Mitsubishi Electric PLFY-P15VCM-E2 Operating manual

TECHNICAL & SERVICE MANUAL
Indoor unit
[Model names] [Service Ref.]
PLFY-P15VCM-E2.TH
PLFY-P15VCM-E2R1.TH
PLFY-P20VCM-E2.TH
PLFY-P20VCM-E2R1.TH
PLFY-P20VCM-E2R2.TH
PLFY-P25VCM-E2.TH
PLFY-P25VCM-E2R1.TH
PLFY-P25VCM-E2R2.TH
PLFY-P32VCM-E2.TH
PLFY-P32VCM-E2R1.TH
PLFY-P32VCM-E2R2.TH
PLFY-P40VCM-E2.TH
PLFY-P40VCM-E2R1.TH
PLFY-P40VCM-E2R2.TH
INDOOR UNIT
CONTENTS
1. TECHNICAL CHANGES.........................2
2. SAFETY PRECAUTION..........................2
3. PART NAMES AND FUNCTIONS..........6
4. SPECIFICATIONS.................................14
5. 4-WAY AIR FLOW SYSTEM.................16
6. OUTLINES AND DIMENSIONS............18
7. WIRING DIAGRAM...............................19
8. REFRIGERANT SYSTEM DIAGRAM...... 21
9. TROUBLESHOOTING..........................22
10. DISASSEMBLY PROCEDURE.............29
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
Model name
indication
No.OCH463
REVISED EDITION-C
PLFY-P15VCM-E2
PLFY-P20VCM-E2
PLFY-P25VCM-E2
PLFY-P32VCM-E2
PLFY-P40VCM-E2
December 2012
Note:
• This manual describes only service
data of the indoor units.
• RoHS compliant products have
<G> mark on spec name plate.
PARTS CATALOG (OCB463)
Revision:
• PLFY-P15VCM-E2R1.TH and
PLFY-P20/25/32/40VCM-E2R2.TH
have been added in REVISED
EDITION-C.
• Some descriptions have been
modified.
• Please void OCH463
REVISED EDITION-B.
R407C R22R410A

2
1TECHNICAL CHANGES
PLFY-P15VCM-E2.TH PLFY-P15VCM-E2R1.TH
PLFY-P20VCM-E2R1.TH PLFY-P20VCM-E2R2.TH
PLFY-P25VCM-E2R1.TH PLFY-P25VCM-E2R2.TH
PLFY-P32VCM-E2R1.TH PLFY-P32VCM-E2R2.TH
PLFY-P40VCM-E2R1.TH PLFY-P40VCM-E2R2.TH
• INDOOR CONTROLLER BOARD has been changed. (S/W version up)
PLFY-P20VCM-E2.TH PLFY-P20VCM-E2R1.TH
PLFY-P25VCM-E2.TH PLFY-P25VCM-E2R1.TH
PLFY-P32VCM-E2.TH PLFY-P32VCM-E2R1.TH
PLFY-P40VCM-E2.TH PLFY-P40VCM-E2R1.TH
• TURBO FAN has been changed.
Cautions for units utilizing refrigerant R407C
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.
Use ESTR , ETHER or HAB as the lubricant to
coat flares and flange connection parts.
If large amount of mineral oil enters, 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.
If dust, dirt, or water enters the refrigerant cycle,
deterioration of the oil and compressor trouble may result.
Store the piping indoors, and both ends of the
piping sealed until just before brazing.
(Leave elbow joints, etc. in their packaging.)
Ventilate the room if refrigerant leaks during
operation. If refrigerant comes into contact with
a flame, poisonous gases will be released.
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.
Use the specified refrigerant only.
2SAFETY PRECAUTION
SAFETY PRECAUTION
CAUTIONS RELATED TO NEW REFRIGERANT
OCH463C

33
[3] Service tools
Use the below service tools as exclusive tools for R407C refrigerant.
[2] Refrigerant recharging
(1) Refrigerant recharging process
1Direct charging from the cylinder.
· R407C cylinder 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] 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.
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.
5Adaptor 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 —
OCH463C

4
Cautions for units utilizing refrigerant R410A
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.
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
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 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.
Ventilate the room if refrigerant leaks during
operation. If refrigerant comes into contact with
a flame, poisonous gases will be released.
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.
Use the specified refrigerant only.
OCH463C

5
[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
· Check that cylinder for R410A on the market is syphon type.
· Charging should be performed with the cylinder of syphon standing vertically. (Refrigerant is charged from liquid phase.)
Gravimeter
Unit
[3] Service tools
Use the below service tools as exclusive tools for R410A refrigerant.
No. Tool name Specifications
1Gauge manifold · Only for R410A
· Use the existing fitting specifications. (UNF1/2)
· 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 R410A · Top of cylinder (Pink)
· Cylinder with syphon
8Refrigerant recovery equipment
OCH463C