Mitsubishi Electric PRC- 8MYA, PRC-12MYA, PRC-10MYA, PRC-15MYA, PRC-20MYA Operation Manual
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MITSUBISHI ELECTRIC AIR CONDITIONERS
CONTENTS
1. Safety precautions.
2. Caution before using.
3. Sectional names and functions.
4. How to conduct maintenance service.
5. Transferring work, and construction.
6. How to operate.
7. Troubleshooting.
8. Specification.
9. Special order.
PAGE
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Note
1. Please read this manual to operate safety before using.
2. Please keep this manual in the place where it is always seen to use this manual
with "Installation manual" after reading.
3. The customer must not install and not transfer the unit by themselves.
(Safety and the function cannot be secured.)
Service ref.
PRC- 8MYA(-03)
PRC-10MYA(-03)
PRC-12MYA(-03)
PRC-15MYA(-03)
PRC-20MYA(-03)
PRC-24MYA(-03)
PRC-32MYA(-03)
Model
PRC- 8MYA
PRC-10MYA
PRC-12MYA
PRC-15MYA
PRC-20MYA
PRC-24MYA
PRC-32MYA
Cooling only
OPERATION MANUAL
1
Warning.
Use only optional parts authorized by Mitsubishi Electric.
If the accessories are installed improperly, water leakage, electric shock
or fire may result.
Ask your dealer or an authorized company to install them.
Danger and the extent caused when wrong handling is done
are divided by displaying warning and attention and
are explained.
Before operating the unit ,make sure you read all the
"Safety precautions".
"Safety precautions" lists important points about safety.
Please be sure to follow them.
The display and its meaning are given below.
Warning
Erroneous handling gives a high possibility
to induce serious results such as death
or heavy injury.
Caution
Erroneous handling may induce serious
injury depending on the situation.
Warning.
Carefully read the labels affixed to the main unit.
1. Safety precautions.
Caution.
Ask your dealer or specialized subcontractor for
installation.
Conducting installation work by yourself improperly may cause
a fire, electric shock or water leakage.
1.1 Installation.
The Installation Manual details the suggested installation method.
Any structural alteration necessary for installation must comply with
local building code requirements.
After you have read this manual, keep it and the Installation
Manual in a safe place for easy reference whenever a question arises.
If the unit is going to be operated by another person, make sure
that this manual is given him or her.
The unit should not be installed by the user.
(Safety and the function cannot be secured.)
Never repair the unit, remodel or transfer it to another
site by yourself.
If they are performed improperly, water leakage, electric shock or
fire may result.
If you need to have the unit repaired or moved, consult your dealer.
Take a proper measure to suppress the critical
concentration of refrigerant, if leaked when installing
the unit in a small room.
The limit density is made not to be exceeded even if the refrigerant
leaks by any chance.
You are necessary to ventilation measures to prevent the accident.
If the refrigerant leaks, hypoxia accident may caused.
For the countermeasure to be taken, consult your dealer.
The unit should be securely installed.
If the unit is loosely mounted, it may fall, causing injury.
Never install on the place where a combustible gas might
leak.
The gas may ignite or explode when the gas leaks and collects
in surroundings of the unit.
Caution.
The unit should be installed in a location where air and
noise emitted by the unit will not disturb the neighbours.
2)
Drain piping (hose)
Caution.
3)
Power line, fuse or circuit breaker
Make sure that there is a main power switch.
4)
Earth connection
Remote controller is not allowed to install for the place
where direct sunshine strikes.
Please do not use the unit in the following places.
Place where a lot of oil (The machine oil is contained), moistures,
and dust exist.
Place where a lot of salinity such as beach districts exists.
Place where sulfur gas, volatile gas, and corroded gas are filled.
Place where acid solution is frequently used.
Place where special spray is frequently used.
Hot spring zone.
Near machine (high cycle welding machine etc.) generating high cycle.
Place where ventilation entrance of unit is closed by snowfall.
The main body might corrode when the unit is used in such a place,
the refrigerant leak, the performance of the unit decrease remarkably,
and it cause the damage of parts of the unit.
1)
Unit
Warning.
Please pay attention to the refrigerant (Freon gas).
A non flammable, non-toxic, odourless refrigerant is used for this air
conditioner.
The refrigerant is collected on the floor side in the room because the
specific gravity are larger than air. And, it causes the hypoxia accident.
When the refrigerant gas leaks by any chance, the user must ventilates
air enough by stopping the drive of the unit and opening the door.
Warning.
The unit must be installed on stable, level surface in a
place where there is no accumulation of snow, leaves or
rubbish.
Do not stand on, or place any item on the unit.
You may fall down or the item may fall, causing injury.
The heating of refrigerant is noted.
When the refrigerant touches the fire etc., it was decomposed and
a poisonous gas is generated.
Do not use the welding machine etc., in the room close up of the
installation of the air conditioner.
Install drain piping (hose) according to
Installation Manual to ensure proper drainage.
Improper drain piping (hose) may cause water
leakage and damage to furniture or other possessions.
Use breaker or fuse with proper capacity.
Using a wire or copper wire instead of proper capacity can cause fire
or trouble.
Other appliances connected to the same line could cause an overload.
When installing at a watery place, provide an electric
leak breaker.
Failure to mount the electric leak breaker may cause electric shock.
The unit must be properly earth connected.
Do not connect the earth wire to gas pipe, city water
pipe, lightning rod or telephone earth wire.
Improper earth connection may cause electric shock.
The symbols used here represent that as follows.
Never do this.
Never touch without wearing glove on your hands.
Make sure to connect earth line.
2
Warning.
1.2 During operation.
Never repair the unit, remodel or transfer it to another site
by yourself.
If repair is performed improperly, water leakage,
electric shock or fire may result.
If you need to have the unit repaired or moved,
consult your dealer.
Refrain from exposing yourself to cooled air for a long
time or cooling excessively.
Exercise particular care when children are present.
It may cause to deteriorate your physical condition or health.
Do not insert a finger or rod into
the air outlet and inlet.
It can cause injury as the fan inside is
rotating at high speed.
When the refrigerant gas leaks by any chance,
the user must ventilates air enough by stopping the drive
of the unit and opening the door.
When the unit is left just as it is,
it causes the hypoxia accident.
Consult your dealer or specialized subcontractor.
Do not wash the unit with water.
If washed with water, electric shock may be caused.
Do not remove the panel or the fan guard from
the unit when it is running.
You could be injured if you touch rotating, hot or high-voltage parts .
Do not handle the switch with wet hands.
Otherwise electric shock can be resulted.
At emergency (if you smell something burning), stop
operation and turn the power source switch off.
Continuing the operation without eliminating the emergency state may
cause a machine-trouble, fire, or electric shock.
When you notice exceptionally abnormal noise
or vibration, stop operation, turn off the power switch.
Continuing the operation without eliminating the emergency state
may cause a machine-trouble, fire, or electrical shock.
Do not touch the compressor or refrigerant
piping without wearing glove on your hands.
Touching directly such the parts can cause a burn
or frostbite as it becomes high or low temperature
according to the refrigerant state.
Do not touch the metal edges inside the unit without
wearing glove on your hands.
Touching directly it may injure your hands.
Do not leave the mounting base being damaged.
The damaged base may cause the falling down of the unit which may give injury.
For special use as for foods, animals/plants, precision
equipment or art objects, the applicability should be
confirmed earlier.
As the use for the applications other than that
designed originally may result in the deterioration
of the quality.
Consult your dealer in this regard.
Stop the operation and turn the power source switch off
for cleaning.
The fan inside rotating at high speed can cause injury.
Do not locate vessels filled with water like a flower vase
onto the unit.
Water if flooded may enter into the unit causing electric shock.
Do not step on or place something on the unit.
Neglecting this may cause injury by falling down.
The range of the use temperature is defended.
When the unit is used outside the use temperature range,
it occasionally cause the breakdown.
Use only the specified refrigerant (R-22) to charge
the refrigerant circuit.
Do not mix it with any other refrigerant and do not
allow air to remain in the circuit.
Air enclosed in the circuit can cause high pressure resulting in a
rupture and other hazards.
Do not place insect powder or combustible spray vessel
near the unit.
It may cause a fire or a unit's deformation.
Caution.
Change air frequently when the unit is operated together
with combustion equipment.
Insufficient ventilation can cause oxygen deficiency.
Do not place a gas heater or any other combustion
equipment near the unit.
It may result in the incomplete combustion of combustion equipment,
if it is exposed to airflow from the air conditioner directly.
It may result the unit's deformation by heat combustion equipment.
Never install on the place where a combustible gas
might leak.
The gas may ignite or explode when the gas leaks and collects in
surroundings of the unit.
Do not operate the air conditioner without the air filter set
place.
Dust may accumulate, and cause a failure.
Never block or cover the unit's intake or outlets.
It will reduce the unit's efficiency.
Do not place animals or plants at a spot directly exposed
to airflow from the air conditioner.
The airflow can give a negative effect to them.
Remote controller should be pushed with finger.
It occasionally causes the electric shock and the breakdown.
Do not place objects under the units to avoid damage
of condensation.
When the room is high humidity or when the drain pipe is clogged,
water may drip from the indoor unit.
Do not operate the air conditioner without the eliminator
set place.
Drain may drop into down flow supply duct.
After stopping operation, be sure to wait for three minutes
before turning on the operation switch.
The unit failure may occur.
2. Caution before using.
For safety, confirm that the earth terminal has been
connected to the earth wire correctly.
Never block or cover the unit's intakes or outlets.
It will reduce the unit's efficiency.
To start the unit again after once stopped, be sure to turn
the start switch on after 3 minutes elapsed.
Repeating stopping and starting within 3 minutes gives improper force
to the machine which can cause to trip the fuse or power source switch.
3. Sectional names and functions.
3
4.1 Cleaning of panel.
Clean dirt of panel as follows.
Use a household neutral cleanser such as for dishes or vegetables.
Moisten a soft cloth with the cleanser, then wipe lightly.
Next, wipe three or four times with another soft cloth moisten with water.
Finally, wipe off all the remaining cleanser with a soft cloth.
Moisten a soft cloth with the alcohol, then wipe off lightly.
Isopropyl alcohol is sold at stores as reagents in small quantities.
Neutral
cleanser
Isopropyl
alcohol
Paste
Note.
Alcohol is highly combustible.
Take extreme care when handling.
Also, do not use paint or adhesive thinner.
Adhesive
Grease
Finger marks
4. How to conduct maintenance service.
For superior performance and lasting durability,
please do not forget to conduct proper and regular maintenance.
Warning
1. Do not wash the unit with water.
If washed with water, electrical shock may be caused.
2. Ahead of the maintenance.
For safety, turn the power source off before service work.
4.2 Cleaning the outdoor Heat Exchanger
If you use your air conditioner for prolonged periods,
the outdoor heat exchanger will become dirty,
impairing its function and reducing air
conditioners performance.
Consult your equipment supplier or
air conditioning contractor on how to
clean the heat exchanger.
Heat exchanger
PRC-8
PRC-10
PRC-12
PRC-15
PRC-20
PRC-24
PRC-32
Air inlet
Air outlet
Air inlet
Air inlet
Wiring hole
Drain pipe
Control module
Service panel
Air inlet
Air outlet
Air inlet
Air inlet
Drain pipe
Service panel
Air outlet
Air outlet
Service panel
Wiring hole
Control module
4.5 In case of failure.
1. Never remodel the air conditioner.
Consult your dealer for any repair service.
Improper repair work can result in water leakage, electric shock, fire, etc.
2. If the poser breaker is frequently activated, get in touch with your dealer.
Leaving the unit as it is under such conditions can result in fire or failure.
3. If the refrigeration gas blows out or leaks, stop the operation of the
air conditioner.
4. Thoroughly ventilate the room, and contact your dealer.
Leaving the unit as it is can result in accidents due to oxygen deficiency.
4.3 When beginning to use air conditioner
again.
Please turn on the power supply after confirming an following check is
done and abnormality is not found.
Please do the following work.
It is confirmed that air inlet and outlet are not blocked.
It is confirmed that the earth connection line does not come off.
The earth connection line is installed surely in the unit.
It is confirmed that there are neither lifting, blocking, no bending about
the drain-hose.
1. It is confirmed to keep the controller OFF.
2. The power supply switch is turned on.
4.4 When the air conditioner is not to be
used for long time.
If the air conditioner is not to be used for a long time due to a seasonal
change, etc.,
Please do the following work.
1. The power supply switch is turned off.
If the power supply is kept on, several watts or several tends of
watts will be wasted.
2. Filter, eliminator and drain pan are cleaned.
Pay attention to throw dust in the drain.
3. Run it for 4-5 hours with the air blowing until the inside is
completely dry.
Failing to do so can result the growth of unhygienic, unhealthy
mold in scattered areas throughout the room.
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