Mitsubishi Electric PUY-SP42VKA, PUY-SP48YKA, PUY-SP48VKA, PUY-SP36YKA, PUY-SP42YKA Service Manual
SERVICE MANUAL
SPLIT-TYPE, AIR CONDITIONERS
No. OCH642
INDOOR UNIT
CONTENTS
1. REFERENCE MANUAL
..................................
2
2. SAFETY PRECAUTION
..................................
3
3. PARTS NAMES AND FUNCTIONS
................
4
4. SPECIFICATIONS
...........................................
9
5. NOISE CRITERION CURVES ....................... 11
6. OUTLINES AND DIMENSIONS
.....................
12
7. WIRING DIAGRAM
.............................................
15
8. REFRIGERANT SYSTEM DIAGRAM
.............
16
9. TROUBLESHOOTING
...................................
17
10. DISASSEMBLY PROCEDURE
......................
32
October 2016
Note:
• This manual describes service data of the indoor units
only .
• RoHS compliant products
have <G> mark on the
spec name plate.
PARTS CATALOG (OCB642)
Model name
indication
WIRED REMOTE
CONTROLLER
WIRELESS REMOTE
CONTROLLER
ON/OFF TEMP
ON/OFF
TEMP.
Series PCY
Indoor unit
[Model Name]
PCY-SP18KA
PCY-SP24KA
PCY-SP30KA
PCY-SP36KA
PCY-SP42KA
PCY-SP48KA
[Service Ref.]
PCY-SP18KA.TH
PCY-SP24KA.TH
PCY-SP30KA.TH
PCY-SP36KA.TH
PCY-SP42KA.TH
PCY-SP48KA.TH
(Option) (Option)
2
1-1. OUTDOOR UNIT’S SERVICE MANUAL
1-2. TECHNICAL DATA BOOK
REFERENCE MANUAL
1
Service Ref Service Manual No.
SUY-SA18/24/30/36VA.TH
OCH648
OCB648
PUY-SP42/48VKA.TH(-D/-N)
PUY-SP36/42/48YKA.TH(-D/-N)
OCH644
OCB644
Series (Outdoor unit) Data Book No.
SUY-SA▪VA.TH OCS40
PUY-SP▪VKA.TH
PUY-SP▪YKA.TH
OCS41
OCH642
3
SAFETY PRECAUTION
2
Cautions for units utilising refrigerant R410A
2-2. 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 contaminants
such as sulfur, oxides, dirt, shaving particles, etc,
which are hazard to refrigerant cycle.
In addition, use pipes with specified thickness.
Store the piping indoors, and keep 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.
In case of using the existing pipes for R22, be careful with
the following.
· 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.
Handle tools with care.
If dirt, dust or moisture enters 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 enters into refrigerant cycle, that can
cause deterioration of refrigerant oil or malfunction of compressor.
If large amount of mineral oil enters, 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.
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.
2-1. ALWAYS OBSERVE FOR SAFETY
Before obtaining access to terminal, all supply
circuits must be disconnected.
OCH642
4
[3] Service tools
Use the below service tools as exclusive tools for R410A refrigerant.
Electronic weighing scale
Unit
3-1. INDOOR UNIT
PARTS NAMES AND FUNCTIONS
3
Air outlet
Louver
Vane
Air intake
Filter
(Inside of Air intake)
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
—
[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) If moisture or foreign matter might have entered the refrigerant piping during the servise, ensure to remove them.
[2] Additional refrigerant charge
When charging directly from cylinder
(1) Check that cylinder for R410A on the market is syphon type.
(2) Charging should be performed with the cylinder of syphon stood vertically. (Refrigerant is charged from liquid phase.)
OCH642
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