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Safety precautions

• Read the following safety precautions before using the controller.

• Observe these precautions carefully to ensure safety.

• After reading this manual, provide this manual to end user for future reference.

• Keep this manual for future reference and refer to it as necessary. This manual should be made 

available to those who repair or relocate the controller. Make sure that the manual is forwarded to 

future end users.

 

WARNING

 

CAUTION

 

WARNING

 WARNING

Indicates a risk of death or serious injury if you misuse the PAC-YT52CRA.

 CAUTION

Indicates a risk of serious injury or structural damage if you misuse the 

PAC-YT52CRA.

General precautions

Precautions for moving or repairing the controller

Do not install the unit in a place where large amounts of 

oil, steam, organic solvents, or corrosive gases, such 

as sulfuric gas, are present or where acidic/alkaline 

solutions or sprays are used frequently. These 

substances can compromise the performance of the 

unit or cause certain components of the unit to corrode, 

which can result in electric shock, malfunctions, 

smoke, or fire.

To reduce the risk of shorting, current leakage, electric 

shock, malfunctions, smoke, or fire, do not wash the 

controller with water or any other liquid.

To reduce the risk of electric shock, malfunctions, 

smoke or fire, do not operate the switches/buttons or 

touch other electrical parts with wet hands.
When alcohol sterilization is performed, ventilate the 

air to remove the gas.

To reduce the risk of injury or electric shock, stop the 

operation and switch off the power supply before 

cleaning, maintaining, or inspecting the controller.

To reduce the risk of injury or electric shock, before 

spraying a chemical around the controller, stop the 

operation and cover the controller.

If any abnormality (e.g., burning smell) is noticed, stop 

the operation, turn off the power switch, and consult 

your dealer. Continuing the operation may result in 

electric shock, malfunctions, or fire.

Properly install all required covers to keep moisture 

and dust out of the controller. Dust accumulation and 

water can cause electric shock, smoke, or fire.

To reduce the risk of damage to the controller, do not 

directly spray insecticide or other flammable sprays on 

the controller.

To reduce the risk of electric shock or malfunctions, do 

not touch the touch panel, switches, or buttons with a 

pointy or sharp object.

To reduce the risk of injury and electric shock, avoid 

contact with sharp edges of certain parts.
To reduce the risk of injury, wear protective gear when 

working on the controller.

Consult your dealer for the proper disposal of the 

controller.

The controller should be repaired or moved only by 

qualified personnel. 

Do not disassemble or modify the controller.

Improper installation or repair may cause injury, electric 

shock, or fire.

WT06591X01.book  Page 2  Tuesday, April 17, 2012  3:29 PM

Summary of Contents for PAC-YT52CRA

Page 1: ...n operation Indicates settings that can be changed only while the units are stopped Indicates functions that are not available when the buttons are locked or the system is centrally controlled Prior to use thoroughly read the instructions in this manual to use the product correctly Retain for future reference Make sure that this manual and Installation Manual are passed on to any future users To e...

Page 2: ... fire do not operate the switches buttons or touch other electrical parts with wet hands When alcohol sterilization is performed ventilate the air to remove the gas To reduce the risk of injury or electric shock stop the operation and switch off the power supply before cleaning maintaining or inspecting the controller To reduce the risk of injury or electric shock before spraying a chemical around...

Page 3: ...ow dust to accumulate on the circuit board To avoid damage to the unit use appropriate tools to install inspect or repair the unit To avoid discoloration do not use benzene thinner or chemical rag to clean the controller To clean the controller wipe with a soft cloth soaked in water with mild detergent wipe off the detergent with a wet cloth and wipe off water with a dry cloth ...

Page 4: ...n ON OFF button See Page 7 button See Page 8 To set the functions that are not available on this controller PAC YT52CRA such as Louver use MA remote controller or the centralized controller The lamp will light up in green when turned on and blink during startup and when an error occurs Pressing this button starts and stops the operation ...

Page 5: ...ss blinks Error code blinks Error code blinks Error code blinks icon appears while the unit is operated in the energy save mode All icons are displayed for explanation icon appears when Operation lock setting is effective See page 10 icon appears when indoor unit functions are set up Refer to the Installation Manual Fan speed icon Vane icon icon appears when the power is on Indoor temperature Oper...

Page 6: ... the unit is in operation AUTO dual set point mode In AUTO dual set point mode the preset temperatures can be set for cooling and heating and operation can be switched automatically between cooling and heating depending on the room temperature The preset temperatures for cooling and heating set in AUTO dual set point mode will be reflected to the temperature setting for COOL DRYING and HEAT modes ...

Page 7: ... temperature cooling heating display blinks pressing the button increases the preset temperatures for both cooling and heating and pressing the button decreases the preset temperatures for both cooling and heating When the button is pressed only the cooling preset temperature display blinks While the cooling preset temperature display blinks pressing the button increases the cooling preset tempera...

Page 8: ...the button will change the fan speed in the following order The settable fan speed varies depending on the indoor unit model to be connected If the unit has no fan setting function the fan speed cannot be set In this case the fan icon blinks when the button is pressed Pressing the button will switch the vane directions The settable vane direction varies depending on the indoor unit model to be con...

Page 9: ...OL DRYING mode The preset temperature range for COOL DRYING and AUTO dual set point modes can be changed C Temperature range restriction for HEAT mode The preset temperature range for HEAT and AUTO dual set point modes can be changed D Temperature range restriction for AUTO single set point mode The preset temperature range for AUTO single set point mode can be changed 4 Press the button to switch...

Page 10: ...y will blink The temperature range on this controller PAC YT52CRA connected to the indoor units that have the temperature range restriction function can be restricted also from the centralized controller that has the same function This function can lock all buttons Locking the operations While the operation lock is disabled icon is unlit press and hold the button for three seconds or longer to ena...

Page 11: ... seconds or longer to complete the setting 1 Press the button to stop the air conditioning unit 2 Press the and buttons simultaneously for three seconds or longer to change the backlight brightness The factory setting is bright Repeat step 2 above to switch the settings A B and C The setting will automatically turn off if step 2 is not performed for a certain period of time Backlight brightness se...

Page 12: ...tions Product size 70 W 120 H 14 5 D mm 2 3 4 4 3 4 9 16 in not including the protruding part Net weight 0 1 kg 1 4 lb Rated power supply voltage 12 VDC supplied from indoor units Power consumption 0 3 W Usage environment Temperature 0 40ºC 32 104ºF Humidity 30 90 RH with no dew condensation Material PC ABS HEAD OFFICE TOKYO BLDG 2 7 3 MARUNOUCHI CHIYODA KU TOKYO 100 8310 JAPAN Authorized represen...

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