Mitsubishi Heavy Industries SRK20ZJX-S Bedienungsanleitung

SERVICE MANUAL

Manual No.'10•SCM-SM-094

INVERTER MULTI-SPLIT SYSTEM

RESIDENTIAL AIR CONDITIONERS

(Split system, air to air heat pump type)

(OUTDOOR UNIT)

SCM40ZJ-S

SCM45ZJ-S

SCM50ZJ-S

SCM60ZJ-S

SCM71ZJ-S

SCM80ZJ-S

(INDOOR UNIT)

Wall mounted type

SRK20ZJX-S

SRK25ZJX-S

SRK35ZJX-S

SRK50ZJX-S

SRK60ZJX-S

SRK20ZJ-S

SRK25ZJ-S

SRK35ZJ-S

SRK50ZJ-S

Floor standing type

SRF25ZJX-S

SRF35ZJX-S

SRF50ZJX-S

Ceiling concealed type

SRR25ZJ-S

SRR35ZJ-S

SRR50ZJ-S

SRR60ZJ-S

Ceiling cassette-4way compact type

FDTC25VD

FDTC35VD

FDTC50VD

FDTC60VD

'10 • SCM-SM-094

CONTENTS

............................................ 30

(1) Summary ........................................................................................... 28

(1) Summary ............................................................................................. 30

(4) Defrosting operation ......................................................................... 29

(2) Operation of major functional components in heating mode .............. 28

(2) Operation of major functional components in cooling mode ............... 30

(3) Hot keep operation .......................................................................... 28

(1) SRK20～60ZJX-S,SRF and SRR series

........................................................................ 31

(2) SRK20～60ZJ-S series

...................................................................................... 31

(3) FDTC series

1.1 SRK,SRF and SRR series ................................................................... 5

1.2 FDTC series ........................................................................................ 16

1.3 Outline of heating operation ............................................................. 28

1.4 Outline of cooling operation ............................................................. 30

1.5 Outline of automatic operation ......................................................... 30

1. OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER ............... 5

(6) Air outlet selection (SRF series only) .................................................. 12

....................................................... 9

(1) Operation control function by remote controller

(5) Flap and louver control ...................................................................... 10

(4) Custom cord switching procedure

......................................................................... 9(3) Auto restart function

(2) Unit ON/OFF button ........................................................................... 8

.................................. 5

(1) Remote controller (Option parts)

............................ 19(3) Operation control function by the indoor controller

(2) Operation control function by the wired remote controller ................. 18

...................................................... 16

(7) 3D auto operation (SRK series only) .................................................. 12

(8) Timer operation .................................................................................. 13

(9) Installation location setting (SRK series only) ................................... 14

....................................................... 14

(11) Drain motor (DM) control (SRR series only) ..................................... 15

(10) Determining the operating mode

1.6 Operation permission/prohibition control ...................................... 32

by releasing the jumper wire (J3) on the indoor PCB

....................... 32(3) In the case of CnT input OFF (Operation prohibition)

(2) In the case of CnT input ON (Operation permission) ........................ 32

......................... 32

(1)

The operation mode is switched over between Permission and Prohibition

'10 • SCM-SM-094

............................... 39

(12) Current safe ...................................................................................... 37

(18) Serial signal transmission error protection ....................................... 39

(11) Compressor overheat protection ...................................................... 37

(17) Regulation of outdoor air flow .......................................................... 38

(15) Indoor fan motor protection .............................................................. 38

(16) Discharge pipe sensor disconnection protection control ................. 38

(13) Current cat ....................................................................................... 38

(19) Rotor lock ........................................................................................ 39

(20) Outdoor fan motor protection ........................................................... 39

(14) Outdoor unit failure ........................................................................... 38

(21) Outdoor fan control at low outdoor temperature

.................................................. 40(22) Outdoor unit fan control at overload

1.8 Protective control function ................................................................. 33

1.7 External control (remote display)/control of input signal ............... 32

(2) Control of input signal ......................................................................... 32

(1) External control (remote display) output ............................................. 32

(7) Heating low outdoor temperature protective control

............................................................................... 36(9) Crankcase heater

.............................................................................. 37(10) Inching prevention

(8) Freezing cycle system protective control ........................................... 36

......................... 36

(1) Frost prevention control .................................................................... 33

(2) Cooling overload protective control .................................................... 33

........................................................... 34

(5) Heating high pressure control .......................................................... 35

(6) Heating overload protective control ................................................... 35

(4) Cooling low outdoor temperature protective control

(3) Cooling high pressure control

.......................... 34

2.1 SRK,SRF and SRR series ................................................................. 41

2. MAINTENANCE DATA ........................................................................... 41

(1) Cautions ........................................................................................... 41

(2) Items to check before troubleshooting ............................................. 41

...... 41

(4) Troubleshooting procedure (If the air conditioner runs)

(3)

Troubleshooting procedure (If the air conditioner does not run at all)

.................. 42

(5) Self-diagnosis table .......................................................................... 43

(6) Service mode (Trouble mode access function) ............................... 44

.................. 52

(8)

Phenomenon observed after shortcircuit, wire breakage on sensor

(7) Inspection procedures corresponding to detail of trouble

......... 56

'10 • SCM-SM-094

..............................................................147

3.2 Indoor units ........................................................................................119

(3) Models SCM71ZJ-S,80ZJ-S ..........................................................135

3.1 Outdoor units ......................................................................................116

(2) Models SCM50ZJ-S,60ZJ-S ..........................................................131

(1) Models SCM40ZJ-S,45ZJ-S ..........................................................127

(1) Wall mounted type (SRK) ..............................................................139

(2) Floor standing type (SRF)

.........................................................151(3) Ceiling concealed type (SRR)

.................................155(4) Ceiling cassette-4way compact type (FDTC)

2.2.1 Diagnosing of microcomputer circuit ........................................ 63

2.2.2 Troubleshooting flow .................................................................. 75

2.2 FDTC series ....................................................................................... 63

5.1 Installation of outdoor unit ............................................................127

5.2 Installation of indoor unit ..............................................................139

(11) Outdoor unit inspection points ......................................................... 59

............................................................................... 76(2) Troubleshooting

............................. 58(10) How to make sure of wireless remote controller

(1) List of troubles .................................................................................. 75

(1) Selfdiagnosis function ...................................................................... 63

(2) Troubleshooting procedure .............................................................. 66

................................................... 66

(5) Inverter checker for diagnosis of inverter output ............................. 71

(6) Outdoor unit inspection points ........................................................ 72

(4) Check of anomalous operation deta with the remote controller

(3) Troubleshooting at the indoor unit

........ 70

(9) Checking the indoor electrical equipment ....................................... 57

3. ELECTRICAL WIRINGS ........................................................................116

4. PIPING SYSTEMS ................................................................................124

5. APPLICATION DATAS .........................................................................127

'10 • SCM-SM-094

■How to read the model name

Example:

Indoor unit

SRK 20 Z

Series code

Inverter type

Product capacity

Model name SRK : Wall mounted type

SRF : Floor standing type

SRR : Ceiling concealed type

FDTC : Ceiling cassette-4 way

compact type

JX-S

Example:

Outdoor unit

SCM 60 Z

Series code

Inverter type

Product capacity

Model name

(Outdoor unit)

J-S

Capacity

Model

Floor standing type (SRF)

Outdoor unit to be combined (SCM)

20 25 35 6050

SCM40ZJ-S,45ZJ-S,50ZJ-S,60ZJ-S,71ZJ-S,80ZJ-S

○

○ ○

○

○ ○ ○ ○

Ceiling concealod type (SRR)

■Table of models

Wall mounted type (SRK-ZJX-S)

Wall mounted type (SRK-ZJ-S)

Ceiling cassette-4way compact type

(FDTC)

'10 • SCM-SM-094

1 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER

1.1 SRK, SRF and SRR series

(1) Operation control function by remote control

4Operation section

Remote controller

SRK series

FAN SPEED button

OPERATION MODE select button

ON/OFF (luminous) button

HI POWER/ECONO button

AIR FLOW (UP/DOWN) button

SLEEP button

CLEAN switch

ON TIMER button

AIR FLOW (LEFT/RIGHT) button

3D AUTO button

ALLERGEN CLEAR button

RESET switch

OFF TIMER button

TEMPERATURE button

CANCEL button

• The above illustration shows all controls, but in practice

only the relevant parts are shown.

Each time the button is pressed, the

display is switched over in turn.

FAN SPEED button

This button changes the HIGH POWER/

ECONOMY mode.

HI POWER/ECONO button

These buttons set the indoor temperature.

(These buttons are used for setting the

current time and timer function as well.)

TEMPERATURE button

This button selects ON TIMER operation.

ON TIMER button

This button selects SLEEP operation.

SLEEP button

This switch selects the CLEAN mode.

CLEAN switch

This button cancels the ON timer, OFF

timer, and SLEEP operation.

CANCEL button

Each time the button pressed, the

display is switched over in turn.

OPERATION MODE select button

Press to start operation, press again to

stop.

This button changes the air flow (up/down)

direction.

SRR series

Air flow direction adjustment

can not be performed.

AIR FLOW (UP/DOWN) button

This button selects OFF TIMER operation.

OFF TIMER button

This switch is for resetting microcomputer

and setting time.

ACL switch

ON/OFF (luminous) button

Operation section

SRF series

4Operation section

'10 • SCM-SM-094

SRR series

4Operation section

Unit indication section

Model SRK20

60ZJX-S

Illuminates during 3D AUTO operation

TIMER light (yellow)

•

OFF

1.5 sec.

0.5 sec.

3 sec.

1 sec.

OFF

Unit ON/OFF button

This button can be used for turning on/off the unit when

remote controller is not available.

Remote controller signal receiver

RUN (HOT KEEP) light (green/blue)

Illuminates during operation.

green : except ECONO operation

blue : ECONO operation

Blinks when airflow stops due to the ‘HOT

KEEP’ and ‘CLEAN operation’.

HOT KEEP

CLEAN operation

Illuminates during TIMER operation.

3D AUTO light (green)

HI POWER light (green)

Illuminates during HIGH POWER operation.

'10 • SCM-SM-094

Model SRK20~50ZJ-S

3D AUTO light (green)

Illuminates during 3D AUTO operation.

HI POWER light (green)

Illuminates during HIGH POWER operation.

TIMER light (yellow)

Illuminates during TIMER operation.

This button can be used for turning on/off the unit when remote

control is not available.

Remote control signal receiver

Unit ON/OFF button

RUN (HOT KEEP) light (green)

Illuminates during operation.

Blinks when airflow stops due to the HOT

KEEP

and CLEAN operation

OFF

1.5 sec.

0.5 sec.

HOT KEEP

3 sec.

1 sec.

OFF

CLEAN operation

Model SRF25~50ZJX-S

Unit display section

AIR SELECTION button

AIR OUTLET SELECTION light (green)

Illuminates during upper air outlet operation.

TIMER light (yellow)

Illuminates during TIMER operation.

This button can be used for turning on/off the unit when remote

controller is not available.

HI POWER Light (green)

Illuminates during HIGH POWER operation.

Unit ON/OFF button

Model All models

RUN (HOT KEEP) light (green)

• Illuminates during operation.

•

Blinks when airflow stops due to the ‘HOT

KEEP’

and

‘

CLEAN operation

’.

Remote controller signal receiver

1.5 sec.

OFF

0.5 sec.

HOT KEEP

3 sec.

1 sec.

OFF

CLEAN operation

ECONO light (green)

Illuminates during ECONOMY operation.

Use this button to switch between the combination of upper and

lower air outlets and upper air outlet.

'10 • SCM-SM-094

Model SRR25~60ZJ-S

RUN (HOT KEEP) light (green)

・Illuminates during operation.

・

Blinks when airflow stops due to the

‘

HOT

KEEP

’

and

‘

CLEAN operation

’

ECONO light (orange)

Illuminates during ECONOMY operation.

TIMER light (yellow)

Illuminates during TIMER operation.

HI POWER light (green)

Illuminates during HIGH POWER operation.

Unit ON/OFF button

This button can be used for turning on/off the

unit when remote control is not available.

Remote control signal receiver

OFF

1.5 sec.

0.5 sec.

HOT KEEP

3 sec.

1 sec.

OFF

CLEAN operation

Unit ON/OFF button

(2) Unit ON/OFF button

When the remote controller batteries become weak, or if the remote controller is lost or malfunctioning, this button may be used to

turn the unit on and off.

(a) Operation

Push the button once to place the unit in the automatic mode. Push it once more to turn the unit off.

(b) Details of operation

The unit will go into the automatic mode in which it automatically determines, from indoor temperature (as detected by

sensor), whether to go into the cooling, thermal dry or heating modes.

Function

operation mode

Indoor temperature

setting

Fan speed

Flap/Louver

Timer Switch

Cooling About 24ºC

Auto Auto Continuous

Thermal dry About 25ºC

Heating About 26ºC

Unit ON/OFF butto

Unit ON/OFF button

・

Model SRK20~60ZJX-S

・

Model SRK20~50ZJ-S

・

Model SRF25~50ZJX-S

・

Model SRR25~60ZJ-S

'10 • SCM-SM-094

(3) Auto restart function

(a) Auto restart function records the operational status of the air-conditioner immediately prior to be switched off by a power cut,

and then automatically resumes operations after the power has been restored.

(b) The following settings will be cancelled:

1) Timer settings

2) HIGH POWER operations

Notes (1) Auto restart function is set at on when the air-conditioner is shipped from the factory. Consult with your dealer if this function needs to be switched off.

(2) When power failure ocurrs, the timer setting is cancelled. Once power is resumed, reset the timer.

(3)

If the jumper wire (J170 or JA1) “AUTO RESTART” is cut, auto restart is disabled. (See the diagram at right)

• ModelSRK20~60ZJX-S • Model SRK20~50ZJ-S

SRF25~50ZJX-S

SRR25~60ZJ-S

Jumper wire (J170)

Jumper wire (JA1)

(4) Custom cord switching procedure

If two wireless remote controller are installed in one room, in order to prevent wrong op

eration due to mixed signals, please

modify the printed circuit board in the indoor unit’s controlbox and the remote controller using the following procedure.

Be sure to modify both boards. If only one board is modiﬁed, receiving (and operation) cannot be done.

(a) Modifying the indoor printed circuit board

Take out the printed circuit board from the control box and cut off jumper wire (J171 or JA2) using wire cutters.

After cutting of the jumper wire, take measures to prevent contact with the other the lead wires, etc.

• ModelSRK20~60ZJX-S • Model SRK20~50ZJ-S

SRF25~50ZJX-S

SRR25~60ZJ-S

Jumper wire (J171)

Jumper wire (JA2)

Andere Handbücher für SRK20ZJX-S

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