Mitsubishi Heavy Industries SRK13ZEV-S4, SRK22ZEV-S4 Technical Manual

INVERTER WALL MOUNTED TYPE ROOM AIR-CONDITIONER (Split system, air to air heat pump type)

SRK13ZEV-S4 SRK22ZEV-S4

ROOM AIR-CONDITIONING

TECHNICAL MANUAL & PARTS LIST

TECHNICAL MANUAL

1. SRK13ZEV-S4 .............................................................. 2

2. SRK22ZEV-S4 ............................................................ 60

MODEL SRK13ZEV-S4

CONTENTS

1.1 GENERAL INFORMATION......................................................................... 3

(1) Specific features ...................................................................................................... 3

(2) How to read the model name.................................................................................. 3

1.2 SELECTION DATA ..................................................................................... 4

(1) Specifications ......................................................................................................... 4

(2) Range of usage & limitations ................................................................................ 5

(3) Exterior dimensions ............................................................................................... 5

(4) Piping system ......................................................................................................... 6

(5) Selection chart ........................................................................................................ 7

1.3 ELECTRICAL DATA ................................................................................... 8

(1) Electrical wiring ...................................................................................................... 8

1.4 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER .............. 9

(1) Operation control function by remote control switch ......................................... 9

(2) Unit ON/OFF button ................................................................................................10

(3) Power blackout auto restart function ...................................................................10

(4) Custom cord switching procedure ....................................................................... 11

(5) Flap control .............................................................................................................11

(6) Comfortable timer setting ......................................................................................12

(7) Outline of heating operation.................................................................................. 12

(8) Outline of cooling operation.................................................................................. 15

(9) Outline of dehumidifying operation ......................................................................16

(10) Outline of automatic operation ............................................................................. 19

(11) Outline of fan operation .........................................................................................19

(12) ION operation ..........................................................................................................20

(13) Protective control function ....................................................................................20

1.5 APPLICATION DATA .................................................................................. 25

(1) Selection of location for installation..................................................................... 26

(2) Installation of indoor unit ...................................................................................... 27

(3) Installation of outdoor unit ....................................................................................30

(4) Refrigerant piping................................................................................................... 30

(5) Test run.................................................................................................................... 31

(6) Precautions for wireless remote control installation and operation .................32

1.6 MAINTENANCE DATA ............................................................................... 33

(1) Troubleshooting procedures for electrical equipment........................................ 33

(2) Servicing ................................................................................................................. 44

1.7 REFRIGERANT PIPING INSTALLATION/SERVICING MANUAL

FOR AIR CONDITIONERS USING R410A ................................................ 45

(1) Outline .....................................................................................................................45

(2) Refrigerant piping installation............................................................................... 46

(3) Installation, removal and servicing .......................................................................52

(4) Refrigerant recovery .............................................................................................. 57

1.1 GENERAL INFORMATION

(1) Specific features

The “MITSUBISHI HEAVY INDUSTRIES, LTD.” room air-conditioner: SRK series are of split and wall mounted type and the unit

consists of indoor unit and outdoor unit with refrigerant precharged in factory. The indoor unit is composed of room air cooling equip-

ment with operation control switch and the outdoor unit is composed of condensing unit with compressor.

(a) Inverter (Frequency converter) for multi-steps power control

¡ Heating/Cooling

The rotational speed of a compressor is changed in step in relation to varying load, interlocked with the indoor and outdoor unit

fans controlled to change frequency, thus controlling the capacity.

¡ Allowing quick heating/cooling operation during start-up period. Constant room temperature by fine-tuned control after the

unit has stabilized.

(b) Fuzzy control

¡ Fuzzy control calculates the amount of variation in the difference between the return air temperature and the setting temperature

in compliance with the fuzzy rules in order to control the air capacity and the inverter frequency.

The flap can be automatically controlled by operating wireless remote control.

¡ Air scroll (AUTO): Flap operation is automatically control.

¡ Swing: This will swing the flap up and down.

¡ Memory flap: Once the flap position is set, the unit memorizes the position and continues to operate at the same position from

the next time.

(d) Self diagnosis function

¡ We are constantly trying to do better service to our customers by installing such judges that show abnormality of operation as

follows.

RUN light

TIMER light

1 time flash

2 time flash

6 time flash

Heat exchanger sensor error

Room temperature sensor error

Indoor fan motor error

(2) How to read the model name

Example : SR K 13 Z EV - S4

RUN light keeps flashing

RUN light

2 time flash

TIMER light Outdoor (LED)

1 time flash

2 time flash

4 time flash

1 time flash

2 time flash

3 time flash

5 time flash 5 time flash

6 time flash 6 time flash

7 time flash ON

2 time flash 7 time flash

OFF

1 time flash

2 time flash

3 time flash

R410A models

Series No.

Inverter type

Product capacity

Wall mounted type

Split type room air-conditioner

Outdoor air temperature sensor error

Outdoor heat exchanger sensor error

Discharge pipe sensor error

Current cut

Trouble of outdoor unit

Over current

Over heat of compressor

Error of signal transmission

Outdoor fan motor error

Rotor lock

1.2 SELECTION DATA

(1) Specifications

Model SRK13ZEV-S4 (Indoor unit)

Item Cooling capacity Heating capacity Power source 1 Phase, 220V, 50Hz

(1)

Operation data

Exterior dimensions

Height × Width × Depth

Color Cool white Stucco white Net weight kg 12 39 Refrigerant equipment

Compressor type & Q’ty

Heat exchanger Louver fins & inner grooved tubing Straight fins & inner grooved tubing Refrigerant control Capillary tubes + Electronic expansion valve Refrigerant Refrigerant oil R 0.36 (RB68A) Deice control Microcomputer control

Air handling equipment

Fan type & Q’ty

Air flow (at High)

Air filter, Q’ty Polypropylene net (washable) × 2–

Shock & vibration absorber – Cushion rubber (for compressor) Electric heater –– Operation control

Operation switch Room temperature control Microcomputer thermostat – Pilot light RUN (Green), TIMER (Yellow), JET/HI POWER (Green), ION (Green)

Safety equipment

Refrigerant

piping

Drain hose Connectable Power source cord 2 m (3 cores with Earth)

Connection wiring

Accessories (included) Mounting kit, Clean filter (Allergen clear filter × 1, Natural enzyme filter × 1) Optional parts –

SRC13ZEV-S4 (Outdoor unit)

Model

(1)

Cooling input kW 0.93 (0.105~1.5) Running current (Cooling) A 5.5 Heating input kW 1.38 (0.095~2.490) Running current (Heating) A 6.8 Inrush current A 6.8 COP Cooling: 4.30 Heating: 4.35

Noise level

Motor kW – 1.1 Starting method – Line starting

Motor W 33 34

O.D mm (in) Liquid line: φ6.35 (1/4″) Gas line: φ9.52 (3/8″) Connecting method Flare connecting Attached length of piping Liquid line: 0.54 m

Insulation Necessary (Both sides)

Notes (1) The data are measured at the following conditions.

Cooling Sound level 46 47

Heating Sound level 46 47

(3)

(Cooling) (Heating)

Size × Core number 1.5 mm2 × 4 cores (Including earth cable) Connecting method Terminal block (Screw fixing type)

Item Indoor air temperature Outdoor air temperature

Operation DB WB DB WB

Cooling 27ºC 19ºC 35ºC 24ºC ISO-T1, JIS C9612

Heating 20ºC – 7ºC 6ºC ISO-T1, JIS C9612

The piping length is 7.5m.

(2) The operation data are applied to the 220V districts respectively.

(3) The refrigerant quantity to be charged includes the refrigerant in 15 m connecting piping.

(Purging is not required even for the short piping.)

If the piping length is longer, when it is 15 to 25 m, add 20 g refrigerant per meter.

W 4000 (400~5000) W 6000 (400~9000)

kg R410A 1.35 (Pre-Charged up to the piping length of 15m)

CMM

Compressor overheat protection, Heating overload protection (High pressure control), Overcurrent protection, Frost protection, Serial signal error protection, Indoor fan motor error protection, Cooling overload protection

SRK13ZEV-S4 SRC13ZEV-S4

298 × 840 × 259 595 × 780 × 290

– 5CS102XFA (Scroll type) × 1

Tangential fan × 1 Propeller fan × 1

Wireless-Remote control –

Gas line : 0.47 m

(220V)

–

Standards

(2) Range of usage & limitations

Indoor return air temperature (Upper, lower limits)

Refrigerant line (one way) length Max. 25m

SRK13ZEV-S4

Power source voltage Rating ± 10%

Voltage at starting Min. 85% of rating

Frequency of ON-OFF cycle Max. 10 times/h

ON and OFF interval Max. 3 minutes

Outdoor air temperature (Upper, lower limits)

Vertical height difference between outdoor unit and indoor unit

Max. 15m (Outdoor unit is higher) Max. 15m (Outdoor unit is lower)

Item

Model

Cooling operation : Approximately 21 to 32˚C Heating operation : Approximately 15 to 30˚C

Cooling operation : Approximately 21 to 43˚C

Heating operation : Approximately

5 to 21˚C

840

298

Piping hole right

259

right: 67

left : 60

14.5

813

603

VIEW A

44.5

47.5220.5

207.5

73.5

53.5

Piping hole (ø65)

Indoor unit

Installating board

Drain hose 515 (ø16)

Piping for gas 533.5 (ø9.52)

Piping for liquid 603.5 (ø6.35)

63.5

8.5

5.3

284.2

44.5

73.5

182.5

450

693

(3) Exterior dimensions

(a) Indoor unit

Model SRK13ZEV-S4

(b) Outdoor unit

Outdoor unitIndoor unit

Heat exchanger

Room temp. sensor

Humidity sensor

Heat exchanger

Solenoid valve

Flare connecting

Heat exchanger sensor

Piping (Liquid) ø6.35

Piping (Gas) ø9.52

Check joint

4 way valve

Service valve (Liquid)

Flare connecting

Discharge pipe temp. sensor

Cooling cycle

Heating cycle

Outdoor air temp. sensor

Heat exchanger sensor

Compressor

uffler

Capillary tube Capillary tube

Strainer

Service valve (Gas)

Electronic expansion valve

14.4

595

96.5

42.5

35°

90.6

29.7

340

13.5

312.5

17.5

164

286.4

290

45.4

49.6

463

62780

106 510

Drain holes

2-16 × 12

Ground terminal

Terminal block

Service valve (Liquid)

Service valve (Gas)

Flare connection ø6.35 (1/4")

Flare connection ø9.52 (3/8")

Unit: mm

Model SRC13ZEV-S4

(4) Piping system

Model SRK13ZEV-S4

(5) Selection chart

ISO-T1 Standard ConditionOutdoor air W.B. temperature ˚C W.B.

1005-5

16 18 20 22 24

ISO-T1 Standard ConditionIndoor air W.B. temperature ˚C W.B.

Heating

Applicable range

27 25

20 15

0.6

0.7

0.8

0.9

1.0

1.1

1.2

1.3

Cooling

Heating operation

Indoor air D.B.

temperature

˚C D.B.

Cooling operation

Outdoor air D.B.

temperature

˚C D.B.

Coefficient of cooling &

Heating capacity in

relation to temperature

Piping length [m]

Cooling

Heating

1.0

0.99

1.0

0.975

1.0

0.965

1.0

0.95

1.0

Air inlet temperature of

outdoor unit in ˚C WB

Adjustment coefficient

-5

0.91-30.88-10.8610.8730.9251.00

Correct the cooling and heating capacity in accordance with the conditions as follows. The net cooling and heating capacity can be

obtained in the following way.

Net capacity = Capacity shown on specification ✕ Correction factors as follows.

(a) Coefficient of cooling and heating capacity in relation to temperatures

(b) Correction of cooling and heating capacity in relation to one way length of refrigerant piping

It is necessary to correct the cooling and heating capacity in relation to the one way piping length between the indoor and outdoor units.

In additions to the foregoing corrections (a), (b) the heating capacity needs to be adjusted also with respect to the frosting on the outdoor heat exchanger.

How to obtain the cooling and heating capacity

Example : The net cooling capacity of the model SRK13ZEV-S4 with the piping length of 15m, indoor wet-bulb temperature at 19.0˚C

and outdoor dry-bulb temperature 35˚C is Net cooling capacity = 4000 ✕ 0.975 ✕ 1.0 = 3900 W

SRK13ZEV-S4 Length 15m

Factor by air temperatures

1.3 ELECTRICAL DATA

(1) Electrical wiring

Model SRK13ZEV-S4

Outdoor unit

Indoor unit

Printed circuit

board

TB TB

F (250V 20A)

U V

C2 S.IN R.IN

Th4

Th5

Th6

CNB

CNE

CNA

CND

Power

transistor

20S

EEV

FMo

Black Brown Red Blue White

Yellow/Green

BK BR RD BL WH

Y/GN

Yellow

Color symbol

Meaning of marks Symbol

Parts name

Compressor motor

Fuse

Fan motor (Indoor)

FMo

an motor (Outdoor)

SM RE

Flap motor Reactor

Symbol

Parts name

Room temp. sensor

Heat exchanger sensor (Indoor unit)

Humidity sensor

Heat exchanger sensor (Outdoor unit)

Outdoor air temp. sensor

Discharge temp. sensor

Symbol

Parts name

20S

4 way valve (coil)

ZNR

Varistor

52C

Magnetic contactor

Diode stack

EEV

Electronic expansion valve

Solenoid valve

ZNR

250V 3A

CNM

Printed circuit board

JEM-ACNFCNE

52C3

CNG

52C

52C4

CNU

6 5

CNL

CNV

CNN

T4 ION generator

Safety switch

Display

Wireless R-Amp

Back-up switch

Y/G

Th1 Th2 Th3

Heat exchanger

Power source 1 Phase

220V 50Hz

( )

1.4 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER

TEMP

SLEEP

ECONO

ACL

OFF

DRY MODE

AIR FLOW

CANCEL

ion

START

JET/

JET

ECONO

AM PM

SLEEP

MED

AUTO

FAN SPEED

MODE

TIME

SET UP

TIMER

JET

ECONO

AM PM

SLEEP

MED

AUTO

(1) Operation control function by remote control switch

Remote control

Model SRK13ZEV-S4

S Operation section

FAN SPEED button

Each time the button is pushed, the indicator is switched over in turn.

JET/HI POWER button

This button changes the JET/HI POWER mode

OPERATION MODE select button

Each time the button is pushed, the indicator is switched over in turn.

ON/OFF button

Press for starting operation, press again for stopping.

DRY MODE button

This button changes the DRY mode.

ION button

This button selects ION operation.

START button

This button selects ON TIMER operation.

SLEEP button

This button selects SLEEP operation.

ECONO switch

This switch changes the ECONOMY mode.

TIME SET UP switch

This switch for setting the TIME.

S Indication section

Indicates during SLEEP operation.

Indicates set temperature. (Does not indicate temperature when operation

mode is on AUTO)

Indicates set air flow rate with lamp.

Indicates during economy mode operation.

Indicates during Hi power mode operation.

SLEEP indicator

TEMPERATURE indicator

FAN SPEED indicator

ECONOMY MODE indicator

HI POWER MODE indicator

• The above illustration shows all controls, but in

practice only the relevant parts are shown.

TEMPERATURE button

This button sets the room temperature. (This button changes the present time and

TIMER time.)

AIR FLOW button

This button changes the flap mode. When pressed, this button changes the mode in the following order:

(Air scroll) (Flap stopped)

CANCEL button

This button cancels the ON timer and SLEEP timer.

RESET switch

Switch for resetting microcomputer.

ON TIMER indicator

Indicates during ON TIMER operation.

OPERATION MODE indicator

Indicates selected operation with lamp.

[ (Auto) • (Cool) • (Heat) • (Dry) • (Fan)]

Time indicator

Indicates present time or timer setting time.

DRY MODE indicator

Shows the various DRY modes.

AIR FLOW indicator

Shows selected flap mode.

Unit indication section

Model SRK13ZEV-S4

JET/HI POWER light (green)

Illuminates during JET/HIGH POWER operation.

ION light (green)

Illuminates during ION operation.

RUN (HOT KEEP) light (green)

• Illuminates during operation.

• Blinks at air flow stop due to the ‘HOT KEEP’.

TIMER light (yellow)

Illuminates during TIMER operation.

(2) Unit ON/OFF button

When the remote control batteries become weak, or if the remote control 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 room temperature (as detected by sensor),

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

Function

Operation mode

Cooling About 24ºC

Thermal dry About 25ºC Auto Auto Continuous

Heating About 26ºC

Room temperature

setting

Fan speed Flap Timer switch

(3) Power blackout auto restart function

(a) Power blackout auto restart function is a function that records the operational status of the air-conditioner immediately prior to it

being switched off by a power cut, and then automatically resumes operations at that point after the power has been restored.

(b) The following settings will be cancelled:

(i) Timer settings

(ii) High-power operations

Notes (1) The power blackout 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 (J1) is cut, auto restart is disabled. (See the diagram at right)

Unit ON/OFF button

Jumper wire (J1)

Thick line : Rapid movement

Thin line : Slow movement

Stops for approximately 5 seconds in the horizontal position.

Stops for approximately 5 seconds in this position.

Thick line : Rapid movement

Thin line : Slow movement

(4) Custom cord switching procedure

Jumper wire (J2)

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

operation due to mixed signals, please modify the printed circuit board in the indoor

unit’s control box and the remote control 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 unit’s printed circuit board

Take out the printed circuit board from the control box and cut off jumper wire

(J2) using wire cutters.

After cutting of the jumper wire, take measures to prevent contact with the other

the lead wires, etc.

(b) Modifying the wireless remote control

i) Remove the battery.

ii) Cut the jumper wire shown in the figure at right.

(5) Flap control

Control the flap by AIRFLOW button on the wireless remote control.

(a) Air scroll

The flap will be automatically set to the angle of air flow best to operation.

(i) Starting time of operation

During cooling and

dry operation

During heating

operation

Cut

(ii) When not operating

The flap returns to the position of air flow directly below, when operation has stopped.

(b) Memory flap

While the flap is operating if the AIRFLOW button is pushed once, it stops swinging at an angle.

As this angle is memorized in the microcomputer, the flap will be automatically set to the angle when next operation is started.

¡ Recommendable stopping angle of the flap

COOL•DRY

Flap moves in upward and downward directions continuously.

Horizontal blowing

HEAT

Slant forward blowing

(6) Comfortable timer setting

If the timer is set at ON when the operation select switch is set at the cooling or heating, or the cooling or heating in auto mode operation

is selected, the comfortable timer starts and determines the starting time of next operation based on the initial value of 15 minutes and the

relationship between the room temperature at the setting time (temperature of room temperature sensor) and the setting temperature.

(Max. 60 minutes)

Operation mode Operation start time correction value (Min.)

At cooling

At heating

Notes (1) At 5 minutes before the timer ON time, operation starts regardless of the temperature of the room temperature sensor (Th1).

(2) This function does not operate when in the Dry or Auto Dry mode.

However, the operation in item (1) does operate in the Auto Dry mode.

(3) During the comfortable timer operation, both the RUN light and TIMER light illuminate and the TIMER light goes off after expiration of the timer, ON setting

time.

(Example) Heating

Setting temperature

Room temperature

3 < Room temp. – Setting temp. 1 < Room temp. – Setting temp. ≤ 3 Room temp. – Setting temp. ≤ 1

+5 No change –5

3 < Setting temp. – Room temp. 2 < Setting temp. – Room temp. ≤ 3 Setting temp. – Room temp. ≤ 2

+5 No change –5

Operation starting time

Corrects the starting time of next operation by calculating the temperature difference.

¡ If the difference (= Setting temperature – Room tempera-

ture) is 4ºC, the correction value is found to be +5 minutes from the table shown above so that the starting time of next operation is determined as follows:

15 min. earlier + 5 min. = 20 min. earlier

↑↑

Current operation Correction value start time

Time

15 min. 10 min. 5 min. earlier earlier earlier

Setting time

(7) Outline of heating operation

(a) Operation of major functional components in heating mode

Item

Functional components

Indoor fan motor ON ON OFF

Flaps ON or OFF ON or OFF Stop position control

Display Lights up Lights up Lights up or flashes

52C ON ON OFF after stop mode

Outdoor fan motor OFF ON OFF

4-way valve

Electronic expansion valve Depending on the EEV control

Solenoid valve OFF OFF OFF

(b) Air flow selection

(i) Speed of inverter changes within the range of selected air flow.

Air flow selection

Auto

MED

Inverter command speed 12~118rps

Air flow Depends on inverter command speed.

Inverter command speed 12~118rps

Air flow Depends on inverter command speed.

Inverter command speed 12~78rps

Air flow Depends on inverter command speed.

Inverter command speed 12~38rps

Air flow 4th speed fixed

When the inverter

speed is 0rps

Depending on the stop mode

Model

When the inverter speed

is other than 0rps

SRK13ZEV-S4

When the inverter speed is 0rps

due to an anomalous stop

Depending on the stop mode

(ii) When the defrosting, protection device, etc. is actuated, operation is performed in the corresponding mode. (iii) Outdoor unit blower operates in accordance with the inverter command speed.

AB 2823 29.5 31.5 34 36 37.5 39 40

AB2931 32 34 40 47

(i) Fuzzy operation

Deviation between the room temperature setting correction temperature and the suction air temperature is calculated in accordance with the fuzzy rule, and used for control of the air capacity and the inverter speed.

(ii) Heating thermostat operation

¡ Operating conditions

If the speed obtained with the fuzzy calculation drops below -24 rps during the heating fuzzy operation, the operation changes to the heating thermostat operation.

¡ Detail of operation

Model

Item

Inverter speed 0rps [Comp. stopped] Indoor fan Hot keep normal mode → 1st speed

Outdoor fan Stop

Flap Horizontal

(iii) Hot keep operation

If the hot keep operation is selected during the heating operation, the indoor blower is controlled based on the temperature of the indoor unit heat exchanger (detected with Th2, indoor unit heat exchanger sensor) to prevent blowing of cool wind.

¡ Normal mode (Normal heating operation, operation after HI POWER completion)

7th speed

Indoor fan

5th speed

4th speed

3rd speed

2nd speed

1st speed

OFF

6th speed

SRK13ZEV-S4

8th speed

¡ Values of A, B

At 0 rps command 22 25

Other than 0 rps command

17 19

Note (1) Refer to the table shown above right for the values A and B.

Indoor heat exchanger temp. (˚C)

¡ Hot keep M mode [During HI POWER operation (for 15 min.)]

7th speed

5th speed

6th speed

¡ Values of A, B

At 0 rps command 22 25

Other than 0 rps command

Indoor fan

4th speed

3rd speed

2nd speed

1st speed

OFF

Indoor heat exchanger temp. (˚C)

Note (1) Refer to the table shown above right for the values A and B.

(iv) Defrosting operation

1) Starting conditions (Defrosting operation can be started only when all of the following conditions are met.)

1 After start of heating operation → When it elapsed 35 minutes. (Accumulated operation time) 2 After end of defrosting operation → When it elapsed 35 minutes. (Accumulated compressor operation time) 3 Outdoor unit heat exchanger sensor (Th4) temperature → When the temperature has been below –2ºC for 3 minutes

continuously.

4 When the temperature difference between the outdoor air temperature sensor and the outdoor unit heat exchanger

sensor temperature exceeded 4.5°C

5 During continuous compressor operation

In addition, when the speed command from the indoor controller of the indoor unit during heating operation has counted 0 rps 10 times or more and all conditions of 1, 2 and 3 above are satisfied (note that when the temperature for Th4 is -2°C or less: 62 rps or more, -1°C or less: less than 62 rps), defrost operation is started.

17 19

Indoor fan

RUN light

Corresponding to speed

OFF

Flashing

(Hot keep)

Outdoor fan

Inverter command

Fuzzy calculated

value

70 rps

Corresponding

to speed

OFF

(1)

4-way valve

OFF

Solenoid valve

Final defrost operation

Defrost control

Hot keep

Indoor unit

Outdoor unit

120 sec.

Hot keep

100 sec.

Normal heating operation restored

Defrost end

(Th4 5˚C, 10 minutes)

Defrost operation

Defrost operation preparation

6th speed 6th speed

> =

2) Operation of functional components during defrosting operation

Depends on inverter command speed

1 speed up

-3

-2

Room temp. - Setting temp. (deg)

Note (1) When outdoor unit heat exchanger sensor (Th4) temperature becomes 2°C or higher, inverter command changes 70 rps to 50 rps.

3) Ending conditions (Operation returns to the heating cycle when either one of the following is met.)

1 Outdoor heat exchanger sensor (Th4) temperature: 5ºC or higher 2 Continued operation time of defrosting → For more than 10 min.

(v) Heating “HI POWER” operation (HI POWER button on remote control: ON)

Operation is maintained for 15 minutes with a higher blow out air temperature.

¡ Detail of operation

Model

Item

Inverter speed 118 rps

Indoor fan Hot keep M mode (max 7th speed)

Outdoor fan 6th speed

Notes (1) Room temperature is not adjusted during the HI POWER operation.

(2) Protective functions will actuate with priority even during the HI POWER operation.

SRK13ZEV-S4

(vi) Heating “JET” operation (JET button on remote control: ON)

1) Detail of operation

Model

Item

Inverter speed 12~122 rps

Air flow Depends on inverter command speed

2) Indoor fan control

The indoor fan is controlled as shown at right in accordance with

the difference between the room temperature and setting

SRK13ZEV-S4

temperature. However, the limit after increasing the speed by 1

speed is 8 speeds.

(8) Outline of cooling operation

(a) Operation of major functional components in cooling mode

Item

Functional components

Indoor fan motor ON ON OFF

Flaps ON or OFF ON or OFF Stop position control

Display Lights up Lights up Lights up or flashes

52C ON ON OFF after stop mode

Outdoor fan motor OFF ON OFF

4-way valve

Electronic expansion valve Depending on the EEV control

Solenoid valve OFF OFF OFF

When the inverter

speed is 0rps

Depending on the stop mode

When the inverter speed

is other than 0rps

OFF

When the inverter speed is 0rps

due to an anomalous stop

Depending on the stop mode

(b) Air flow selection

(i) Speed of inverter changes within the range of selected air flow.

Air flow selection

Auto

MED

Inverter command speed 12~94rps

Air flow Depends on inverter command speed.

Inverter command speed 12~94rps

Air flow Depends on inverter command speed.

Inverter command speed 12~50rps

Air flow Depends on inverter command speed.

Inverter command speed 12~30rps

Air flow 2nd speed fixed.

Model

SRK13ZEVS4

(ii) When any protective function actuates, the operation is performed in the mode corresponding to the function.

(iii) Outdoor blower is operated in accordance with the inverter command speed.

(i) Fuzzy operation

During the fuzzy operation, the air flow and the inverter speed are controlled by calculating the difference between the room

temperature setting correction temperature and the suction air temperature.

(ii) Cooling thermostat operation

1) Operating conditions

During the cooling fuzzy operation or when the speed obtained by the fuzzy calculation is less than -24 rps.

2) Detail of operation

Model

Item

Inverter speed 0 rps [Comp. stopped]

Indoor fan Corresponds to fan speed switch.

Outdoor fan Stop

SRK13ZEV-S4

(iii) Cooling “HI POWER” operation (HI POWER button on remote control: ON)

The unit is operated continuously for 15 minutes regardless of the setting temperature.

1) Detail of operation

Model

Item

Inverter speed 94rps

Indoor fan 7th speed

Outdoor fan 6th speed

Notes (1) Protective functions will actuate with priority even during the “HI POWER” operation.

(2) Room temperature is not adjusted during the “HI POWER” operation

SRK13ZEV-S4

(iv) Cooling “JET” operation (JET button on remote control: ON)

Depends on inverter command speed

1 speed up

Room temp. - Setting temp. (deg)

Low -3 +3 High

Cooling oriented

dehumidifying

Heating oriented

dehumidifying

Reheat dehumidifying

Room temp. _ Setting temp. (deg)

c Range

b Range

a Range

50 55

Humidity (%)

III Range

II Range

I Range

-2

+10-1

Room Temp. – Setting Temp. (deg)

1) Detail of operation

Model

Item

Inverter speed 12~96 rps

Air flow Depends on inverter command speed

SRK13ZEV-S4

2) Indoor fan control

The indoor fan is controlled as shown at right in accordance with the

difference between the room temperature and setting temperature.

However, the limit after increasing the speed by 1 speed is 8 speeds.

(9) Outline of dehumidifying operation

(a) Operation start control

For 20 seconds when each type of dehumidifying starts, during judgment each hour, for 3 minutes when switching operations,

when the indoor fan is at 4th speed, the outdoor fan is at 3rd speed dehumidifying operates and the indoor and outdoor temperatures

are detected. However, during operation, (except when the On timer is in the wait state) each type of dehumidifying operation

starts immediately.

(b) Dehumidifying operation

After implementing operation start control, the operation content is determined in accordance with room temperature and the set

temperature.

If one hour passes following the decision on the dehumidifying operation mode, and after operation start control, the decision is

made for another dehumidification cooling operation, a heating oriented dehumidifying operation or a reheat dehumidifying.

(i) Cooling oriented dehumidifying operation

1) Detail of operation

Model

Item

Inverter speed 60 rps

Indoor fan motor 4th speed

Outdoor fan motor 5th speed

4-way valve OFF

Solenoid valve OFF

Note (1) When a JET operation signal is received from the remote control, the indoor unit’s fan speed is increased by 1 speed.

SRK13ZEV-S4

2) Operation change conditions

After 3 minutes have passed since the start of a cooling oriented dehumidifying operation, when the room setting temperature

becomes less than 0 degree, the dehumidifying operation changes to reheat dehumidifying.

(ii) Reheat dehumidifying

1) Operation range

The operation range is determined in accordance with the room temperature, setting temperature and humidity.

Temperature range

Humidity range a range A range A range B range b range A range B range C range c range B range B range C range

I range II range III range

2) Detail of operation

30 30

Range

3rd speed

1st speed

ON OFF

Outdoor fan motor

Solenoid valve

Indoor fan motor

Inverter speed

12 minutes 12 minutes

Reheat

dehumidifying

control

Reheat

dehumidifying

control

+ 1 speed up

12 minutes

Temperature and humidity check

Reheat dehumidifying

operation range decision

OFF

Range

2nd speed

1st speed

Stop

10 22 248

Outdoor temperature (°C)

Notes (1) If the operation range switches from a range other than the A range to the A range, the command speed is set at 10 rps for 10 seconds.

(2) The indoor unit’s fan speed does not change even if JET operation signals are received from the remote control.

3) Operation change conditions

a) After 12 minutes of a reheat dehumidifying operation have passed, if the room temperature < setting temperature -5

(during gentle dry is -10), after the stop mode is implemented, the operation change to a heating oriented dehumidifying

operation.

b) After 12 minutes of a reheat dehumidifying operation have passed, if the room temperature > setting temperature +5,

after the stop mode is implemented, the operation changes to a cooling oriented dehumidifying operation.

4) Reheat dehumidifying outdoor unit fan control

The outdoor unit’s fan speed is controlled as shown below in accordance with the outdoor temperature.

5) Reheat dehumidifying frost prevention control

a) Operating conditions

After 10 minutes have passed since a speed command other than 0 rps has been output, when either of the following

conditions is satisfied.

1 Indoor unit heat exchanger temperature

2 Indoor unit heat exchanger temperature

b) Detail of operation

1 Command speed: 0 rps

2 Indoor unit fan: 3rd speed

3 Outdoor unit fan: Stopped

c) Reset conditions

Indoor unit heat exchanger temperature: 4ºC or higher.

2ºC or lower continuously for 30 minutes

= <

-1ºC

(iii) Heating oriented dehumidifying

1) Detail of operation

Model

Item

Inverter command speed 80 rps

Indoor unit fan 4th speed

Outdoor unit fan 5th speed

4-way valve ON

Solenoid valve OFF

Notes (1) When a JET operation signal is received from the remote control, the indoor unit fan’s speed is raised 1 speed.

2) Operation change conditions

After 3 minutes have passed since the start of heating oriented dehumidifying, if the room temperature > setting

temperature -1 and the discharge pipe temperature is 50ºC or higher, the stop mode is implemented, then cooling cycle

operation begins and changes to the reheat dehumidifying operation.

3) Cooling cycle operation control

a) Detail of operation

SRK13ZEV-S4

Model

Item

Inverter speed 30 rps

Indoor fan motor OFF

Outdoor fan motor OFF

4-way valve OFF

Solenoid valve OFF

SRK13ZEV-S4

b) Reset conditions

When 6 minutes have passed and the outdoor heat exchanger temperature is

9ºC. However, the maximum operating

time is 9 minutes regardless of the outdoor heat exchanger temperature.

(i) After the operation start control in item (a) is performed, the setting temperature is determined in accordance with the room

temperature.

Setting temperature = Room temperature

However, if the setting temperature becomes

28ºC, the setting temperature upper limit is set at 28ºC. The setting humidity is 55%.

(ii) Determining the operation content

1 Outdoor temperature < 20ºC: Heating oriented dehumidifying regardless of the setting temperature. 2 Outdoor temperature

20ºC:

If the room temperature < setting temperature + 3ºC, operation is in the reheat dehumidifying mode.

If the room temperature

setting temperature + 3ºC, operation is in the cooling oriented dehumidifying mode.

For the dehumidifying operation, see the dehumidifying operation for item (b).

(d) Laundry dry operation control

(i) After the operation start control in item (a) is performed, the setting temperature is determined in accordance with the room

temperature and outdoor temperature.

Setting temperature = Room temperature + 6ºC or the room temperature, whichever is lower.

However, if the setting temperature is

If the setting temperature becomes

20ºC the bottom limit of the setting temperature is 20ºC.

25ºC, the setting temperature upper limit is set at 25ºC. The setting humidity is 40%.

(ii) Determining the operation content

1 Outdoor temperature < 20ºC: Heating oriented dehumidifying regardless of the setting temperature. 2 Outdoor temperature

20ºC: If the room temperature < setting temperature - 3ºC, operation is in the heating oriented

dehumidifying mode.

If the setting temperature – 3ºC

room temperature < setting temperature + 3ºC, operation

is in the reheat dehumidifying mode.

If the room temperature

setting temperature +3°C, operation is in the cooling oriented

dehumidifying mode.

For the dehumidifying operation, see the dehumidifying operation for item (b).

(iii) Stop conditions

1 After 3 hours pass. 2 After 1 hour has passed, when it is judged 4 times to continue reheat dehumidifying in the A range, and it doesn’t occur

the 4th time.

(e) Low temperature dehumidifying protective control (Cooling oriented dehumidifying or reheat dehumidifying)

27.5

25.5

19.5

Inverter command speed

Indoor fan motor

Outdoor fan motor

Flap

Speed 6 Speed 5

0rps

OFF

Depend on the flap control

Speed 3 Speed 2

AUTO HI MED LO

Functional components

Fan speed switching

(i) Operating condition: When the room temperature or outdoor temperature becomes lower than 4ºC.

(ii) Detail of operation

Model

Item

Inverter speed 0 rps

Indoor fan motor 2nd speed

Outdoor fan motor Stop mode

4-way valve Stop mode

Solenoid valve Stop mode

SRK13ZEV-S4

(iii) Reset condition: After 7 minutes have passed.

(10) Outline of automatic operation

(a) Determination of operation mode

The unit checks the room temperature and the outdoor air temperature after operating the indoor and outdoor blowers for 20

seconds, determines the operation mode and the room temperature setting correction value, and then begins in the automatic

operation.

Cooling

Room temperature (˚C)

Heating

Outdoor temperature (˚C)

Dehumidifying

(b) The unit checks the temperature every hour after the start of operation and, if the result of check is not same as the previous

operation mode, changes the operation mode.

(c) When the unit is started again within one hour after the stop of automatic operation or when the automatic operation is selected

during heating, cooling or dehumidifying operation, the unit is operated in the previous operation mode.

(d) Setting temperature can be adjusted within the following range. There is the relationship as shown below between the signals of

the wireless remote control and the setting temperature.

Signals of wireless remote control (Display)

–6 –5 –4 –3 –2 –1 ±0+1+2+3+4+5+6

Setting

temperature

Cooling 18 19 20 21 22 23 24 25 26 27 28 29 30

Dehumidifying 19 20 21 22 23 24 25 26 27 28 29 30 31

Heating 20 21 22 23 24 25 26 27 28 29 30 31 32

(11) Outline of fan operation

(a) Operation of major functional components

(12) ION operation (Ion button on the remote control is ON)

Indoor heat exchanger

temperature (°C)

2.5 5 8

0 rps

12 rps

Inverter

command

speed

Humidity (%)

68 73

A range

B range

Operates

Stopped

Humidity (%)

The negative ion generator operates, generating negative ions.

Operation content

Negative ion generator ON

Indoor

unit fan

ION light Lights up.

Air conditioner operating In accordance with the air conditioner settings

Air conditioner stopped In accordance with fan operation settings

Note (1) The negative ion generator is run and stopped in

accordance with the humidity sensor value.

(13) Protective control function

(a) Dew condensation prevention control [Cooling (including automatic), cooling oriented dehumidifying operation]

(i) Operation conditions: When the following conditions are met after 20 minutes or more of continuous operation after

operation starts.

1) When the inverter command speed is higher than 28 rps.

2) When the humidity sensor value is higher than 68%.

(ii) Detail of operation:

Model

Item

Air flow MED

Air flow LO

Other Settings

Notes (1) The A range and B range are as shown at right.

Upper limit of inverter speed A range: 50 rps, B range: 30 rps

Indoor fan motor 5th speed

Upper limit of inverter speed A range: 50 rps, B range: 30 rps

Indoor fan motor 4th speed

Upper limit of inverter speed A range: 50 rps, B range: 30 rps

Indoor fan motor Depends on inverter speed

(2) There is no 1-speed rise in speed during JET operation control.

SRK13ZEV-S4

(iii) Resets conditions: When either of the following conditions satisfied.

1) The inverter speed is less than 28 rps.

2) The humidity sensor value less than 63%.

(b) Frost prevention for indoor heat exchanger (During cooling or dehumidifying)

(i) Operating conditions

1) Indoor heat exchanger temperature (detected with Th2) is lower than 5ºC.

2) 10 minutes after reaching the inverter command speed except 0 rps.

(ii) Detail of anti-frost operation

Indoor heat exchanger

Item

Indoor command speed 12 rps 0rps

Indoor fan Depends on operation mode 2nd speed

Outdoor fan 4th speed OFF

4-way valve OFF Depends on stop mode

Solenoid valve Depends on operation mode Depends on stop mode

temperature

5°C or lower 2.5°C or lower

(iii) Reset conditions: After 5 minutes of operation,

the indoor heat exchanger temperature (Th2) is 8ºC or higher.

When the air conditioner is operating and the indoor fan motor is turned ON, if the indoor fan motor has operated at 300 rpm or

under for more than 30 seconds, the unit enters first in the stop mode and then stops the entire system.

TIMER light illuminates simultaneously and the RUN light flashing 6 times at each 8-second.

(d) Prevention of continuous low speed operation: For oil return to compressor

(i) Operating condition: When command speed of less than 26 rps continues for 60 minutes

(ii) Detail of operation: The unit is operated at command speed of 30 rps forcibly for 15 seconds. (The indoor and outdoor

fans are not changed.)

Note (1) When the command of exceeding 30 rps is directed during 30 rps forced operation, the unit follows it.

(e) Compressor protection start

(i) When the indoor unit calculated speed is 64 rps or over at operation start, the unit is operated with 64 rps for 1 minute and 45

seconds.

(ii) After (i) above, if the decision speed is 96 rps or higher, it runs for 5 minutes at 96 rps, then changes to the decision speed. (iii) At thermo operation (OFF → ON) this control is not executed.

(iv) The indoor unit fan corresponds to the command speed of each operation mode.

Note (1) When the calculated speed is less than 64 rps, the unit is started with low load starting described in article (f).

(f) Low load starting

(i) When the unit is started with calculated speed of less than 30 rps, it is operated with 30 rps for 60 seconds, then the operation

is moved to the command speed.

(ii) The indoor fan corresponds to the operation mode.

Cooling: Speed corresponding to the command speed of air flow switching

Dehumidification: Speed decided in the operation region

Heating: The lower one between the speed corresponding to the command speed and the hot keep speed

(g) Inching prevention

When the compressor goes into the thermo operation within 3 minutes since operation start or becomes various dehumidifying

operations, the operation is continued with the command speed of 12 rps forcibly.

(h) Current safe

(i) Purpose: Current is controlled not to exceed the upper limit of the setting operation current.

(ii) Detail of operation: Input current to the converter is monitored with the current sensor fixed on the printed circuit board

of the outdoor unit and, if the operation current value reaches the limiting current value, the inverter speed is reduced.

If the mechanism is actuated when the speed of outdoor unit is less than 30 rps, the compressor is stopped immediately.

Operation starts again after a delay time of 3 minutes.

(i) Current cut

(i) Purpose: Inverter is protected from overcurrent.

(ii) Detail of operation: Output current from the converter is monitored with a shunt resistor and, if the current exceeds the

setting value, the compressor is stopped immediately. Operation starts again after a delay time of 3 minutes.

(j) Heating overload protective control

(i) Operating conditions : When the unit is operating with the outdoor unit speed other than 0 rps or when the outdoor air

temperature (detected by Th5) rose beyond 17ºC for 2 minutes continuously.

(ii) Detail of operation

1) Indoor fan speed is raised forcibly by 1 step. However, when the air flow is LO, the fan speed is not raised by 1 step.

2) Taking the upper limit of control speed range at 60 rps, if the output speed obtained with the fuzzy calculation exceeds the

upper limit, the upper limit value is maintained.

3) The outdoor fan is set on 2nd speed.

4) JET operation control does not raise the speed by 1 step

5) The lower limit of control speed is set to 35 rps and even if the calculated result becomes lower than that after fuzzy

calculation, the speed is kept to 35 rps. However, when the thermo becomes OFF, the speed is reduced to 0 prs.

(iii) Reset condition: When the outdoor air temperature drops below 16ºC.

(k) Cooling overload protective control

(i) Operating conditions: When the outdoor unit is operating with the speed of other than 0 rps, or when the outdoor air

temperature (detected by Th5) becomes 41ºC or over for 30 seconds continuously.

(ii) Detail of operation

1) Outdoor fan is stepped up by 3 speed step.

2) The lower limit of control speed is set to 30 rps and even if the calculated result becomes lower than that after fuzzy

calculation, the speed is kept to 30 rps. However, when the thermo becomes OFF, the speed is reduced to 0 rps.

3) The upper limit of control speed is 96 rps.

(iii) Restoration condition: When the outdoor air temperature becomes 40ºC or less

(l) Freezing cycle system protective control

(i) Operating conditions: When both of following conditions have continued for more than 5 minutes later than 5 minutes

after the start of operation.

1) Command speed is higher than 60 rps

2) During cooling, dehumidifying: Indoor heat exchanger temperature - Room temperature > – 4ºC

During heating: Indoor heat exchanger temperature - Room temperature < 6ºC

(ii) Detail of operation

The command speed repeats 30 minutes at 30rps ↔ 2 minutes at 62 rps.

(iii) Restoration conditions: When the condition becomes outside of either conditions 1) or 2) shown above

Note (1) This control is valid when the room air temperature is in the range of 10 to 40ºC at cooling and dehumidification operation and 0 to 40ºC at heating

operation.

(m) Compressor overheat protection

(i) Purpose: It is designed to prevent deterioration of oil, burnout of motor coil and other trouble resulting from the compressor

overheat.

(ii) Detail of operation

1) Speeds are controlled with temperature detected by the sensor mounted on the discharge pipe.

(Example) Fuzzy

After lapse of 3 min. or over

80 90 110

Discharge pipe temperature (˚C)

Notes (1) When the discharge pipe temperature is in the range of 90 to 110ºC, the speed is reduced by 4 rps.

(2) When the discharge pipe temperature is raised and continues operation for 20 seconds without changing, then the speed is reduced again by 4 rps. (3) If the discharge pipe temperature is still 80ºC or greater but less than 90ºC even when the inverter command speed is maintained for 3 minutes when

the temperature is 80ºC or greater but less than 90ºC, the speed is raised by 2 rps and kept at that speed for 3 minutes. This process is repeated until the command speed is reached.

(4) Lower Limit Speed

Cooling Heating

SRK13ZEV-S4 22 38

(3)

Lower limit

(4)

4 rps

(1)

4 rps

0 rps

2) If the temperature of 110ºC is detected by the sensor on the discharge pipe, then the compressor will stop immediately.

When the discharge pipe temperature drops and the time delay of 3 minutes is over, the unit starts again within 1 hour but

there is no start at the third time.

(n) Serial signal transmission error protection

(i) Purpose: Prevents malfunction resulting from error on the indoor ↔ outdoor signals. (ii) Detail of operation: When the indoor unit controller ↔ outdoor unit controller signals cannot be received, the compressor

is stopped immediately. Once the operation stops, it does not start any more.

(TIMER light on the indoor unit flashing at the same time.)

(o) High pressure control

(i) Purpose: Prevents anomalous high pressure operation during heating.

(ii) Detector: Indoor unit heat exchanger sensor (Th2)

(iii) Detail of operation:

(Example) Fuzzy

Notes (1) When the indoor unit heat exchanger temperature is in the range of B~C ºC, the speed is reduced by 8 rps at each 20 seconds. When the temperature is C ºC

or over for 1 minute continuously, the inverter is stopped. (2) When the indoor unit heat exchanger temperature is in the range of A~B ºC, if the inverter command speed is been maintained and the operation has

continued for more than 20 seconds at the same speed, it returns to the normal heating operation. (3) Indoor blower retains the fan tap when it enters in the high pressure control. Outdoor blower is operated in accordance with the speed.

After lapse of 20 Sec. or over

Indoor unit heat exchanger temperature (˚C)

¡ Temperature list

ABC

RPSmin < 88 46 53.5 58.5

RPSmin < 108 41 48.5 53.5

108

RPSmin 36 43.5 48.5

Note (1) RPSmin: The lower one between the outdoor unit speed and the command speed

(2)

Unit : ºC

Lower limit speed 35 rps

8 rps

(1)

8 rps

0 rps

(p) Heating low outdoor temperature protective control

◆ < I > (i) Operating conditions: When the outdoor air temperature sensor (Th5) is 4°C or lower continues for 30 seconds while

outdoor speed is other than 0rps.

(ii) Detail of operation: When the inverter command speed is less than 22rps, the speed is forcibly set at 22rps. However,

when the thermo becomes OFF, the speed is reduced to 0rps.

(iii) Reset condition: When the outdoor air temperature sensor (Th5) becomes 6°C or higher.

◆ < II > (i) Operating conditions: When the outdoor air temperature sensor (Th5) is 0°C or lower continues for 5 minutes while

outdoor speed is other than 0rps.

(ii) Detail of operation: Outdoor fan is stepped up by 1 speed step. (Upper limit 7th speed) (iii) Reset condition: When the outdoor air temperature sensor (Th5) becomes 2°C or higher.

◆ < III >

(i) Operating conditions: When the outdoor unit is operating with the speed of other than 0rps, and when the outdoor heat

exchanger temperature (Th4) is less than -10°C for 1 minutes.

(ii) Detail of operation:

1 Outdoor air temperature

-7°C: The upper limit of inverter command speed is 60 rps.

2 Outdoor air temperature > -7°C: The upper limit of inverter command speed is 70 rps.

(iii) Reset conditions: When the either of the following conditions is satisfied

1 When the outdoor heat exchanger temperature (Th4) becomes -7°C or higher.

2 When the inverter command speed is 0rps.

(q) Prevention of continuous low speed operation: For oil return to compressor

Function Operation

Heating,

heating oriented dehumidifying

Heating,

heating oriented dehumidifying

Cooling,

cooling oriented dehumidifying

Cooling,

cooling oriented dehumidifying

When stopped by indoor unit controller

Reheat

dehumidifying

Reheat

dehumidifying

When stopped or reset by outdoor unit protective function

Inverter

speed

3 min.

6 th speed 6 th speed 6 th speed

6 th speed

6 th speed 6 th speed

3 min. 3 min.

2 min.

55 sec.

2 min.

45 sec.

2 min.

45 sec.

4 min. 40 sec.

2 min.

55 sec.

1 min 1 min 1 min 1 min 1 min

1st speed

1 min

2 min.

55 sec.

2 min.

55 sec.

Indoor

fan

Outdoor

fan

4-way valve

Solenoid

valve

Stop

Full stop

[0 rps command]

Stop

Full stop

[0 rps command]

Stop

Full stop

[0 rps command]

Stop

Restart

[0 rps command]

Stop

Restart

[0 rps command]

Stop

Restart

[0 rps command]

OFF

Command speed

0 rps

Speed dependent

OFF

Speed responsive

or reheat

dehumidifying

control

Indoor

power

relay

Hot keep

(i) Operating condition: When inverter command speed of less than 26 rps continues for 60 minutes

(ii) Detail of operation: The unit is operated at inverter command speed of 30 rps forcibly for 15 seconds. (The indoor and

outdoor fans are not changed.)

Note (1) When the inverter command of exceeding 30 rps is directed during 30 rps forced operation, the unit follows it.

(r) Outdoor fan motor protection

If the outdoor fan motor has operated at 75rpm or under for more than 30 seconds, the inverter and fan motor are stopped.

(s) Stop mode

(i) Operating conditions: When the operation mode is changed, when the dehumidifying operation is changed from the

heating oriented mode to the cooling oriented mode or vice versa, or when the dehumidifying operation is changed from

reheat dehumidifying to the heating or when the inverter speed turns to 0 rps. [When 0 rps is commanded from the indoor unit

controller, or when an outdoor protective function is actuated]

(ii) Detail of operation

1.5 APPLICATION DATA SAFETY PRECAUTIONS

¡ Please read these “Safety Precautions” first then accurately execute the installation work. ¡ Though the precautionary points indicated herein are divided under two headings, WARNING and CAUTION , those points

which are related to the strong possibility of an installation done in error resulting in death or serious injury are listed in the

WARNING section. However, there is also a possibility of serious consequences in relationship to the points listed in the

CAUTION section as well. In either case, important safety related information is indicated, so by all means, properly observe all

that is mentioned.

¡ After completing the installation, along with confirming that no abnormalities were seen from the operation tests, please explain

operating methods as well as maintenance methods to the user (customer) of this equipment, based on the owner’s manual.

Moreover, ask the customer to keep this sheet together with the owner’s manual.

WARNING

¡ To disconnect the appliance from the mains supply this appliance must be connected to the mains by means of a circuit

breaker or a switch (use a recognized 16A) with a contact separation of at least 3mm.

¡ The appliance shall be installed in accordance with national wiring regulations. ¡ This system should be applied to places as households, residences and the like. Application to inferior environment

such as engineering shop could cause equipment malfunction.

¡ Please entrust installation to either the company which sold you the equipment or to a professional contractor. Defects

from improper installations can be the cause of water leakage, electric shocks and fires.

¡ Execute the installation accurately, based on following the installation manual. Again, improper installations can result

in water leakage, electric shocks and fires.

¡ For installation, confirm that the installation site can sufficiently support heavy weight. When strength is insufficient,

injury can result from a falling of the unit.

¡ For electrical work, please see that a licensed electrician executes the work while following the safety standards

related to electrical equipment, and local regulations as well as the installation instructions, and that only exclusive use circuits are used. Insufficient power source circuit capacity and defective installment execution can be the cause of electric shocks and fires.

¡ Accurately connect wiring using the proper cable, and insure that the external force of the cable is not conducted to the terminal

connection part, through properly securing it. Improper connection or securing can result in heat generation or fire.

¡ Ta ke care that wiring does not rise upward, and accurately install the lid/service panel.It’s improper installation can also

result in heat generation or fire.

¡ When setting up or moving the location of the air conditioner, do not mix air etc. or anything other than the designated

refrigerant (R410A) within the refrigeration cycle. Rupture and injury caused by abnormal high pressure can result from such mixing.

¡ Always use accessory parts and authorized parts for installation construction. Using parts not authorized by this company

can result in water leakage, electric shock, fire and refrigerant leakage.

¡ Ventilate the work area when refrigerant leaks during the operation.

Coming in contact with fire, refrigerant could generate toxic gas.

¡ Confirm after the foundation construction work that refrigerant does not leak.

If coming in contact with fire of a fan heater, a stove or movable cooking stove, etc., refrigerant leaking in the room could generate toxic gas.

¡ In joining pipes, do not use conventional (R22) pipng flare nuts, etc. The use of conventional pipng materials may lead

to the rapture of piping due to higher pressure used for the refrigerant cycle and possible personal injury. (Use only piping material designed specifically for R410A)

¡ Execute proper grounding. Do not connect the ground wire to a gas pipe, water pipe, lightning rod or a telephone

ground wire. Improper placement of ground wires can result in electric shock.

¡ The installation of an earth leakage breaker is necessary depending on the established location of the unit.

Not installing an earth leakage breaker may result in electric shock.

¡ Do not install the unit where there is a concern about leakage of combustible gas.

The rare even of leaked gas collecting around the unit could result in an outbreak of fire.

¡ For the drain pipe, follow the installation manual to insure that it allows proper drainage and thermally insulate it to

prevent condensation. Inadequate plumbing can result in water leakage and water damage to interior items.

¡ Install the outdoor unit so that the aluminum fins on the air heat exchanger cannot be touched. Failure to observe this

may result in injury.

¡ Do not place objects near the outdoor unit or allow leaves to gather around the unit. If there are objects or leaves around the

outdoor unit, small animals may enter unit and contact electrical parts resulting in break down, emission of smoke or flame.

CAUTION

(1) Selection of location for installation

5 cm

10 cm

1.5 cm

6.5 cm

(a) Indoor unit

(i) Where there is no obstructions to the air flow and where the cooled

air can be evenly distributed.

(ii) A solid place where the unit or the wall will not vibrate.

(iii) A place where there will be enough space for servicing. (Where

space mentioned below can be secured)

(iv) Where wiring and the piping work will be easy to conduct.

(v) The place where receiving part is not exposed to the direct rays of

the sun or the strong rays of the street lighting.

(b) Outdoor unit

(i) A place where good air circulation can be obtained and where rain, snow or sunshine will not directly strike the unit.

(ii) A place where discharged hot air or unit’s operating sound will not be a nuisance to the neighborhood.

(iii) A place where servicing space can be secured.

(iv) A place where vibration will not be enlarged.

(v) Do not install the unit near the seaside, or where there is possibility of chlorine gas generation.

Left side

Right side

100

Air inlet

Air Outlet

100

600

No obstacles (Service space for electrical parts)

Unit : mm

Notes (1) Blowing out port and suction port on the back side of the unit can be

(2) When the unit is installed, the space of the following dimension and

(vi) In heating operation, snow deposit on the heat-exchanger of outdoor unit must be

prevented for keeping the normal performance capacity.

1) Snow-hood on outdoor unit as in drawing, will reduce the frequency of defrost

operation.

When installing the snow hood, take care so that the air outlet of the snow

hood will not face directly into the most windy direction.

2) Design the base higher than possible snow deposit.

height difference.

Model

Item One way piping length (R) 25 m

Outdoor Vertical height difference (h)

unit is lower

Outdoor unit

is higher

SRK13ZEV-S4

15 m

installed at a distance of 10cm from walls.

In case the barrier is 1.2m or above in height, or is overhead, the

()

sufficient space between the unit and wall shall be secured.

above shall be secured.

Snow hood

Height: Must be over the possible snow deposit height

(2) Installation of indoor unit

Look for the inside wall structures (Intersediate support or pillar and firaly install the unit after level surface has been checked.)

Mating mark for level surface

450

450207.5

53.5

63.5

182.5

693

50 50

73.5 73.5

100

8.5284.25.3

44.5

47.5220.5

40 Speace

for service

15 Speace

for service

Speace for service

Speace for

service

Indoor unit

Installation board

Piping hole (ø65) Piping hole (ø65)

Drain hose 515 (ø16)

Piping for liquid 603.5

Piping for Gas 533.5

INSTALLATION SPACE (INDOOR UNIT) (FRONT VIEW)

Unit : mm

(a) Installation of installation board

(i) Fixing of installation board

Adjustment of the installation board in the horizontal

direction is to be conducted with four screws in a

temporary tightened state.

Standard hole

Adjust so that board will be level by turning the board

with the standard hole as the center.

(b) Drilling of holes and fixture sleeve (Option parts)

When drilling the wall that contains a metal lath, wire lath or metal plate, be sure to use pipe hole sleeve sold separately.

(i) Drill a hole with ø65

whole core drill

Indoor side Outdoor side

Note (1) Drill a hole with incline of 5 degree from

indoor side to outdoor side.

(iii) Install the sleeve

(Inserting sleeve) (*Sleeve + *Inclined + *Sealing plate)

Indoor side

Paste

Fixing on concrete wall

Use of nut anchor Use of bolt anchor

Bolt (M6 × 12)

Mounting board

Nut (M6)

Mounting board

(ii) Adjusting sleeve length

Cut off the sleeve collar in case of drawing piping out to rear.

Cut off the sleeve collar that can be seen from beneath the unit.

View of sleeve when installed

Turn to tighten

Outdoor side

Sleeve

Indoor side Outdoor side

Max. 10

Wall thickness

Inclined flange

Sealing plate

+ 1.5 cm

(i) Mounting of connecting wires

1) Remove the lid.

2) Remove the wiring clamp.

3) Connect the connecting wire securely to the terminal block.

Use cables for interconnection wiring to avoid loosening of the wires. CENELEC code for cables. Required field cables. H05RNR3G1.5 (Example) or 245IEC57

H Harmonized cable type

05 300/500 volts

R Natural-and/or synth, rubber wire insulation N Polychloroprene rubber conductors insulation R Standed core

4or5 Number of conductors

G One conductor of the cable is the earth conductor (yellow/

green)

1.5 Section of copper wire (mm2)

1 Connect the connection wire securely to the terminal block. If the wire is not affixed completely, contact will be poor,

and it is dangerous as the terminal block may heat up and catch fire.

2 Take care not to confuse the terminal numbers for indoor and outdoor connections.

3 Affix the connection wire using the wiring clamp.

4) Fix the connecting wire by wiring clamp.

5) Attach the lid.

6) Close the air inlet grille.

(ii) Installing the support of piping

[Shaping the piping] [Taping of the exterior]

Piping

Terminal block

Clamp

Lid

Drain hose

¡ Hold the bottom of the piping and fix direction before

stretching it and shaping it.

¡ Tape only the portion that goes through the wall.

Always tape the crossover wiring with the piping.

[When the hose is extended to left and taken out from the rear center]

[Top View]

Left-hand-sided-piping Right-hand-sided-piping

Piping in the left rear direction

Piping in the left direction

Piping in the right rear direction

Piping in the right direction

Piping is possible in the rear, left, left rear, left downward, right or downward direction.

Right

Rear

Downward

Left rear

Left downward

Left

[Drain hose changing procedures]

1. Remove the drain hose.

2. Remove the drain cap. 3. Insert the drain cap. 4. Connect the drain hose.

¡Remove the drain hose,

making it rotate.

¡Remove it with hand or

pliers.

¡Insert the drain cap which was removed at

proce-dure “2” securely using a hexagonal wrench, etc. Note: Be careful that if it is not inserted securely, water leakage may occur.

Gutter

¡Insert the drain hose

securely, makingit rotate. Note: Be careful that if it is not inserted securely, water leakage may occur.

Since this air conditioner has been designed to collect dew drops on the rear surface to the drain pan, do not attach the power cord above the gutter.

Pipe accommodation section

Drainage

¡ Arrange the drain hose in a downward angle. ¡ Avoid the following drain piping.

Odor from the gurtter

Higher than specified The drain hose

tip is in water.

Weavy The gap to the ground

is 5 cm or less.

The drain hose tip is in the gutter.

¡ Pour water to the drain pan located under the heat exchanger, and ensure that the water is discharged outdoor. ¡ When the extended drain hose is indoor, always use a shield pipe (to be arranged by the user) and ensure it is thermally

insulated.

Shield pipe

When it is exposed indoor.Drain hose

(iii) Fixing of indoor unit

Indoor unit

Latch (2 locations)

Installation board

Indoor unit base lower latch

Wall

Installation board

¡ How to remove the indoor unit from the installation board

1 Remove the right and left lids. 2 At the marked portion of the indoor unit base lower latch,

pull downward with fingers.

(both right and left hand sides)

(The indoor unit base lower latch can be removed from the

installation board)

Extended drain hose

Installation Steps

1 Pass the pipe through the hole

in the wall, and hook the upper part of the indoor unit to the installation board.

2 Gently push the lower part to

secure the unit.

Lid (left)

The marked portion of the indoor unit base lower latch

Lid (right)

+ 115 hidden pages

Mitsubishi Heavy Industries SRK13ZEV-S4, SRK22ZEV-S4 Technical Manual

Specifications and Main Features

Frequently Asked Questions

User Manual