Mitsubishi Electric MSH-GD80VB-E1 User manual

CONTENTS
1. TECHNICAL CHANGES ··································· 2
2. PART NAMES AND FUNCTIONS····················· 2
3. SPECIFICATION················································ 3
4. NOISE CRITERIA CURVES ······························ 3
5. OUTLINES AND DIMENSIONS ························ 4
6. WIRING DIAGRAM············································ 5
7. REFRIGERANT SYSTEM DIAGRAM ··············· 5
8. SERVICE FUNCTIONS ····································· 6
9. MICROPROCESSOR CONTROL ····················· 8
10. TROUBLESHOOTING····································· 15
11. DISASSEMBLY INSTRUCTIONS ···················· 24
MSH-GD80VB - E1
SPLIT-TYPE AIR CONDITIONERS
SERVICE MANUAL
Wireless type
Model
INDOOR UNIT
NOTE:
RoHS compliant products have <G> mark on the spec name plate.
Outdoor unit service manual
MUH-GD•VB Series (OBH514)
No. OBH513
REVISED EDITION-A
PARTS CATALOG (OBB513)
Revision A:
• Another type of the electronic control P.C.
board (TYPE 2) has been added to the
original one (TYPE 1). They are both com-
patible with MSH-GD80VB- E1 .
Please void OBH513.

TECHNICAL CHANGES
2
1
PART NAMES AND FUNCTIONS
2
Front panel
(When the grille is opened)
Remote controller
Operation section Display section
Emergency operation switch
Operation indicator lamp
Air inlet
To breaker
Power supply cord
Remote control
receiving section
Air cleaning filter (option)
(White bellows type)
Horizontal vane
Vertical vanes
Catechin air filter
Remote control
receiving section
Panel
MSH-GD80VB
MSH-GD80VB - E1
1. New model
ACCESSORIES
Installation plate
Installation plate fixing screw 4 25 mm
Remote controller holder
Fixing screw for 3.5 1.6 mm (Black)
Battery (AAA) for remote controller
Wireless remote controller
Felt tape (Used for left or left-rear piping)
1
7
1
2
2
1
1
MSH-GD80VB
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.
Revision A:
• Another type of the electronic control P.C. board (TYPE 2) has been added to the original one (TYPE 1). They are both com-
patible with MSH-GD80VB- E1 .
OBH513A

3
SPECIFICATION
3
NOTE: Test conditions are based on ISO 5151.
Cooling: Indoor Dry-bulb temperature 27°C Wet-bulb temperature 19°C
Outdoor Dry-bulb temperature 35°C Wet-bulb temperature 24°C
Heating: Indoor Dry-bulb temperature 20°C Wet-bulb temperature 15.5°C
Outdoor Dry-bulb temperature 7°C Wet-bulb temperature 6°C
Indoor-Outdoor piping length: 5 m
Indoor model
Function
Power supply
Air flow
(High/Med./Low)
Running current
Power input
Power factor
Fan motor current
Model
Dimensions W H D
Weight
Air direction
Sound level
(High/Med./Low)
Fan speed (High/Med./Low)
Fan speed regulator
Remote controller model
Fan motor Electrical data
Special remarks
Cooling Heating
Single phase
230 V, 50 Hz
954/822/684
0.34
69
88
0.34
RC4V40-AA
1,100 325 258
16
5
47/42/37
1,280/1,130/970
954/834/726
1,280/1,150/1,020
3
KM04A
/h
A
Breaker capacity 10
A
W
%
A
mm
kg
dB
rpm
MSH-GD80VB
NOISE CRITERIA CURVES
4
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
Test conditions,
Cooling : Dry-bulb temperature 27 Wet-bulb temperature 19
47
SPL(dB(A)) LINE
High
FAN SPEED
Heating : Dry-bulb temperature 20 Wet-bulb temperature 15.5
MSH-GD80VB
INDOOR UNIT
WALL
MICROPHONE
0.8m
1m
OBH513A

4
OUTLINES AND DIMENSIONS
5
258
162
19
58
47
7.5
315
255.547
2.5
98 173
98 173414.5 414.5
5
253
791
56
1068
1100
325
Air out
Air in
Insulation 28
Drain hose 16
(Connected part O.D)
Installation plate
Wall hole 75
Wireless remote controller
Installation plate Indoor unit
{
Liquid line 9.52- 0.5 m
Gas line 12-0.43 m
Insulation 50 O.D
32 I.D
Power supply cord
Lead to right 2.0 m
Lead to left 1.0 m
MSH-GD80VB Unit: mm
OBH513A

5
Indoor
heat
exchanger
Flared connection
Room temperature
thermistor
RT11
Indoor coil
thermistor
RT13 (sub)
Flared connection
Refrigerant pipe 15.88
(with heat insulator)
Refrigerant pipe 9.52
(with heat insulator)
Indoor coil
thermistor
RT12 (main)
Strainer
#50
5
WIRING DIAGRAM
6
MSH-GD80VB
REFRIGERANT SYSTEM DIAGRAM
7
Refrigerant flow in cooling
Refrigerant flow in heating
Unit:mm
MSH-GD80VB
OBH513A

6
SERVICE FUNCTIONS
8
Table 1
No. 1 unit
No. 2 unit
No. 3 unit
No. 4 unit
1 unit operation
No modification
–
–
–
2 units operation
Same as at left
Solder J1
–
–
3 units operation
Same as at left
Same as at left
Solder J2
–
4 units operation
Same as at left
Same as at left
Same as at left
Solder both J1 and J2
8-2. P.C. BOARD MODIFICATION FOR INDIVIDUAL OPERATION
A maximum of 4 indoor units with wireless remote controllers can be used in a room.
In this case, to operate each indoor unit individually by each remote controller, P.C. boards of remote controller must be
modified according to the number of the indoor unit.
How to modify the remote controller P.C. board
Remove batteries before modification.
The board has a print as shown below:
8-1. TIMER SHORT MODE
For service, set time can be shortened by short circuit of JPG and JPS on the electronic control P.C. board. (Refer to 10-6.)
The time will be shortened as follows.
Set time: 1 minute 1-second
Set time: 3 minute 3-second (It takes 3 minutes for the compressor to start operation. However, the starting time is short-
ened by short circuit of JPG and JPS.)
The P.C. board has the print “J1” and “J2”. Solder “J1” and “J2” according to the number of indoor unit as shown in Table 1.
After modification, press the RESET button.
MSH-GD80VB
How to set the remote controller exclusively for particular indoor unit
After you turn the breaker ON, the first remote controller that sends the signal to the indoor unit will be regarded as the
remote controller for the indoor unit.
The indoor unit will only accept the signal from the remote controller that has been assigned to the indoor unit once they are
set. The setting will be cancelled if the breaker has turned off, or the power supply has shut down.
Please conduct the above setting once again after the power has restored.
NOTE: For modification, take out the batteries and press the OPERATE/STOP (ON/OFF) button 2 or 3 times at first.
After modification, put back the batteries then press the RESET button.
J2
J1
OBH513A

7
Operation
If the main power has been cut, the operation settings remain.
After the power is restored, the unit restarts automatically
according to the memory. (However, it takes at least 3 minutes
for the compressor to start running.)
How to disable “AUTO RESTART FUNCTION”
Turn OFF the main power for the unit.
Solder jumper wire to JR07 on the indoor
electronic control P.C. board. (Refer to 10-6.)
NOTE:
•The operation settings are memorized when 10 seconds have passed after the remote controller was operated with the
remote controller.
•If main power is turned OFF or a power failure occurs while AUTO START/STOP timer is active, the timer setting is
cancelled.
•If the unit has been OFF with the remote controller before power failure, the auto restart function does not work as the
power button of the remote controller is OFF.
•To prevent breaker OFF due to the rush of starting current, systematize other home appliances not to turn ON at the same
time.
•When some air conditioners are connected to the same supply system, if they are operated before power failure, the
starting current of all the compressors may flow simultaneously at restart.
Therefore, the special counter-measures are required to prevent the main voltage-drop or the rush of the starting current
by adding to the system that allows the units to start one by one.
When the indoor unit is controlled with the remote controller, the operation mode, set temperature, and the fan speed are
memorized by the indoor electronic control P.C. board. “AUTO RESTART FUNCTION” automatically starts operation in the
same mode just before the shutoff of the main power. However if the unit is operated in “I FEEL CONTROL” mode before
power failure, the operation is not memorized. In “I FEEL CONTROL” mode, the operation is decided by the initial room
temperature.
8-3. AUTO RESTART FUNCTION
OBH513A

8
MICROPROCESSOR CONTROL
9
Approx. 2
or more
Difference
between target
temperature
and room
temperature
Approx. 2
or less
This shows that the
air conditioner is
operating to reach
the target temperature.
Please wait until the
target temperature is
obtained.
This shows that the
room temperature is
approaching the
target temperature.
Operation stateIndication
OPERATION INDICATOR lamp
The OPERATION INDICATOR at the right side of the indoor
unit indicates the operation state.
INDOOR UNIT DISPLAY SECTION
The following indication applies regardless of
shape of the indicator.
Lighted
Not lighted
MSH-GD80VB
HEAT
ON/OFF
FAN
TOO
WARM TOO COOL
VANE
MODE
ECONO COOL
STOP
START
HR.
MIN.
WIDE VANE
LONG
I FEEL COOL
DRY
PM
CLOCK
AM
RESET CLOCK
OPERATION SELECT button
FAN SPEED CONTROL button
OFF-TIMER button
HR. button
MIN. button
(TIME SET button)
ON-TIMER button
RESET button
ECONO COOL button
VANE button
(Horizontal vane button)
CLOCK SET button
LONG button
WIDE VANE button
(Vertical vane button)
ON/OFF
TOO
COOL
PM
AM
TOO
WARM
Signal transmitting section
Operation display section
OPERATE/STOP
(ON/OFF) button
TEMPERATURE buttons
WIRELESS REMOTE CONTROLLER
NOTE:
• The last setting will be stored after the unit is turned OFF with the remote controller.
• Indoor unit receives the signal of the remote controller with beeps.
OBH513A

9
The set temperature is determined from the initial room temperature.
9-1. COOL ( ) OPERATION
9-2. DRY ( ) OPERATION
9-3. HEAT ( ) OPERATION
2.
1. Coil frost prevention
When the temperature of indoor heat exchanger becomes too low, the coil frost prevention mode works.
The indoor fan operates at the set speed and the compressor stops. This mode continues until the temperature of indoor
heat exchanger rises.
ON
2.
3.
Defrosting starts when the temperature of outdoor heat exchanger becomes too low.
The compressor stops once, the indoor/outdoor fans stop, the 4-way valve reverses, and the compressor re-starts.
This mode continues until the temperature of outdoor heat exchanger rises or the fixed time passes.
When the compressor is not operating or is starting, and the temperature of indoor heat exchanger and/or the room
temperature is low or when defrosting is being done, the indoor fan will stop or rotate in Very Low speed.
Cold air prevention control
However, when the coil frost prevention works while the compressor is not operating, the indoor fan speed becomes Low.
Mode
COOL mode of
"I FEEL CONTROL"
DRY mode of
"I FEEL CONTROL"
HEAT mode of
"I FEEL CONTROL"
Initial room temperature
25 or more
23 to 25
less than 23
9-4."I FEEL CONTROL" ( ) OPERATION
(1) Press OPERATE/STOP (ON/OFF) button on the remote controller.
OPERATION INDICATOR lamp of the indoor unit turns ON with a beep tone.
(2) Select "I FEEL CONTROL" mode with OPERATION SELECT button.
(3) The operation mode is determined by the room temperature at start-up of the operation.
OBH513A

10
OBH513A