Mitsubishi Electric Fresh Master GUF-50RD4 Manual de usuario

Repair work must be performed by

the manufacturer, its service agent or

a similarly qualified person in order to

avoid hazards.

June 2014 No. U189-A

Model : GUF-50RD4

GUF-50RDH4

GUF-100RD4

GUF-100RDH4

GUF-100RDH4-60

FRESH MASTER

HANDBOOK

Nameplate

Contents

1. Safety precautions

.................................................................... 3-4

2. Names and functions of components .......................................... 4

3. Specifications

.............................................................................. 5

4. Outside dimensions

..................................................................... 6

5. Electrical wiring diagrams ......................................................... 7-8

6. Circuit board diagrams ........................................................... 9-10

7. Troubleshooting

.....................................................................11-17

8. Overhauling procedures ........................................................ 18-28

9. Parts catalog ........................................................................ 29-63

GUF-50RD4................................................................... 30-35

GUF-50RDH4................................................................. 36-41

GUF-100RD4................................................................. 42-47

GUF-100RDH4............................................................... 48-55

GUF-100RDH4-60 .......................................................... 56-63

─3 ─

1. Safety precautions

Warning

Modification is prohibited

Do not modify the unit.

(Failure to heed this warning may result

in electric shock, fire and/or injury.)

Electric shock

If you must inspect the circuitry while the power is

on, do not touch the live parts.

(Failure to heed this warning may result

in electric shock.)

Check insulation

Upon completing repair work, always measure the

insulation resistance. Verify that it is at least 10 MΩ

(with a 500 V DC insulation resistance tester), and

then turn on the power.

(Inadequate insulation may result in

electric shock.)

Incorrect handling of the product may

result in serious injury or death.

Do not mix anything other than the specified

coolant of the same type used in the outdoor

unit.

Do not charge any coolant different from the coolant

used in the outdoor unit.

(

Failure to heed this warning may cause

the pressure inside the freezing cycle

to become abnormally high, leading to

injury or other damage.

)

Use proper parts and tools

For repair, be sure to use the parts listed in the

service parts list of the applicable model and use the

proper tools.

(Failure to heed this warning may result in

electric shock, fire and/or injury.)

Caution against

electric shock

Prohibited

Turn off the power supply

Be sure to shut off the power supply isolator before dis-

assembling the unit for repair.

(Failure to heed this warning may result

in electric shock.)

Be sure to follow

this instruction.

Be sure to follow

this instruction.

Be sure to follow

this instruction.

Read the following precautions thoroughly before the maintenance, and then inspect and repair the product in a

safe manner.

The types and levels of danger that may arise if the product is handled incorrectly are described with the warning

symbols shown below.

Toxic gas generation

• Be careful that the coolant (R407C, R410A) does

not leak in a flammable environment.

• Conduct welding operation in an open room.

• If the coolant gas leaks, open the windows while

servicing.

• Be sure to completely repair the leak. Close the

service valve if the repair work is temporarily sus-

pended.

(

If the coolant gas comes into contact

with flames such as open fire, sparks

and a heater, it may generate toxic gas.

)

Be sure to follow

this instruction.

Prohibited

Proper electric work

Use the electric wires designated for electric work, and

conduct electric work in accordance with the "Electric

Installation Engineering Standard", the "Indoor Wiring

Regulations", and the Installation Instructions.

(Improper connection or wiring installation

may result in electric shock and/or fire.)

Be sure to follow

this instruction.

Replace damaged and/or degraded parts

Be sure to replace the power-supply cord and lead

wires if they are damaged and/or degraded.

(Failure to heed this warning may result in

electric shock and/or fire.)

Be sure to follow

this instruction.

─4 ─

Make sure that the product operates properly upon completing repair work. Clean the product and the surround-

ing area, and then notify the customer of the completion of repair.

Request for repair

Inspect the earth condition, and repair it if it is incomplete. Make sure that an earth leakage breaker or an

overload protection device is installed. If it is not installed, recommend the dealer to install one.

Caution Incorrect handling of the product may result in injury or

damage to properties including buildings and equipment.

Caution for injury

Do not work at a location where you do not have a

sure footing.

(Failure to heed this caution may result in

a fall.)

Wear gloves

Wear gloves when servicing.

(Failure to heed this caution may result in

injury to your hands from sharp metal or

other edges.)

Be sure to follow

this instruction.

Prohibited

Prevent water leakage

• Before removing any of the water-related parts,

completely drain the residual water from the piping.

• Upon completing repair work, be sure to check the

drainage of the indoor unit and that no water leaks

from any of the piping connections.

(Water leakage may cause buildings to

soil, leading to secondary failure of other

parts.)

Be sure to follow

this instruction.

2. Names and functions of components

Lossnay core

Temperature and humidity

are exchanged between

supply air and exhaust air.

High efficiency filters (Optional parts)

Removes dust from the outside air.

Damper plate

Switches between the Lossnay

ventilation and normal ventilation.

Air filter

Prevents clogs in the Lossnay core

*The illustration shows GUF-50RDH4.

Control box

Maintenance cover

Ceiling suspension fixture

Exhaust fan

Fan used to expel dirty air to outside of the room

Direct expansion coil

Heats or cools the air supply after heat exchange.

Electronic expansion valve

Maintenance cover (for humidifying)

Permeable-film humidifier

Performs clean humidifying of the air supply

after heat exchange.

Not available on GUF-50/100RD4types

Discharge valve

Drain discharge hole

Service valve

Strainer (O-ring installed)

Air supply fan

Fan to supply outside air to the inside

Water supply tube

Supplies water to the permeable-film humidifier.

Duct connection flange

─5 ─

3. Specifications

• The values given in the table for the noise level reflect the levels measured at a position 1.5 meters immediately

below the unit in an anechoic chamber.

• The noise at the air outlets (at a 45° angle, 1.5 meters in front) is about 5-6 dB (A) higher than the values given in

the table.

• The above values apply during Lossnay ventilation when the fan speed is set to high speed.

* Capability in ( ) is heat recovery capability by the Lossnay cores.

Cooling/Heating capability indicates the maximum value at operation under the following condition.

Cooling: Indoor: 27°C DB/19°C WB Outdoor: 35°C DB/24°C WB

Heating: Indoor: 20°C DB/13.8°C WB Outdoor: 7°C DB/6°C WB

• Mitsubishi Electric measures products according to Japan Industrial Standard (JIS B 8628).

• In the United Kingdom, on-site measurements by pitot tube method could be as much 20% different from JIS test

room conditions. If the measuring point is close to sources of turbulence like bends, contractions and dampers,

etc., it is difficult to measure the air volume correctly. A straight duct length more than 10D (D=duct diameter) from

the source of turbulence is recommended for correct measurement. On-site measurement should therefore be

carried out in accordance with BSRIA guideline (Commissioning Air Systems. Application procedures for buildings

AG3/89.3 (2001)).

Model name

Power

supply

(V)

Frequency

(Hz)

Current

(A)

Power con-

sumption

(W)

Air volume

External air load heat

processing capability (kw)

Humidifying

volume

Noise

(dB)

Weight

(kg)

Equivalent

indoor unit

capability

m3/h L/S Cooling

capability

Heating

capability

GUF-50RD4

Single-

phase

220-240

1.15 235-265 500 139 5.57

(1.94)

6.21

(2.04) -

33.5-34.5

54 P32

GUF-50RDH41.15 235-265 500 139 5.57

(1.94)

6.21

(2.04) 2.70

33.5-34.5

57 P32

GUF-100RD42.20 480-505

1,000

278 11.44

(4.12)

12.56

(4.26) - 38-39 92 P63

GUF-100RDH42.20 480-505

1,000

278 11.44

(4.12)

12.56

(4.26) 5.40 38-39 98 P63

GUF-100RDH4-60

Single-

phase

220

60 3.20 685

1,000

278 11.44

(4.12)

12.56

(4.26) 5.40 40.5 98 P63

─6 ─

4. Outside dimensions

GUF-50RD4, GUF-50RDH4, GUF-100RD4, GUF-100RDH4, GUF-100RDH4-60

100

øH

øJ

(N)

79 79

150 to 250

Air exhaust fan

Damper plate

Air supply fan

Ceiling suspension fixture

(4×13×30 length hole for GUF-50 types)

(4×15×30 length hole for GUF-100 types)

(Return air)

Control box

Maintenance cover

(Exhaust air)

Gas pipe

Drain discharge hole

(VP25 connection)

Lossnay core

Liquid pipe

Heat exchanger

Air filters

(Supply air)

(Outdoor air)

Ceiling suspension fixture

Maintenance cover

Location at which the duct direction can be changed

Lossnay core

Air filter

High efficiency filter

Fan

Maintenance space

Inspection

opening

Inspection

opening

Solenoid valve unit with

pressure regulator*

Solenoid valve

Heat exchange unit

Humidifying element

Maintenance space

Power cable

installation port

Upper location at which the ceiling

suspension fixture can be installed

(for GUF-100 types)

Location at which the duct direction

can be changed

Humidifying element*

S (Water intake)

(Discharge hole)

Water intake strainer

with check valve*

(PT1/2 External thread)

More than 600

(The components marked with * are available for GUF-50/100RDH4types only)

High efficiency filter

(Optional part)

Model

External

dimension

Ceiling suspen-

sion ﬁxture pitch

Duct connection ﬂange Duct pitch Humidiﬁcation

Inspection

opening

Weight

(kg)

ABCDEF

Nominal

diameter

GH J K LMNPQRS T

GUF-50RD4

1288 1016

317 1185

1048

22 200

158.5

192 208 745

372.5

435 124 347 135 99 266 450 54

GUF-50RDH457

GUF-100RD4

1580 1231

398

1465 1271

16 250 199 242 258 920 460 670 149 361 169 110 280 600

GUF-100RDH4

GUF-100RDH4-60 98

Unit (mm)

─7 ─

5. Electrical wiring diagrams

GUF-50RD4, GUF-100RD4

─8 ─

GUF-50RDH4, GUF-100RDH4, GUF-100RDH4-60

GUF-50RDH4, GUF-100RDH4220-240 V 50

GUF-100RDH4-60 220 V 60

─9 ─

6. Circuit board diagrams

Circuit board diagrams and check points <FU-M05-D4>

1GUF-50RD4, GUF-50RDH4, GUF-100RD4, GUF-100RDH4

LEV

Power supply

220-240 V AC 50 Hz

14 V DC

12 V DC

5 V DC

GND

External humidifier

control input

Operation monitor output

ZKHQVWRSSHG

GXULQJRSHUDWLRQ

MA remote controller

transmission cable

M-NET

transmission cable

M-NET

transmission cable

6KLHOGHGSDUW

Error monitor output

QRUPDOO\



when there is an error



Supply fan

&RPPRQ

Fuse

$9 7UDQVIRUPHUSULPDU\LQSXW

7UDQVIRUPHUVHFRQGDU\RXWSXW

16 to 23 V AC

KLJK

low

OA thermistor

Damper motor

220-240 V AC 50 Hz

Limit switch

RA thermistor

Gas pipe thermistor

Water sensor

Liquid pipe thermistor

LED3

On when M-NET line

power is on.

LED1

On when power is on.

Exhaust fan

&RPPRQ

Supply fan

220-240 V AC

50 Hz

KLJK

low

Exhaust fan

220-240 V AC

50 Hz

Solenoid value

Full-wave rectified YROWDJH

of 220-240 V AC 50 Hz

(GUF-50/100RDH4W\SHV

LED2

On when MA remote

controller power is on.

Address switch

7HQVGLJLW

Address switch

2QHVGLJLW

Branch No. switch

Function switch 3

Function switch 2

Function switch 1

─10 ─

2GUF-100RDH4-60

LEV

14 V DC

12 V DC

5 V DC

GND

External humidifier

control input

MA remote controller

transmission cable

M-NET

transmission cable

M-NET

transmission cable

(Shielded part)

Supply fan

(Common)

Fuse

(6.3 A/250 V)

OA thermistor

Limit switch

RA thermistor

Gas pipe thermistor

Water sensor

Liquid pipe thermistor

LED3

On when M-NET line

power is on.

LED1

On when power is on.

Exhaust fan

(Common)

LED2

On when MA remote

controller power is on.

Address switch

(Tens digit)

Address switch

(Ones digit)

Branch No. switch

Operation monitor output

ZKHQVWRSSHG

GXULQJRSHUDWLRQ

Error monitor output

QRUPDOO\



when there is an error

)

Function switch 3

Function switch 2

Function switch 1

high

low

high

low

Transformer primary (input)

Transformer secondary (output)

16 to 23 V AC

Power supply

220 V AC 60 Hz

Damper motor

220 V AC 60 Hz

Supply fan

220 V AC

60 Hz

Exhaust fan

220 V AC

60 Hz

Solenoid value

Full-wave rectified voltage

of 220 V AC 60 Hz

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