Hunter Fan R410A User Manual
S
M
E
S
M
FFDDAA SSeerriieess SSpplliitt SSyysstteemmss
FFDDAA SSeerriieess MMuullttii SSyysstteemms
E
A
A
R
R
N
N
VII
V
U
U
C
C
A
A
E
L
E
L
s
MITSUBISHI HEAVY INDUSTRIES - PAC SERVICE MANUAL
INDEX
MAINTENANCE DATA 2
ERROR CODES 4
PCB INDOOR UNITS 8
ERROR DISPLAY & REMEDY CHART 12
PCB OUTDOOR UNITS 22
ERROR DISPLAY – OUTDOOR UNIT 25
OPERATIONAL DATA CHECK – WIRED CONTROLLER 35
REMOTE CONTROL – WIRED 36
- SETTING FUNCTIONS 37
ERROR DISPLAY – WIRELESS CONTROL 43
REMOTE CONTROL WIRELESS 44
1. MAINTENANCE DATA
1.1 Servicing
(1) Evacuation
The evacuation is a procedure to purge impurities, such as noncondensable gas, air, moisture from the refrigerant equipment by
using a vacuum pump. Since the refrigerant R410A is very insoluble in water, even a small amount of moisture left in the refriger-
ant equipment will freeze, causing what is called ice clogging.
Evacuation procedure
Make sure that the both service valves of gas and liquid line are fully opened.
(a) Check to ensure that there is no internal pres-
sure in the unit. If there is an internal pres-
sure, it should be relived through the service
port.
(b) Connect the charging hose of the gauge mani-
Outdoor unit
fold to the service port of the gas piping.
Close high pressure valve 2 of gange mani-
fold.
(c) Connect the charging hose A to a vacuum
pump.
Repeat evacuation in the following sequence.
Handle Lo
Please run the
vacuum pump for at
least one hour after
the vacuum gauge
Vacuuming begins
shows -101kPa or
lower. (-755mmHg or
lower)
When the vacuum gauge's needle pointer creeps up,
there is moisture left in the system or a leak. Pull air
again after you have checked the system for a leak and
rectified it. Use a reverse flow stop adapter to prevent
the vacuum pump's lubricant oil from flowing into the
refrigerant system.
No increase in the
reading of the
vacuum gauge's
needle pointer.
Vacuuming completed
Vacuum gauge check
Notes (1) Refer to the exterior-view drawing for the position of the service valve.
Notes (2) When connecting of ther service valve, flare connection for both the
Charge hose
(for R410A only)
Charge valve
Vacuum adapter
(for R410A only)
indoor and outdoor unit.
Indoor unit
Gus line
Liquid line
Charge port
Gauge manifold
(for R410A only)
12
Vacuum
pump
Handle Hi
Charge hose A
(for R410A only)
3
Refrigerant
cylinder
Notes (1) Do not use the refrigerant pressure to expel air.
Notes (2) Do not use the compressor for evacuation.
Notes (3) Do not operate the compressor in a vacuum condition.
-
-
2
(2) Refrigerant charging
(a) After the evacuation shown in the above, change the connection of the charge hose A to the refrigerant cylinder.
(b) Purge air from the charge hose A .
First loosen the connecting portion of the charge hose at the gauge manifold side and open valve 3 for a few seconds, and
then immediately retighten it after observing that gas has blown out from loosened connecting portion.
(c) Open valves 1 and 3 then gas refrigerant begins flowing from the cylinder into the unit.
When refrigerant has been charged into the unit to some extent, refrigerant flow becomes stagnant. When that happens, start
the compressor in cooling cycle until the system is filled with the specified amount of gas, then close valves 1 and 3 and
remove the gauge manifold. Cover the service port with caps and tighten them securely.
(d) Check for gas leakage by applying a gas leak detector around the piping connection.
(e) Start the air conditioner and make sure of its operating condition.
1.2 Trouble shooting for refrigerant circuit
(1) Judgement of operating condition by operation pressure and temperature difference
Making an accurate judgement requires a skill that is acquired only after years of experience, one trouble may lead to an another
trouble from a single trouble source and several other troubles may exist at the same time which comes from a undetected different
trouble source.
Filtering out the trouble sources can be done easier by comparing with daily operating conditions. Some good guides are to judge
the operating pressure and the temperature difference between suction air and delivery air.
Following are some pointers,
Pressure
Indi-
Circuit
cation
Too low
A little low
A little
Normal
high
High side ¡
Low side ¡
Too high
1) Excessive overcharging of refrigerant
2) Mixture of non condensable gas (air etc.)
Trouble cause
High side ¡ Ineffective compression
Low side ¡ (defective compressor)
High side ¡
Low side ¡
1) Insufficient refrigerant in circuit
2) Clogging of strainer
3) Gas leakage
4) Clogging of air filter (in cooling)
5) Decrease in heat load (in cooling)
6) Locking of indoor fan (in cooling)
High side ¡
Low side ¡
1) Locking of outdoor unit fan (in cooling)
2) Dirty outdoor heat exchanger (in cooling)
3) Mixture of non condensable gas (air etc.)
High side ¡
Low side ¡
1) Too high temperature of room
-
-
3
(1) Selfdiagnosis function
(a) Check Indicator Table
Whether a failure exists or not on the indoor unit and outdoor unit can be know by the contents of remote controller eroor code
and microcomputer normality pilot lamp) or red LED (check pilot lamp).
1) Indoor unit side
1.3 Diagnosing of microcomputer circuit
, indoor/outdoor unit green LED (power pilot lamp
Remote
controller
error code
No-indication
LCD flashes
continuously
or is off.
-
4
Green
Keeps flashing
Stays OFF Stays OFF Stays OFF
Keeps flashing
Keeps flashing
Keeps flashing Keeps flashingStays OFF 2 time flash
Keeps flashing
Red
Stays OFF
Stays OFF
*3 time flash
Stays OFF
Keeps flashing
Keeps flashing
Keeps flashing
Keeps flashing
-
E1
E5
E6
E7
E8
E9
E10
E16
E28
Note (1) The green LED in the outdoor unit is used in the FDCA301 ~ 601 models only.
Stay OFF or Lights
continously
Keeps flashing
Keeps flashing
Keeps flashing
Keeps flashing
Keeps flashing
Keeps flashing
Keeps flashing Keeps flashing1 time flash Stays OFF
Keeps flashing
Keeps flashing
Keeps flashing
Keeps flashing
Stay OFF
Stay OFF
2 time flash
2 time flash
2 time flash
1 time flash
1 time flash
1 time flash
Stays OFF
Stays OFF
Stays OFF
Keeps flashing
Keeps flashing
Keeps flashing
Keeps flashing
Keeps flashing
Keeps flashing
Keeps flashing
Keeps flashing
Keeps flashing
Keeps flashing
Outdoor unit LEDIndoor unit LED
Green
Stays OFF
Red
Stays OFF
Stays OFF
Stays OFF
Stays OFF
Stays OFF
Stays OFF
Stays OFF
2 time flash
Stays OFF
Stays OFF
Stays OFF
Stays OFF
Stays OFF
Stays OFF
Stays OFF
Stays OFF
Cause
Normal
Power OFF, L phase wiring is open, power source failure
Indoor unit microcomputer failure
Remote controller wires X and Y are reversely connected. *For wire breaking at
power ON, the LED is OFF. Remote controller wire is open. (X wire breaking : A
beep is produced and no indication is made. Z wire breaking : No beep and no
indication) The remote controller wires Y and Z are reversely connected.
Poor connection or disconnection in wires connecting the indoor and outdoor
units.
When multiple remote controllers are used for control, the power supply to some
indoor units is OFF.
Indoor unit PCB fault
The remote controller wire Y is open. The remote controller wires X and Y are
reversely connected. Noise is penetrating the remote control lines. The remote
controller or indoor control PCB is faulty. (The communications circuit is faulty.)
Indoor / outdoor transmission error.
Outdoor unit control PCB is faulty when the power is turned on, or the inverter
parts are faulty (FDCVA 151~251 type).
Outdoor unit microcomputer failure
Indoor unit heat exchanger thermistor failure
Indoor unit return air thermistor failure
Heating overload (indoor heat exchanger temperature is abnormally high) and
indoor heat exchanger thermistor is faulty.
The float SW operates (with FS only). Drain up kit wiring fault.
When multi-unit control by remote controller is performed, the number of units is
over (more than 17 units). Two remote controller are provided for one controller is
performed.
Fan motor is faulty (FDTA 501, 601 type, FDKN type).
Remote controller thermistor failure
Outdoor unit LEDIndoor unit LED
Green
Keeps flashing
Keeps flashing
Keeps flashing
Keeps flashing
Keeps flashing
Keeps flashing
Keeps flashing
Keeps flashing
Keeps flashing
Keeps flashing
Keeps flashing
Keeps flashing
Keeps flashing
Keeps flashing
Keeps flashing
Keeps flashing
Keeps flashing
Keeps flashing
Red Green
Stays OFF
Stays OFF
Stays OFF
Stays OFF
Stays OFF
Stays OFF
Stays OFF
Stays OFF
Stays OFF
Stays OFF
1 time flash
1 time flash
1 time flash
1 time flash
1 time flash
1 time flash
1 time flash
1 time flash
1 time flash
1 time flash
Red
Wiring is open or reversal phase (FDCA 301~601 type)
Abnormal current cut of compressor (FDCA 301~601 type)
52C secondary side L3-phase wiring is open. (FDCA 301~601 type)
Discharge temperature abnormality.
Discharge pipe thermistor failure
63H1 operation (FDCA 301~601 type)
Outdoor air temperature thermistor failure
Inverter Over-voltage Trouble. (FDCVA 151~251 type)
DC fan motor abnormal. (FDCVA 151~251 type)
Remote
controller
error code
E32
E33
E34
E36
E37
E38
E39
E40
E47
E48
Cause
Keeps flashing Keeps flashing
Stays OFF 1 time flash
E35
Keeps flashing
Stays OFF 1 time flash
Current (Abnormalities in a compressor over current)
E42
Keeps flashing Keeps flashing
Stays OFF Lights contiously
52C abnormal. (FDCA 301~601 type)
E52
Keeps flashing
Keeps flashing
Stays OFF 1 time flash
Power transistor thermistor is faulty or disconnection or connector
connections are poor. (FDCVA 151~251 type)
E56
Keeps flashing
Stays OFF 1 time flash
Insufficient refrigerant.
E57
1 time flash
Keeps flashing
Stays OFF 2 time flash
Compressor startup error (FDCVA 151~251 type)
E59
3 time flash
Keeps flashing
Stays OFF 1 time flash
Compressor loader position detection error. (FDCVA 151~251 type)
E60
Outdoor unit heat exchanger thermistor
failure
Outdoor heat exchanger temperature is high or outdoor heat exchanger thermistor
is faulty.
Inverter primary side current is abnormal. (FDCVA151~251 type)
2) Outdoor unit side
-
5
-
Note (1) The green LED in the outdoor unit is used in the FDCA301 ~ 601 models only.
(b) Display sequence of error, inspection display lamp
1) One kind error
Display corresponding to the error is shown.
2) More than one errors.
Section Display section
Error code of remote controller
Inspection LED (red) of indoor unit PCB
Inspection LED (red) of outdoor unit PCB
• Displays the error of higher priority (When plural errors are persisting)
• Displays the present errors.
(When a new error has occurred after the former error was reset.)
3) Timing of error detection
● Indoor unit side.
Error detail Error code Timing of error detection
······················
Drain error (float switch motion)
Wrong connection between the indoor and
outdoor units.
Transmission error of remote controller
indoor unit
Transmission error between indoor/outdoor
units
The number of connected indoor units
exceeds the connection limit (when
multiple units are control by a single remote
controller).
Broken wire of indoor unit return air
thermistor
Broken wire of heat exchanger thermistor
● Outdoor unit side.
Error detail Error code Timing of error detection
Broken wire of outdoor air temperature
thermistor
Broken wire of heat exchanger thermister
Broken wire of discharge pipe thermistor
Broken wire of power transistor
thermistor
“ Wait ”
Normally, 30 seconds after the power is turned ON.
No communications even once with the outdoor unit.
After 1 or more communications of the indoor unit with the remote controller
following power on, transmission errors cause an interruption for 2 minutes.
After communications with the outdoor unit 1 or more times, communications
are abnormal continuously for 2 minutes.
Normally after the power is turned ON (during communications).
When an input temperature of –50°C or lower is measured by the return air
thermistor is measured for 5 seconds or longer within 60 minutes after the
first detection.
When an input temperature of –50°C or lower is measured by the heat
exchanger thermistor is measured for 5 seconds or longer within 60 minutes
after the first detection.
When a thermistor input temperature of –30°C or lower is measured for 5
seconds or longer 3 times within 40 (60) minutes after the 1st detection
between 2 minutes and 2 minutes 20 seconds after compressor operation
starts.
When a thermistor input temperature of –30°C or lower is measured for 5
seconds or longer 3 times within 40 (60) minutes after the 1st detection
between 2 minutes and 2 minutes 20 seconds after compressor operation
starts.
When a thermistor input temperature of –10°C or lower is measured for 5
seconds or longer 3 times within 40 (60) minutes after the 1st detection
between 10 minutes and 10 minutes 20 seconds (between 2 minutes and 2
minutes 20 seconds) after compressor operation starts.
When the under-dome thermistor input temperature of –10°C is measured for
5 seconds or longer 3 times within 40 minutes after the 1st detection between
10 minutes and 10 minutes 20 seconds after compressor operation starts.
Notes (1) Values in ( ) show for the FDCA301~601 models.
(2) The power transistor temperature sensor is used in the FDCVA151~251 models only.
-
6
-
4) Recording and reset of error
Error display Memory Reset
Error code of remote
controller
Indoor unit inspection lamp
(red)
Outdoor unit inspection lamp
(red)
Notes (1) Priority is in the order of E1 > ... > E10 > ... > E60.
• Saves in memory the mode
priority
• Cannot save in memory
• Saves in memory the mode
priority
(1)
of higher
(1)
of higher
• Stop the unit operation by pressing the ON/OFF switch of remote
controller.
• Operation can be started again if the error has been reset.
Indoor unit
: Press the ON/OFF button on the remote controller. Or disconnect and reconnect the power supply connector
(CNW1 or CNW0) on the indoor unit control PCB or turn the main power supply OFF.
Outdoor unit
: Turn the main power supply OFF.
(2) Procedures of trouble diagnosis
When any error occurs, inspect in following sequence. Detailed explanation on each step is given later in this text.
Error Power supply reset
Replacement or repair of defective
parts Test run/adjustment
Note (1) It means the operation to turn off the power and back on again more than 1 min. later in order to reset the malfunction of microcomputer due to the
effect of power supply conditions or accidental noise.
Power supply check
(indoor/outdoor unit)
Check of inspection display [In-
door/outdoor unit PCB, remote
controller or Indication board]
Check of unit
controller
(1)
Check of inspection display [In-
door/outdoor unit PCB, remote
controller or Indication board]
(3) Error diagnosis procedures at the indoor unit side
To diagnose the error, measure the voltage (AC, DC), resistance, etc. at each connector around the circuit board of indoor unit
based on the inspection display or the operation state of unit (no operation of compressor or blower, no switching of 4-way valve,
etc.) If any defective parts are discoverd, replace with the assembly of parts as shown below.
(a) Single-unit replacement parts for circuit board of indoor unit. (Peripheral electric parts for circuit board.)
Indoor unit printed circuit board, thermistor (return, heat exchanger), operating switches, limit switches, transformers, fuses.
Note (1) Use normal inspection methods to determine the condition of strong electrical circuits and frozen cycle parts.
(b) Replacement procedure of indoor unit microcomputer printed circuit board
Microcomputer printed circuit board can be replaced with following procedure.
(i) Confirm the parts numbers. (Refer to the following parts layout drawing for the location of parts number.)
Model
FDTA 151~401
FDTA 501, 601
FDE
Parts number
PJA505A122ZD
PJA505A122ZC
PJA505A128ZF
Model
FDKA 151~251
FDKA 301
FDUR
-
-
7
Parts number
PHA505A018ZF
PHA505A018ZG
PJA505A131ZC
Parts layout on the indoor unit PCB
Model: FDT series
To power supply PCB
(501, 601) (CNW9)
Fan motor
(501, 601)
Power supply PCB
(CNW8)
Connector
(CNT)
Address switch
(SW2)
Heat exchanger thermistor,
Return air thermistor
(Thi-R1, Thi-A)
CNT
CNM2
C13
CNW8
CNY
PC5
L1
C58
CNW9
C12
C1
IC2
IC3
C2
C3
IC9
CNI
Heat exchanger
thermistor
(Thi-R2)
CNM3
52X6 52X1 52X2 52X3
PC3
C4
SW2
CNH CNN1
IC12
X1
J8
J10
J9~J11
(SW10)
Fan motor
(151~401)
CNR
52X4
CNG
LED2
C5
SW10
J11
J12
1234
SW5
J5J6J7
LED1
ON
52X8-2
CNE
SW8
J8
SW7
J1J2J3
1234
C41
J4
ON
SW9
DIP switch
(SW5)
KN1
TVS1
J5~J6
(SW8)
CNV
IC8
IC11
F1
F2
J1~J4
(SW7)
DIP switch
(SW9)
Z2D
52X7
To power supply
(CNW7)
L2
R17
IC7
D2
ZD1
R16
CNJ
Remote
controller
Louver motor
CNW7
C23
TM1
52X8-1
PC2 PC1
C11
CNB
Z3D
Z4D
Z5D
● Change by the jumper wire
Name Function
J1 (SW7-1)
J2 (SW7-2)
J3 (SW7-3)
J4 (SW7-4)
J5 (SW8-1)
J6 (SW8-2)
“None” means that jumper wire is not provided on the PCB or the
Note (1)
connection is cut
The replacement board is not equipped with jumpers J1 ~ J6. Instead,
(2)
SW7 and 8, with the same functions as jumpers J1~J6, are used in the
position where the jumpers were previously. Set SW7 and 8 locally in
accordance with the above table.
With
Input signal - Reverse invalid
(1)
None
Input signal - Rus stop
With
Heating thermostat OFF-Lo
(1)
None
Heating thermostat OFF-Stop, Lo
With
Normal operation operable
(1)
None
Operation permission prohibited
With
Normal
(1)
None
Heating temp. +3
With
Louver free stop control - Invalid
(1)
None
Louver free stop control - Effective
With
Freeze prevention fan control activated.
(1)
None
Freeze prevention fan control deactivated.
● Control change switch (SW5, SW9, SW10)
Function of DIP switch SW5 (Usually all turned OFF)
Switch Function
ON
SW5-4SW5-3
OFF
Setting time : 1000hrs. (Unit stop)
ON
Setting time : 1000hrs. (Display)
OFF
Setting time : 600hrs. (Display)
ON
Setting time : 180hrs. (when shipped from factory)
OFF
Function of DIP switch SW9 (Usually all turned OFF)
Switch Function
SW9-3
SW9-4
Note (1) It is normally ON only in the case of SW9-4.
Emergency operation
ON
Normal
OFF
Fan control : Powerful mode
ON
Fan control : Mild mode
OFF
Function of DIP switch SW10 (Usually all turned OFF)
SW10-1 (J9)
SW10-2
(J10)
Switch Function
OFF
SW10-3
(J11)
ON
Auto swing fanction - None
OFF
Auto swing function - With
ON
Remote controller air flow –
OFF
Remote controller air flow 1 speed
ON
Remote controller air flow 2 speed
OFF
Remote controller air flow 3 speed
ON
-
-
8
Model: FDEN series
Fan motor
CNJ2CNM3CNRCNV
PCB power supply connector
(Primary side)
Power supply
L2
CNW1
52X5
52X352X252X252X652X4
CNW0
CNM1
L3
F1
ZNR
L1
IC8IC7
PCB power supply
connector
(Secondary side)
Remote controller
52X8-2
52X8-1
KN1
52X7
C57
CNQ CNT
Connector
(CNT)
Heat exchanger thermistor,
Return air thermistor
(Thl-R1, Thl-A)
● Change by the jumper wire
Name Function
J1 (SW7-1)
J2 (SW7-2)
J3 (SW7-3)
J4 (SW7-4)
J5 (SW8-1)
J6 (SW8-2)
“None” means that jumper wire is not provided on the PCB or the
Note (1)
connection is cut
The replacement board is not equipped with jumpers J1 ~ J6. Instead,
(2)
SW7 and 8, with the same functions as jumpers J1~J6, are used in the
position where the jumpers were previously. Set SW7 and 8 locally in
accordance with the above table.
With
Input signal - Reverse invalid
(1)
None
Input signal - Rus stop
With
Heating thermostat OFF-Lo
(1)
None
Heating thermostat OFF-Stop, Lo
With
Normal operation operable
(1)
None
Operation permission prohibited
With
Normal
(1)
None
Heating temp. +3
With
Louver free stop control - Invalid
(1)
None
Louver free stop control - Effective
With
Freeze prevention fan control activated.
(1)
None
Freeze prevention fan control deactivated.
CNE
LED1
LED2
CNB CNW2
DIP switch
(SW5)
SW2 SW5
CNH CNN1
SW8
SW7SW9SW10
J5, J6
(SW8)
J1~J4
(SW7)
DIP switch
Address switch
(SW2)
J9~J11
(SW10)
(SW9)
Heat exchanger thermistor
(Thl-R2)
● Control change switch (SW5, SW9, SW10)
Function of DIP switch SW5 (Usually all turned OFF)
Switch Function
ON
SW5-4SW5-3
OFF
Setting time : 1000hrs. (Unit stop)
ON
Setting time : 1000hrs. (Display)
OFF
Setting time : 600hrs. (Display)
ON
Setting time : 180hrs. (when shipped from factory)
OFF
Function of DIP switch SW9 (Usually all turned OFF)
Switch Function
SW9-3
SW9-4
Note (1) It is normally ON only in the case of SW9-4.
Emergency operation
ON
Normal
OFF
Fan control : Powerful mode
ON
Fan control : Mild mode
OFF
Function of DIP switch SW10 (Usually all turned OFF)
SW10-1 (J9)
SW10-2
(J10)
Switch Function
OFF
SW10-3
(J11)
ON
Auto swing fanction - None
OFF
Auto swing function - With
ON
Remote controller air flow –
OFF
Remote controller air flow 1 speed
ON
Remote controller air flow 2 speed
OFF
Remote controller air flow 3 speed
ON
-
-
9
Model: FDKN series
This diagram shows the PCB for the 151~251. The component layout on the 301 PCB is different, but the functions are the
same.
Heat exchanger thermistor,
Dip switch
(SW5)
J9~J11
(SW10)
Dip switch
(SW9)
J5~J8
(SW8)
J1~J4(SW7)
Adress switch
(SW2)
CNZ
SW10
J10
J11
J9
SW8
J5J6J7
J8
SW2
IC9 IC10
LED1
SW5
SW9
J1J2J3
CNE
CNH
IC11
C2
R62
BZ
Return air thermistor
(Thl-R1, Thl-A)
R17
L1
CNW1
CNM
Heat exchanger thermistor
J31
(Thl-R2)
CNN1
CNB
J31
J4
SW7
L4
CNL
C92
CNG
CNY CNJ
IC8
CNT
R16
L2
R151
C104
Remote controller
PCB power supply
connector
(Primary side)
PCB power supply
connector
(Secondary side)
TB,3
TB,2
TB,1
G
● Change by the jumper wire
Name Function
J1 (SW7-1)
J2 (SW7-2)
J3 (SW7-3)
J4 (SW7-4)
J5 (SW8-1)
J6 (SW8-2)
J8 (SW8-4)
“None” means that jumper wire is not provided on the PCB or the
Note (1)
connection is cut
The replacement board is not equipped with jumpers J1 ~ J8. Instead,
(2)
SW7 and 8, with the same functions as jumpers J1~J8, are used in the
position where the jumpers were previously. Set SW7 and 8 locally in
accordance with the above table.
With
Input signal - Reverse invalid
(1)
None
Input signal - Rus stop
With
Heating thermostat OFF-Lo
(1)
None
Heating thermostat OFF-Stop, Lo
With
Normal operation operable
(1)
None
Operation permission prohibited
With
Normal
(1)
None
Heating temp. +3
With
Louver free stop control - Invalid
(1)
None
Louver free stop control - Effective
With
Freeze prevention fan control activated.
(1)
None
Freeze prevention fan control deactivated.
With
Model 151~251
(1)
None
Model 301
Louver motor
(CNT)
Fan motorConnector
● Control change switch (SW5, SW9, SW10)
Function of DIP switch SW5 (Usually all turned OFF)
Switch Function
ON
SW5-4SW5-3
OFF
Setting time : 1000hrs. (Unit stop)
ON
Setting time : 1000hrs. (Display)
OFF
Setting time : 600hrs. (Display)
ON
Setting time : 180hrs. (when shipped from factory)
OFF
Function of DIP switch SW9 (Usually all turned OFF)
Switch Function
SW9-1
SW9-2
SW9-3
SW9-4
Note (1) It is normally ON only in the case of SW9-4.
Custom code - Change
OFF
Custom code - Normal
ON
Power failure security - Effective
OFF
Power failure security - Invalid
ON
Emergency operation
ON
Normal
OFF
Fan control : Powerful mode
ON
Fan control : Mild mode
OFF
Function of DIP switch SW10 (Usually all turned OFF)
SW10-1 (J9)
SW10-2
(J10)
Switch Function
OFF
SW10-3
(J11)
ON
Auto swing fanction - None
OFF
Auto swing function - With
ON
Remote controller air flow –
OFF
Remote controller air flow 1 speed
ON
Remote controller air flow 2 speed
OFF
Remote controller air flow 3 speed
ON
-
10
-
Model: FDUR series
Drain motor
CNT
Connector
(CNT)
Heat exchanger thermistor,
Return air thermistor
(Thl-R1, Thl-A)
Heat exchanger thermistor
(Thl-R2)
CNN1
CNH
CNV
CNO
Remote controller
CNF
CNN2
CNB
CNQ
Address swith
(SW2)
DIP switch
(SW5)
SW2 SW10
SW5 SW7
LED2
J10~J11
(SW10)
J6
(SW8)
DIP switch
(SW9)
J1~J4
Float switch
(SW7)
CNZ CNI
SW9SW8
CNO
52X5 52X4
CNJ2 CNR
L3L2
52X3
52X2 52X1 52X6
CNW1
CNM3
PCB power supply connector
(Primary side)
● Change by the jumper wire
Name Function
J1 (SW7-1)
J2 (SW7-2)
J3 (SW7-3)
J4 (SW7-4)
J6 (SW8-2)
“None” means that jumper wire is not provided on the PCB or the
Note (1)
connection is cut
The replacement board is not equipped with jumpers J1 ~ J4, J6.
(2)
Instead, SW7 and 8, with the same functions as jumpers J1~J4, J6, are
used in the position where the jumpers were previously. Set SW7 and 8
locally in accordance with the above table.
With
Input signal - Reverse invalid
(1)
None
Input signal - Rus stop
With
Heating thermostat OFF-Lo
(1)
None
Heating thermostat OFF-Stop, Lo
With
Normal operation operable
(1)
None
Operation permission prohibited
With
Normal
(1)
None
Heating temp. +3
With
Freeze prevention fan control activated
(1)
None
Freeze prevention fan control deactivated
LED1
L4
F1
L1
CNW0
CNE
CNG
Power supply
CNW2
PCB power supply connector
F2
CNK2CNK1
CNA
F3
(Secondary side)
● Control change switch (SW5, SW9, SW10)
Function of DIP switch SW5 (Usually all turned OFF)
Switch Function
ON
SW5-4SW5-3
OFF
Setting time : 1000hrs. (Unit stop)
ON
Setting time : 1000hrs. (Display)
OFF
Setting time : 600hrs. (Display)
ON
Setting time : 180hrs. (when shipped from factory)
OFF
Function of DIP switch SW9 (Usually all turned OFF)
Switch Function
SW9-3
SW9-4
Emergency operation
ON
Normal
OFF
Fan control : High speed (High Ceiling)
ON
Fan control : Standard
OFF
-
11
Function of DIP switch SW10 (Usually all turned OFF)
Switch Function
(J10)
OFF
ON
SW10-3
(J11)
SW10-2
Remote controller air flow –
OFF
Remote controller air flow 1 speed
ON
Remote controller air flow 2 speed
OFF
Remote controller air flow 3 speed
ON
-
(c) Check method when the error code is display
Remote controller or Indication board: Inspection LED, error code
Indoor unit PCB: Red LED (inspection display), Green LED (CPU. normal display)
Outdoor unit PCB: ARed LED (inspection display), Green LED (CPU. normal display)
Error display : No display
1
LCD display : No display
[Power supply line error]
Indoor unit
Red LED
Green LED
Note (1) The green LED in the outdoor unit is used in the FDCA301 ~ 601 models only.
Stays OFF
Stays OFF
Red LED
Green LED
Outdoor unit
Start
Is the voltage
between 1 and 2/N of the indoor
unit’s terminal block
AC220/240V?
YES
NO YES
Voltage between
1 and 2/N of the outdoor unit’s
terminal block is
AC220/240V.
NO
Outdoor unit check
Fuse
OK?
YES
Is the voltage at
CNW3 or 10
(1)
transformer’s secondary side
(red – red) on the
14 V or higher?
YES
NO NO
NO
Disconnect the transformer’s primary side
(CNW1) and measure the resistance on
both ends of CNW1 (using a tester, etc.).
Notes (1) In models other than FDT, replace the fuse.
(2) FDT only
Transformer exchange
Note (1) In models other than FDT, it is CNW2.
Stays OFF
Stays OFF
Control lines connected
wrong or disconnected.
Several 10K Ω or higher.
YES
Fuse exchange
Replacement indoor unit
power supply PCB
Is the voltage
between CNW5 2 and 3
DC 12V?
YES
Is the voltage
between CNW8 2 and 3
DC 12V?
YES
Does it return
to normal when the power
supply is reset?
NO
Replacement indoor unit
control PCB
(1)(2)
(1)(2)
NO
NO
YES
Replacement indoor unit
power supply PCB
Note (1) 3 is GND
Harness disconnection
Unit is normal.
(Malfunction was due to noise, etc.)
-
-
12
Indoor unit
Red LED 3 time flash
Green LED
Note (1) The green LED in the outdoor unit is used in the FDCA301 ~ 601 models only.
Keeps flashing
Red LED Stays OFF
Green LED
Outdoor unit
Keeps flashing
Remote
controller wiring
connect check (Red·
White·Black)
OK
Approximately
(1)
10 ~ 11 V between
X and Z.
Note (1) Z is GND.
NO
Remote controller wire
is removed
YES
Remeasure
between X~Z.
10~11V.
NO
(2)
Is the voltage
between CNW8 1-3
12V?
YES
NO
YES
YES
Remote controller wire short circuit?
Remote controller defective
NO
Note (2) 3 is GND.
Correction
Power supply reset
Check the
CNW5-8 harness.
NG
Harness exchange
OK
Normal?
NO
YES
Maltifunction by
accidental noise
Only case of FDT
Replacement indoor unit power
supply PCB
Remote controller wire
disconnection?
Remote controller defective
Replacement indoor
unit control PCB
-
13
-
Loading...