Mitsubishi Heavy Industries FDT200VSAPVF1 User manual

SERVICE MANUAL
Manual No.'14•PAC-SM-215
MICRO INVERTER PACKAGED
AIR-CONDITIONERS
(Split system, air to air heat pump type)
CEILING CASSETTE-4WAY TYPE CEILING CASSETTE-4WAY COMPACT TYPE
DUCT CONNECTED-HIGT STATIC PRESSURE TYPE
DUCT CONNECTED-LOW/MIDDLE STATIC PRESSURE TYPE
FLOOR STANDING TYPE
CEILING SUSPENDED TYPE
V Multi System
Twin type
FDT200VSAPVF1
250VSAPVF
Twin type
FDEN200VSAPVF1
250VSAPVF
Twin type
FDUM200VSAPVF1
250VSAPVF
Twin type
FDF200VSAPVD1
250VSAPVD
(OUTDOOR UNIT)
FDC200VSA
250VSA
(INDOOR UNIT)
FDT50VF
60VF
71VF1
100VF1
125VF
FDEN50VF
60VF
71VF1
100VF1
125VF
Double twin type
FDT200VSADVF
250VSADVF
Double twin type
FDEN200VSADVF
250VSADVF
Double twin type
FDTC200VSADVF
250VSADVF
Single type
FDU200VSAVG
250VSAVG
Triple type
FDT200VSATVF1
Triple type
FDEN200VSATVF1
Triple type
FDUM200VSATVF1

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1. OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER .................. 4
1.1 Remote control ........................................................................................ 4
1.2 Operation control function by the wired remote control
1.3 Operation control function by the indoor control ................................ 10
..................... 7
(1) Auto operation ....................................................................................... 10
(2) Operations of functional items during cooling/heating .......................... 11
CONTENTS
(4) Timer operation ..................................................................................... 12
(5) Remote control display during the operation stop ................................. 13
(6) Hot start (Cold draft prevention at heating) ............................................ 13
(7) Hot keep ................................................................................................ 13
(8) Auto swing control ................................................................................. 14
...................................................... 17
(9) Thermostat operation ............................................................................ 15
(10) Filter sign ............................................................................................... 16
................................................. 16
(13) Drain pump abnormalities detection
(11) Compressor inching prevention control
(12) Drain pump control ................................................................................ 17
(3) Dehumidifying operation ........................................................................ 11
.................................................................. 18
.......................... 17
(16) Heating overload protection
(14) Operation check/drain pump test run operation mode
(15) Cooling, dehumidifying frost protection ................................................. 18
................................................................................ 19
....................................................................... 18
(19) High ceiling control
(17) Anomalous DC fan motor
(18)
Plural unit control - Control of 16 units group by one remote control ......... 19
......................................... 20
...... 20
(21) External input/output control (CnT or CnTA)
(20)
Abnormal temperature thermistor (retun air/indoor heat exchanger) wire/short-circuit detection
(22) Operation permission/prohibition .......................................................... 22
.............................. 23(23) Selection of cooling/heating external input function
................................................... 24
............................................................... 24
(26) Return air temperature compensation
(24) Fan control at heating startup
(25)
Room temperature detection temperature compensation during heating ........ 24
................................................. 24(27) High power operation (RC-EX1A only)
............................................ 25(28) Energy-saving operation (RC-EX1A only)
......................................................... 25(29) Warm-up control (RC-EX1A only)
....................................................... 25(30) Home leave mode (RC-EX1A only)
....................................................... 25(31) Auto temp. setting (RC-EX1A only)
.............................................. 25(32) Fan circulator operation (RC-EX1A only)
........ 25(33)
The operation judgment is executed every 5 minutes (RC-EX1A only)
................................................ 25(34) Auto fan speed control (RC-EX1A only)
.......................................... 25(35) Indoor unit overload alarm (RC-EX1A only)

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............................... 26
2. MAINTENANCE DATA ..................................................................................... 36
2.1 Diagnosing of microcomputer circuit .................................................... 36
(1) Selfdiagnosis function ............................................................................ 36
(2) Troubleshooting procedure .................................................................... 39
(3) Troubleshooting at the indoor unit ........................................................ 39
(4) Troubleshooting at the outdoor unit ...................................................... 49
(5) Check of anomalous operation data with the remote control ................ 55
(6)
Power transistor module (including the driver PCB) inspection procedure ...... 57
(7) Inverter checker for diagnosis of inverter output ................................... 58
(8) Outdoor unit control failure diagnosis circuit diagram .......................... 59
................................................................................ 61
(1) List of troubles ....................................................................................... 61
(2) Troubleshooting .................................................................................... 62
2.2 Troubleshooting flow
3. ELECTRICAL WIRING ..................................................................................... 111
(1) Indoor units ............................................................................................ 111
(2) Outdoor units .........................................................................................119
1.4 Operation control function by the outdoor control
(1) Determination of comressor speed (frequency) .......................................26
(2) Compressor start control ..........................................................................26
(3) Compressor soft start control ...................................................................27
(4) Outdoor unit fan control ............................................................................27
(5) Defrosting .................................................................................................29
(6)
Protective control/anomalous stop control by compressor,s number of revolutions ..........30
(7) Silent mode .............................................................................................34
(8) Test run .....................................................................................................34
(9) Pump-down control ...................................................................................34
...........................................35(10) Base heater ON/OFF output control (option)
......................................................................................126
5. APPLICATION DATA
4. PIPING SYSTEM ..............................................................................................121
5.1 Installation of indoor unit ........................................................................126
(1) Ceiling cassette-4way type (FDT) .........................................................126
........................................157
(7) Effective range of cool/hot wind (Reference)
5.2 Electric wiring work installation ..............................................................158
5.4 Installation of outdoor unit ......................................................................180
5.5 Method for connecting the accessory pipe ............................................188
(1) FDT, FDTC, FDEN, FDU, FDUM series .................................................158
(2) FDF series ..............................................................................................162
5.6 Instructions for branching pipe set (DIS-WA1,WB1,TA1,TB1) ..............192
5.3 Installation of wired remote control (option) ..........................................166
(3) Ceiling suspended type (FDEN) ............................................................139
(2) Ceiling cassette-4way compact type (FDTC) .........................................133
(5) Duct connected-Low / Middle static pressure type (FDUM) ..................148
(4) Duct connected-High static pressure type (FDU) .................................143
(6) Floor standing type (FDF) .....................................................................153

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How to read the model name
FDT : Ceiling cassette-4way type
FDF : Floor standing type
FDTC : Ceiling cassette-4way compact type
FDEN : Ceiling suspended type
FDU : Duct connected-High static pressure type
FDUM : Duct connected-Low/Middle static pressure type
Example: FDT 200 VSA P VF1
Series code
P : Twin type
: Single type
T : Triple type
D : Double-twin type
Applicable power source...See the specification
Product capacity
Model name
FDC : Outdoor unit
(blank)
............................... 26
2. MAINTENANCE DATA ..................................................................................... 36
2.1 Diagnosing of microcomputer circuit .................................................... 36
(1) Selfdiagnosis function ............................................................................ 36
(2) Troubleshooting procedure .................................................................... 39
(3) Troubleshooting at the indoor unit ........................................................ 39
(4) Troubleshooting at the outdoor unit ...................................................... 49
(5) Check of anomalous operation data with the remote control ................ 55
(6)
Power transistor module (including the driver PCB) inspection procedure ...... 57
(7) Inverter checker for diagnosis of inverter output ................................... 58
(8) Outdoor unit control failure diagnosis circuit diagram .......................... 59
................................................................................ 61
(1) List of troubles ....................................................................................... 61
(2) Troubleshooting .................................................................................... 62
2.2 Troubleshooting flow
3. ELECTRICAL WIRING ..................................................................................... 111
(1) Indoor units ............................................................................................ 111
(2) Outdoor units .........................................................................................119
1.4 Operation control function by the outdoor control
(1) Determination of comressor speed (frequency) .......................................26
(2) Compressor start control ..........................................................................26
(3) Compressor soft start control ...................................................................27
(4) Outdoor unit fan control ............................................................................27
(5) Defrosting .................................................................................................29
(6)
Protective control/anomalous stop control by compressor,s number of revolutions ..........30
(7) Silent mode .............................................................................................34
(8) Test run .....................................................................................................34
(9) Pump-down control ...................................................................................34
...........................................35(10) Base heater ON/OFF output control (option)
......................................................................................126
5. APPLICATION DATA
4. PIPING SYSTEM ..............................................................................................121
5.1 Installation of indoor unit ........................................................................126
(1) Ceiling cassette-4way type (FDT) .........................................................126
........................................157
(7) Effective range of cool/hot wind (Reference)
5.2 Electric wiring work installation ..............................................................158
5.4 Installation of outdoor unit ......................................................................180
5.5 Method for connecting the accessory pipe ............................................188
(1) FDT, FDTC, FDEN, FDU, FDUM series .................................................158
(2) FDF series ..............................................................................................162
5.6 Instructions for branching pipe set (DIS-WA1,WB1,TA1,TB1) ..............192
5.3 Installation of wired remote control (option) ..........................................166
(3) Ceiling suspended type (FDEN) ............................................................139
(2) Ceiling cassette-4way compact type (FDTC) .........................................133
(5) Duct connected-Low / Middle static pressure type (FDUM) ..................148
(4) Duct connected-High static pressure type (FDU) .................................143
(6) Floor standing type (FDF) .....................................................................153

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⑤LCD display (With backlight)
④Operation lamp
This lamp lights in green (yellow-green) during
operation. It changes to red if any error occurs.
⑥USB port (mini-B)
USB connector (mini-B) allows connecting to a
personal computer.
For operating methods, refer to the instruction
manual attached to the software for personal
computer (eco-touch remote control RC-EX1,
utility software).
②switch (High Power switch)
Pushing this button starts the high power
operation.
A tap on the LCD lights the backlight.
The backlight turns off automatically if there is no
operation for certain period of time.
Lighting period of the backlight lighting can be
changed.
If the backlight is ON setting, when the screen
is tapped while the backlight is turned off, the
backlight only is turned on.(Operations with
switches ①,②and ③are excluded.)
③switch (Energy Saving switch)
Pushing this button starts the energy-saving
operation.
⑬Fan speed change button
Displays the fan speed which is selected currently.
Tap this button to change the fan speed.
⑨Menu button
When setting or changing other than the following
⑩-⑭, tap the menu button.When menu items are
displayed, select one and set.
⑫Flap direction button
Displays the flap direction which is selected currently.
Tap this button to change the flap direction.
⑦Clock, R/C name display
Displays the current time and
the name of R/C
⑪Change set temp button
Displays the temperature which
is set currently.Tap this button
to change the set temperature.
⑩Change operation mode button
Displays the operation mode which
is selected currently. Tap this button
to change the operation mode.
⑭Timer button
Displays simplified contents of the
timer which is set currently.
(When two or more timers are set,
contents of the timer which will be
operated immediately after is
displayed.)
Tap this button to set the timer.
①switch (Run/Stop switch)
One push on the button starts operation
and another push stops operation.
⑧Icon display
Each icon is displayed when one of following settings
is going on.(It is referring to the following figure for
details.)
⑮Message display
Status of air-conditioner operation and messages of
the R/C operations etc.are displayed.
When the demand control
is effective.
When setting is made
from the sub R/C.
When the central control
(Option) is running.
When the periodical
inspection is necessary.
During the ventilation
operation
When ”filter sign” is up.
When the Permission/
Prohibition setting is made.
When the peak-cut timer is setWhen the weekly timer
is set.
⑧Icon display
Each icon is displayed when one of following settings is going on.
Touch panel system, which is operated by tapping the LCD screen with a finger, is employed for any operations
other than the ①Run/Stop, ②High power and ③Energy-saving switches.
All icons are shown for the sake of explanation.
Model RC-EX1A
1. OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER
1.1 Remote control
(1) Wired remote control

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(1) Wired remote control
Model RC-E5
The figure below shows the remote control with the cover opened. Note that all the items that may be displayed in
the liquid crystal display area are shown in the figure for the sake of explanation
Characters displayed with dots in the liquid crystal display area are abbreviated.
＊ All displays are described in the liquid crystal display for explanation.
The figure below shows the remote control with the cover opened.
Ventilaion display
Displayed during ventilation operation
Central control display
Displayed when the air-conditioning system is
controlled by centralized remote control.
Timer operation display
Displays the timer operation setting.
Temperature setting buttons
These buttons are used to set the
temperature of the room.
Timer button
This button is used to set
the timer mode.
Timer setting buttons
These buttons are used to set
the timer mode and the time.
ESP button
This button is used to
select the auto static
pressure adjustment mode.
Cover
AIR CON No. button
Display the indoor unit number connected to this
remote control.
CHECK button
This button is used at servicing.
TEST button
This button is used during test operation.
Weekly timer display
Displays the settings of the
weekly timer.
Operation setting display area
Displays setting temperature, airflow
volume, operation mode and oparation
message.
Operation/check indicator light
During operation : Lit in green
In case of error: Flashing in red
Operation/stop button
This button is used to operate and stop
the air-conditioning system.
Press the button once to operate the
system and press it once again to stop
the system.
MODE button
This button is used to change the
operation mode.
FAN SPEED button
This button is used to set the airflow
volume.
VENT button
This button is used to operate external
ventilator.
LOUVER button
This button is used to operate/stop the
swing louver.
SET button
●This button is used to fix the setting.
●This button is used to set the silent mode.
RESET button
●If you press this button while making settings, you can go back to the
previous operation.
●This button is also used to reset the "FILTER CLEANING" display.
(Press it after cleaning the air filter)

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(2) Wireless remote control
* All displays are described in the liquid crystal display for explanation
Indication section
Operation section
Indicates set temperature. Indicates the status of swing louver.
Indicates selected operation with .
Indicates for two seconds when FILTER
button is pressed.
Indicates when OFF-TIMER is set.
Indicates OFF-TIMER setting time. Indicates the
current time when the OFF-TIMER is not set.
When this is pressed once, the unit starts to
operate and when this is pressed once again,
it stops operating.
Used to swing the louver.
Every time this button is pressed, displays switch
as below.
Sets room temperature by pressing or button.
Sets time when setting the time.
Used to cancel the TIMER SETTINGS.
Used to reset the microcomputer.
Indicates the selected airflow volume
Indicates when ON-TIMER is set.
Indicates the ON-TIMER setting time.
Nothing displayed when ON-TIMER is
not set.
Sends signal to the air-conditioner.
Every time this button is pressed, the mode is
switched as below.
Used to reset (turn off) the filter sign.
Press the button only after completing
the filter cleaning.
Sets ON TIMER operation.
Sets OFF TIMER operation.
Sets current time.

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Cooling Fan
Dry Heating
Auto
(1) Switching sequence of the operation mode switches of remote control
(a) Tap the change operation mode button on the TOP screen.
(b) When the change operation mode screen is displayed, tap the button of desired mode.
(c) When the operation mode is selected, the display returns to the TOP screen.
Icons displayed have the following meanings.
Notes(1) Operation modes which cannot be selected depending on combinations of indoor unit and
outdoor unit are not displayed.
Notes(2) When the Auto is selected, the cooling and heating switching operation is
performed automatically according to indoor and outdoor temperatures.
(2) CPU reset
Reset CPU from the remote control as follows.
(3) Power failure compensation function (Electric power source failure)
Enable the Auto-restart function from the remote control as follows.
①Tap the Menu button
on the TOP screen.
②,③ Main menu screen is displayed.
Tap the “Service & Maintenance” on the menu screen.
④Display the service
password input screen.
Enter the service password
(4-digit number).
①TOP screen ②Menu screen 1 ③Menu screen 3 ④Service password input
①Tap the Menu button
on the TOP screen.
②,③ Main menu screen is displayed.
Tap the “Service & Maintenance” on the menu screen.
④Display the service
password input screen.
Enter the service password
(4-digit number).
①TOP screen ②Menu screen 1 ③Menu screen 3 ④Service password input
⑤
Service & maintenance menu 1
⑥ Service & maintenance menu 2
⑤,⑥ Service & maintenance menus are displayed.
⑦Special settings
⑦Special settings
CPU reset : Microcomputers of IU
and OU connected are reset
(State of restoration after
power failure).
⑧CPU reset
All microcomputers on the R/C operated,
other R/Cs, IUs and OUs are reset (State
of restoration after power failure).
Tap [Yes] to reset CPU
⑤,⑥,⑦Display the R/C setting menu screens.
⑤R/C setting menu 1 ⑥R/C setting menu 2 ⑦R/C setting menu 3 ⑱Auto-restart
Enable : It returns to the state be fore the power
source failure as soon as the power is
restored (After the end of the primary
control at the power on).
Disable : It stops after the restoration of power
source, regardless the state of operation
before the power failure.
⑱Auto-restart
Set the state of operation to be started when the
power source is restored after a power failure.
⑧CPU reset
CPUreset
Restartafterreset
IfOK,
 tap ［ Set. ］
Model RC-EX1A
1.2 Operation control function by the wired remote control

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• Since it memorizes always the condition of remote control, it starts operation according to the contents of memory no
sooner than normal state is recovered after the power failure. Although the auto swing stop position and the timer mode are
cancelled, the weekly timer setting is restored with the holiday setting for all weekdays.
After recovering from the power failure, it readjusts the clock and resets the holiday setting for each weekday so that the
setting of weekly timer becomes effective.
• Content memorized with the power failure compensation are as follows.
Note (1) Items (f), (g) and (h) are memorized regardless whether the power failure compensation is effective or not while the setting of silent mode is cancelled
regardless whether the power failure compensation is effective or not.
(a) At power failure – Operating/stopped
If it had been operating under the off timer mode, sleep timer mode, the state of stop is memorized. (Although the
timer mode is cancelled at the recovery from power failure, the setting of weekly timer is changed to the holiday
setting for all weekdays.)
(b) Operation mode
(c) Airowvolumemode
(d) Room temperature setting
(e) Louver auto swing/stop
However, the stop position (4-position) is cancelled so that it returns to Position (1).
(f) “Remote control function items” which have been set with the remote control function setting (“Indoor function
items” are saved in the memory of indoor unit.)
(g) Upper limit value and lower limit value which have been set with the temperature setting control
(h) Sleep timer and weekly timer settings (Other timer settings are not memorized.)

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Model RC-E5
(1) Switching sequence of the operation mode switches of remote control
$29 #//, &!. (%!4 !54/
(2) CPU reset
This functions when “CHECK” and “ESP” buttons on the remote control are pressed simultaneously. Operation is same as that
of the power source reset.
(3) Power failure compensation function (Electric power source failure)
• This becomes effective if “Power failure compensation effective” is selected with the setting of remote control function.
• Since it memorizes always the condition of remote control, it starts operation according to the contents of memory no
sooner than normal state is recovered after the power failure. Although the auto swing stop position and the timer mode are
cancelled, the weekly timer setting is restored with the holiday setting for all weekdays.
After recovering from the power failure, it readjusts the clock and resets the holiday setting for each weekday so that the
setting of weekly timer becomes effective.
• Content memorized with the power failure compensation are as follows.
Note (1) Items (f), (g) and (h) are memorized regardless whether the power failure compensation is effective or not while the setting of silent mode is cancelled
regardless whether the power failure compensation is effective or not.
(a) At power failure – Operating/stopped
If it had been operating under the off timer mode, sleep timer mode, the state of stop is memorized. (Although the
timer mode is cancelled at the recovery from power failure, the setting of weekly timer is changed to the holiday
setting for all weekdays.)
(b) Operation mode
(c) Airowvolumemode
(d) Room temperature setting
(e) Louver auto swing/stop
However, the stop position (4-position) is cancelled so that it returns to Position (1).
(f) “Remote control function items” which have been set with the remote control function setting (“Indoor function
items” are saved in the memory of indoor unit.)
(g) Upper limit value and lower limit value which have been set with the temperature setting control
(h) Sleep timer and weekly timer settings (Other timer settings are not memorized.)
[Parts layout on remote control PCB]
XY
SW2
SW1
A
B
M
S
親
子
SW1
SW2
Master/ slave setting when more than one remote controls are used
A maximum of two remote controls can be connected to one indoor unit (or one group of indoor units.)
Remote control cord (no polarity)
Remote control
SW1 "Master"
Switch Setting Contents
M Master remote control
SW1 S Slave remote control
Remote control
SW1 "Slave"
Indoor units
Note (1) Don’t change SW2 because it is not used normally.
Caution
When using multiple remote controls, the following dispiays or settings
cannot be done with the slave remote control. It is available only with
the master remote control.
Louver position setting (set upper or lower limit of swinging range)
Setting indoor unit functions
Setting temperature range
Operation data display
Error data display
Silent mode setting
Test operation of drain pump
Remote control sensor setting