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

11
9-5. AUTO VANE OPERATION
The horizontal vane position is set to Upward.
To confirm the standard position, the vane moves until it touches the vane stopper. Then the vane is set to the desired angle.
in the following case:
OBH513A

12
When ECONO COOL button is pressed in COOL mode, set temperature is automatically set 2 C higher.
Also the horizontal vane swings in various cycle.
SWING operation makes you feel cooler than set temperature. So, even though the set temperature is higher, the air
conditioner can keep comfort. As a result, energy can be saved.
To cancel this operation, select a different mode or press one of the following buttons in ECONO COOL operation:
ECONO COOL, VANE or LONG button.
To cancel this operation, press one of the following buttons:
ECONO COOL button in COOL mode, VANE or LONG button.
To confirm the standard position, the vane moves until it touches the vane stopper. Then the vane is set to the desired angle.
in the following case:
OBH513A

13
9-6. TIMER OPERATION
OBH513A

14
9-7. EMERGENCY/TEST OPERATION
the test run or the
The indoor fan runs at High speed and the temperature control does not work.
9-8. 3-MINUTE TIME DELAY OPERATION
When the system turns OFF, compressor will not restart for 3 minutes as 3-minute time delay function operates to protect
compressor form overload.
OBH513A

1515
TROUBLESHOOTING
10
10-1. CAUTIONS ON TROUBLESHOOTING
1. Before troubleshooting, check the following:
(1) Check the power supply voltage.
(2) Check the indoor/outdoor connecting wire for mis-wiring.
2. Take care the following during servicing.
(1) Before servicing the air conditioner, be sure to turn OFF the main unit first with the remote controller, and then after
confirming the horizontal vane is closed, turn OFF the breaker and / or disconnect the power plug.
(2) Be sure to turn OFF the power supply before removing the front panel, the cabinet, the top panel, and the electronic
control P.C. board.
(3) When removing the electronic control P.C. board, hold the edge of the board with care NOT to apply stress on the
components.
(4) When connecting or disconnecting the connectors, hold the housing of the connector. DO NOT pull the lead wires.
3. Troubleshooting procedure
(1) First, check if the OPERATION INDICATOR lamp on the indoor unit is flashing ON and OFF to indicate an abnormality.
To make sure, check how many times the OPERATION INDICATOR lamp is flashing ON and OFF before starting serv-
ice work.
(2) Before servicing, check that the connector and terminal are connected properly.
(3) When the electronic control P.C. board seems to be defective, check the copper foil pattern for disconnection and the
components for bursting and discoloration.
(4) When troubleshooting, refer to 10-2. and 10-3.
4. How to replace batteries
Weak batteries may cause the remote controller malfunction.
In this case, replace the batteries to operate the remote controller normally.
Remove the front lid and insert batteries.
Then reattach the front lid.
Lead wiring Housing point
<Incorrect> <Correct>
MSH-GD80VB
RESET button
Insert the negative pole
of the batteries first.
Check if the polarity of
the batteries is correct.
Press the RESET button with a thin instrument, and
then use the remote controller.
NOTE: 1. If the RESET button is not pressed, the remote controller may not operate correctly.
2. Do not use the leaking batteries.
OBH513A

1616
Start
Indoor unit
operates.
Outdoor unit
does not
operate.
Indoor unit
does not receive
the signal from
remote controller.
Indoor unit
operates.
Outdoor unit
does not operate
normally.
OPERATION INDICATOR
lamp on the indoor unit is
flashing ON and OFF.
Outdoor unit
operates only
in “Test run
operation”.
Indoor unit
operates, when
the EMERGENCY
OPERATION
switch is pressed.
Indoor unit
does not operate,
when the
EMERGENCY
OPERATION
switch is pressed.
Check room
temperature
thermistor.
Refer to 10-6.
"Test point
diagram and
voltage".
Refer to
"Check of
outdoor unit".
Refer to 10-5.
"Check of
remote controller
and receiver
P.C. board".
Flash ON and
OFF at 0.5-
second
intervals
Cause:
Indoor/
outdoor unit
• Mis-wiring
2-time flash
Cause:
Indoor unit
• Trouble of
room temp-
erature/
indoor coil
thermistor
3-time flash
Cause:
Indoor unit
• Trouble of
indoor fan
motor
6-time flash
Cause:
Outdoor unit
• Trouble of
thermistor
in outdoor
unit
7-time flash
Cause:
Outdoor unit
• Trouble of
outdoor
control
system
Refer to
10-5.
"How to
check
mis-wiring
(When
outdoor unit
does not
work)".
Check room
temperature
thermistor
and indoor
coil thermis-
tor.
Refer to 10-6.
"Test point
diagram and
voltage".
Refer to
10-5.
"Check of
indoor fan
motor".
Refer to
"Check of
outdoor
thermistor".
Replace the
deicer
P.C. board.
10-time flash
Cause:
Outdoor unit
• Trouble of
low discharge
temperature
protection
Refer to
"Check of
LEV".
4-time flash
Cause:
Indoor unit
• Trouble of
indoor unit
control
system
Replace the
indoor
electronic
control
P.C. board.
Refer to outdoor unit service manual.
1. Check indoor /
outdoor
connecting wire.
2. Refer to 10-5.
"Check of indoor
electronic control
P.C. board".
Outdoor unit
does not
stop even
if indoor unit
stops.
Unit does not
operate
normal
operation in
COOL or
HEAT mode.
Refer to
"Check of
outdoor unit".
Refer to
"Check of
R.V. coil".
"Test run operation" means the operation within 30 minutes after EMERGENCY OPERATION switch is pressed.
Outdoor unit
does not
operate
even in
“Test run
operation”.
10-2. INSTRUCTION OF TROUBLESHOOTING
OBH513A

1717
10-3. TROUBLESHOOTING CHECK TABLE
No.
1
2
4
6
7
SymptomOperation indicator lamp Condition Remedy
0.5-second ON
0.5-second OFF
Mis-Wiring
Outdoor
thermistor
Outdoor
control
system
Indoor coil
thermistor
3 minutes after power supply turns ON,
serial signal is not received.
<Thermistor short>
Thermistors are abnormal when they short
after compressor start-up.
<Thermistor open>
Thermistors are abnormal when they open
after compressor start-up.
However, discharge temperature thermistor is
abnormal when open circuit is detected more
than 10 minutes after compressor start-up.
It cannot properly read data in the nonvolatile
memory of the deicer P.C. board.
• Shortage of refrigerant
• Check the deicer P.C. board.
Refer to "Check of outdoor
thermistor". Refer to outdoor
service manual.
• Check the deicer P.C. board.
Refer to outdoor service
manual.
3Indoor fan
motor
Low
discharge
temperature
protection
Discharge temperature has been 50
or less on cool operation, or has been 49
or less on heat operation for 20 minutes.
Abnormal
point
Outdoor unit
does not
operate.
Room
temperature
thermistor
2-time flash
2.5-second OFF
Indoor coil/room temperature thermistor
detects short or open circuit every 8 seconds
during operation.
• Refer to the characteristics
of indoor coil thermistor, and
room temperature thermistor
on 10-6.
3-time flash
2.5-second OFF
Indoor fan repeats
12 seconds ON
and 3minutes OFF.
When the indoor
fan breaks, the fan
keeps stopping.
The rotational frequency feedback signal is
not emitted for 12 seconds after indoor fan
motor is operated.
• Refer to 10-5. "How to
check mis-wiring ".
• Refer to 10-5. "Check of
indoor fan motor".
4-time flash
2.5-second OFF
Indoor
control
system
It cannot properly read data in the nonvolatile
memory of the indoor electronic control P.C.
board.
Outdoor unit
does not
operate.
Outdoor unit
does not
operate.
• Check the indoor electronic
control P.C. board.
6-time flash
2.5-second OFF
• Refer to "Check of LEV".
• Check refrigerant circuit and
refrigerant amount.
Refer to outdoor unit service
manual.
Outdoor unit
does not
operate.
Outdoor unit
does not
operate.
Outdoor unit
does not
operate.
5
7-time flash
2.5-second OFF
10-time flash
2.5-second OFF
Lighted
Not lighted
• Before taking measures, make sure that the symptom reappears for accurate troubleshooting.
When the indoor unit has started operation and the following detection method has detected an abnormality
(the first detection after the power ON), the indoor electronic control P.C. board turns OFF the indoor fan motor
with the OPERATION INDICATOR lamp flashing.
· Flashing of the OPERATION INDICATOR lamp (the left-hand side lamp)
indicates possible abnormalities.
OBH513A

1818
MSH-GD80VB
Part name FigureCheck method and criterion
Indoor fan motor (MF)
INNER
PROTECTOR
135 ± 5 OPEN
Color of
lead wire
WHT – BLK
BLK – RED
Room temperature
thermistor (RT11)
Indoor coil thermistor
(RT12 (main), RT13 (sub))
Horizontal vane
motor (MV1)
Vertical vane
motor (MV2)
Motor part
Sensor part
Measure the resistance between the terminals with a tester.
(Part temperature 10°C ~ 30°C)
Color of lead wire
BRN – YLW
YLW – GRY
Normal
4.5 ~ 5.5 V
Measure the voltage power ON.
(When fan revolved one time)
0 V 5 V 0 V
(Approx.)
Normal
282 Ω~ 306 Ω
Measure the resistance between the terminal with a tester.
(Part temperature 10°C ~ 30°C)
BLK
RED
WHT
GRY
YLW BRN
132 Ω~ 144 Ω
152 Ω~ 166 Ω
Normal
Measure the resistance with a tester.
(Part temperature 10°C ~ 30°C)
Refer to 10-6."Test point diagram and voltage",
"Indoor electronic control P.C. board", for the chart of thermistor.
YLW
GRNORN
BRN
RED ROTOR
MAIN
AUX.
P
: INNER PROTECTOR
P
10-4. TROUBLE CRITERION OF MAIN PARTS
OBH513A

19
No
(not clear)
19
Yes
Yes
Check of indoor fan motor
A
Check of remote controller and receiver P.C. board
B
When OPERATION INDICATOR lamp flashes 3-time. Indoor fan motor does not operate.
Disconnect lead wires from connector CN211 on the indoor electronic control P.C. board.
Measure resistance between lead wires No.3 and No.4 and then No.1 and No.4.
Are lead wires connected? Is soldered point of the connector
correctly soldered?
Is resistance 0 (short circuit) or (open circuit)?
Indoor unit operates by pressing the EMERGENCY OPERATION switch, but does not operate with the remote control-
ler.
Replace the batteries (Refer to 10-1.4.).
Is noise heard from radio?
Are there any fluorescent lights of
inverter or rapid-start type within
the range of 1 m?
Measure the voltage between receiver P.C. board connector CN301 No.1(+) and No.3(-) when the remote
controller button is pressed (Refer to 10-6.).
Is the voltage approximately 4 V DC?
Yes ( 0 or )
No
(others)
Yes
No
Yes
No
Is LCD display on the remote con-
troller visible?
Remove the batteries, then set them back
and press the RESET button. Check if the
unit operates with the remote controller.
Yes
Does the unit operate with the
remote controller?
Yes
OK
Yes
No
No
No(5 V or 0 V DC)
No
Resolder it.
Reconnect the lead wires.
Repair or replace the indoor fan motor.
Replace the remote controller.
Reinstall the unit away from lights.
Attach a filter on receiving part.
Replace the indoor electronic control P.C.
board.
Replace the receiver P.C. board.
Turn OFF the power supply.
Check connector CN211 visually.
Check if the remote controller is exclusive for this air conditioner.
Turn ON the power supply. Stop it if the unit operate.
Insert screwdriver into air outlet to rotate indoor fan
motor slowly for 1 revolution or over, and measure
voltage between No.2(+) and No.3(-) on CN121.
Replace the indoor electronic control P.C. board.
Does voltage repeat 0 V DC and 5 V DC?
Yes
No
10-5. TROUBLESHOOTING FLOW
Turn ON a radio to AM and press
OPERATE/STOP (ON/OFF) button on the
remote controller.
Press OPERATE/STOP (ON/OFF)
button on the remote controller.
OBH513A

2020
Check of indoor electronic control P.C. board
C
Check the both “parts side” and “pattern
side” of indoor electronic control P.C.
board visually.
Replace the fuse.
Is fuse (F11) blown?
Replace the fan
motor.
Replace the indoor
electronic control
P.C. board.
Is winding
resistance of
fan motor 0 Ω?
Is winding
resistance of
vane motor 0 Ω?
No
Yes
Replace the vane
motor.
Yes
Yes
Is varistor (NR11) burnt?
Replace the varistor.
Yes
Turn OFF the power supply.
Remove indoor fan motor connector CN211 and
vane motor connector CN151 from the indoor electronic
control P.C. board and turn ON the power supply.
No
Does the unit operate with the remote controller?
Does the OPERATION INDICATOR lamp light up
by pressing the EMERGENCY OPERATION switch?
Yes
No
Turn OFF the
power supply.
Turn OFF the
power supply.
Varistor (NR11)
Indoor electronic
control P.C. board
Fuse (F11)
No
No
The unit does not operate with the remote controller. Also, the OPERATION INDICATOR lamp does not light up by
pressing the EMERGENCY OPERATION switch.
OBH513A