Fujitsu AS G18KMTA Series Original operating manual

SPLIT TYPE
ROOM AIR CONDITIONER
WALL MOUNTED type
Models Indoor unit Outdoor unit
AS*G18KMTA
AS*G24KMTA
RSG18KMTA
RSG24KMTA
AO*G18KMTA
AO*G24KMTA
ROG18KMTA
ROG24KMTA
INVERTER
SERVICE
INSTRUCTION

2 . TROUBLE SHOOTING
WALL MOUNTED type
INVERTER

02-01
2-1 ERROR DISPLAY
2-1-1 INDOOR UNIT AND WIRED REMOTE CONTROLLER DISPLAY
Please refer the flashing pattern as follows.
The OPERATION, TIMER and ECONOMY lamps operate as follows according to the error contents.
Manual auto switch error
Room temp. sensor error
Indoor unit PCB model
information error
Wired remote controller
communication error
Error Contents
Continuous
Continuous
4 times
Continuous
2 times
3 times
3 times
5 times
Continuous2 times1 time
Continuous1 time1 time
Trouble
shooting
(Green)
(Orange)
(Green)
1 time
Serial communication error
3 times2 times
Combination error
Indoor unit fan motor error
Indoor unit Heat Ex. Middle temp.
sensor error
Continuous
4 times 2 times Continuous
Continuous
1 time5 times
Outdoor unit main PCB model
information error 2 times6 times
3 times6 times
Continuous
Continuous
4 times
7 times
6 times
1 time
Continuous
7 times 3 times
Continuous
7 times 4 times
Continuous
PFC circuit error
Inverter error
Discharge temp. sensor error
Outdoor unit Heat Ex. liquid temp.
sensor error
Outdoor temp. sensor error
1, 2
3
4
5
6
7
8
9
10
11
12
13
14
16
17
18
20
21
22
23
24
Continuous
8 times 4 times
Current sensor error Continuous
Continuous
Continuous
5 times
9 times
9 times
7 times
Compressor rotor position
detection error
Outdoor unit fan motor error
Continuous
4 times9 times
Continuous
Continuous
9 times 9 times
4-way valve error
1 time10 times
Discharge temp. error
Trip detection
Continuous
5 times6 times
Trip terminal L error
Indoor Unit Display Wired Remote
Controller
Display
11
12
23
32
35
41
42
51
62
63
64
65
71
7 times 2 times Continuous
Compressor temp. sensor error 1572
73
74
84
94
19
Continuous
6 times8 times
High pressure switch error 86
95
97
99
A1
25
Continuous
3 times10 times
Compressor temp. error A3
[ ] [ ] [ ]
OPERATION TIMER ECONOMY
2.TROUBLESHOOTING

*: On; Connection information with router is available, Off; Connection information with router is unavailable.
Communication Error
(”Trou. 29” and “Trou. 32” are simultaneous Error)
Trouble
shooting
32
34
Error Contents
Wireless LAN adapter Indicator
LED (Orange)
Network Communication Error
(Communication Error of between
Wireless LAN Router to CLOUD)
External Communication Error
(Communication Error of between
IndoorUnit to Wireless LAN adapter)
On or Off *
Internet
Indoor unit
Controller PCB
Parts :
Wireless LAN
adapter
Wireless
LAN router
CLOUD Mobile App
(Mobile device)
Outdoor unit
2-1-2 WIRELESS LAN INDICATOR DISPLAY
1.WIRELESS LAN CONTROL system layout
2.NAME OF PARTS
3.WIRELESS LAN ADAPTER INDICATOR
Please refer the flashing pattern as follows.
W-LAN LED (orange) operate as follow according to the error contents.
On
Flashing slow
On/Off=7sec/2sec 35
Error Code
18
No Error
33
Network Communication Error
(Communication Error of between
Wireless LAN Router to Wireless LAN adapter)
Flashing slow
On/Off=7sec/2sec No Error
18
Wireless LAN adapter Non-Energized 36
18
02-02
Wireless LAN label
Connection port
MAC:
SSID :AP-WF -
PIN:
Wireless LAN adapter
On or Off *

Error Name
2-1-3 MOBILE APP DISPLAY ( For AIR CONDITIONER )
1.ERROR DISPLAY
If there is an abnormality on the air conditioning, you will see is as follows.
When you tap the "Error button” on the home screen, Error Code and Error Name is displayed.
For Android
For iOS
Error button
Error code
Error Name
Error code
Error button
2.ERROR CODE
Error message Error Code Trouble
shooting
11.1/ 11.2
11.3/11.4
Combination error
12.1
18.1
32.1
2
3
4
Manual auto switch error 35.1 5
Room temp. sensor error 41.1
42.2
6
Indoor unit Heat Ex. Middle temp. sensor error 7
51.1/ 51.2
62.1/ 62.2
63.1/ 63.2
64.1/ 64.3
64.4/ 64.8
65.3
74.1
84.1
94.1
86.4
97.3
99.1
A1.1
Discharge temp. sensor error
Trip terminal L error
71.1
Outdoor unit Heat Ex. liquid temp.sensor error
Outdoor temp. sensor error
73.3
95.1/ 95.3
Discharge temp. error
Outdoor unit fan motor error
4-way valve error
22
21
18
1-1
1-2
8
9
10
11
15
16
17
19
20
12
13
14
Indoor unit fan motor error
Outdoor unit main PCB model information error
Inverter error
PFC circuit error
Compressor rotor position detection error
Current sensor error
Trip detection
High Pressure Switch Error
02-03
Serial communication error
(Serial Reverse Transfer Error)
Serial communication error
(Serial Forward Transfer Error)
Wired remote controller communication error
Indoor unit PCB model information error

Error messages Error messages
2-1-4 MOBILE APP DISPLAY ( In Wireless LAN Control system )
1.ERROR DISPLAY
If there is an abnormality on the Wireless LAN control system, you will see is as follows.
Error messages will disappear at 5 seconds. Then return to normal display.
For Android For iOS
2.ERROR MESSAGES LIST
02-04
Mobile app errors
Registration Errors (For Android)
Error messages
Wi-Fi must be enabled
to set up new device
The user has disabled
Wi-Fi on their mobile
device.
Enable Wi-Fi from the Android
setting.
We weren’t able to sign
you onto null. Please
go to the Wi-Fi settings
and join the network
from there.
Return to the app
when you’re done.
The mobile device
and air conditioner are
connected to different
Wi-Fi networks when
attempting to register.
Connect the mobile device
to the same network as the
air conditioner, then retry the
registration.
Could not connect
to the device at this
time. Please reset the
device and try again.
The air conditioner is
not connected to Wi-Fi.
Check if the router connected to
the air conditioner has internet
access. (You can check by
connecting the mobile device
to the router, then opening the
website.) If there is no access,
connect the router to the internet.
Mobile device is not
connected to the same
network as the air
conditioner.
Connect the mobile device
to the same network as the
air conditioner, then retry the
registration.
The device failed to
connect with service.
Your internet access
may be down or
blocking requests to
the service.
Check if the router connected to
the air conditioner has internet
access. (You can check by
connecting the mobile device
to the router, then opening the
website.) If there is no access,
connect the router to the internet,
then retry the registration.
Causes Solutions

Could not register the
device. Make sure the
device is ready for
registration.
The air conditioner is
not connected to the
router.
Enter the Wi-Fi setting on the
mobile device, then check if the
SSID of the air conditioner
(AP-WF - )
is connected. If the air
conditioner is connected, retry
the registration.
The router the
air conditioner is
connected to, has no
internet access.
Check if the router connected to
the air conditioner has internet
access. (You can check by
connecting the mobile device
to the router, then open the
website.) If there is no access,
connect the router to the internet,
then retry the registration.
The air conditioner
is already registered.
If there is a mobile device that
has already been registered to
the air conditioner, unregister
by using the registered mobile
device. Retry the registration
with the mobile device you wish
to register.
If you do not own the mobile
device registered to the air
conditioner (lost, property of
previous owner, etc.), please
ask your maker service
to unregister the mobile device.
Please notify the MAC address
of the WLAN adapter as written
on the Wireless LAN label.
* If the problem persists even if the all of the above is
conducted, please contact your dealer or authorized
service personnel. When asking for advice, please notify
the MAC address of the WLAN adapter as written on the
Wireless LAN label.
Occurs when
pairing is executed,
when the user
erroneously enter the
SSID of the adapter.
Enter the SSID literally.
(Uppercase and lowercase letters
also match)
Please ensure your air
conditioner is ready to
pair, and that you have
entered its SSID and
password correctly.
Error messages Causes Solutions
02-05

You need an internet
connection to add new
devices.
The user has disabled
Wi-Fi on their mobile
device.
Enable Wi-Fi from the iOS
setting.
Could not register
same LAN device.
Make sure both
devices are in the
same LAN and try
again to register.
The mobile device
and air conditioner are
connected to different
Wi-Fi networks when
attempting to register.
Connect the mobile device
to the same network as the
air conditioner, then retry the
registration.
No registrable device
was found. Make
sure Wi-Fi setup
was successful. This
method only works if
the Wi-Fi was recently
performed.
The air conditioner is
not connected to Wi-Fi.
Check if the router connected to
the air conditioner has internet
access. (You can check by
connecting the mobile device
to the router, then opening the
website.) If there is no access,
connect the router to the internet.
Mobile device is not
connected to the same
network as the air
conditioner.
Connect the mobile device to
the same network as the air
conditioner, then tap register
button.
Could not register the
device. Make sure the
device is ready for
registration.
The air conditioner is
not connected to the
router.
Enter the Wi-Fi setting on the
mobile device, then check if the
SSID of the air conditioner
(AP-WF - )
is connected. If the air
conditioner is connected, retry
the registration.
Registration Errors (For iOS)
Error messages Causes Solutions
02-06

Could not register the
device. Make sure the
device is ready for
registration.
The router the
air conditioner is
connected to, has no
internet access.
Check if the router connected to
the air conditioner has internet
access. (You can check by
connecting the mobile device
to the router, then opening the
website.) If there is no access,
connect the router to the internet,
then retry the registration.
The air conditioner is
already registered.
* If the problem persists even if the all of the above is
conducted, please contact your dealer or authorized
service personnel. When asking for advice, please notify
the MAC address of the WLAN adapter as written on the
Wireless LAN label.
If there is a mobile device that
has already been registered to
the air conditioner, unregister
by using the registered mobile
device. Retry the registration
with the mobile device you wish
to register.
If you do not own the mobile
device registered to the air
conditioner (lost, property of
previous owner, etc.), please
ask your maker service
to unregister the mobile device.
Please notify the MAC address
of the WLAN adapter as written
on the Wireless LAN label.
Error messages Causes Solutions
02-07
Occurs when
pairing is executed,
when the user
erroneously enter the
SSID of the adapter.
Enter the SSID literally.
(Uppercase and lowercase letters
also match)
Please ensure your air
conditioner is ready to
pair, and that you have
entered its SSID and
password correctly.

The router the
air conditioner is
connected to, has no
internet access.
Check if the router connected to
the air conditioner has internet
access. (You can check by
connecting the mobile device
to the router, then opening the
website.) If there is no access,
connect the router to the internet.
The air conditioner is
not connected to the
router.
Check the W-LAN LED indicators
on the air conditioner. If the
W-LAN LED lamp is flashing or
off, please check the
TROUBLESHOOTING “State of
the Wireless LAN indicators”.
General Errors (For Android)
No connectivity to Wi-
Fi or the cloud. Please
check your network
connection.
The mobile device has
no internet access.
Connect the mobile device to the
internet.
An error occurred
while trying to update
your profile. Please try
again later.
Device is offline and
cannot be modified.
Error messages Causes Solutions
02-08

“Device name” is
offline.
(Device name varies
depending on the air
conditioner)
The router the
air conditioner is
connected to has no
internet access.
Check if the router connected to
the air conditioner has internet
access. (You can check by
connecting the mobile device
to the router, then opening the
website to check access.) If there
is no access, connect the router
to the internet.
The air conditioner is
not connected to the
router.
Check the W-LAN LED indicators
on the air conditioner. If the
W-LAN LED lamp is flashing or
off, please check the
TROUBLESHOOTING “State of
the Wireless LAN indicators”.
Sign-in Errors (For Android/ iOS)
Could not reach
service.
The mobile device has
no internet access.
Connect the mobile device to the
internet.
General Errors (For iOS)
Failed to change
password.
The mobile device has
no internet access.
Connect the mobile device to the
internet.
Cloud not determine
service reachability.
Failed to update
property.
Could not retrieve
schedules.
The operation couldn’t
be completed.
Operation timed out.
Error messages Causes Solutions
Error messages Causes Solutions
02-09

Trouble shooting 1
OUTDOOR UNIT Error Method:
Detective Actuators: Detective details:
Forecast of Cause:
OK
Indicate or Display:
Outdoor Unit : No indication
Indoor Unit : Operation lamp: 1 time Flash, Timer lamp: 1 time Flash
Economy lamp: Continuous flash.
ERROR CODE : [E : 11]
YESYES
NO
OK
1.Connection failure 2. External cause 3. Main PCB failure 4. Outdoor unit fan motor failure
Check Point 1-1 : Reset the power and operate
Does Error indication show again?
Check Point 1-2: Check external cause such as noise
Check the complete insulation of the grounding.
Check if there is any equipment that causes harmonic wave
near the power cable (Neon light bulb or any electronic
equipment which causes harmonic wave).
Check Point 2 : Check Connection
Check any loose or removed connection line of
Indoor unit and Outdoor unit.
>>If there is an abnormal condition, correct it by
referring to Installation Manual or Data &
Technical Manual.
Check Point 3 : Check the voltage of power supply
Check the voltage of power supply
>>Check if AC198V (AC220V -10%) - 264V (AC240V +10%) appears
at Outdoor Unit Terminal L - N.
Check Point 4 : Check Serial Signal (Reverse Transfer Signal)
Check Serial Signal (Reverse Transfer Signal)
>>Check if Indicated value swings between AC90V and AC270V at Outdoor Unit Terminal 1 - 3.
>>If it is abnormal, Check Outdoor unit fan motor (PARTS INFORMATION 5)
>>If Outdoor fan motor is abnormal, replace Outdoor unit fan motor and Main PCB.
>>If Outdoor fan motor is normal, replace Main PCB.
When the indoor unit cannot receive the serial signal from Outdoor unit
more than 2minutes after power ON, or the indoor unit cannot receive
the serial signal more than 15seconds during normal operation.
2-2 TROUBLESHOOTING WITH ERROR CODE
Serial communication error
(Serial Reverse Transfer Error)
Outdoor unit Main PCB
Outdoor unit fan motor
02-10
AC
AC
+
-
AC
1
2
3
L
N
RED
WHITE
BLACK
BLACK
WHITE

Trouble shooting 2
INDOOR UNIT Error Method:
Detective Actuators: Detective details:
Forecast of Cause:
OK
Indicate or Display:
YESYES
NO
OK
Serial communication error
(Serial Forward Transfer Error)
Indoor unit Controller PCB
Indoor unit fan motor
Outdoor unit Main PCB
1.Connection failure 2. External cause 3. Controller PCB failure 4. Indoor unit fan motor failure
5.Outdoor unit Main PCB
Check Point 1-1 : Reset the power and operate
Does Error indication show again?
Check Point 1-2: Check external cause such as noise
Check the complete insulation of the grounding.
Check if there is any equipment that causes harmonic wave
near the power cable (Neon light bulb or any electronic
equipment which causes harmonic wave).
Check Point 2 : Check Connection
Check any loose or removed connection line of
Indoor unit and Outdoor unit.
>>If there is an abnormal condition, correct it by
referring to Installation Manual or Data &
Technical Manual.
Check Point 3 : Check the voltage of power supply
Check the voltage of power supply
>>Check if AC198V (AC220V -10%) - 264V (AC240V +10%) appears
at Outdoor Unit Terminal L - N.
Check Point 4 : Check Serial Signal (Forward Transfer Signal)
Check Serial Signal (Forward Transfer Signal)
>>Check if Indicated value swings between AC30V and AC130V at Outdoor Unit Terminal 2 - 3.
>>If it is abnormal, replace Controller PCB.
>>If it is abnormal, Check Indoor unit fan motor. (PARTS INFORMATION 4)
>>If Indoor unit fan motor is abnormal, replace Indoor unit fan motor and Controller PCB.
>>If it is abnormal, replace Outdoor unit Main PCB.
When the outdoor unit cannot receive the serial signal from Indoor unit
more than 10seconds.
Outdoor Unit : No indication
Indoor Unit : Operation lamp: 1 time Flash, Timer lamp: 1 time Flash
Economy lamp: Continuous flash.
ERROR CODE : [E : 11]
02-11
AC
AC
+
-
AC
1
2
3
L
N
RED
WHITE
BLACK
BLACK
WHITE

Trouble shooting 3
INDOOR UNIT Error Method:
Detective Actuators: Detective details:
Forecast of Cause:
Check Point 2 : Check Remote control and Controller PCB
Check Point 1 : Check the connection of terminal
OKOK
Indicate or Display:
Wired remote controller
communication error
Indoor unit Controller PCB
Wired remote control
1. Terminal connection abnormal 2. Wired remote control failure 3. Controller PCB failure
After turning off the power, check & correct the followings.
Check the connection of terminal between remote control and Indoor unit,
and check if there is a disconnection of the cable.
Upon correcting the removed connector or mis-wiring, reset the power.
Check Voltage at CN300 (Terminal 1-2) of UTY-TWRXZ2 (Communication kit).
(Power supply to Remote control)
>> If it is DC12V, Remote control is failure. (Controller PCB is normal) >> Replace Remote control
>> If it is DC 0V, Controller PCB is failure. (Check Remote control once again) >> Replace Controller PCB
Upon receiving the signal more than 1 time from Wired Remote,
but the same signal has not been received more than 1 minute
(3 Wire type), 2.5 minute (2 Wire type)
Outdoor Unit : No indication
Indoor Unit : Operation lamp: 1 time Flash, Timer lamp: 2 times Flash
Economy lamp: Continuous flash.
ERROR CODE : [E : 12]
02-12
DC

Trouble shooting 4
INDOOR UNIT Error Method:
Detective Actuators: Detective details:
Forecast of Cause:
Indicate or Display:
Outdoor Unit : No indication
Indoor Unit : Operation lamp: 2 time Flash, Timer lamp: 3 time Flash
Economy lamp: Continuous flash.
ERROR CODE : [E : 23]
OK
Combination error
Indoor unit
1. The selection of indoor units is incorrect
Check Point 1 : Check the type of indoor unit
Check the type of the connected indoor unit.
>> If abnormal condition is found, correct it.
Check Point 2 : Replace Main PCB
If Check Point 1 do not improve the symptom, replace Main PCB of Outdoor unit.
1. The outdoor unit receives the serial signal of applied refrigerant information
from Indoor unit. When the refrigerant is R410a.
2. When the outdoor unit type is multi.
02-13

Detective Actuators: Detective details:
Forecast of Cause:
Check Point 3 : Replace Controller PCB
Check Point 2 :
Check Indoor unit electric components
YESYES
NO
Trouble shooting 5
INDOOR UNIT Error Method:
Indicate or Display:
Indoor unit PCB model
information error
Indoor unit Controller PCB
1.External cause 2. Defective connection of electric components 3. Controller PCB failure
Check Point 1-1 : Reset Power Supply and operate
Does Error indication show again?
Check Point 1-2 :
Check external cause such as noise
Check if the ground connection is proper.
Check if there is any equipment that causes harmonic wave
near the power cable (Neon light bulb or any electronic
equipment which causes harmonic wave).
Note : EEPROM
EEPROM(Electronically Erasable and
Programmable Read Only Memory) is a non-
volatile memory which keeps memorized
information even if power is turned off. It can
change the contents electronically.
To change the contents, it uses higher voltage
than normal, and it can not change a partial
contents. (Rewriting shall be done upon
erasing the all contents.)
There is a limit in a number of rewriting.
Change Controller PCB.
Check all connectors.
(loose connector or incorrect wiring)
Check any shortage or corrosion on PCB.
When power is on and there is some below case.
1.When model information of EEPROM is incorrect.
2.When the access to EEPROM failed.
Outdoor Unit : No indication
Indoor Unit : Operation lamp: 3 times Flash, Timer lamp: 2 times Flash
Economy lamp: Continuous flash.
ERROR CODE : [E : 32]
02-14

Trouble shooting 6
INDOOR UNIT Error Method:
Indicate or Display:
Detective Actuators: Detective details:
Forecast of Cause :
OKOK
Manual auto switch error
Indoor unit Controller PCB
Indicator PCB
Manual auto switch
When the Manual Auto Switch becomes ON for consecutive 60 or
more seconds.
1.Manual auto switch failure 2.Controller PCB and Indicator PCB failure
Check Point 1 : Check the Manual auto switch
Check if Manual auto switch is kept pressed.
Check Point 2 : Replace Controller PCB
If Check Point 1 do not improve the symptom, change Controller PCB and Indicator PCB.
Check ON/OFF switching operation by using a meter.
>>If Manual Auto Switch is disabled (on/off switching), replace it.
Outdoor Unit : No indication
Indoor Unit : Operation lamp: 3 times Flash, Timer lamp: 5 times Flash
Economy lamp: Continuous flash.
ERROR CODE : [E : 35]
02-15

Trouble shooting 7
INDOOR UNIT Error Method:
Indicate or Display:
Detective Actuators: Detective details:
Forecast of Cause :
Check Point 2 : Remove connector and check Thermistor resistance value
Check Point 1 : Check connection of Connector
Check Point 3 : Check voltage of Controller PCB (DC5.0V)
10.012.515.820.225.933.644.058.2Resistance Value (k )
Temperature
OK
OK
5.36.58.0Resistance Value (k )
Temperature
Room temp. sensor error
Indoor unit Controller PCB
Room temperature thermistor
When Room Temperature Thermistor open or short-circuit is detected.
1.Connector connection failure 2.Thermistor failure 3. Controller PCB failure
Check if connector is removed.
Check erroneous connection.
Check if thermistor cable is open.
>>Upon correcting the removed connector or mis-wiring, reset the power.
Thermistor Characteristics (Approx. value)
If Thermistor is either open or shorted, replace it and reset the power.
Make sure circuit diagram of indoor unit and check terminal voltage at Thermistor (DC5.0V)
If the voltage does not appear, replace Controller PCB.
25°C20°C15°C10°C5°C0°C-5°C-10°C
40°C
4.4
45°C35°C30°C
Outdoor Unit : No indication
Indoor Unit : Operation lamp: 4 times Flash, Timer lamp: 1 time Flash
Economy lamp: Continuous flash.
ERROR CODE : [E : 41]
THERMISTOR
(ROOM TEMP.)
THERMISTOR
(PIPE)
BLACK
CN1
1
2
3
4
1
2
3
4
BLACK
BLACK
BLACK
02-16
DC

Trouble shooting 8
INDOOR UNIT Error Method:
Indicate or Display:
Detective Actuators: Detective details:
Forecast of Cause :
62.9103.3134.2176.0233.2312.3579.61131.9Resistance Value (k )
Temperature
OKOK
OK
17.125.639.6Resistance Value (k )
Temperature
Indoor unit Heat Ex. Middle temp.
sensor error
Indoor unit Controller PCB
Heat Ex. temperature thermistor
When Heat Ex. Temperature Thermistor open or short-circuit is detected.
1.Connector connection failure 2.Thermistor failure 3. Controller PCB failure
Check Point 1 : Check connection of Connector
Check if connector is removed.
Check erroneous connection.
Check if thermistor cable is open.
>>Upon correcting the removed connector or mis-wiring, reset the power.
Check Point 2 : Remove connector and check Thermistor resistance value
Thermistor Characteristics (Approx. value)
If Thermistor is either open or shorted, replace it and reset the power.
Check Point 3 : Check voltage of Controller PCB (DC5.0V)
Make sure circuit diagram of indoor unit and check terminal voltage at Thermistor (DC5.0V)
If the voltage does not appear, replace Controller PCB.
20°C10°C5°C0°C-5°C-10°C-20°C-30°C
50°C
11.6
60°C
10.4
63°C40°C30°C
Outdoor Unit : No indication
Indoor Unit : Operation lamp: 4 times Flash, Timer lamp: 2 times Flash
Economy lamp: Continuous flash.
ERROR CODE : [E : 42]
THERMISTOR
(ROOM TEMP.)
THERMISTOR
(PIPE)
BLACK
CN1
1
2
3
4
1
2
3
4
BLACK
BLACK
BLACK
02-17
DC

Trouble shooting 9
INDOOR UNIT Error Method:
Detective Actuators: Detective details:
Forecast of Cause:
Check Point 1 : Check rotation of Fan
Check Point 2 : Check ambient temp. around motor
OK
OK
OK
Indicate or Display:
Indoor unit fan motor error
Indoor unit Controller PCB
Indoor unit fan motor
1.Fan rotation failure 2. Fan motor winding open 3. Motor protection by surrounding temperature rise
4.Control PCB failure 5. Indoor unit fan motor failure
Rotate the fan by hand when operation is off.
(Check if fan is caught, dropped off or locked motor)
>>If Fan or Bearing is abnormal, replace it.
Check excessively high temperature around the motor.
(If there is any surrounding equipment that causes heat)
>>Upon the temperature coming down, restart operation.
When the condition that actual frequency of Indoor Fan is
below 1/3 of target frequency is continued more than 56 seconds.
Check Point 4 : Replace Controller PCB
If Check Point 1- 3 do not improve the symptom, replace Controller PCB.
Check Point 3 : Check Indoor unit fan motor
Check Indoor unit fan Motor. (PARTS INFORMATION 4)
>>If Indoor unit fan motor is abnormal,
replace Indoor unit fan motor and Controller PCB.
Outdoor Unit : No indication
Indoor Unit : Operation lamp: 5 times Flash, Timer lamp: 1 time Flash
Economy lamp: Continuous flash.
ERROR CODE : [E : 51]
02-18