Mitsubishi Electronics PUHY-80TMU-A, 100TMU-A User Manual

A-100TMU A,-80TMU-PUHY Handbook Service

AIR CONDITIONERS CITY MULTI Series Y

Models PUHY-80TMU-A, 100TMU-A

Service Handbook

Safety precautions

Before installation and electric work

sBefore installing the unit, make sure you read all the “Safety precautions”.

sThe “Safety precautions” provide very important points regarding safety. Make sure you follow them.

sThis equipment may have an adverse effect on equipment on the same electrical supply system.

sPlease report to or take consent by the supply authority before connection to the system.

Symbols used in the text

Warning:

Describes precautions that should be observed to prevent danger of injury or death to the user.

Caution:

Describes precautions that should be observed to prevent damage to the unit.

Symbols used in the illustrations

: Indicates an action that must be avoided.

: Indicates that important instructions must be followed.

: Indicates a part which must be grounded.

: Indicates that caution should be taken with rotating parts.

(This symbol is displayed on the main unit label.) <Color: Yellow>

: Indicates that the main switch must be turned off before servicing. (This symbol is displayed on the main unit label.) <Color: Blue>

: Beware of electric shock (This symbol is displayed on the main unit label.) <Color: Yellow>

: Beware of hot surface (This symbol is displayed on the main unit label.) <Color: Yellow>

ELV : Please pay attention to electric shock because this is not Safety Extra Low-Voltage (SELV) circuit.

And at servicing, please shut down the power supply for both Indoor Unit and Outdoor Unit .

Warning:

Carefully read the labels affixed to the main unit.

Warning:

•Ask the dealer or an authorized technician to install the air conditioner.

-Improper installation by the user may result in water leakage, electric shock, or fire.

•Install the air unit at a place that can withstand its weight.

-Inadequate strength may cause the unit to fall down, resulting in injuries.

•Use the specified cables for wiring. Make the connections securely so that the outside force of the cable is not applied to the terminals.

-Inadequate connection and fastening may generate heat and cause a fire.

•Prepare for typhoons and other strong winds and earthquakes and install the unit at the specified place.

-Improper installation may cause the unit to topple and result in injury.

•Always use an air cleaner, humidifier, electric heater, and other accessories specified by Mitsubishi Electric.

-Ask an authorized technician to install the accessories. Improper installation by the user may result in water leakage, electric shock, or fire.

•Never repair the unit. If the air conditioner must be repaired, consult the dealer.

-If the unit is repaired improperly, water leakage, electric shock, or fire may result.

•Do not touch the heat exchanger fins.

-Improper handling may result in injury.

•If refrigerant gas leaks during installation work, ventilate the room.

-If the refrigerant gas comes into contact with a flame, poisonous gases will be released.

•Install the air conditioner according to this Installation Manual.

-If the unit is installed improperly, water leakage, electric shock, or fire may result.

•Have all electric work done by a licensed electrician according to “Electric Facility Engineering Standard” and “Interior Wire Regulations”and the instructions given in this manual and always use a special circuit.

-If the power source capacity is inadequate or electric work is performed improperly, electric shock and fire may result.

•Securely install the cover of control box and the panel.

-If the cover and panel are not installed properly, dust or water may enter the outdoor unit and fire or electric shock may result.

•When installing and moving the air conditioner to another site, do not charge it with a refrigerant different from the refrigerant (R22) specified on the unit.

-If a different refrigerant or air is mixed with the original refrigerant, the refrigerant cycle may malfunction and the unit may be damaged.

•If the air conditioner is installed in a small room, measures must be taken to prevent the refrigerant concentration from exceeding the safety limit even if the refrigerant should leak.

-Consult the dealer regarding the appropriate measures to prevent the safety limit from being exceeded. Should the refrigerant leak and cause the safety limit to be exceeded, hazards due to lack of oxygen in the room could result.

•When moving and reinstalling the air conditioner, consult the dealer or an authorized technician.

-If the air conditioner is installed improperly, water leakage, electric shock, or fire may result.

•After completing installation work, make sure that refrigerant gas is not leaking.

-If the refrigerant gas leaks and is exposed to a fan heater, stove, oven, or other heat source, it may generate noxious gases.

•Do not reconstruct or change the settings of the protection devices.

-If the pressure switch, thermal switch, or other protection device is shorted and operated forcibly, or parts other than those specified by Mitsubishi Electric are used, fire or explosion may result.

Contents
1 COMPONENT OF EQUIPMENT ...............................................		1
[1]	Appearance of Components............................................	1
[2] Refirigerant Circuit Diagram and Thermal Sensor...........		6
[3] PUHY-80, 100TMU-A ELECTRICAL WIRING
	DIAGRAM .......................................................................	7
[4]	Standard operation data ..................................................	9
[5] Function of dip SW and rotary SW ................................		11
2 TEST RUN ............................................................................... 15
[1]	Before Test Run ............................................................	15
[2]	Test Run Method ...........................................................	19
3 GROUPING REGISTRATION OF INDOOR UNITS WITH
M-NET REMOTE CONTROLLER ...........................................		20
4 CONTROL ............................................................................... 26
[1] Control of Outdoor Unit .................................................		26
[2]	Operation Flow Chart ....................................................	31
[3] List of Major Component Functions ............................... 36
[4] Resistance of Temperature Sensor...............................		38
5 REFRIGERANT AMOUNT ADJUSTMENT .............................. 39
[1] Refrigerant Amount and Operating Characteristics.......		39
[2] Adjustment and Judgement of Refrigerant Amount.......		39
6 TROUBLESHOOTING.............................................................		44
[1]	Principal Parts................................................................ 44
[2] Self-diagnosis and Countermeasures Depending on the
	Check Code Displayed ..................................................	62
[3]	LED Monitor Display ......................................................	83

Propeller fan

Fan motor

- 1 -

Rear Controller Box

INV board

MAIN board

Choke coil(L2)

Interrigent Power Module(IPM)

Magnetic contactor(52C)

Capacitor (C1)(Smoothing capacitor)

Gate Amplifier board(G/A board)

Diode stack(DS)

Power board

Terminal block(TB7)Transmission

Terminal	Terminal
block (TB1)	block (TB3)
Power source	Transmission

- 2 -

MAIN board

CNS1 M-NET

Transmission (DC30V)

CNS2 M-NET Transmission (Centralized control) (DC30V)

CN40 M-NET

Transmission

Power supply

CNVCC3 Power source for contorl 1-2 DC30 V 1-3 DC30 V 4-6 DC12 V 5-6 DC5 V

CN51 Indication distance 3-4 Compressor ON/

Off 3-4 trouble

LD1

Service LED

CNRS53

Serial transmission to

INV board

CN3D

SW1,2,3,4 Dip Switch

CN3S

CNFAN1 control for MF1

CN20 CNAC3 power

source

- 3 -

INV board

CNAC2	CN52C	CNRS2
Power source	Control for	Serial transmission
1 L2	52C	to MAIN board
5 N
CNFAN

Control for

MF1

CNDC2

1-3 DC310 V

CN15V2

Power supply IPM control 1-2 DC15 V

5-6 DC15 V

9-0 DC15 V

C-D DC15 V

CNVCC4

CNL2

Choke coil

CNVCC2 power supply

CNDR2 IPM control signal

CNCT

CNTH

SW1

- 4 -

G/A board

CNDC1

1 - 3 DC310V

DC310V

CN15V1 Power Supply IPM control 1 - 2 DC15V 5 - 6 DC15V 9 - 0 DC15V C - D DC15V

CNDR1

IPM control signal

Power board

- 5 -

[2] Refirigerant Circuit Diagram and Thermal Sensor

1 PUHY-80TMU-A, 100TMU-A

BV1	Indoor	Unit			BV2
ST1			TH2	CP2	ST2

			safety valve			Accumulator	SA
		CJ2	High pressure				MA		SLEV
									TH7
									ST7
CJ1	63HS	CP1	SV1		SV2		Comp		LEV1
		O/S	ST6	TH1	CV1			63H	SCC
									TH8
		HEXF							TH5

TH6

HEXB

- 6 -

- 7 -

TB1

L1

Power source	L2
3~208~230V
60Hz	L3

Connect to indoor and remote controller

CH1

SV1

21

S4

SV 2

MF

63H

GR

Ground

CN20

(7P)

DSA

3 CN32

2 (3P)

1

6 CN33

5 (6P)

4

3

2

1

6 CN34

5 (6P)

4 Red

3

2

1

5

4CNFAN1

32(5P)

1Red

3 CN38

2 (3P)

1 Green

Green

Black

White

GL3 L2

13 5

F2

6.3A

X 0 1

X02

X04

X05

Detection

Circuit

MC

Noise filter board

U V W

Red

White

Black

(POWER-BOARD)

IPM

DS(Diode stack)

R 1

FN3

U

V

W

Red

FN1

FN6

Red

P

Gate amp board

+

CNE 1

DCL +

F01

(G/A-BOARD)

Black

52C

FN2

FN4

C 1

Black

N

3.15A

(2P) 2

-

CNDR1

CN15V1

1 2

3 4

Yellow

(9P)

(14P)

Ground

CNDC1 1 2 3

123456789

1234567891011121314

Red

T B 3

T B 7

DCCT

(3P)

A

B

A

B Shield

L1

7

1 2 3 4

F1

6.3A CN40

ZNR1~4

(4P)

1 2 3 4

CN41

(4P)

	1	2	1	2	3
	CNS1			CNS2
	(2P)			(3P)
			Control circuit board
			(MAIN-BOARD)				1
						CNRS3
							2
						(7P)	3
							4
							5
							6
							7
		LD1				CNVCC3	1
							2
						(6P)	3
							4
							5
							6
	OFF ON OFF ON OFF ON OFF ON					CNVCC5 1
	1	1	1		1	(2P)	2
						CNAC3	1
						(5P)	2
							3
							4
							5
	10	10	10		10	CNLV1	1
						(5P)	2
	SW4	SW3	SW2		SW1		3
						Blue
							4
							5
						CNLV2	1
						(5P)	2
							3
			SWU2 SWU1			Red	4
							5

Unit address setting switch

	1	2		3	4	1 2 3	123456789	1234567891011121314
			CNCT CNDC2				CNDR2	CN15V2
52	1		(4P)			(3P)	(9P)	(14P)
C	2			CN52CYellow
	3			(3P)
		1		CNRS2
		2					Power circuit board
		3		(7P)
		4					(INV-BOARD)
		5
		6
		7

1

2 CNVCC2

3 (6P)

4

5

6

1CNVCC4

2(2P)

G	G	1	CNAC2
L3	L3
		2	(5P)
		3
L1	L1	4
		5	F01	X01
			2A
	SLEV

	LEV1	Green	CNL2	Red		Red
		CNTH		CN30V		CNFAN
		(2P)	(2P)	(2P)		(3P)
		1 2	1 2	1 2	1 2	3
5	Trouble
4	Compressor ON/OFF	THHS	L2	R2
3	CN51				MF
2					1
1	(5P)

				12V	3		Compressor ON/OFF
					2		Night mode
Red					1	CN3D
CN03	CN02	CN01	CNH		3	(3P)
(3P)	(8P)	(2P)	(3P)		2		Snow sensor
1 2 3	1 2 3 4 5 6 7 8	1 2	1 2 3		1	CN3S
						(3P)
			Black White	Red		Red	SW3-10 are OFF for Model 80.
			3 2	1			and ON for Model 100.
TH6	TH5TH8TH7TH2	TH1
				63HS

DIAGRAM WIRING ELECTRICAL A-100TMU 80,-PUHY [3]

- 8 -

Symbol

D S

I P M

D C L

D C C T

R 1

R 2

Z N R 1 ~ 4 C 1

5 2 C

M C

Name

Diode stack

Intelligent Power Module

DC reactor

(Power factor improvement)

Current Sensor

Resistor rush current protect

Resistor power regulation

Varistor

Capacitor Smoothing

Magnetic contactor (Inverter main circuit)

Motor Compressor

Symbol

M F

M F 1 D S A C H 1 2 1 S 4

S V 1 , S V 2

6 3 H T H 1

T H 2

T H 5

	Name	Symbol	Name
	Motor Fan Heat exchanger	T H 6	Thermistor OA temp.detect
	Motor Fan Radiator panel	T H 7	liquid outlet temp.
	Surge absorber		detect at Sub-cool coil
	Crankcase heater (Compressor)	T H 8	bypass outlet temp.
	4-way valve		detect at Sub-cool coil
	Solenoid valve	T H H S	Rediator panel temp.detect
	(Discharge-suction bypass)	6 3 H S	High pressure sensor
	High pressure switch	S L E V	Electronic expansion valve
	Thermistor discharge pipe temp.detect		(Oil return)
	saturation	L E V 1	Electronic expansion valve
	evapo.temp.detect		(Sub-cool coil bypass)
	pipe temp.detect	L 2	Choke coil(Transmission)

Symbol

L D 1

S W 1

S W 2 ~4

S W U 1 ~ 2 T B 1

T B 3

T B 7

GR

Nam e

Luminous diode

Switch display selection self-diagnosis Switch function selection

Switch unit address set Terminal block power source Terminal block transmisson Terminal block transmisson centralized control

Ground terminal

<Operation of self-diagnosis switch (SW1) and LED display>

<LED display>

Display

Display at LED lighting (blinking) Remarks SW1 operation

LD1

FLAG1 FLAG2

FLAG3 FLAG4

FLAG5 FLAG6 FLAG7

FLAG8

Relay output

During

Crankcase

21S4

SV1

SV2

Always

FLAG8 always lights at

ON : 1

display

compressor

heater

lighting

OFF : 0

(Lighting)

run

microcomputer power ON

1

2

3

4

5

6

7

8

9

10

0000~9999

FLAG8

Check display

(at factory shipment)

(Blinking)

Display the address and error codes by turns

FLAG7

FLAG6

FLAG5

FLAG4

FLAG3

FLAG2

FLAG1

[4]Standard operation data

1 Cooling operation

	Items	Outdoor units		PUHY-80TMU-A				PUHY-100TMU-A
		Indoor				26.7° C(80° F)/19.4° C(67° F)
	Ambient temp.		DB/WB
							35° C(95° F)
		Outdoor
		Quantity	Set		4				4
	Indoor unit	Quantity in operation			4				4
Condition		Model	–	24	24	20	10	48	16	24	10
		Main pipe			5(16.4)				5(16.4)
	Piping	Branch pipe	m	5(16.4)	5(16.4)	5(16.4)	5(16.4)	5(16.4)	5(16.4)	5(16.4)	5(16.4)
			(Ft)
		Total piping length			25(82)				25(82)
	Indoor unit fan notch		–	Hi	Hi	Hi	Hi	Hi	Hi	Hi	Hi
	Refrigerant volume		kg(oz)		10.2(360)				12.5(441)
Compressor volts/Frequency			V	208		230		208		230
			V/Hz	134/76		134/76		171/98		171/98
Outdoor unit			A	27.4		24.8		35.2		31.8
opening	Indoor unit			440	440	380	300	450	320	440	300
	SC (LEV1)		Pulse		75				81
LEV	Oil return (SLEV)				111				157
Pressure	High pressure/Low pressure		MPa(psi)		2.00/0.50				1.99/0.46
	(after O/S)	(before MA)			(290/72)				(288/67)
		Discharge (TH1)			85(185)				95(203)
		Heat exchanger outlet (TH5)			40(104)				42(108)
		Inlet			7(45)				5(41)
		Accumulator
temperature		Outlet			9(48)				7(45)
	Outdoor	Suction (Comp)			7(45)				10(50)
	unit
		low pressure saturation	° C
					6(43)				4(39)
		temperature (TH2)	(° F)
Sectional
		Shell bottom (Comp)			60(140)				60(140)
		SCC outlet (TH7)			27(81)				27(81)
		Bypass outlet (TH8)			8(46)				6(43)
	Indoor	LEV inlet			26(79)				26(79)
	unit	Heat exchanger outlet			10(50)				10(50)
				- 9 -

2 Heating operation

		Items					Outdoor units
						Indoor
		Ambient temp.							DB/WB
						Outdoor
						Quantity			Set
Condition		Indoor unit				Quantity in operation
						Model			–
						Main pipe
		Piping							m
						Branch pipe
						Total piping length
									–
		Indoor unit fan notch
		Refrigerant volume							kg
									V
Compressor volts/Frequency
									V/Hz
Outdoor unit									A
LEVopening		Indoor unit
									Pulse
		Oil return (SLEV)
		SC (LEV1)
Pressure		High pressure/Low pressure							MPa(psi)
		(after O/S)			(before MA)
					Discharge (TH1)
					Heat exchanger inlet (TH5)
temperature					Suction (Comp)		Inlet		° C
		Outdoor			Accumulator
							Outlet
		unit
Sectional									(° F)
					low pressure saturation
					temperature (TH2)
					Shell bottom (Comp)
		Indoor			Heat exchanger inlet
		unit
					LEV inlet

	PUHY-200TM-A									PUHY-250TM-A
							21.1° C(70° F)
					8.3° C(47° F)/6.1° C(43° F)
	4								4
	4								4
24		24			20		10	48		16		24
													10
	5(16.4)								5(16.4)
5(16.4)		5(16.4)			5(16.4)		5(16.4)	5(16.4)	5(16.4)			5(16.4)	5(16.4)
	25(82)								25(82)
Hi			Hi		Hi		Hi	Hi		Hi		Hi	Hi
	10.2(360)								12.5(441)
208					230			208				230
149/85					149/85			174/100				174/100
27.5					24.9			35.6				32.2
510			510		450		300	350				510
										380			300
	0								0
	87								111
	1.72/0.36								1.72/0.36
	(249/52)								(249/52)
	80								85(185)
	6(46)								8(46)
			–1(30)							–2(28)
			–1(30)							–2(28)
			–1(30)							–2(28)
			–2(28)							–2(28)
	35(95)								44(111)
	71(160)								71(160)
	33(91)								33(91)

- 10 -

[5]Function of dip SW and rotary SW

(1) Outdoor unit

Switch		Function		Function According to Switch Operation		Switch Set Timing
				When Off	When On	When Off		When On
SWU	1~2	Unit Address Setting		Set on 00 or 51~100 with the dial switch. ( 2)		Before power is turned on.
SW1	1~8	For self diagnosis/		LED Monitering Display		During normal operation when
		operation monitoring				power is on.
	9~10		–	–	–	Should be set on OFF.
SW2	1	Centralized Control		Centralized control not	Centralized control	Before power is turned on.
		Switch		connected.	connected.
	2	Deletion of connection		Storing of refrigeration	Deletion of refrigeration	Before power is turned on.
		information.		system connection	system connection
				information.	information.
	3	Deletion of error history.		–	Deletion	During normal operation when
						power is on.
	4	Adjustment of		Ordinary control	Refrigerant volume	During normal		Invalid 2 hours
		Refrigerant Volume			adjustment operation.	operation when		after compressor
						power is on.		starts.
	5		–	–	–		–
	6	Disregard ambient air		Errors valid.	Disregard errors.	During normal operation when
		sensor errors, fluid				power is on.
		overflow errors.
	7	Forced defrosting		Ordinary control	Start forced defrosting.	During normal		10 minutes or
						operation when		more after
						power is on.		compressor
								starts.
	8	Defrost prohibited timer		50 min.	90 min.	During normal operation when
						power is on. (Except during
						defrosting)
	9		–	–	–		–
	10		–	–	–		–
SW3	1	SW3-2 Function Valid/		SW3-2 Function Invalid	SW3-2 Function Valid	During normal operation when
		Invalid				power is on.
	2	Indoor Unit Test		Stop all indoor units.	All indoor units test	When SW3-1 is ON after power is
		Operation			operation ON.	turned on.
	3	Defrosting start		-2° C	0 ° C	During normal operation when
		temperature of TH5.		(28.4° F)	(32° F)	power is on.
	4	Defrosting end		8HP: 12° C(53.6° F)	15° C	During normal operation when
		temperature of TH5.		10HP: 8° C(46.4° F)	(59° F)	power is on. (Except during
		Opening angle of IC		(no operation)	2000	defrosting)
		except when heater
		thermostat is ON during
		defrosting.
	5		–	–	–		–
	6		–	–	–	When switching on the power.
	7	Target Pd (High pressure)		18kg/cm2G	20kg/cm2G	During normal operation when
				(256psi)	(284psi)	power is on.
	8		–	–	–		–
	9		–	–	–		–
	10	Models		Model 80	Model 100	When switching on the power.
SW4	1		–	–	–		–
	2		–	–	–		–
	3		–	–	–		–
	4		–	–	–		–
	5	LED Display		"° F" "psig" Display	"° C" "kgf/cmG "Display	When switching on the power
	6		–	–	–		–
	7		–	–	–		–
	8		–	–	–		–
	9	Fan characteristics		Standard	High external	When switching on the power
		(	)		static pressure
	10		–	–	–		–
1

Note:

1.SWU1~2=00 when shipped from the factory. Other factory settings are indicated by shaded portions.

2.If the address is set from 01 to 50, it automatically becomes 100.

- 11 -

2.SW4-9 setting

Fan characteristics curve:DIPSW4-7OFF[FactorySetting],208V•230V/60Hz Fan characteristics curve:DIPSW4-7ON,208V/60Hz

Fan characteristics curve:DIPSW4-7ON,230V/60Hz

	50
				Continuous operation range
	45
	40						Standard Airflow rate
							200(m3/min)
(Pa)	35
pressure	30
	25
static
	20
External
	15
	10
	5
	0
	150	160	170	180	190	200	210	220	230	240

Airflow rate (m3/min)

- 12 -

(2)Indoor unit DIP SW1, 3

	Switch		SW name	Operation by SW		Switch set timing		Remarks
				OFF	ON	OFF	ON
		1	Room temp. sensor position	Indoor unit inlet	Built in remote controller
		2	Clogged filter detect.	None	Provided
		3	Filter duration	100h	2500h
		4	OA intake	Ineffective	Effective			Always ineffective for PKFY-NAMU
		5	Remote display select.	Fan output display	Thermo. ON signal display
	SW1	6	Humidifier control	At stationary heating	Always at heat.
		7	Heating thermo. OFF airflow	Very low speed	Low speed
		8	Heating thermo. OFF airflow	SW1-7 setting	Set airflow
		9	Power failure automatic	Ineffective	Effective
			return
		10	–	–	–
		1	Model selection	Heat pump	Cool.only	At unit stopping
		2	Cooling capacity saving	None	Provided	(at remote
			Louver for PKFY-NAMU,			controller OFF)
			effective/ineffective
		3	Vane	None	Provided
		4	Vane swing function	None	Provided			Not provided for PKFY-NAMU
								Provided for PLFY-NGMU (ON) setting
	SW3	5	Vane horizontal angle	1st setting	2nd setting
		6	Vane angle set for cooling	Down blow B, C	Horizontal			Always down blow B,C for
								PKFY-NAMU
		7	–	–	–
		8	Heating 4deg (7.2 deg) up	Effective	Ineffective
			Note : ° C scale (° F scale)
		9	–	–	–
		10	–	–	–

Note 1: The shaded part indicates the setting at factory shipment. (For the SW not being shaded, refer to the table below.)

2:The DipSW setting is only effective during unit stopping (remote controller OFF) for SW1, 2, 3 and 4 commonly and the power source is not required to reset.)

3:When both SW1-7 and SW1-8 are being set to ON, the fan stops at the heating thermostat of OFF.

	Model		PLFY-NAMU-A	PDFY-NMU-A		PKFY
Switch					NAMU-A		NGMU-A
		3	ON	ON		OFF
SW1		6	ON	ON		OFF
		7	OFF	OFF		OFF
		3	ON	OFF		ON
SW3		4	ON	OFF	OFF		ON
		6	OFF	OFF		OFF
		8	OFF	OFF		OFF

Setting of DIP SW2

Model		08			10								12							16			20		24
Capacity (model name) code		4			5								6							8			10		13
SW2 setting	ON				ON								ON						ON			ON			ON
	OFF				OFF								OFF						OFF			OFF			OFF
Model		32			40								48
Capacity (model name) code		16			20								25
SW2 setting	ON				ON								ON
	OFF				OFF								OFF

- 13 -

Setting of DIP SW4

Setting of DIP SW5

Model

Circuit board used

SW4

1

2

3

4

PDFY-10 ~ 32

ON

OFF

ON

OFF

PLFY-12 ~ 24

Phase control

OFF

OFF

OFF

ON

PLFY-32 ~ 48

ON

OFF

OFF

ON

PKFY-P-8

OFF

OFF

ON

ON

PKFY-P-12

–

–

–

–

PDFY-40, 48

Relay selection

OFF

OFF

ON

–

- 14 -

2TEST RUN

[1]Before Test Run

(1) Check points before test run

1 Neither refrigerant leak nor loose power source/ transmission lines should be found, if found correct immediately.

2 Confirm that the resistance between the power source terminal block and the ground exceeds 2MΩ by measuring it with a DC500V megger. Do not run if it is lower than 2MΩ .

Note : Never apply the megger to the MAIN board. If applied, the MAIN board will be broken.

3Confirm that the Ball valve at both gas and liquid sides are fully opened. Note : Close the cap.

4Be sure that the crankcase heater has been powered by turning the main power source on at least 12 hours before starting the test run. The shorter powering time causes compressor trouble.

(2)Caution at inverter check

Because the inverter power portion in outdoor unit electrical part box have a lot of high voltage portion, be sure to follow the instructions shown below.

During energizing power source, never touch inverter power portion because high voltage (approx. 320V) is

1applied to inverter power portion.

When checking,

1Shut off main power source, and check it with tester, etc.

2Allow 10 minutes after shutting off main power source.

3Open the MAIN board mounting panel, and check whether voltage of both ends of electrolytic capacitor is 20V or less.

- 15 -

(3) Check points for test run when mounting options

Built-in optional parts		Content of test run	Check point	Result
Mounting of drain	1	Release connector of pump circuit,	Local remote controller displays code
water pump		check error detection by pouring	No. “2503”, and the mechanism stops.
mechanism		water into drain pan water inlet.
			No overflow from drain pan.
	2	After that, connect connector of	Drain water comes out by operation of
		circuit.	drain pump.
	3	Check pump operations and drain-	Sound of pump operations is heard, and
		age status in cooling (test run) mode.	drain water comes out.
Mounting of perme-	Check humidifier operations and water		No water leak from connecting portions
able film humidifier	supply status in heating (test run) mode.		of each water piping.
			Water is supplied to water supply tank,
			and float switch is operating.

(4) Attention for mounting drain water pump mechanism

Work		Content of test run		Check point	Result
Disassembling and	1	Lead wire from control box not
assembling of drain		damaged.
water pump
mechanism	2	Rubber cap properly inserted in to		pipe
		drain water outlet of drain pan?
	3	Insulation pipe of gas and liquid
		pipes dealt with as shown on next
		page?
	4	Drain pan and piping cover mounted
		without gap?
	5	Drain pan hooked on cut projection
		of the mechanism?
Mounting of float	Float switch installed without contacting the		1 Float switch moves smoothly.
switch	drain pan?
			2	Float switch is mounted on
				mounting board straight without
				deformation.
			3 Float switch does not contact the
				copper pipe.
Electric wiring	1	No mistakes in wiring?	Wiring procedure is exactly followed.
	2	Connectors connected securely and	Connector portion is tightly hooked.
		tightly?
	3	No tension on lead wire when sliding
		control box?

- 16 -

(5)Check points for system structure

Check points from installation work to test run.

Classification Portion		Check item	Trouble
Installation and		Instruction for selecting combination of outdoor unit,
piping	1	and indoor unit followed? (Maximum number of indoor	Not operate.
		units which can be connected, connecting model name,
		and total capacity.)
	2	Follow limitation of refrigerant piping length? For example,
		70m (229ft) or less (total length : 220m (721ft)) at the farthest.	Not cool (at cooling).
	3	Connecting piping size of branch piping correct?	Not heat (at heating).
	4	Refrigerant piping diameter correct?
	5	Refrigerant leak generated at connection?	Not cool, not heat, error stop.
	6	Insulation work for piping properly done?	Condensation drip in piping.
	7	Specified amount of refrigerant replenished?	Not cool, not heat, error stop.

8Pitch and insulation work for drain piping properly done? Water leak, condensation drip in drain piping.

	Power source	1	Specified switch capacity and wiring diameter of main	Error stop, not operate.
	wiring		power source used?
		2	Proper grounding work done on outdoor unit?	Electric shock.
		3	The phases of the L line (L1, L2, L3) correct?	Error stop, not operate.

- 17 -

	DRY COOL	CENTRALLY CONTROLLED			SENSOR	DRY COOL	CENTRALLY CONTROLLED			SENSOR
	AUTO FAN	DAILY TIMER	AUTO AUTO	FAN	INSIDE	AUTO FAN	DAILY TIMER	AUTO AUTO	FAN	INSIDE
		CLOCK ON OFF			FILTER		CLOCK ON OFF			FILTER
				SPEED					SPEED
	HEAT	CHECK SET TEMP.	REMAINDER			HEAT	CHECK SET TEMP.	REMAINDER

STAND BY	VENTILATION	TEST RUN	STAND BY	VENTILATION	TEST RUN
DEFROST	EROR CODE NOT AVAILABLE		DEFROST	EROR CODE NOT AVAILABLE
SET TEMP.		ON/OFF	SET TEMP.		ON/OFF

1	2	3	MODE	TIMER	CLOCK ON OFF FAN SPEED	AIR DIRECTION FILTER	MODE	TIMER	CLOCK ON OFF FAN SPEED	AIR DIRECTION FILTER
					LOUVER	VENTILATION CHECK TEST			LOUVER	VENTILATION CHECK TEST
			PAR-F27MEA-US	TIMER SET			PAR-F27MEA-US	TIMER SET

Classification	Portion	Check item	Trouble
Transmission	1	Limitation of transmission line length followed? For example,	Erroneous operation, error stop.
line		200m (656ft) or less (total length : 500m (1640ft)) at the farthest.
	2	1.25mm2 (AWG16) or more transmission line used?	Erroneous operation, error stop.
		(Remote controller 10m (32ft) or less 1.25mm2 (AWG16))
	3	2-core cable used for transmission line?	Error stop in case multiple-core
			cable is used.
	4	Transmission line apart from power source line by 5cm (2in) or more?	Erroneous operation, error stop.
	5	One refrigerant system per transmission line?	Not operate.
	6	The short circuit connector is changed form CN41 to	Not operate.
		CN40 on the MAIN board when the system is centralized
		control? (Just one outdoor unit. Not all outdoor units.)
	7	• No connection trouble in transmission line?	Error stop or not operate.
	8	Connection of wrong remote controller line terminals?	Never finish the initial mode.
		• MA Remote controller : TB15
		• M-NET Remote controller : TB5
System set	1	Address setting properly done? (M-NET Remote	Error stop or not operate.
		controller, indoor unit and outdoor unit.)
	2	Setting of address No. done when shutting off power	Can not be properly set with power
		source?	source turned on.
	3	Address numbers not duplicated?	Not operate.
	4	Turned on SW3-8 on indoor unit circuit board when	Set temperature not obtained at
		mounting room thermistor sensor?	heating operations (Thermostat
			stop is difficult)
Before starting	1	Refrigerant piping ball valve (Liquid pressure pipe, gas	Error stop.
		pressure pipe) opened?

2Turn on power source 12 hours before starting operations? Error stop, compressor trouble.

-18 -

AIR DIRECTION

FAN SPEED

[2]	Test Run Method
			Operation procedure
1	Turn on universal power supply at least 12 hours before starting → Displaying “HO” on display panel for about two
	minutes
2	Press	TEST	button twice → Displaying “TEST RUN’’ on display panel
3	Press	MODE	button → Make sure that air is blowing out
	Press	MODE	button to change from cooling to heating operation, and vice versa Make sure that warm or cold

4air is blowing out

5 Press	FAN SPEED adjust button →	Make sure that air blow is changed
Press	AIR DIRECTION or LOUVER	button to change direction of air blowing make sure that horizontal or

6downward blow is adjustable.

7Make sure that indoor unit fans operate normally

8Make sure that interlocking devices such as ventilator operate normally if any

9 Press ON/OFF button to cancel test run → Stop operation

Note 1: If check code is displayed on remote controller or remote controller does not operate normally.

2:Test run automatically stops operating after two hours by activation of timer set to two hours.

3:During test run, test run remaining time is displayed on time display section.

4:During test run, temperature of liquid pipe in indoor unit is displayed on remote controller room temperature display section.

5: When pressing adjust button, depending on the model, “NOT AVAILABLE” may be displayed on remote controller. However, it is not a malfunction.

6: When pressing or LOUVER button, depending on the model, “NOT AVAILABLE” may be displayed on remote controller. However, it is not a malfunction.

- 19 -

3GROUPING REGISTRATION OF INDOOR UNITS WITH M-NET REMOTE CONTROLLER

(1)Switch function

• The switch operation to register with the remote controller is shown below:

i

ii

	DRY COOL	CENTRALLY CONTROLLED				SENSOR
	AUTO FAN	DAILY TIMER	AUTO AUTO		FAN	INSIDE
		CLOCK ON		OFF
					SPEED	FILTER
	HEAT	CHECK SET TEMP.	REMAINDER

		STAND BY		EROR CODE	VENTILATION	TEST RUN
	C Switch to assign	DEFROST			NOT AVAILABLE
	indoor unit address		SET TEMP.			ON/OFF
	F Delete switch						A Registration/
	G Registered mode	MODE	TIMER	CLOCK ON OFF FAN SPEED AIR DIRECTION FILTER			ordinary mode
							selector switch

selector switch

E Confirmation switch

LOUVER

VENTILATION CHECK TEST

DRegistration switch

PAR-F27MEA-US

TIMER SET

B Registration/ ordinary mode selector switch

HSwitch to assign interlocked unit address

Name	Symbol		Name of actual switch	Description
	of switch
Registration/ordinary	A +	B	FILTER + LOUVER	This switch selects the ordinary mode or registered mode (ordinary
mode selection switch				mode represents that to operate indoor units).
				To select the registered mode, press the	FILTER + LOUVER
				button continuously for over 2 seconds under stopping state.
				[Note] The registered mode can not be obtained for a while after
				powering.
				Pressing the FILTER + LOUVER button displays “CENTRALLY
				CONTROLLED”.
Switch to assign indoor	C		of TEMP	This button assigns the unit address for “INDOOR UNIT ADDRESS
unit address				NO.”
Registration switch	D		TEST RUN	This button is used for group/interlocked registration.
Confirmation switch	E		TIMER	This button is used to retrieve/identify the content of group and
				interlocked (connection information) registered.
Delete switch	F		CLOCK→	This button is used to retrieve/identify the content of group and
			ON→ OFF	interlocked (connection information) registered.
Registered mode	G			This button selects the case to register indoor units as group (group
selector switch				setting mode) or that as interlocked (interlocked setting mode).
			MODE
				The unit address is shown at one spot	for the group setting mode
				while at two spots for the interlocked setting mode.
Switch to assign	H		of TIMER SET	This button assigns the unit address of “OA UNIT ADDRESS NO.”
interlocked unit address

- 20 -

(2) Attribute display of unit

•At the group registration and the confirmation/deletion of registration/connection information, the type (attribute) of the unit is displayed with two English characters.

Display

Type (Attribute) of unit/controller

Indoor unit connectable to remote controller

Outdoor unit

Local remote controller

System controller (MJ)

[Description of registration/deletion/retrieval]

•The items of operation to be performed by the remote controller are given below. Please see the relating paragraph for detail.

1Group registration of indoor unit

•The group of the indoor units and operating remote controller is registered.

•It is usually used for the group operation of indoor units with different refrigerant system.

2Retrieval/identification of group registration information of indoor units

•The address of the registered indoor units in group is retrieved (identified).

3Retrieval/identification of registration information

•The connection information of any unit (indoor/outdoor units, remote controller or the like) is retrieved (identified).

4Deletion of group registration information of indoor units

•The registration of the indoor units under group registration is released (deleted).

5Deletion of the address not existing

•This operation is to be conducted when “6607” error (No ACK error) is displayed on the remote controller caused by the miss setting at test run, or due to the old memory remained at the alteration/modification of the group composition.

Caution:

When MELANS (G-50 for example) is being connected, do not conduct the group/pair registration using

the remote controller. The group/pair registration should be conducted by MELANS. (For detail, refer to the instruction exclusively prepared for MELANS.)

- 21 -

(3) Group registration of indoor unit

1)Registration method

•Group registration of indoor unit ........................................................................ 1

The indoor unit to be controlled by a remote controller is registered on the remote controller.

[Registration procedure]

1 With the remote controller under stopping or at the display of “HO”, continuously press the FILTER + LOUVER button ( A + B) at the same time for 2 seconds to change to the registration mode. (See the figure below.)

2Assign the indoor unit address to “INDOOR UNIT ADDRESS NO.” by operating the (Room temperature adjustment) ( C).

Then press the TEST RUN button (D) to register. In the figure below, the “INDOOR UNIT ADDRESS NO.” is being set to 001.

3 After completing the registration, press the

FILTER + LOUVER button ( A+ B) at the same time for 2 seconds to

change to the original ordinary mode (with the remote controller under stopping).

Ordinary mode

• Remote controller under stopping

• “HO” under displaying

˚C

˚C

INDOOR UNIT

ERROR CODE

INDOOR UNIT

ERROR CODE

ADDRESS NO

OAUNITADDRESSNO

ADDRESS NO

OAUNITADDRESSNO

11

Group setting mode

˚C

ERROR CODE

OAUNITADDRESSNO

• Registration complete

˚C

ERROR CODE

OAUNITADDRESSNO

Indicates the type of unit (Indoor unit in this case)

2 + 3

• Registration error

˚C

ERROR CODE

OAUNITADDRESSNO

“88” flickers indicating registration error. (when the indoor unit registered is not existing)

2 Assign the	1 Change to the	3Press the	•
address (C)	registration	registration	•
	mode ( A+ B)	switch (D)
System example
	Indoor units
	Group
Remote controller
		- 22 -

Confirm the indoor unit address No.

Confirm the connection of the transmission line.

2)Method of retrieval/confirmation

•Retrieval/confirmation of group registration information on indoor unit............... 2

The address of the indoor unit being registered on the remote controller is displayed.

[Operation procedure]

1With the remote controller under stopping or at the display of “HO”, continuously press the FILTER + LOUVER button (A+ B) at the same time for 2 seconds to change to the registration mode.

2In order to confirm the indoor unit address already registered, press TIMER button (E). (See figure below.) When the group of plural sets is registered, the addresses will be displayed in order at each pressing of TIMER button (E).

3After completing the registration, continuously press the FILTER + LOUVER button ( A+ B) at the same time for 2 seconds to change to the original ordinary mode (with the remote controller under stopping).

• Registered

	SET TEMP.		ON/OFF
MODE	TIMER	CLOCK ON OFF FAN SPEED	AIR DIRECTION FILTER
		LOUVER	VENTILATION CHECK TEST
PAR-F27MEA-US	TIMER SET

			˚C
					ERROR CODE
					OAUNITADDRESSNO
1	Indicates the type of unit
	(Indoor unit in this case)

• No registration.

˚C

ERROR CODE

OAUNITADDRESSNO

1Press the switch for confirmation (E)

Note: Only one address will be displayed when the registration is one even the switch is how often pressed

•Retrieval/confirmation of registration information ................................................ 3

The registered information on a certain unit (indoor unit, outdoor unit, remote controller or the like) is displayed.

[Operation procedure]
1 With the remote controller under stopping or at the display of “HO”, continuously press the	FILTER + LOUVER button
(A + B) at the same time for 2 seconds to change to the registration mode.
2 Operate MODE button (G) for the interlocked setting mode. (See figure below.)
3 Assign the unit address of which registration information is desired to confirm with the	(TIMER SET) switch

(H). Then press the TIMER button (E) to display it on the remote controller. (See figure below.) Each pressing of TIMER button (E) changes the display of registered content. (See figure below.)

4 After completing the retrieval/confirmation, continuously press the FILTER + LOUVER button (A + B) at the same time for 2 seconds to change to the original ordinary mode (with the remote controller under stopping).

- 23 -

			• Registered
			ß C
			(Alternative
				display)
			ß C
	SET TEMP.		ON/OFF
MODE	TIMER CLOCK	ON OFF FAN SPEED	AIR DIRECTION FILTER
		LOUVER	VENTILATION CHECK TEST
PAR-F27MEA-US	TIMER SET			2
			ß C
			1 + 2
			(Alternative
				display)
2 Press the switch for		1Set the address
confirmation (E)			ß C
			˚C
			INDOOR UNIT	ERROR CODE
			ADDRESS NO	OAUNITADDRESSNO

* Same display will appear when

the unit of “007” is not existing.

• No registration

˚C

ERROR CODE

OAUNITADDRESSNO

3)Method of deletion

• Deletion of group registration information of indoor unit ...................................... 4

[Operation procedure]

1With the remote controller under stopping or at the display of “HO”, continuously press the FILTER + LOUVER button ( A + B) at the same time for 2 seconds to change to the registration mode.

2 Press the TIMER button (E) to display the indoor unit address registered. (As same as 2)

3 In order to delete the registered indoor unit being displayed on the remote controller, press the TIMER CLOCK → ON→ OFF (F) button two times continuously. At completion of the deletion, the attribute display section will be shown as “– – “. (See figure below.)

Note: Completing the deletion of all indoor units registered on the remote controller returns to “HO” display.

4 After completing the registration, continuously press the FILTER + LOUVER button ( A+ B) at the same time for 2 seconds to change to the original ordinary mode (with the remote controller under stopping).

• Deletion completed

	SET TEMP.		ON/OFF
MODE	TIMER	CLOCK ON OFF FAN SPEED	AIR DIRECTION FILTER

1

		˚C
In case of group re-	INDOOR UNIT			ERROR CODE
	ADDRESS NO			OAUNITADDRESSNO
gistration with other	“–” indicates the
indoor unit is existing	deletion completed.

• Deletion completed

1

LOUVER

VENTILATION CHECK TEST

PAR-F27MEA-US

TIMER SET

1Press the switch for confirmation ( E ) twice continuously.

In case of no group registration with other indoor unit is existing

˚C
INDOOR UNIT	ERROR CODE
ADDRESS NO	OAUNITADDRESSNO

- 24 -

4)Deletion of information on address not existing

•Deletion of information on address not existing ................................................... 5

This operation is to be conducted when “6607” error (No ACK error) is displayed on the remote controller caused by the miss setting at test run, or due to the old memory remained at the alteration/modification of group composition, and the address not existing will be deleted.

Note: The connection information (connection between indoor unit and outdoor unit) on the refrigerant system can not be deleted.

An example to delete the system controller of “250” from the indoor unit of “007” is shown below.

[Operation procedure]

1With the remote controller under stopping or at the display of “HO”, continuously press the FILTER + LOUVER button (A+ B) at the same time for 2 seconds to change to the registration mode.

2Operate MODE button (G) for the interlocked setting mode ( ii ). (See the figure below.)

3Assign the unit address existing to “OA UNIT ADDRESS No.” with the (TIMER SET) switch (H), and press TIMER button (E) to call the address to be deleted. (See the figure below.) As the error display on the remote controller is usually transmitted from the indoor unit, “OA UNIT ADDRESS No.” is used as the address of the indoor unit.

4Press the TIMER CLOCK → ON→ OFF button (F) twice. (See the figure below.)

5After completing the deletion, continuously press the FILTER + LOUVER button ( A+ B) at the same time for 2 seconds to return to the original ordinary mode (with the remote controller under stopping).

• Deletion completed

				When both indoor
				unit and interlocked
		ß C		unit addresses are	ß C	ERROR CODE
	INDOOR UNIT		ERROR CODE	existing	INDOOR UNIT
					ADDRESS NO	OAUNITADDRESSNO
	ADDRESS NO		OAUNITADDRESSNO
		(Alternative			(Alternative
						display)
			display)	3
		ß C			ß C
				3	INDOOR UNIT	ERROR CODE
	INDOOR UNIT		ERROR CODE
					ADDRESS NO	OAUNITADDRESSNO
	ADDRESS NO		OAUNITADDRESSNO
			1+ 2
					• Deletion completed
					ß C
					INDOOR UNIT	ERROR CODE
					ADDRESS NO	OAUNITADDRESSNO
				Deletion of	(Alternative
				address not		display)
				existing
		SET TEMP.		ON/OFF	ß C
					INDOOR UNIT	ERROR CODE
					ADDRESS NO	OAUNITADDRESSNO
	MODE	TIMER CLOCK ON OFF FAN SPEED		AIR DIRECTION FILTER
			LOUVER	VENTILATION CHECK TEST
	PAR-F27MEA-US		TIMER SET

2Press the switch for	3Press the deletion switch (F) twice
confirmation (E)	1 Set the address (H)

- 25 -

4 CONTROL

[1]Control of Outdoor Unit

(1)Initial processing

•When turning on power source, initial processing of microcomputer is given top priority.

•During initial processing, control processing corresponding to operation signal is suspended. The control processing is resumed after initial processing is completed. (Initial processing : Data processing in microcomputer and initial setting of each LEV opening, requiring approx. 2 minutes at the maximum.)

(2)Control at staring

•In case unit is started within 2 hours after turning on power source at low outdoor air temperature (+5˚C (41 ° F) or

less), the unit does not start operating for 30 minutes at the maximum

.

(3)Bypass, capacity control

•Solenoid valve consists of bypass solenoid valve (SV1, SV2) bypassing between high pressure side and low pressure side. The following operation will be provided.

1)Bypass solenoid valves SV1 and SV2 (both "open" when turned on)

Item

SV1

SV2

ON (Open)

OFF (Close)

ON (Open)

OFF (Close)

When starting compressor

Turned on for 4 minutes

After thermost "ON is returned

Turned on for 2 minutes

and after 3 minutes restart

When compressor stops in

Always turned on

cooling or heating mode

After operation stops

Turned on for 3 minutes

During defrosting operations

Always turned on

(See figure below 1)

During oil recovery operations

Always turned on in oil recovery

operation after low frequency

continuous operations

During 20Hz operations, at fall

When low pressure

When low pressure

in low pressure saturation

saturation temp. (ET)

saturation temp.

temperature. (ET) (3 minutes or

is -30˚C (-22° F) or less

(ET) is -15˚C (5° F) or

more after starting)

more

When high pressure rises (Pd)

When Pd reaches

When Pd is

When Pd reaches

When Pd is 23kg/

27.5kg/cm2G

24kg/cm2G (341psi) or

26kg/cm2G (370psi)

cm2G (327psi) or less

(391psi) or more

less 30 seconds

or more

after 30 seconds

When high pressure rises (Pd)

Turned on when high

When high pressure

during 20Hz operations

pressure (Pd) ex-

(Pd) is 20kg/cm2G

(3 minutes after starting)

ceeds pressure limit

(284psi) or less

When discharge temperature

When temp. exceeds

When discharge

rises

130˚C (266° F) and Pd reaches

temp. is 115˚C

(3 minutes after starting)

15kg/cm2G (213psi) or more

(239° F) or less

Ex. SV1

Compressor

Bypass

solenoid

valve

Thermo.

Thermo.

Start

Stop

Defrost-

(SV1)

OFF

ON

ing time

(*1)

(4-minute)

(4-minute)

(2-minute)

(3-minute)

- 26 -