP honeycomb fabric Protection device Fuse Refrigerant control device LEV Connectable outdoor unit R410A CITY MULTI Diameter of Liquid R410A in mm 1 4 6 35 Brazed 1 4 6 35 Brazed 1 4 6 35 Brazed 1 4 6 35 Brazed refrigerant pipe Gas R410A in mm 1 2 12 7 Brazed 1 2 12 7 Brazed 1 2 12 7 Brazed 1 ...

Page 13: ...d in anechoic room Insulation material EPS Polyethylene foam Urethane foam Air filter PP honeycomb fabric Protection device Fuse Refrigerant control device LEV Connectable outdoor unit R410A CITY MULTI Diameter of Liquid R410A in mm 1 4 6 35 Brazed 3 8 9 52 Brazed 3 8 9 52 Brazed 3 8 9 52 Brazed refrigerant pipe Gas R410A in mm 1 2 12 7 Brazed 5 8 15 88 Brazed 5 8 15 88 Brazed 5 8 15 88 Brazed O D...

Page 14: ...ne foam Air filter PP honeycomb fabric Protection device Fuse Refrigerant control device LEV Connectable outdoor unit R410A CITY MULTI Diameter of Liquid R410A in mm 3 8 9 52 Brazed 3 8 9 52 Brazed 3 8 9 52 Brazed refrigerant pipe Gas R410A in mm 5 8 15 88 Brazed 5 8 15 88 Brazed 5 8 15 88 Brazed O D Diameter of drain pipe in mm O D 1 1 4 32 Drawing External Wiring Refrigerant cycle Standard Docum...

Page 15: ...9 6kΩ 20 C 6 3kΩ 25 C 5 4kΩ 30 C 4 3kΩ 40 C 3 0kΩ Gas pipe thermistor TH23 Resistance 0 C 15kΩ 10 C 9 6kΩ 20 C 6 3kΩ 25 C 5 4kΩ 30 C 4 3kΩ 40 C 3 0kΩ Fuse F1 250 VAC 6 3A F2 400 VDC 3A Fan motor MF 8 pole Output 121W ZWB278D54A Linear expansion valve LEV 12 VDC Stepping motor 0 2000 pulse Power supply terminal block TB2 L1 L2 250V 20A Transmission terminal block TB5 TB15 1 2 250V 15A M1 M2 S 250V ...

Page 16: ... 5 3 8 135 153 6 1 16 73 2 7 8 100 3 15 16 2 11 16 5 3 8 Suspension bolt pitch 18 3 4 210 8 5 16 40 1 5 8 40 1 5 8 250 9 7 8 40 1 5 8 33 1 5 16 122 4 13 16 D Duct 20 13 16 100 3 15 16 X E 1 F 30 1 3 16 100 3 15 16 217 8 9 16 41 1 5 8 100 3 15 16 356 14 1 16 67 136 732 28 7 8 700 27 9 16 32 1 5 16 238 9 3 8 10 7 16 23 15 16 178 7 1 16 643 25 3 8 B Suspension bolt pitch A 10 7 16 57 2 1 4 58 2 5 16 ...

Page 17: ...e arrow B Intake air 7 16 13 16 Supply air Min 10mm Min 20mm Access door 3 Ceiling B Fig 3 Ceiling beam Control box 7 16 Intake air Supply air 11 13 16 17 3 4X17 3 4 11 13 16 17 3 4 17 3 4 17 3 4 17 3 4 2 5 15 16 Bottom of indoor unit 17 3 4X17 3 4 Viewed from the direction of the arrow A 3 15 16 7 7 8 Intake air Supply air Fig 2 Fig 1 A Min 10mm Min 300mm Control box Access door 2 450 450 Ceiling...

Page 18: ...H23 TH21 TB5 5 6 7 4 1 5 6 2 1 1 3 CN24 1 1 3 CN3M Yellow Yellow CN24 2 Blue NOTE 3 Drain Pump Float switch Power source terminal block Transmission terminal block Transmission terminal block Thermistor inlet air temp detection Thermistor piping temp detection liquid Thermistor piping temp detection gas CN2A Varistor Connector 0 10V Analog input CN32 Connector Remote switch CN41 Connector HA termi...

Page 19: ... TH23 B Gas pipe C Liquid pipe D Brazed connections E Strainer 100 mesh F Linear expansion valve G Liquid pipe thermistor TH22 H Heat exchanger I Room temperature thermistor TH21 Capacity PEFY P06 08 12 15 18NMAU E4 PEFY P24 27 30 36 48 54NMAU E4 Gas pipe ø12 7 1 2 ø15 88 5 8 Liquid pipe ø6 35 1 4 ø9 52 3 8 H I F E E C G A D B ...

Page 20: ...ed and an additional 3 minutes have passed 1 Liquid pipe temp TH22 and gas pipe temp TH23 are 50 F or above continuously for 1 min 2 The condition of the Thermo OFF has become complete by thermal regulating unit satisfies by set point 3 The operation mode becomes a mode other than COOL or Dry 4 The operation is stopped unit is turned off 5 Three min have passed from start of anti freezing control ...

Page 21: ...changed from the Cool or Drying to the others including Stop OFF the control after the drain pump ON for 3 minutes 2 Float switch control Float switch control judges whether the sensor is in the air or in the water by turning the float switch ON OFF In the water Detected that the float switch is ON for 15 seconds In the air Detected that the float switch is OFF for 15 seconds Type Fan speed notch ...

Page 22: ...emote controller setting is not acceptable 3 Drain pump 1 Same control as Cool operation How to operate 1 Press POWER ON OFF button 2 Press the F1 button to display Drying 3 Press the F2 or F3 button to set the desired temperature The set temperature changes 2 F when the F2 or F3 button is pressed one time Drying 67 to 87 F Room temperature 3 min passed since starting operation Dry thermo ON time ...

Page 23: ...ubmerged in the water when the float switch control judges the sensor is in the water 2 Float switch control Float switch control judges whether the sensor is in the air or in the water by turning the float switch ON OFF In the water Detected that the float switch is ON for 15 seconds In the air Detected that the float switch is OFF for 15 seconds How to operate 1 Press POWER ON OFF button 2 Press...

Page 24: ...m OFF to ON 3 When release the Heat defrosting operation A Hot adjust mode starts B 5 minutes have passed since the condition A or the indoor liquid pipe temperature turned 95 F or more C 2 minutes have passed since the condition A Terminating the hot adjust mode 1 STAND BY will be displayed during the hot adjust mode 3 Preheating exclusion mode When the condition changes the auxiliary heater ON t...

Page 25: ...loat switch ON OFF In the water Detected that the float switch is ON for 15 seconds In the air Detected that the float switch is OFF for 15 seconds 5 Auto operation Automatic Cool Heat change over operation 1 Initial value of operation mode 1 Heat mode for room temperature Desired temperature 2 Cool mode for room temperature Desired temperature 2 Mode change 1 Heat mode Cool mode Room temperature ...

Page 26: ...NMAU E4 DIP S W Indoor unit 1 Heater control SW3 2 SW3 4 Pattern Defrost Error DIP S W OFF 3 N A OFF Heater not Available ON OFF Heater Available OFF OFF ON ON Heater Available ON ON 2 DIP S W ON 3 Normal drive OFF Heater not Available ON OFF Heater Available OFF OFF ON ON Heater Available ON ON 2 Defrost drive H P drive H P stop OFF Heater not Available ON OFF Heater Available OFF OFF ON ON Heate...

Page 27: ...able 2 Heater Control Table Mode Change Condition EH1 ON To TRA 2 7 F 1 5 C AND TRA has not increased by 0 9 F 0 5 C in X min EH2 ON EH1 ON for 5 min AND To TRA 2 7 F 1 5 C AND TRA has not increased by 0 9 F 0 5 C in 5 min EH1 OFF To TRA 0 9 F 0 5 C EH2 OFF KEY EH1 Electric Heater 1 EH2 Electric Heater 2 To Set point temperature TRA Return Air temperature X Time delay Selectable Default is 20 min ...

Page 28: ... Heater Operation Example Step Condition Result To TRA 2 7 F 1 5 C AND TRA has not increased by 0 9 F 0 5 C in X min EH1 ON To TRA 2 7 F 1 5 C AND TRA increasing faster than 0 9 F 0 5 C in 5 min EH2 not ON To TRA 0 9 F 0 5 C EH1 OFF To TRA 2 7 F 1 5 C AND TRA has not increased by 0 9 F 0 5 C in X min EH1 ON To TRA 2 7 F 1 5 C AND TRA not increasing faster than 0 9 F 0 5 C in 5 min EH2 ON To TRA 0 ...

Page 29: ...is function is available when function setting No 123 is set to 2 1 The heater will not turn on in the error of TH1 thermistor or fan motor 2 See WT06231 for the details of this function 3 X time delay default is 20 min and changeable by function setting see Table 3 Rooms temp does not rise in X min No Cooling Priority mode Yes Yes Start Yes During Error During Defrost 5 min passed Function settin...

Page 30: ...t connects to CITY MULTI air conditioner R410A series indoor unit This products is the special wiring parts to drive an electric heater with the air conditioner 1 Parts list Check that the following parts are included in the package 1 External output cable 2 in total Two types of cables with different connectors are included 2 Panel heater connector 3 in total White 1 Green 2 2 types Pattern CN22 ...

Page 31: ...cal wiring for the PAC YU25HT is 2 meters 6 1 2 ft To extend this length use sheathed 2 core cable Control cable type CVV CVS CPEV or equivalent Cable size 0 5 mm2 1 25 mm2 16 to 22 AWG Don t extend the cable more than 10 meters 32ft 4 Wiring restrictions Keep the length of the cable connecting to the circuit board of the indoor unit shorter than 10 meters 32ft Longer than 10 meters 32ft could cau...

Page 32: ...resistance between terminals with a tester Refer to the next page for details Normal Abnormal 4 3k 9 6k Open or short Refer to the thermistor characteristic graph below Low temperature thermistor Room temperature thermistor TH21 Liquid pipe thermistor TH22 Gas pipe thermistor TH23 Drain sensor DS Thermistor R0 15 k 3 Multiplier of B 3480 k 2 0 C 32 F 15k 10 C 50 F 9 6k 20 C 68 F 6 3k 25 C 77 F 5 2...

Page 33: ...lse changes in the following order When the valve closes 1 2 3 4 1 When the valve opens 4 3 2 1 4 When the valve position remains the same all output signals will be OFF If any output signal is missing or if the signal remains ON the motor vibrates and makes clicking noise A Red G Control board C Blue H Connection CN60 D Orange I Drive circuit E Yellow J Linear expansion valve F White Phase number...

Page 34: ...g Criteria Remedy Circuit failure on the microcomputer Disconnect the connectors on the control board and connect LEDs to test the cir cuit as shown below Pulse signals are output for 10 seconds when the main power is turned on If there are LEDs that do not light up at all or remain lit after the pulses are turned off there is a problem with the driving circuit Replace the in door control board if...

Page 35: ...c essary unless it is causing a problem Misconnections of connectors or con tact failure Perform a visual check for disconnected connectors Perform a visual check of lead wire color Disconnect the connectors on the control board and perform a continuity test Symptom Checking Criteria Remedy A LEV 1 Check if the drain float switch works properly 2 Check if the drain pump works and drains water prop...

Page 36: ...ormal Replace the fan motor and the fuse F2 Replace the indoor controller board Wiring contact check Contact of fan motor connector CNMF Replace the drain pump Is there contact failure Wiring recovery Power supply check Remove the connector CNMF Measure the voltage in the indoor controller circuit board TEST POINT VDC between 1 and 4 of the fan connector VDC 294 325 V DC TEST POINT VCC between 5 a...

Page 37: ...red for the indoor units to run 2 Address settings vary in different systems Refer to the section on address setting in the outdoor unit installation manual 3 Address is set with a combination of SW12 10 s digit and SW11 1 s digit To set the address to 3 set SW12 to 0 and SW11 to 3 To set the address to 25 set SW 12 to 2 and SW 11 to 5 A Indoor unit control board SW22 0 1 2 3 4 5 6 7 8 9 A BCDE F ...

Page 38: ...rminal A CN44 Thermistor liquid gas temperature CN4F Float thermistor CN22 For fan control CN20 Thermistor Inlet temperature CN27 Damper CN24 1 Heater control 1st CN24 2 Heater control 2nd CN2A 0 10V Analog input CN90 Wireless CN105 IT terminal CNMF Fan motor output 1 4 294 325 VDC 5 4 15 VDC 6 4 0 6 5 VDC 7 4 Stop 0 or 15 VDC Run 7 5 VDC 0 15 pulse CNP Drain up mechanism output 13 VDC Between 1 a...

Page 39: ...rmo OFF 7 8 Fan speed notch in heating thermo off OFF OFF Very low 8 ON OFF Low OFF ON Preset fan speed ON ON Stop 9 Auto restart after power failure Enabled Disabled 10 Power start stop Enabled Disabled Factory setting ON 1 2 3 4 5 6 7 8 9 10 Switch position Function Switch setting ON OFF 1 Unit type Cooling only Heat pump 2 Heater available Heater available Heater not available 3 4 Heater Contro...

Page 40: ...not match because the latest setting from the remote controller overrides the previous setting To check the latest static pressure setting check it on the remote controller not on the switch If the static pressure setting for the duct is lower than that for the unit the fan of the unit may repeat start stop and the outdoor unit may remain in a stopped state Match the static pressure settings for t...

Page 41: ... be made while the unit is stopped 7 Connection No setting 1 SW14 Rotary switch This switch is used when the unit connected to an R2 series of outdoor unit Note Changes to the dipswitches SW11 SW12 SW14 and SW15 must be made while the unit is stopped and the remote controller is OFF External static pressure SW21 1 SW21 2 SW21 5 Initial setting 35 Pa OFF OFF OFF 50 Pa ON OFF OFF 70 Pa OFF ON ON 100...

Page 42: ...ssembly Procedure 1 Disassembly Procedure 1 Control box Exercise caution when removing heavy parts 1 Removing the control box cover 1 Remove the three fixing screws on the cover A to re move it Tighten screws to a torque of 2 0 0 2 N m Fig 1 Fig 2 A ...

Page 43: ...ove the control box cover according to the procedure in section 1 2 Remove the thermistor 1 Pull out the thermistor holder B and thermistor C on the control box Fig 3 D B C 1 Remove the control box cover according to the procedure in section 1 2 Remove the drain pump 1 Remove the drain pump from connector E in control box 2 Remove the cover D and the drain pump Fig 4 E ...

Page 44: ...n the tab on the filter and pull out the filter in the direction of the arrow 1 2 Remove the fixing screws on the bottom plate F G to remove it Tighten screws to a torque of 1 4 0 2 N m Fig 5 2 Removing the drain pan 1 Pull out the drain pan in the direction of the arrow 2 Fig 6 Note Drain the water out of the drain pan before removing it G F 1 1 2 ...

Page 45: ...to the procedure in sec tion 4 2 Removing the Heat exchanger cover 1 Remove the three fixing screws on the heat exchanger cover H to remove it Tighten screws to a torque of 1 4 0 2 N m Fig 7 3 Removing the thermistor 1 Remove the thermistor J from the thermistor holder K on the copper tube Thermistor size Liquid pipe ø8mm Gas pipe ø6mm Fig 8 H HEX J K ...

Page 46: ...queeze the tabs on the fan casing to remove it in the di rection of arrow 2 Fig 10 a Tab 3 Removing the motor cable 1 Remove the motor cable threw the rubber bush 4 Removing the fan motor and the Sirocco fan 1 Loosen either of the two rubber joint N fixing screws 2 To remove the Sirocco fans b and c of PEFY P36 48 54NMAU E4 loosen only the screw d on the bearing support P and remove the other scre...

Page 47: ...m Fig 13 1 Remove the drain pan according to the procedure in section 4 2 Remove the heat exchanger cover according to the proce dure in section 5 2 3 Removing the cover 1 Remove the five fixing screws on the cover Q to remove it Tighten screws to a torque of 2 0 0 2 N m Fig 14 4 Removing the Heat exchanger 1 Remove the fixing screws on the heat exchanger R to re move it Tighten screws to a torque...

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