Mitsubishi Electric Mr.Slim PLA-P3AA Operating manual

TECHNICAL & SERVICE MANUAL
CONTENTS
1. TECHNICAL CHANGES······························2
2. COMBINATION OF INDOORAND OUTDOOR UNITS··3
3. SAFETY PRECAUTION·······························3
4. PART NAMES AND FUNCTIONS ···············5
5. SPECIFICATIONS ······································11
6. DATA ··························································23
7. OUTLINES AND DIMENSIONS·················52
8. WIRING DIAGRAM ····································53
9. REFRIGERANT SYSTEM DIAGRAM ··············54
10. TROUBLESHOOTING ·······························58
11. DISASSEMBLY PROCEDURE ··················60
12. PARTS LIST···············································63
13. OPTIONAL PARTS ····································68
Indoor unit
[Model names]
PLA-P3AA
PLA-P4AA
PLA-P5AA
PLA-P6AA
No.OC241
REVISED EDITION-B
Ceiling Cassettes
Series PLA
FILTER
CHECK MODE
TEST RUN
WIRED REMOTE
CONTROLLER
[Service Ref.]
PLA-P3AA.UK
PLA-P3AA1.UK
PLA-P4AA.UK
PLA-P4AA1.UK
PLA-P5AA.UK
PLA-P5AA1.UK
PLA-P6AA.UK
PLA-P6AA1.UK
R407C
ON/OFF
WIRELESS REMOTE
CONTROLLER
SPLIT-TYPE AIR CONDITIONERS
ON/OFF TEMP
MODEL SELECT
NOTAVAILABLE
CHECK TEST RUN
˚C
AMPM
AMPM
ON/OFF
CENTRALLY CONTROLLED
ERROR CODE
CLOCK
ON OFF
˚C
CHECK
CHECK MODE
FILTER
TEST RUN
FUNCTION
˚C
1Hr.
NOT AVAILABLE
STAND BY
DEFROST
TEMP.
PLA-P•AA.UK PLA-P•AA1.UK
PLA-P•AA.UK PLA-P•AA1.UK
Model name
indication
Revision:
• “12. PARTS LIST” has been
modified.
• Program timer <PAC-YT32PTA>
has been added in
“13. OPTIONAL PARTS”.
• Please void OC241 REVISED
EDITION-A.
Note:
• Refer to the OCT03 REVISED
EDITION-E as for control
relation. This manual does
not cover outdoor units. When
servicing them, please refer to
the service manual No.OC180
REVISED EDITION-A OC261
and this manual in a set.
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2
1TECHNICAL CHANGES
PLA-P3AA.UK ➔PLA-P3AA1PLA-P4AA.UK ➔PLA-P4AA1.UK
PLA-P5AA.UK ➔PLA-P5AA1PLA-P6AA.UK ➔PLA-P6AA1.UK
●REMOTE CONTROLLER has changed. (PAR-S27A-E ➔PAR-20MAA-E, PAR-SL95A-E ➔PAR-SL97A-E)
●Outdoor unit which are connected to PLA-P•AA.UK and PLA-P•AA1.UK have been added.
Revision:
1. “ 12. PARTS LIST ” has been modified on page 65, 66 and 67.
Service Ref.
Page IncorrectRevise point Correct
65
66
67
FUNCTIONAL PARTS
No.7 HEAT
EXCHANGE
FUNCTIONAL PARTS
No.12 TERMINAL
BLOCK
FUNCTIONAL PARTS
No.12 TERMINAL
BLOCK
S70 E24 480S70 E21 480
S70 E25 480S70 E22 480
S70 E01 716S70 517 716
PLA-P5AA.UK
PLA-P5AA1.UK
PLA-P3AA.UK
PLA-P3AA1.UK
PLA-P4AA.UK
PLA-P4AA1.UK
PLA-P3AA.UK
PLA-P3AA1.UK
PLA-P4AA.UK
PLA-P4AA1.UK
PLA-P5AA.UK
PLA-P5AA1.UK
PLA-P6AA.UK
PLA-P6AA1.UK
PLA-P5AA.UK
PLA-P5AA1.UK
PLA-P6AA.UK
PLA-P6AA1.UK
PLA-P6AA.UK
PLA-P6AA1.UK
Service Ref.
Page Old
parts code
Revise point New
part code
66
67
FUNCTIONAL PARTS
No.7 INDOOR
CONTROLLER
BOARD
FUNCTIONAL PARTS
No.7 INDOOR
CONTROLLER
BOARD
S70 E20 310*
S70 E24 310
S70 E25 310
S70 E26 310
S70 E27 310
PLA-P3AA.UK
PLA-P3AA1.UK
PLA-P4AA.UK
PLA-P4AA1.UK
PLA-P5AA.UK
PLA-P5AA1.UK
PLA-P6AA.UK
PLA-P6AA1.UK
Service Ref.
Page Old
part code
Revise point New
part code
66
67
FUNCTIONAL PARTS
No.3 DRAIN PUMP
FUNCTIONAL PARTS
No.3 DRAIN PUMP
S70 E02 355S70 E01 355
Spare INDOOR CONTROLLER BOARD for PLA-P3AA.UK, PLA-P3AA1.UK, PLA-P4AA.UK,
PLA-P4AA1.UK, PLA-P5AA.UK, PLA-P5AA1.UK, PLA-P6AA.UK and PLA-P6AA1.UK are unified.
DRAIN PUMP has been changed.
2. The description “The part name of symbol “I.B” is “SPCB” ” is added on both pages of wiring diagram and part list.
OC241-B-1.qxp 04.9.29 5:16 PM Page 2

3
COMBINATION OF INDOOR AND OUTDOOR UNITS
2
SAFETY PRECAUTION
3
Cautions for devices that use R407C refrigerant.
· Do not use the existing refrigerant piping.
-The old refrigerant and lubricating oil in the existing piping contains a large amount of chlorine which may cause the lubricating
oil of the new unit to deteriorate.
· 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 lubricating oil will
result.
· Store the piping to be used during installation indoors and keep both ends of the piping 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.
· Use Suniso 4GS or 3GS (small amount) as the lubricating oil to coat flares and flange connection parts.
-The lubricating oil used with the air conditioner is highly hygroscopic. If it is used, water may be mixed in and deterioration
of the lubricating oil may result.
· Use liquid refrigerant to charge the system.
-If gas refrigerant is used to charge the system, the composition of the refrigerant in the cylinder will change and perfor-
mance 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 lubricating oil to deteriorate.
· Use a vacuum pump with a reverse flow check valve.
-The vacuum pump oil may flow back into the refrigerant cycle and cause the lubricating oil to deteriorate.
Heat pump type Outdoor unit
PUH-P Cooling only type PU-P
Heat pump without
electric heater
or
Cooling only
6
YGA
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VGA
—
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Indoor unit
PLA-P3AA.UK
PLA-P4AA.UK
PLA-P5AA.UK
PLA-P6AA.UK
3
3
Heat pump type Outdoor unit
PUH-P Cooling only type PU-P
Heat pump without
electric heater
or
Cooling only
6
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Indoor unit
PLA-P3AA.UK
PLA-P3AA1.UK
PLA-P4AA.UK
PLA-P4AA1.UK
PLA-P5AA.UK
PLA-P5AA1.UK
PLA-P6AA.UK
PLA-P6AA1.UK
3434
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4
[1] Service tools
Use the below service tools as exclusive tools for R407C refrigerant.
No. Tool name Specifications
1Gauge manifold ·Only for R407C.
·Use the existing fitting SPECIFICATIONS. (UNF7/16)
·Use high-tension side pressure of 35kgf/cm2or over.
2Charge hose ·Only for R407C.
·Use pressure performance of 52kgf/cm2or 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.
[2] Notice on repair service
·After recovering all the refrigerant in the unit, work may be started.
·Do not release the refrigerant in the air.
·After completing the repair service, recharge the system with the specified amount of the
liquid refrigerant.
[3] Refrigerant recharging
(1) Refrigerant recharging process
Direct charging from the cylinder.
·Confirm that the cylinder is suitable for syphoning.
·Raise the cylinder and recharge the unit by syphoning liquid refrigerant.
(2) Recharge when refrigerant leakage has occurred.
·After recovering all the refrigerant in the unit, work may be started.
·Do not release the refrigerant in the air.
·After completing the repair service, recharge the system with the specified amount of
the liquid refrigerant.
Gravimeter
Unit
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5
PART NAMES AND FUNCTIONS
4
On the controls are set, the same operation mode can be repeated by simply pressing the ON/OFF button.
PAR-S27AA
● Operation buttons
CHECK-TEST RUN button
Only press this button to per-
form an inspection check or test
operation, Do not use it for nor-
mal operation.
(Not available for this model.)
button
This switches the horizontal fan
motion ON and OFF.
FILTER button
This resets the filter cleaning indica-
tion display.
ON/OFF button
This switches between the operation
and stop modes each time it is
pressed. The lamp on this button
lights during operation.
button
This adjusts the vertical angle of the
ventilation.
button
This sets the ventilation fan
speed.
button
This sets the current time. start
time and stop time.
button
This switches between continuous
operation and the timer operation.
TEMP. button
This sets the room temperature, The
temperature setting can be performed
in 1°C units
Setting range
Cooling 19°C to 30°C
Heating 17°C to 28°C
button
Press this button to switch the cooling,
electronic dry (dehumidify), automatic
and heating modes.
This model name of the remote con-
troller is indicated.
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.
● Indoor Unit
PLA-P3AA.UK, PLA-P4AA.UK, PLA-P5AA.UK, PLA-P6AA.UK
PLA-P3AA1.UK, PLA-P4AA1.UK, PLA-P5AA1.UK, PLA-P6AA1.UK
button
This sets the ventilation fan speed.
● Wired remote controller
PLA-P3AA.UK, PLA-P4AA.UK, PLA-P5AA.UK, PLA-P6AA.UK
OC241-B-1.qxp 04.9.29 5:16 PM Page 5