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CONTENTS

HWE1804A GB

I Features

[1] Features.................................................................................................................................... 1

II Part Names and Functions

[1] Part Names and Functions ....................................................................................................... 2

1.Indoor (main) unit.................................................................................................................... 2

2.Remote controller ................................................................................................................... 3

III Specification

[1] Specification ............................................................................................................................. 5

1.Specification ........................................................................................................................... 5

2.Electrical parts specifications.................................................................................................. 6

IV Outlines and Dimensions

[1] Outlines and Dimensions.......................................................................................................... 7

V Wiring Diagram

[1] Wiring Diagram ....................................................................................................................... 11

VI Refrigerant System Diagram

[1] Refrigerant System Diagram ..................................................................................................13

VII Troubleshooting

[1] Troubleshooting ...................................................................................................................... 14

1.Check methods..................................................................................................................... 14

2.DC fan motor (fan motor/indoor control board)..................................................................... 18

3.Setting of address switch...................................................................................................... 19

4.Voltage test points on the control board ............................................................................... 20

5.Setting of dip-switch (at delivery).......................................................................................... 21

6.Function setting .................................................................................................................... 21

7.Selecting external static pressure......................................................................................... 22

8.Enabling the function to prevent cold draft (during heating operation) ................................. 22

9.Setting addresses ................................................................................................................. 23

10.Function the LED of the indoor unit service board.............................................................. 23

VIII Disassembly Procedure

[1] Disassembly Procedure (PEFY-P36, 48NMHU-E-OA)........................................................... 24

1.Control box ........................................................................................................................... 24

2.Fan and fan motor ................................................................................................................ 25

3.LEV, thermistor (Liquid/Gas piping temperature detection).................................................. 26

4.Drain pump ........................................................................................................................... 27

5.Heat exchanger .................................................................................................................... 28

6.Control box inside layout ...................................................................................................... 30

7.Thermistor position ............................................................................................................... 31

[2] Disassembly Procedure (PEFY-P72, 96NMHU-E-OA)........................................................... 32

1.Control box ........................................................................................................................... 32

2.Fan and fan motor ................................................................................................................ 33

3.LEV, thermistor (Liquid/Gas piping temperature detection).................................................. 35

4.Drain pump ........................................................................................................................... 36

5.Heat exchanger .................................................................................................................... 38

6.Control box inside layout ...................................................................................................... 40

7.Thermistor position ............................................................................................................... 41

Brand	Mitsubishi Electric
Model	CITY MULTI PEFY Series
Category	Air Conditioner
Language	English

Mitsubishi Electric CITY MULTI PEFY Series User Manual

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