Mitsubishi Electric City Multi PURY-M200YNW-A1 How to use

i
Safety Precautions
Read and observe the safety precautions below and the instructions provided on the labels affixed to the unit.
Retain this manual for future reference. Make sure that this manual is passed on to the end users.
All refrigerant piping work, electrical work, air-tightness test, and brazing work must be performed by qualified personnel.
Incorrect use may result in serious injury.
[1] General Precautions
indicates a hazardous situation which, if not avoided, could result in
death or serious injury.
indicates a hazardous situation which, if not avoided, could result in
minor or moderate injury.
addresses practices not related to personal injury, such as product
and/or property damage.
General Precautions
Do not use any refrigerant other than the
type indicated in the manuals for the unit
and on the nameplate.
Doing so will cause the unit or pipes to burst, or result
in an explosion or fire during use, during repairs, or at
the time of disposal of the unit.
It may also be in violation of applicable laws.
MITSUBISHI ELECTRIC CORPORATION cannot be
held responsible for malfunctions or accidents result-
ing from the use of the wrong type of refrigerant.
Do not use the unit in an unusual environ-
ment.
If the unit is used in areas exposed to large amounts of
oil, steam, organic solvents, or corrosive gases (such
as ammonia, sulfuric compounds, or acids), or areas
where acidic/alkaline solutions or special chemical
sprays are used frequently, it may significantly reduce
the performance and corrode the internal parts, result-
ing in refrigerant leakage, water leakage, injury, elec-
tric shock, malfunction, smoke, or fire.
Do not change the settings of the safety or
protection devices.
Forcing the unit to operate by disabling the safety de-
vices, such as the pressure switch or the thermal
switch, may result in bursting, fire, or explosion.
Operating the unit with a safety device whose settings
have been changed may result in bursting, fire, or ex-
plosion.
Using safety devices other than those specified by Mit-
subishi Electric may result in bursting, fire, or explo-
sion.
Do not alter or modify the unit.
Doing so will result in refrigerant leakage, water leak-
age, serious injury, electric shock, or fire.
Do not wet the electrical parts.
Doing so may result in current leakage, electric shock,
malfunction, or fire.
Do not touch the electrical parts, switches,
or buttons with wet fingers.
Doing so may result in electric shock, malfunction, or
fire.
Do not touch the refrigerant pipes and re-
frigerant line components with bare hands
during and immediately after operation.
The refrigerant in the pipes will be very hot or very cold,
resulting in frostbite or burns.
Do not touch the electrical parts with bare
hands during and immediately after opera-
tion.
Doing so may result in burns.
Ventilate the room while servicing the unit.
If the refrigerant leaks, oxygen deficiency may result. If
the leaked refrigerant comes in contact with a heat
source, toxic gas will be generated.
If you notice any abnormality (e.g., a burn-
ing smell), stop the operation, turn off the
power switch, and consult your dealer.
Continuing the operation may result in electric shock,
malfunction, or fire.
Properly install all required covers and pan-
els on the terminal box and the control box.
If dust or water enters the unit, this may result in electric
shock or fire.
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ii
[2] Transportation a nd Installation
Periodically check the unit base for dam-
age.
If the damage is left uncorrected, the unit will fall and
cause serious injury.
Consult your dealer for the proper disposal
of the unit.
The refrigerant oil and the refrigerant in the unit will
pose a risk of environmental pollution, fire, or explo-
sion.
Do not use means to accelerate the defrost-
ing process or to clean, other than those
recommended by the manufacturer.
The unit shall be stored in a room without
continuously operating ignition sources
(for example: open flames, an operating gas
appliance or an operating electric heater.)
Do not pierce or burn.
Be aware that refrigerants may not contain
an odour.
The unit shall be installed, operated and
stored in a room with a floor area according
to the following figure.
When installing an HBC, take safety mea-
sures in accordance with the European
Standard, based on the system refrigerant
amount and the room volume as shown in
the figure below. (The installation restric-
tions can be simply found by using the flow-
chart provided on a separate sheet.)
The unit shall be properly stored to prevent
mechanical damage.
0
10
20
30
40
50
60
70
80
0 50 100 150 200 250 300 350 400 450 500 550 600 650
At least two safety
measures are
required.
Room volume [m
3
]
System refrigerant amount [kg]
NG (ISO 5149)
At least one safety
measure is required.
Construction guidance
Children should be supervised to ensure
that they do not play with the appliance.
Do not operate the unit with the panels and
guards removed.
Rotating, hot, or high-voltage parts may cause injury,
electric shock, or fire.
Do not touch fans, heat exchanger fins, or
the sharp edges of components with bare
hands.
Doing so may result in injury.
Wear protective gloves when working on
the unit.
Failure to do so may result in injury.
High-pressure pipes poses a risk of burns if touched
with bare hands while the unit is in operation.
Check that markings of the unit are not illeg-
ible.
Illegible warning or caution markings may cause dam-
age to the unit, resulting in injury.
Transportation and Installation
When lifting the unit, pass the slings
through the four designated sling holes.
Improper lifting will cause the unit to topple or fall, re-
sulting in serious injury.
Do not lift the unit with the PP bands that are
used on some products.
Doing so may result in injury.
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iii
[3] Installation
[4] Piping Work
Observe the restrictions on the maximum
weight that a person can lift, which is spec-
ified in local regulations.
Failure to do so may result in injury.
Installation
Do not install the unit where combustible
gas may leak.
If combustible gas accumulates around the unit, fire or
explosion may result.
Do not allow children to play with the pack-
ing materials.
Suffocation or serious injury may result.
Cut up the packing materials before dispos-
al.
All installation work must be performed by
qualified personnel in accordance with this
manual.
Improper installation may result in refrigerant leakage,
water leakage, serious injury, electric shock, or fire.
If the air conditioner is installed in a small
room, take measures to prevent the refriger-
ant concentration from exceeding the safety
limit in the event of refrigerant leakage.
Consult your dealer regarding the appropriate mea-
sures to prevent the allowable concentration from be-
ing exceeded. If the refrigerant leaks and the allowable
concentration is exceeded, hazards due to a lack of ox-
ygen in the room will result.
Install the unit in accordance with the in-
structions to minimize the risk of damage
from earthquakes and strong winds.
Improper installation will cause the unit to topple, re-
sulting in serious injury.
The unit must be securely installed on a
structure that can sustain its weight.
Failure to do so will cause the unit to fall, resulting in se-
rious injury.
Do not open the control box cover when
charging refrigerant.
Doing so may cause sparks, resulting in fire.
Seal all openings around pipes and wires to
keep out small animals, rainwater, or snow.
Failure to do so may result in current leakage, electric
shock, or damage to the unit.
Do not install the unit where corrosive gas
may be generated.
Doing so can corrode the pipes, resulting in refrigerant
leakage and fire.
Piping Work
Piping work shall be kept to a minimum.
The pipes shall be protected from physical
damage.
Before heating the brazed sections, remove
the gas and oil that are trapped in the pipes.
Failure to do so may generate fire, resulting in serious
injury.
Do not purge the air using refrigerant. Use a
vacuum pump to evacuate the system.
Residual gas in the refrigerant lines will cause bursting
of the pipes or an explosion.
Do not use oxygen, flammable gas, or a re-
frigerant containing chlorine for air-tight-
ness testing.
Doing so may result in an explosion. Chlorine will dete-
riorate the refrigerant oil.
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iv
[5] Wiring Work
[6] Relocation and Repairs
When installing or relocating the unit, do
not allow air or any substance other than
the specified refrigerant to enter the refrig-
erant lines.
Any substance other than the specified refrigerant may
cause abnormally high pressure in the refrigerant
lines, resulting in bursting of the pipes or an explosion.
After the installation has been completed,
check for refrigerant leaks.
If the refrigerant leaks, oxygen starvation may result. If
the leaked refrigerant comes in contact with a heat
source, toxic gas will be generated.
Have a fire extinguisher nearby before braz-
ing work.
If the refrigerant leaks while brazing work is being per-
formed, fire may result.
Provide no-smoking signs at the brazing
workplace.
If the refrigerant leaks when an ignition source is pres-
ent, fire may result.
Pipes with outer diameter exceeding 33.4
mm are subject to the Pressure Equipment
Directive (PED), and brazing of these pipes
must be done by PED certified personnel.
Wiring Work
Include some slack in the power cables.
Failure to do so may break or overheat the cables, re-
sulting in smoke or fire.
Connections must be made securely and
without tension on the terminals.
Improperly connected cables may break, overheat, or
cause smoke or fire.
Tighten all terminal screws to the specified
torque.
Loose screws and contact failure may result in smoke
or fire.
Electrical work must be performed by quali-
fied personnel in accordance with local reg-
ulations and the instructions provided in
this manual. Only use the specified cables
and dedicated circuits.
Inadequate power source capacity or improper electri-
cal work will result in electric shock, malfunction, or
fire.
Install an earth leakage breaker on the pow-
er supply of each unit.
Failure to do so may result in electric shock or fire.
Only use properly rated breakers (an earth
leakage breaker, local switch <a switch +
fuse that meets local electrical codes>, or
overcurrent breaker).
Failure to do so may result in electric shock, malfunc-
tion, smoke, or fire.
Only use standard power cables of suffi-
cient capacity.
Failure to do so may result in current leakage, over-
heating, smoke, or fire.
Proper grounding must be provided by
qualified personnel.
Improper grounding may result in electric shock, fire,
explosion, or malfunction due to electrical noise. Do
not connect the ground wire to gas or water pipes,
lightning rods, or telephone ground wires.
After the wiring work has been completed,
measure the insulation resistance, and
make sure that it reads at least 1 MΩ.
Failure to do so may result in electric leakage, malfunc-
tion, or fire.
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v
[7] Additional Precautions
Relocation and Repairs
Only qualified personnel must relocate or
repair the unit. Do not attempt to disassem-
ble or alter the unit.
Failure to do so will result in refrigerant leakage, water
leakage, serious injury, electric shock, or fire.
Do not service the unit in the rain.
Doing so may result in electric leakage, electric shock,
wire shorting, malfunction, smoke, or fire.
Check for refrigerant leaks before service.
If the refrigerant leaks, fire may result.
Do not open the control box cover when re-
covering, charging, or purging refrigerant.
Doing so may cause sparks, resulting in fire.
Additional Precautions
Do not turn off the power immediately after
stopping operation.
Wait for at least five minutes after the unit has stopped
before turning off the power. Failure to do so may re-
sult in drain water leakage or the mechanical failure of
sensitive parts.
The unit must be periodically inspected by a
dealer or qualified personnel.
If dust or dirt accumulates inside the unit, the drain
pipes may become clogged, and water leakage from
the pipes may wet the surroundings and generate
odours.
Turn on the power at least 12 hours before
starting operation. Keep the power turned
on throughout the operating season.
Insufficient energizing will result in malfunction.
Do not use the air conditioner for special
purposes (e.g. keeping food, animals,
plants, precision devices, or art objects in a
room).
Such items could be damaged or deteriorated.
Collect the refrigerant and properly dispose
of it in accordance with local regulations.
Do not install the unit on or over items that
are subject to water damage.
When the room humidity exceeds 80% or if the drain
pipe is clogged, condensation may collect and drip
from the indoor unit onto the ceiling or floor.
Drain piping must be installed by a dealer or
qualified personnel to ensure proper drain-
age.
Improper drain piping may cause water leakage, result-
ing in damage to furniture and other surroundings.
Take appropriate measures against electri-
cal noise interference when installing the
unit in hospitals or radio communication fa-
cilities.
Inverter, high-frequency medical, or wireless communi-
cation equipment as well as power generators may
cause the air conditioning system to malfunction. The
air conditioning system may also adversely affect the
operation of these types of equipment by creating elec-
trical noise.
Insulate pipes to prevent condensation.
Condensation may collect and drip from the unit onto
the ceiling or floor.
Keep the service valves closed until refrig-
erant charging is completed.
Failure to do so will damage the unit.
Place a wet towel on the service valves be-
fore brazing the pipes to keep the tempera-
ture of the valves from rising above 120ºC
(248ºF).
Failure to do so may result in equipment damage.
Keep the flame out of contact with the ca-
bles and metal sheet when brazing the
pipes.
Failure to do so may result in burnout or malfunction.
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vi
Use the following tools specifically de-
signed for use with the specified refriger-
ant: Gauge manifold, charge hose, gas leak
detector, check valve, refrigerant charge
base, vacuum gauge, and refrigerant recov-
ery equipment.
Gas leak detectors for conventional refrigerants will not
react to a refrigerant that does not contain chlorine.
If the specified refrigerant is mixed with water, refriger-
ant oil, or another refrigerant, the refrigerant oil will de-
teriorate and the compressor will malfunction.
Use a vacuum pump with a check valve.
If the vacuum pump oil flows back into the refrigerant
lines, the refrigerant oil may deteriorate and the com-
pressor may malfunction.
Keep tools clean.
If dust, dirt, or water accumulates on the charging hose
or the flare processing tool, the refrigerant will deterio-
rate and the compressor will malfunction.
Use refrigerant piping made of phosphorus
deoxidized copper (copper and copper alloy
seamless pipes) that meets local require-
ments. Pipe joints should also meet local re-
quirements. Keep the inner and outer
surfaces of the pipes clean and free of sul-
phur, oxides, dust/dirt, shaving particles,
oils, moisture, or any other contaminants.
Contaminants on the inside of the refrigerant piping will
cause the refrigerant oil to deteriorate and cause the
compressor to malfunction.
Store pipes indoors, and keep both ends of
the pipes sealed until just before making a
flare connection or brazing. (Store elbows
and other joints in plastic bags.)
If dust, dirt, or water enters the refrigerant lines, the re-
frigerant oil will deteriorate and the compressor will
malfunction.
Braze the pipes with a nitrogen purge to
avoid oxidation.
Oxidized flux inside the refrigerant pipes will cause the
refrigerant oil to deteriorate and cause the compressor
to malfunction.
Do not use existing refrigerant piping.
The old refrigerant and refrigerant oil in the existing pip-
ing contain a large amount of chlorine, which will cause
the refrigerant oil in the new unit to deteriorate and
cause the compressor to malfunction.
If a large electric current flows due to a mal-
function or faulty wiring, earth-leakage
breakers on the unit side and on the up-
stream side of the power supply system
could both operate. Depending on the im-
portance of the system, separate the power
supply system or take protective coordina-
tion of breakers.
This appliance is intended to be used by ex-
pert or trained users in shops, in light indus-
try and on farms, or for commercial use by
lay persons.
This appliance is not intended for use by
persons (including children) with reduced
physical, sensory or mental capabilities, or
lack of experience and knowledge, unless
they have been given supervision or in-
struction concerning use of the appliance
by a person responsible for their safety.
Store the unit in a room large enough to al-
low clearance in the event of refrigerant
leakage.
Refrigerant R32 is flammable. Do not use a
naked-flame type detector.
Only qualified personnel may touch the
USB port in the control box.
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CONTENTS
HWE21050 GB
Chapter 1 Check Before Servicing
1-1 Preparation for Piping Work.................................................................................................................. 1
1-2 Handling and Characteristics of Piping Materials, Refrigerant, and Refrigerant Oil ....................... 3
1-3 Working with Refrigerant Piping......................................................................................................... 14
1-4 Precautions for Wiring......................................................................................................................... 19
1-5 Cautionary notes on installation environment and maintenance.................................................... 21
Chapter 2 Restrictions
2-1 System Configurations .......................................................................................................................... 1
2-2 Types and Maximum Allowable Length of Cables .............................................................................. 2
2-3 Switch Settings....................................................................................................................................... 3
2-4 M-NET Address Settings ....................................................................................................................... 4
2-5 Demand Control Overview .................................................................................................................... 9
2-6 System Connection Example .............................................................................................................. 10
2-7 Example System with an MA Remote Controller .............................................................................. 11
2-8 Example System with an ME Remote Controller............................................................................... 24
2-9 Example System with an MA and an ME Remote Controller............................................................ 26
2-10 Restrictions on Refrigerant Pipes ...................................................................................................... 29
Chapter 3 Major Components, Their Functions and Refrigerant Circuits
3-1 External Appearance and Refrigerant Circuit Components of Outdoor Unit ................................... 1
3-2 Outdoor Unit Refrigerant Circuit Diagrams ......................................................................................... 8
3-3 Functions of the Major Components of Outdoor Unit ...................................................................... 14
3-4 Functions of the Major Components of Indoor Unit ......................................................................... 16
3-5 External Appearance and Refrigerant Circuit Components of HBC................................................ 17
3-6 HBC Refrigerant Circuit Diagrams...................................................................................................... 22
3-7 Functions of the Major Components of HBC.....................................................................................24
Chapter 4 Electrical Components and Wiring Diagrams
4-1 Outdoor Unit Circuit Board Arrangement ............................................................................................ 1
4-2 Outdoor Unit Circuit Board Components ............................................................................................ 6
4-3 Outdoor Unit Electrical Wiring Diagrams........................................................................................... 17
4-4 Transmission Booster Electrical Wiring Diagrams........................................................................... 20
4-5 HBC Circuit Board Arrangement ........................................................................................................ 21
4-6 HBC Circuit Board Components......................................................................................................... 22
4-7 HBC Electrical Wiring Diagrams ......................................................................................................... 27
Chapter 5 Control
5-1 Dipswitch Functions and Factory Settings.......................................................................................... 1
5-2 Outdoor Unit Control ........................................................................................................................... 11
5-3 HBC Control.......................................................................................................................................... 22
Chapter 6 Test Run
6-1 Read before Test Run ............................................................................................................................ 1
6-2 Operation Characteristics and Refrigerant Charge ............................................................................ 2
6-3 Evaluating and Adjusting Refrigerant Charge..................................................................................... 2
6-4 The Following Symptoms Are Normal ................................................................................................. 4
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CONTENTS
HWE21050 GB
Chapter 7 Troubleshooting Using Error Codes
7-1 Error Code and Preliminary Error Code Lists ..................................................................................... 1
7-2 Error Code Definitions and Solutions: Codes [0 - 999].......................................................................8
7-3 Error Code Definitions and Solutions: Codes [1000 - 1999]............................................................. 11
7-4 Error Code Definitions and Solutions: Codes [2000 - 2999]............................................................. 15
7-5 Error Code Definitions and Solutions: Codes [3000 - 3999]............................................................. 24
7-6 Error Code Definitions and Solutions: Codes [4000 - 4999]............................................................. 26
7-7 Error Code Definitions and Solutions: Codes [5000 - 5999]............................................................. 48
7-8 Error Code Definitions and Solutions: Codes [6000 - 6999]............................................................. 61
7-9 Error Code Definitions and Solutions: Codes [7000 - 7999]............................................................. 81
7-10 Unit Error Code Definitions and Solutions: Codes [Er91 - Er99]..................................................... 90
Chapter 8 Troubleshooting Based on Observed Symptoms
8-1 MA Remote Controller Problems .......................................................................................................... 1
8-2 ME remote Controller Problems ........................................................................................................... 5
8-3 Refrigerant Control Problems ............................................................................................................. 10
8-4 Checking Transmission Waveform and for Electrical Noise Interference...................................... 15
8-5 Pressure Sensor Circuit Configuration and Troubleshooting Pressure Sensor Problems .......... 18
8-6 Troubleshooting Solenoid Valve Problems ....................................................................................... 22
8-7 Troubleshooting Outdoor Unit Fan Problems ...................................................................................23
8-8 Troubleshooting LEV, FCV Problems ................................................................................................ 24
8-9 Troubleshooting Problems with Major Components on HBC.......................................................... 34
8-10 Troubleshooting Inverter Problems ................................................................................................... 40
8-11 Control Circuit ...................................................................................................................................... 57
8-12 Measures for Refrigerant Leakage ..................................................................................................... 66
8-13 Parts Replacement Instructions (Outdoor Unit)................................................................................ 68
8-14 HBC Maintenance Instructions (Applicable to main and sub HBCs) ............................................ 127
8-15 Main-HBC Maintenance Instructions................................................................................................ 138
8-16 Sub-HBC Maintenance Instructions ................................................................................................. 177
8-17 Troubleshooting Problems Using the LED Status Indicators on the Outdoor Unit..................... 182
Chapter 9 USB Function
9-1 Service Overview.................................................................................................................................... 1
9-2 Operation Data Collection and Storage Functions (Outdoor unit) ................................................... 4
9-3 Software Rewrite Function on the USB (Outdoor unit, HBC) ............................................................ 8
9-4 Maintenance LED Display and Troubleshooting............................................................................... 10
Chapter 10 LED Status Indicators
10-1 LED Status Indicators (Outdoor unit) .................................................................................................. 1
10-2 LED Status Indicators (HBC)................................................................................................................. 4
10-3 LED Status Indicators Table.................................................................................................................. 6
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GB_BS_01_L
Chapter 1 Check Before Servicing
1-1 Preparation for Piping Work ................................................................................................................ 1
1-1-1 Read before Servicing ............................................................................................................................ 1
1-1-2 Tool Preparation ..................................................................................................................................... 2
1-2 Handling and Characteristics of Piping Materials, Refrigerant, and Refrigerant Oil...................... 3
1-2-1 Piping Materials ...................................................................................................................................... 3
1-2-2 Storage of Piping Materials..................................................................................................................... 4
1-2-3 Pipe Processing ...................................................................................................................................... 4
1-2-4 Differences in Refrigerant Properties...................................................................................................... 5
1-2-5 Precautions for handling equipment using R32 ...................................................................................... 6
1-2-6 Refrigerant Oil....................................................................................................................................... 13
1-3 Working with Refrigerant Piping ....................................................................................................... 14
1-3-1 Pipe Brazing.......................................................................................................................................... 14
1-3-2 Air Tightness Test................................................................................................................................. 15
1-3-3 Vacuum Drying ..................................................................................................................................... 16
1-3-4 Refrigerant Charging............................................................................................................................. 18
1-4 Precautions for Wiring ....................................................................................................................... 19
1-5 Cautionary notes on installation environment and maintenance .................................................. 21
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