Mitsubishi Electric CITY MULTI PLFY-P20VEM-E Operating manual

PARTS CATALOG (OCB657)
No. OCH657
December 2016
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
TECHNICAL & SERVICE MANUAL
CONTENTS
1. SAFETY PRECAUTION..........................2
2. PARTS NAMES AND FUNCTIONS........ 4
3. SPECIFICATIONS.................................11
4. 4-WAY AIR FLOW SYSTEM................. 16
5. OUTLINES AND DIMENSIONS............ 19
6. WIRING DIAGRAM...............................20
7. REFRIGERANT SYSTEM DIAGRAM...... 21
8. TROUBLESHOOTING.......................... 22
9. SPECIAL FUNCTION........................... 30
10. DISASSEMBLY PROCEDURE............. 33
Notes:
• This manual describes service
data of the indoor units only.
• RoHS compliant products have
<G> mark on the spec name
plate.
INDOOR UNIT
Model name
indication for
MAIN UNIT Model name
indication for GRILLE
Indoor unit
[Model names] [Service Ref.]
PLFY-P20VEM-E PLFY-P20VEM-E.UK
PLFY-P25VEM-E PLFY-P25VEM-E.UK
PLFY-P32VEM-E PLFY-P32VEM-E.UK
PLFY-P40VEM-E PLFY-P40VEM-E.UK
PLFY-P50VEM-E PLFY-P50VEM-E.UK
PLFY-P63VEM-E PLFY-P63VEM-E.UK
PLFY-P80VEM-E PLFY-P80VEM-E.UK
PLFY-P100VEM-E PLFY-P100VEM-E.UK
PLFY-P125VEM-E PLFY-P125VEM-E.UK
Grille model
[Model names] [Service Ref.]
PLP-6EA PLP-6EA PLP-6EAR1
PLP-6EAE PLP-6EAE PLP-6EAER1
PLP-6EAL PLP-6EAL PLP-6EALR1
PLP-6EALE PLP-6EALE PLP-6EALER1
PLP-6EAJ PLP-6EAJ
PLP-6EAJE PLP-6EAJE
PLP-6EALM PLP-6EALM
PLP-6EALME PLP-6EALME
WIRED REMOTE
CONTROLLER
(Option)
WIRELESS REMOTE
CONTROLLER
(Option)

32 3
Cautions for units utilizing refrigerant R410A
Store the piping indoors, and both ends of the
piping sealed until just before brazing.
(Leave elbow joints, etc. in their packaging.)
The refrigerant oil applied to flare and flange
connections must be ester oil, ether oil or
alkylbenzene oil in a small amount.
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 refrige-
rant 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.
Handle tools with care.
If dirt, dust or moisture enters into refrigerant cycle, that can
cause deterioration of refrigerant oil or malfunction of com-
pressor.
Do not use a charging cylinder.
If a charging cylinder is used, the composition of refrigera-
nt will change and the efficiency will be lowered.
Use the specified refrigerant only.
Never use any refrigerant other than that specified.
Doing so may cause a burst, an explosion, or fire when the
unit is being used, serviced, or disposed of.
Correct refrigerant is specified in the manuals and on the
spec labels provided with our products.
We will not be held responsible for mechanical failure,
system malfunction, unit breakdown or accidents caused
by failure to follow the instructions.
Flare tool
Electronic refrigerant
charging scale
Vacuum pump adaptor
Size adjustment gauge
Gauge manifold
Torque wrench
Gas leak detector
Charge hose
Tools for R410A
If dirt, dust or moisture enters into refrigerant cycle, that can
cause deterioration of refrigerant oil or malfunction of com-
pressor.
If large amount of mineral oil enters, that can cause deterio-
ration of refrigerant oil, etc.
Do not use the existing refrigerant piping.
The old refrigerant and lubricant in the existing piping
contain 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.
Ventilate the room if refrigerant leaks during
operation. If refrigerant comes into contact with
a flame, poisonous gases will be released.
1SAFETY PRECAUTION
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33
[1] Cautions for service
(1) Perform service after recovering 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
(1) Check that cylinder for R410A available on the market is syphon type.
(2) Charging should be performed with the cylinder of syphon stood vertically. (Refrigerant is charged from liquid phase.)
Electronic weighing scale
Unit
[3] Service tools
Use the below service tools as exclusive tools for R410A refrigerant.
No. Tool name Specifications
1 Gauge manifold ·Only for R410A
·Use the existing fitting specifications. (UNF1/2)
·Use high-tension side pressure of 5.3MPa·G or over.
2 Charge hose ·Only for R410A
·Use pressure performance of 5.09MPa·G or over.
3 Electronic scale
4 Gas leak detector ·Use the detector for R134a, R407C or R410A.
5 Adaptor for reverse flow check ·Attach on vacuum pump.
6 Refrigerant charge base
7 Refrigerant cylinder ·Only for R410A ·Top of cylinder (Pink)
·Cylinder with syphon
8 Refrigerant recovery equipment
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54 5
2PARTS NAMES AND FUNCTIONS
Drain pipe
Filter
Vane
Gas pipe
Liquid pipe
Air outlet
Air intake
(Intake grille)
i-see Sensor
(Option)
Signal receiver
(Option)
2-1. Indoor unit
OCH657

55
Function buttons
F1 F2 F3 F4
Press to turn ON/OFF the indoor unit.
ON/OFF button
When the backlight is off, pressing any button turns
the backlight on and does not perform its function.
(except for the (ON/OFF) button)
The functions of the function buttons change depending on
the screen. Refer to the button function guide that appears
at the bottom of the LCD for the functions they serve on a
given screen.
When the system is centrally controlled, the button function
guide that corresponds to the locked button will not appear.
Press to save the setting.
SELECT button
Press to return to the previous screen.
RETURN button
Press to bring up the Main menu.
MENU button
Operation settings will appear.
When the backlight is off, pressing any button turns the
backlight on and it will stay lit for a certain period of time
depending on the screen.
Backlit LCD
This lamp lights up in green while the unit is in operation.
It blinks while the remote controller is starting up or when
there is an error.
ON/OFF lamp
Main display : Press to change the operation mode.
Main menu : Press to move the cursor down.
Function button F1
Main display : Press to decrease temperature.
Main menu : Press to move the cursor up.
Function button F2
Main display : Press to increase temperature.
Main menu : Press to go to the previous page.
Function button F3
Main display : Press to change the fan speed.
Main menu : Press to go to the next page.
Function button F4
Fri
Room
Set temp.
Mode Temp. Fan
Cool Auto
Main
Main display:
Cursor Page
Main menu
Vane·Louver·Vent. (Lossnay)
High power
Timer
Weekly timer
OU silent mode
<Main display> <Main menu>
Function guide
2-2. WIRED REMOTE CONTROLLER <PAR-32MAA>
Wired remote controller function
OCH657