Mitsubishi TEK450MA Operation Manual
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Mitsubishi TEK450MA Operation Manual

Transport refrigeration unit
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OPERATION MANUAL
OPERATION MANUAL
MITSUBISHI TRANSPO
TEK450MA
TEK450SA
TEK350SA
TEK250SA
This operation manual is
intended to provide users
with a good knowledge to
use Mitsubishi Refrigeration
Unit safely.
Operate or service the
refrigeration unit only after
you have read this manual
and understand its
contents.
Ca
refully store this manual
in a xed place so that it is
immediately available for
your reference when you
need it.
Original Instructions
RT REFRIGERATION UNIT
TSJ012A269
A
YEAR:2024

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Summary of Contents for Mitsubishi TEK450MA

  • Page 1 TEK450MA TEK450SA TEK350SA TEK250SA This operation manual is intended to provide users with a good knowledge to use Mitsubishi Refrigeration Unit safely. Operate or service the refrigeration unit only after you have read this manual and understand its contents. refully store this manual...

  • Page 2: Important Information

    Thank you for your purchase of Mitsubishi Transport Refrigeration Unit. Purpose of use and application This Refrigeration Unit is intended to carry the cargo (with the exception of volatile, inflammable, hazardous and corrosive matters) on a transportation vehicle, keeping the inside container temperature at a certain degree.

  • Page 3: Operation Manual

    Operation manual ● This operation manual is prepared for people who speaks English. In case that person whose native language is not English handles this refrigeration unit, he or she must be instructed on safety by the customer. Furthermore, the warning labels described in their native language must be prepared and stuck on the proper places.

  • Page 4: Information On The Model

    Information on the model This operation manual describes how to use the following model. (1) 2-evaporator system for two refrigeration compartments TEK450MA (3) Standard system for single refrigeration compartment TEK450SA TEK350SA TEK250SA - III - - III -...

  • Page 5: Table Of Contents

    Contents Purpose of use and application --I Modification of refrigeration unit and specification change ---------- 19 Important information -------------I Power supply equipment ---------- 19 Operation manual ---------------- II Emergency measure ----------- 20 For disposal ----------------------- II Handling of warning labels ---- 22 Information on the model ------- III Prevention of start during Contents -------------------------- IV...
  • Page 6 8 Cautions for use --------- 64 Stopping the operation -------- 42 Suspending (sleep) the compartment When operating at a low inside operation (2-compartment model) - 43 container temperature for a long period of time: ----------------------- 64 Setting the temperature ------- 44 When stopping the refrigeration Setting the preset defrost interval unit for a long period of time: ------ 64...

  • Page 7: Function Of Refrigeration Unit

    1 Function of Refrigeration Unit This refrigeration unit has following functions. (1) Operation during vehicle engine stop This is the function to operate by battery power during vehicle stop for keeping cargo temperature. Refer to page 40 for how to switch the operation. (2) Switching function of commercial power supply This is the function to switch the operation automatically depending on whether the commercial power supply is connected or not.

  • Page 8: Name Of Each Part

    2 Name of each part Main parts (TEX06) (TEX09) (TEX11) • Layout could vary depending on vehicles, etc. Please check before use. Condensing unit Battery box Cabin controller A room evaporator unit Alternator B room evaporator unit AC commercial power connector Evaporator unit - 2 -...

  • Page 9: Condensing Unit

    2 Name of each part Condensing unit ■ Top view ■ Front view Condenser fan & motor Control box (power) Compressor Control box (DC) Condenser coil - 3 -...

  • Page 10: Evaporator Unit

    2 Name of each part Evaporator unit • TEX11CA-EVA2JE ■ Front view ■ Under view • TEX09CA-EVA2JE • TEX06CA-EVA2JE ■ Under view ■ Under view Inside of view “A” Evaporator outlet Evaporator fan motor Evaporator coil Expansion valve - 4 -...

  • Page 11: Alternator

    2 各部の名称 2 Name of each part オルタネータ Alternator ※仕様変更により形状が * Shapes may vary 　異なる場合があります。 depending on specification changes. 冷凍ユニットバッテリ・ACコンセント Battery box * Shapes may vary depending on ■ specification changes. ■上面視 Top view ■ ■正面視 Front view Battery Fuse box Battery terminal - 5 - - 00 -...

  • Page 12: Cabin Controller

    2 各部の名称 2 Name of each part キャビンコントローラ Cabin controller A Cooling B Heating Battery RUN/STOP MENU ° C ° C ° C ° C DEFROST Batt. OFF A setting B setting PRESET ■ 1-compartment model Battery Cooling ° C °...

  • Page 13: Lcd Display Area

    2 各部の名称 2 Name of each part LCD display area 9 13 10 14 A Cooling B Heating Battery ° C ° C ° C ° C A setting B setting Batt. OFF ■ 1-compartment model Battery Cooling ° C °...
  • Page 14 2 Name of each part Displays the operation modes. <Display contents> Cooling, Heating, Defrost, Sleep, Stop and Fan. * There is no display when Thermostat is OFF with evaporator fan motor OFF. Fan is displayed when Thermostat is OFF with evaporator fan motor ON.

  • Page 15: Protective Devices

    2 Name of each part Protective devices This refrigeration unit is provided with the following protective devices to ensure the safety of the operators. (1) Panel, Fan guard These devices prevent interference with the rotating section (fan motor) during operation. (2) Commercial power detection function This function gives a warning buzzer to prevent broken wire of the cable or electric shock if the drive engine is started in a state where the...

  • Page 16: Precaution For Safety

    3 Precaution for safety In this section, necessary safety precautions are provided to prevent accidents resulting in injuries or death, property damages and environment pollution. Read and understand contents of the cautions before starting to use this refrigeration unit. Signs on safety Signs and Symbols on safety in this operation manual and the warning labels call the attention of the people who handle this refrigeration unit.

  • Page 17: Precaution

    3 Precaution for safety Precaution Handling of high-voltage DANGER If a high-voltage cable or component is exposed, never touch it. • Otherwise, it may cause electric shock. To prevent electric shock, do not touch any high-voltage cable, connector, or high-voltage component (control box, etc.).
  • Page 18 3 Precaution for safety WARNING If a high-voltage cable or component is exposed, never touch it. • Otherwise, it may cause electric shock. To prevent electric shock, do not touch any high- voltage cable, connector, or high-voltage component (control box, etc.). Please maintain a safe distance from the vehicle in case a fire occurs from the refrigeration unit.

  • Page 19: General Precautions

    3 Precaution for safety General precautions DANGER Do not paint on cover panel. (This will make refrigeration unit out of warranty.) • Cracking occurs in panel, which cause a risk of falling down of panel while the vehicle is running. Never mistake the polarity of the battery cable.
  • Page 20 3 Precaution for safety WARNING Be sure to carry out the periodic inspections. • Otherwise, it may cause troubles of the refrigeration unit or accidents. Be sure to use a device that emits radio waves (on-vehicle radio device, etc.) within its setting range. •...

  • Page 21: During And After The Operation

    3 Precaution for safety During and after the operation CAUTION Do not touch the compressor, the refrigerant pipe and movable parts such a fan during operation or immediately after the operation. • Otherwise it may cause burns, as compressor and refrigerant pipe will get hot.

  • Page 22: Loading

    3 Precaution for safety CAUTION Do not wash the refrigeration unit with a steam washer or a high pressure washer. • Otherwise, it may cause a rupture due to pressure rise in the refrigeration unit or distortions of the condenser fin. Before performing the inspection or cleaning work, stop the refrigeration unit using the RUN/STOP switch, and vehicle switch key off disconnect the battery terminals...

  • Page 23: Handling Of Electric Equipment And Power Codes

    3 Precaution for safety Handling of electric equipment and power codes WARNING • Do not splash water on the electric equipment directly or wash it with water. • Do not touch the electric equipment or operate the switches with wet hands.

  • Page 24: Reinstallation Of Refrigeration Unit

    3 Precaution for safety WARNING • Surely protect the power socket with a cover when it is not used. When the cover is damaged, repair it immediately. • Otherwise, it may cause an electric shock or a fire due to the heat, breaking of wire and leaking of water, etc. CAUTION Do not start and stop the operation with pulling out or inserting the power supply breaker or power code.

  • Page 25: Modification Of Refrigeration Unit And Specification Change

    3 Precaution for safety Modification of refrigeration unit and specification change WARNING Do not modify the refrigeration unit or change the specification. • It may cause a serious accident if customer modify the refrigeration unit or change the specification by himself/herself. Do not use any refrigerant or refrigerating machine oil other than those specified.

  • Page 26: Emergency Measure

    3 Precaution for safety Emergency measure (1) Refrigerant When refrigerant got in your eye ● Wash your eye with lots of clean running water for more than 15 minutes immediately. Wash rear side of the eyelid as well. Then, consult a physician as soon as possible.
  • Page 27 3 Precaution for safety 3 Precaution for safety ● When swallowing compressor oil Do not throw up the oil by force and consult a physician as soon as possible. When inside the mouth is contaminated, wash it well with water. (When throwing up the oil by force, it easily gets into air passage and causes high fever if it gets into lung.

  • Page 28: Handling Of Warning Labels

    3 Precaution for safety Handling of warning labels Handling of warning labels (a) Important precautions are stated on the warning labels. Never operate Important pr ecautions ar e stated on the war ning labels. Never operate the refrigeration unit unless fully understanding the meanings of the the refrigeration unit unless fully understanding the meanings of the warning labels.
  • Page 29 3 Precaution for safety Evaporator unit ■ Bottom view TSJ011H113 - 23 -...

  • Page 30: Prevention Of Start During Inspection Work

    3 Precaution for safety Prevention of start during inspection work When several people are working simultaneously for inspection, it is necessary to protect them from getting injured by accidental start of operation. In such occasion, place a tag stating "WORKING" on the cabin controller . Clothing and protective equipment Wear proper clothing and protective equipment to prevent from getting injured.

  • Page 31: Initial Setting

    1 Aaaaaa 4 Initial setting 4 初期設定 Display and function of main menu 各モードの表示とはたらき If you press the “MENU” switch once on the “Normal display screen” which is displayed when the refrigeration unit is stopped or operating, the display 冷凍ユニット停止状態又は運転中の 「通常表示画面」 で 「メニュースイッチ」 を1回 changes to the “Main menu”...

  • Page 32: Language Setting Mode

    4 初期設定 4 Initial setting If you press “F4 (Select)” switch on each MAIN menu screen on previous page, the display changes to the following screens. Printer output setting mode Printer output Printout period 12Hr The temperature graph is printed in this mode. Temp range ±30℃...

  • Page 33: Display And Function Of Sub-Menu

    4 Initial setting Display and function of Sub-menu Display and function of Sub-menu On the “Sub-menu”, the screen changes in the following order at each push on “F2 ( ▲ )” or “F3 ( ▼ )” switch. In the following gure, “F2” switch changes sequence clockwise while “F3”...
  • Page 34 4 初期設定 4 Initial setting If “F4 (Select)” switch is pressed on each Sub-menu screen on previous page, the display changes to following screens. Calendar and clock setting mode Calendar and clock setting Jan 2022 00:00 Date, Month, Year and current time are set in this mode.
  • Page 35 4 初期設定 4 Initial setting LCD backlight setting mode LCD backlight setting ▲ Always ON LCD backlight is set in this mode. Light SW linked (☞ Page 37) ▼ Lit at key operation only(20sec) Back ▲ ▼ Select Controller sound setting mode Controller sound setting Whether the switch operating sound is turned on or off is set in this mode.
  • Page 36 4 初期設定 4 Initial setting Forced thermostat reset temp. diff. setting mode Forced thermostat reset temp. diff. setting Setting temperature difference from target 4.0℃ temperature to be used as forced thermostat Back ▲ ▼ restarting condition after thermostat OFF. (Setting option) 2~10°C which can be changed in the unit of 0.5°C.

  • Page 37: Setting The Calendar And Clock (Date, Month, Year)

    4 初期設定 4 Initial setting 時刻（年月日）設定方法 Setting the calendar and clock (Date, Month, Year) Calendar and clock setting RUN/STOP MENU Jan 2022 00:00 Back ▲ ▼ Next DEFROST PRESET ２ ・４・5・6・ 7 ・8 3・4・5・6・ 7 ・8・9 Press “MENU” switch. ⇒ The display changes to “Main menu”...
  • Page 38 4 初期設定 4 Initial setting Press “F4 (Next)” switch. Calendar and clock setting Feb 2022 00:00 ⇒ Press “F2 (▲)” or “F3 (▼)” switch to adjust at current time (Hour). Back ▲ ▼ Next NOTE ● Time is displayed in the 24-hour scale. If it is “7 PM”, set as “19:00”.

  • Page 39: Displaying The Maintenance Information

    4 初期設定 4 Initial setting メンテナンス情報表示方法 Displaying the maintenance information Maintenance information RUN/STOP MENU Unit operation time/2120Hr Back Next DEFROST PRESET Press “MENU” switch. ⇒ The display changes to the “Main menu” screen. Press “F2 (▲)” or “F3 (▼)” switch Main menu till the display changes to the ▲...
  • Page 40 4 Initial setting •If you press “F4 (Next)” switch, the display changes to each display item in the table below. Display item Unit operation time Generator operation time Standby operation time Discharge current integration - 34 -...

  • Page 41: Setting The Defrost Interval

    4 初期設定 4 Initial setting デフロスト間隔時間設定方法 Setting the defrost interval Current setting RUN/STOP MENU 3.0Hr Back ▲ ▼ DEFROST PRESET 2・4 3・5 Press “MENU” switch. ⇒ The display changes to “Main menu” screen. Press “F2 (▲)” or “F3 (▼)” switch Main menu till the display changes to ▲...

  • Page 42: Setting The Backup Operation Time

    4 初期設定 4 Initial setting バックアップ運転時間設定方法 Setting the backup operation time Backup operation time setting RUN/STOP MENU 30min Back ▲Bright ▼Dark DEFROST PRESET ２ ・3・4・5 3・4・6 Press “MENU” switch. ⇒ The display changes to “Main menu” screen. Press “F2 (▲)” or “F3 (▼)” switch Main menu till the display changes to ▲...

  • Page 43: Setting Lcd Backlight

    4 初期設定 4 Initial setting LCDバックライト設定方法 Setting LCD backlight LCD backlight setting RUN/STOP MENU Brightness light SW-OFF Back ▲Bright ▼Dark DEFROST PRESET ２ ・3・4・5・6 3・4・5・6・ 7 Press “MENU” switch. ⇒ The display changes to “Main menu” screen. Press “F2 (▲)” or “F3 (▼)” switch Main menu till the display changes to ▲...
  • Page 44 4 初期設定 4 Initial setting Press “F4 (Select)” switch. LCD backlight setting 【Light SW linked】 Brightness of light SW-OFF ⇒ Adjust the brightness of the LCD Back ▲Bright ▼Dark Next backlight, when the vehicle’s light is OFF, pressing “F2 (▲ Bright)”...

  • Page 45: Operation

    5 Operation WARNING Do not operate the refrigeration unit in the place where there is a risk of combustible gas leakage. • Otherwise, it may cause a fire. Do not touch the electric devices with wet hands. • Otherwise, it may cause an electric shock. Do not operate the cabin controller while driving the vehicle.

  • Page 46: Switching The Drive

    5 Operation Switching the drive The refrigeration unit switches between the vehicle engine drive and the commercial power drive by detecting automatically, at the start of operation, whether it is connected to the commercial power supply or not. Operating with the vehicle engine Make sure that the commercial power supply is not connected to the AC commercial power connector.

  • Page 47: Starting The Operation

    5 運転方法 5 Operation 運転方法 Starting the operation A Cooling B Heating Battery RUN/STOP MENU ° C ° C ° C ° C DEFROST A setting B setting Batt. OFF PRESET Press “RUN/STOP” switch. (The refrigeration unit is turned “ON”.) ⇒...

  • Page 48: Stopping The Operation

    5 Operation 停止方法 Stopping the operation A Cooling B Heating Battery RUN/STOP MENU ° C ° C ° C ° C DEFROST A setting B setting Batt. OFF PRESET Press “RUN/STOP” switch. (The refrigeration unit is turned “OFF”.) NOTE ● If, after stopping the motor, the vehicle drive engine is started in the state that the commercial power supply is connected, the buzzer sounds to remind to turn off the power supply.

  • Page 49: Suspending (Sleep) The Compartment Operation (2-Compartment Model)

    5 Operation 5 運転方法 A Cooling B Heating Battery RUN/STOP MENU ° C ° C ° C ° C DEFROST Batt. OFF A setting B setting PRESET Suspending (sleep) the compartment operation (2-compartment model) On the normal display screen (Right A Cooling B Heating Battery...

  • Page 50: Setting The Temperature

    5 運転方法 5 Operation 温度設定方法 Setting the temperature A Cooling B Heating Battery RUN/STOP MENU ° C ° C ° C ° C DEFROST A setting B setting Batt. OFF PRESET 2・3 Start the operation of refrigeration unit. (☞ Page 41) On the normal display screen A Cooling B Heating...

  • Page 51: Setting The Preset Defrost Interval And Set Point

    5 運転方法 5 Operation Setting the preset defrost interval and set point A Cooling B Heating Battery RUN/STOP MENU ° C ° C ° C ° C DEFROST A setting B setting Batt. OFF PRESET Start the refrigeration unit. (☞ Page 41) Press the “PRESET”...

  • Page 52: Changing The Registered Preset Defrost Interval And Set Point

    5 Operation RUN/STOP Cooling MENU ° C ° C DEFROST ▲ ▼ PRESET 3・5・6・8 3・4・5・6 Changing the registered preset defrost interval and set point Press the “MENU” switch when the refrigeration unit is stopped. ⇒ The cabin controller becomes activated and the display changes to the “Normal display screen”.
  • Page 53 5 Operation Press “F4 (Next)” switch. Set point ⇒ Registered preset of “Set point” ° C is displayed. Back ▲ ▼ [2-compartment model] Set point (Zone A) Set point of Zone A is displayed. ° C Also, press “F2” or “F3” switch to select Operate / Sleep for each zone.

  • Page 54: Manual Defrost Operation

    5 運転方法 5 Operation 手動デフロスト運転方法 Manual defrost operation A Cooling B Heating Battery RUN/STOP MENU ° C ° C ° C ° C DEFROST A setting B setting Batt. OFF PRESET Starting the manual defrost operation Press the “DEFROST” switch once during cooling operation. ⇒...

  • Page 55: Setting The On Timer

    5 運転方法 5 Operation ONタイマ設定方法 Setting the ON timer Set ON timer RUN/STOP MENU ON timer enable Back Enable Disable DEFROST PRESET ２ ・3・４・5・6・ 7 ・8 3・4・5・6・ 7 ・8・9 Press “MENU” switch. ⇒ The display changes to “Main menu” screen. Press “F2 (▲)”...
  • Page 56 5 運転方法 5 Operation Press “F4 (Next)” switch. Set ON timer 20:25 Starting operation ⇒ Press “F2 (▲)” or “F3 (▼)” switch, and set the time (Month) of Set Back ▲ ▼ Next ON timer. Press “F4 (Next)” switch. Set ON timer Oct 23:25 Starting operation ⇒...

  • Page 57: Setting The Off Timer

    5 運転方法 5 Operation OFFタイマ設定方法 Setting the OFF timer Set OFF timer RUN/STOP MENU OFF timer enable Back Enable Disable DEFROST PRESET ２ ・3・４・5・6・ 7 ・8 3・4・5・6・ 7 ・8・9 Press “MENU” switch. ⇒ The display changes to “Main menu” screen. Press “F2 (▲)”...
  • Page 58 5 運転方法 5 Operation Press “F4 (Next)” switch. Set OFF timer 20:25 Stopping operation ⇒ Press “F2 (▲)” or “F3 (▼)” switch, and set the time (Month) of Set Back ▲ ▼ Next OFF timer. Press “F4 (Next)” switch. Set OFF timer Oct 23:25 Stopping operation ⇒...

  • Page 59: Setting The Key Lock/Unlock

    5 Operation 5 運転方法 Setting the key lock/unlock A Cooling B Heating Battery RUN/STOP MENU ° C ° C ° C ° C DEFROST A setting B setting Batt. OFF PRESET NOTE ● Key lock setting disables switch operation except for the "RUN/STOP" switch. Setting the key lock Hold down “F1”...
  • Page 60 5 Operation 5 運転方法 A Cooling B Heating Battery RUN/STOP MENU ° C ° C ° C ° C DEFROST PRESET NOTE ● This section describes when “key unlock setting at restart” is OFF. ● If “key unlock setting at restart” is ON, the key lock is released when the refrigeration unit stops.

  • Page 61: Loading

    6 Loading 1 Aaaaaa Preparation before loading CAUTION Before loading, cool down or heat up inside of the container to the appropriate setting temperature for the transportation of cargoes. Cargoes must be cooled down or heated up to the designated temperature with other refrigeration device in advance.

  • Page 62: Loading And Unloading

    6 Loading 6 Loading Loading and unloading Loading procedure Stop the cooling operation. ( Refer to page 42) Load the cargoes in the container. Leave a space between the cargo and inner wall of the container as shown in the following figure in order to circulate cool air. More than 50 mm Evaporator Lower than supply air outlet Supply air outlet More than 30 mm...

  • Page 63: Unloading

    6 Loading 6 Loading Unloading Stop the cooling operation. ( Refer to page 42) Unload the cargoes. NOTE ● Frost forms and accumulates on the evaporator coil while the refrigeration unit is operated during loading or unloading. ● Since the inside container temperature rises (or falls during cold winter) while the door is kept opened, load or unload as quickly as possible.

  • Page 64: Inspection

    7 Inspection Precautions for inspection Always carry out the following inspections before the operation to prevent any damages of the refrigeration unit before happening. WARNING Do not perform the inspection in the place where the combustible gas leakage may happen. •...
  • Page 65 7 Inspection CAUTION CAUTION Do not start maintenance without more than 5 minutes after stopping operation. • Refrigerant pipes are dangerously hot. There is risk of burn if touched carelessly. Before performing the inspection or cleaning work, stop the refrigeration unit using the RUN/STOP switch, vehicle switch key off and disconnect the battery terminals and the plug of the power cord.

  • Page 66: Daily Inspection

    7 Inspection 7 Inspection Daily inspection Before using the refrigeration unit, the customer should perform the daily inspection. Inspection of condenser coil Check the coil for fouling with dust. When the coil is fouled, wash it with a soft brush and water. NOTE ●...

  • Page 67: Periodic Inspection

    7 Inspection 7 Inspection Periodic inspection Please ask your nearest dealer to perform periodic inspection to ensure to use the refrigeration unit in the best condition all the time. Periodic inspection consists of the following items. Inspection at commissioning Monthly inspection Inspection at every 6 months Check the contents of inspection with the check sheet submitted after the periodic inspection.

  • Page 68: Periodic Inspection Check Sheet

    7 Inspection Periodic inspection check sheet Customer's Customer signature Serial No. Delivery date Condensing unit Body Inspection interval manufacturer Evaporator unit A Inspection date Evaporator unit B Model Refrigeration Inspection company Vehicle unit installation Serial No. company Inspector Inspection items Inspection result Remarks Inspection for seal sections of body where refrigeration unit...

  • Page 69: Refrigerant And Refrigerating Machine Oil

    7 Inspection Refrigerant and refrigerating machine oil Kind/Brand Refrigerant R452A Refrigerating machine oil Idemitsu Kosan Co., Ltd. DAPHNE HERMETIC OIL FV685 Power supply system (50Hz) Specification of power supply Switch Capacity of Molded-case circuit breaker Voltage Voltage drop Interphase power supply Rated capacity fluctuation at start-up...

  • Page 70: Cautions For Use

    8 Cautions for use When operating at a low inside container temperature for a long period of time: If the refrigeration unit is operated for a long period time with the inside container temperature below 10°C, ice will grow on the inside refrigeration unit, etc.

  • Page 71: For Emergency

    9 For emergency 9 For emergency 4 初期設定 Alarm display Alarm display ● When any trouble occurs, the warning icon ●If any error occurs, the abnor- lights (backlight blinks) or blinks. Abnormal display mal display lights or blinks Alarm code Alarm content ●...

  • Page 72: Countermeasures

    9 For emergency Countermeasures Refer to "List of alarm codes" for the contents of each alarm code and its countermeasure. ( Refer to pages 67 to 68) CAUTION Surely follow the instructions of this operation manual for the countermeasures of the troubles. •...

  • Page 73: List Of Alarm Codes

    9 For emergency List of alarm codes Alarm Alarm Unit Trouble Countermeasures Code Lamp Condition Evaporator fan motor fuse in the compartment A (F11) or Evaporator fan motor E001 compartment B (F12) has blown. Unit stops. fuse break (Zone X) Ask a dealer for inspection.
  • Page 74 9 For emergency Alarm Alarm Unit Trouble Countermeasures Code Lamp Condition THD sensor failure Supply air temperature sensor A or B is disconnected or Unit operation E252 Blinking (Zone X) shorted. Ask a dealer for inspection. continues. Ambient air temperature sensor is disconnected or Unit operation E256 ATS sensor failure...

This manual is also suitable for:

Tek450saTek350saTek250sa

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