Mitsubishi Electric City Multi PMFY Series Operating manual

TECHNICAL & SERVICE MANUAL

Indoor unit

[Model names] [Service Ref.]

No. OC307

REVISED EDITION-F

INDOOR UNIT

CONTENTS

1. TECHNICAL CHANGES.....................2

2. SAFETY PRECAUTION .....................3

3. PART NAMES AND FUNCTIONS......5

4. SPECIFICATIONS ............................12

5. OUTLINES AND DIMENSIONS .......16

6. WIRING DIAGRAM...........................17

REFRIGERANT SYSTEM DIAGRAM....

8. TROUBLESHOOTING......................22

9. DISASSEMBLY PROCEDURE.........32

10. SERVICE PARTS LIST.....................36

Ceiling Cassettes

Series PMFY

R410A

March 2019

Revision:

• Some descriptions have

been modified in REVISED

EDITION-F.

OC307 REVISED

EDITION-E is void.

PMFY-P20VBM-E

PMFY-P25VBM-E

PMFY-P32VBM-E

PMFY-P40VBM-E

PMFY-P20VBM-E

PMFY-P20VBM-E#2

PMFY-P20VBM-ER4

PMFY-P25VBM-E

PMFY-P25VBM-E#2

PMFY-P25VBM-ER4

PMFY-P32VBM-E

PMFY-P32VBM-E#2

PMFY-P32VBM-ER4

PMFY-P40VBM-E

PMFY-P40VBM-E#2

PMFY-P40VBM-ER4

PMFY-P20VBM-E1

PMFY-P20VBM-ER3

PMFY-P25VBM-E1

PMFY-P25VBM-ER3

PMFY-P32VBM-E1

PMFY-P32VBM-ER3

PMFY-P40VBM-E1

PMFY-P40VBM-ER3

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

2 3

OC307F

1TECHNICAL CHANGES

PMFY-P20VBM-E PMFY-P20VBM-E1

PMFY-P25VBM-E PMFY-P25VBM-E1

PMFY-P32VBM-E PMFY-P32VBM-E1

PMFY-P40VBM-E PMFY-P40VBM-E1

1. FAN MOTOR (MF) has been changed.

2. CONTROLLER BOARD (I.B) has been changed.

PMFY-P20VBM-E1PMFY-P20VBM-E#2

PMFY-P25VBM-E1PMFY-P25VBM-E#2

PMFY-P32VBM-E1PMFY-P32VBM-E#2

PMFY-P40VBM-E1PMFY-P40VBM-E#2

1. CONTROLLER BOARD (I.B) has been changed.

2. PANEL has been changed.

PMP-40BM → PMP-40BMW

(White : 0.98Y 8.99/0.63) (Pure white : 6.4Y 8.9/0.4)

3. FAN MOTOR (MF) has been changed.

4. THERMISTOR (TH22, TH23) have been changed.

PMFY-P20VBM-E#2 PMFY-P20VBM-ER3

PMFY-P25VBM-E#2 PMFY-P25VBM-ER3

PMFY-P32VBM-E#2 PMFY-P32VBM-ER3

PMFY-P40VBM-E#2 PMFY-P40VBM-ER3

1. DRAIN PIPE has been changed.

2. JOINT SOCKET (FOR DRAIN PIPE) has been added.

PMFY-P20VBM-ER3 PMFY-P20VBM-ER4

PMFY-P25VBM-ER3 PMFY-P25VBM-ER4

PMFY-P32VBM-ER3 PMFY-P32VBM-ER4

PMFY-P40VBM-ER3 PMFY-P40VBM-ER4

1. INDOOR CONTROLLER BOARD has been changed. (S/W version up)

OC307F

Cautions for units utilizing refrigerant R410A

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.

Do not use refrigerant other than R410A.

If other refrigerant (R22 etc.) is used, chlorine in refrige-

rant can cause deterioration of refrigerant oil etc.

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 com-

pressor.

Do not use a charging cylinder.

If a charging cylinder is used, the composition of refrigera-

nt 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

If dirt, dust or moisture enters into refrigerant cycle, that can

cause deterioration of refrigerant oil or malfunction of com-

pressor.

If large amount of mineral oil enters, that can cause deterio-

ration 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 new refrigerant pipes.

In case of using the existing pipes for R22, be careful with

the followings.

· Change flare nut to the one provided with this product.

Use a newly flared pipe.

· Avoid using thin pipes.

Contamination inside refrigerant piping can cause deterio-

ration of refrigerant oil etc.

Make sure that the inside and outside of refrige-

rant piping is clean and it has no contaminants

such as sulfur, oxides, dirt, shaving particles, etc,

which are hazard 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.)

The refrigerant oil applied to flare and flange

connections must be ester oil, ether oil or

alkylbenzene oil in a small amount.

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.

Use the specified refrigerant only.

2SAFETY PRECAUTION

54 5

OC307F

[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.

[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.)

Gravimeter

Unit

[3] Service tools

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

No. Tool name Specifications

1Gauge manifold · Only for R410A

· Use the existing fitting specifications. (UNF1/2)

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

2Charge hose · Only for R410A

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

3Electronic scale —

4Gas leak detector · Use the detector for R134a, R407C or R410A.

5Adapter for reverse flow check · Attach on vacuum pump.

6Refrigerant charge base —

7Refrigerant cylinder · Only for R410A · Top of cylinder (Pink)

· Cylinder with syphon

8Refrigerant recovery equipment —

OC307F 5

3PART NAMES AND FUNCTIONS

3-1. Indoor Unit

Guide vane

Air flow can be changed to horizontal

by moving the Guide vane to the left or right.

Air intake

Returns air from room.

Filters

Remove dust and pollutants

from return air.

Auto Air Swing Vane

Disperses airflow up and

down and adjusts the angle

of airflow direction.

Horizontal Air Outlet

6 7

OC307F

Function buttons

F1 F2 F3 F4

Press to turn ON/OFF the indoor unit.

ON / OFF button

When the backlight is off, pressing any button turns

the backlight on and does not perform its function.

(except for the (ON / OFF) button)

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.

Press to save the setting.

SELECT button

Press to return to the previous screen.

RETURN button

Press to bring up the Main menu.

MENU button

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.

Backlit LCD

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.

ON / OFF lamp

Main display : Press to change the operation mode.

Main menu : Press to move the cursor down.

Function button F1

Main display : Press to decrease temperature.

Main menu : Press to move the cursor up.

Function button F2

Main display : Press to increase temperature.

Main menu : Press to go to the previous page.

Function button F3

Main display : Press to change the fan speed.

Main menu : Press to go to the next page.

Function button F4

Fri

Room

Set temp.

Mode Temp. Fan

Cool Auto

Main

Main display:

Cursor Page

Main menu

Vane·Louver·Vent. (Lossnay)

High power

Timer

Weekly timer

OU silent mode

Function guide

3-2. WIRED REMOTE CONTROLLER <PAR-30MAA/PAR-31MAA>

* The functions which can be used are restricted according to the model. : Supported : Unsupported

Function PAR-30MAA/PAR-31MAA PAR-21MAA

Slim CITY MULTI

Body Product size H × W × D (mm) 120 × 120 × 19 120 × 130 × 19

LCD Full Dot LCD Partial Dot LCD

Backlight

Energy-saving Energy-saving operation schedule

Automatic return to the preset temperature

Restriction Setting the temperature range restriction

Function Operation lock function

Weekly timer

On / Off timer

High Power

Manual vane angle

Wired remote controller function

OC307F

Fri

Mode Temp. Fan

Room

Cool Auto

Set temp.

Fri

Cool

Mode Temp. Fan

AutoSet temp.

Fri

Mode Temp. Fan

Room

Cool Auto

Set temp.

Fri

Cool

Mode Temp. Fan

AutoSet temp.

The main display can be displayed in two different modes: "Full" and "Basic".

he factory setting is "Full". To switch to the "Basic" mode, change the setting on the Main display setting.

* All icons are displayed for explanation.

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

Indoor unit operation mode appears here.

Operation mode

Preset temperature appears here.

Preset temperature

Current time appears here.

Clock (See the Installation Manual.)

Fan speed

Fan speed setting appears here.

Functions of the corresponding buttons appear here.

Button function guide

Appears when the ON/OFF operation is centrally controlled.

Appears when the operation mode is centrally controlled.

Appears when the preset temperature is centrally controlled.

Appears when the lter reset function is centrally controlled.

Indicates when lter needs maintenance.

Current room temperature appears here.

Room temperature

(See the Installation Manual.)

Appears when the buttons are locked.

Appears when the On/Off timer or Night setback function is

enabled.

Appears when the Weekly timer is enabled.

Appears while the units are operated in the energy-save

mode.

Appears when the built-in thermistor on the remote control-

ler is activated to monitor the room temperature.

appears when the thermistor on the indoor unit is acti-

vated to monitor the room temperature.

Indicates the vane setting.

Indicates the louver setting.

Indicates the ventilation setting.

Appears when the preset temperature range is restricted.

8 9

OC307F

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

Filter information

Error information

Energy saving

Auto return

Schedule

Night setback

Main menu Press the MENU button.

Move the cursor to the desired item with the F1 and F2 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

Service menu

Input maintenance info.

Function setting

Lossnay (CITY MULTI only)

Check

Self check

Maintenance password

Remote controller check

Test run

Clock

Drain pump test run

Auto descending panel

Menu structure

OC307F

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.

* Clock setting is required.

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.

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.

• Error 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.

Weekly timer Use to set the weekly operation On / Off times.

• Up to eight operation patterns can be set for each day.

* Clock setting is required.

* Not valid when the On/Off timer is enabled.

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 four 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.

* Clock setting is required.

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.

* Clock setting is required.

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.

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 default setting is "Full."

Contrast Use to adjust screen contrast.

Main menu list

10 11

OC307F

Setting and display items Setting details

Initial setting Display

details Make the settings for the remote controller related items as necessary.

Clock: The factory 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 OnlyAuto 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.

LOSSNAY

setting

(CITY MULTI

only)

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.

Refrigerant leak check: Refrigerant leaks can be judged.

Smooth maintenance: The indoor and outdoor maintenance data can be displayed.

Request cord: 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 Take the following steps 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.

This manual suits for next models

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