MITSUBISHI ELECTRIC PKFY-WL04NLMU-E Split Type Heat Pump Air Conditioners Instruction Manual

: June 17, 2024
: Mitsubishi Electric

Table of Contents

PKFY-WL04NLMU-E Split Type Heat Pump Air Conditioners
Product Information: Split-Type Heat Pump Air Conditioners
Specifications:
Product Usage Instructions:
1. Safety Precaution:
2. Parts Names and Functions:
Q: What refrigerant should I use when installing or relocating
Q: Can I defeat the safety features of the unit?
Q: What should I do if I detect a refrigerant leak?

PKFY-WL04NLMU-E Split Type Heat Pump Air Conditioners

Product Information: Split-Type Heat Pump Air Conditioners

Specifications:

Model Names: PKFY-WL04NLMU-E, PKFY-WL06NLMU-E, PKFY-WL08NLMU-E,
PKFY-WL12NLMU-E, PKFY-WL15NLMU-E
Service References: PKFY-WL04NLMU-E.TH, PKFY-WL06NLMU-E.TH,
PKFY-WL08NLMU-E.TH, PKFY-WL12NLMU-E.TH, PKFY-WL15NLMU-E.TH

Product Usage Instructions:

1. Safety Precaution:

Before installation and performing electrical work, please
thoroughly read the following safety precautions:

Ensure to contact the local power authority before connecting
to the system as this equipment may have adverse effects on the
equipment on the same power supply system.
WARNING: Failure to follow the instructions
exactly as stated poses the risk of serious injury or death.
CAUTION: Failure to follow the instructions
exactly as stated poses the risk of serious injury or damage to the
unit.
Take caution with rotating parts and parts that require
grounding.
Avoid wetting electrical parts as they pose a risk of electric
shock, smoke, or fire.
Ensure the control box cover is securely attached to prevent
dust or water infiltration that may pose a risk of electric shock,
smoke, or fire.
Only use the type of refrigerant indicated on the unit when
installing or relocating to avoid adverse effects on the
refrigerant cycle and potential pipe damage.
Consult your dealer or a qualified technician for moving or
reinstalling the unit to prevent improper installation leading to
water leakage, electric shock, or fire.
After completing service work, check for refrigerant leaks as
leaked refrigerant exposed to a heat source can generate toxic
gases.
Do not try to defeat the safety features of the unit as forced
operation or use of unauthorized accessories may result in smoke,
fire, or explosion.
Consult your dealer for proper disposal methods when
needed.
Avoid using leak detection additives.

2. Parts Names and Functions:

2-1. Indoor Unit:

Front Panel
Filter
Air intake
Emergency operation switch
Vane Louver
Air outlet
Operation indicator lamp
Remote control receiving section

2-2. Wired Remote Controller:

The functions of the wired remote controller vary according to
each model.

FAQ:

Q: What refrigerant should I use when installing or relocating

the unit?

A: Only use the type of refrigerant that is indicated on the
unit to avoid adverse effects on the refrigerant cycle and
potential pipe damage.

Q: Can I defeat the safety features of the unit?

A: No, it is strongly advised not to defeat the safety features
of the unit as forced operation or use of unauthorized accessories
may result in smoke, fire, or explosion.

Q: What should I do if I detect a refrigerant leak?

A: After completing service work, check for refrigerant leaks.
If leaked refrigerant is exposed to a heat source, such as a fan
heater, stove, or electric grill, toxic gases will be generated. It
is recommended to consult a qualified technician for proper
disposal methods.

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
TECHNICAL & SERVICE MANUAL

July 2023
No. TCH122

Indoor unit [Model Name] PKFY-WL04NLMU-E PKFY-WL06NLMU-E PKFY-WL08NLMU-E PKFY- WL12NLMU-E PKFY-WL15NLMU-E

[Service Ref.] PKFY-WL04NLMU-E.TH PKFY-WL06NLMU-E.TH PKFY-WL08NLMU-E.TH PKFY- WL12NLMU-E.TH PKFY-WL15NLMU-E.TH

INDOOR UNIT

Model name indication

CONTENTS
1. SAFETY PRECAUTION ······················· 2 2. PARTS NAMES AND FUNCTIONS ········ 3 3. SPECIFICATION ································ 4 4. NOISE CRITERION CURVES ··············· 6 5. OUTLINES AND DIMENSIONS ············· 8 6. WIRING DIAGRAM ··························· 12 7. REFRIGERANT SYSTEM DIAGRAM ··· 13 8. MICROPROCESSOR CONTROL········· 13 9. TROUBLESHOOTING ······················· 20 10. DISASSEMBLY PROCEDURE ············ 27 11. REMOTE CONTROLLER ··················· 31
PARTS CATALOG (TCB122)

1 SAFETY PRECAUTION

Read before installation and performing electrical work

Thoroughly read the following safety precautions prior to installation. Observe these safety precautions for your safety. This equipment may have adverse effects on the equipment on the same power supply system. Contact the local power authority before connecting to the system.
Symbol explanations

WARNING
This symbol indicates that failure to follow the instructions exactly as stated poses the risk of serious injury or death.
CAUTION
This symbol indicates that failure to follow the instructions exactly as stated poses the risk of serious injury or damage to the unit.
Indicates an action that must be avoided.
Indicates important instructions.
Indicates a parts that requires grounding. Indicates that caution must be taken with rotating parts. (This symbol is on the main unit label.) <Color: Yellow> Indicates that the parts that are marked with this symbol pose a risk of electric shock. (This symbol is on the main unit label.)

Keep electrical parts away from water.
– Wet electrical parts pose a risk of electric shock, smoke, or fire. Securely attach the control box cover. – If the cover is not installed properly, dust or water may infiltrate and pose a
risk of electric shock, smoke, or fire. Only use the type of refrigerant that is indicated on the unit when installing or relocating the unit. – Infiltration of any other types of refrigerant or air into the unit may adversely
affect the refrigerant cycle and may cause the pipes to burst or explode. Consult your dealer or a qualified technician when moving or reinstalling the unit. – Improper installation may result in water leakage, electric shock, or fire. After completing the service work, check for a refrigerant leak. – If leaked refrigerant is exposed to a heat source, such as a fan heater, stove,
or electric grill, toxic gases will be generated. Do not try to defeat the safety features of the unit. – Forced operation of the pressure switch or the temperature switch by defeat-
ing the safety features for these devices, or the use of accessories other than the ones that are recommended by Mitsubishi Electric may result in smoke, fire, or explosion. Consult your dealer for proper disposal method. Do not use a leak detection additive.
Precautions for handling units for use with water

WARNING
Carefully read the labels affixed to the main unit.
WARNING
Do not use refrigerant other than the type indicated in the manuals provided with the unit and on the nameplate. – Doing so may cause the unit or pipes to burst, or result in explosion or fire during use, during repair, or at the time of disposal of the unit. It may also be in violation of applicable laws. MITSUBISHI ELECTRIC CORPORATION cannot be held responsible for malfunctions or accidents resulting from the use of the wrong type of refrigerant. Ask your dealer or a qualified technician to install the unit. – Improper installation by the user may result in water leakage, electric shock, or fire. Properly install the unit on a surface that can withstand its weight. – Unit installed on an unstable surface may fall and cause injury. Only use specified cables. Securely connect each cable so that the terminals do not carry the weight of the cable. – Improperly connected cables may produce heat and start a fire. Take appropriate safety measures against wind gusts and earthquakes to prevent the unit from toppling over. – Improper installation may cause the unit to topple over and cause injury or damage to the unit. Only use accessories (i.e., air cleaners, humidifiers, electric heaters) recommended by Mitsubishi Electric. Do not make any modifications or alterations to the unit. Consult your dealer for repair. – Improper repair may result in water leakage, electric shock, or fire. Do not touch the heat exchanger fins with bare hands. – The fins are sharp and pose a risk of cuts. Properly install the unit according to the instructions in the Installation Manual. – Improper installation may result in water leakage, electric shock, or fire. Have all electrical work performed by an authorized electrician accord-ing to the local regulations and the instructions in this manual. Use a dedicated circuit. – Insufficient power supply capacity or improper installation of the unit may re-sult in malfunctions of the unit, electric shock, or fire.

CAUTION
Do not use the existing water piping. – Store the piping materials indoors, and keep both ends of the pipes sealed until immediately before installation. Keep the joints wrapped in plastic bags. If dust or dirt enters the water circuit, it may damage the heat exchanger and cause water leakage. Only use water. – Only use clean water as a refrigerant. The use of water outside the specification may damage the refrigerant circuit. Install the unit so that external force is not applied to the water pipes.

TCH122

2 PARTS NAMES AND FUNCTIONS
2-1. Indoor unit

Front Panel

Filter

Air intake

Emergency operation switch

Vane Louver

Air outlet

Operation indicator lamp
Remote control receiving section

2-2. Wired Remote Controller
Wired remote controller function The functions which can be used are restricted according to each model.

Function

Body
Energy saving Restriction Function*

Product size H × W × D
LCD Backlight

(mm) (inch)

Energy saving operation schedule

Automatic return to the preset temperature

Setting the temperature range restriction

Operation lock function

Weekly timer

ON/OFF timer

High Power

Manual vane angle

*Some functions may not be available depending on model types.

: Supported : Unsupported

PAR-41MAA

Slim

CITY MULTI

120 × 120 × 14.5 4-3/4 × 4-3/4 × 9/16

Full Dot LCD

TCH122

3 SPECIFICATION

3-1. SPECIFICATIONS

Model

PKFY-WL04NLMU-E.TH PKFY-WL06NLMU-E.TH PKFY-WL08NLMU-E.TH PKFY-WL12NLMU-E.TH PKFY-WL15NLMU-E.TH

Power source

1-phase 208/230 V 60Hz

Cooling capacity

1 BTU/h 1 kW

4,000 1.2

6,000 1.8

8,000 2.3

12,000 3.5

15,000 4.4

Power input

0.02

0.03

0.04

0.05

Current input

0.20

0.25

0.35

0.45

Heating capacity

2 BTU/h 2 kW

4,500 1.3

6,700 2.0

9,000 2.6

13,500 4.0

17,000 5.0

Power input

0.01

0.02

0.03

0.04

Current input

0.15

0.20

0.30

0.40

External finish

Plastic, MUNCELL (0.7PB 9.2/0.4)

External dimension

inch

H × W × D

11-25/32 × 30-7/16 × 9-11/32 299 × 773 × 237

11-25/32 × 35-3/8 × 9-11/32 299 × 898 × 237

Net weight

lbs (kg)

24 (11)

29 (13)

Heat exchanger

Cross fin (Aluminum fin and copper tube)

Water volume L

0.6

0.7

1.0

1.1

FAN

Type × Quantity

Line flow fan × 1

External static in.WG

press.

Motor type

DC motor

Motor output

0.030

Driving mechanism

Direct-driven

Airflow rate

cfm 117 – 134 – 145 – 159 141 – 177 – 212 – 247 141 – 191 – 247 – 297 222 – 268 – 318 – 367 226 – 290 – 353 – 420

(Low-Mid2-Mid1-High) K/min 3.3 – 3.8 – 4.1 – 4.5 4.0 – 5.0 – 6.0 – 7.0 4.0 – 5.4 – 7.0 – 8.4 6.3 – 7.6 – 9.0 – 10.4 6.4 – 8.2 – 10.0 – 11.9

L/s

55 – 63 – 68 – 75 67 – 83 – 100 – 117 67 – 90 – 117 – 140 105 – 127 – 150 – 173 107 – 137 – 167 – 198

Sound pressure level

(Low-Mid2-Mid1-High)

dB 22 – 26 – 28 – 30

(measured in anechoic room)

22 – 28 – 33 – 36

22 – 30 – 36 – 41

29 – 34 – 38 – 41

30 – 36 – 41 – 45

Insulation material

Polyethyene sheet

Air filter

PP honeycomb

Protection device

Fuse

Refrigerant control device

—

Connectable HBC controller

CMB-WP-NU-AA, CMB-WP-NU-AB

Water Connection Inlet mm O.D.

piping size

Outlet mm O.D.

diameter 3,4

Field pipe size

Inlet mm I.D. Outlet mm I.D.

20 20

Field drain pipe size

inch (mm)

I.D. 5/8 (16)

Drawing External

VK01B214

Wiring

VG79N339

Refrigerant cycle

—

standard Document attachment Accessory

Installation Manual, Instruction Book
Mount board, Screw, Felt tape, L-shape connection pipe, I-shape connection pipe, Insulation, Tie band

Optional Drain pump

parts

External heater adapter

PAC-SK01DM-E PAC-YU25HT

Remarks

Details on foundation work, duct work, insulation work, electrical wiring, power source switch, and other items shall be referred to the Installation Manual.
Due to continuing improvement, above specifications may be subject to change without notice.

Notes: 1. Norminal cooling conditions
Indoor: 80°FD.B./67°FW.B. (26.7°D.B./19.4°CW.B.), Outdoor: 95°FD.B. (35°CD.B.) Pipe length: 25 ft. (7.6 m), Level difference: 0 ft. (0 m) 2. Norminal heating conditions Indoor: 70°FD.B. (21.1°C.B.), Outdoor: 47°FD.B./43°FW.B. (8.3°CD.B./6.1°CW.B.) Pipe length: 25 ft. (7.6 m), Level difference: 0 ft. (0 m) 3. Be sure to install a valve on the water inlet/outlet. 4. Install a strainer (40 mesh or more) on the pipe next to the valve to remove the foreign matters.

Unit converter
Btu/h = kW × 3,412 cfm = m³/min × 35.31 lb = kg/0.4536 *Above specification data is subject to rounding variation.

TCH122

3-2. ELECTRICAL PARTS SPECIFICATIONS

Parts

Service name

Ref.

Symbol

PKFY-WL04NLMU-E.TH PKFY-WL06NLMU-E.TH PKFY-WL08NLMU-E.TH

PKFY-WL12NLMU-E.TH PKFY-WL15NLMU-E.TH

Room temperature detection thermistor

TH21

Resistance 32°F/15 k”, 50°F/9.6 k”, 68°F/6.3 k”, 77°F/5.4 k”, 86°F/4.3 k”, 104°F/3.0 k”

Pipe temperature detection thermistor/liquid

TH22

Resistance 32°F/15 k”, 50°F/9.6 k”, 68°F/6.3 k”, 77°F/5.4 k”, 86°F/4.3 k”, 104°F/3.0 k”

Pipe temperature detection thermistor/gas

TH23

Resistance 32°F/15 k”, 50°F/9.6 k”, 68°F/6.3 k”, 77°F/5.4 k”, 86°F/4.3 k”, 104°F/3.0 k”

Fuse (Indoor controller board)

FUSE

T3.15AL250V

Fan motor (with thermal fuse)

8 X 30W / RC0J30-CV

Vane motor (Upper)

MV1

MSBPC20 DC12V

Vane motor (Lower)

MV2

MSBPC20 DC12V

Power supply terminal block

TB2

(L1, L2) Rated to 250V 20A *

Transmission terminal block

TB5

(M1, M2, S) Rated to 250V 20A *

MA-Remote controller terminal block

TB15

(1, 2) Rated to 250V 10A *

*Refer to WIRING DIAGRAM for the supplied voltage.

3-3. SOUND PRESSURE LEVEL
PKFY-WLNLMU-E

Measurement location

Measured in anechoic room.

Model name

Sound pressure level at anechoic room : Low-Mid2-Mid1-High Sound pressure level dB (A)

PKFY-WL04NLMU-E.TH

22-26-28-30

PKFY-WL06NLMU-E.TH

22-28-33-36

PKFY-WL08NLMU-E.TH

22-30-36-41

PKFY-WL12NLMU-E.TH

29-34-38-41

PKFY-WL15NLMU-E.TH

30-36-41-45

TCH122

4 NOISE CRITERION CURVES

NOISE CRITERION CURVES

PKFY-WL04NLMU-E.TH FAN SPL(dB) LINE

High

Medium1 28

Medium2 26

Low

OCTAVE BAND SOUND PRESSURE LEVEL, dB0dB=0.0002bar)

70 NC-70

60 NC-60

50 NC-50

40 NC-40

30 NC-30

20
Approximate minimum audible limit on continuous noise

NC-20

10 63

125 250 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES, Hz

PKFY-WL08NLMU-E.TH FAN SPL(dB) LINE

High

Medium1 36

Medium2 30

Low

OCTAVE BAND SOUND PRESSURE LEVEL, dB0dB=0.0002bar)

PKFY-WL06NLMU-E.TH FAN SPL(dB) LINE

High

Medium1 33

Medium2 28

Low

70 NC-70

60 NC-60

50 NC-50

40 NC-40

30 NC-30

20
10 63

Approximate minimum audible limit on continuous noise
125 250 500 1000 2000 4000 BAND CENTER FREQUENCIES, Hz

NC-20 8000

PKFY-WL12NLMU-E.TH FAN SPL(dB) LINE

High

Medium1 38

Medium2 34

Low

OCTAVE BAND SOUND PRESSURE LEVEL, dB0dB=0.0002bar)

70 NC-70

60 NC-60

50 NC-50

40 NC-40

30 NC-30

20
Approximate minimum audible limit on continuous noise

NC-20

10 63

125 250 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES, Hz

TCH122

70 NC-70

60 NC-60

50 NC-50

40 NC-40

30 NC-30

20
Approximate minimum audible limit on continuous noise

NC-20

10 63

125 250 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES, Hz

OCTAVE BAND SOUND PRESSURE LEVEL, dB0dB=0.0002bar)

PKFY-WL15NLMU-E.TH FAN SPL(dB) LINE

High

Medium1 41

Medium2 36

Low

70 NC-70

60 NC-60

50 NC-50

40 NC-40

30 NC-30

20
Approximate minimum audible limit on continuous noise

NC-20

10 63

125 250 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES, Hz

TCH122

5 OUTLINES AND DIMENSIONS

PKFY-WL04NLMU-E.TH PKFY-WL08NLMU-E.TH

PKFY-WL06NLMU-E.TH

Unit: inch(mm)

TCH122

PKFY-WL04NLMU-E.TH PKFY-WL08NLMU-E.TH

PKFY-WL06NLMU-E.TH

Unit: inch(mm)

TCH122

PKFY-WL12NLMU-E.TH

PKFY-WL15NLMU-E.TH

Unit: inch(mm)

TCH122

PKFY-WL12NLMU-E.TH

PKFY-WL15NLMU-E.TH

Unit: inch(mm)

TCH122

6 WIRING DIAGRAM

PKFY-WL04NLMU-E.TH PKFY-WL12NLMU-E.TH

PKFY-WL06NLMU-E.TH PKFY-WL15NLMU-E.TH

PKFY-WL08NLMU-E.TH

TO NEXT

INDOOR

UNIT

TB2

PULL

BOX

FUSE(15A)

*3
POWER SUPPLY 208/230V AC 60Hz

1 CND

BK BU RD

TO MA-REMOTE CONTROLLER DC8.7-13V
MF MS 3~

When attaching drain pump(option), remove the jumper connector CN4F and fit the drain float switch (FS).
TB15 1 2
D.P
DP MS 3~ 33 1
3

D.P
When attaching drain pump (option) FS
FLOAT SW CN4F

TB5

TO OUTDOOR UNIT

HBC/ HYDRO UNIT ME REMOTE

CONTROLLER

DC24-30V

(SHIELD)

TH21 TH22 TH23

t° t° t°

<Fig.*1>
The black square() indicates a switch position.

Models

SW2

OFF WL04
ON 654321

WL06 OFF ON 654321

OFF WL08 ON
654321

CNP 31
CNSA 10

CN2A 21 CNRU
1

LED2

CN41 8

21
CN2M CN8A 1
1

I.B

CN51

CN52

CNSB

71 3

CNMF

CN4F BZ1
3 1 1 21

SWE 4 OFF ON 1

CN32 CN20 CN44 CN24

CN105 5

Models

SW2

OFF WL12 ON
654321

OFF WL15 ON
654321

~ ~

W.B REC1

CN301 3

SWE2 SWE1

S.B

CN303 1

15 CNV
16

5 1
25

654321

OFF ON

SW2 2

4321

109 8 7 6 5 4 3 2 1

OFF ON

SW22

OFF ON

SW3

11 CNAD
12

LED1

See Fig. *1

3 CN302

L.B

LED1 LED2

10
55 MM
MV1 MV2
4 8

A.B

3456 12 3
23

7 89A

SW12
6 78
10s DIGIT SW11
6 78
1s DIGIT SW14
B CD

E F01 2

9 0

9 01

SW1 1 2 3 4 5 6 7 8 9 10 OFF ON
123 SWA

BRANCH No. 1

4 CN43

8CN82

SYMBOL

NAME

I.B

INDOOR CONTROLLER BOARD

CN24 CONNECTOR EXTERNAL HEATER

CN32

REMOTE SWITCH

CN51

CENTRALLY CONTROL

CN52

REMOTE INDICATION

CN105

IT TERMINAL

BZ1 BUZZER

F1 FUSE (T3.15AL250V)

LED1 POWER SUPPLY (I.B)

LED2 POWER SUPPLY (MA-REMOTE CONTROLLER)

SW2 SWITCH CAPACITY CODE

SW3

MODE SELECTION

SW22

PAIR NO. SETTING

SWE

FAN·DRAIN PUMP (TEST MODE)

FAN MOTOR

MV1

VANE MOTOR (UPPER)

MV2

VANE MOTOR (LOWER)

TB2

TERMINAL POWER SUPPLY

TB5

BLOCK

TRANSMISSION

TB15

MA-REMOTE CONTROLLER

SYMBOL TH21
TH22
TH23
A.B SW1 SW11 SW12 SW14
S.B SWE1 SWE2
W.B REC1
L.B LED1 LED2
D.P FS DP

NAME

THERMISTOR ROOM TEMP. DETECTION

(32°F/15k, 77°F/5.4k)

PIPE TEMP. DETECTION / INLET

WATER (32°F/15k, 77°F/5.4k) PIPE TEMP. DETECTION / OUTLET

WATER (32°F/15k, 77°F/5.4k)

ADDRESS BOARD

SWITCH

MODE SELECTION

ADDRESS SETTING 1s DIGIT

ADDRESS SETTING 10s DIGIT

BRANCH No.

SWITCH BOARD

EMERGENCY OPERATION(HEAT)

EMERGENCY OPERATION(COOL)

PCB FOR WIRELESS REMOTE CONTROLLER

RECEIVING UNIT

LED BOARD

LED(OPERATING INDICATOR:GREEN)

LED(STANDBY FOR HEATING : ORANGE)

DRAIN PUMP KIT (OPTION)

DRAIN FLOAT SWITCH

DRAIN PUMP

NOTES:

1.At servicing for outdoor unit,always follow the wiring diagram

of outdoor unit.

2.In case of using MA-Remote controller, please connect to TB15.

(Remote controller wire is non-polar.)

3.In case of using M-NET, please connect to TB5.

(Transmission line is non-polar.)

4.Symbol [S]of TB5 is the shield wire connection.

5.Symbols used in wiring diagram above are,

: terminal

block,

:connector.

6.The setting of the SW2 dip switches differs in the capacity.

For the detail, refer to the Fig.*1.

LED on indoor controller board for service

Symbol

Meaning

Function

LED1 Main power supply

Main power supply (Indoor unit:208/230V) Power on lamp is lit

LED2

Power supply for MA-Remote controller

Power supply for MA-Remote controller on lamp is lit

TCH122

7 REFRIGERANT SYSTEM DIAGRAM

PKFY-WL04NLMU-E.TH PKFY-WL12NLMU-E.TH

PKFY-WL06NLMU-E.TH PKFY-WL15NLMU-E.TH

PKFY-WL08NLMU-E.TH

Heat exchanger

Pipe temperature detection thermistor/ inlet TH22
Water inlet connection
Manual air purge valve
Pipe temperature detection thermistor/ outlet TH23
Water outlet connection

Unit: in (mm)

Model Item
Water inlet

PKFY-WL04/06/08/12/15NLMU-E 7/8 (22)

Water outlet

7/8 (22)

Room temperature detection thermistor TH21

8 MICROPROCESSOR CONTROL

INDOOR UNIT CONTROL 8-1. COOL OPERATION

RETURN

SELECT HOLD

ON OFF

Press ON/OFF button. Press [F1] button to display COOL. Press [F2] [F3] button to set the set temperature. NOTE: The settable temperature range varies with the model of outdoor units and remote controller. Press POWER ON/OFF button. Press the operation MODE button to display COOL. Press the TEMP. button to set the set temperature. NOTE: The set temperature changes 1°F when the or button is pressed one time. Cooling 67 to 87°F .

TCH122

Control Mode 1. Temperature
adjustment function
2. Fan

Control Details

Remarks

1-1. Determining temperature adjustment function (Function to prevent restarting for 3 minutes) · Room temperature Set temperature + 2°F ···Thermo- ON · Room temperature Set temperature ···Thermo-OFF
1-2. Anti-freeze control Condition to detect When the pipe temperature detection thermistor/liquid (TH22) detects 32°F or less in 16 minutes from thermo-ON, the anti-freeze control initiates, and the unit enters to the thermo-OFF.
Condition to release The timer which prevents reactivating is set for 3 minutes, and anti-freeze control is

· The ON/OFF commands by the indoor unit thermostatic control are not an ON/OFF commands to the compressor but an open/close commands to the linear expansion valve. (The compressor stops only when the thermostatic control for all the indoor units connected to the same outdoor unit turns OFF.)

Pipe temperature detection thermistor/liquid (TH22) reaches 50°F or above. The condition of thermo-OFF has been completed by the thermostat. The operation has changed to a mode other than COOLING.

By the remote controller setting (switch of 4 speeds+Auto)

Type 4 speeds + Auto type

Fan speed notch Auto

3. Drain pump

When [Auto] is set, fan speed is changed depending on the value of: T = Room temperature – Set temperature

High Med2 Med1 Low

1.8°F

3.15°F

5.4°F

3-1. Drain pump control · The drain pump will always run when the unit is in COOL or DRYING mode. (Regardless of the thermo ON/OFF) · Whenever the operation is changed over to the other modes (including Stop), the drain pump will stop pumping after approximately 3 minutes.
Float switch control · Float switch control judges whether the sensor is in the air or in the water by turning the

Float SW ON
OFF 15 s

15 s

15 s 1 min 30 s 1 min 30 s

4. Vane (up/down vane change)

In the water In the air

In the water

Error

Drain pump

postponement abnormal

(1) The initial vane setting for COOL mode will be the horizontal position. (2) Vane position:
Horizontal Downward A Downward B Downward CDownward DSwingAuto

· “1h” appears on the wired remote controller.

(3) Restriction of the downward vane setting If the vane position is set to Downward A/B/C/D in [Med1], [Med2], or [Low], the vane will return to the horizontal position after 1 hour has passed.

TCH122

8-2. DRYING OPERATION

RETURN

SELECT HOLD

ON OFF

Press ON/OFF button. Press [F1] button to display DRYING. Press [F2] [F3] button to set the set temperature. Press POWER ON/OFF button. Press the operation MODE button to display DRYING. Press the TEMP. button to set the set temperature. NOTE: The set temperature changes 1°F when the or button is pressed one time. Dry 67 to 87°F

Control Mode
1. Temperature adjustment function

Control Details
1-1. Determining temperature adjustment function (Function to prevent restarting for 3 minutes) Setting the Dry thermo by the thermostat signal and the room temperature (TH21). Dry thermo-ON Room temperature Set temperature + 2°F Dry thermo-OFF Room temperature Set temperature

3 minutes passed since

Dry thermo-

Room temperature

starting operation

ON time

Thermostat signal Room temperature (T1)

(min)

T1 83°F

Over 64°F

83°F > T1 79°F

79°F > T1 75°F

75°F > T1

OFF

Unconditional

Below 64°F

Dry thermo OFF

Dry thermoOFF time (min)
3 3 3 3 10

2. Fan

1-2. Anti-freeze control No control function

Indoor fan operation controlled depends on the compressor conditions.

Dry thermo ON OFF

Fan speed notch [Low] Excluding the following Room temp. < 64°F

Note: Fan speed change is not allowed during DRYING operation.

Stop [Low]

3. Drain pump
4. Vane (up/down vane change)

Operates as it would in COOL operation. Settings are the same in DRYING operation as they are in COOL operation.

Remarks

TCH122

8-3. FAN OPERATION

RETURN

SELECT HOLD

ON OFF

Press ON/OFF button. Press [F1] button to display FAN. Press POWER ON/OFF button. Press the operation MODE button to display FAN.

Control Mode
1. Temperature adjustment function

Set by remote controller. Type
4 speeds + Auto type

Control Details Fan speed notch
Auto

Remarks

2. Drain pump

When [Auto] is set, fan speed becomes [Low]. 2-1. Drain pump control

ON for 3 minutes after the operation mode is switched from COOL or DRYING to another operation mode (FAN).
control judges the sensor is in the water.

2-2. Float switch control · Float switch control judges whether the sensor is in the air or in the water by turning the

· Operates as it would in COOL operation.

In the air

3. Vane (up/down vane change)

Same as the control performed during the COOL operation, but with no restriction on the vane’s downward blow setting

TCH122

8-4. HEAT OPERATION

RETURN

SELECT HOLD

ON OFF

Press ON/OFF button. Press [F1] button to display HEAT. Press [F2] [F3] button to set the set temperature. NOTE: The settable temperature range varies with the model of outdoor units and remote controller. Press POWER ON/OFF button. Press the operation MODE button to display HEAT. Press the TEMP. button to set the set temperature. NOTE: The set temperature changes 1°F when the or button is pressed one time. Heating 63 to 83°F

Control Mode
1. Temperature adjustment function

Control Details
1-1. Determining temperature adjustment function (Function to prevent restarting for 3 minutes) · Room temperature Set temperature -2°F ···Thermo-ON · Room temperature Set temperature ···Thermo-OFF

Remarks

2. Fan

By the remote controller setting (switch of 4 speeds+Auto)

Type 4 speeds + Auto type

Fan speed notch Auto

When [Auto] is set, fan speed is changed depending on the value of: T = Set temperature – Room temperature

Give priority to under-mentioned controlled mode 2-1. Hot adjust mode 2-2. Residual heat exclusion mode 2-3. 2-4. Cool air prevention mode (Defrosting mode)

stment function)

TCH122

Continue to the next page.

Control Mode

Control Details

Remarks

2-1. Hot adjust mode The fan controller becomes the hot adjuster mode for the following conditions. When starting the HEAT operation

*1 “Heat Standby” will be displayed during the hot adjust mode.

When the temperature adjustment function changes from OFF to ON. When release the HEAT defrosting operation

*2 The step change of A to B will not be

Hot adjust mode*1

[Extra Low]3 [Low]3

Set fan speed by the remote controller

thermo-ON mode since the HEAT operation has started.

[OFF]*2

*3 The fan speed varies

according to the setting

A: Hot adjust mode starts. B: 5 minutes have passed since the condition A or the indoor liquid pipe temperature reached 86°F or more. C: 5 minutes have passed since the condition A or the indoor liquid pipe temperature reached 95°F or more.

of DIP SW1-7 and 1-8 as shown in the table below.

D: 2minutes have passed since the condition C. (Terminating the hot adjust mode)

ON DIP SW
1-7 OFF

DIP SW 1-8

OFF

B to C [Extra Low] C to D [Low]

B to C [Low] C to D [Low]

B to C [Extra Low] C to D [Low]

Note: Initial setting

2-2. Residual heat exclusion mode When the condition changes the auxiliary heater ON to OFF (temperature adjustment function, or operation stop, etc.), the indoor fan operates in [Low] mode for 1 minute.

· This control is same for the model without auxiliary heater.

3. Drain pump

2-3. Thermo-OFF mode When the temperature adjustment function changes to OFF, the indoor fan operates in [Extra low].
2-4. Heat defrosting mode The indoor fan stops.
3-1. Drain pump control

ON for 3 minutes after the operation mode is switched from COOL or DRYING to another operation mode (FAN).
control judges the sensor is in the water.

3-2. Float switch control

· Operates as it would in

· Float switch control judges whether the sensor is in the air or in the water by turning the COOL operation.

4. Vane control (Up/down vane change)

(1) Initial setting: OFF HEAT···[last setting] When the last setting is [Swing] ··· [Downward D] When changing the mode from exception of HEAT to HEAT operation ···[Downward D] (2) Vane position: Horizontal Downward A Downward B Downward CDownward DSwingAuto

(3) Restriction of vane position

(The control by the remote controller is temporally invalidated and control by the unit.) · Thermo-OFF · Hot adjust [Extra low] mode · Heat defrost mode

TCH122

8-5. AUTO OPERATION [AUTOMATIC COOL/HEAT CHANGE OVER OPERATION]

RETURN

SELECT HOLD

ON OFF

Press ON/OFF button. Press [F1] button to display AUTO. Press [F2] [F3] button to set the set temperature. NOTE: The settable temperature range varies with the model of outdoor units and remote controller. Press POWER ON/OFF button. Press the operation MODE button to display AUTO. Press the TEMP. button to set the set temperature. NOTE: The set temperature changes 1°F when the or button is pressed one time. Automatic 67 to 83°F

Control Mode 1. Initial value of operation mode 2. Mode change
3. COOL mode 4. HEAT mode

Control Details
HEAT mode for room temperature < Set temperature COOL mode for room temperature Set temperature
(1) HEAT mode COOL mode Room temperature Set temperature + 3°F or 3 minutes have passed.
(2) COOL mode HEAT mode Room temperature Set temperature – 3°F or 3 minutes have passed.
Operates as it would in COOL operation.
Operates as it would in HEAT operation.

Remarks

8-6. WHEN UNIT IS STOPPED CONTROL MODE

Control Mode

Control Details

1. Drain pump

1-1. Drain pump control

Remarks

ON for 3 minutes after the operation mode is switched from COOL or DRYING to another operation mode (FAN).

control judges the sensor is in the water.
1-2. Float switch control · Float switch control judges whether the sensor is in the air or in the water by

· Operates as it would in COOL operation.

In the air

TCH122

9 TROUBLESHOOTING

9-1. HOW TO CHECK THE PARTS

PKFY-WL04NLMU-E.TH PKFY-WL12NLMU-E.TH

PKFY-WL06NLMU-E.TH PKFY-WL15NLMU-E.TH

PKFY-WL08NLMU-E.TH

Parts name

Checkpoints

Room temperature detection thermistor (TH21) Pipe temperature detection thermistor/liquid (TH22) Pipe temperature detection thermistor/gas (TH23)
Vane motor (MV1)

7 Sky Blue
9 Sky Blue 10 Red
Connector(CNV) pin No.

M
Sky Sky Blue Blue
68

Vane motor (Lower (MV2))

2 Sky Blue

4 Sky Blue 5 Red
Connector(CNV) pin No.

Sky Sky Blue Blue
13

Fan motor (MF)

Flow control valve

(FCV)
M FCV (Optional parts)

CN8A Yellow 1

Orange 2

Red

Green 4

Blue 5

Purple 6

White 7

Gray 8

Drain pump (DP)

1 RD 2 VT 3 BK
(Optional parts)

Disconnect the connector then measure the resistance with a multimeter. (At the ambient temperature 50 to 86°F)

Normal 4.3 to 9.6 k

Refer to “9-1-1. Thermistor”.

Measure the resistance between the terminals with a multimeter. (At the ambient temperature 77°F)

Normal

10 –

Red-Sky Blue Red-Sky Blue Red-Sky Blue Red-Sky Blue

300 ±7%

Measure the resistance between the terminals with a multimeter. (At the ambient temperature 77°F)

Normal

–

Red-Sky Blue Red-Sky Blue Red-Sky Blue Red-Sky Blue

300 ±26.3

Refer to “9-1-3. DC Fan motor (fan motor/indoor controller board)

Disconnect the connector then measure the resistance between terminals with a multimeter. Refer to the next page for details.

1-5 Yellow-Blue

Normal

2-5

3-5

Orange-Blue Red-Blue

55 ±5.6 (at 77°F

4-5 Green-Blue

Abnormal Open or short

Check if the drain float switch works properly. Check if the drain pump works and drains water properly in cooling operation. If no water drains, confirm that the check code 2502 will not be displayed 10 minutes after the operation starts. Note: The drain pump for this model is driven by the internal DC motor, so it is not possible to
measure the resistance between the terminals. Normal RedBlack: Input 13 VDC The pump motor starts to rotate.

Drain float switch (FS)

Moving part

(Optional parts)

Measure the resistance between the terminals with a multimeter.

State of moving part Normal

Abnormal

Drain float switch connector terminal

Short

Other than short

(+) (-)

DOWN

Open

Other than open

(+) (-)

Short

Other than short

(+) (-)

Moving Part

TCH122

Parts name
Pressure sensor (Optional parts)

Checkpoints

Pressure sensor (inner water) PS1 Pressure sensor (outlet water) PS2 1. Check that the pressure sensor is connected. 2. Check the pressure sensor wiring for breakage.
Pressure 0-1.0 MPa [145 psi] Vout 0.5-4.5 V 0.392 V/ 0.098 MPa [14 psi] Pressure [MPa] = 0.25 × Vout [V] – 0.125 Pressure [psi] = (0.25 × Vout [V] – 0.125) × 145

PS1
GND(RED) Vout(Brown) Vcc(DC5V)(Orange)

9-1-1. Thermistor

Thermistor for lower temperature

thermistor (TH21) (Room temperature detection)

thermistor (TH22)

(Pipe temperature detection/ inlet)

thermistor (TH23)

(Pipe temperature detection/ outlet)

6 5 4 3 2 1 3 2 1

PS2

Connector CNSA (White)

GND(Blue) Vout(White) Vcc(DC5V)(Yellow)

Connector CNSB (Black)

< Thermistor for lower temperature >

Resistance (k)

Thermistor R0=15 k” ± 3%

Fixed number of B=3480 ± 2%

Rt=15exp { 3480(

1 )}

273+(t-32)/1.8 273

30°F 50°F 70°F 80°F 90°F 100°F

15.8k 9.6k 6.0k 4.8k 3.9k 3.2k

9-1-2. Flow control valve (FCV)

0 -20 0

20 40 60 80 100 120 Temperature (°F)

1 Summary of flow control valve (FCV) operation · The FCV is operated by a stepping motor, which operates by receiving a pulse signal from the indoor control board. · The FCV position changes in response to the pulse signal.

Indoor control board and FCV connection
Flow control valve

Control board

Limit signal (Opening “0” signal)
Ø1 M
Ø3 Ø2 Ø4

Connector 1
2
3 4 5 6 7
8

Gray

White 7

Purple 6

Blue

Ø4 Green 4

Ø3 Red

Ø2 Orange 2

Ø1 Yellow 1

GND

Microprocessor
12V
Drive circuit Ø4 Ø3 Ø2 Ø1

Connector (CN8A)

Pulse signal output and valve operation

Output (phase) number
Ø1 Ø2 Ø3 Ø4

1 OFF ON ON OFF

Output status

OFF

4 OFF OFF ON ON

The output pulse changes in the following order: When the valve closes 1 -> 2 -> 3 -> 4 -> 1 When the valve opens 4 -> 3 -> 2 -> 1 -> 4

TCH122

2 FCV operation
(a) (f)

(a) Close (b) Open (c) Fully open valve (85 pulses) (d) Fully close valve (770 pulses) (e) No. of pulses (f) Valve opening degree

(b)

(c)

(d)

(e)

9-1-3. DC Fan motor (fan motor/indoor controller board)
Check method of indoor fan motor (fan motor/indoor controller board) Notes · High voltage is applied to the connector (CNMF) for the fan motor. Pay attention to the service. · Do not pull out the connector (CNMF) for the motor with the power supply on. (It causes trouble of the indoor controller board and fan motor.) Self check Conditions : The indoor fan cannot rotate.
Indoor controller board fuse check

Is the fuse normal?

Yes

Wiring contact check Contact of fan motor connector (CNMF)

Replace the defective fan motor. Replace the indoor controller board.

Is there contact failure?

Yes

Correct wiring.

No
Power supply check (Remove the connector (CNMF)) Measure the voltage in the indoor controller circuit board. TEST POINT : VDC (between 1 (+) and 4 (-) of the fan connector): VDC 295-325 VDC TEST POINT : VCC (between 5 (+) and 4 (-) of the fan connector): VCC 15 VDC

Is the voltage normal?

Yes

Replace the defective fan motor.

No Replace indoor controller board.
Check the operation. Fail

Check the operation of fan.

OK Complete.

Fail

Replace indoor controller board. OK
Complete.

Replace the defective fan motor.

TCH122

9-2. FUNCTION OF DIP SWITCH

PKFY-WL04NLMU-E.TH PKFY-WL12NLMU-E.TH

PKFY-WL06NLMU-E.TH PKFY-WL15NLMU-E.TH

PKFY-WL08NLMU-E.TH

Switch SW1 Mode Selection

Pole
1 2 3 4 5 6 7 8

Function Thermistor position Filter clogging Filter sign indication Air intake*1 Remote indication switching Humidifier control
Airflow set in case of heat thermo-OFF

Operation by switch

OFF

The black square ( ) indicates a switch position.

Effective timing

Remarks

Built-in remote controller

Indoor unit

Address board

Provided 2,500 hr
Not effective

Not provided 100 hr
Not effective

ON OFF 1 2 3 4 5 6 7 8 9 10

Thermo-ON signal indication

Fan output indication

1 The model is not capable of fresh air intake. Under 2 Refer to

below.

Fan operation at Heating Thermo-ON operation at suspension

mode

heating mode

Low*2

Extra low*2

Setting airflow*1

Depends on SW1-7

9 Auto restart function Effective

Not effective

10 Power ON/OFF

Effective

Not effective

Models

SW2

Models

SW2

Capacity code

setting

WL04 OFF ON 654321

OFF WL12 ON
654321

OFF WL06
ON 654321

OFF WL15 ON
654321

WL08 OFF ON 654321

Before power supply
ON

Indoor controller board
Set for each capacity.

SW3 Function Selection

1 Heat pump/Cool only

—

8 Heating 4 degree up

—

SW1-7 OFF ON OFF ON

SW1-8 OFF OFF ON ON

Extra low Low Setting airflow stop

Cooling only — — — — — —
Not effective — —

Heat pump — — — — — —
Effective — —

Under suspension

Indoor controller board

ON OFF 1234567 8 90

Continue to the next page

TCH122

Switch

Pole

1~3

SWA (Fan speed)

The black square ( ) indicates a switch position.

Function

Fan speed can be changed depending on SWA

setting.

PKFY-WL**NLMU-E

Setting 2

Effective timing Under
operation or
suspension

Remarks
Address board It follows as the left table.

SW11 1s digit address setting SW12 10s digit address setting SW14 Connection
No. setting
SW22 Function selection

Jumper

Rotary switch
BCD

Rotary switch
78

78 BCD
78

23 345
23

6789A

345

SW12 SW11

90 1

45 6

SW14
EF 0 12

Address setting should be done when M-NET remote controller is being used.

This is the switch to be used when the indoor unit is operated with R2 series outdoor unit as a set.

Before power supply
ON

Address board

SW12 SW11

90 1

45 6

Address board

SW14 EF 0 12

6789A

Function

3 Pair No. of wireless remote controller

4 Pair No. of wireless remote controller

OFF

Depends on SW22-3, 22-4

· To operate each indoor unit by each remote controller when installed 2 indoor units or more are near, Pair No. setting is necessary. Pair No. setting is available with the 4 patterns.

· Pair No. setting is not set necessarily when operating it by one remote controller. Setting for indoor unit.

Wireless remote controller pair number:

Setting operation (Fig. 1 A)

1. Press the

button 1 to stop the air conditioner.

2. Press the

button 2.

3. Check that function No.”1″ is displayed, and then press the

button 3. The Screen display setting screen will be displayed. (Fig. 2.)

Pair No. changing operation (Fig. 2 B) 1. Press the button 4.

2. Each time the button 4 is pressed, the pair No.03 changes.

3. Press the

button 3 to check the setting.

4. Press the

button 2.

Indoor unit SW22

SW22-3 SW22-4

OFF

Pair No. of wireless remote controller
0
1 2 39

Initial setting

1 2 4 3 Under operation or suspension A Fig. 1 B

SWE Test run for Drain
pump

Connector

Drain pump and fan are activated simultaneously after the connector SWE is set to ON and turn on the power.

SWE

OFF ON

The connector SWE is set to OFF after test run.

TCH122

Under operation

Fig. 2
SWE
OFF ON

9-3. TEST POINT DIAGRAM 9-3-1. Indoor controller board (I.B)

PKFY-WL04NLMU-E.TH PKFY-WL12NLMU-E.TH

PKFY-WL06NLMU-E.TH PKFY-WL15NLMU-E.TH

PKFY-WL08NLMU-E.TH

CN2M M-NET transmission connecting wire 24 – 30 VDC (non-polar)
CN8A Linear expansion valve(LEV) 12 VDC pulse output (OPTION)
CN52 Remote indicator 1-2: Status lamp 12 V DC (1 : +)
Fan motor output (SW1-5 OFF) Thermostat ON (SW1-5 ON) 1-3: Cooling/Dry status lamp 12 VDC (1 : +) 1-4: Heating status lamp 12 VDC (1 : +)
CN51 Centrally control 1-2 : Control signal
12 VDC pulse input (1 : +) 3-4 : Operation indicator
12 VDC (3 : +) 3-5 : Malfunction indicator
12 VDC (3 : +) LED2 Power supply for MA-Remote controller

CN4F

Drain float switch (FS) :

(OPTION)

CN32

CN2A

Remote switch

MA-Remote controller

connecting wire

1-2 : 8.7 – 13 VDC (non-polar)

CNRU Connect to SWITCH BOARD (S.B),LED BOARD (L.B) and PCB FOR WIRELESS REMOTE CONTRILLER (W.B)

CNP Drain pump (DP) : (OPTION) 1-3 : 12 VDC

CND Power supply for indoor controller board 3-5 : 220 – 240 VAC
F1 Fuse T3.15AL250V

CN105 IT Terminal

CNV Vane motor (MV) 12 VDC pulse output

LED1 Main power supply (Indoor unit : 208 – 230V)

CN44 Pipe temperature thermistor 1-2 : Liquid (TH22) 3-4 : Gas (TH23) 5-6 : Gas (TH24)
CNAD Connect to ADDRESS BOARD (A.B)
SWE Test run (Drain pump and indoor fan motor)
SW3 Function setting
SW2 Capacity setting
SW22 Pair No. setting for wireless remote controller
CN20 Room temperature thermistor (TH21)
CNSA Pressure sensor (inner water) (OPTION) CNSB Pressure sensor (outlet water) (OPTION)
CNMF Connect to the Fan motor (MF) 1-4 : 295 – 325 VDC 5-4 : 15 VDC 6-4 : 0 VDC (FAN stop) 1 – 6.5 VDC (FAN operation)

Note: The voltage range of 12 VDC in this page is between 11.5 to 13.7 VDC.

TCH122

9-3-2. PCB FOR WIRELESS REMOTE CONTROLLER (W.B),

SWITCH BOARD (S.B) and LED BOARD (L.B)

PKFY-WL04NLMU-E.TH

PKFY-WL06NLMU-E.TH

PKFY-WL08NLMU-E.TH

PKFY-WL12NLMU-E.TH

PKFY-WL15NLMU-E.TH

PCB FOR WIRELESS REMOTE CONTROLLER (W.B)
REC1 Receiving unit

SWITCH BOARD (S.B)

SWE1

SWE2

Emergency operation (HEAT)

Emergency operation (COOL)

CN301 Connect to INDOOR CONTROLLER BOARD ( I.B ) CNRU

CN303 Connect to INDOOR CONTROLLER BOARD ( I.B ) CNRU

LED BOARD (L.B)
CN302 Connect to INDOOR CONTROLLER BOARD ( I.B ) CNRU
LED1 Operating indicator : GREEN
LED2 Standby for Hearting : ORANGE

9-3-3. Address board (A.B) PKFY-WL04NLMU-E.TH PKFY-WL12NLMU-E.TH

PKFY-WL06NLMU-E.TH PKFY-WL15NLMU-E.TH

PKFY-WL08NLMU-E.TH

SW12 Address setting 10s digit SW11 Address setting 1s digit
SW14 BRANCH No.
TCH122

SW1 Mode selection
SWA Region selection
CN43 Connect to INDOOR CONTROLLER BOARD ( I.B ) CNAD CN82 Connect to INDOOR CONTROLLER BOARD ( I.B ) CNAD
26

10 DISASSEMBLY PROCEDURE

PKFY-WL04NLMU-E.TH PKFY-WL12NLMU-E.TH

PKFY-WL06NLMU-E.TH PKFY-WL15NLMU-E.TH

PKFY-WL08NLMU-E.TH

NOTE: Turn OFF the power supply before assembly.
OPERATION PROCEDURE
1. REMOVING THE PANEL
(1) Insert the screwdriver to the hole at VANE LOWER shaft and slide the VANE LOWER shaft (2 places each). Push VANE UPPER shaft with the screwdriver.
(2) Pull the VANE LOWER and VANE UPPER from unit. (3) Remove 2 screw caps of the front panel. Remove 2
screws. (See Photo 1) (4) Hold the lower part of both ends of the front panel and pull
it slightly toward you, and then remove the front panel by pushing it upward. (5) Remove the screw of the corner box. (See Photo 1) Remove the corner box.
Unlock the stopper and remove the horizontal vanes using following tool like a screwdriver.

Be careful when removing heavy parts.
PHOTOS/FIGURES

Photo 1 VANE UPPER shaft

VANE UPPER

VANE LOWER shaft

Front panel

VANE LOWER

Screw of the Screws and screw caps corner box

Unlock
Unlock

Photo 2 Screw of electrical Hook
box cover (side)
Screw of electrical box cover (side)

Water cover

2. REMOVING THE ELECTRICAL BOX

(1) Remove the panel and the corner box. (Refer procedure to 1) (2) Remove the front and side electrical box covers (each 2
screw). (3) Remove the transmission wiring of TB5, the power supply
wiring of TB2 and the wiring of MA-remote controller (TB15). (4) Disconnect the connectors on the indoor controller board. (5) Disconnect the connector for ground wire. (6) Remove the screw on lower side of the electrical box.
(See Photo 3) (7) Push up the upper fixture catch to remove the box, then
remove it from the box fixture.

Photo 3

Screw of electrical box cover (Front)

Connect for ground

Fixture

TCH122

Screw of electrical box

Electrical box

OPERATION PROCEDURE
3. REMOVING THE ADDRESS BOARD, THE INDOOR CONTROLLER BOARD, THE WIRELESS CONTROLLER BOARD, LED BOARD
(1) Remove the panel and the corner box. (Refer to procedure 1)
(2) Remove the front and side electrical box covers (each 2 screw).
(3) Disconnect the connectors of address board. (4) Disconnect the connectors on the indoor controller board.
(See Photo 4) (5) Remove the switch board holder and open the cover. (6) Pull out the indoor controller board toward you then
remove the indoor controller board and switch board. (See Photo 4) (7) Remove the holder of wireless remote controller board and LED board. (8) Disconnect the connector of wireless remote controller board and LED board. (9) Remove the wireless remote controller board and LED board from the holder.

PHOTOS/FIGURES

Photo 4
Holder of wireless remote controller board and LED board

Switch board holder (Holder of switch board)

Address board
Indoor controller board

Photo 5 (see the bottom)
Nozzle assembly

Vane motor unit

4. REMOVING THE NOZZLE ASSEMBLY (with VANE and VANE MOTOR) AND DRAIN HOSE
(1) Remove the panel and corner box. (Refer to procedure 1) (2) Remove the electrical box covers. (Refer to procedure 2) (3) Disconnect the vane motor connector (CNV) on the indoor
controller board. (4) Push fixture and pull out the drain hose from the nozzle
assembly, and remove nozzle assembly. (See Photo 6)
5. REMOVING THE VANE MOTOR
(1) Remove the nozzle assembly. (Refer to procedure 4) (2) Remove 2 screws of the vane motor unit cover, and pull
out the vane motor unit. (3) Remove screw of the vane motor (LOWER). (4) Remove the vane motor (LOWER) from the vane motor
unit cover. (5) Disconnect the connector (white) from the vane motor.
(LOWER) (6) Remove 2 screw of the vane motor (UPPER). (7) Remove the vane motor (UPPER) from the vane motor
unit cover. (8) Disconnect the connector (blue) from the vane motor
(UPPER).

Drain hose

Photo 6

Screws of the vane motor (LOWER)

Fixture
Drain hose

Screws of the vane motor unit cover
Photo 7

TCH122

Screws of the vane motor (UPPER)
28

OPERATION PROCEDURE
6. REMOVING THE INDOOR FAN MOTOR AND THE LINE FLOW FAN
(1) Remove the panel and the corner box. (Refer to procedure 1) (2) Remove the electrical box (Refer to procedure 2) and the
nozzle assembly (Refer to procedure 4). (3) Remove the water cover. (See Photo 2) (4) Loosen the screw fixing the line flow fan. (See Photo 9) (5) Remove 3 screws fixing the motor bed. (See Photo 8) (6) Remove the motor bed together with fan motor and motor
band. (7) Release the 2 hooks of the motor band. Remove the motor
band. Pull out the indoor fan motor. (8) Remove 2 screws fixing the left side of the heat exchanger.
(See Photo 10) (9) Lift the heat exchanger, and pull out the line flow fan to the
lower-left. Note: When attaching the line flow fan, screw the line flow fan
so 4mm gap is provided between the right end of the line flow fan and the right wall of the air passage of the box. (See Photo 9)
Photo 10

PHOTOS/FIGURES

Photo 8
Lead wire of pipe thermistor

Motor band

Screws of the motor bed
Motor bed

Photo 9

Screw of the line flow fan

Screws of the left side of the heat exchanger

4 mm

7. REMOVING PIPE THERMISTOR AND AIR PURGE VALVE
(1) Remove the panel and the corner box. (Refer to procedure 1)
(2) Remove the electrical box covers. (Refer to procedure 2) (3) Remove the water cover. (See Photo 2) (4) Remove the inlet pipe thermistor and outlet pipe thermistor. (5) Disconnect the connector (CN44) on the indoor controller
board. (TH22 and TH23/CN44) (6) Remove the air purge valve

Photo 11
Outlet pipe thermistor (TH23)

Air purge valve Connect for ground

TCH122

Inlet pipe thermistor (TH22)
29

OPERATION PROCEDURE
8. REMOVING THE HEAT EXCHANGER
(1) Remove the panel and the corner box (Refer to procedure 1). (2) Remove the electrical box (Refer to procedure 3) and the
nozzle assembly (Refer to procedure 4). (3) Remove the water cover. (4) Remove the pipe thermistors. (Refer to procedure 7). (5) Disconnect the connector (CN60) on the indoor controller
board. (6) Remove the motor bed together with fan motor and motor
band (Refer to procedure 6). (7) Remove 2 screws fixing the left side of the heat exchanger.
(See Photo 10) (8) Remove the heat exchanger.

PHOTOS/FIGURES
Photo 12
Heat exchanger

Photo 13
Heat exchanger

Water cover Connect for ground

9. REMOVING THE ROOM TEMPERATURE THERMISTOR
(1) Remove the panel and corner box. (Refer to procedure 1) (2) Remove the electrical box covers. (Refer to procedure 2) (3) Remove the room temperature thermistor. (4) Disconnect the connector (CN20) on the indoor controller
board.

Photo 14

Room temp. thermistor (TH21)

Indoor controller board

TCH122

11 REMOTE CONTROLLER

11-1. REMOTE CONTROLLER FUNCTIONS

Controller interface

RETURN

SELECT HOLD

ON OFF

Function buttons

The functions of the function buttons change depending on the screen. Refer to the button function guide that appears at the bottom of the LCD for the functions they serve on a given screen. When the system is centrally controlled, the button function guide that corresponds to the locked button will not appear.

Main display
Fri

Cool
Mode

Room 83
Set temp.
83
Temp.

Auto
Fan

Main menu
Main Main menu
Energy saving

7 890
Menu screen
Operation Vane·Louver·Vent. (Lossnay) High power Comfort
Main menu: RETURN Cursor

7 890
Function guide

7 890

[ON/OFF] button Press to turn ON/OFF the indoor unit.
[SELECT/HOLD] button Press to save the setting. When the Main menu is displayed, pressing this button will enable/disable the HOLD function.
[RETURN] button Press to return to the previous screen.
[MENU] button Press to bring up the Main menu.
Backlit LCD Operation settings will appear. When the backlight is off, pressing any button turns the backlight on and it will stay lit for a certain period of time depending on the screen.
When the backlight is off, pressing any button turns the backlight on and does not perform its function. (except for the [ON/OFF] button)

ON/OFF lamp This lamp lights up in green while the unit is in operation. It blinks while the remote controller is starting up or when there is an error.
Function button [F1] Main display: Press to change the operation mode. Menu screen: The button function varies with the screen.
Function button [F2] Main display: Press to decrease temperature. Main menu: Press to move the cursor left. Menu screen: The button function varies with the screen.
Function button [F3] Main display: Press to increase temperature. Main menu: Press to move the cursor right. Menu screen: The button function varies with the screen.
Function button [F4] Main display: Press to change the fan speed. Menu screen: The button function varies with the screen.

TCH122

Display

The main display can be displayed in two different modes: “Full” and “Basic”. The initial setting is “Full”. To switch to the “Basic” mode,

change the setting on the Main display setting. (Refer to operation manual included with remote controller.)

All icons are displayed for explanation.

2345 6 7

8 90

Room 83

Cool Set temp.

Mode

Temp.

Fri 3 9 @ )
Auto
4
Fan

Fri 3

Cool Set temp. Auto

1 83

Mode

Temp.

Fan

5 Operation mode

Preset temperature

5
Appears when the Weekly timer is enabled.

Clock Fan speed Button function guide Functions of the corresponding buttons appear here.
Appears when the ON/OFF operation is centrally controlled.

Appears while the units are operated in the energy saving mode. (Will not appear on some models of indoor units)
Appears while the outdoor units are operated in the silent mode.
Appears when the built-in thermistor on the remote controller is activated to monitor the room temperature (1).
appears when the thermistor on the indoor unit is activated to monitor the room temperature.

Appears when the operation mode is centrally controlled.

Indicates the vane setting.

Appears when the preset temperature is centrally controlled.

Indicates the louver setting.

Appears when the filter reset function is centrally controlled.

Indicates the ventilation setting.

Indicates when filter needs maintenance. Room temperature
Appears when the buttons are locked.
Appears when the On/Off timer or Auto-off timer function is enabled. appears when the timer is disabled by the centralized control system. appears when the HOLD function is enable.

Appears when the preset temperature range is restricted.
Appears when an energy saving operation is performed using a “3D i-See sensor” function.
Centrally controlled Appears for a certain period of time when a centrally- controlled item is operated.
Preliminary error display A check code appears during the preliminary error.

Most settings (except ON/OFF, mode, fan speed, temperature) can be made from the Main menu.

TCH122

Menu structure Main menu

Press the MENU button. Move the cursor to the desired item with the F1 and F2 buttons, and press the SELECT/HOLD button.
Operation
Vane · Louver · Vent. (Lossnay) High power Comfort Manual vane angle 3D i-See sensor
Timer menu
Timer ON/OFF timer Auto-OFF timer
Weekly timer OU silent mode

Energy saving

Restriction Temp. range Operation locked
Energy saving Auto return Schedule

Initial setting menu

Basic setting

Main/Sub

Clock

Daylight saving time

Administrator password

Display setting

Main display

Display details

Contrast · Brightness

Language selection
Operation setting Auto mode Setback mode

Continue to the next page.

Not all functions are available on all models of indoor units.

TCH122

Continue from the previous page.
Maintenance menu Error information Filter information Cleaning Auto descending panel Descending operation Descending adjustment
Service menu Test run menu Test run Drain pump test run
Maintenance information Model name input Serial No. input Dealer information input Initialize maintenance info.
Settings menu Function setting Lossnay
Check menu Error history Diagnosis Self check Remote controller check
Other menu Maintenance password Initialize remote controller Remote controller information
Not all functions are available on all models of indoor units.

TCH122

Main menu list

Main menu

Setting and display items

Operation Vane · Louver · Vent. (Lossnay)

Setting details
Use to set the vane angle. · Select a desired vane setting from 5 different settings. Use to turn ON/OFF the louver. · Select a desired setting from “ON” and “OFF.” Use to set the amount of ventilation. · Select a desired setting from “Off,” “Low,” and “High.”

High power

Use to reach the comfortable room temperature quickly. · Units can be operated in the High-power mode for up to 30 minutes.

Timer

Comfort Timer

Manual vane angle 3D i-see Sensor
ON/OFF timer *1

Use to fix each vane angle.
Use to set the following functions for 3D i-see Sensor. · Air distribution · Energy saving option · Seasonal airflow Use to set the operation ON/OFF times. · Time can be set in 5-minute increments.

Auto-Off timer Weekly timer 1, 2
OU silent mode *1

Use to set the Auto-Off time. · Time can be set to a value from 30 to 240 in 10-minute increments.
Use to set the weekly operation ON/OFF times. · Up to 8 operation patterns can be set for each day. (Not valid when the ON/OFF timer is enabled.)
Use to set the time periods in which priority is given to quiet operation of outdoor units over temperature control. Set the Start/Stop times for each day of the week. ·Select the desired silent level from “Normal,” “Middle,” and “Quiet.”

Energy saving

Restriction Temp. range *2 Use to restrict the preset temperature range. · Different temperature ranges can be set for different operation modes.

Operation lock Use to lock selected functions. · The locked functions cannot be operated.

Energy Auto return 2 saving
Schedule 1

Use to get the units to operate at the preset temperature after performing energy saving operation for a specified time period. · Time can be set to a value from 30 and 120 in 10-minute increments. (This function will not be valid when the preset temperature ranges are restricted.)
Set the start/stop times to operate the units in the energy saving mode for each day of the week, and set the energy saving rate. · Up to 4 energy saving operation patterns can be set for each day. · Time can be set in 5-minute increments. · Energy saving rate can be set to a value from 0% or 50 to 90% in 10% increments.

*1 Clock setting is required.

*2 33.8°F (1°C) increments.

TCH122

Main menu Initial setting
Maintenance
Service

Setting and display items

Setting details

Basic Main/Sub setting

When connecting 2 remote controllers, one of them needs to be designated as a sub controller.

Clock

Use to set the current time.

Daylight saving time

Set the daylight saving time.

Administrator password

The administrator password is required to make the settings for the following items. · Timer setting · Energy saving setting · Weekly timer setting · Restriction setting · Outdoor unit silent mode setting · Night set back

Display Main display setting

Use to switch between “Full” and “Basic” modes for the Main display. · The initial setting is “Full.”

Display details

Make the settings for the remote controller related items as necessary. Clock: The initial settings are “Yes” and “24h” format. Temperature: Set either Celsius (°C) or Fahrenheit (°F). Room temp. : Set Show or Hide. Auto mode: Set the Auto mode display or Only Auto display.

Contrast · Brightness
Language selection
Operation Auto mode setting

Use to adjust screen contrast and brightness.
Use to select the desired language.
Whether or not to use the Auto mode can be selected by using the button. This setting is valid only when indoor units with the Auto mode function are connected.

Setback mode

Whether or not to use the Setback mode can be selected by using the button. This setting is valid only when indoor units with the Setback mode function are connected.

Error information

Use to check error information when an error occurs. · Check code, error source, refrigerant address, unit model, manufacturing number,
contact information (dealer’s phone number) can be displayed. (The unit model, manufacturing number, and contact information need to be
registered in advance to be displayed.)

Filter information

Use to check the filter status. · The filter sign can be reset.

Cleaning Auto descending Use to lift and lower the auto descending panel (Optional parts). panel

Test run

Select “Test run” from the Service menu to bring up the Test run menu. · Test run · Drain pump test run

Input maintenance

Select “Input maintenance Info.” from the Service menu to bring up the Maintenance information screen. The following settings can be made from the Maintenance Information screen. · Model name input · Serial No. input · Dealer information input · Initialize maintenance info.

Settings Function setting Make the settings for the indoor unit functions via the remote controller as necessary.

LOSSNAY setting This setting is required only when the operation of CITY MULTI units is interlocked with LOSSNAY units.

Check Error history

Display the error history and execute “delete error history”.

Other

Diagnosis

Self check: Error history of each unit can be checked via the remote controller.

Remote controller check: When the remote controller does not work properly, use the remote controller checking function to troubleshoot the problem.

Maintenance password

Use to change the maintenance password.

Initialize remote Use to initialize the remote controller to the factory shipment status. controller

Remote controller Use to display the remote controller model name, software version, and serial

information

number.

TCH122

Controller interface

Set Temperature buttons
Mode button (Changes operation mode) Airflow button (Changes up/ down airflow direction) Timer ON button Timer OFF button
Weekly timer ON/OFF button*

Set Time button (Sets the time)

Display

Operation mode Cool Fan
Heat

Dry
Auto (single set point)
Auto (dual set point)

Temperature setting The units of temperature can be changed. For details, refer to the Installation Manual.
Vane setting Step 1 Step 2 Step 3 Step 4 Step 5 Swing Auto

Transmission area Remote controller display

OFF/ON button
Fan Speed button (Changes fan speed) i-see button Menu button SET/SEND button CANCEL button Up/Down buttons
Reset button Note: This button is enabled or disabled depending on the
model of the indoor unit.

Not available Appears when a non-supported function is selected.
Battery replacement indicator Appears when the remaining battery power is low.
Fan speed setting Auto

3D i-See sensor (Air distribution)

Default

Direct

Indirect When Direct or In-

direct is selected,

the vane setting is

set to Auto.

TCH122

11-2. ERROR INFORMATION
When an error occurs, the following screen will appear. Check the error status, stop the operation, and consult your dealer. 1. Check code, error unit, refrigerant address, model name, and serial number will appear. The model name and serial number will appear only if the information has been registered. Press the F1 or F2 button to go to the next page.
Contact information (dealer’s phone number) will appear if the information has been registered.
2. Press the F4 button or the [ON/OFF] button to reset the error that is occurring. Errors cannot be reset while the ON/OFF operation is prohibited.
Select “OK” with the F4 button.

Navigating through the screens · To go back to the Service menu ………. [MENU] button

TCH122

Error information

Error code A3

Error unit IU

Unit#1

Time Occurred 2/ 1 4:48

Model name

Serial No.

Reset error: Reset button

Page

Reset

F1 F2 F3

RETURN

SELECT HOLD

F4 blinks
ON OFF

Error information
Contact information Dealer
Tel

Reset error: Reset button

Page

Reset

Error information

Error code A3

Error unit IU

Unit#1

Time Occurred 2/ 1 4:48

Model name

Serial No.

Reset error: Reset button

Page

Reset

F1 F2 F3

RETURN

SELECT HOLD

F4 blinks
ON OFF

Error reset Reset current error?
Cancel OK
F1 F2 F3 F4
Error reset Error reset Main menu: MENU

· Checking the error information
While no errors are occurring, page 2/2 of the error information can be viewed by selecting “Error information” from the Maintenance menu. Errors cannot be reset from this screen.

Maintenance menu Error information Filter information Cleaning
Main menu: RETURN Cursor

F1 F2 F3 F4

RETURN

SELECT HOLD

ON OFF

TCH122

11-3. SERVICE MENU
Maintenance password is required 1. Select “Service” from the Main menu, and press the [SELECT/HOLD] button.
*At the main display, the menu button and select “Service” to make the maintenance setting.

Main Main menu Service

2. When the Service menu is selected, a window will appear asking for the password. To enter the current maintenance password (4 numerical digits), move the cursor to the digit you want to change with the F1 or F2 button.
Set each number (0 through 9) with the F3 or F4 button.
Then, press the [SELECT/HOLD] button.
Note: The initial maintenance password is “9999”. Change the default password as necessary to prevent unauthorized access. Have the password available for those who need it.
: If you forget your maintenance password, you can initialize the password to the default password “9999” by pressing and holding the F1 button for 10 seconds on the maintenance password setting screen.
3. If the password matches, the Service menu will appear. The type of menu that appears depends on the connected indoor units’ type.
Note: Air conditioning units may need to be stopped to make only at “Settings”. There may be some settings that cannot be made when the system is centrally controlled.
A screen will appear that indicates the setting has been saved.
Navigating through the screens · To go back to the Service menu ………….. [MENU] button · To return to the previous screen…………… [RETURN] button

Service menu Enter maintenance password

Select: SELECT Cursor

F1 F2 F3

RETURN

SELECT HOLD

F4
ON OFF

Service menu Test run Input maintenance info. Settings Check Others Main menu: RETURN
Cursor
Service menu
Not available. Please stop the unit.
Service menu: RETURN

TCH122

11-4. TEST RUN
11-4-1. PAR-41MAA 1. Select “Service” from the Main menu, and press the [SELECT/HOLD] button.
Select “Test run” with the F1 or F2 button, and press the [SELECT/HOLD] button.
2. Select “Test run” with the F1 or F2 button, and press the [SELECT/HOLD] button.
Test run operation Press the F1 button to go through the operation modes in the order of “Cool and Heat”.
Cool mode: Check the cold air blows out. Heat mode: Check the heat blows out. Check the operation of the outdoor unit’s fan. Press the [SELECT/HOLD] button and open the Vane setting screen.
Auto vane check Check the auto vane with the F1 F2 buttons. Press the [RETURN] button to return to “Test run operation”. Press the [ON/OFF] button. When the test run is completed, the “Test run menu” screen will appear. The test run will automatically stop after 2 hours. *The function is available only for the model with vanes.

Service menu
Test run Input maintenance info. Settings Check Others
Main menu: RETURN Cursor

F1 F2 F3

RETURN

SELECT HOLD

F4
ON OFF

Test run menu
Test run Drain pump test run

Service menu: MENU Cursor

F1 F2 F3

RETURN

SELECT HOLD

F4
ON OFF

Test run

Remain

Cool Mode

Pipe 83°F
Switch disp. SELECT

Auto Fan

F1 F2 F3

RETURN

SELECT HOLD

F4
ON OFF

Test run

Remain

Vane

F1 F2 F3

RETURN

SELECT HOLD

F4
ON OFF

TCH122

11-4-2. PAR-SL101A-E

1. Press the

button 1 to stop the air conditioner.

· If the weekly timer is enabled ( is on), press the
button 3 to disable it ( is off).

2. Press the

button 2 for 5 seconds.

· comes on and the unit enters the service mode.

3. Press the

button 2.

· B comes on and the unit enters the test run mode.

4. Press the following buttons to start the test run.

: Switch the operation mode between cooling and heating

and start the test run.

: Switch the fan speed and start the test run.

: Switch the airflow direction and start the test run.

: Switch the louver and start the test run.

: Start the test run.

5. Stop the test run.

· Press the

button 1 to stop the test run.

· After 2 hours, the stop signal is transmitted.

TCH122

11-5. FUNCTION SETTING
11-5-1. PAR-41MAA 1. Select Service from the Main menu, and press the [SELECT/HOLD] button.
Select Setting from the Service menu, and press the [SELECT/HOLD] button.
Select Function setting, and press the [SELECT/HOLD] button.
2. The Function setting screen will appear. Press the F1 or F2 button to move the cursor to one of the following: M-NET address, function setting number, or setting value. Then, press the F3 or F4 button to change the settings to the desired settings.
Once the settings have been completed, press the [SELECT/HOLD] button. A screen will appear indicating that the settings information is being sent. To check the current settings of a given unit, enter the setting for its M-NET address and function setting number, select Conf for the Function, and press the [SELECT/HOLD] button. A screen will appear indicating that the settings are being searched for. When the search is done, the current settings will appear.
When the settings information has been sent, a screen will appear indicating its completion. To make additional settings, press the [RETURN] button to return to the screen shown in the above step. Set the function numbers for other indoor units by following the same steps.

Settings menu Function setting Lossnay
Service menu: MENU Cursor

F1 F2 F3 F4

RETURN

SELECT HOLD

ON OFF

Function setting

M-NET address 3

Function No.

Data

Function

Set /Conf

Select: SELECT

Cursor

Address

Function setting

M-NET address 3

Function No.

Data

Sending data

Function setting

M-NET address 3

Function No.

Data

Setting completed

Return: RETURN

Note: · Refer to the indoor unit Installation Manual for information about the factory settings
of indoor units, function setting numbers, and setting values. · Be sure to write down the settings for all functions if any of the initial settings has been
changed after the completion of installation work.

TCH122

11-5-2. PAR-SL101A-E Fig. 1

1. Going to the function select mode

Press the

button between of 5 seconds.

(Start this operation from the status of remote controller display turned off.)

[CHECK] is lit and “00” blinks. (Fig. 1)

Press the button to set the “50”.

Direct the wireless remote controller toward the receiver of the indoor unit and

press the

button.

2. Setting the unit number

Press the button to set unit number . (Fig. 2)

Direct the wireless remote controller toward the receiver of the indoor unit and

press the

button.

Fig. 2 Fig. 3 Fig. 4

3. Select a mode

Press the button to set Mode number . (Fig. 3)

Direct the wireless remote controller toward the receiver of the indoor unit and

press the

button.

Current setting number:

1=1 beep (1 second)

2=2 beep (1 second each)

3=3 beep (1 second each)

4. Selecting the setting number

Use the button to change the Setting number . (Fig. 4)

Direct the wireless remote controller toward the receiver of the indoor unit and

press the

button.

5. To select multiple functions continuously

Repeat select and to change multiple function settings continuously.

6. Complete function selection

Direct the wireless remote controller toward the sensor of the indoor unit and

press the

button.

Note: Be sure to write down the settings for all functions if any of the initial settings has been changed after the completion of installation work.

TCH122

11-6. ERROR HISTORY
1. Select Service from the Main menu, and press the [SELECT/HOLD] button.
Select Check with the F1 or F2 button, and press the [SELECT/HOLD] button.
2. Select Error history with the F1 or F2 button, and press the [SELECT/HOLD] button.
3. 16 error history records will appear. 4 records are shown per page, and the top record on the first page indicates the latest error record.

Service menu
Test run Input maintenance info. Settings Check Others
Main menu: RETURN Cursor

F1 F2 F3 F4

RETURN

SELECT HOLD

ON OFF

Check menu Error history Diagnosis
Service menu: MENU Cursor

Error history

Error Unt# dd/mm/yy

6831 6831 6831
6831

Check menu: RETURN

Page

Delete

F1 F2 F3 F4

RETURN

SELECT HOLD

ON OFF

4. Deleting the error history To delete the error history, press the F4 button (Delete) on the screen that shows error history. A confirmation screen will appear asking if you want to delete the error history.
Press the F4 button (OK) to delete the history.
Error history deleted will appear on the screen. Press the [RETURN] button to go back to the Check menu screen.

Error history Delete error history?
Cancel OK
Error history Error history deleted Check menu: RETURN

TCH122

11-7. SELF-DIAGNOSIS
11-7-1. PAR-41MAA
1. Select Service from the Main menu, and press the [SELECT/HOLD] button.
Select Check from the Service menu, and press the [SELECT/HOLD] button.
Select Diagnosis from the Check menu, and press the [SELECT/HOLD] button.
Select Self check with the F1 or F2 button, and press the [SELECT/HOLD] button.

Diagnosis Self check Remote controller check
Service menu: MENU Cursor

F1 F2 F3 F4

RETURN

SELECT HOLD

ON OFF

2. Select “Self check” from the Diagnosis menu, and press the [SELECT/HOLD] button to view the Self check screen.
With the F1 or F2 button, enter the M-NET address, and press the [SELECT/HOLD] button.

Self check M-NET address

Check code, unit number, attribute, and indoor unit demand signal ON/OFF status at the contact will appear. “-” will appear if no error history is available.

Self check M-NET address

Error Contact Off

Grp. IC

Return: RETURN

Reset

Select: SELECT Address

When there is no error history

Self check M-NET address

Error —-

– Grp. —

Contact Off

Return: RETURN

Reset

3. Resetting the error history
Press the F4 button (Reset) on the screen that shows the error history. A confirmation screen will appear asking if you want to delete the error history.
Press the F4 button (OK) to delete the error history. If deletion fails, “Request rejected” will appear, and “Unit not exist” will appear if indoor units that are correspond to the entered address are not found.

Self check M-NET address
Delete error history?
Cancel OK
Self check M-NET address
Error history deleted Return: RETURN

TCH122

11-7-2. PAR-SL101A-E
B
3 5

1. Press the

button 1 to stop the air conditioner.

is on), press the

button 3

to disable it ( is off).

2. Press the A

button 2 for 5 seconds.

3. Press the button 5 to select the refrigerant address (M-NET address) B

of the indoor

4. Press the

button 4.

indoor unit and the number of blinks of the OPERATION

INDICATOR lamp.

5. Press the

button 1.

A and the refrigerant address (M-NET address) B

check is completed.

TCH122

11-8. REMOTE CONTROLLER CHECK
If operations cannot be completed with the remote controller, diagnose the remote controller with this function.

1. Select “Service” from the Main menu, and press the [SELECT/HOLD] button.
Select “Check” from the Service menu, and press the [SELECT/HOLD] button.
Select “Diagnosis” from the Check menu, and press the [SELECT/HOLD] button.
Select “Remote controller check” with the F1 or F2 button, and press the [SELECT/HOLD] button.

Diagnosis
Self check Remote controller check

Service menu: MENU Cursor

F1 F2 F3 F4

RETURN

SELECT HOLD

ON OFF

2. Select “Remote controller check” from the Diagnosis menu, and press the [SELECT/ HOLD] button to start the remote controller check and see the check results.
To cancel the remote controller check and exit the “Remote controller check” menu screen, press the [MENU] or the [RETURN] button.
The remote controller will not reboot itself.

Remote controller check Start checking?
Begin: SELECT

F1 F2 F3 F4

RETURN

SELECT HOLD

ON OFF

3. OK:

No problems are found with the remote controller. Check other parts

for problems.

E3, 6832: There is noise on the transmission line, or the indoor unit or another

remote controller is faulty. Check the transmission line and the other

remote controllers.

NG (ALL0, ALL1): Send-receive circuit fault. The remote controller needs replacing.

ERC: The number of data errors is the discrepancy between the number of bits

in the data transmitted from the remote controller and that of the data that

was actually transmitted over the transmission line. If data errors are

found, check the transmission line for external noise interference.

Remote controller check results screen Remote controller check OK
Exit : SELECT

If the [SELECT/HOLD] button is pressed after the remote controller check results are displayed, remote controller check will end, and the remote controller will automatically reboot itself.
Check the remote controller display and see if anything is displayed (including lines). Nothing will appear on the remote controller display if the correct voltage (8.512 VDC) is not supplied to the remote controller. If this is the case, check the remote controller wiring and indoor units.

TCH122

HEAD OFFICE: TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU TOKYO 100-8310, JAPAN

MITSUBISHI ELECTRIC CONSUMER PRODUCTS (THAILAND) CO., LTD. 700/406 MOO 7, TAMBON DON HUA ROH, AMPHUR MUANG, CHONBURI 20000 THAILAND Published: Jul. 2023. No. TCH122 Made in Thailand

Specifications are subject to change without notice.