MITSUBISHI ELECTRIC PEFY-P0 6 Air Conditioners Indoor Unit Instructions

MITSUBISHI ELECTRIC PEFY-P0 6 Air Conditioners Indoor Unit

Product Information

Specifications

• Model: PEFY-P06,08,12,15,24,27,36,48,54NMAU-E4 PEFY-P18,30NMAU-E5
• Unit Type: Indoor Air Conditioner

Product Usage Instructions

Safety Precautions

Please read and follow the safety precautions below before operating the air- conditioner unit:

• Read the entire operation manual before use.
• Ensure proper installation and grounding of the unit.
• Do not operate the unit with wet hands.
• Do not obstruct the air inlet or outlet of the unit.
• Do not use the unit for purposes other than its intended use.

Wired Remote Controller

The air-conditioner unit comes with a wired remote controller for easy operation. The remote controller features the following buttons:

• [ON/OFF] button: Press to turn ON/OFF the indoor unit.
• [SELECT/HOLD] button: Press to save the setting. Enables/disables the HOLD function in the Main menu.
• [RETURN] button: Press to return to the previous screen.
• [MENU] button: Press to bring up the Main menu.

Operation Modes

The air-conditioner unit offers different operation modes. Use the function buttons on the remote controller to change the operation mode:

• [F1] button: Press to change the operation mode.

Temperature Control

You can adjust the temperature of the air-conditioner unit using the function buttons on the remote controller:

• [F2] button: Press to decrease temperature.
• [F3] button: Press to increase temperature.

Fan Speed ​​Control

The air-conditioner unit allows you to adjust the fan speed. Use the function buttons on the remote controller to change the fan speed:

• [F4] button: Press to change the fan speed.

Display Modes

The air-conditioner unit has two different display modes: Full and Basic. The factory setting is Full mode, but you can switch to Basic mode by changing the setting on the Main display:

• Full mode: All icons are displayed for explanation.
• Basic mode: Simplified display mode.

FAQ

• Q: How do I turn ON/OFF the air-conditioner unit?
• A: Press the [ON/OFF] button on the wired remote controller to turn ON/OFF the indoor unit.
• Q: How do I change the operation mode?
• A: Use the [F1] button on the wired remote controller to change the operation mode.
• Q: How do I adjust the temperature?
• A: Press the [F2] button to decrease the temperature or the [F3] button to increase the temperature.
• Q: How do I change the fan speed?
• A: Use the [F4] button on the wired remote controller to change the fan speed.
• Q: How do I switch between Full and Basic display modes?
• A: Change the setting on the Main display to switch between Full and Basic display modes.

OPERATION MANUAL
For safe and correct use, please read this operation manual thoroughly before operating the air-conditioner unit.

Wired remote controller

Controller interface

1. [ON/OFF] button
   Press to turn ON/OFF the indoor unit.

2. [SELECT/HOLD] button
   Press to save the setting.
   When the Main menu is displayed, pressing th is button will enable/disable the HOLD function.

3. [RETURN] button
   Press to return to the previous screen.

4. [MENU] button
   Press to bring up the Main menu.

5. Backlit LCD
   Operation settings will appear.
   When the backlight is off, pressing any button turns the backlight on and it will stay lit for a certain period depending on the screen.
   When the backlight is off, pressing any button turns the backlight on and does not perform its function. (except for the [ON/OFF] button)

6. ON/OFF lamp
   This lamp lights up green while the unit is in operation. It blinks while the remote controller is starting up or when there is an error.
   The functions of the function buttons change depending on the screen. Refer to the button function guide that appears at the bottom of the LCD for the functions they serve on a given screen.
   When the system is centrally controlled, the button function guide that corresponds to the locked button will not appear.

7. Function button [F1]
   Main display: Press to change the operation mode.
   Menu screen: The button function varies with the screen.

8. Function button [F2]
   Main display: Press to decrease temperature.
   Main menu: Press to move the cursor left.
   Menu screen: The button function varies with the screen.

9. Function button [F3]
   Main display: Press to increase temperature.
   Main menu: Press to move the cursor right.
   Menu screen: The button function varies with the screen.

10. Function button [F4]
    Main display: Press to change the fan speed.
    Menu screen: The button function varies with the screen.

Display

The main display can be displayed in two different modes: “Full” and “Basic.” The factory setting is “Full.” To switch to the “Basic” mode, change the setting on the Main display setting.

1. Operation mode
   Indoor unit operation mode appears here.

2. Set temperature
   The set temperature appears here.

3. Clock
   The current time appears here.

4. Fan speed
   The fan speed setting appears here.

5. Button function guide
   The functions of the corresponding buttons appear here.

6. Appears w h en th e ON/OFF operation is centrally controlled.

7. Appears when the operation mode is centrally controlled.

8. Appears when the set temperature is centrally controlled.

9. Appears when the filter reset function is centrally controlled.

10. Indicates when the filter needs maintenance.

11. Room temperature
    The current room temperature appears here.

12. Appears w h en the buttons are locked.

13. Appears when the On/Off timer or Auto-off timer function is enabled.

    • appears when the timer is disabled by the centralized control system.
    • appears when the HOLD function is enabled.

14. Appears when the Weekly timer is enabled.

15. Appears while the units are operated in the energy-save mode. (Will not appear on
    some models of indoor units)

16. Appears while the outdoor units are operated in silent mode.

17. • Appears when the built-in thermistor on the remote controller is activated to monitor the room temperature (11).
    • appears when the thermistor on the indoor unit is activated to monitor the room temperature.

18. Indicates the vane setting.

19. Indicates the Louvre setting.

20. Indicates the ventilation setting.

21. Appears when the set temperature range is restricted.

22. Centrally controlled
    Appears for a certain time when a centrally controlled item is operated.

23. Error display
    An error code appears during the error.

When an error code is displayed on the main display, an error occurs but the indoor unit can keep its operation. If an error occurs, note the error code and consult your dealer.
Most settings (except ON/OFF, mode, fan speed, and temperature) can be made from the Main menu.

Note: If you use oth er remote controllers, refer to eith er Installation Manual or Initial Setting Manual th at comes w ith th e controller to be used.

Safety precautions

• Before operating the unit, make sure you read all the “S afety precautions”.
• “S afety precautions” lists important points about safety. Please be sure to follow them.

Symbols used in the text

Warning
Describes precautions that should be observed to avoid the risk of injury or death to the user.

Caution
Describes precautions that should be observed to prevent damage to the unit.
Symbols used in the illustrations

• Indicates an action th at must be avoided.
• Indicates th at important instructions must be follow ed.
• Indicates a part w h ich must be grounded.
• Indicates th at caution sh ould be taken w ith rotating parts. (Th is symbol is displayed on th e main unit label.) < Color: yellow >
• Bew are of electric sh ock (Th is symbol is displayed on th e main unit label.) < Color: yellow >

Warning
Carefully read the labels affixed to the main unit.

Installation

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 to him or her.

Warning

• The unit should not be installed by the user. Ask the dealer or an authorized company to install the unit. If the unit is installed improperly, water leak age, electric shocf or fire may result.
• Use only accessories authorized by Mitsubishi Electric and ask your dealer or an authorized company to install them. If accessories are installed improperly, flater leafage, electric shocf or fire may result.
• The Installation Manual details the suggested installation method. Any structural alteration necessary for installation must comply with local building code requirements.
• Never repair the unit or transfer it to another site by yourself. If repair is performed improperly, flater leafage, electric shoc or fire may result. If you need to have the unit repaired or moved, consult your dealer.
• Keep the electric parts away from water (washing water) etc.
• It might result in electric shoc, catching fire or smoe.
• Note1: W hen washing the Heat Exchanger and Drain Pan, ensure the Control B ox, Motor and LEV remain dry, using a water proof covering.
• Note2: Never drain the washing water for the Drain Pan and the Heat Exchanger using the Drain Pump. Drain separately.
• The appliance is not intended for use by young children or infirm persons without supervision.
• Young children should be supervised to ensure that they do not play with the appliance.
• Do not use a leak detection additive.
• Do not use refrigerant other than the type indicated in the manuals provided with the unit and on the nameplate.
• Doing so may cause the unit or pipes to burst, or result in explosion or fire during use, during repair, or at th e time of disposal of th e unit.
• It may also be in violation of applicable law s.
• MITSUBISHI ELECTRIC CORPORATION cannot be h eld responsible for malfunctions or accidents resulting from th e use of th e w rong type of refrigerant.

Outdoor unit

Warning

• The outdoor unit must be installed on a stable, level surface, in a place where there is no accumulation of snow, leaves or rubbish.
• Do not stand on, or place any items on the unit. You may fall down or the item may fall, causing injury.

Caution
The outdoor unit should be installed in a location where air and noise emitted by the unit will not disturb the neighbours.

Indoor unit
Warning:
The indoor unit should be securely installed. If the unit is loosely mounted, it may fall, causing injury.

Remote controller
Warning:
The remote controller should be installed in such a way that children cannot play with it.

Drain hose
Caution:
Make sure that the drain hose is installed so that drainage can go ahead smoothly. Incorrect installation may result in water leakage, causing damage to furniture.

Power line, fuse or circuit breaker
Warning:

• Make sure that the unit is powered by a dedicated supply. Other appliances connected to the same supply could cause an overload.
• Make sure that there is a main power switch.
• Be sure to adhere to the unit’s voltage and fuse or circuit breaker ratings.
• Never use a piece of wire or a fuse with a higher rating than the one specified.

Grounding
Caution

• The unit must be properly grounded. Never connect the grounding wire to a gas pipe, water pipe, lightning conductor or telephone grounding wire. If the unit is not grounded properly, electric shock may result.
• Check frequently that the ground wire from the outdoor unit is properly connected to both the unit’s ground terminal and the grounding electrode.

During operation
Caution:

• Do not use any sharp object to push the buttons, as this may damage the remote controller.
• Do not twist or tug on the remote controller cord as this may damage the remote controller and cause malfunction.
• Never remove the upper case of the remote controller. It is dangerous to remove the upper case of the remote controller and touch the printed circuit boards inside. Doing so can result in fire and failure.
• Never wipe the remote controller with benzene, thinner, chemical rags, etc.
• Doing so can result in discoloration and failure. To remove heavy stains, soak a cloth in neutral detergent mixed with water, wring it out thoroughly, wipe the stains off, and wipe again with a dry cloth.
• Never block or cover the indoor or outdoor unit’s intak es or outlets. Tall items of furniture underneath the indoor unit, or bulky items such as large boxes placed close to the outdoor unit will reduce the unit’s efficiency.

warning

• Do not splash water over the unit and do not touch the unit with wet hands.
• An electric shock may result.
• Do not spray combustible gas close to the unit. Fire may result.
• Do not place a gas heater or any other open flame appliance where it will be exposed to the air discharged from the unit. Incomplete combustion may result.

Warning

• Do not remove the front panel or the fan guard from the outdoor unit when it is running. You could be injured if you touch rotating, hot or high-voltage parts.
• Never insert fingers, stics etc. into the intaes or outlets, otherwise injury may result, since the fan inside the unit rotates at high speed. Exercise particular care when children are present.
• If you detect odd smells, stop using the unit, turn off the power switch and consult your dealer. wtherwise, a breawdown, electric shocw or fire may result.
• When you notice exceptionally abnormal noise or vibration, stop operation, turn off the power switch, and contact your dealer.
• Do not over-cool. The most suitable inside temperature is one that is within 5 ° C of the outside temperature.
• Do not leave handicapped people or infants sitting or standing in the path of the airflow from the airwconditioner. This could cause health problems.

Caution:

• Do not direct the airflow at plants or caged pets.
• Ventilate the room frequently. If the unit is operated continuously in a closed room for a long period of time, the air will become stale.

In case of failure
Warning:

• Never remodel the air conditioner. Consult your dealer for any repair or service. Improper repair or can result in water leakage, electric shock, fire, etc.
• If the remote controller displays an error indication, the air conditioner does not run, or there is any abnormality, stop operation and contact your dealer.
• Leaving the unit as it is under such conditions can result in fire or failure.
• If the power breaker is frequently activated, get in touch with your dealer.
• Leaving it as it is can result in fire or failure.
• If the refrigeration gas blows out or leaks, stop the operation of the air conditioner, thoroughly ventilate the room, and contact your dealer. Leaving the unit as it is can result in accidents due to oxygen deficiency.

When the air conditioner is not to be used for a long time

• If the air conditioner is not to be used for a long time due to a seasonal change, etc., run it for 4 – 5 hours with the air blowing until the inside is completely dry. Failing to do so can result in the growth of unhygienic, unhealthy mold in scattered areas throughout the room.
• When it is not to be used for an extended time, keep the [power supply] turned OFF.
• If the power supply is kept on, several watts or several tens of watts will be asted. Also, the accumulation of dust, etc., can result in fire.
• Keep the power switched ON for more than 12 hours before starting operation. Do not turn the power supply OFF during seasons of heavy use. Doing so can result in failure.

Disposing of the unit
Warning:

When you need to dispose of the unit, consult your dealer. If pipes are removed incorrectly, refrigerant (fluorocarbon gas) may blow out and come into contact with your skin, causing injury. Releasing refrigerant into the atmosphere also damages the environment.

Names and functions of various parts

Attachment and detachment of filter

Caution

• In removing the filter, precautions must be taken to protect your eyes from dust. Also, if you have to climb up on a stool to do the job, be careful not to fall.
• Turn off the power supply when the filter is changed.

How to operate

Turning ON/OFF

ON

• Press the [ON/OFF] button.
• The ON/OFF lamp will light up in green, and the operation will start.
• The unit will operate with the previously-set operation mode, set temperature, and fan speed.

OFF

• Press the [ON/OFF] button again.
• The ON/OFF lamp will come off, and the operation will stop.

Operation mode

• Each pressing of th e [F1] button cycles th rough th e follow ing operation modes. Select the desired operation mode.

• Operation modes that are not available for the connected indoor unit w ill not appear on th e display.

• Depending on the indoor unit model, either one or tw o set temperatures (single or dual set point(s)) can be set for Auto mode.

What the blink ing mode icon means
The mode icon will blink wh n other indoor units in the same refrigerant system (connected to the same outdoor unit) are already operated in a different mode. In this case, the rest of the units in the same group can only be operated in the same mode.

Drying mode

• The indoor fan turns to th e low -speed operation, disabling th e ch ange of fan speed.
• Dry operation cannot be carried out at room temperature of less than 18°C.
• The dry is a microcomputer-controlled deh umidifying operation which controls excessive air-cooling according to the room temperature of your choice. (Not usable for heating.)

1. Until reaching room temperature of your choice The compressor and indoor fan function is linked motion according to the change of the room temperature and automatically repeat ON/OFF.
2. When reaching room temperature of your choice Both the compressor and indoor fan stop. When stop continues for 10 minutes, the compressor and indoor fan are operated for 3 minutes to keep the humidity low.

Heat mode

• D EFROST” display
• Displayed only during the defrosting operation.
• S TAND BY” display
• Displayed from the start of heating operation until the moment warm air blows out.

Caution

• Never expose your body directly to cool air for a long time. Excessive
  exposure to cool air is bad for your health, and should therefore be avoided.

• When the air-conditioner is used together with burners, thoroughly ventilate the area. Insufficient ventilation can result in accidents due to oxygen deficiency.

• Never place a burner at a place where it is exposed to the airflow from the air- conditioner. Doing so can result in imperfect combustion of the burner.

• The microcomputer functions in the following cases:

• Air does not blow out when heating starts.

• To prevent any cool air from escaping, the indoor fan is gradually switched in sequence from faint airflow/weak airflow/set airflow according to the temperature rise of the blown out air. Wait a moment until the airflow comes out naturally.

• The fan is not moving at the set speed.

• In some models, the system switches over to faint airflow when the temperature of the room reaches the set temperature. In other cases, it stops to prevent any cool air from escaping during the defrosting operation.

• Air flows out even if operation is stopped.

• Approximately 1 minute after the stop of operation, the indoor fan sometimes rotates to eliminate extra heat generated by the electric heater, etc. The fan speed comes to low or high.

Auto (dual set point) and Setback modes
When the operation mode is set to the Auto (dual set point) mode or the Setback mode, two set temperatures (one each for cooling and h eating) can be set. Depending on the room temperature, indoor unit will automatically operate in eith er the cooling or heating mode and keep the room temperature with in the preset range.

Differences between the two modes
Auto (dual set point) mode The set temperatures that are specified for the Cool/Drying mode and the Heat mode will be used to automatically control the room temperature to stay within the set temperatures. This mode is especially effective during the in-between seasons, when the temperature difference between the highest and the lowest is large and both heating and cooling modes are used within the same day.

Setback mode
Room temperature is controlled to stay within the set temperature range that is specified for the Setback mode. By leaving sufficient temperature differential between the set temperature for cooling (upper limit) and heating (lower limit), it is possible to keep the room temperature within the specified range without overworking the air conditioners. This setting will be especially effective during periods of non-occupancy.

Set temperature
<Cool, Drying, Heat, and Auto (single set point) >

• Press the [F2 button to decrease the set temperature, and press the [F3] button to increase.
• Refer to the table below for the settable temperature range for different operation modes.
• Set temperature cannot be set for the Fan mode.
• Depending on the Temperature unit setting, temperatures will decrease or increase by 0.5°C, 1°C, 1ºF, or 2ºF increments.

< Auto (dual set point) or Setback mode>

• The current set temperatures will appear.
• Press the [F2] or [F3] button to display the Settings screen.

Set temperature range

Auto

(single set point)

| 19ºC–28ºC/67ºF–83ºF 12
Auto

(dual set points)

| Cool: Same as the set temperature range for Cool mode Heat: Same as the set temperature range for Heat mode 23*4
Setback| Cool: Preset temperature range for the Cool mode Heat: Preset temperature range for the Heat mode
Fan| Not settable

1. The settable temperature ranges vary, depending on the indoor unit model.
2. The set temperature for Auto mode (either single or dual set points)) will appear depending on the indoor unit model.
3. The same values are used for the set temperature for Cool/Drying mode and the cooling set temperature for Auto mode (dual set points). Likewise, the same values are used for the set temperature for Heat mode and the heating set temperature for Auto mode (dual set points).
4. The cooling and heating set temperatures can be set under the following conditions.
   • The cooling set temperature is greater than the heating set temperature.
   • The difference between the cooling and heating set temperatures is equal or greater than the minimum temperature difference that varies with the indoor unit  model.

Fan speed

This setting can be adjusted only with MA remote controller.
The actual fan speed will differ from the fan speed displayed on the LCD when one of the following conditions is met.

1. While “STAND BY” or “DEFROST” is displayed
2. When the room temperature is higher than the set temperature during the heating mode
3. Immediately after the heating operation (during stand by for switching the operation mode)
4. During the Dry mode

HOLD setting

Press the HOLD button to enable/disable the HOLD function.
If the HOLD function is enabled, the following functions will be prohibited, and will appear.

• ON/OFF timer
• Auto-Off timer
• Weekly timer
• Automatic return to the preset temperature

The smart way to use

Even minimal steps to care for your air conditioner can help make its use far more effective in terms of air-conditioning effect, electricity charges, etc.
Set the right room temperature

• In cooling operation, a temperature difference of about 5°C [9°F] between indoors and outdoors is optimum.
• If the room temperature is raised by 1°C [2°F] during air-cooling operation, about 10% electric power can be saved.
• Excessive cooling is bad for health. It also results in the waste of electric power.

Clean the filter thoroughly
If the screen of the air filter becomes clogged, the airflow and air- conditioning effect can be significantly reduced. Further, if the condition is left unattended, failure can result. It is particularly important to clean the filter at the beginning of the cooling and heating seasons. (When profuse dust and dirt have accumulated, clean the filter thoroughly.)

Prevent intrusion of heat during air-cooling
To prevent the intrusion of heat during cooling operation, provide a curtain or a blind on the window to block out direct sunlight. Also, do not open the entrance or exit except in cases of dire necessity.

Carry out ventilation sometimes
Since the air periodically gets dirty in a room that is kept closed for a long time, ventilation is sometimes necessary. When gas appliances are used together with the air conditioner, special precautions must be taken. If the “LOSSNAY” ventilation unit developed by our company is used, you can perform ventilation with less waste. For details on this unit, consult with your dealer.

Caring for the machine
Always have filter maintenance performed by a service person. Before care- taking, turn the power supply OFF.

Caution:

• Before you start cleaning, stop operation and turn OFF the power supply.
• Remember that the fan is rotating inside at high speed, posing a serious risk of injury.
• Indoor units are equipped with filters to remove the dust of sucked-in air.
• Clean the filters following the procedures on the right. (The standard filter should normally be cleaned once a week, and the long-life filter at the beginning of each season.)
• The life of the filter depends on where the unit is installed and how it is operated.

How to clean
Clear dust away lightly or clean it up with a vacuum cleaner. In the case of severe staining, wash the filter in lukewarm water mixed with dissolved neutral detergent or water, and then rinse off the detergent completely. After washing, dry it and fix it back into place.
Caution:
Do not dry the filter by exposing it to direct sunlight or warming it using fire, etc. Doing so can result in the deformation of the filter.
Washing it in hot water (more than 50°C [122°F]) can also result in deformation.
Caution:
Never pour water or flammable sprays onto the air conditioner. Cleaning using these methods can result in the failure of the air conditioner, electric shock, or fire.

Troubleshooting

• When an error occurs, the following screen will appear and the operation LED will blink.
• Check the error status, stop the operation, and consult your dealer.
• Error code, error unit, refrigerant address, unit model name, and serial number will appear.
• The model name and serial number will appear only if the information has been registered.
• Press the [F1] or [F2] button to go to the next page.

Before vou ask for repair service, check the followina points:

No display appears even when the [ON/OFF] button is pressed.

| Power failure| Press the [ON/OFF] button after power restoration.
The power supply is turned OFF.| Turn the power supply ON.
The fuse in the power supply is gone.| Replace fuse.
The earth leakage breaker is gone.| Put in the earth leakage breaker.
Air fows out but it does not cool enough or heat enough.| The liquid crystal display shows that it is in the state of operation.| Improper temperature adjustment| After checking the set temperature and inlet temperature on the liquid crystal display, refer to section 3.3 “Set temperature”, and operate the adjustment button.
The filter is filled with dust and dirt.| Clean up the filter.

(Refer to section 5 “Caring for the machine”.)

There are some obstacles at the air inlet and outlet of the indoor and outdoor units.| Remove.
Windows and doors are open.| Close.
Cool air or warm air does not come out.| The liquid crystal display shows that it is in operation.| The restart-preventing circuit is in operation for 3 minutes.| Wait for a while.

(To  protect the compressor, a 3- minute restart-preventing circuit is built into the indoor unit. Therefore, there are occasions sometimes when the compressor does not start running

immediately. There are cases when it does not run for as long as

3 minutes.)

Indoor unit operation was restarted during the heating and defrosting operation.| Wait for a while.

(Heating operation starts after ending defrosting operation.)

It runs briefy, but soon

stops.

| The “CHECK” and check code

fash on the liquid crystal display.

| There are some obstacles at the air inlet and outlet of the indoor and outdoor units.| Rerun after removal
The filter is filled with dust and dirt.| Rerun after cleaning the filter. (Refer to section 5 “Caring for the

machine”.)

The sound of the exhaust and rotation of the motor can still be heard after stop of running.| All lights are out except the ruled line and clock.| When other indoor units are engaged in cooling operation, the machine stops after running a drain-up mechanism for 3 minutes when air-cooling operation is stopped.| Wait for 3 minutes.
The sound of the exhaust and the rotation of the motor can be heard intermittently after stop of running.| All lights are out except the ruled line and clock.| When other indoor units are engaged in cooling operation, drained water is brought in. If the drain water is collected, the drain- up mechanism initiates a draining operation.| It soon stops. (If the noise occurs more than 2-3 times in an hour, ask for repair service.)
 | |
Warm air comes out intermittently when the thermostat is OFF or during fan operation.| The liquid crystal display shows that it is in the state of operation.| When other indoor units are engaged in heating operation, the control valves are opened and closed from time to time to maintain the stability of the system.| It soon stops. (If the room temperature rises uncomfortably high in a small room, stop operation.)

If operation stops due to a power failure, the [restart-preventing circuit at power failure] operates and disables unit operation even after power restoration. In this case, press the [ON/OFF] button again and start operation. checked the above, turn the power supply OFE and contact vour dealer with information about the product name the nature of the If malfunctions persist after you have checked the above, turn the power supply OFF and contact your dealer with information about the product name, the nature of the malfunction, etc. If the display of error information flashes, tell the dealer contents of the display (error code). Never attempt to repair by yourself.

The following symptoms are not air conditioner failures:

• The air blown out from the air conditioner can sometimes give off odors. This is due to cigarette smoke contained in the air of the room, the smell of cosmetics, the walls, furniture, etc., absorbed in the air conditioner.
• A hissing noise can be heard immediately after the air conditioner is started or stopped. This is the sound of the refrigeration flowing inside the air conditioner. This is normal.
• The air conditioner sometimes snaps or clicks at the beginning or end of cooling/heating operation. This is the sound of friction on the front panel and other sections due to expansion and contraction caused by temperature change. This is normal.
• The fan speed changes in spite of not changing the setting. Not to blow out cold air at the beginning of heating operation, the air conditioner automatically adjusts the fan speed gradually from lower to the set speed. It also adjust its fan speed to protect the fan motor when return air temperature or fan speed excessively rises.

Installation, transferring works, and checking

Regarding place for installation
Consult with your dealer for details on installation and transferring the installation.

Caution:
Never install the air conditioner where there is a risk of leakage of flammable gas.
If gas leaks and accumulates around the unit, fire can result.
Never install the air conditioner at the following place:

• where there is a lot of machine oil
• near the ocean and beach areas where there is salt air
• where humidity is high
• where there are hot springs nearby
• where there is sulphurous gas
• where there is a high-frequency processing machinery (a high-frequency welder, etc.)
• where acid solution is frequently used
• where special sprays are frequently used

Install the indoor unit horizontally. Otherwise, water leakage can result.
Take sufficient measures against noise when installing the air conditioners at hospitals or communication-related businesses.
If the air conditioner is used in any of the above-mentioned environments, frequent operational failure can be expected. It is advisable to avoid these types of installation sites.
For further details, consult with your dealer.

Regarding electrical work
Caution:
The electrical work must be undertaken by a person who is qualified as an electrical engineer according to the [technical standard respecting electrical installation], [internal wiring rules], and the installation instruction manual with the absolute use of exclusive circuits. The use of other products with the power source can result in burnt-out beakers and fuses.

• Never connect the grounding wire to a gas pipe, water pipe, arrester, or telephone grounding wire. For details, consult with your dealer.
• In some types of installation sites, the installation of an earth leakage breaker is mandatory. For details, consult with your dealer.

Regarding transfer of installation

• When removing and reinstalling the air conditioner when you enlarge your home, remodel, or move, consult with your dealer in advance to ascertain the cost of the professional engineering work required for transferring the installation.

Caution:
When moving or reinstalling the air conditioner, consult with your dealer. Defective installation can result in electric shock, fire, etc.
Regardina noise

• In installing work, choose a place that can fully bear the weight of the air conditioner, and where noise and vibration can be reduced.
• Choose a place where cool or warm air and noise from the outdoor air outlet of the air conditioner does not inconvenience the neighbors.
• If any alien object is placed near the outdoor air outlet of the air conditioner, decreased performance and increased noise can result. Avoid placing any obstacles adjacent to the air outlet.
• If the air conditioner produces any abnormal sound, consult with your dealer.

Maintenance and inspection

• If the air conditioner is used throughout several seasons, the insides can get dirty, reducing the performance.
• Depending upon the conditions of usage, foul odors can be generated and drainage can deteriorate due to dust and dirt, etc.

Specifications

PEFY-P・NMAU-E4 series

Notes

1. Cooling/Heating capacity indicates th e maximum value at operation under the follow ing condition.
   • Cooling: Indoor:80°F (26.7°C) D.B./67°F (19.4°C) W.B. Outdoor: 95°F (35°C) D.B.
   • Heating: Indoor: 70°F (21.1°C) D.B. Outdoor: 47°F (8.3°C) D.B./43°F (6.1°C) W.B.
   • Pipe length: 7.5 m (24-9/16 ft) Height difference: 0m (0 ft)
2. The external static pressure is set to 0.20 in. WG (50 Pa) at factory shipment.
3. The operating noise is the data that was obtained in an anechoic room.

This product is designed and intended for use in the residential, commercial and light-industrial environment.

Please be sure to put the contact address/telephone number on this manual before handing it to the customer.

CONTACT

• HEAD O FFICE: TOK YO BLDG.,
• 2-7-3, MARUNOUCHI, CHIYODA-KU, TOK YO 100-8310, JAPAN

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