Mitsubishi Electric PKA-A18HA6, PKA-A12HA6, PCA, PCA-A24KA6, PCA-A36KA6 Service Manual

...

SERVICE MANUAL

Notes:

• This manual describes service data of the indoor units only.

• RoHS compliant products have <G> mark on the spec name plate.

CONTENTS

1. REFERENCE MANUAL

...................................

2. SAFETY PRECAUTION

...................................

3. PARTS NAMES AND FUNCTIONS

.................

4. SPECIFICATIONS

...........................................

5. NOISE CRITERION CURVES

.........................11

6. OUTLINES AND DIMENSIONS

...................... 12

7. WIRING DIAGRAM

.........................................13

8. REFRIGERANT SYSTEM DIAGRAM

............

9. TROUBLESHOOTING

....................................

10. SPECIAL FUNCTION

.....................................

11. DISASSEMBLY PROCEDURE

.......................

Indoor unit [Model Name] [Service Ref.]

PARTS CATALOG (OCB580)

INDOOR UNIT

PKA-A12HA6

PKA-A18HA6

WIRED REMOTE

CONTROLLER

(Option)

IR WIRELESS REMOTE CONTROLLER (Option)

December 2014

No. OCH580

COOL

DRY

AUTO

FAN

HEAT

SPLIT-SYSTEM HEAT PUMP

REFERENCE MANUAL

1-1. OUTDOOR UNIT SERVICE MANUAL

Model Name Service Ref. Service Manual No.

PUZ-A18/24/30/36NHA6 PUZ-A18/24/30/36NHA6-BS

OCH577

OCB577

PUY-A12/18/24/30/36NHA6 PUY-A12/18/24/30/36NHA6-BS

Radio frequency interface Wired remote controller IR wireless remote controller

COOL

DRY

AUTO

FAN

HEAT

RF thermostat

Remote controller (Optional parts)

OCH580

SAFETY PRECAUTION

Cautions for units utilising refrigerant R410A

2-2. CAUTIONS RELATED TO NEW REFRIGERANT

2-1. ALWAYS OBSERVE FOR SAFETY

Before obtaining access to terminal, all supply circuits must be disconnected.

Use new refrigerant pipes.

Charge refrigerant from liquid phase of gas cylinder.

If the refrigerant is charged from gas phase, composition change may occur in refrigerant and the efficiency will be lowered.

Use a vacuum pump with a reverse flow check valve.

Vacuum pump oil may flow back into refrigerant cycle and that can cause deterioration of refrigerant oil, etc.

Use the following tools specifically designed for use with R410A refrigerant.

The following tools are necessary to use R410A refrigerant.

Handle tools with care.

If dirt, dust or moisture enters into refrigerant cycle, that can cause deterioration of refrigerant oil or malfunction of compressor.

Do not use a charging cylinder.

If a charging cylinder is used, the composition of refrigerant will change and the efficiency will be lowered.

Flare tool

Electronic refrigerant charging scale

Vacuum pump adaptor

Size adjustment gauge

Gauge manifold

Torque wrench

Gas leak detector

Charge hose

Tools for R410A

Contamination inside refrigerant piping can cause deterioration of refrigerant oil, etc.

If large amount of mineral oil enters, that can cause deterioration of refrigerant oil, etc.

The refrigerant oil applied to flare and flange connections must be ester oil, ether oil or alkylbenzene oil in a small amount.

Make sure that the inside and outside of refrigerant piping is clean and it has no contaminants such as sulfur, oxides, dirt, shaving particles, etc, which are hazards to refrigerant cycle. In addition, use pipes with specified thickness.

Store the piping indoors, and both ends of the piping sealed until just before brazing. (Leave elbow joints, etc. in their packaging.)

If dirt, dust or moisture enters into refrigerant cycle, that can cause deterioration of refrigerant oil or malfunction of compressor.

Do not use refrigerant other than R410A.

If other refrigerant (R22, etc.) is used, chlorine in refrigerant can cause deterioration of refrigerant oil, etc.

Ventilate the room if refrigerant leaks during operation. If refrigerant comes into contact with a flame, poisonous gases will be released.

Use the specified refrigerant only.

Never use any refrigerant other than that specified.

Doing so may cause a burst, an explosion, or fire when the unit is being used, serviced, or disposed of. Correct refrigerant is specified in the manuals and on the spec labels provided with our products. We will not be held responsible for mechanical failure, system malfunction, unit breakdown or accidents caused by failure to follow the instructions.

[1] Cautions for service

(1) Perform service after recovering the refrigerant left in unit completely. (2) Do not release refrigerant in the air. (3) After completing service, charge the cycle with specified amount of refrigerant. (4) When performing service, install a filter drier simultaneously.

Be sure to use a filter drier for new refrigerant.

OCH580

Gravimeter

Unit

[3] Service tools

Use the below service tools as exclusive tools for R410A refrigerant.

PARTS NAMES AND FUNCTIONS

Indoor unit

Filter

Air intake

Louver

Air outlet

Vane

No. Tool name Specifications

Gauge manifold · Only for R410A

· Use the existing fitting

specifications

. (UNF1/2)

· Use high-tension side pressure of 5.3MPa·G or over.

Charge hose · Only for R410A

· Use pressure performance of 5.09MPa·G or over.

Electronic scale

—

Gas leak detector

· Use the detector for R134a, R407C or R410A.

Adaptor for reverse flow check

· Attach on vacuum pump.

Refrigerant charge base

—

Refrigerant cylinder · Only for R410A · Top of cylinder (Pink)

· Cylinder with syphon

Refrigerant recovery equipment

—

[2] Additional refrigerant charge

When charging directly from cylinder

· Check that cylinder for R410A on the market is syphon type.

· Charging should be performed with the cylinder of syphon stood vertically. (Refrigerant is charged from liquid phase.)

OCH580

Wired remote controller (Option)

Function buttons

4 3 2 1

7 8 9

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.

Fri

Room

Set temp.

Mode Temp. Fan

Cool

Main

Main display:

Cursor Page

Main menu

Vane·Louver·Vent. (Lossnay) High power Timer Weekly timer OU silent mode

Main display Main menu

Function guide

▌1 [ON/OFF] button

Press to turn ON/OFF the indoor unit.

▌2 [SELECT] button

Press to save the setting.

▌3 [RETURN] button

Press to return to the previous screen.

▌4 [MENU] button

Press to bring up the Main menu.

▌5 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)

▌6 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.

▌7 Function button [F1]

Main display: Press to change the operation mode.

Main menu: Press to move the cursor down.

▌8 Function button [F2]

Main display: Press to decrease temperature.

Main menu: Press to move the cursor up.

▌9 Function button [F3]

Main display: Press to increase temperature.

Main menu: Press to go to the previous page.

▌0 Function button [F4]

Main display: Press to change the fan speed.

Main menu: Press to go to the next page.

Controller interface

7 8 9

OCH580

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.)

▌3

Appears when the On/Off timer, Night setback, or Auto-off timer function is enabled.

appears when the timer is disabled by the centralized control

system.

▌4

Appears when the Weekly timer is enabled.

▌5

Appears while the units are operated in the energy-save mode. (Will not appear on some models of indoor units)

▌6

Appears while the outdoor units are operated in the silent mode.

▌7

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.

▌8

Indicates the vane setting.

▌9

Indicates the louver setting.

▌)

Indicates the ventilation setting.

▌!

Appears when the preset temperature range is restricted.

▌1 Operation mode

Indoor unit operation mode appears here.

▌2 Preset temperature

Preset temperature appears here.

▌3 Clock (See the Installation Manual.)

Current time appears here.

▌4 Fan speed

Fan speed setting appears here.

▌5 Button function guide

Functions of the corresponding buttons appear here.

▌6

Appears when the ON/OFF operation is centrally controlled.

▌7

Appears when the operation mode is centrally controlled.

▌8

Appears when the preset temperature is centrally controlled.

▌9

▌0

▌1 Room temperature (See the Installation Manual.)

Current room temperature appears here.

▌2

Appears when the buttons are locked.

* All icons are displayed for explanation.

Fri

Mode Temp. Fan

Room

Cool

Set temp.

Fri

Cool

Mode Temp. Fan

Set temp.

)

2 3 4 5 6 7 8

Most settings (except ON/OFF, mode, fan speed, temperature) can be made from the Menu screen. (Refer to operation manual included with remote controller.)

Display

Appears

OCH580

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

Energy saving

Auto return

Schedule

Night setback

Main menu

Press the

button.

Move the cursor to the desired item with the

and

buttons, and press the

SELECT

button.

Vane · Louver · Vent. (Lossnay)

High power

Weekly timer

Restriction

Maintenance

Initial setting

On / Off timer

Auto-Off timer

Temp. range

Operation lock

Manual vane angle

Main / Sub

Timer

Main display

Contrast

Display details

Auto mode

Administrator password

Language selection

Service

Input maintenance info.

Function setting

Lossnay (City Multi only)

Check

Self check

Maintenance password

Remote controller check

Test run

Clock

Auto descending panel

Menu structure

Filter Information

Error Information

OCH580

Setting and display items Setting details

Vane · Louver · Vent. (Lossnay) Use to set the vane angle.

• Select a desired vane setting from ve 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 On/Off timer* Use to set the operation On/Off times.

• Time can be set in 5-minute increments.

Auto-Off timer Use to set the Auto-Off time.

• Time can be set to a value from 30 to 240 in 10-minute increments.

Weekly timer* 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.)

Restriction Temp. range 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 saving Auto return Use to get the units to operate at the preset temperature after performing energy-save operation for a

specied 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.)

Schedule* Set the start/stop times to operate the units in the energy-save mode for each day of the week, and set the

energy-saving rate.

• Up to 4 energy-save 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.

Night setback* Use to make Night setback settings.

• Select "Yes" to enable the setting, and "No" to disable the setting. The temperature range and the start/stop times can be set.

Filter information Use to check the lter status.

• The lter sign can be reset.

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.)

Maintenance Auto descending panel Auto descending panel (Optional parts) Up / Down you can do.

Manual vane angle Use to set the vane angle for each vane to a xed position.

Initial setting Main/Sub When connecting two remote controllers, one of them needs to be designated as a sub controller.

Clock Use to set the current time.

Main display Use to switch between "Full" and "Basic" modes for the Main display.

• The initial setting is "Full."

Contrast Use to adjust screen contrast.

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.

Auto mode 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.

Administrator password

The administrator password is required to make the settings for the following items.

• Timer setting • Energy-save setting • Weekly timer setting

• Restriction setting • Outdoor unit silent mode setting • Night set back

Language selection Use to select the desired language.

Service 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

Function setting Make the settings for the indoor unit functions via the remote controller as necessary. Check Error history: Display the error history and execute “delete error history”.

Refrigerant leak check: Refrigerant leaks can be judged. Smooth maintenance: The indoor and outdoor maintenance data can be displayed. Request code: Details of the operation data including each thermistor temperature and error history can be checked.

Self check Error history of each unit can be checked via the remote controller. Maintenance password Use to change the maintenance password. Remote controller check

When the remote controller does not work properly, use the remote controller checking function to troublushoot the problem.

Main menu list

* Clock setting is required.

OCH580

● IR wireless remote controller (Option)

ON/OFF TEMP

FAN

VANE

TEST RUN

AUTO STOP

AUTO START

min

LOUVER

MODE

CHECK

RESETSET CLOCK

MODEL SELECT

NOT AVAILABLE

CHECK

TEST RUN

°C

AMPM

VANE CONTROL button

Used to change the air flow direction.

CLOCK button

RESET button

SET button

ON/OFF button

The unit is turned ON and OFF alternately

each time

the button is pressed.

MODE SELECT button

Used to switch the operation mode between cooling, drying, heating, auto and fan mode.

CHECK-TEST RUN buttons

Only press this button to perform an inspection check or test operation. Do not use it for normal operation.

FAN SPEED SELECT button

Used to change the fan speed.

TIMER display

Displays when in timer operation or when setting timer.

buttons

SET TEMPERATURE button sets any desired room temperature.

CLOCK display

Displays the current time.

“ ” “ ” display

Displays the order of timer operation.

“ ” “ ” display

Displays whether timer is on or off.

Buttons used to set the “hour and minute” of the current time and timer settings.

“h” and “min” buttons

display

FAN SPEED display indicates which fan speed has been selected.

display

The vertical direction of air flow is indicated.

display

Blinks when model is selected.

display

CHECK and TEST RUN display indicate that the unit is being checked or test-run.

display

OPERATION MODE display Operation mode display indicates which operation mode is in effect.

AUTO STOP (OFF timer): when this switch is set, the air conditioner will be automatically stopped at the preset time. AUTO START (ON timer): when this switch is set, the air conditioner will be automatically started at the preset time.

MODEL SELECT

CHECK

TEST RUN

LOUVER button

Changes left/right airflow direction. (Not available for this model.)

SET TEMP. display indicates the desired temperature which is set.

Lights up while the signal is transmitted to the indoor unit when the button is pressed.

TIMER CONTROL buttons

OCH580

SPECIFICATIONS

A A

F.L.A

/min(CFM)

Pa(mmAq)

dB mm (in) mm (in) mm (in) mm (in)

kg (lb)

Service Ref.

Power supply(phase, cycle, voltage)

Max. Fuse Size

Min.Circuit Ampacity External finish Heat exchanger Fan Fan(drive) o No.

Fan motor output

Fan motor

Airflow(Low-Middle-High)

External static pressure Operation control & Thermostat Noise level(Low-Middle-High) Field drain pipe O.D. Dimensions

Weight

D H

INDOOR UNIT

PKA-A12HA6

1 phase, 60 Hz, 208/230 V

White Munsell 1.0Y 9.2/0.2

Plate fin coil

Line flow fan (direct) o 1

0.030

0.33

Dry: 9-10.5-12 (320-370-425)

Wet: 8-9.5-11 (290-335-380)

0(direct blow)

Remote controller & built-in

36-40-43

16(5/8)

898 (35-3/8)

249 (9-13/16)

295 (11-5/8)

13 (29)

1 phase, 60 Hz, 208/230 V

Plate fin coil

0(direct blow)

Remote controller & built-in

A A

F.L.A

K/min(CFM)

Pa(mmAq)

mm (in) mm (in) mm (in)

kg (lb)

Service Ref.

Power supply(phase, cycle, voltage)

Max. Fuse Size

Min.Circuit Ampacity

External finish Heat exchanger Fan Fan(drive) o No.

Fan motor output Fan motor

Airflow(Low-Middle-High)

External static pressure Operation control & Thermostat Noise level(Low-Middle-High) Field drain pipe O.D. Dimensions

Weight

D H

INDOOR UNIT

PKA-A18HA6

White Munsell 1.0Y 9.2/0.2

0.030

0.33

Dry: 9-10.5-12 (320-370-425)

Wet: 8-9.5-11 (290-335-380)

36-40-43

16(5/8)

898 (35-3/8)

249 (9-13/16)

295 (11-5/8)

13 (29)

Line flow fan (direct) o 1

mm (in)

OCH580

NOISE CRITERION CURVES

63 125 250 500 1000 2000 4000 8000

APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB (0dB=0.0002 µbar)

BAND CENTER FREQUENCIES, Hz

PKA-A12HA6 PKA-A18HA6

High

NOTCH

Low

SPL(dB)

LINE

UNIT

WALL

3.3ft

MICROPHONE

OCH580

+ 25 hidden pages

Mitsubishi Electric PKA-A18HA6, PKA-A12HA6, PCA, PCA-A24KA6, PCA-A36KA6 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual