Mitsubishi PMFY-P20VBM, PMFY-P25VBM, PMFY-P32VBM, PMFY-P40VBM SERVICE MANUAL

2000

SPLIT-TYPE,HEAT PUMP AIR CONDITIONERS

No. OC220

TECHNICAL & SERVICE MANUAL

Series PMFY Ceiling Cassettes R407C R22

Indoor unit
[Model names]	[Service Ref.]

PMFY-P20VBM

PMFY-P25VBM

PMFY-P32VBM

PMFY-P40VBM

PMFY-P20VBM PMFY-P25VBM PMFY-P32VBM PMFY-P40VBM

CONTENTS

1. SAFETY PRECAUTION ·······················2

2. PART NAMES AND FUNCTIONS ········4

3. SPECIFICATION ···································6

4. OUTLINES AND DIMENSIONS··········10

5. WIRING DIAGRAM ·····························11

6. REFRIGERANT SYSTEM DIAGRAM ···12

7. TROUBLE SHOOTING·······················13

8. DISASSEMBLY PROCEDURE···········19

9. PARTS LIST········································22

INDOOR UNIT

1 SAFETY PRECAUTION

Cautions for devices that use R407C refrigerant.

·Do not use the existing refrigerant piping.

-The old refrigerant and refrigerator oil in the existing piping contains a large amount of chlorine which may cause the refrigerator oil of the new unit to deteriorate.

·Use “low residual oil piping”.

-If there is a large amount of residual oil (hydraulic oil, etc.) inside the piping and joints, deterioration of the refrigerator oil will result.

·Store the piping to be used during installation indoors and keep both ends of the piping sealed until just before brazing. (Store elbows and other joints in a plastic bag.)

-If dust, dirt, or water enters the refrigerant cycle, deterioration of the oil and compressor trouble may result.

·Use Suniso 4GS or 3GS (small amount) as the refrigerator oil to coat flares and flange connection parts.

-The refrigerator oil used with the air conditioner is highly hygroscopic. If it is used, water may be mixed in and deterioration of the refrigerator oil may result.

·Use liquid refrigerant to seal the system.

-If gas refrigerant is used to seal the system, the composition of the refrigerant in the cylinder will change and performance may drop.

·Do not use a refrigerant other than R407.

-If another refrigerant (R22, etc.) is used, the chlorine in the refrigerant may cause the refrigerator oil to deteriorate.

·Use a vacuum pump with a reverse flow check valve.

-The vacuum pump oil may flow back into the refrigerant cycle and cause the refrigerator oil to deteriorate.

2

[1] Service tools

Use the below service tools as exclusive tools for R407C refrigerant.

No.	Tool name	Specifications
1	Gauge manifold	·Only for R407C.
		·Use the existing fitting SPECIFICATIONS. (UNF7/16)
		·Use high-tension side pressure of 35kgf/cm or over.
		2
2	Charge hose	·Only for R407C.
		·Use pressure performance of 52kgf/cm or over.
3	Electronic scale
4	Gas leak detector	·Use the detector for R134a or R407C.
5	Adapter for reverse flow check.	·Attach on vacuum pump.
6	Refrigerant charge base.
7	Refrigerant cylinder.	·For R407C·Top of cylinder (Brown)
		·Cylinder with syphon
8	Refrigerant recovery equipment.

[2] Notice on repair service

·After recovering the all refrigerator in the unit, proceed to working. ·Do not release the refrigerant in the air.

·After complete the repair service, recharge the cycle with the specified amount of the liquid refrigerant.

[3] Refrigerant recharging

(1) Refrigerant recharging process

1Direct enclosure from the bomb.

·Confirm that R407C bomb on the market are syphon pipe.

·Leave the syphon pipe bomb raising and recharge it. (By liquid refrigerant)

Unit

Gravimeter

(2) Recharge in refrigerant leakage case

·After recovering the all refrigerator in the unit, proceed to working. ·Do not release the refrigerant in the air.

·After complete the repair service, recharge the cycle with the specified amount of the liquid refrigerant.

3

2 PART NAMES AND FUNCTIONS

● Indoor (Main) Unit

Auto Air Swing Vane

Disperses airflow up and down and adjusts the angle of airflow direction.

Horizontal Air Outlet

Guide vane

Air flow can be changed to horinzontally

by moving the Guide vane to the left or right.

Filters	Air intake
Remove dust and pollutants	Inhales air from room.
from inhaled air.

● Remote controller	[PAR-F25MA]
	● Once the controls are set, the same operation mode can
	be repeated by simply pressing the ON/OFF button.
● Operation buttons

TIMER button

This switches between continuous operation and the timer operation.

OPERATION SWITCH button

Press this button to switch the cooler electronic dry (dehumidify) automatic and heater modes.

TIME SETTING button

This sets of switches the current time, start time and stop time.

AIR SPEED button

This sets the ventilation fan speed.

ON/OFF button

This switches between the operation and stop modes each time it is pressed. The lamp on this button lights during operation.

TEMP. ADJUSTMENT button

This sets the room temperature the temperature setting can be performed in 1: units

Setting range

Cooler 19: to 30: Heater 17: to 28:

LOUVER button

This switch the horizontal fan motion

NO and OFF.

(This button does not operate in this model)

AIR DIRECTION button

This adjusts the vertical angle of the ventilation.

FILTER button

This resets the filter service indication display

CHECK-TEST RUN button

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

4

● Display

CENTRALLY CONTROLLED display

This indicates when the unit is controlled by optional features such as central control type remote controller.

TIMER display

This indicates when the continuous operation and time operation modes are set.

It also display the time for the timer operation at the same time as when it is set.

OPERATION MODE display

This indicates the operation mode.

STANDBY display

This indicates when the standby mode is set from the time the sleep operation starts until the heating air is discharged.

DEFROST display

This indicates when the defrost operation is performed.

	CLOCK display	In this display example on the bot-
		tom left, a condition where all dis-
	The current time , start time and stop	play lamps light is shown for expla-
	time can be displayed in ten second	nation purposes although this differs
	intervals by pressing the time switch	from actual operation.
	button. The start time or stop time is
	always displayed during the timer
	operation.
		AIR DIRECTION display
		The selected fan speed is displayed.
		FAN SPEED display
		This displays the air direction.
		ROOM TEMPERATURE display
		The temperature of the suction air is
		displayed during operation. The dis-
		play range is 8° to 39°C. The display
		flashes 8°C when the actual temper-
		ature is less than 8° and flashes
		39°C when the actual temperature is
		greater than 39°C.
		Operation lamp
	5	This lamp lights during operation,
		goes off when the unit stops and
		flashes when a malfunction occurs.
		CHECK MODE
		display
		TEST RUN
		This display lights in the check mode
		or when a test operation is per-
		formed.

CHECK display
		SET TEMPERATURE display		POWER display
This indicates when a malfunction
has occurred in the unit which should		This displays the selected setting		This lamp lights when electricity is
be checked.
		temperature.		supplied to the unit.

Caution

FILTER display

This lamp lights when the filter need to be cleaned.

●Only the Power display lights when the unit is stopped and power supplied to the unit.

●When the central control remote control unit, which is sold separately, is used the ON-OFF button, operation switch button and TEMP. adjustment button do not operate.

●“NOT AVAILABLE” is displayed when the Air speed button are pressed.This indicates that this room unit is not equipped with the fan direction adjustment function and the louver function.

●When power is turned ON for the first time, it is normal that “H0” is displayed on the room temperature indication (For max. 2minutes). Please wait until this “H0” indication disappear then start the operation.

5

3 SPECIFICATION

3-1. Specification

Item

Power

Cooling capacity

Heating capacity

characteristic	Input	Cooling
		Heating
	Current	Cooling
Electric		Heating
	factor	Heating
	Power	Cooling

Exterior (munsell symbol)

Height

Dimensions Width

Depth

Heat exchanger

		Fan No
	F	Air flow #3
	a
		External
	n
		static pressure
		Fan motor
		output
		Insulator

Air filter

Gas

Pipe side

dimensions Liquid side

Unit drain pipe size

Noise level #3

Product weight

	PMFY-P20VBM	PMFY-P25VBM	PMFY-P32VBM	PMFY-P40VBM
V·Hz		Single phase 220V-240V 50 Hz/220V 60Hz
kcal/h	2,000	2,500	3,150	4,000
kW	2.3	2.9	3.7	4.7
Btu/h	7,900	9,900	12,500	15,900
kcal/h	2,250	2,800	3,550	4,500
kW	2.6	3.3	4.1	5.2
Btu/h	8,900	11,100	14,100	17,900
kW	0.042	0.044	0.044	0.054
kW	0.042	0.044	0.044	0.054
A	0.20	0.21	0.21	0.26
A	0.20	0.21	0.21	0.26
%	95—88	95—87	95—87	94—87
%	95—88	95—87	95—87	94—87
	-Unit : Galvanized sheets · Standard grills : ABS resin acrylic coating			Munsell<0.98Y 8.99/0.63>
mm			230<30>
mm		854<1,000>
mm		395<470>
			Cross fin
		Line flow fan 1
k/min	8.7-8.0-7.2-6.5	9.3-8.6-8.0-7.3		10.7-9.7-8.7-7.7
Pa			0
kW			0.028
		Polyethylene sheet
		PP honeycomb fabric
[mm		12.7(1/2")
[mm		6.35(1/4")
[mm		O.D.25 (PVC pipe VP-20 connectable)
dB	35-33-30-27	37-36-34-32		39-37-35-33
kg		14<3.0>

Note 1.	Rating conditions
	Cooling:	Indoor:	D.B. 27°C	W.B. 19.5°C
		outdoor:	D.B. 35°C
	Heating:	Indoor:	D.B. 21°C
		outdoor:	D.B. 7°C	W.B. 6°C
Note 2.	The number indicated in < > is just for the grille.
Note 3.	Air flow and the noise level are indicated as High-Middium 1-Middium 2-Low.

6

3-2. Air capacity taken from outside

PMFY-P·VBM series are possible to be taken air from outside. When taking air from the outside, the duct fan can be used to. The air capacity should be 20% or less of the air flow SPEC(Hi).

250 288.5

90-

4-{2.8

		100
		{
		108
		{
		122
	Flesh air intake hole	Flesh air intake hole
	(Knock out)	(Knock out)
	Air flow	Air capacity taken outside
	(Hi)
PMFY-P20VBM	8.7m3/min	Max 1.74m3/min
PMFY-P25VBM	9.3m3/min	Max 1.86m3/min
PMFY-P32VBM	9.3m3/min	Max 1.86m3/min
PMFY-P40VBM	10.7m3/min	Max 2.14m3/min

Interlocking operation method with duct fan (Booster fan)

●Whenever the indoor unit is operating, the duct fun also operates.

(1)Connect the optional multiple remote controller adapter(PAC-SA88HA-E)to the connector CN51 on the indoor controller board.

(2)Drive the relay after connecting the 12V DC relay between the Yellow and Orange connector lines.

(w)Use a relay under 1W.

MB: Electromagnetic switch power relay for duct fan. X: Auxiliary relay (12V DC LY-1F)

			Be sure to secure insulation		~
			material by tape and such
CN51	5	Green
on			Yellow
indoor unit
	1		Orange		MB
board
	Connector (5P)		Red
	Package side		Brown
			Multiplr remote	Installation at site
			controller adapter	Be sure to secure insulation
Indoor controller board			PAC-SA88HA-E	material by tape and such

Distance between indoor controller board and relay must be within 10m.

Multiple remote controller adapter PAC-SA88HA-E

CN51

How to read curves

	Curve in the	Duct characteristics
1		at site
	left praphs.
0		A	C
	Q	B

2

C A

E

Q

3

D

A

Q

Qa

Q…Planned amount of fresh air intake <m3/min>

A…Static pressure loss of fresh air intake duct system with air flow amount Q <mmAq>

B…Forced static pressure at air condi - tioner inlet with air flow amount Q <mmAq>

C…Static pressure of booster fan with

air flow amount Q	<mmAq>
D…Static pressure loss	increase

amount of fresh air intake dust system for air flow amount Q

<mmAq> E…Static pressure of indoor unit with

air flow amount Q <mmAq> Qa…Estimated amount of fresh air

intake with out D <m3/min>

Characteristic diagram of air capacity taken from outside of PMFY-P·VBM

(Pa)	50.0
	0.0
pressure											2 intakes
											1 intake
Static
	-50.0
	-100.0
							1.5		2.0		2.5
	0.0		0.5		1.0
					Air flow (m3/min)

7

3-3. NOISE CRITERION CURVES

PMFY-P20VBM					NOTCH		SPL(dB)	LINE
						Hi	35
						Mi1	33
						Mi2	30
						Lo	27
	90
BAR	80
MICRO
0.002	70							NC-70
dB re
LEVEL,	60
								NC-60
PRESSURE	50
								NC-50
	40
SOUND
								NC-40
BAND	30
								NC-30
OCTAVE	20
								NC-20
	APPROTIMATE TERESHOLD OF REARING
	FOR CONTINUOUS NOISE
	10
	63	125	250	500	1000	2000	4000	8000

BAND CENTER FREQUENCIES, Hz

PMFY-P40VBM						NOTCH		SPL(dB)	LINE
							Hi	39
							Mi1	37
							Mi2	35
							Lo	33
	90
BAR	80
MICRO
0.002	70								NC-70
dB re
LEVEL,	60
									NC-60
PRESSURE	50
									NC-50
	40
SOUND
									NC-40
BAND	30
									NC-30
OCTAVE	20	APPROTIMATE
		TERESHOLD OF
		REARING FOR							NC-20
		CONTINUOUS
		NOISE
	10	63	125	250	500	1000	2000	4000	8000

BAND CENTER FREQUENCIES, Hz

PMFY-P25VBM						NOTCH		SPL(dB)	LINE
PMFY-P32VBM							Hi	37
							Mi1	36
							Mi2	34
							Lo	32
	90
BAR	80
MICRO
0.002	70								NC-70
dB re
LEVEL,	60
									NC-60
PRESSURE	50
									NC-50
	40
SOUND
									NC-40
BAND	30
									NC-30
OCTAVE	20	APPROTIMATE
		TERESHOLD OF
		REARING FOR							NC-20
		CONTINUOUS
		NOISE
	10	63	125	250	500	1000	2000	4000	8000

BAND CENTER FREQUENCIES, Hz

UNIT

CEILING

1.5m

MICROPHON

Ambient temperature 27:

Test conditions are based on JIS Z8731

8