Mitsubishi Electric CITY MULTI P500YMF-C How to use

AIR CONDITIONERS CITY MULTI

Models PURY-P400, P500YMF-C

Service Handbook

Service Handbook PURY-P400, P500YMF-C

HEAD OFFICE MITSUBISHI DENKI BLDG. MARUNOUCHI TOKYO 100-0005 TELEX J24532 CABLE MELCO TOKYO

New publication effective Aug 2002

Specifications subject to change without notice.

Service Handbook PURY-P400, P500YMF-C

Issued in Aug 2002 F1105-214(MDOC)

Printed in Japan

Contents

1PRECAUTIONS FOR DEVICES THAT USE R407C REFRIGERANT..... 3

[1] Storage of Piping Material................................................................. 4

[2] Piping Machining............................................................................... 5

[3] Brazing.............................................................................................. 6

[4] Airtightness Test................................................................................ 7

[5] Vacuuming ........................................................................................ 7

[6] Charging of Refrigerant..................................................................... 8

[7] Dryer ................................................................................................. 8

2COMPONENT OF EQUIPMENT ............................................................. 9

[1] Appearance of Components ............................................................. 9

[2] Refrigerant Circuit Diagram and Thermal Sensor ........................... 17

[3] Electrical Wiring Diagram................................................................ 20

[4] Standard Operation Data ................................................................ 24

[5] Function of Dip SW and Rotary SW................................................ 26

3TEST RUN ............................................................................................. 29

[1] Before Test Run............................................................................... 29

[2] Test Run Method............................................................................. 33

4GROUPING REGISTRATION OF INDOOR UNITS WITH M-NET

REMOTE CONTROLLER ...................................................................... 34

5CONTROL.............................................................................................. 40

[1] Control of Outdoor Unit ................................................................... 40

[2] Control of BC Controller.................................................................. 49

[3] Operation Flow Chart...................................................................... 50

[4] List of Major Component Functions ................................................ 56

[5] Resistance of Temperature Sensor................................................. 59

6REFRIGERANT AMOUNT ADJUSTMENT............................................ 60

[1] Operating Characteristics and Refrigerant Amount ........................ 60

[2] Adjustment and Judgement of Refrigerant Amount ........................ 60

[3] Refrigerant VolumeAdjustment Mode Operation............................ 62

7TROUBLESHOOTING ........................................................................... 66

[1] Principal Parts................................................................................. 66

[2] BC Controller Disassembly Procedure............................................ 99

[3] Self-diagnosis and Countermeasures Depending on the Check

Code Displayed............................................................................. 104

[4] LED Monitor Display ..................................................................... 121

8PREPARATION, REPAIRSAND REFRIGERANT REFILLING WHEN

REPAIRING LEAKS .............................................................................141

[1] Location of leaks:

Extension piping or indoor units (when cooling) ...

141

[2] Location of leaks: Outdoor unit (Cooling mode)............................ 142

[3] Location of leaks:

Extension piping or indoor units (Heating mode)..

142

[4] Location of leaks: Outdoor unit (when heating)............................. 143

9CHECK THE COMPOSITION OF THE REFRIGERANT

(PURY-P200·250YMF-C only).................................................................144

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