•“ 5. SPECIFICATIONS ” and
“ 12. PARTS LIST ” has been modified.
Note :
• This manual does not cover outdoor
units.
When serving them, please refer to
the service manual No.OC294
REVISED EDITION-B, OC261
REVISED EDITION-B and this
manual in a set.
The old refrigerant and lubricant in the existing piping
contains a large amount of chlorine which may cause the
lubricant deterioration of the new unit.
Use “low residual oil piping”
If there is a large amount of residual oil (hydraulic oil, etc.)
inside the piping and joints, deterioration of the lubricant
will result.
Use ESTR , ETHER or HAB as the lubricant to
coat flares and flange connection parts.
If large amount of mineral oil enter, that can cause
deterioration of refrigerant oil etc.
Use liquid refrigerant to charge the system.
If gas refrigerant is used to seal the system, the composition
of the refrigerant in the cylinder will change and performance
may drop.
Do not use a refrigerant other than R407C.
If another refrigerant (R22, etc.) is used, the chlorine in the
refrigerant may cause the lubricant deterioration.
Use a vacuum pump with a reverse flow check valve.
The vacuum pump oil may flow back into the refrigerant
cycle and cause the lubricant deterioration.
Store the piping to be used during installation
indoors with keep both ends sealed until just
before brazing.
(Store elbows and other joints in a plastic bag.)
If dust, dirt, or water enters the refrigerant cycle,
deterioration of the oil and compressor trouble may result.
Ventilate the room if refrigerant leaks during
operation. If refrigerant comes into contact with
a flame, poisonous gases will be released.
Gravimeter
Unit
SAFETY PRECAUTION
CAUTIONS RELATED TO NEW REFRIGERANT
Cautions for units utilizing refrigerant R407C
[1] Cautions for service
·After recovering the all refrigerant in the unit, proceed to working.
·Do not release refrigerant in the air.
·After completing the repair service, recharge the cycle with the specified amount of
liquid refrigerant.
[2] Refrigerant recharging
(1) Refrigerant recharging process
1Direct charging from the cylinder.
·R407C cylinder are available on the market has a syphon pipe.
·Leave the syphon pipe cylinder standing and recharge it.
(By liquid refrigerant)
(2) Recharge in refrigerant leakage case
·After recovering the all refrigerant in the unit, proceed to working.
·Do not release the refrigerant in the air.
·After completing the repair service, recharge the cycle with the specified amount of
liquid refrigerant.
4
Page 5
[3] Service tools
Use the below service tools as exclusive tools for R407C refrigerant.
No.Tool nameSpecifications
1Gauge manifold·Only for R407C.
·Use the existing fitting SPECIFICATIONS. (UNF7/16)
·Use high-tension side pressure of 3.43MPa·G or over.
2Charge hose·Only for R407C.
·Use pressure performance of 5.10MPa·G or over.
3Electronic scale
4Gas leak detector·Use the detector for R134a or R407C.
5Adapter for reverse flow check.·Attach on vacuum pump.
6Refrigerant charge base.
7Refrigerant cylinder.·For R407C·Top of cylinder (Brown)
·Cylinder with syphon
8Refrigerant recovery equipment.
5
Page 6
CAUTIONS RELATED TO NEW REFRIGERANT
Use new refrigerant pipes.
Make sure that the inside and outside of refrigerant piping is clean and it has no contamination
such as sulfur hazardous for use, oxides, dirt,
shaving particles, etc.
In addition, use pipes with specified thickness.
Store the piping to be used during installation
indoors and keep both ends of the piping sealed
until just before brazing. (Leave elbow joints, etc.
in their packaging.)
Use ester oil, ether oil or alkylbenzene oil (small
amount) as the refrigerant oil applied to flares
and flange connections.
In case of using the existing pipes for R22, be careful with
the followings.
· For RP4, 5 and 6, be sure to perform replacement opera tion before test run.
· Change flare nut to the one provided with this product.
Use a newly flared pipe.
· Avoid using thin pipes.
Charge refrigerant from liquid phase of gas
cylinder.
If the refrigerant is charged from gas phase, composition
change may occur in refrigerant and the efficiency will be
lowered.
Do not use refrigerant other than R410A.
If other refrigerant (R22 etc.) is used, chlorine in refrigerant can cause deterioration of refrigerant oil etc.
Use a vacuum pump with a reverse flow check
valve.
Vacuum pump oil may flow back into refrigerant cycle and
that can cause deterioration of refrigerant oil etc.
Use the following tools specifically designed for
use with R410A refrigerant.
The following tools are necessary to use R410A refrigerant.
Keep the tools with care.
If dirt, dust or moisture enter into refrigerant cycle, that can
cause deterioration of refrigerant oil or malfunction of compressor.
Do not use a charging cylinder.
If a charging cylinder is used, the composition of refrigerant will change and the efficiency will be lowered.
Flare tool
Electronic refrigerant
charging scale
Vacuum pump adaptor
Size adjustment gauge
Gauge manifold
Torque wrench
Gas leak detector
Charge hose
Tools for R410A
Contamination inside refrigerant piping can cause deterioration of refrigerant oil etc.
If dirt, dust or moisture enter into refrigerant cycle, that can
cause deterioration of refrigerant oil or malfunction of compressor.
If large amount of mineral oil enter, that can cause deterioration of refrigerant oil etc.
Ventilate the room if refrigerant leaks during
operation. If refrigerant comes into contact with
a flame, poisonous gases will be released.
Cautions for units utilising refrigerant R410A
[1] Cautions for service
(1) Perform service after collecting the refrigerant left in unit completely.
(2) Do not release refrigerant in the air.
(3) After completing service, charge the cycle with specified amount of refrigerant.
(4) When performing service, install a filter drier simultaneously.
Be sure to use a filter drier for new refrigerant.
[2] Additional refrigerant charge
When charging directly from cylinder
· Check that cylinder for R410A on the market is syphon type.
· Charging should be performed with the cylinder of syphon stood vertically. (Refrigerant is charged from liquid phase.)
6
Page 7
Unit
Gravimeter
[3] Service tools
Use the below service tools as exclusive tools for R410A refrigerant.
No.Specifications
1Gauge manifold·Only for R410A
·Use the existing fitting
·Use high-tension side pressure of 5.3MPa·G or over.
2Charge hose·Only for R410A
·Use pressure performance of 5.09MPa·G or over.
3Electronic scale
4Gas leak detector·Use the detector for R134a, R407C or R410A.
5Adaptor for reverse flow check·Attach on vacuum pump.
6Refrigerant charge base
7Refrigerant cylinder·Only for R410ATop of cylinder (Pink)
8Refrigerant recovery equipment
specifications
Cylinder with syphon
. (UNF1/2)
7
Page 8
PAR-20MAA
ON/OFF
CENTRALLY CONTROLLED
ERROR CODE
CLOCK
ON OFF
˚C
CHECK
CHECK MODE
FILTER
TEST RUN
FUNCTION
˚C
1Hr.
NOT AVAILABLE
STAND BY
DEFROST
FILTER
CHECK TEST
TEMP.
TIMER SET
This sets the ventilation fan speed.
VENTILATION button
Press this button to switch between
cool,
dry, automatic and heat modes.
OPERATION SWITCH button
This sets the room temperature. The
temperature setting can be performed
in 1: units
Setting range
Cooling 19: to 30:
Heating 17: to 28:
TEMP. ADJUSTMENT button
This switches between continuous
operation and the timer operation.
TIMER button
This switches between the operation
and stop modes each time it is pressed.
The lamp on this button lights during
operation.
ON/OFF button
Only press this button to perform an
inspection check or test operation.
Do not use it for normal operation.
CHECK-TEST RUN button
To switch the horizontal fan motion
ON and OFF.
(Not available for this model.)
LOUVER button
This adjusts the vertical angle of the
ventilation.
AIR DIRECTION button
This resets the filter service indication
display
FILTER button
This sets the current time, start time
and stop time.
TIME SETTING button
This sets the ventilation fan speed.
FAN SPEED button
4
Auto Air Swing Vane
Disperses airflow up and
down and adjusts the angle
of airflow direction.
Grille
Filter
Removes dust and pollutants
from intake air
Horizontal Air Outlet
Sets airflow of horizontal automatically
during cooling or dehumidifying.
Air Intake
Intakes air from room.
PART NAMES AND FUNCTIONS
● Indoor Unit
● Wired remote controller
On the controls are set, the same operation mode can be repeated by simply pressing the ON/OFF button.
● Operation buttons
8
Page 9
● Display
PAR-20MAA
ON/OFF
CENTRALLY CONTROLLED
ERROR CODE
CLOCK
ON OFF
˚C
CHECK
CHECK MODE
FILTER
TEST RUN
FUNCTION
˚C
1Hr.
NOT AVAILABLE
STAND BY
DEFROST
FILTER
CHECK TEST
TEMP.
TIMER SET
CENTRALLY
CONTROLLED display
This indicates when the unit is con-
trolled by optional features such as
central control type remote controller.
TIMER display
This indicates when the continuous
operation and time operation modes
are set.
It also display the time for the timer
operation at the same time as when
it is set.
OPERATION MODE display
This indicates the operation mode.
STANDBY display
The [STANDBY] symbol is only dis-
played from the time the heating
operation starts until the heated air
begins to blow.
DEFROST display
This indicates when the defrost oper-
ation is performed.
CLOCK display
The current time , start time and stop
time can be displayed in ten second
intervals by pressing the time switch
button. The start time or stop time is
always displayed during the timer
operation.
In this display example on the bottom left, a condition where all display lamps light is shown for explanation purposes although this differs
from actual operation.
AIR DIRECTION display
This displays the air direction.
AIR SPEED display
The selected fan speed is displayed.
ROOM TEMPERATURE display
The temperature of the suction air
is displayed during operation. The
display range is 8°C to 39°C. The
display flashes 8°C when the actual
temperature is less than 8°C and
flashes 39°C when the actual temperature is greater than 39°C.
Operation lamp
This lamp lights during operation,
goes off when the unit stops and
flashes when a malfunction occurs.
This display lights in the check mode
or when a test operation is performed.
CHECK MODE
TEST RUN
display
FILTER display
CHECK display
This indicates when a malfunction
has occurred in the unit which should
be checked.
SET TEMPERATURE display
This displays the selected setting
temperature.
Caution
●Only the Power display lights when the unit is stopped and power supplied to the unit.
●When the central control remote control unit, which is sold separately, is used the ON-OFF button, operation switch button
and TEMP. adjustment button do not operate.
●“NOTAVAILABLE” is displayed when the Air speed button is pressed. This indicates that this room unit is not equipped with
the fan direction adjustment function and the louver function.
●When power is turned ON for the first time, it is normal that “H0” is displayed on the room temperature indication (For max.
2minutes). Please wait until this “H0” indication disappear then start the operation.
POWER display
This lamp lights when electricity is
supplied to the unit.
This lamp lights when the filter need
to be cleaned.
9
Page 10
ON/OFF TEMP
FAN
VANE
TEST RUN
AUTO STOP
AUTO START
h
min
LOUVER
MODE
CHECK
RESETSETCLOCK
MODEL SELECT
NOT AVAILABLE
CHECK
TEST RUN
˚C
AMPM
AMPM
VANE CONTROL button
Used to change the air flow direction.
CLOCK button
RESET button
SET button
ON/OFF button
The unit is turned ON and OFF alternately
each time the button is pressed.
LOUVER button
This switch the horizontal fan motion ON
and OFF.
(Not available for this model.)
MODE SELECT button
Used to switch the operation mode between
cooling, drying, blowing, heating and auto
mode.
CHECK-TEST RUN button
Only press this button to perform an inspection check or test operation.
Do not use it for normal operation.
FAN SPEED SELECT button
Used to change the fan speed.
TIMER display
Displays when in timer operation or when
setting timer.
button
SET TEMPERATURE button sets any desired
room temperature.
CLOCK display
Displays the current time.
“ ” “ ” display
Displays the order of timer operation.
“ ” “ ” display
Displays whether timer is on or off.
w In case the outdoor unit is cool only type,
the heating mode is not available.
Buttons used to set the “hour and minute” of
the current time and timer settings.
h and min buttons
display
SET TEMP. display indicates desired temperature set.
display
FAN SPEED display indicates which fan
speed has been selected.
display
The vertical direction of air flow is indicated.
display
Blinks when model is selected.
display
Lights up while transmission to the indoor
unit is mode using switches.
display
CHECK&TEST RUN display indicates that
the unit is being checked or test-run.
display
OPERATION MODE display
Operation mode display indicates which operation mode is in effect.
TIMER CONTROL buttons
AUTO STOP (OFF timer): when this switch
is set, the air conditioner will be automatically stopped at the preset time.
AUTO START (ON timer): when this switch
is set, the air conditioner will be automatically started at the preset time.
The unit of pressure has been changed to MPa based on international SI system.
The conversion factor is : 1(MPa)=10.2(kgf/ff)
56
Page 57
Mode
PLA-RP3AA.UK
PLA-RP3AA1.UK
PLA-RP4AA.UK
PLA-RP4AA1.UK
PLA-RP5AA.UK
PLA-RP5AA1.UK
PLA-RP6AA.UK
PLA-RP6AA1.UK
28
4.9
7.4
30
6.6
8.9
30
6.6
8.9
Air flow
Air speed
Coverage range
m
3
/min.
m/sec.
m
20
4.0
5.7
14
2.8
4.0
18
3.6
5.2
18
3.6
5.2
PLA-RP1.6AA.UK
PLA-RP2AA.UK
PLA-RP2.5AA.UK
Capacity
TotalElectrical circuitRefrigerant circuitIndoor side
Input
Service Ref.
PLA-RP3AA.UK
PLA-RP3AA
W
kW
Cooling
7,700
3.42
PLA-RP4AA.UK
1.UK
PLA-RP4AA1.UK
Cooling
9,200
3.68
PLA-RP5AA1.UK
Cooling
13,300
5.09
PLA-RP6AA.UK
PLA-RP6AA
1.UK
Cooling
14,200
5.90
Indoor unit Service Ref.
Phase , Hz
Volts
Amperes
Outdoor unit Service Ref.
Phase , Hz
Volts
Amperes
Discharge pressure
Suction pressure
Discharge temperature
Condensing temperature
Suction temperature
Ref. pipe length
Intake air temperature
Discharge air temperature
Intake air temperature
side
Outdoor
SHF
BF
D.B.
W.B.
D.B.
D.B.
W.B.
PLA-RP3AA.UK
PLA-RP3AA
V
A
PU-P3VGAA.UK
PU-P3VGAA
PU-P3YGAA.UK
PU-P3YGAA
V
A
MPa
MPa
°C
°C
°C
m
°C
°C
°C
°C
°C
1 , 50
230
0.79
1/3 , 50
230/400
15.55/4.64
2.30
0.47
81
44
5
5
27
19
13.4
35
24
0.74
0.13
PLA-RP4AA.UK
PLA-RP4AA
1.UK
PU-P4VGAA.UK
PU-P4VGAA
1.UK
PU-P4YGAA.UK
1.UK
PU-P4YGAA
1 , 50
230
1.25
1/3 , 50
230/400
16.33/4.59
1.98
0.54
71
42
8
5
27
19
14.0
35
24
0.78
0.12
1.UK
PU-P5YGAA.UK
1.UK
PU-P5YGAA
1.UK
PLA-RP5AA
1 , 50
230
1.64
3 , 50
400
6.44
2.11
0.48
71
41
6
5
27
19
11.7
35
24
0.72
0.06
PLA-RP6AA.UK
1.UK
PLA-RP6AA1.UK
PU-P6YGAA.UK
1.UK
PU-P6YGAA1.UK
1 , 50
230
1.64
3 , 50
400
7.73
2.27
0.45
81
45
2
5
27
19
11.3
35
24
0.69
0.09
The unit of pressure has been changed to MPa based on international SI system.
The conversion factor is : 1(MPa)=10.2(kgf/ff)
6-5. OUTLET AIR SPEED AND COVERAGE RANGE
w The air coverage range is the value up to the position where the air speed is 0.25m/sec.
When air is blown out horizontally from the unit at the Hi notch position.
The coverage range should be used only as a general guideline since it varies according to the size of the room and the
furniture inside the room.
57
Page 58
PLA-RP1.6AA.UKPLA-RP2AA.UK
PLA-RP2.5AA.UK
NOTCH SPL(dB)LINE
High
Medium1
Medium2
Low
High
Medium1
Medium2
Low
31
29
28
27
NOTCH SPL(dB)LINE
33
31
29
28
90
80
70
60
50
40
30
20
10
631252505001000200040008000
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)
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
BAND CENTER FREQUENCIES, Hz
6-6. NOISE CRITERION CURVES
PLA-RP3AA.UK
PLA-RP3AA
1.UK
PLA-RP4AA.UK
PLA-RP4AA1.UK
NOTCH SPL(dB)LINE
34
32
30
28
NOTCH SPL(dB)LINE
41
39
36
33
90
80
70
60
50
40
30
20
10
631252505001000200040008000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
BAND CENTER FREQUENCIES, Hz
90
80
70
60
50
40
30
20
10
631252505001000200040008000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
BAND CENTER FREQUENCIES, Hz
High
Medium1
Medium2
Low
High
Medium1
Medium2
Low
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
90
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
631252505001000200040008000
58
BAND CENTER FREQUENCIES, Hz
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
Page 59
PLA-RP5AA.UK
PLA-RP5AA
1.UK
NOTCH SPL(dB)LINE
High
Medium1
Medium2
Low
45
43
40
37
PLA-RP6AA.UK
PLA-RP6AA1.UK
NOTCH SPL(dB)LINE
High
Medium1
Medium2
Low
45
43
40
37
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
90
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
631252505001000200040008000
BAND CENTER FREQUENCIES, Hz
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
[Servicing]
Fasten terminal of the terminal board "TB4" equips lock system.
To remove the fastened terminal, pull it while pressing the protruding portion (locking lever) of
the terminal. The fastened terminal protruding portion should face upward.
NOTES:
1.Since the outdoor side electric wiring may change be sure to
check the outdoor unit electric wiring for servicing.
2.Indoor and outdoor connecting wires are made with polarities, make
wiring matching terminal numbers (S1,S2,S3).
3.Symbols used in wiring diagram above are, :Connector, :Terminal (block).
Please set the voltage using
the remote controller.
For the setting method, please
refer to the indoor unit Installation
Manual.
Judge what is wrong and take a corrective action according to 10-2.“Self-diagnosis action table”.
Conduct trouble shooting and ascertain the cause of the
inferior phenomenon according to 10-3.“Trouble shooting
by inferior phenomena”.
The inferior phenomenon is
not reoccurring.
Logged
Not logged
1Consider the temporary defects such as the work of
protection devices in the refrigerant circuit including
compressor, poor connection of wiring, noise and etc.
Re-check the symptom, and check the installation en vironment, refrigerant amount, weather when the infe rior phenomenon occurred, matters related to wiring
and etc.
2Reset error code logs and restart the unit after finishing
service.
3There is no abnormality concerning of parts such as
electrical component, controller board, remote controll er and etc.
1Recheck the abnormal symptom.
2Conduct trouble shooting and ascertain the cause of
the inferior phenomenon according to 10-3.“Trouble
shooting by inferior phenomena”.
3Continue to operate unit for the time being if the cause
is not ascertained.
4There is no abnormality concerning of parts such as el ectrical component, controller board, remote controller
and etc.
TROUBLESHOOTING
10-1. TROUBLESHOOTING
<Error code display by self-diagnosis and actions to be taken for service (summary)>
Present and past error codes are logged and displayed on the wired remote controller and control board of outdoor unit.
Actions to be taken for service, which depends on whether or not the inferior phenomenon is reoccurring at service, are summarised in the table below. Check the contents below before investigating details.
Note : Refer to the manual of outdoor unit for malfunction-diagnosis method by remote controller.
63
Page 64
10-2. SELF-DIAGNOSIS ACTION TABLE
Error Code
P1
P2
Meaning of error code and detection method
Abnormality of room temperature
thermistor (TH1)
1 The unit is in three-minute resume
prevention mode if short/open of
thermistor is detected. Abnormal if the
unit does not reset normally after three
minutes. (The unit returns to normal
operation, if it has normally reset.)
2 Constantly detected during cooling,
drying, and heating operation.
Short: 90: or more
Open: -40: or less
Abnormality of pipe temperature
thermistor/Liquid (TH2)
1 The unit is in three-minute resume
prevention mode if short/open of
thermistor is detected. Abnormal if the
unit does not reset normally after three
minutes. (The unit returns to normal
operation, if it has normally reset.)
2 Constantly detected during cooling,
drying, and heating (except defrosting)
operation.
Short: 90: or more
Open: -40: or less
1 Defective thermistor
2 Contact failure of connector
3 Breaking of wire or contact
4 Defective indoor controller
1 Defective thermistor
2 Contact failure of connector
3 Breaking of wire or contact
4 Defective refrigerant circuit is
5 Defective indoor controller board.
Note: Refer to the manual of outdoor unit for the details of display
such as F, U, and other E.
Case
characteristics.
(CN20) on the indoor controller
board. (Insert failure)
failure of thermistor wiring.
board.
characteristics.
(CN21) on the indoor controller
board. (Insert failure)
failure of thermistor wiring.
causing thermistor temperature
of 90: or more or -40: or
less.
Judgment and action
1–3 Check resistance value of thermistor.
0: ······15.0k"
10: ····9.6k"
20: ····6.3k"
30: ····4.3k"
40: ····3.0k"
If you put force on (draw or bend) the lead wire
with measuring resistance value of thermistor
breaking of wire or contact failure can be
detected.
2 Check contact failure of connector (CN20) on
the indoor controller board. Refer to 10-6-2.
Put the power on again and check restart
after inserting connector again.
4 Check room temperature display on remote
controller.
Replace indoor controller board if there is
abnormal difference with actual room
temperature.
There is no abnormality if none of above
comes within the unit.
Put the power off, and on again to operate.
1–3 Check resistance value of thermistor.
For characteristics, refer to (P1) above.
2 Check contact failure of connector (CN21) on
the indoor controller board. Refer to 10-6-2.
Put the power on and check restart after
inserting connector again.
4 Check pipe <liquid> temperature with remote
controller in test run mode. If pipe <liquid>
temperature is exclusively low (in cooling
mode) or high (in heating mode), refrigerant
circuit may have defective.
5 Check pipe <liquid> temperature with remote
controller in test run mode. If there is exclusive
difference with actual pipe <liquid> temperature,
replace indoor controller board. There is no
abnormality if none of above comes within the
unit.
Put the power off, and on again to operate.
P4
P5
Abnormality of drain sensor (DS)
1 Suspensive abnormality, if short/open of
thermistor is detected for 30 seconds
continuously.
Put off compressor and indoor fan.
2 Short/open is detected for 30 seconds
continuously during suspensive
abnormality.
(The unit returns to normal operation,
if it has normally reset.)
3 Detect the following condition.
• During cooling and drying operation.
• In case that pipe <liquid> temperature
- room temperature <-10deg
(Except defrosting)
• When pipe <liquid> temperature or
room temperature is short/open
temperature.
• During drain pomp operation.
Malfunction of drain pump (DP)
1 Suspensive abnormality, if thermistor of
drain sensor is let heat itself and temperature rises slightly. Put off compressor and indoor fan.
2 Drain pomp is abnormal if the condition
above is detected during suspensive
abnormality.
3 Constantly detected during drain pomp
operation.
1 Defective thermistor
characteristics
2 Contact failure of connector
(CN31) on the indoor controller
board. (Insert failure).
3 Breaking of wire or contact
failure of drain sensor wiring.
4 Defective indoor controller board.
1 Malfunction of drain pump
2 Defective drain
Clogged drain pump
Clogged drain pipe
3 Attached drop of water at the
drain sensor
• Drops of drain trickles from
lead wire.
• Clogged filter is causing
wave of drain.
4 Defective indoor controller board.
1–3 Check resistance value of thermistor.
0: ······6.0k"
10: ····3.9k"
20: ····2.6k"
30: ····1.8k"
40: ····1.3k"
2 Check contact failure of connector (CN31) on
the indoor controller board. Refer to 10-6-2.
Put the power on again and check restart
after inserting connector again.
4 Replace indoor controller board if drain
pump operates with the line of drain sensor
connector CN31-1 and 2 is short-circuited,
and abnormality reappears.
There is no abnormality if none of above
comes within the unit. Put the power off, and
on again to operate.
1 Check if drain-up machine works.
2 Check drain function.
3 Check the setting of lead wire of drain sensor
and check clogs of the filter.
4 Replace indoor controller board if drain
pump operates with the line of drain sensor
connector CN31-1 and 2 is short-circuited
and abnormality reappears.
Refer to 10-6-2.
There is no abnormality if none of above
comes within the unit. Put the power off, and
on again to operate.
64
Page 65
Error Code
P6
Meaning of error code and detection method
Freezing/overheating protection is
working
1 Freezing protection (Cooling mode)
The unit is in six-minute resume prevention
mode if pipe <liquid or condenser/evap-
(Cooling or drying mode)
1 Clogged filter (reduced airflow)
2 Short cycle of air path
3 Low-load (low temperature)
orator> temperature stays under
-15: for three minutes, three minutes
after the compressor started. Abnormal
if it stays under -15: for three minutes
again within 16 minutes after six-minute
4 Defective indoor fan motor
• Fan motor is defective.
• Indoor controller board is
resume prevention mode.
2 Overheating protection (Heating mode)
The units is in six-minute resume
prevention mode if pipe <condenser /
evaporator> temperature is detected as
over 74: after the compressor started.
Abnormal if the temperature of over
5 Overcharge of refrigerant
6 Defective refrigerant circuit
74: is detected again within 10 minutes
after six-minute resume prevention
mode.
(Heating mode)
1 Clogged filter (reduced airflow)
2 Short cycle of air path
3 Over-load (high temperature)
4 Defective indoor fan motor
• Fan motor is defective.
• Indoor controller board is
5 Overcharge of refrigerant
6 Defective refrigerant circuit
7 Bypass circuit of outdoor unit
Case
operation beyond the tolerance
range
defective.
(clogs)
operation beyond the tolerance
range
defective.
(clogs)
is defective.
Judgment and action
(Cooling or drying mode)
1 Check clogs of the filter.
2 Remove shields.
4 Measure the resistance of fan motor's winding.
Measure the output voltage of fan's connector
(FAN) onthe indoor controller board.
WThe indoor controller board should be
normal when voltage of AC 100~240V is
detected while fan motor is connected.
Refer to 10-6-2.
56 Check operating condition of refrigerant
circuit.
(Heating mode)
1 Check clogs of the filter.
2 Remove shields.
4 Measure the resistance of fan motor's
winding.
Measure the output voltage of fan's connector
(FAN) on the indoor controller board.
WThe indoor controller board should be
normal when voltage of AC 100~240V is
detected while fan motor is connected.
Refer to 10-6-2.
5~7Check operating condition of refrigerant
circuit.
P8
Abnormality of pipe temperature
<Cooling mode>
Detected as abnormal when the pipe temperature is not in the cooling range 3 minutes later of compressor start and 6 minutes later of the liquid or condenser/evaporator pipe is out of cooling range.
Note 1) It takes at least 9 min. to detect.
Note 2) Abnormality P8 is not detected in
drying mode.
Cooling range : Indoor pipe temperature
(TH2 or TH5) – intake temperature
(TH1) [ -3 deg
TH: Lower temperature between: liquid
pipe temperature and condenser/
evaporator temperature
<Heating mode>
When 10 seconds have passed after the
compressor starts operation and the hot
adjustment mode has finished, the unit is
detected as abnormal when
condenser/evaporator pipe temperature is
not in heating range within 20 minutes.
between indoor room
temperature and pipe <liquid
or condenser / evaporator>
temperature thermistor
• Shortage of refrigerant
• Disconnected holder of pipe
<liquid or condenser /
evaporator> thermistor
• Defective refrigerant circuit
2 Converse connection of
extension pipe (on plural units
connection)
3 Converse wiring of indoor/
outdoor unit connecting wire
(on plural units connection)
4 Defective detection of indoor
room temperature and pipe
<condenser / evaporator>
temperature thermistor
5 Stop valve is not opened
completely.
1~4Check pipe <liquid or condenser /
evaporator> temperature with room
temperature display on remote
controller and outdoor controller circuit
board.
Pipe <liquid or condenser / evaporator>
temperature display is indicated by
setting SW2 of outdoor controller circuit
board as follows.
Conduct temperature check with outdoor
controller circuit board after connecting
(
‘A-Control Service Tool(PAC-SK52ST)’.
Temperature display of indoor liquid pipe
Indoor 1
123456
Temperature display of indoor liquid pipe
Indoor 2
123456
A-Control Service Tool SW2 setting
Temperature display of indoor condenser/
evaporator pipe Indoor 1
ON
OFF
ON
OFF
123456
Temperature display of indoor condenser/
evaporator pipe Indoor 2
123456
23Check converse connection of extension
pipe or converse wiring of indoor/outdoor
unit connecting wire.
)
ON
OFF
ON
OFF
65
Page 66
Error Code
123456
ON
OFF
123456
ON
OFF
A-Control Service Tool SW2 setting
Temperature display of indoor condenser/
evaporator pipe Indoor 1
Temperature display of indoor condenser/
evaporator pipe Indoor 2
P9
Meaning of error code and detection method
Abnormality of pipe temperature thermistor / Condenser-Evaporator (TH5)
1 The unit is in three-minute resume pro-
tection mode if short/open of thermistor
is detected. Abnormal if the unit does
not get back to normal within three minutes. (The unit returns to normal operation, if it has normally reset.)
2 Constantly detected during cooling, dry-
ing, and heating operation (except
defrosting)
Short: 90: or more
Open: -40: or less
1 Defective thermistor
2 Contact failure of connector
3 Breaking of wire or contact
4 Temperature of thermistor is
5 Defective indoor controller
Case
characteristics
(CN29) on the indoor controller
board. (Insert failure)
failure of thermistor wiring.
90: or more or -40: or less
caused by defective refrigerant
circuit.
board.
Judgment and action
1–3 Check resistance value of thermistor.
For characteristics, refer to (P1) above.
2 Check contact failure of connector (CN29)
on the indoor controller board.
Refer to 10-6-2.
Put the power on and check restart after
inserting connector again.
4 Operate in test run mode and check pipe
<condenser / evaporator> temperature with
outdoor controller circuit board. If pipe
<condenser / evaporator> temperature is
exclusively low (in cooling mode) or high (in
heating mode), refrigerant circuit may have
defective.
5 Operate in test run mode and check pipe
<condenser / evaporator> temperature with
outdoor control circuit board. If there is
exclusive difference with actual pipe
<condenser / evaporator> temperature
replace indoor controller board.
There is no abnormality if none of above
comes within the unit.
Put the power off and on again to operate.
In case of checking pipe temperature
with outdoor controller circuit board,
be sure to connect A-control service
(
tool (PAC-SK52ST).
)
E4
E5
E6
E7
Remote controller signal receiving error
1 Abnormal if indoor controller board can
not receive normally any data from
remote controller or from other indoor
controller board for three minutes.
2 Indoor control board cannot receive any
signal from remote controller for two
minutes.
Remote controller transmitting error
1 Abnormal if indoor controller board cannot
check the blank of transmission path for
three minutes.
2 Abnormal if indoor controller board cannot
finish transmitting 30 times consecutively.
Indoor/outdoor unit communication
error (Signal receiving error)
1 Abnormal if indoor controller board
cannot receive any signal normally for
six minutes after putting the power on.
2 Abnormal if indoor controller board
cannot receive any signal normally for
three minutes.
3 Consider the unit abnormal under the
following condition: When two or more
indoor units are connected to one
outdoor unit, indoor controller board
cannot receive a signal for three minutes
from outdoor controller circuit board, a
signal which allows outdoor controller
circuit board to transmit signals.
Indoor/outdoor unit communication
error (Transmitting error)
Abnormal if “1” receiving is detected 30
times continuously though indoor controller
board has transmitted “0”.
1 Contact failure at transmission
wire of remote controller
2 All remote controllers are set
as “sub” remote controller. In
this case, E0 is displayed on
remote controller, and E4 is
displayed at LED (LED1, LED2)
on the outdoor controller circuit
board.
3 Defective transmitting receiving
circuit of remote controller
4 Defective transmitting receiving
circuit of indoor controller board.
5 Noise has entered into the
transmission wire of remote
controller.
1 Defective transmitting receiving
circuit of indoor controller board.
2 Noise has entered into the
transmission wire of remote
controller.
1 Contact failure, short circuit or,
mis-wiring (converse wiring) of
indoor/outdoor unit connecting
wire
2 Defective transmitting receiving
circuit of indoor controller board
3 Defective transmitting receiving
circuit of indoor controller board
4 Noise has entered into indoor/
outdoor unit connecting wire.
1 Defective transmitting receiving
circuit of indoor controller board
2 Noise has entered into power
supply.
3 Noise has entered into outdoor
control wire.
66
1 Check disconnection or looseness of indoor
unit or transmission wire of remote controller.
2 Set one of the remote controllers “main”.
If there is no problem with the action above.
3 Diagnose remote controllers.
a) When “RC OK” is displayed,
Remote controllers have no problem.
Put the power off, and on again to check.
If abnormality generates again, replace
indoor controller board.
b) When “RC NG” is displayed,
Replace remote controller.
c) When “RC E3” is displayed,
d) When “ERC 00-06” is displayed,
[ c),d)➜Noise may be causing abnormality. ]
✽ If the unit is not normal after replacing
indoor controller board in group control,
indoor controller board of address “0”
may be abnormal.
12 Put the power off, and on again to check.
If abnormality generates again, replace
indoor controller board.
✽ Check LED display on the outdoor control
circuit board. (Connect A-control service tool,
PAC-SK52ST.)
Refer to EA-EC item if LED displays EA-EC.
1 Check disconnection or looseness of indoor/
outdoor unit connecting wire of indoor unit or
outdoor unit.
Check all the units in case of twin triple
indoor unit system.
2-4 Put the power off, and on again to check.
If abnormality generates again, replace
indoor controller board or outdoor
controller circuit board.
✽ Other indoor controller board may have
defective in case of twin triple indoor unit
system.
1-3 Put the power off, and on again to check.
If abnormality generates again, replace
indoor controller board.
Page 67
10-3. TROUBLESHOOTING BY INFERIOR PHENOMENA
Note: Refer to the manual of outdoor unit for the detail of remote
controller.
Phenomena
(1)LED2 on indoor controller board
is off.
• When LED1 on indoor controller board is also off.
1 Power supply of 220~240V is not supplied to outdoor
unit.
2 Defective outdoor controller circuit board.
3 Power supply of 220~240V is not supplied to indoor
unit.
4 Defective indoor power board.
5 Defective indoor controller board.
Factor
Countermeasure
1 Check the voltage of outdoor power
supply terminal block (L, N)
• When AC 220~240V is not detected.
Check the power wiring to outdoor unit
and the breaker.
• When AC 220~240V is detected.
—Check 2 (below).
2 Check the voltage between outdoor
terminal block S1 and S2.
• When AC 220~240V is not detected.
Check the fuse on outdoor controller
circuit board (10A).
Check the wiring connection.
• When AC 220~240V is detected.
—Check 3 (below).
3 Check the voltage between indoor terminal
block S1 and S2.
• When AC 220~240V is not detected.
Check indoor/outdoor unit connecting
wire for mis-wiring.
• When AC 220~240V is detected.
—Check 4 (below).
4 Check voltage output from CN2S on indoor
power board (DC14V). Refer to 10-6-1.
• When no voltage is output.
Check the fuse on indoor power board.
Check the wiring connection.
• When output voltage is between 12V
and 16V.
—Check 5 (below).
5 Check the wiring connection between
indoor controller board and indoor power
board. If no problems are found, indoor
controller board is defective.
(2)LED2 on indoor controller board
is blinking.
(3)Upward/downward vane perfor-
mance failure
• When LED1 on indoor controller board is lit.
1 Mis-setting of refrigerant address for outdoor unit
(There is no unit corresponding to refrigerant
address “0”.)
• When LED1 on indoor controller board is also blinking.
Connection failure of indoor/outdoor unit connecting
wire
• When LED1 is lit.
Mis-wiring of remote controller wires
Under twin triple indoor unit system, 2 or more indoor
units are wired together.
1 Refrigerant address for outdoor unit is wrong or not
set.
Under grouping control system, there are some units
whose refrigerant address is 0.
2 Short-cut of remote controller wires
3 Defective remote controller
1 The vane is not downward during defrosting and
heat preparation and when the thermostat is OFF in
HEAT mode. (Working of COOL protection function)
2 Vane motor does not rotate.
• Defective vane motor
• Breaking of wire or connection failure of connector
3 Upward/downward vane does not work.
• The vane is set to fixed position.
1 Reconfirm the setting of refrigerant
address for outdoor unit
Set the refrigerant address to “0”.
(For grouping control system under
which 2 or more outdoor units are
connected, set one of the units to “0”.)
Set refrigerant address using SW1
on outdoor controller circuit board.
Check indoor/outdoor unit connecting wire
for connection failure. Check the connection
of remote controller wires in case of twin
triple indoor unit system. When 2 or more
indoor units are wired in one refrigerant
system, connect remote controller wires to
one of those units.
1 Check the setting of refrigerant address
in case of grouping control system.
If there are some units whose refrigerant
addresses are 0 in one group, set one of
the units to 0 using SW1 on outdoor
controller circuit board.
23 Remove remote controller wires and
check LED2 on indoor controller board.
• When LED2 is blinking, check the
short-cut of remote controller wires.
• When LED2 is lit, connect remote
controller wires again and:
if LED2 is blinking, remote controller
is defective; if LED2 is lit, connection
failure of remote controller terminal
block etc. has returned to normal.
1 Normal operation (The vane is set to hor-
izontal regardless of remote control.)
2 Check 2 (left).
• Check the vane motor. (Refer to “How
to check the parts”.)
• Check for breaking of wire or connection failure of connector.
3 Normal operation (Each connector on
vane motor side is disconnected.)
67
Page 68
10-4. EMERGENCY OPERATION
Receiver
Operation lamp
Emergency operation switch (cooling)
Emergency operation switch (heating)
Mode
Cooling
Heating
Set temperature
Fan speed
Airflow direction
24:
High
Downward (70deg)
24:
High
Horizontal (30deg)
wEmergency operation will be performed as follows.
10-4-1. When wireless remote controller troubles or its battery is exhausted
1. Emergency operation is available in such a case using emergency operation switch equipped next to the receiver of indoor
unit.
2. To start operation
• Cooling Operation·······Press (Cooling) switch.
• Heating Operation·······Press (Heating) switch.
wWhen the unit starts operating, the operation lamp is lit.
3. To stop operation
• Press either emergency operation switch (cooling/heating).
10-4-2. When wired remote controller or indoor unit micro computer troubles
1. If there is not any other wrong when trouble occurs, emergency operation starts as the indoor controller board switch (SWE)
is set to ON.
During the emergency operation the indoor unit is as follows;
(1) Indoor fan high speed operation(2) Drain pump operation
2. When emergency operating for COOL or HEAT, setting of the switch (SWE) in the indoor controller board and outdoor unit
emergency operation are necessary.
3. Check items and notices as the emergency operation
(1) Emergency operation cannot be used as follows;
• When the outdoor unit is something wrong.
• When the indoor fan is something wrong.
• When drain over flow protected operation is detected during self-diagnosis. (Error code : P5)
(2) Emergency operation will be serial operation by the power supply ON/OFF.
ON/OFF or temperature, etc. adjustment is not operated by the remote controller.
(3) Do not operate for a long time as cold air is blown when the outdoor unit starts defrosting operation during heat emer-
gency operation.
(4) Cool emergency operation must be within 10 hours at most. It may cause heat exchanger frosting in the indoor unit.
(5) After completing the emergency operation, return the switch setting, etc. in former state.
(6) Since vane does not work at emergency operation, position the vane manually and slowly.
68
Page 69
10-5. HOW TO CHECK THE PARTS
Parts nameCheck points
Disconnect the connector then measure the resistance using a tester.
(Surrounding temperature 10:~30:)
Measure the resistance between the terminals using a tester.
(Surrounding temperature20:)
Measure the resistance between the terminals using a tester.
(Winding temperature 20:)
Measure the resistance between the terminals using a tester.
Measure the resistance after 3 minutes have passed since the power supply was intercepted.
(Surrounding temperature 0:~60:)
Vane motor
Drain pump
Drain sensor
(Refer to the thermistor)
(Refer to the thermistor)
Room temperature
thermistor (TH1)
Pipe temperature
thermistor/liquid(TH2)
Condenser/Evaporator
temperature thermistor
(TH5)
1
2
Red
Red
1
2
3
Normal
4.3k"~9.6k"
Abnormal
Open or short
Abnormal
Open or short
Normal
0.6k"~6.0k"
NormalAbnormal
15k"Open or short
NormalAbnormal
290"Open or short
Measure the resistance between the terminals using a tester.
(Winding temperature 20:)
CN02
Connect to the indoor
controller board (CN03)
Between 1 and 2 0~24V DC
(Indoor/Outdoor transmission)
Between 2 and 3 220~240V AC
+
}
–
CN2S
Connect to the indoor controller
–
board (CN2D)
}
+
(12~16V DC)
–
+
}
CN01
Connect to the Terminal Block (TB4)
(Indoor/outdoor connecting line)
Between 1 and 2 220~240V AC
Between 2 and 3 0~24V DC
(Indoor/outdoor transmission)
CN03
Connect to the indoor
power board (CN02)
Between 1 to 3 220~240V AC
Between 3 to 5 0~24V DC
(Indoor/outdoor transmission)
CNC
Dew prevention heater (H2)
Between 1 to 3 220~240V AC
}
–
Connector
(Remote switch)
CN90
Connect to the wireless
remote controller board
(CNB)
CN2D
Connect to the indoor
power board (CN2S)
12~16V DC
}
–
+
CN22
Connect to the terminal block(TB5)
(Remote controller connecting wire)
(10~16V DC)
}
+
–
CN21
Pipe temperature
thermistor/Liquid (TH2)
CN20
Room temperature
thermistor (TH1)
CN2L
Connector (LOSSNAY)
CN41
Connector (HA terminal-A)
CN31
Drain sensor (DS)
CN29
Condenser/evaporator
temperature thermistor (TH5)
+
CN25
}
Humidifier output
–
(12~16V DC)
CNP
Drain-up machine output (DP)
Between 1 to 3 220~240V AC
FAN
Fan motor output (MF)
Between 1 to 5 100~240V AC
Jumper connector J11~J15
Unit setting
Jumper connector J21~J24
Capacity setting
SWE
Emergency operation
72
Page 73
10-7. FUNCTIONS OF JUMPER WIRE
J11~J15
(SW1)
Open/short of jumper wire
Functions
Jumper wire
Model
settings
Capacity
settings
Pair number
setting with
wireless
remote
controller
Heater-less
Models : PLA-RP1.6~6
Remarks
J11 J12 J13 J14 J15
RP1.6AA
RP2AA
RP2.5AA
RP3AA,AA1
RP4AA,AA1
RP5AA
RP5
AA1
RP6
AA,AA1
J21 J22 J23 J24
J21~J24
(SW2)
J41
J42
0
1
2
3 ~ 9
Wireless remote
controller setting
Control PCB setting
J41J42
<Settings at time of factory shipment>
Wireless remote controller: 0
Control PCB: (for both J41 and J42)
Four pair number settings are supported.
The pair number settings of the wireless remote
controller and indoor control PCB (J41/J42) are
given in the table on the left.
(' ' in the table indicates the jumper line is disconnected.)
(Marks in the table below) Jumper wire ( : Short : Open)
DIP switch ( : ON : OFF)
Models
Each function is controlled by the jumper wire on control p.c. board. For service parts, J11- J15 and J21-J24, DIP switches
(SW1 and SW2) are equipped with jumper wire.
(1) Slide the knob of air intake grille toward the arrow 1 to
open the air intake grille.
(2) Remove drop prevention hook from the panel.
(3) Slide the shaft in the hinge to the direction of the arrow 2
and remove the air intake grille.
2. Removing the fan guard
(1) Open the air intake grille.
(2) Remove the 3 screws of fan guard.
3. Removing the room temperature thermistor
(1)Remove the fan guard.(See photo 1)
(2) Remove the screw in the room temperature thermistor
holder to remove the holder and the room temperature
thermistor.
(3) Remove the 1 screw from the bell mouth, and unscrew the
other 2 screws (fix to the oval hole which has a different
diameter) to remove the bell mouth.
(4) Remove the holder claw, and remove the room tempera-
ture thermistor and holder.
(5) Disconnect the connector (red) from the indoor control
board.
PHOTOS & ILLUSTRATIONS
Figure 1
Air intake grille
Air intake grille knob
Photo 1
Fan guard
Photo 2
Bell mouth
Grille
Screws
Air intake
grille
Screws
Room
temperature
thermistor
Air intake grille
4. Removing the electrical box
(1) Remove the fan guard.(See photo 1)
(2) Remove the lead wire of the vane motor from the clamp,
and disconnect the white connector (10P).
(3) Remove the room temperature thermistor with the holder.
(4) Remove the bell mouth.(See photo 2)
(5) Disconnect the relay connector in the electrical box.
Red (3P) for fan motor power supply
White (2P) for pipe temperature detecting thermistor
Black (2P) for condenser/evaporator pipe temperature
detecting thermistor
Blue (2P) for drain pump
White (3P) for drain sensor
(6) Remove the 3 screws of the electrical box and loosen the
other 2 screws to remove the box.
<Electrical parts in the electrical box>
Indoor controller board
Power supply board
Terminal block
Capacitor
74
Photo 3
Electrical box
Indoor
controller
board
Connector
Power supply
board
Terminal
block
Capacitor
Turbo fan
Nut
Page 75
OPERATING PROCEDURE
PHOTOS & ILLUSTRATIONS
5. Removing the fan motor
(1) Remove the fan guard.(See photo 1)
(2) Remove the bell mouth.(See photo 2)
(3) Remove the electrical box.(See photo 3)
(4) Remove the turbo fan nut.
(5) Pull out the turbo fan.
(6) Disconnect the connector of the fan motor lead wire.
(7) Remove the 4 nuts of the fan motor.
6. Removing the pipe temperature thermistor
and condenser evaporator temperature thermistor
(1) Remove the fan guard.(See photo 1)
(2) Remove the bell mouth.(See photo 2)
(3) Remove the electrical box.(See photo 3)
(4) Remove the turbo fan.
(5) Remove the screw of the service panel.
(6) Remove the service panel.
(7) Remove the pipe temperature thermistor which are
inserted into the holder installed to the thin copper pipe.
(8) Disconnect the 2-pin white connector.
Photo 4
Photo 5
Fan motor
Nut
Pipe temperature thermistor
Connector
Nut
7. Removing the panel
(1) Remove the air intake grille.(See figure 1)
Corner panel (See figure 2)
(1) Remove the corner screw.
(2) Slide the corner panel to the direction of the arrow 3, and
remove the corner panel.
Panel (See photo 6)
(1) Disconnect the connector that connects with the unit.
(2) Remove the 2 screws from the panel and loosen another 2
screws, which fix to the oval holes, have different diameters.
(3) Rotate the panel a little to remove the panel.
8. Removing the drain pan
(1) Remove the panel. (See photo 6)
(2) Remove the drain plug (Larger one), drain the remaining
water in the drain pan.
(3) Remove the corner cover. (2 screws)
(4) Remove the bell mouth. (See photo 2)
(5) Remove the electrical box. (See photo 3)
(6) Remove the lead wire holder. (1 screw)
(7) Remove the 4 screws and pull out the drain pan.
w Pull out the left and right of the pan gradually.
Be careful not to crack or damage the pan.
Figure 2
Corner
panel
Photo 6
Connector
Screws
Photo 7
Screw
Drain pan
Screw
Service access
Screw
Corner
panel
Panel
Screws
Panel
Screw
Screw
75
Lead
wire
holder
Drain plug(Larger)
Corner cover
Page 76
OPERATING PROCEDURE
PHOTOS & ILLUSTRATIONS
9. Removing the drain pump and drain sensor
(1) Remove the panel. (See photo 6)
(2) Remove the fan guard. (See photo 1)
(3) Remove the bell mouth. (See photo 2)
(4) Remove the electrical box. (See photo 3)
(5) Remove the drain pan. (See photo 7)
(6) Remove the 3 screws of the drain pump.
(7) Cut the drain hose band, pull out the drain hose from the
drain pump.
(8) Pull out the drain pump.
(9) Remove the drain sensor and the holder.
10. Removing the heat exchanger
(1) Remove the panel. (See photo 6)
(2) Remove the fan guard. (See photo 1)
(3) Remove the bell mouth. (See photo 2)
(4) Remove the electrical box. (See photo 3)
(5) Remove the drain pan. (See photo 7)
(6) Remove the turbo fan. (See photo 4)
(7) Remove the 3 screws of the piping cover, and pull out
piping cover.
(8) Remove the 4 screws of the outer wall cover, and pull out
the outer wall cover.
(9) Remove the screw of the coil support.
(10) Remove the 2 screws of the coil.
(11) Pull out the heat exchanger.
BASE
LEG
DRUM 1 ASSY
LEG
TURBO FAN
SPL WASHER / NUT
HEAT EXCHANGER
HEAT EXCHANGER
PIPE TEMPERATURE THERMISTOR
CONDENSER EVAPORATOR TEMPERATURE THERMISTOR
MOTOR CAP
INNER COVER
LEG
FAN MOTOR
MOTOR MOUNT
DRUM 2 ASSY
FUNCTIONAL PARTS
PLA-RP1.6AA.UK
PLA-RP2AA.UK
PLA-RP2.5AA.UK
15
1413
12
1
SPL WASHER
2
2
3
4
11
5
MOTOR CAP
10
6
9
CONDENSER
7
EVAPORATOR
TEMPERATURE
THERMISTOR
8
PIPE TEMPERATURE
THERMISTOR
78
Page 79
FUNCTIONAL PARTS
PLA-RP3AA.UK PLA-RP3AA1.UK
PLA-RP4AA.UK PLA-RP4AA1.UK
1
16
1514
13
SPL WASHER
2
2
3
4
12
5
MOTOR CAP
11
6
10
CONDENSER
7
FLARE NUT (Only R410A)
8
EVAPORATOR
TEMPERATURE
THERMISTOR
9
PIPE TEMPERATURE
THERMISTOR
No.
Parts No.
S70 003 687
1
S70 E01 130
2
S70 005 688
3
S70 007 688
S70 E00 130
4
S70 E00 114
5
S70 E01 114
S70 08K 097
6
S70 E40 480
7
S70 E41 480
S70 E50 097
8
S70 17J 202
9
S70 E20 202
10
S70 E50 129
11
S70 E00 659
12
S70 E02 659
S70 E02 130
13
S70 E06 762
14
S70 E07 762
S70 A41 105
15
S70 006 688
16
S70 008 688
Parts Name
BASE
LEG
DRUM 1 ASSY
DRUM 1 ASSY
LEG
TURBO FAN
TURBO FAN
SPL WASHER / NUT
HEAT EXCHANGER
HEAT EXCHANGER
FLARE NUT
PIPE TEMPERATURE THERMISTOR
CONDENSER EVAPORATOR TEMPERATURE THERMISTOR
MOTOR CAP
INNER COVER
INNER COVER
LEG
FAN MOTOR
FAN MOTOR
MOTOR MOUNT
DRUM 2 ASSY
DRUM 2 ASSY
Specifi-
cation
I.D. 5/8 O.D. 3/4
D17B6P70MS
D176P120MS
PLA-RP3AA.UK
PLA-RP3AA1.UK
Q'ty / set
1
2
1
1
1
1
1
1
1
1
1
1
1
4
1
PLA-RP4AA.UK
PLA-RP4AA1.UK
1
2
1
1
1
1
1
1
1
1
1
1
1
1
4
1
Remarks
(Drawing
No.)
Wiring
Diagram
Symbol
TH2
TH5
MF
MF
Recom-
mended
Q'ty
Price
Unit Amount
79
Page 80
No.
Parts No.
Parts Name
Wiring
Diagram
Symbol
Recom-
mended
Q'ty
Unit Amount
Price
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
BASE
LEG
DRUM 1 ASSY
LEG
TURBO FAN
SPL WASHER
HEAT EXCHANGER
FLARE NUT
PIPE TEMPERATURE THERMISTOR
CONDENSER EVAPORATOR TEMPERATURE THERMISTOR
MOTOR CAP
INNER COVER
LEG
FAN MOTOR
MOTOR MOUNT
DRUM 2 ASSY
FUNCTIONAL PARTS
PLA-RP3AA.UK PLA-RP3AA1.UK
PLA-RP4AA.UK PLA-RP4AA1.UK
1
2
3
DRAIN PLUG
17
DRAIN PLUG
16
15
4
5
6
7
8
9
Part numbers that is circled is not shown in
82
CAPACITOR
14
TERMINAL BLOCK
13
TERMINAL BLOCK
12
ROOM
11
TEMPERATURE
THERMISTOR
10
Page 83
FUNCTIONAL PARTS
PLA-RP5AA.UK PLA-RP5AA1.UK
PLA-RP6AA.UK PLA-RP6AA1.UK
1
2
3
DRAIN PLUG
17
DRAIN PLUG
16
15
4
5
6
7
8
9
Part numbers that is circled is not shown in the figure.
No.Parts No.Parts Name
S70 E01 529
1
S70 29H 523
2
S70 E02 355
3
S70 E00 266
4
S70 31K 241
5
S70 E20 501
6
S70 E20 313
7
S70 R03 310
8
S70 003 503
9
S70 E10 675
10
S70 E00 202
11
S70 512 716
12
S70 E01 716
13
S70 E02 255
14
S70 001 663
15
S70 A48 524
16
S70 A41 524
17
S70 A41 523
18
DRAIN PAN
DRAIN SOCKET
DRAIN PUMP
DRAIN SENSOR
DRAIN SENSOR HOLDER
ELECTLCAL CONTROL BOX
POWER BOARD
INDOOR CONTROLLER BOARD
CONTROL COVER ASSY
FAN GUARD
ROOM TEMPERATURE THERMISTOR
TERMINAL BLOCK
TERMINAL BLOCK
CAPACITOR
CORNER COVER
DRAIN PLUG
DRAIN PLUG
DRAIN HOSE ASSY
Specifi-
cation
2P (1, 2)
3P (S1,S2, S3)
7.0+ 440V
PLA-RP5AA.UK
PLA-RP5AA
Q'ty / set
1.UK
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
14
13
12
11
10
Remarks
PLA-RP6AA.UK
PLA-RP6AA1.UK
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
(Drawing
CAPACITOR
TERMINAL BLOCK
TERMINAL BLOCK
ROOM
TEMPERATURE
THERMISTOR
Wiring
Recom-
Diagram
mended
No.)
Symbol
DP
DS
P.B
I.B
TH1
TB5
TB4
C
Q'ty
Price
Unit Amount
83
Page 84
13
A SET/MONITOR DISPLA Y :
When SET is displayed, clock adjustment,
change of day , and daily and weekly timer
settings can be performed. When MONITOR is displayed, all s witches except SET/
MONITOR SW are invalidated. This is normal status.
BY WEEKLAY:
Used to select whether the operation pattern set using the P A TTERN canSETTING
be applied to different days of the week.
C CURRENT DAAY:Y DISPL
Indicates the current day.
D CURRENT TIME DISPLAY:
During MONITOR status, current time is
display.
During daily timer setting, a time desire
for timer setting is displayed.
E OPERAAY:TION MODE DISPL
Indicates the operation mode.
F DAILY AYTIMER SETTING DISPL:
24 hours is divided into 48 blocks and each
block is expressed in 30 minutes.
The block display consists of 3 patterns.
G SET BACK DISPLAY
Indicates the set back value.
1 SET/MONITOR Button
Using this switch, select “MONITOR” or “SET” Mode.
“MONITOR”: Indicates the current timer setting. All switches expect
MODE SELECTOR SW are inv
alidated
then. This is the
normal status.
“SET”:Set to “SET” mode for clock adjustment, change of day
and daily and weekly timer settings.
2 MODE A/B/OFF Button
Used for setting timer in day of week unit.
3 CLOCK ADJUSTMENT Button
Used for adjustment of the current time.
Push [
] SW to advance the time. Each time the button is pushed
the time advances by 1 minute, pushing continuously adv ances b y
1 minute at 0.5 second intervals, and when the lower digit of the
minute becomes “0” the time advances in 10 minute units.
[
] SW is used for reversing the time. Each time the button is
pushed the time reverses by 1 minute, pushing continuously reverses the time by 1 minute at 0.5 second intervals, and when the
lower digit of the minute becomes “0” the time reverses in 10 minute
units.
4 DAY SETTING Button
Used when setting the day.
5 WEEK DAY SETTING Button
Used for week day setting.
Pushing [
] SW moves the week day light display in order of S M
T W ... enabling to set the week da y.
6 SET BACK SETTING Button
Used for set back setting.
Set back can be done in the range of 1, 2, 4, 6 and 8
C (2, 4, 8, 12 and
16
F).
7 ON/OFF/SET BACK Button
Used to specify the time setting pattern.
8 DAILY TIMER Button
Used for timer setting in 30 minute units.
9 MODE A/B Button
Used to set A Mode or B Mode when specifying the operation time.
ABCDEFG
1234579
SMTWTFS
SET BACK
MODE A MODE B
0369
12
12 15 18 21 24
SET
M
O
NITOR
SET/MONITOR
ON/OFF/SET BACK
WEEKLY SETTING
PAC-YT32PTA
CLOCK
TODAY
DAILY SETTING
MODE A/B/OFF
DAYSET BACK
DAILY TIMER MODE A/B
6
8
TIMER SETTING DISPL
OPTIONAL PARTS
13-1. PROGRAM TIMER
Part No.PAC-YT32PTA
13-1-1. Names and functions
<PAC-YT32PTA>
84
Page 85
13-2. MULTI-FUNCTIONAL CASEMENT
Part No.
Applied Service Ref.
PLA-RP1.6,2,2.5,3,4,5,6AA.UK
PLA-RP3,4,5,6AA
PAC-SG03TM-E
1.UK
13-3. HIGH-EFFICIENCY FILTER ELEMENT (13-2. MULTI-FUNCTIONAL CASEMENT is needed.)
Part No.
Applied Service Ref.
PLA-RP1.6,2,2.5,3,4,5,6AA.UK
PLA-RP3,4,5,6AA
PAC-SG01KF
1.UK
13-4. GRILLE + WIRELESS REMOTE CONTROLLER
Part No.
Applied Service Ref.
PLA-RP1.6,2,2.5,3,4,5,6AA.UK
PLA-RP3,4,5,6AA1.UK
PLP-6AALM
13-5. GRILLE + WIRED REMOTE CONTROLLER
Part No.
Applied Service Ref.
PLA-RP1.6,2,2.5,3,4,5,6AA.UK
PLA-RP3,4,5,6AA1.UK
PLP-6AAM
13-6. REMOTE SENSOR
Part No.
Applied Service Ref.
PLA-RP1.6,2,2.5,3,4,5,6AA.UK
PLA-RP3,4,5,6AA
PAC-SE41TS-E
1.UK
13-7. REMOTE OPERATION ADAPTER
Part No.
Applied Service Ref.
PLA-RP1.6,2,2.5,3,4,5,6AA.UK
PLA-RP3,4,5,6AA
PAC-SF40RM-E
13-8. REMOTE ON/OFF ADAPTER
Part No.
Applied Service Ref.
PLA-RP1.6,2,2.5,3,4,5,6AA.UK
PLA-RP3,4,5,6AA
PAC-SE55RA-E
13-9. AIR OUTLET SHUTTER PLATE (20 SET, 2 PCS/SET)
Part No.
Applied Service Ref.
PLA-RP1.6,2,2.5,3,4,5,6AA.UK
PLA-RP3,4,5,6AA
PAC-SG06SP-E
1.UK
1.UK
1.UK
85
Page 86
HEAD OFFICE : MITSUBISHI DENKI BLDG., 2-2-3 MARUNOUCHI CHIYODA-KU , TOKYO 100-8310 , JAPAN
cCopyright 2003 MITSUBISHI ELECTRIC ENGINEERING CO., LTD.
Distributed in Jul. 2004 No. OC297 REVISED EDITION-C PDF 8
Distributed in Jun. 2004 No. OC297 REVISED EDITION-B PDF 8
Distributed in Dec. 2003 No. OC297 REVISED EDITION-A PDF 8
Distributed in Jun. 2003 No. OC297
Made in Japan
New publication, effective Jul. 2004.
Specifications subject to change without notice
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