Precautions For Devices That Use R410A Refrigerant; Before Getting Installed; Before Getting Installed (Moved)Electrical Work; Before Starting The Test Run - Mitsubishi Electric City Multi PWFY-P36NMU-E-BU Manuel D'installation

1.2. Precautions for devices that use R410A
refrigerant
Warning:
Do not use refrigerant other than the type indicated in the manuals
provided with the unit and on the nameplate.
during use, during repair, 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 resulting from the use of the wrong type of
refrigerant.
Caution:
Do not use the existing refrigerant piping.
- The old refrigerant and refrigerant oil in the existing piping contains a large
amount of chlorine which may cause the refrigerant oil of the new unit to
deteriorate.
- R410A is a high-pressure refrigerant and can cause the existing piping to
burst.
Use refrigerant piping made of C1220 (CU-D P) phosphorus deoxidi ed
copper as speci ed in the IS
less pipes and tubes". In addition, be sure that the inner and outer
surfaces of the pipes are clean and free of ha ardous sulphur, oxides,
dust/dirt, shaving particles, oils, moisture, or any other contaminant.
- Contaminants on the inside of the refrigerant piping may cause the refrig-
erant residual oil to deteriorate.
Store the piping to be used during installation indoors and keep both
ends of the piping sealed until just before bra ing. (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 ester oil, ether oil or alkylben ene (small amount) as the refrigerant
oil to coat ares and ange connections.
- The refrigerant oil will degrade if it is mixed with a large amount of mineral
oil.
Use li uid refrigerant to ll the system.
- If gas refrigerant is used to seal the system, the composition of the refrig-
erant in the cylinder will change and performance may drop.
Do not use a refrigerant other than R410A.
- If another refrigerant (R22, etc.) is mixed with R410A, the chlorine in the
refrigerant may cause the refrigerant oil to deteriorate.
Use a vacuum pump with a reverse ow check valve.
the refrigerant oil to deteriorate.
Do not use the following tools that are used with conventional refriger-
ants.
(Gauge manifold, charge hose, gas leak detector, reverse ow check
valve, refrigerant charge base, refrigerant recovery equipment)
- If the conventional refrigerant and refrigerant oil are mixed in the R410A,
the refrigerant may deteriorated.
- If water is mixed in the R410A, the refrigerant oil may deteriorate.
tional refrigerants will not react to it.
Do not use a charging cylinder.
- Using a charging cylinder may cause the refrigerant to deteriorate.
Be especially careful when managing the tools.
- If dust, dirt, or water gets in the refrigerant cycle, the refrigerant may dete-
riorate.

1.3. Before getting installed

Caution:
Do not install the unit where combustible gas may leak.
Do not use the air conditioner where food, pets, plants, precision in-
struments, or artwork are kept.
- The quality of the food, etc. may deteriorate.
Do not use the air conditioner in special environments.
the air conditioner or damage its parts.
When installing the unit in a hospital, communication station, or similar
place, provide suf cient protection against noise.
- The inverter equipment, private power generator, high-frequency medical
equipment, or radio communication equipment may cause the air condi-
tioner to operate erroneously, or fail to operate. On the other hand, the
air conditioner may affect such equipment by creating noise that disturbs
medical treatment or image broadcasting.
Do not install the unit on a structure that may cause leakage.
- When the room humidity exceeds 80 % or when the drain pipe is clogged,
condensation may drip from the indoor unit. Perform collective drainage
8
3300 "Copper and copper alloy seam-
1.4. Before getting installed (moved) -
electrical work
Caution:
Ground the unit.
- Do not connect the ground wire to gas or water pipes, lightning rods, or
Install the power cable so that tension is not applied to the cable.
Install a leak circuit breaker, as re uired.
Use power line cables of suf cient current carrying capacity and rating.
Use only a circuit breaker and fuse of the speci ed capacity.
Do not wash the air conditioner units.
Be careful that the installation base is not damaged by long use.
- If the damage is left uncorrected, the unit may fall and cause personal in-
jury or property damage.
Install the drain piping according to this Installation Manual to ensure
proper drainage. Wrap thermal insulation around the pipes to prevent
condensation.
and other possessions.
Be very careful about product transportation.
a means of transportation. It is dangerous.
base. Also support the unit at four points so that it cannot slip side ways.
Safely dispose of the packing materials.
cause stabs or other injuries.
play with them. If children play with a plastic bag which was not torn apart,

1.5. Before starting the test run

Error code "7130" appears when both of the following conditions are met.
- The PWFY unit is connected to the outdoor unit of Y series.
- The version of the software is the one listed below.
PWFY series: earlier than Ver. 1.13
Y(THMU/YHMU) series: earlier than Ver. 12.27
Y(TJMU/YJMU) series: earlier than Ver. 1.31
HP(ZUBADAN THMU) series: earlier than Ver. 22.27
HP(ZUBADAN) series: earlier than Ver. 11.31
WY series: earlier than Ver. 12.29
Caution:
Turn on the power at least 12 hours before starting operation.
-
- Starting operation immediately after turning on the main power switch can
result in severe damage to internal parts. Keep the power switch turned on
during the operational season.
Do not touch the switches with wet ngers.
Do not touch the refrigerant pipes during and immediately after opera-
tion.
- During and immediately after operation, the refrigerant pipes are may be
through the refrigerant piping, compressor, and other refrigerant cycle parts.
Your hands may suffer burns or frostbite if you touch the refrigerant pipes.
Do not operate the air conditioner with the panels and guards removed.
- Rotating, hot, or high-voltage parts can cause injuries.
Do not turn off the power immediately after stopping operation.
Do not touch the surface of the compressor during servicing.
compressor is operating.
Do not touch the panels near the fan exhaust outlet with bare hands:
they can get hot while the unit is in operation (even if it is stopped) or
immediately after operation and poses a risk of burns. Wear gloves to
protect your hands when it is necessary to touch the panels.
While the unit is in operation or immediately after operation, high-
temperature exhaust air may blow out of the fan exhaust outlet. Do not
hold your hands over the outlet or touch the panels near the outlet.
Be sure to provide a pathway for the exhaust air from the fan.
Water pipes can get very hot, depending on the preset temperature.
Wrap the water pipes with insulating materials to prevent burns.