Mitsubishi Electric TRANE CITY MULTI TPMFYP006BM140F Operating manual

SERVICE MANUAL (OCBT341)
R410A
Indoor unit
[Model Name]
INDOOR UNIT
TPMFYP006BM140F
TPMFYP008BM140F
TPMFYP012BM140F
TPMFYP015BM140F
TECHNICAL & SERVICE MANUAL
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
April 2019
No. OCHT341
CONTENTS
1. FEATURES ...........................................2
2. PART NAMES AND FUNCTIONS........2
3. SPECIFICATION...................................9
4. OUTLINES AND DIMENSIONS .........13
5. WIRING DIAGRAM.............................14
6. REFRIGERANT SYSTEM DIAGRAM ...15
7. MICROPROCESSOR CONTROL ...... 16
8. TROUBLESHOOTING.........................23
9. DISASSEMBLY PROCEDURE............31
Grille model
[Model Name]
TMP-16BMUW

2
OCHT341
1FEATURES
PART NAMES AND FUNCTIONS
2
1. Fresh Air Intake
Air recycled indefinitely can become stale and stagnant with air quality suffering significantly. Fresh air is
the answer and it is for this reason that the TPMFY - series takes in air directly from outdoors. This fresh air
intake allows you to enjoy the comfort of crisp, refreshing air in the confines of your living or working space.
2. Light and Compact
The main unit weighs only 31 lb. and the panel merely 7 lb. This makes the TPMFY - series one of the light-
est in the industry. The unit size is also quite small, having been standardized to a strikingly compact 33-5/8
inch. All of this make the chore of installation and maintenance that much simpler and easier.
Models Cooling capacity / Heating capacity
TPMFYP006BM140F 6,000 / 6,700 Btu/h
TPMFYP008BM140F 8,000 / 9,000 Btu/h
TPMFYP012BM140F 12,000 / 13,500 Btu/h
TPMFYP015BM140F 15,000 / 17,000 Btu/h
Guide vane
Airflow can be changed to horizontal
by moving the guide vane to the left or right.
Air intake
Returns air from room.
Filters
Remove dust and pollutants
from return air.
Auto Air Swing Vane
Disperses airflow up and
down and adjusts the angle
of airflow direction.
Horizontal Air Outlet
2-1. Indoor Unit
Indoor Unit
Use the specied refrigerant only
Never use any refrigerant other than that specied.
Doing so may cause a burst, an explosion, or re when the unit is being used, serviced, or disposed of.
Correct refrigerant is specied 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.

3
OCHT341
2-2. Wired Remote Controller <TAR-40MAA>
Function buttons
MENU
ON
OFF
RETURN SELECT
HOLD
When the backlight is off, pressing any button turns the backlight on
and does not perform its function. (except for the [ON/OFF] button)
The functions of the function buttons change depending on the
screen.
Refer to the button function guide that appears at the bottom of
the LCD for the functions they serve on a given screen.
When the system is centrally controlled, the button function
guide that corresponds to the locked button will not appear.
Press to turn ON/OFF the indoor unit.
This lamp lights up in green while the unit is in operation. It blinks
while the remote controller is starting up or when there is an error.
1[ON/OFF] button 6ON/OFF lamp
Press to save the setting.
When the Main menu is displayed, pressing this button will
enable/disable the HOLD function.
Main display: Press to change the operation mode.
Menu screen: The button function varies with the screen.
2 [SELECT/HOLD] button
7 Function button [F1]
Press to return to the previous screen. Main display: Press to decrease temperature.
Main menu: Press to move the cursor left.
Menu screen: The button function varies with the screen.
3[RETURN] button 8Function button [F2]
4[MENU] button
9Function button [F3]
Press to bring up the Main menu.
Main display: Press to increase temperature.
Main menu: Press to move the cursor right.
Menu screen: The button function varies with the screen.
Operation settings will appear.
When the backlight is off, pressing any button turns the
backlight on and it will stay lit for a certain period of time de-
pending on the screen.
Main display: Press to change the fan speed.
Menu screen: The button function varies with the screen.
5Backlit LCD
0Function button [F4]
83
83
Fri
Room
Set temp.
Mode Temp. Fan
Cool Auto
Main Main menu
Energy saving
Main display:
Cursor
Operation
Vane·Louver·Vent. (Lossnay)
High power
Comfort
Main menuMain display
Menu screen
7 8 9 0
7 8 9 0
7 8 9 0
Function guide
Controller interface

4
OCHT341
The main display can be displayed in two different modes: “Full” and “Basic”. The initial setting is “Full”. To switch to the “Basic”
mode, change the setting on the Main display setting. (Refer to operation manual included with remote controller.)
<Full mode> <Basic mode>
All icons are displayed for explanation.
Most settings (except ON/OFF, mode, fan speed, temperature) can be made from the Main menu.
1Operation mode
2Preset temperature
3Clock
4Fan speed
Functions of the corresponding buttons appear here.
5Button function guide
Appears when the ON/OFF operation is centrally controlled.
Appears when the operation mode is centrally controlled.
Appears when the preset temperature is centrally controlled.
Appears when the lter reset function is centrally controlled.
Indicates when lter needs maintenance.
1Room temperature
Appears when the buttons are locked.
Appears when the Weekly timer is enabled.
Appears while the units are operated in the energy saving
mode. (Will not appear on some models of indoor units)
Appears when the built-in thermistor on the remote control-
ler is activated to monitor the room temperature (1).
appears when the thermistor on the indoor unit is acti-
vated to monitor the room temperature.
Appears when an energy saving operation is performed us-
ing a “3D i-see Sensor” function.
Indicates the louver setting.
Indicates the ventilation setting.
Appears when the preset temperature range is restricted.
Indicates the vane setting.
6
7
8
9
0
2
4
5
7
8
9
)
!
Fri
Mode Temp. Fan
Room
Cool Set temp. Auto
83
83
1
2
3
4
5
6
78
90
1
2 34 5 6 7 8
9
)
@
!
#
$
Display
Appears when the On/Off timer or Auto-off timer function is enabled.
3
appears when the timer is disabled by the centralized control system.
appears when the HOLD function is enable.
6
Appears while the outdoor units are operated in the silent mode.
@
Appears for a certain period of time when a centrally-con-
trolled item is operated.
#Centrally controlled
An check code appears during the preliminary error.
$Preliminary error display
Fri
Cool
Mode Temp. Fan
Set temp. Auto
$
83
5
4
3
2
1
#

5
OCHT341
Not all functions are available on all models of indoor units.
Energy saving
Main menu Press the MENU button.
Move the cursor to the desired item with the F1 and F2 buttons, and press the SELECT button.
Operation
Initial setting menu
Manual vane angle
ON/OFF timer
Auto return
Clock
Main/Sub
Temp. range
Auto-OFF timer
Schedule
Daylight saving time
Clock
Administrator password
Operation locked
3D i-see Sensor
High power
Vane · Louver · Vent. (Lossnay)
Comfort
Timer
Energy saving
Basic setting
Display setting
Operation setting
Restriction
Weekly timer
OU silent mode
Black and white inversion setting
Timer menu
Main display
Display details
Contrast • Brightness
Language selection
Auto mode
Setback mode
Continue to the next page.

6
OCHT341
Maintenance menu
Service menu
Drain pump test run
Serial No. input
Lossnay
Diagnosis
Initialize remote controller
Remote controller information
Initialize maintenance info.
Test run
Model name input
Function setting
Error history
Maintenance password
Dealer information input
Error information
Test run menu
Maintenance information
Filter information
Cleaning
Settings menu
Check menu
Other menu
Auto descending panel
Descending operation
Self check
Descending adjustment
Remote controller check
Continue from the previous page.
Not all functions are available on all models of indoor units.

7
OCHT341
Main menu list
Continue to the next page.
*1Clock setting is required.
*233.8°F (1°C) increments.
Main
menu Setting and display items Setting details
Operation Vane · Louver · Vent.
(Lossnay)
Use to set the vane angle.
• Select a desired vane setting from 5 different settings.
Use to turn ON/OFF the louver.
• Select a desired setting from "ON" and "OFF."
Use to set the amount of ventilation.
• Select a desired setting from "Off," "Low," and "High."
High power Use to reach the comfortable room temperature quickly.
• Units can be operated in the High-power mode for up to 30 minutes.
Comfort Manual
vane angle
Use to x each vane angle.
3D i-see Sensor Use to set the following functions for 3D i-see Sensor.
• Air distribution • Energy saving option • Seasonal airow
Timer Timer ON/OFF timer *1Use to set the operation ON/OFF times.
• Time can be set in 5-minute increments.
Auto-Off
timer
Use to set the Auto-Off time.
• Time can be set to a value from 30 to 240 in 10-minute increments.
Weekly timer *1, *2Use to set the weekly operation ON/OFF times.
• Up to 8 operation patterns can be set for each day.
(Not valid when the ON/OFF timer is enabled.)
OU silent mode *1Use to set the time periods in which priority is given to quiet operation of
outdoor units over temperature control. Set the Start/Stop times for each day
of the week.
•Select the desired silent level from "Normal," "Middle," and "Quiet."
Energy
saving
Restriction Temp. range *2Use to restrict the preset temperature range.
• Different temperature ranges can be set for different operation modes.
Operation lock Use to lock selected functions.
• The locked functions cannot be operated.
Energy
saving
Auto return *2Use to get the units to operate at the preset temperature after performing
energy saving operation for a specied time period.
• Time can be set to a value from 30 and 120 in 10-minute increments.
(This function will not be valid when the preset temperature ranges are restricted.)
Schedule *1Set the start/stop times to operate the units in the energy saving mode for
each day of the week, and set the energy saving rate.
• Up to 4 energy saving operation patterns can be set for each day.
• Time can be set in 5-minute increments.
• Energy saving rate can be set to a value from 0% or 50 to 90% in 10% increments.

8
OCHT341
Main
menu Setting and display items Setting details
Initial
setting
Basic
setting
Main/Sub When connecting 2 remote controllers, one of them needs to be designated as
a sub controller.
Clock Use to set the current time.
Daylight
saving time
Set the daylight saving time.
Administrator
password
The administrator password is required to make the settings for the following
items.
• Timer setting • Energy saving setting • Weekly timer setting
• Restriction setting • Outdoor unit silent mode setting • Night set back
Display
setting
Main display Use to switch between "Full" and "Basic" modes for the Main display.
• The initial setting is "Full."
Black and white
inversion setting
Use to invert the colors of the display, turning white background to black and
black characters to white.
Display details Make the settings for the remote controller related items as necessary.
Clock: The initial settings are "Yes" and "24h" format.
Temperature: Set either Celsius (°C) or Fahrenheit (°F).
Room temp. : Set Show or Hide.
Auto mode: Set the Auto mode display or Only Auto display.
Contrast •
Brightness
Use to adjust screen contrast and brightness.
Language
selection
Use to select the desired language.
Operation
setting
Auto mode Whether or not to use the Auto mode can be selected by using the button.
This setting is valid only when indoor units with the Auto mode function are
connected.
Setback mode Whether or not to use the Setback mode can be selected by using the button.
This setting is valid only when indoor units with the Setback mode function
are connected.
Mainte-
nance
Error information Use to check error information when an error occurs.
• Check code, error source, refrigerant address, unit model, manufacturing number,
contact information (dealer's phone number) can be displayed.
(The unit model, manufacturing number, and contact information need to be
registered in advance to be displayed.)
Filter information Use to check the lter status.
• The lter sign can be reset.
Cleaning Auto
descending
panel
Use to lift and lower the auto descending panel (Optional parts).
Service Test run Select "Test run" from the Service menu to bring up the Test run menu.
• Test run • Drain pump test run
Input maintenance Select "Input maintenance Info." from the Service menu to bring up the
Maintenance information screen.
The following settings can be made from the Maintenance Information screen.
• Model name input • Serial No. input • Dealer information input • Initialize
maintenance info.
Settings Function setting Make the settings for the indoor unit functions via the remote controller as
necessary.
LOSSNAY setting This setting is required only when the operation of CITY MULTI units is
interlocked with LOSSNAY units.
Check
Error history
Display the error history and execute "delete error history".
Diagnosis Self check: Error history of each unit can be checked via the remote controller.
Remote controller check: When the remote controller does not work properly, use
the remote controller checking function to troubleshoot the problem.
Other Maintenance
password
Use to change the maintenance password.
Initialize remote
controller
Use to initialize the remote controller to the factory shipment status.
remote controller
information
Use to display the remote controller model name, software version, and serial
number.

9
OCHT341
3SPECIFICATION
3-1. SPECIFICATIONS
Note 1. Rating conditions
Cooling: Indoor: D.B. 80°F W.B. 67°F
outdoor: D.B. 95°F W.B. 75°F
Heating: Indoor: D.B. 70°F
outdoor: D.B. 47°F W.B. 43°F
Note 2. The number indicated in < > is for the grille.
Service ref.
Item
TPMFYP006BM140F TPMFYP008BM140F TPMFYP012BM140F TPMFYP015BM140F
Power V · HZSingle phase 208-230V 60Hz
Cooling capacity Btu/h 6,000 8,000 12,000 15,000
Heating capacity Btu/h 6,700 9,000 13,500 17,000
Electric characteristic
Input
Cooling kW 0.04 0.04 0.04 0.05
Heating kW 0.04 0.04 0.04 0.05
Current
Cooling A 0.20 0.21 0.21 0.26
Heating A 0.20 0.21 0.21 0.26
Exterior
(munsell symbol)
—Unit: Galvanized sheets · Standard grilles: ABS resin acrylic coating
Munsell <6.4Y 8.9/0.4>
Dimensions
Height
in 9-1/16<1-3/16>
Width in 31-31/32<39-3/8>
Depth in 15-9/16<18-17/32>
Heat exchanger — Cross n
Fan
Fan × No — Line ow fan × 1
Airow * CFM 230-254-283-307 258-283-304-328 272-307-343-378
External
static pressure
in W.G. 0
Fan motor
output
kW 0.028
Insulator — Polyethylene sheet
Air lter — PP honey comb fabric
Pipe
dimensions
Gas
side ø in 1/2
Liquid
side ø in 1/4
Field drain pipe size ø in 1 O.D. (PVC pipe VP-20 connectable)
Noise level * dB 27-30-33-35 32-34-36-37 33-35-37-39
Product weight Ib 31<7>
* Airflow and the noise level are indicated as Low - Medium2 - Medium1 - High.

10
OCHT341
3-2. ELECTRICAL PARTS SPECIFICATIONS
Service Ref.
Parts name Symbol TPMFYP006BM140F TPMFYP008BM140F TPMFYP012BM140F TPMFYP015BM140F
Room temperature
thermistor TH21 Resistance 30°F/15.8kΩ, 50°F/9.6kΩ, 70°F/6.0kΩ,
80°F/4.8kΩ, 90°F/3.9kΩ, 100°F/3.2kΩ
Liquid pipe thermistor TH22 Resistance 30°F/15.8kΩ, 50°F/9.6kΩ, 70°F/6.0kΩ,
80°F/4.8kΩ, 90°F/3.9kΩ, 100°F/3.2kΩ
Gas pipe thermistor TH23 Resistance 30°F/15.8kΩ, 50°F/9.6kΩ, 70°F/6.0kΩ,
80°F/4.8kΩ, 90°F/3.9kΩ, 100°F/3.2kΩ
Fuse (Indoor
controller board) FUSE 250V 6.3A
Fan motor MF
DC Brushless Motor
8-pole OUTPUT 28W
PN0H28-MB
Vane motor MV MSFJC 20M23
12V/380Ω
Drain pump DP PJV-1063
208-240V 50/60Hz
Drain sensor DS Thermistor resistance 30_F/6.3kΩ, 50_F/3.9kΩ, 70_F/2.5kΩ,
80_F/2.0kΩ, 90_F/1.6kΩ, 100_F/1.3kΩ
Linear expansion
valve LEV
DC12V Stepping motor drive
port dimension ø3.2 (0~2000pulse)
EDM-40YGME
Power supply
terminal block TB2 (L1, L2, GR) Rated to 330V 30A*
Transmission
terminal block TB5 (M1, M2, S) Rated to 250V 20A*
MA-remote controller
terminal block TB15 (1,2) Rated to 250V 10A*
*Note : Refer to WIRING DIAGRAM for the supplied voltage.

11
OCHT341
3-3. AIR CAPACITY TAKEN FROM OUTSIDE
TPMFY series are capable of taking air from outside. When taking air from outside, the duct fan is used.
The air capacity should be 20% or less of the airflow SPEC (Hi).
(Knockout)
4-Ø1/8
Fresh air intake hole
(Knockout)
Fresh air intake hole
90-
Ø4-13/16
Ø3-15/16
4-1/4
9-13/16 11-3/8
(Unit: inch)
~
CN51
Multiple remote
controller adapter
PAC-SA88HA-E
Indoor controller board
Distance between indoor
controller board and relay
must be within 33 feet.
Be sure to secure insulation
material by tape, etc.
5Green
Yellow
Orange
Connector (5P)
Indoor unit side
Multiple remote
controller adapter
PAC-SA88HA-E
Be sure to secure insulation
material by tape, etc.
CN51
on
indoor unit
board
Red
Brown
MB
1
Installation at site
+
Q
0
BA
C
1
2
3
Curve in the
right graphs
Duct characteristics
at site
Q
A
E C
Q
Qa
A D
Operation in conjunction with duct fan (Booster fan)
Whenever the indoor unit is operating, the duct fan
operates.
(1) Connect the optional multiple remote controller
adaptor (PAC-SA88HA-E) to the connector CN51
on the indoor controller board.
(2) Drive the relay after connecting the 12V DC relay
between the Yellow and Orange connector lines.
*Use a relay of 1W or smaller.
MB: Electromagnetic switch power relay for duct fan.
X: Auxiliary relay (12V DC LY-1F)
How to read curves
0.2
Static pressure (in.W.G.)
0.1
0
-0.1
-0.2
-0.3
-0.4
0 10
Airflow (CFM)
20
Characteristic diagram of air capacity taken from outside of TPMFYP·BM140F
30 40 50 60 70 80
2 intake
1 intake
Q…Designed amount of fresh air
intake <CFM>
A…Static pressure loss of fresh air
intake duct system with airflow
amount Q <in. W.G>
B…Forced static pressure at air condi-
tioner inlet with airflow amount Q
<in. W.G>
C…Static pressure of booster fan with
airflow amount Q <in. W.G>
D…Static pressure loss increase
amount of fresh air intake duct
system for airflow amount Q
<in. W.G>
E…Static pressure of indoor unit with
airflow amount Q <in. W.G>
Qa…Estimated amount of fresh air
intake without D <CFM>
Service Ref. Airow (Hi) Air capacity taken from outside
TPMFYP006BM140F 307 CFM 61CFM
TPMFYP008BM140F 328 CFM 66CFM
TPMFYP012BM140F 328CFM 66CFM
TPMFYP015BM140F 378CFM 76CFM

12
OCHT341
3-4. NOISE CRITERION CURVES
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
APPROXIMATE THRESHOLD OF HEARING
FOR CONTINUOUS NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
BAND CENTER FREQUENCIES, Hz
TPMFYP006BM140F
High
NOTCH
Medium1
Medium2
Low
35
SPL(dB)
33
30
27
LINE
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
BAND CENTER FREQUENCIES, Hz
High
NOTCH
Medium1
Medium2
Low
37
SPL(dB)
36
34
32
LINE
TPMFYP008BM140F
TPMFYP012BM140F
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
BAND CENTER FREQUENCIES, Hz
TPMFYP015BM140F
High
NOTCH
Medium1
Medium2
Low
39
SPL(dB)
37
35
33
LINE
UNIT
5ft
MICROPHONE
CEILING

13
OCHT341
4OUTLINES AND DIMENSIONS
90°
[
4-13/16(
[
122)
[
3-15/16(
[
100)
Drain pan panel
Ceiling
Ceiling panel
OD
[
1/4(
[
6.35)
pipe(liquid) Refrigirant
1/2F([12.7)
OD
[
1/2(
[
12.7)
Refrigirant pipe(gas)
Drainage piping PVC pipe:VP-20[OD[31/32([25)
1/4F([6.35) OD[1-11/16([43)
Gas pipe Liquid pipe pipe cover
piping Refrigerant
Drain pan
Elect box
[OD
[
31/32(
[
25)]
PVC pipe: VP-20 Drainage pipe
Left side
Right side
Top
Lower view
Details of fresh air intake hole
Front
Air outlet(lower)
Same line
Terminal block for transmission Flesh air intake hole
Knockout
4-[1/8([2.8) Burring hole
Terminal block for power supply
around indoor unit
Installation space required
Outer line of grille
Center of unit
Suspension bolt(M10 or W3/8)
Panel(grille):TMP-16BMUW Panel(grille):TMP-16BMUW
Mounting plate
remote-controller Terminal block for
(110)
(288.5)
(250)
(200) (200)
Suspension bolt pitch
Suspension bolt pitch
Ceiling opening
Ceiling opening
Outer side of grille
Outer side of grille
Outer side of grille
outer side of grille
(230)
(198)
or more
18-1/2(470)
39-3/8(1000)
2-15/18(74.5)
13/16(20)
13/16(20)
8-1/2(470)
16-15/16(430)
1-25/32(45)
13-3/8(340)
1-25/32(45)
11/16(17.5) 11/16(17.5)
39-3/8(1000)
13/16(20)13/16(20)
37-13/16(960)
2-15/18(74.5)
31-15/18(811)
1-1/32(26)
29-7/8(759)
9-1/2(235)
9-1/16(230)
4-5/16(110)
4-5/16
1-3/16(30)
9-3/8(247)
2-11/16(69)
2-1/16(53)
13/16(20)
1-1/32(26)
13/16(20)
1-1/8(28) 1-1/8(28)
1-11/16(43)
1-13/18(46)
7-7/8
23-5/8(600)
7-7/8
1-9/16(40)
2-3/8(60)
11-3/8
9-13/16
4-4/16(108)
29-7/8(759)
31-15/16(812)
[
1-31/32(
[
50)
(2-3/16(56))
3-3/8(96)
6-15/16(176)
15-9/16(395)
11-7/8(302)
10(254)
5-9/16(140)
9-1/16
13/16(20)
(13/32(10))
7-13/16
(3-3/8(96))
TPMFYP006BM140F
TPMFYP008BM140F
TPMFYP012BM140F
TPMFYP015BM140F
Unit : inch (mm)

14
OCHT341
5WIRING DIAGRAM
TPMFYP006BM140F TPMFYP008BM140F TPMFYP012BM140F TPMFYP015BM140F

15
OCHT341
REFRIGERANT SYSTEM DIAGRAM6
Strainer (#100mesh)
Strainer pipe (#100mesh)
Strainer
(#100mesh)
Strainer
(#50mesh)
Heat exchanger
Thermistor TH21
<Room temperature detection>
Thermistor TH23
<Gas pipe temperature
detection>
Thermistor TH22
<Liquid pipe temperature
detection>
Linear expansion valve
Gas pipe
Liquid pipe
Flare connection
Refrigerant flow in cooling
Refrigerant flow in heating
TPMFYP006BM140F TPMFYP008BM140F TPMFYP012BM140F TPMFYP015BM140F
Model
Item
TPMFYP006BM140F
TPMFYP008BM140F
TPMFYP012BM140F
TPMFYP015BM140F
Gas pipe ø1/2"(12.7)
Liquid pipe ø1/4"(6.35)
Unit: in (mm)

16
OCHT341
7MICROPROCESSOR CONTROL
INDOOR UNIT CONTROL
7-1. COOL OPERATION
Control modes Control details
1-1.Temperature adjustment function
• Room temperature ]Set temperature + 2 °F: Thermo ON
• Room temperature [Set temperature: Thermo OFF
1-2. Anti-freeze control
Condition to detect: When the liquid pipe temp. (TH22) is 32˚F or less in 16
minutes from compressors start up, anti-freeze control
starts and the thermo
stat OFF.
Condition to release: The timer which prevents reactivating is set for 3 minutes,
and anti-freeze control is cancelled when any one of the
following conditions is satisfied.
1 Liquid pipe temp. (TH22) turns to be 50˚F or above.
2 The condition of the thermostat OFF becomes
complete by thermostat, etc.
3 The operation mode becomes a mode other than COOL.
4The operation stops.
1-3. Compressor time delay
• 3 minutes minimum off cycle.
By the remote controller setting (switch of 4 speeds)
2. Fan
1. Temperature
adjustment function
Type Fan speed notch
[Low], [Medium2], [Medium1], [High]
4 speeds
<How to operate>
1 Press POWER ON/OFF button.
2 Press the operation MODE button to display COOL.
3 Press the TEMP. button to set the set temperature.
NOTE: The set temperature changes 1°F when the or button
is pressed one time. Cooling 67 to 87°F
<How to operate>
1 Press ON/OFF button.
2 Press [F1] button to display COOL.
3 Press [F2] [F3] button to set the set temperature.
NOTE: The settable temperature range varies with the model of
outdoor units and remote controller.
MENU ON
OFF
RETURN SELECT
HOLD
.

17
OCHT341
→
Control modes Control details
3-1. Drain pump control
• The drain pump will always run when the unit is in COOL or DRY mode.
(Regardless of the thermostat ON/OFF)
• When the operation mode is changed from COOL or DRY to any other mode
(including Stop), the drain pump continues to run for 3 minutes.
Drain sensor function
• The indoor circuit board energizes the drain sensor at a fixed voltage for a fixed
duration. After energizing, the circuit board compares the drain sensor’s
temperature to the one before energizing, and judges whether the sensor is in
the air or in the water.
Basic control system
• While drain pump is turned on, it will repeat the following control system and judge
whether the sensor is in the air or in the water.
•Drain sensor temperature rise (t)
•Temperature of drain sensor before current is applied (T0)
•Temperature of drain sensor after current is applied (T1)
[ t = T1– T0]
(1)Initial setting: The initial vane setting for COOL mode is the horizontal
position.
(2)Vane position: Horizontal→Downward A →Downward B →Downward C→Swing
(3)Restriction of the downward vane setting
When setting the downward vane A, B or C in [Medium1], [Medium2] or [Low] of
the fan speed notch, the vane changes to horizontal position after 1 hour has
passed.
* 1
4. Vane
(up/down vane
position change)
3. Drain pump
Remarks
* 1
"Only 1 Hr"
appears on the
wired remote
controller.
Timing of
energizing
drain sensor
ON
OFF
Stand by for
a minute
30
sec
30
sec
Detect the
temperature
before
energizing.
(T0)
Detect the
temperature
after
energizing.
(T1)
Judge whether
the sensor is in
the air or in the
water.
Stand by for
a minute
·······Repeat

18
OCHT341
Control modes Control details
1-1. Dry mode temperature is controlled by TH21.
Dry mode ON Room temperature ] Set temperature + 2˚F
Dry mode OFF Room temperature [ Set temperature
1-2. Freeze prevention control
No control function
Indoor fan operation control depends on the compressor conditions.
3. Drain pump
1. Temperature
adjustment function
Room
temperature
3 min passed since starting operation
Dry mode
Room temperature (Ta)
Dry mode
ON
time (min)
Dry mode
OFF
time (min)
Less than 64˚F
Over 64˚F
ON
OFF
Ta ] 83˚F
83˚F > Ta ] 79˚F
79˚F > Ta ] 75˚F
75˚F > Ta
Unconditional
9 3
73
53
3 3
10
3
Dry mode OFF
2. Fan
Note: Fan speed change is not allowed during DRY operation.
Dry mode Fan speed notch
ON
OFF
[Low]
Stop
4. Vane
(up/down vane
position change)
Operates as it would in COOL operation.
Settings are the same in DRY operation as they are in COOL operation.
7-2. DRY OPERATION
<How to operate>
1 Press POWER ON/OFF button.
2 Press the operation MODE button to display DRY.
3 Press the TEMP. button to set the set temperature.
NOTE: The set temperature changes 1°F when the or
button is pressed one time. Dry 67 to 87°F
<How to operate>
1 Press ON/OFF button.
2 Press [F1] button to display DRY.
3 Press [F2] [F3] button to set the set temperature.
MENU ON
OFF
RETURN SELECT
HOLD
.

19
OCHT341
Control modes Control details
Set by remote controller.
2. Drain pump
1. Fan
Type Fan speed notch
4 speeds type [Low], [Medium2], [Medium1], [High]
3. Vane
(up/down vane
position change)
2-1. Drain pump control
The drain pump turns ON for the specified amount of time when any of the
following conditions is satisfied:
1 ON for 3 minutes after the operation mode is switched from COOL or DRY to
another operation mode (FAN).
2 ON for 6 minutes after the drain sensor is determined to be submerged
using the liquid level detection method given below.
3 ON for 6 minutes after indoor piping (liquid piping) temperature – indoor
room temperature [ -18˚F, AND the drain sensor input is at the short or
open level.
(If condition 2or 3is still being met after the drain pump has been turned ON
for 6 minutes, the drain pump is kept ON for a further 6 minutes.)
2-2. Liquid level detection method
The liquid level is detected by determining whether or not the drain sensor is
submerged, based on the amount the temperature rises after self-heating the
sensor. This process is performed if any of the following conditions is satisfied:
1 Drain pump is ON.
2 Indoor piping (liquid piping) temperature – indoor room temperature [ -18˚F
3 Indoor piping (liquid piping) temperature or indoor room temperature is at
the short or open level temperature.
4 Every 1 hour after the drain pump has been switched from ON to OFF.
Same as the control performed during COOL operation, but with no restriction on
the vane's downward blow setting.
7-3. FAN OPERATION
MENU ON
OFF
RETURN SELECT
HOLD
.
<How to operate>
1 Press ON/OFF button.
2 Press [F1] button to display FAN.
<How to operate>
1 Press POWER ON/OFF button.
2 Press the operation MODE button to display FAN.

20
OCHT341
Control modes Control details
1-1. Minimum compressor off cycle is 3 minutes.
• Room temperature [ Set temperature -2˚F: Thermo ON
• Room temperature ] Set temperature: Thermo OFF
1. Temperature
adjustment
function
Remarks
Controlled by the remote controller (4-speed)
Priority is given to below-mentioned control mode
2-1. Stand by (hot adjust) mode
2-2. Residual heat exclusion mode
2-3. Thermo OFF mode (When the compressor off by the thermostat)
2-4. Cool air prevention mode (Defrosting mode)
2-1. Stand by (hot adjust) mode
The fan controller becomes the stand by (hot adjust) mode for the following
conditions.
1 When starting HEAT operation
2 When the temperature adjustment function changes from OFF to ON
3 When HEAT defrosting operation is released
2. Fan
A: Stand by (hot adjust) mode start
B: 5 minutes have passed since the condition A or the indoor liquid pipe
temperature reached 95°F or more.
C: 2 minutes have passed since the condition A.
(Terminating the stand by (hot adjust) mode)
ACB
[Extra Low]
[Low]
Set fan speed by the remote controller
Hot adjust mode
*1 *1
"STAND BY"
will be displayed
during the stand
by (hot adjust)
mode.
To be continued to the next page.
7-4. HEAT OPERATION
<How to operate>
1 Press POWER ON/OFF button.
2 Press the operation MODE button to display HEAT.
3 Press the TEMP. button to set the set temperature.
NOTE: The set temperature changes 1°F when the or
button is pressed one time. Heating 63 to 83°F
<How to operate>
1 Press ON/OFF button.
2 Press [F1] button to display HEAT.
3 Press [F2] [F3] button to set the set temperature.
NOTE: The settable temperature range varies with the model of
outdoor units and remote controller.
MENU ON
OFF
RETURN SELECT
HOLD
.