Mitsubishi Electric PKFY Series Operating manual

TECHNICAL & SERVICE MANUAL
CONTENTS
1. TECHNICAL CHANGES···························2
2. SAFETY PRECAUTION····························3
3. PART NAMES AND FUNCTIONS············5
4. SPECIFICATIONS·····································7
5. OUTLINES AND DIMENSIONS················9
6. WIRING DIAGRAM·································11
7. REFRIGERANT SYSTEM DIAGRAM ····13
8. TROUBLE SHOOTING···························14
9. DISASSEMBLY PROCEDURE···············19
10. PARTS LIST············································22
11. OPTIONAL PARTS ················Back Cover
<Indoor unit>
[Model names] [Service Ref.]
PKFY-P63VFM-A PKFY-P63VFM-A
PKFY-P63VFM-A1
PKFY-P63VFM-A2
PKFY-P100VFM-A PKFY-P100VFM-A
PKFY-P100VFM-A1
PKFY-P100VFM-A2
2003
Wall Mounted
Series PKFY
R407C /R22
SPLIT-TYPE, HEAT PMUP AIR CONDITIONERS
No. OC251
REVISED EDITION-A
Indoor unit
• PKFY-P63VFM-A1, PKFY-P100VFM-A1,
PKFY-P63VFM-A2and PKFY-P100VFM-A2
are added in REVISED EDITION-A.
• Please void OC251,OC270.
OC251-A.qxp 03.3.25 9:51 AM Page 1
All manuals and user guides at all-guides.com
all-guides.com

2
1 TECHNICAL CHANGES
·PKFY-P63VFM-A ➔PKFY-P63VFM-A1
·PKFY-P100VFM-A ➔PKFY-P100VFM-A1
(CHANGE POINTS)
Change of the service parts.
Refer to 10.PARTS LIST for details.
1. DRAIN PAN shape has changed.
2. NOSE shape has changed.
3. BOX ASSEMBLY shape has changed.
·PKFY-P63VFM-A1➔PKFY-P63VFM-A2
·PKFY-P100VFM-A1➔PKFY-P100VFM-A2
(CHANGE POINTS)
1. DEW PREVENTION HEATER has been added.
Refer to 6.WIRING DIAGRAM for details.
2. BOX ASSEMBLY has changed due to the addition of DEW PREVENTION HEATER.
Refer to 10.PARTS LIST for details.
3. The contents of SPECIFICATIONS have changed.
Due to the addition of DEW PREVENTION HEATER, the values of Input and Current on Electric
characteristic have changed.
Refer to 4.SPECIFICATIONS for details.
4. Optional DRAIN-UP MACHINE (PAC-SE89DMA-E) cannot be installed in the unit.
OC251-A.qxp 03.3.25 9:51 AM Page 2
All manuals and user guides at all-guides.com

3
SAFETY PRECAUTION
2
Cautions for using with the outdoor unit which adopts R407C refrigerant.
· Do not use the existing refrigerant piping.
-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.
· 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.
· Use ESTR , ETHER or HAB as the lubricant to coat flares and flange connection parts.
Use liquid refrigerant to seal 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.
OC251-A.qxp 03.3.25 9:51 AM Page 3
All manuals and user guides at all-guides.com

4
[3] 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.
Gravimeter
Unit
[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 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.
[2] Notice on repair 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.
OC251-A.qxp 03.3.25 9:51 AM Page 4
All manuals and user guides at all-guides.com

5
PART NAMES AND FUNCTIONS
3
● Indoor Unit
PKFY-P63VFM-A PKFY-P63VFM-A1PKFY-P63VFM-A2
PKFY-P100VFM-A PKFY-P100VFM-A1PKFY-P100VFM-A2
Air intake
Room air is suctioned
in here. (Removes dust and dirt from the intake air.)
Filter Air intake grille
Air outletAir outlet
Auto vane
Air flow can be changed to horizontally
by moving the Guide vane to the left or
right.
Guide vane
● Remote controller [PAR-20MAA]
● Once the controls are set, the same operation mode can be repeated by simply pressing the on / off button.
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
Press this button to switch the cooler,
electronic dry (dehumidify), automatic
and heater modes.
OPERATION SWITCH button
This sets the room temperature. The
temperature setting can be performed
in 1:units
Setting range
Cooler 19:to 30:
Heater 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
This 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.
AIR SPEED button
● Operation buttons
OC251-A.qxp 03.3.25 9:51 AM Page 5
All manuals and user guides at all-guides.com