Panasonic S-22MF2E5A8 User manual

85464849332002 REFERENCE NO.SM830232-02
Indoor Unit
Type 2215 28 36 45 56 60 73 90 106
K1
Wall Mounted
140
T2
Ceiling
160
U2
4-Way Cassette
K2
Wall Mounted
Y2
4-Way Cassette
60×60
F2
Low Silhouette
Ducted
S-22MU2E5A
S-22MK2E5AS-15MK2E5A
S-15MM1E5AS-22MM1E5AS-28MM1E5AS-36MM1E5AS-45MM1E5AS-56MM1E5A
S-22MY2E5AS-15MY2E5A
S-22MF2E5AS-15MF2E5A
S-28MU2E5A
S-28MK2E5A
S-28MY2E5A
S-28MF2E5A
S-36MT2E5A
S-36MU2E5A
S-36MK2E5A
S-36MY2E5A
S-36MF2E5A
S-45MK1E5A
S-45MT2E5A
S-45MU2E5A
S-45MY2E5A
S-45MF2E5A
S-56MK1E5A
S-56MT2E5A
S-56MU2E5A
S-56MY2E5A
S-56MF2E5A
S-60MU2E5A
S-60MF2E5A
S-73MK1E5A
S-73MT2E5A
S-73MU2E5A
S-73MF2E5A
S-90MU2E5A
S-90MF2E5A
S-106MK1E5A
S-106MT2E5A
S-106MU2E5A
S-106MF2E5A
S-140MT2E5A
S-140MU2E5A
S-140MF2E5A
S-160MU2E5A
U1
4-Way Cassette S-22MU1E5A S-28MU1E5A S-36MU1E5A S-45MU1E5A S-56MU1E5A S-60MU1E5A S-73MU1E5AS-90MU1E5A S-106MU1E5A S-140MU1E5A S-160MU1E5A
S-160MF2E5A
S-22MF2E5A8 S-28MF2E5A8 S-36MF2E5A8 S-45MF2E5A8 S-56MF2E5A8S-60MF2E5A8 S-73MF2E5A8 S-90MF2E5A8 S-106MF2E5A8 S-140MF2E5A8 S-160MF2E5A8
Order No. SBPAC1404002CE
VRF SYSTEMS INDOOR UNIT
4-Way Cassette
(Type U2)
Low Silhouette Ducted
(Type F2)
Ceiling
(Type T2)
SERVICE MANUAL & TEST RUN SERVICE MANUAL
Indoor Unit
Type 224180
E2
High Static
Pressure Ducted
M1
Slim Low Static
Ducted
S-224ME2E5
280
S-280ME2E5S-180ME2E5
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●Connectable outdoor unit lineup
This document is the Service Manual of the indoor unit.
For outdoor unit, refer to the Service Manual of the outdoor unit.
■For Europe
■For Asia
■For Oceania
Type Outdoor Unit Type 4 hp 5 hp 6 hp 8 hp 10 hp
ME1 2WAY VRF System U-8ME1E81 U-10ME1E81
MF2 3WAY VRF System U-8MF2E8 U-10MF2E8
LE1 Mini VRF System U-4LE1E5 U-5LE1E5 U-6LE1E5
U-4LE1E8 U-5LE1E8 U-6LE1E8
Type Outdoor Unit Type 4 hp 5 hp 6 hp 8 hp 10 hp
ME1 2WAY VRF System U-8ME1H7 U-10ME1H7
U-8ME1H7E* U-10ME1H7E*
LE1 Mini VRF System
U-4LE1H4 U-5LE1H4 U-6LE1H4
U-4LE1H4E* U-5LE1H4E* U-6LE1H4E*
U-4LE1H7 U-5LE1H7 U-6LE1H7
U-4LE1H7E* U-5LE1H7E* U-6LE1H7E*
Type Outdoor Unit Type 4 hp 5 hp 6 hp 8 hp 10 hp
ME1 2WAY VRF System
U-8ME1R8 U-10ME1R8
U-8ME1R8B U-10ME1R8B
U-8ME1R8BE* U-10ME1R8BE*
MF2 3WAY VRF System
U-8MF2R7 U-10MF2R7
U-8MF2R7B U-10MF2R7B
U-8MF2R7BE* U-10MF2R7BE*
LE1 Mini VRF System
U-4LE1R5 U-5LE1R5 U-6LE1R5
U-4LE1R5E* U-5LE1R5E* U-6LE1R5E*
U-4LE1R8 U-5LE1R8 U-6LE1R8
U-4LE1R8E* U-5LE1R8E* U-6LE1R8E*
Type Outdoor Unit Type 12 hp 14 hp 16 hp 18 hp 20 hp
ME1 2WAY VRF System U-12ME1E81 U-14ME1E81 U-16ME1E81 U-18ME1E81 U-20ME1E81
MF2 3WAY VRF System U-12MF2E8 U-14MF2E8 U-16MF2E8
Type Outdoor Unit Type 12 hp 14 hp 16 hp 18 hp 20 hp
ME1 2WAY VRF System U-12ME1H8 U-14ME1H8 U-16ME1H8 U-18ME1H8 U-20ME1H8
U-12ME1H8E* U-14ME1H8E* U-16ME1H8E* U-18ME1H8E* U-20ME1H8E*
* Salt-Air Damage Resistant Specifications.
November 2014
Type Outdoor Unit Type 12 hp 14 hp 16 hp 18 hp 20 hp
ME1 2WAY VRF System
U-12ME1R8 U-14ME1R8 U-16ME1R8 U-18ME1R8 U-20ME1R8
U-12ME1R8B U-14ME1R8B U-16ME1R8B U-18ME1R8B U-20ME1R8B
U-12ME1R8BE* U-14ME1R8BE* U-16ME1R8BE* U-18ME1R8BE* U-20ME1R8BE*
MF2 3WAY VRF System
U-12MF2R8 U-14MF2R8
U-12MF2R8B U-14MF2R8B
U-12MF2R8BE* U-14MF2R8BE*
* Salt-Air Damage Resistant Specifications.
i
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ii
IMPORTANT!
Please Read Before Starting
This air conditioner must be installed by the sales dealer
or installer.
This information is provided for use only by authorized
persons.
For safe installation and trouble-free operation, you
must:
Carefully read this instruction booklet before beginning.
Follow each installation or repair step exactly as shown.
This air conditioner shall be installed in accordance with
National Wiring Regulations.
The product meets the technical requirements of
EN/IEC 61000-3-3.
Pay close attention to all warning and caution notices
given in this manual.
WARNING
This symbol refers to a hazard or
unsafe practice which can result in
severe personal injury or death.
CAUTION
This symbol refers to a hazard or
unsafe practice which can result in
personal injury or product or property
damage.
If Necessary, Get Help
These instructions are all you need for most installation
sites and maintenance conditions. If you require help for
a special problem, contact our sales/service outlet or your
certified dealer for additional instructions.
In Case of Improper Installation
The manufacturer shall in no way be responsible for
improper installation or maintenance service, including
failure to follow the instructions in this document.
SPECIAL PRECAUTIONS
CAUTION
WARNING When Wiring
WARNING
Risk of Electric Shock
ELECTRICAL SHOCK CAN
CAUSE SEVERE PERSONAL
INJURY OR DEATH. ONLY A
QUALIFIED, EXPERIENCED
ELECTRICIAN SHOULD
ATTEMPT TO WIRE THIS
SYSTEM.
•not supply power to the unit until
all wiring and tubing are completed or
reconnected and checked.
•dangerous electrical voltages are
used in this system. Carefully refer to the
wiring diagram and these instructions
when wiring. Improper connections
and inadequate grounding can cause
accidental injury or death.
Connect all wiring tightly. Loose wiring
may cause overheating at connection
points and a possible fire hazard.
•
•
Provide a power outlet to be used
exclusively for each unit.
•Provide a power outlet exclusively for
each unit, and full disconnection means
having a contact separation by 3 mm
in all poles must be incorporated in the
fixed wiring in accordance with the wiring
rules.
•To prevent possible hazards from
insulation failure, the unit must be
grounded.
•This equipment is strongly recommended
to be installed with Earth Leakage
Circuit Breaker (ELCB) or Residual
Current Device (RCD). Otherwise, it may
cause electrical shock and fire in case
of equipment breakdown or insulation
breakdown.
When Transporting
• It may need two or more people to carry
out the installation work.
•Be careful when picking up and moving
the indoor and outdoor units. Get a
partner to help, and bend your knees
when lifting to reduce strain on your
back. Sharp edges or thin aluminum
fins on the air conditioner can cut your
fingers.
When Installing…
Select an installation location which is
rigid and strong enough to support or hold
the unit, and select a location for easy
maintenance.
…In a Room
Properly insulate any tubing run inside a
room to prevent “sweating” that can cause
dripping and water damage to walls and
floors.
CAUTION
CAUTION
Keep the fire alarm and
the air outlet at least
1.5 m away from the
unit.
Do
Highly
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iii
•Keep all tubing runs as short as
possible.
•Use the flare method for connecting
tubing.
•Apply refrigerant lubricant to the
matching surfaces of the flare and union
tubes before connecting them, then
tighten the nut with a torque wrench for
a leak-free connection.
•Check carefully for leaks before starting
the test run.
•Do not leak refrigerant while piping work
for an installation or re-installation, and
while repairing refrigeration parts.
Handle liquid refrigerant carefully as it
may cause frostbite.
When Servicing
•Turn the power OFF at the main
power box (mains), wait at least 10
minutes until it is discharged, then
open the unit to check or repair
electrical parts and wiring.
•Keep your fingers and clothing away
from any moving parts.
•Clean up the site after you finish,
remembering to check that no metal
scraps or bits of wiring have been left
inside the unit.
CAUTION
WARNING
•This product must not be
modified or disassembled under
any circumstances. Modified or
disassembled unit may cause fire,
electric shock or injury.
•Do not clean inside the indoor and
outdoor units by users. Engage
authorized dealer or specialist for
cleaning.
•In case of malfunction of this
appliance, do not repair by
yourself. Contact to the sales
dealer or service dealer for a
repair.
…In Moist or Uneven Locations
Use a raised concrete pad or concrete
blocks to provide a solid, level foundation
for the outdoor unit. This prevents water
damage and abnormal vibration.
…In an Area with High Winds
Securely anchor the outdoor unit down
with bolts and a metal frame. Provide a
suitable air baffle.
…In a Snowy Area (for Heat Pump-
type Systems)
Install the outdoor unit on a raised
platform that is higher than drifting snow.
Provide snow vents.
…At least 2.5 m
Indoor unit of this air conditioner shall be
installed in a height of at least 2.5 m.
…In laundry rooms
Do not install in laundry rooms. Indoor
unit is not drip proof.
When Connecting Refrigerant
Tubing
Pay particular attention to refrigerant
leakages.
CAUTION
WARNING
•When performing piping work,
do not mix air except for
specified refrigerant (R410A)
in refrigeration cycle. It causes
capacity down, and risk of
explosion and injury due to high
tension inside the refrigerant
cycle.
•If the refrigerant comes in contact
with a flame, it produces a toxic
gas.
•Do not add or replace refrigerant
other than specified type. It may
cause product damage, burst and
injury, etc.
•Ventilate the room immediately, in the
event that is refrigerant gas leaks during
the installation. Be careful not to allow
contact of the refrigerant gas with a
flame as this will cause the generation
of toxic gas.
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iv
CAUTION
CAUTION
•Ventilate any enclosed areas when
installing or testing the refrigeration
system. Leaked refrigerant gas,
on contact with fire or heat, can
produce dangerously toxic gas.
•Confirm after installation that no
refrigerant gas is leaking. If the gas
comes in contact with a burning
stove, gas water heater, electric
room heater or other heat source,
it can cause the generation of toxic
gas.
Others
CAUTION
CAUTION
•Do not sit or step on the unit,
you may fall down accidentally.
•Do not touch the air inlet or
the sharp aluminum fins of the
outdoor unit. You may get
injured.
•Do not stick any object into the
FAN CASE.
You may be injured and the unit
may be damaged.
NOTICE
The English text is the original instructions. Other
languages are translations of the original instructions.
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v
When Installing…
Check the following to use the FRESH
AIR INTAKE MODE.
WARNING
•Install the outdoor air intake port in
an area where the combustion gas
cannot be inhaled.
If safety issues exist, the room
becomes oxygen-deprived and this
will cause the fatal accident.
•Do not make air around the
discharge air outlet lead to the
outdoor air intake port. The indoor air
is contaminated and this causes the
health problem.
W
CAUTION
•In the area where the temperature
inside the unit becomes below 0°C
due to cold air in cold climates,
install the electrical damper onto
the outdoor air duct for antifreeze
measurement.
•Select the installation location where
the temperature and humidity are
within the usability range.
If the relative humidity inside the
ceiling exceeds 80%, measure
against the condensation (additional
insulation, etc.)
•Be sure to insulate the piping to
protect the condensation.
In the case of insufficiency, water
may enter the building and this may
cause damage to the furniture or
interiors, etc.
•
•
Install the piping to be slightly
slanting to the outdoor side.
In the case of insufficiency, rain
drops may enter the building and
damage the furniture or cause
electric shock and fire.
Avoid the area where sulfurous acid
gas, corrosive gas or salt erosion
potentially occur. This may cause
corrosion to the copper tube and
brazing part.
As a result, refrigerant gas may leak.
SPECIAL PRECAUTIONS
WARNING When Wiring
ELECTRICAL SHOCK CAN
CAUSE SEVERE PERSONAL
INJURY OR DEATH. ONLY A
QUALIFIED, EXPERIENCED
ELECTRICIAN SHOULD
ATTEMPT TO WIRE THIS
SYSTEM.
This notice is only for High Static
Pressure Ducted type.
•This equipment is strongly recommended
to be installed with Earth Leakage
Circuit Breaker (ELCB) or Residual
Current Device (RCD). Otherwise, it may
cause electrical shock and fire in case
of equipment breakdown or insulation
breakdown.
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vi
— CONTENTS —
Section 1: CONTROL FUNCTIONS-Outdoor Unit ..............................1-1
* Refer to the Service Manual of Outdoor Unit.
Section 2: CONTROL FUNCTIONS-Indoor Unit ...............................2-1
1. Room Temperature Control .................................................2-2
2. Heating Standby .........................................................2-5
3. Automatic Fan Speed Control ...............................................2-6
4. Indoor Unit MOV Control ...................................................2-7
5. Drain Pump Control ......................................................2-7
6. Automatic Heating / Cooling Control ..........................................2-8
7. Discharge Air Temperature Control ...........................................2-9
8. RAP Valve Kit Control .....................................................2-9
9. Automatic Flap Control ...................................................2-10
10. Filter Sign .............................................................2-10
11. Electric Heater Control ...................................................2-11
12. Fan Control during Dry Mode ..............................................2-11
13. Ventilation Fan Output ....................................................2-12
14. T10 Terminal ...........................................................2-12
15. Parameter .............................................................2-13
16. Indoor Unit Control PCB ..................................................2-14
Section 3: OUTDOOR UNIT REPAIR PROCEDURES ...........................3-1
* Refer to the Service Manual of Outdoor Unit.
Section 4: OUTDOOR UNIT MAINTENANCE REMOTE CONTROLLER ............4-1
* Refer to the Service Manual of Outdoor Unit.
Section 5: REMOTE CONTROLLER FUNCTIONS .............................5-1
1. Simple Settings Function ...................................................5-2
2. Detailed Settings Function..................................................5-9
3. Remote Controller Servicing Functions .......................................5-44
Section 6: TROUBLE DIAGNOSIS ..........................................6-1
* Refer to the Service Manual of Outdoor Unit.
Section 7: TEST RUN from the remote controller .............................7-1
1. Test Run................................................................7-2
2. Auto Address Setting ......................................................7-4
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vii
– MEMO –
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1- 1
VRF SYSTEMS Indoor Unit
1
1. CONTROL FUNCTIONS-Outdoor Unit
* Refer to the Service Manual of Outdoor Unit.
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– MEMO –
1- 2
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2- 1
VRF SYSTEMS Indoor Unit
2
2. CONTROL FUNCTIONS-Indoor Unit
1. Room Temperature Control ..............................................2-2
2. Heating Standby .......................................................2-5
3. Automatic Fan Speed Control ............................................2-6
4. Indoor Unit MOV Control ................................................2-7
5. Drain Pump Control ....................................................2-7
6. Automatic Heating / Cooling Control ......................................2-8
7. Discharge Air Temperature Control .......................................2-9
8. RAP Valve Kit Control ...................................................2-9
9. Automatic Flap Control ................................................2-10
10. Filter Sign ...........................................................2-10
11. Electric Heater Control .................................................2-11
12. Fan Control during Dry Mode ...........................................2-11
13. Ventilation Fan Output .................................................2-12
14. T10 Terminal ..........................................................2-12
15. Parameter ............................................................2-13
16. Indoor Unit Control PCB ................................................2-14
Contents
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VRF SYSTEMS Indoor Unit
2- 2
2
1. Room Temperature Control
1. Room Temperature Control
The body sensor or remote controller sensor detects temperature in the room. The detected temperature is
called the room temperature. The body sensor is the one contained in the indoor unit.
Body sensor is enabled Remote controller sensor is enabled
Set temp. Set temp. in remote controller Set temp. in remote controller
Detected temp. by
sensor
Detected temp. by body sensor Detected temp. by remote controller
sensor
Room temp. Detected temp. by body sensor -
*correction temp.
Detected temp. by remote controller
sensor
The thermostat is turned ON or OFF according to the following T.
T (Cooling) T = room temp. – set temp. (set temp. in remote controller)
T (Heating) T = set temp. – room temp.
Correction temperature (only during heating)
If the indoor unit is installed on the ceiling, temperature near the ceiling is higher than near the floor. When
the body sensor is enabled, lower temperature near the floor must be considered. To correct this difference in
temperature, the correction temperature is used.
The factory setting for the correction temperature is different depending on the model. Refer to “15. Parameter”.
Example: Cooling temperature correction
4-Way cassette (correction temperature: 0 degrees)
Body sensor is enabled
Set temp. in remote
controller 28℃28℃28℃
Detected temp. by
sensor 30.0℃27.5℃27.0℃
Detected temp. by
body sensor 30.0℃27.5℃27.0℃
Detected temp. by
remote controller
sensor
30.0℃27.5℃27.0℃
Room temp. = temp.
detected by body
sensor
30.0℃
=30.0
27.5℃
=27.5
27.0℃
=27.0
T +2.0deg -0.5deg -1.0deg
Thermostat
ON
Thermostat
ON
Thermostat
OFF
Example: Heating temperature correction
4-Way cassette (correction temperature: 4 degrees)
Body sensor is enabled
Set temp. in remote
controller 20℃20℃20℃
Detected temp. by
sensor 17.0℃22.0℃25.0℃
Detected temp. by
body sensor 17.0℃22.0℃25.0℃
Detected temp. by
remote controller
sensor
13.0℃18.0℃21.0℃
Room temp. = temp.
detected by body
sensor – 4 deg
13.0℃
=17.0-4
deg
18.0℃
=22.0-4
deg
21.0℃
=25.0-4
deg
T +7.0deg +2.0deg -1.0deg
Thermostat
ON
Thermostat
ON
Thermostat
OFF
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2- 3
VRF SYSTEMS Indoor Unit
2
1. Room Temperature Control
Remote controller sensor is enabled
Set temp. in remote
controller 28℃28℃28℃
Detected temp. by
sensor 30.0℃27.5℃27.0℃
Detected temp. by
body sensor 30.0℃27.5℃27.0℃
Detected temp. by
remote controller
sensor
30.0℃27.5℃27.0℃
Room temp. = temp.
detected by remote
controller sensor
30.0℃
=30.0
27.5℃
=27.5
27.0℃
=27.0
T +2.0deg -0.5deg -1.0deg
Thermostat
ON
Thermostat
OFF
Thermostat
OFF
Remote controller sensor is enabled
Set temp. in remote
controller 20℃20℃20℃
Detected temp. by
sensor 17.0℃20.5℃21.0℃
Detected temp. by
body sensor 21.0℃24.5℃25.0℃
Detected temp. by
remote controller
sensor
17.0℃20.5℃21.0℃
Room temp. = temp.
detected by remote
controller sensor
17.0℃
=17.0
20.5℃
=20.5
21.0℃
=21.0
T +3.0deg -0.5deg -1.0deg
Thermostat
ON
Thermostat
OFF
Thermostat
OFF
①The thermostat does not turn OFF for 3 minutes after it turns ON.
②The thermostat does not turn ON 1 to 3 minutes after it turns OFF.
③The thermostat does not turn OFF for 60 minutes during the test run mode. (Forced thermostat ON)
*However, the thermostat turns OFF if an alarm occurs.
ON ONOFF
Set temp.
Set temp.
Set temp.
Set temp.
-1
+1
+2
(deg)
ON ONOFF
+1
+2
-1
(deg)
ON ONOFF
-1
+1
+2
(deg)
Heating
ON ONOFF
+1
+2
-1
(deg)
Body sensor is enabled Remote controller sensor is enabled
-0.5
-0.5
Room temp.
Cooling
Room temp.
Cooling
Heating
Room temp.
Room temp.
Thermostat Thermostat
ThermostatThermostat
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VRF SYSTEMS Indoor Unit
2- 4
2
1. Room Temperature Control
Intake Air Temperature Control
< FRESH AIR INTAKE MODE (Type E2) >
This product brings outdoor fresh air into the building and adjusts and supplies the air with nearly current indoor temperature.
Automatic cooling and heating operation mode
Due to the temperature difference between the outdoor air and preset temperature in remote controller, cooling or heating
operation can be automatically selected.
In the case of group control, the setting is possible when all of the indoor units in the same refrigerant circuit consist of one
group.
Cooling operation mode : In case that the outdoor temperature is 5°C higher than the preset temperature in remote
controller.
Fan operation mode : In case that the outdoor temperature and preset temperature in remote controller are within
±5°C.
Heating operation mode : In case that the outdoor temperature is 5°C lower than the preset temperature in remote
controller.
Example: In case that the preset temperature in remote controller set at 20°C
(43)4030100 20
)5–()5–(
15 25
(+5)
Outdoor temperature (°C)
Heating operation mode
Discharge temperature
setting at 45°C
Cooling operation
mode
Discharge temperature
setting at 18°C
Fan operation
mode
Discharge
temperature
setting in a
range of
15 - 25°C
Cooling operation mode
It is recommended that the temperature setting in remote controller be more than 24°C.
If the intake air temperature is getting higher than the preset temperature in remote controller, the unit operates in cooling
mode. On the contrary, if the intake air temperature becomes lower than the preset temperature, the unit operates in fan
mode.
Heating operation mode
It is recommended that the temperature setting in remote controller be set at 16°C.
If the intake air temperature is getting lower than the preset temperature in remote controller, the unit operates in heating
mode. On the contrary, if the intake air temperature becomes higher than the preset temperature, the unit operates in fan
mode.
Fan operation mode
In the moderate climates, supply of fresh outdoor air can provide as passive cooling.
NOTE In general, it is recommended that you set in the automatic cooling and heating operation mode.
IO00280020all.indb7 2013/12/1816:12:48
②
③
①
②③ ①
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2- 5
VRF SYSTEMS Indoor Unit
2
2. Heating Standby
2. Heating Standby
In heating mode, the indoor fan speed decreases to prevent cold air discharge from the indoor unit. During this
time, (heating standby) is displayed on the remote controller.
①This condition occurs in the following cases.
・Thermostat OFF
・Defrosting operation
・Indoor heat exchanger liquid temperature (E1) < 28˚C and discharge air temperature < 25˚C just after
heating operation started
The fan speed may sometimes increase when this condition continues for 6 minutes.
②The fan mode increases when the heat exchanger liquid temperature (E1) or discharge air
temperature increases.
The fan mode is selected based on the discharge air temperature and E1 temperature as shown
in the below figure. If the E1 temperature and discharge air temperature are different, the higher
temperature is used.
The function of "HH" is identical to the automatic fan speed mode.
Operation
Discharge air
E1
32
Temprature ( )
30
28
26
20
16
29
27
25
23
17
13
*HH
STOP
L
STOP
STOP
LL
LL
STOP
STOP
LL
LL
L
L
L
L
H
LL LH
L
H
L
HH
L
H
Set
fan STOPLLLHH
speed
Operation
Discharge air
E1
Temprature ( )
26
20
16
1
0
-1
STOP STOPHfan speed
< FRESH AIR INTAKE MODE (Type E2) >
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VRF SYSTEMS Indoor Unit
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3. Automatic Fan Speed Control
3. Automatic Fan Speed Control
①The indoor fan mode is controlled as shown below during the automatic fan mode.
②The fan mode does not change for 3 minutes during cooling operation and 1 minute during heating
operation once it is changed.
③The values in the parenthesis are when the remote controller sensor is enabled.
+3
+2
+1
(deg)
Indoor fan mode HH HLHH
H
Cooling
Set temp.
Set temp.
(-1)-2
(-2)-4
(deg)
Indoor fan mode HH
H LHH
H
Heating
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VRF SYSTEMS Indoor Unit
2
4. Indoor Unit MOV Control
For details, refer to the Service Manual of Outdoor Unit.
The MOV is at 480 pulses in the following cases.
①At the time of factory shipment
②Just after the indoor unit power cord is connected.
5. Drain Pump Control
The drain pump operates in the following conditions.
①Cooling thermostat ON
②The float switch worked.
③The drain pump may often operate for a while when the cooling thermostat turns OFF or the indoor
unit is stopped.
④The drain pump can be turned on when the cooling thermostat is OFF if the setting is made to prevent
water collected in the drain pan for a long time. For details, refer to "5-2. Detailed Settings Function."
⑤The indoor unit heat exchanger liquid temperature (E1) is less than 0˚C when the cooling thermostat
is OFF or the indoor unit is stopped.
The drain pump operates for 20 minutes once it starts operating.
4. Indoor Unit MOV Control
5. Drain Pump Control
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VRF SYSTEMS Indoor Unit
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6. Automatic Heating / Cooling Control
6. Automatic Heating / Cooling Control
Control temp. for cooling 22˚C * 20°C (temperature set) + 2°C (*3)
* 20°C (temperature set) – 2°C (*3)
Remote controller display 20˚C
Control temp. for heating 18˚C
Operating mode change Shifted set temp.
Heating → Cooling 20 + 2 (*3) + 0.5 = 22.5°C or higher (*2)
Cooling → Heating 20 – 2 (*3) – 1.0 = 17°C or lower
1
2
This function is only valid as long as one indoor unit is installed within one refrigerant system or all indoor
units are controlled within a group control.
When operating in a group control, the sub-indoor units become the same operation mode of the main unit.
As for the indoor units in a group control, install them in the same air conditioning circumstances.
Use the temperature sensor which is built-in sensor of the indoor unit.
*2: Dur
*3: Correction temp. is different depending on the model.
See the right column [ Indoor item code "1E" ] under the section “15. Parameter”.
ing heating operation when the body sensor is used, a temperature shift is applied to the intake temperature
detected by the sensor, in consideration of the difference in temperature at the top and bottom of the room. (Refer
to the “Room Temperature Control” item.) If this intake shift temperature is 4°C, then the heating cooling change
occurs when the temperature detected by the body sensor is 26.5°C or higher.
4 Cooling (heating) operation does not change if the room temperature changes from area C A (or A C) within 10
minutes after the compressor turns OFF. (Monitoring mode is excepted.)
5When the heating/cooling change
occurs, the 4-way valve switches
approximately 30 to 50 seconds
after the compressor turns ON.
Control temp. for cooling
Control temp. for heating
Selected operating mode
Selected operating mode
Remote controller display
–2 deg
–1 deg
+1 deg
+3 deg
+2 deg
+2.5 deg
–3 deg
Thermostat ON ON
OFF ONOFFO
NO
NOFF ON OFF OFF
A
B
C
HeatingHeating Cooling
1When operation starts, heating or cooling is selected according to the set temperature and the room temperature.
Room temperature Set temperature + 1 Cooling
Set temperature – 1 < Room temperature Set temperature + 1 Monitoring mode (*1)
Room temperature < Set temperature – 1 Heating
*1: If the difference between the room temperature and set temperature is small when operation starts, the cooling
thermostat remains in standby status (OFF) until the temperature difference increases. When the temperature differ-
ence increases, either cooling operation or heating operation is selected. This standby status is known as “monitoring
mode.”
2 After operation starts in the selected operating mode, the set temperature is automatically shifted by +2°C (*3) (cooling
operation) or –2°C (*3) (heating operation).
Example: Temperature set on the remote controller is 20°C.
3 Operating mode changes (heating cooling, cooling heating) which occur during operation as a result of temperature
changes are handled as shown below.
Heating cooling: Room temperature Shifted set temperature (set temperature + 2°C (*3)) + 0.5°C
Cooling heating: Room temperature Shifted set temperature (set temperature – 2°C (*3)) – 1.0°C
Example: Temperature set on the remote controller is 20°C.
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VRF SYSTEMS Indoor Unit
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7. Discharge Air Temperature Control
Discharge air temperature is controlled using the indoor unit discharge air temperature sensor. The discharge
air temperature is set in the EEPROM on the PCB. The setting is different depending on the model.
Discharge air temperature setting (at the time of factory shipment)
Indoor unit type
Discharge air temperature setting
Cooling Heating
Y2, F2, M1, E2, K2, U2 12˚C 50˚C
E2 (FRESH AIR INTAKE MODE) 18˚C 45˚C
Condition for Thermostat ON →OFF under discharge air temperature control
①Temperature less than “Discharge air temperature setting – 2˚C” is continuously detected for 20
minutes in cooling mode
②Temperature more than “Discharge air temperature setting + 2˚C” is continuously detected for 20
minutes in heating mode
③Temperature less than “Discharge air temperature setting – 3.5˚C” is continuously detected for 7
minutes in cooling mode
④Temperature more than “Discharge air temperature setting + 3.5˚C” is continuously detected for 7
minutes in heating mode
There is no priority order between the room temperature control and discharge air temperature control.
Relation between thermostat ON / OFF and room temperature control / discharge air temperature control
Thermostat turns OFF: Either room temperature control or discharge air temperature control satisfies
thermostat OFF condition.
Thermostat turns ON: Both of room temperature control and discharge air temperature control satisfy
thermostat ON condition.
8. RAP Valve Kit Control
The RAP valve kit is sometimes used in the 2-Way system.
The RAP valve kit prevents refrigerant from collecting in the indoor heat exchanger when the indoor unit is
stopped. The following table shows the RAP valve kit operation.
Operating mode RAP valve kit
Stopped OFF
Fan OFF
Cooling Thermostat ON OFF
Thermostat OFF OFF
Heating Thermostat ON ON
Thermostat OFF OFF
7. Discharge Air Temperature Control
8. RAP Valve Kit Control
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9. Automatic Flap Control
10. Filter Sign
9. Automatic Flap Control
The flap position can be selected from 5 positions.
Operating mode Flap position
Cooling / Dry F1・F2・F3 *
Fan F1・F2・F3・F4・F5
Heating F1・F2・F3・F4・F5
* Type U2 can set the flap position F4 and F5
①The flap moves to the following position automatically when the indoor unit is stopped.
F0 (close): Types K1, K2, T2, U1, U2, Y2
F5: Models other than the above
②The flap closes once and moves to the set position when the operating mode is changed.
※If the flap position cannot be adjusted because of a problem, only the swing operation can be
used. Check the flap and flap motor.
※The swing operation can be set for the flap.
10. Filter Sign
①When accumulated operating time of the indoor unit reaches the set time, the filter sign appears on
the remote controller. Clean the filter.
See page 5-6.
②After cleaning the filter, press the filter button on the remote controller once. The filter sign turns off.
F1
F2
F3
F4 F5
F0
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