Mitsubishi Electric PURY-P72 How to use

--~~--~
Tab 1
IN THIS SECTION
.Air Conditioners
I-IARRIS ~IR
SY-STE~S, INC.
Heat;inB &..-Air Condit;ioninB
Inst;allat;ion &,,-Service

Changes for the Better
•
41
4&

Safety Precautions
-Before installing the unit, thoroughly read the following safety precautions.
-Observe these safety precautions for your safety.
LtWARNING
This symbol is intended to alert the userto the presence of important instructions that must be followed to avoid
the risk
of serious injury or death.
L!l CAUTION
This symbol is intended to alert the userto the presence of important instructions that must be followed to avoid
the risk of serious injury or damage to the unit.
-After reading this manual, give it to the userto retain for future reference.
-Keepthis manual for easy reference. When the unit is moved or repaired, give this manual to those who provide these
services.
When the user changes, make sure that the new user receives this manual.
I.&. WARNING
Ask your dealer or aqualified technician to install the
unit.
Improperinstallation
by the user may result in water leak-
age, electric shock, smoke, and/or fire.
Properly install the unit on a surface that can with-
stand the weight of the unit.
Unit installed on
an unstable surface mayfall and cause in-
jury.
Only use specified cables. Securely connect each ca·
ble so that the tenninals do not carry the weight of the
cable.
Improperly connected or fixed cables may produce heat
and start afire.
Take
appropriate safety measures against strong
winds and earthquakes to prevent the unit from falling.
Ifthe unit is not installed properly, the unit may
fall and
cause serious injury to the person or damage to the unit.
Do not make any modifications or alterations to the
unit. Consult your dealer for repair.
Improperrepairmay result
in waterleakage, electric shock,
smoke, and/or fire.
Do not touch the heat exchanger fins.
The fins are sharp and dangerous.
In
the event of arefrigerant leak, thoroughly ventilate
the room.
Ifrefrigerant
gas leaks and comes in contact with an open
flame, poisonous gases will be produced.
When installing the All-Fresh
type units, take it into
consideration that the outside air may be discharged
directly into the room when the thenno is turned off.
Direct exposure to outdoor air may have an adverse effect
on health. It may also result
in food spoilage.
Properly install the unit according to the instructions
in the installation manual.
Improper installation may result
in water leakage, electric
shock, smoke, and/or fire.
Have
all electrical work perfonned by an authorized
electrician according to the local regulations and in-
structions in this manual, and adedicated circuit must
be used.
Insufficient capacity ofthe powersupply circuit
or improper
installation may result
in malfunctions of the unit, electric
shock, smoke, and/or fire.
HWE0803A GB

IAWARNING
Securely attach the terminal block cover (panel) to the
unit.
Ifthe terminal block cover (panel) is not installed properly,
dust andlor water may infiltrate and pose arisk ofelectric
shock, smoke, andlor fire.
Only usethe type of refrigerant that is indicated on the
unit when installing or reinstalling the unit.
Infiltration ofany other type ofrefrigerant orair into the unit
may adversely affect the refrigerant cycle and may cause
the pipes to burst or explode.
When
installing the unit in asmall room, exercise cau-
tion and take measures against leaked refrigerant
reaching the limiting concentration.
Consult your dealer with any questions regarding limiting
concentrations and for precautionary measures before in-
stalling the unit. Leaked refrigerant gas exceeding the lim-
iting concentration causes oxygen deficiency.
Consult your dealer or a specialist when moving or re-
installing the unit.
Improper installation may result
in water leakage, electric
shock, andlor fire.
HWE0803A
ii
After completing the service work, check for a gas
leak.
Ifleaked refrigerant
is exposed to aheat source, such as a
fan heater, stove, or electric grill, poisonous gases may
be
produced.
Do
not try to defeat the safety features of the unit.
Forced operation
of the pressure switch or the temperature
switch by defeating the safety features
of these devices, or
the use
of accessories other than the ones that are recom-
mended by MITSUBISHI may result
in smoke, fire, and/or
explosion.
Only use accessories recommended by MITSUBISHI.
Ask aqualified technician to install the unit. Improper instal-
lation by the user may result in water leakage, electric
shock, smoke, and/or fire.
Control box houses high-voltage parts.
When opening orclosing the front panel
of the control box,
do not let it come into contact with any
of the internal com-
ponents. Before inspecting the inside
of the control box,
tum offthe power, keep the unit
off for at least 10 minutes,
and confirm that the voltage between FT-P and FT-N on
INV Board has dropped to DC20V
or less. (It takes about
10minutes to discharge electricityafterthe powersupply is
turned off.)
GB
.. - -----

Precautions for handling units for use with R410A
I Lt:,. CAUTION
Do not use the existing refrigerant piping.
-A large amount of chlorine thatis contained in the residual
refrigerant and refrigerator oil
in the existing piping may
cause the refrigerator oil
in the new unit to deteriorate.
tR410A is ahigh-pressure refrigerant and
can cause the
existing pipes to burst.
Use
refrigerant pipes made of phosphorus deoxidized
copper. Keep the inner and outer surfaces of the pipes
clean
and free of such contaminants as sulfur, oxides,
dust, dirt, shaving particles, oil, and water.
These types
of contaminants inside the refrigerant pipes
may cause the refrigerant oil to deteriorate.
Store the pipes to be installed indoors, and keep both
ends of the pipes sealed until immediately before braz-
ing. (Keep
elbows and other joints wrapped in plastic.)
Infiltration of dust, dirt, orwater into the refrigerant system
may cause the refrigerating machine oil to deteriorate or
cause the unit to malfunction.
Use a
small amount of ester oil, ether all, or alkylben-
zene
to coat flares and flanges.
Infiltration
of alarge amount of mineral oil may cause the re-
frigerating machine oil
to deteriorate.
Charge liquid refrigerant (as opposed to gaseous re-
frigerant) into the system.
Ifgaseous refrigerant
is charged into the system, the com-
position of the refrigerant
in the cylinder will change and
may result
in performance loss.
HWE0803A iii
Use avacuum pump with a reverse-flow check valve.
Ifavacuum pump that is not equipped with areverse-flow
check valve
is used, the vacuum pump oil mayflow into the
refrigerant cycle and cause the refrigerating machine oil to
deteriorate.
Prepare
tools for exclusive use with R410A. Do not use
the following tools If they have been used with the con-
ventional refrigerant (gauge manifold, charging hose,
gas leakdetector,reverse-flow check valve,refrigerant
charge base,
vacuum gauge, and refrigerant recovery
equipment.).
-If the refrigerant or the refrigerating machine oil left on
these tools are mixed in with R410A, it may cause the re-
frigerating machine oil
to deteriorate.
-Infiltration ofwater may cause the refrigerating machine
oil to deteriorate.
-Gas leak detectors for conventional refrigerants will not
detect an R410A leak because R410A is free ofchlorine.
Do not use acharging cylinder.
If acharging cylinder
is used, the composition of the refrig-
erant will change, and the unit may experience power loss.
Exercise special care when handling the tools for use
with R410A.
Infiltration of dust, dirt, or water into the refrigerant system
may cause the refrigerating machine oil to deteriorate.
Only use refrigerant R410A.
The use
of other types ofrefrigerant that contain chlorine
(Le. R22) may cause the refrigerating machine oil to deteri-
orate.
GB

_ .. _---------------
Before installing the unit
I Lt. WARNING
Do not install the unit where agas leak may occur.
Ifgaseous refrigerant leaks and piles up around the unit, it
may
be ignited.
Do
not use the unit to keep food items, animals, plants,
artifacts,
or for other special purposes.
The unit is not designed to preserve food products.
Do
not use the unit in an unusual environment.
• Do notinstall the unit where alarge amount ofoil orsteam
is present orwhere acidic or alkaline solutions or chemical
sprays are used frequently. Doing so may lead
to are-
markable drop in performance, electric shock, malfunc-
tions, smoke, and/or fire.
•The presence
of organic solvents or corrosive gas (Le.
ammonia, sulfur compounds, and acid) may cause gas
leakage or water leakage.
HWE0803A
iv
When installing the unit in a hospital, take appropriate
measures to reduce noise interference.
High-frequency medical equipment may interfere with the
normal operation
of the air conditioner or vice versa.
Do not install the unit on or over things that cannot get
wet.
When the humidity level exceeds 80% or if the drainage
system
is clogged, the indoor unit may drip water. Drain wa-
teris also discharged from the outdoor unit. Install acentral-
ized drainage system
if necessary.
GB

Before installing the unit (moving and reinstalling the unit) and performing
electrical work
[Lt.CAUTION
Properly ground the unit.
Do notconnectthe grounding wire to agaspipe, waterpipe,
lightning rod, or grounding wire from atelephone pole. Im-
proper grounding may result in electric shock, smoke, fire,
and/or malfunction due to noise interference.
Do not put tension on the power supply wires.
If tension is put on the wires, they may break and result in
excessive heat, smoke, and/or fire.
Install an earth leakage breaker to avoid the risk of
electric shock.
Failure to install an earth leakage breaker may result in
electric shock, smoke, and/orfire.
Use the kind of power supply wires that are specified
in the installation manual.
The use of wrong kind of power supply wires may result in
current leak, electric shock, and/or fire.
Use breakers and fuses (current breaker, remote
switch <switch +Type-B fuse>, moulded case circuit
breaker) with the proper current capacity.
The use of wrong capacity fuses, steel wires, or copper
wires may result in malfunctions, smoke, and/orfire.
Do not spray water on the air conditioner or Immerse
the air conditioner in water.
Otherwise, electric shock and/or fire may result.
When handling units, always wear protective gloves to
protect your hands from metal parts and high.tempera-
ture parts.
HWE0803A v
Periodically check the installation base for damage.
Ifthe unit is left on adamaged platform, it may fall and
cause injury.
Properly install the drain pipes according to the in-
structions in the installation manual. Keep them insu-
lated to avoid dew condensation.
Improper plumbing work may result in water leakage and
damage to the furnishings.
Exercise caution when transporting products.
-Products weighing more than 20 kg should not be carried
alone.
- Do notcarrythe productbythe PP bandsthat are used on
some products.
•Do nottouch the heat exchangerfins. They are sharp and
dangerous.
-When lifting the unit with acrane, secure all four comers
to prevent the unit from falling.
Properly dispose of the packing materials.
·Nails and wood pieces in the package may pose arisk of
injury.
·Plastic bags may pose arisk of choking hazard to chil-
dren. Tear plastic bags into pieces before disposing of
them.
GB

1-
Before the test run
!6CAUTION
Turn on the unit at least 12 hours before the test run.
Keep the unitturned
on throughout the season. Ifthe unit is
turned off in the middle of aseason, it may result in malfunc-
tions.
To
avoid the risk of electric shock or malfunction of the /
unit,
do not operate switches with wet hands.
Do
not touch the refrigerantpipes with bare hands dur-
ing and immediately after operation.
During orimmediately after operation, certain parts
of the
unit such as pipes and compressor may be either very cold
or hot, depending
on the state ofthe refrigerant in the unit
at the time. To reduce the risk offrost bites and bums, do
not touch these parts with bare hands.
Do
not operate the unit without panels and safety
guards.
Rotating, high-temperature,
or high-voltage parts on the unit
pose arisk of burns and/or electric shock.
Do
not turn off the power immediately after stopping
the operation.
Keep the unit
on for at leastfive minutes before turning off
the power
to prevent water leakage or malfunction.
Do not operate the unit without the air filter.
Dust particles
may build up in the system and cause mal-
functions.
HWEOB03A
vi
GB

CONTENTS
IRead Before Servicing
[1] Read Before Servicing 3
[2] Necessary Tools and Materials 4
[3] Piping Materials 5
[4] Storage of Piping 7
[5] Pipe Processing 7
[6] Brazing 8
[7] Air Tightness Test 9
[8] Vacuum Drying (Evacuation) 10
[9] Refrigerant Charging 12
[10] Remedies to be taken
in case of aRefrigerant Leak 12
[11] Characteristics
of the Conventional and the New Refrigerants 13
[12] Notes on Refrigerating Machine Oil 14
IT Restrictions
[1] System configuration 17
[2] Types and Maximum allowable Length
of Cables 18
[3] Switch Settings and Address Settings 19
[4] Sample System Connection 25
[5] An Example
of aSystem to which an MA Remote Controller is connected 26
[6] An Example of aSystem to which an M-NET Remote Controller is connected 38
[7] An Example of aSystem to which both MA Remote Controller and M-NET Remote
Controller are connected 40
[8] Restrictions on Pipe Length 43
ill Outdoor Unit Components
[1] Outdoor Unit Components and Refrigerant Circuit.. 57
[2] Control Box ofthe Outdoor Unit... 60
[3] Outdoor Unit Circuit Board 64
[4] BC Controller Components 74
[5] Control Box of the BC Controller 77
[6] BC Controller Circuit Board 78
IV Remote Controller
[1] Functions and Specifications of MA and ME Remote Controllers 83
[2] Group Settings and Interlock Settings via the ME Remote Controller 84
[3] Interlock Settings via the
MA Remote Controller 88
[4] Using the built-in Temperature Sensor on the Remote Controller 89
VElectrical Wiring Diagram
[1] Electrical Wiring Diagram of the Outdoor Unit 93
[2] Electrical Wiring Diagram
of the BC Controller 96
[3] Electrical Wiring Diagram
of Transmission Booster 105
VI Refrigerant Circuit
[1] Refrigerant Circuit Diagram 109
[2] Principal Parts and Functions 116
VII Control
[1] Functions and Factory Settings of the Dipswitches 125
[2] Controlling the Outdoor Unit 132
[3] Controlling BC Controller 145
[4] Operation Flow Chart 146
VITI Test Run Mode
[1] Items to be checked before aTest Run 155
[2] Test Run Method 156
[3] Operating Characteristic and Refrigerant Amount.. 157
[4] Adjusting the Refrigerant Amount... 157
[5] Refrigerant Amount Adjust Mode 160
[6] The following symptoms are normal. 162
[7] Standard Operation Data (Reference Data) 163
HWEOB03A GB •

CONTENTS
IX Troubleshooting
[1] Error Code Lists 179
[2] Responding to Error Display on the Remote Controller 182
[3] Investigation
of Transmission Wave Shape/Noise 270
[4] Troubleshooting Principal Parts 273
[5] Refrigerant Leak 314
[6J Compressor Replacement Jnstructions 316
[7] Servicing the BC controller 327
[8J Troubleshooting Using the Outdoor Unit LED Error Display 330
XLED Monitor Display on the Outdoor Unit Board
[1J How to Read the LED on the Service Monitor 333
HWE0803A GB