Mitsubishi Heavy Industries KXZ Series Technical Manual
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Mitsubishi Heavy Industries KXZ Series Technical Manual

Vrf inverter multi-system air-conditioners
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Manual No.'17•KX-T-254
TECHNICAL MANUAL
VRF INVERTER MULTI-SYSTEM AIR-CONDITIONERS
(INDOOR UNIT)
KXZ series
Ceiling cassete - 4way type
FDT28KXZE1
FDT36KXZE1
FDT45KXZE1
FDT56KXZE1
FDT71KXZE1
FDT90KXZE1
FDT112KXZE1
FDT140KXZE1
FDT160KXZE1
Note:
•
(1) Regarding the outdoor unit KXZ series, refer to the No.'14
KX-T-223, No.'15
KX-T-227 and
•
•
No.'16
KX-DB-225D.
•

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Summary of Contents for Mitsubishi Heavy Industries KXZ Series

  • Page 1 (INDOOR UNIT) KXZ series Ceiling cassete - 4way type FDT28KXZE1 FDT36KXZE1 FDT45KXZE1 FDT56KXZE1 FDT71KXZE1 FDT90KXZE1 FDT112KXZE1 FDT140KXZE1 FDT160KXZE1 Note: • (1) Regarding the outdoor unit KXZ series, refer to the No.'14 KX-T-223, No.'15 KX-T-227 and • • No.'16 KX-DB-225D. •...

  • Page 2: Table Of Contents

    10.3 Motion sensor kit (LB-T-5W-E) ................120 ■ How to read the model name Example: FDT 28 Series No. Application power source...See the specifications Multi KXZ series Nominal capacity (Nominal cooling capacity : 2.8kW) 〕 Model name〔 Ceiling cassette - 4way type – –...

  • Page 3: Specifications

    '17 • KX-T-254 1. SPECIFICATIONS Models FDT28KXZE1, 36KXZE1, 45KXZE1, 56KXZE1, 71KXZE1 PJF000Z416 – –...
  • Page 4 '17 • KX-T-254 Models FDT90KXZE1, 112KXZE1, 140KXZE1, 160KXZE1 PJF000Z416 – –...

  • Page 5: Exterior Dimensions

    '17 • KX-T-254 2. EXTERIOR DIMENSIONS Indoor unit Models FDT28KXZE1, 36KXZE1, 45KXZE1, 56KXZE1, 71KXZE1 PJF000Z417 – –...
  • Page 6 '17 • KX-T-254 Models FDT90KXZE1, 112KXZE1, 140KXZE1, 160KXZE1 PJF000Z418 – –...

  • Page 7: Remote Control (Option Parts)

    '17 • KX-T-254 Remote control (Option parts) Wired remote control Model RC-EX3 Installation space Installation space Exterior appearance Exterior appearance Pearl white Pearl white (Munsell color) (Munsell color) (N8.5) near equivalent (N8.5) near equivalent R/C cable：0.3mm × 2 cores × 2 core RoHS RoHS Adapted to...
  • Page 8 '17 • KX-T-254 Model RC-E5 Wiring outlet Cut off the upper thin part of remote control lower case with a nipper or knife, Exposed mounting and grind burrs with a file etc. In case of pulling out In case of pulling out from upper left from center 0.3mm...
  • Page 9 '17 • KX-T-254 Wireless remote control (RCN-E2) Unit: mm – –...

  • Page 10: Electrical Wiring

    '17 • KX-T-254 3. ELECTRICAL WIRING All models PJF000Z421 – –...

  • Page 11: Noise Level

    '17 • KX-T-254 4. NOISE LEVEL Note (1) The data are based on the following conditions. Ambient air tempetature: Indoor unit 27˚C DB, 19˚C WB. Outdoor unit 35˚C DB (2) The data in the chart are measuted in an unechonic room. (3) The noise levels measured in the field are usually higher than the data because of reflection.

  • Page 12: Temperature And Velocity Distribution

    '17 • KX-T-254 5. TEMPERATURE AND VELOCITY DISTRIBUTION Indoor temperature Cooling 27°CDB/19°CWB, Heating 20°CDB 〔 Note 〕 These figures represent the typical main range of temperature and velocity distribution at the center of air outlet within the published conditions. In the actual installation, they may differ from the typical figures under the influence of air temperature conditions, ceiling height, operation conditions and obstacles. Models FDT28KXZE1, 36KXZE1, 45KXZE1 ：...
  • Page 13 '17 • KX-T-254 Model FDT56KXZE1 ： P-Hi ： P-Hi Temperature distribution Velocity distribution ： P-Hi Temperature distribution Velocity distribution ISD16448 – –...
  • Page 14 '17 • KX-T-254 Model FDT71KXZE1 ： P-Hi ： P-Hi Temperature distribution Velocity distribution ： P-Hi Temperature distribution Velocity distribution ISD16448 – –...
  • Page 15 '17 • KX-T-254 Models FDT90KXZE1, 112KXZE1, 140KXZE1, 160KXZE1 ： P-Hi ： P-Hi Temperature distribution Velocity distribution ： P-Hi Temperature distribution Velocity distribution ISD16448 – –...

  • Page 16: Capacity Tables

    '17 • KX-T-254 6. CAPACITY TABLES Caution: In case that the cooling operation during low outdoor air temperature below -5°C is expected, install the outdoor unit where it is not influenced by natural wind. Otherwise protection control by low pressure will be activated much more frequently and it will cause insufficient capacity or breakdown of the compressor in worst case.
  • Page 17 '17 • KX-T-254 FDT36KXZE1 (kW) (kW) Indoor air temperature Outdoor temp. Indoor temp. Outdoor 21 ℃DB 23 ℃DB 26 ℃DB 27 ℃DB 28 ℃DB 31 ℃DB 33 ℃DB Air flow 14 ℃WB 16 ℃WB 18 ℃WB 19 ℃WB 20 ℃WB 22 ℃WB 24 ℃WB 16 ℃DB...
  • Page 18 '17 • KX-T-254 FDT45KXZE1 (kW) (kW) Indoor air temperature Outdoor temp. Indoor temp. Outdoor 21 ℃DB 23 ℃DB 26 ℃DB 27 ℃DB 28 ℃DB 31 ℃DB 33 ℃DB Air flow 14 ℃WB 16 ℃WB 18 ℃WB 19 ℃WB 20 ℃WB 22 ℃WB 24 ℃WB 16 ℃DB...
  • Page 19 '17 • KX-T-254 FDT56KXZE1 (kW) (kW) Indoor air temperature Outdoor temp. Indoor temp. Outdoor 21 ℃DB 23 ℃DB 26 ℃DB 27 ℃DB 28 ℃DB 31 ℃DB 33 ℃DB Air flow 14 ℃WB 16 ℃WB 18 ℃WB 19 ℃WB 20 ℃WB 22 ℃WB 24 ℃WB 16 ℃DB...
  • Page 20 '17 • KX-T-254 FDT71KXZE1 (kW) (kW) Indoor air temperature Outdoor temp. Indoor temp. Outdoor 21 ℃DB 23 ℃DB 26 ℃DB 27 ℃DB 28 ℃DB 31 ℃DB 33 ℃DB Air flow 14 ℃WB 16 ℃WB 18 ℃WB 19 ℃WB 20 ℃WB 22 ℃WB 24 ℃WB 16 ℃DB...
  • Page 21 '17 • KX-T-254 FDT90KXZE1 (kW) (kW) Indoor air temperature Outdoor temp. Indoor temp. Outdoor 21 ℃DB 23 ℃DB 26 ℃DB 27 ℃DB 28 ℃DB 31 ℃DB 33 ℃DB Air flow 14 ℃WB 16 ℃WB 18 ℃WB 19 ℃WB 20 ℃WB 22 ℃WB 24 ℃WB 16 ℃DB...
  • Page 22 '17 • KX-T-254 FDT112KXZE1 (kW) (kW) Indoor air temperature Outdoor temp. Indoor temp. Outdoor 21 ℃DB 23 ℃DB 26 ℃DB 27 ℃DB 28 ℃DB 31 ℃DB 33 ℃DB Air flow 14 ℃WB 16 ℃WB 18 ℃WB 19 ℃WB 20 ℃WB 22 ℃WB 24 ℃WB 16 ℃DB...
  • Page 23 '17 • KX-T-254 FDT140KXZE1 (kW) (kW) Indoor air temperature Outdoor temp. Indoor temp. Outdoor 21 ℃DB 23 ℃DB 26 ℃DB 27 ℃DB 28 ℃DB 31 ℃DB 33 ℃DB Air flow 14 ℃WB 16 ℃WB 18 ℃WB 19 ℃WB 20 ℃WB 22 ℃WB 24 ℃WB 16 ℃DB...
  • Page 24 '17 • KX-T-254 FDT160KXZE1 (kW) (kW) Indoor air temperature Outdoor temp. Indoor temp. Outdoor 21 ℃DB 23 ℃DB 26 ℃DB 27 ℃DB 28 ℃DB 31 ℃DB 33 ℃DB Air flow 14 ℃WB 16 ℃WB 18 ℃WB 19 ℃WB 20 ℃WB 22 ℃WB 24 ℃WB 16 ℃DB...

  • Page 25: Application Data

    '17 • KX-T-254 7. APPLICATION DATA 7.1 Installation of indoor unit PJF012D029 201612 This manual is for the installation of the indoor unit. For electrical wiring work (Indoor unit), refer to page 30. For remote control installation, refer to page CAUTION 34.
  • Page 26 '17 • KX-T-254 201612 ①Before installation ③Preparation before installation ●Install correctly according to the installation manual. ●If suspension bolt becomes longer, do reinforcement of earthquake resistant. ●Confirm the following points: 　○For grid ceiling 　○Unit type/Power source specification ○Pipes/Wires/Small parts ○Accessory items 　　When suspension bolt length is over 500mm, or the gap between the ceiling and roof is over 700mm, apply earthquake resistant brace to the bolt.
  • Page 27 '17 • KX-T-254 ⑤Refrigerant pipe (continued) ④Installation of indoor unit (continued) Protection of the indoor unit Caution: Refrigerating machine oil should not be applied to the threads of union or external surface of flare. It ● If it is not possible to install the panel for a while or if attaching the ceiling board after is because, even if the same tightening torque is applied, the oil is likely to decrease the slide friction installing the indoor unit, protect the indoor unit by using upper carton.
  • Page 28 '17 • KX-T-254 ⑦Wiring-out position and wiring connection (continued) ⑥Drain pipe (continued) As wide as possible Indoor power ●When sharing a drain pipe for more than 1 Wiring between indoor Single Split (PAC) series VRF (KX) series source line (about100mm) and outdoor units Band Band...
  • Page 29 '17 • KX-T-254 PJF012D037 PJF012D037 • Panel installation Read this manual together with the indoor unit’s installation manual. Read this manual together with the indoor unit’s installation manual. 5 Orientation of the panel installation 5 Orientation of the panel installation 7 Ele 7 Ele Take note that there is an orientation to install the panel.
  • Page 30 '17 • KX-T-254 D037 7 Electrical wiring Installing the inlet grille To attach the inlet grille, follow the procedure described in in the reverse order. The wiring work varies depending on the panel type. Select the wiring work appropriate for the panel type. 3 Removing the inlet grille The connection positions of the indoor unit are as shown below irrespective of the panel type.

  • Page 31: Electric Wiring Work Instruction

    '17 • KX-T-254 7.2 Electric wiring work instruction PSC012D087 PSC012D087 Electrical wiring work must be performed by an electrician qualified by a local power provider according to Electrical wiring work must be performed by an electrician qualified by a local power provider according to the electrical installation technical standards and interior wiring regulations applicable to the installation site.
  • Page 32 '17 • KX-T-254 AIR CON NO. Address setting ② ③④ Operation and confirmation from remote control Address setting is done by (1) Manual address setting or (2) Automatic address setting. AIR CON NO. Operation from the eco touch remote Operation from the standard remote control Item In the case of (2) "Automatic address setting", it is possible to change address setting by wired control (RC-EX3)
  • Page 33 '17 • KX-T-254 ⑥ Operation and setting from remote control A : Refer to the instruction manual for RC-EX series ○：Nearly same function setting and operations are possible. B : Refer to the installation manual for RC-EX series △：Similar function setting and opperations are possible. C : Loading a utility software vie Internet RC-E4 Setting ＆...
  • Page 34 '17 • KX-T-254 ⑥ Operation and setting from remote control (continued) RC-E4 Setting ＆ display item Description RC-EX3 RC-E5 2 Administrator settings R/C display setting Register [Room name] [Name of I/U] Display [Indoor temp. display] or not. △ [Administrator password] Display [Error code display] or not.

  • Page 35: Installation Of Wired Remote Control (Option Parts)

    '17 • KX-T-254 7.3 Installation of wired remote control (Option parts) (1) Model RC-EX3 PJZ012A131 　 1. Safety precautions ● Please read this manual carefully before starting installation work to install the unit properly. Every one of the followings is important information to be observed strictly. Failure to follow these instructions properly may result in serious WARNING consequences such as death, severe injury, etc.
  • Page 36 '17 • KX-T-254 　 WARNING Do not install the unit in appropriate environment or where inflammable gas could generate, flow in, accumulate or leak. If the unit is used at places where air contains dense oil mist, steam, organic solvent vapor, corrosive gas (ammonium, sulfuric compound, acid, etc) or where acidic or alkaline solution, special spray, etc.
  • Page 37 '17 • KX-T-254 　 CAUTION Do not install the remote control at following places. (1) It could cause break-down or deformation of remote control. ・ Where it is exposed to direct sunlight ・ Where the ambient temperature becomes 0 °C or below, or 40 °C or above ・...
  • Page 38 '17 • KX-T-254 　 2 . Accessories & Prepare on site Following parts are provided. Accessories R/C main unit, wood screw (ø3.5 x 16) 2 pcs, Quick reference Following parts are arranged at site. Prepare them according to the respective installation procedures. When the cable length is longer than 100 m, Item name Q’ty...
  • Page 39 '17 • KX-T-254 　 4 . Installation procedure Perform installation and wiring work for the remote control according to the PCB side (Viewed from rear) following procedure. Dimensions (Viewed from front) 固定穴 Fixing holes センサー 端子 Sensor USB port Terminal block To remove the upper case from the bottom cases of R/C ·...
  • Page 40 ブッ シ ング パテで シール する こ と '17 • KX-T-254 　 リ モコ ン配線 ③ Connect wires from X and Y terminals of R/C to X and Y terminals of indoor unit. R/C wires (X, Y) have no polarity. Fix wires such that the wires will run around the terminal screws on the top case of R/C.
  • Page 41 '17 • KX-T-254 　 5 . Main/Sub setting when more than one remote control are used ○: operable ×: not operable Up to two units of R/C can be used R/C operations Main Sub R/C operations Main Sub Service Installation Installation date ○...

  • Page 42: Model Rc-E5

    '17 • KX-T-254 PJA012D730 (2) Model RC-E5 Installation manual for wired remote controller Connect the remote cont terminal block. Connect the terminal of r Read together with indoor unit's installation manual. with the terminal of indoo (X and Y are no polarity) WARNING Wiring route is as shown Fasten the wiring to the terminal securely and hold the cable securely so as not to apply unexpected stress on the...
  • Page 43 '17 • KX-T-254 ote controller Connect the remote control cord to the Sheath Sheath The range of temperature settin terminal block. When shipped, the range of set te Connect the terminal of remote control (X,Y) Upper case Upper case Board Board Heating : 16 ~ 30˚C (55 ~ 86˚F with the terminal of indoor unit (X,Y).
  • Page 44 '17 • KX-T-254 PJA012D730 Sheath The range of temperature setting When shipped, the range of set temperature differs depending on the operation mode as below. Upper case Board Heating : 16-30˚C (55-86˚F) Except heating (cooling, fan, dry, automatic) : 18-30˚C (62-86˚F) Upper limit and lower limit of set temperature can be changed with remote control.
  • Page 45 '17 • KX-T-254 The functional setting The initial function setting for typical using is performed automatically by the indoor unit connected, when remote Note 1: The initial setting marked “ ” is decided by connected indoor and outdoor unit, and is automatically defined as following table. control and indoor unit are connected.
  • Page 46 '17 • KX-T-254 PJA012D730 omatically defined as following table. Operation message How to set function ndoor unit. Function description: Function No. Stop air-conditioner and press (SET) (MODE) setting description: " mode buttons at the same time for over three seconds, and the ep of air flow setting "FUNCTION SET "...

  • Page 47: Outline Of Operation Control By Mycrocomputer

    '16 • PAC-T-251 '17 • KX-T-254 1.10 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER 8. OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER 1.10.1 Remote control 8.1 Remote control (Option parts) Wired remote control Wired remote control Model RC-EX3 Model RC-EX3 ⑤ LCD (With backlight) ③...
  • Page 48 '16 • PAC-T-251 '17 • KX-T-254 Wired remote control Model RC-E5 The figure below shows the remote control with the cover opened. Note that all the items that may be displayed in the liquid crystal display area are shown in the figure for the sake of explanation Characters displayed with dots in the liquid crystal display area are abbreviated.
  • Page 49 '16 • PAC-T-251 '17 • KX-T-254 Wireless remote control Indication section ① OPERATION MODE display Indicates selected operation mode. SET TEMP display Indicates set temperature. SLEEP TIMER time display Indicates the amount of time remaining on the sleep timer. ② Indoor function setting Indicates the setting number of the indoor function setting.

  • Page 50: Operation Control Function By The Wired Remote Control

    '16 • PAC-T-251 '17 • KX-T-254 1.10.2 Operation control function by the wired remote control 8.2 Operation control function by the wired remote control ●Model RC-EX3 (1) Switching sequence of the operation mode switches of remote control (a) Tap the change operation mode button on the TOP screen. (b) When the change operation mode screen is displayed, tap the button of desired mode.
  • Page 51 '16 • PAC-T-251 '17 • KX-T-254 ●Content memorized with the power failure compensation are as follows. Note(1) Items (f) and (g) are memorized regardless whether the power failure compensation is effective or not while the setting of silent mode is cancelled regardless whether the power failure compensation is effective or not.
  • Page 52 '16 • PAC-T-251 '17 • KX-T-254 Model RC-E5 Switching sequence of the operation mode switches of remote control COOL HEAT AUTO CPU reset This functions when “CHECK” and “ESP” buttons on the remote control are pressed simultaneously. Operation is same as that of the power source reset.

  • Page 53: Operation Control Function By The Indoor Control

    '16 • PAC-T-251 '17 • KX-T-254 11.3 Operation control function by the indoor control 8.3 Operation control function by the indoor control (1) Auto operation (Heat recovery 3-pipe combination systems only) (a) If “Auto” mode is selected by the remote control, the heating and the cooling are automatically switched according to the difference between outdoor air temperature and setting temperature and the difference between setting temperature and return air temperature.
  • Page 54 '16 • PAC-T-251 '17 • KX-T-254 (ii) Regardless of the setting temperature, the cooling or heating operation mode is judged according to the "Judgment based on Room temperature/Cooling or Heating and Outdoor temperature/Cooling or Heating". 1) In case of "Room temperature/Cooling < Indoor return air temperature" and "Outdoor temperature/Cooling < Outdoor air tem perature"...
  • Page 55 '16 • PAC-T-251 '17 • KX-T-254 Timer operation (a) RC-EX3 Sleep timer Set the time from the start to stop of operation. The time can be selected in the range from 30 to 240 minutes (in the unit of 10-minute). Note (1) Enable the “Sleep timer”...
  • Page 56 '16 • PAC-T-251 '17 • KX-T-254 Hot start (Cold draft prevention at heating) (a) Operating conditions When either one of following conditions is satisfied, the hot start control is performed. (i) From stop to heating operation (ii) From cooling to heating operation (iii) From heating thermostat OFF to ON (iv) After completing the defrost operation (only on units with thermostat ON) Contents of operation...
  • Page 57 '16 • PAC-T-251 '17 • KX-T-254 Auto swing control Note Even if [Auto Swing] is selected, the louver position with anti draft function is fixed to horizontal position. (a) RC-EX3 Louver control o operate the swing louver when the air-conditioner is operating, press the “Direction” button on the TOP screen of remote control.
  • Page 58 '16 • PAC-T-251 '17 • KX-T-254 Thermostat operation (a) Cooling (i) Thermostat is operated with the room temperature control. (ii) Thermostat is turned ON or OFF relative to the set room temperature as shown below. Thermostat ON Temperature drop Thermostat OFF Temperature rise Set room temperature (iii) Thermostat is turned ON when the room temperature is in the range of -1 <...
  • Page 59 '16 • PAC-T-251 '16 • PAC-T-251 '17 • KX-T-254 (d) Fan control during cooling thermostat OFF (d) Fan control during cooling thermostat OFF (i) Following fan controls during the cooling thermostat OFF can be selected with the indoor function setting of the wired (i) Following fan controls during the cooling thermostat OFF can be selected with the indoor function setting of the wired remote control.
  • Page 60 '17 • KX-T-254 (11) Drain pump control This control is operated when the inverter frequency is other than 0 Hz during the cooling operation and automatic cooling and dehumidifying operations. (b) Drain pump ON condition continues for 5 minutes even when it enters the OFF range according to (i) above after turning the drain pump ON, and then stops.
  • Page 61 (14) Cooling, dehumidifying frost protection To prevent frosting during cooling mode or dehumidifying mode operation, the of compressor speed is reduced if '17 • KX-T-254 the indoor heat exchanger temperature (detected with Thi-R) drops to 1.0 °C or lower at 4 minutes after the start of compressor operation.
  • Page 62 '17 • KX-T-254 (b) Display to the remote control (i) Central or each remote control basis, heating preparation: the smallest unit No. among the operating units in the remote mode (or the center mode unless the remote mode is available) is displayed. (ii) Inspection display, filter sign: Any of unit that starts initially is displayed.
  • Page 63 Blue Blue '17 • KX-T-254 ■ Priority order for combinations of CnT and CnTA input. ■ Priority order for combinations of CnT and CnTA input. CnTA CnTA ① Operation ② Operation ③ Operation ④ Operation ⑤ Cooling/heating ⑥ Cooling/heating ⑦ Emergency ①...
  • Page 64 '17 • KX-T-254 (i) In case of “Level input” setting (Factory default) Input signal to CnT-6 or CnTA is OFF→ON …… unit ON Input signal to CnT-6 or CnTA is ON→OFF …… unit OFF Operation is not inverted. CnT-6 or CnTA input CnT-6 or CnTA input Unit A Unit A...
  • Page 65 ① When card key switch is ON (Operation permission), the unit starts operation in conjunction with ON signal. and also start/stop operation of the unit from the wired remote control becomes available. ② When card key switch is OFF (Operation prohibition), the unit stops operation in conjunction with OFF signal, and '17 •...
  • Page 66 Operation Operation permission permission Operation permission/ Operation( ) prohibition zone permission ( ※ ) Operation prohibition zone is determined by the OR judgment between CnT operation prohibition zone and CnTA '16 • PAC-T-251 '17 • KX-T-254 operation prohibition zone. (21) Temporary stop input In case of CnT ③...
  • Page 67 '16 • PAC-T-251 '17 • KX-T-254 (c) If the cooling/heating selection signal is given by the external input, the operation mode is transmitted to the remote control. ■ Selection of cooling/heating external input function External input External input Operation selection method External input (CnT or CnTA)
  • Page 68 '17 • KX-T-254 (26) Branching control (Heat recovery 3-pipe combination systems only) (a) New control with new branching control (New Superlink control) Control by means of CnT2 (The compressor does not stop at the switching of heating/cooling.) CnT outputs – XR2: Heating output, XR3: Compressor ON thermostat output (b) Old control with new branching control (Old Superlink control) Control by means of CnT2 (The compressor stops at the switching of heating/cooling.) (c) Control of the branching control when the heating/cooling is switched with the CnT2 output...
  • Page 69 '16 • PAC-T-251 '17 • KX-T-254 (29) Energy-saving operation (RC-EX3 only) It operates with the setting temperature fixed at 28°C for cooling, 22°C for heating or 25°C for auto. When fan control in cooling/ heating thermo-OFF setting is “Set fan speed”, fan speed during thermo-OFF is changed to “Low”. (Maximum capacity is restricted at 80%.) (30) Warm-up control (RC-EX3 only) Operation will be started 5 to 60 minutes before use according to the forecast made by the microcomputer which calculates...
  • Page 70 '17 • KX-T-254 '16 • PAC-T-251 (37) Peak-cut timer (RC-EX3 only) Power consumption can be reduced by restricting the maximum capacity. Set the [Start time], the [End time] and the capacity limit % (Peak-cut %). ・ 4-operation patterns per day can be set at maximum. ・...

  • Page 71: System Troubleshooting Procedure

    '17 • KX-T-254 9. SYSTEM TROUBLESHOOTING PROCEDURE 9.1 Basics of troubleshooting Basic troubleshooting is to check/analyze/save data by connecting the Mente PC. Whenever arriving at the site, always connect the Mente PC before starting work. Method of error data analysis (Basic procedure) •...

  • Page 72: Contents Of Troubleshooting

    '17 • KX-T-254 '14 • KX-T-222 9.2 Contents of troubleshooting 9.2 Contents of troubleshooting (1) List of inspection displays (indoor units) (a) List of inspection displays (indoor units) Remote control Name of inspection Classification Page error code None Operates but does not cool System error System error None...
  • Page 73 '17 • KX-T-254 Troubleshooting Green Error code Content Keeps flashing Stays OFF None Indoor Operates but does not cool Remote control: Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Check the indoor fan operation. Check the temperature difference between return and suction air of indoor unit.
  • Page 74 '17 • KX-T-254 Green Content Error code Keeps flashing Stays OFF Indoor None Operates but does not heat Remote control: Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Check the indoor fan operation. Check the temperature difference between return and suction air of indoor unit.
  • Page 75 '17 • KX-T-254 Green Content Error code – – Indoor None Excessive noise/vibration (1/3) Remote control: – – Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure If excessive noise/vibration persists when sufficient time has elapsed after Does noise/ vibration occur during stopping the unit, it is or soon after stopping...
  • Page 76 '17 • KX-T-254 Green Content Error code – – Indoor None Excessive noise/vibration (2/3) Remote control: – – Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure From previous page Rearrange the piping to Are the pipes avoid contact with the contacting with the casing.
  • Page 77 '17 • KX-T-254 Green Content Error code – – Indoor None Excessive noise/vibration (3/3) Remote control: – – Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure From previous page If insufficient cooling/ [Adjustment heating problem happens during commissioning] due to anomalous operating Does noise/vibration occur when the conditions at cooling...
  • Page 78 '17 • KX-T-254 Green Content Error code Louver motor failure Keeps flashing Stays OFF Indoor None Remote control: Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure L Check at the indoor unit side. Operate after waiting for more than 1 minute.
  • Page 79 '17 • KX-T-254 Green Power source system anomaly Content Error code Stays OFF Stays OFF Indoor None Remote control: (Power source to indoor unit PCB) Stays OFF 2-time flash Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure AC 220-240V detected between L-N on the indoor terminal block?
  • Page 80 '17 • KX-T-254 Green Content Error code Power source system error Keeps flashing Stays OFF Indoor None Remote control: (Power source to remote control) Keeps flashing 2-time flash Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the connection of the Correct.
  • Page 81 '17 • KX-T-254 Green Content Error code WAIT Keeps flashing Stays OFF Indoor WAIT Remote control: Keeps flashing Keeps flashing Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure (In case that is kept WAIT on displaying on the remote control for more than 2 minutes is kept on WAIT...
  • Page 82 '17 • KX-T-254 Green Content Error code Keeps flashing Stays OFF Indoor Remote control: WAIT WAIT Keeps flashing Keeps flashing Outdoor 5. Troubleshooting 1. Applicable model FDC224, 280KXZPE1 only Diagnosis Countermeasure (In case of fuse blown, how to check the unit before replacement of fuse.) Isn't there any short circuit...
  • Page 83 '17 • KX-T-254 Green Content Error code Keeps flashing Stays OFF Indoor Remote control: WAIT WAIT Keeps flashing Keeps flashing Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure (No display on the remote control after power ON.) No display on the remote control after power ON.
  • Page 84 '17 • KX-T-254 Green Content Error code Keeps flashing Stays OFF Indoor Remote control: WAIT WAIT Keeps flashing Keeps flashing Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure (In case that is kept WAIT on displaying on the remote control for more than 2 minutes is kept on WAIT...
  • Page 85 '17 • KX-T-254 Green Content Error code Stays OFF Stays OFF Indoor Remote control: WAIT WAIT Stays OFF Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure (In case that LED on outdoor control PCB stays OFF.) In case that LED on outdoor control PCB stays OFF.
  • Page 86 '17 • KX-T-254 Green Content Error code Stays OFF Stays OFF Indoor Remote control: WAIT WAIT Stays OFF Stays OFF Outdoor 5. Troubleshooting 1. Applicable model FDC224, 280KXZPE1 only Diagnosis Countermeasure (In case of fuse blown, how to check the unit before replacement of fuse.) From previous page.
  • Page 87 '17 • KX-T-254 Green Content Error code Stays OFF Stays OFF Indoor Remote control: [No display] [No display] Stays OFF Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure (No display on the remote control after power ON.) No display on the remote control after power ON.
  • Page 88 '17 • KX-T-254 Green Content Error code Remote control Keeps flashing Stays OFF Indoor Remote control: communication error Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is it possible to Malfunction by temporary reset normally by the power noise.
  • Page 89 '17 • KX-T-254 Green Content Error code Keeps flashing Keeps flashing Indoor Duplicated indoor unit address Remote control: Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the number of Review number of connected indoor units up connected units.
  • Page 90 '17 • KX-T-254 Green Content Error code Keeps flashing 2-time flash Indoor E3/5 Outdoor unit signal line error Remote control: Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure E3 is a communication error that occurs when communication between indoor and outdoor units is not established at all.
  • Page 91 '17 • KX-T-254 Green Content Error code Keeps flashing *See below Indoor Communication error during operation Remote control: Keeps flashing 2-time flash Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure * In case that indoor red LED flashes 2 times Note (1) Check the connection (disconnection, looseness) of signal wires at outdoor terminal block.
  • Page 92 '17 • KX-T-254 Green Indoor heat exchanger Content Error code Keeps flashing 1-time flash Indoor Remote control: temperature thermistor anomaly (Thi-R) Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Insert the connector the connector of thermistor connected securely.
  • Page 93 '17 • KX-T-254 Green Indoor return air Content Error code Keeps flashing 1-time flash Indoor Remote control: temperature thermistor anomaly (Thi-A) Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure the connector of Insert the connector thermistor connected securely.
  • Page 94 '17 • KX-T-254 Green Content Error code Keeps flashing 1-time flash Indoor Drain trouble Remote control: Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model FDT, FDTC, FDTW, FDTQ, Diagnosis Countermeasure FDTS, FDU, FDUM, FDUT and FDU-F series Check the error data in the remote control. Is there any overflow? Is DC 12V detected at CN1...
  • Page 95 '17 • KX-T-254 Green Content Error code Excessive number of indoor units (more than 17 units) Keeps flashing Stays OFF Indoor Remote control: by controlling one remote control Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Aren't more...
  • Page 96 '17 • KX-T-254 Green Green Error code Content Content Error code Address setting error between Address setting error between Keeps flashing Stays OFF Indoor Remote control: Remote control: master and slave indoor units master and slave indoor units Indoor Keeps flashing Keeps flashing Keeps flashing Stays OFF Outdoor 5.
  • Page 97 '17 • KX-T-254 Green Content Error code Address setting error Keeps flashing Keeps flashing Indoor Remote control: by mixed setting method Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Isn't the automatic setting and Review address setting.
  • Page 98 '17 • KX-T-254 Green Content Error code Indoor DC fan motor anomaly Keeps flashing 1-time flash Indoor Remote control: Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Does any foreign material Remove foreign material. intervene in rotational area of fan propeller? 2.
  • Page 99 '17 • KX-T-254 Green Content Error code Address setting error of Keeps flashing 1-ime flash Indoor Remote control: master and slave indoor units Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the address setting for the master indoor Correct the address setting of unit correct?
  • Page 100 '17 • KX-T-254 Green Content Error code Indoor unit operation Keeps flashing 1-time flash Indoor Remote control: check mode anomaly Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure E19 occurs when the power ON Is SW7-1 Indoor unit PCB anomaly on the indoor control...
  • Page 101 '17 • KX-T-254 Green Content Error code Indoor DC fan motor rotation Keeps flashing 1-time flash Indoor Remote control: speed anomaly Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Does any foreign material Remove foreign material. intervene in rotational area of fan propeller? 2.
  • Page 102 '17 • KX-T-254 Green Content Error code Defective panel switch Keeps flashing 1-time flash Indoor Remote control: operation Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Reset the error and close Is grill opened? the grill.
  • Page 103 '17 • KX-T-254 Green Content Error code Remote control Keeps flashing Stays OFF Indoor Remote control: temperature thermistor anomaly (Thc) Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure the connector of Insert the connector thermistor connected securely.
  • Page 104 '17 • KX-T-254 Green Error code Content Keeps flashing Stays OFF Indoor Remote control: Emergency stop 7-segment display: Keeps flashing 1-time flash Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Check and save the data of operating conditions. Save data for 30 minutes before stopping in Mente PC.

  • Page 105: Instruction Of How To Replace Pcb

    '17 • KX-T-254 9.3 Instruction of how to replace PCB PSC012D050B SAFETY PRECAUTIONS Read the "SAFETY PRECAUTIONS" carefully first of all and then strictly follow it during the replacement in order to protect yourself. The precautionary items mentioned below are distinguished into two levels, WARNING and CAUTION. Both mentions the important items to protect your health and safety so strictly follow them by any means.

  • Page 106: Indoor Pcb Setting

    '17 • KX-T-254 9.4 Indoor PCB setting 9.4 Indoor PCB setting Code Input Default setting Remarks Indoor unit address No.(Order of 10) Indoor unit address No.(Order of 1) Outdoor unit address No.(Order of 10) Outdoor unit address No.(Order of 1) SW5-1 Superlink selection Automatic*/Previous SL...

  • Page 107: Option Parts

    '17 • KX-T-254 10 OPTION PARTS 5.1 WIRELESS KIT (RCN-T-5AW-E2) 10.1 Wireless kit (RCN-T-5AW-E2) Notes: ● Following function of FDT indoor unit series are not able to be set with this wireless remote control (RCN-E2). 1. Flap control system ● ...
  • Page 108 '17 • KX-T-254 WARNING ● Do not wash the unit with water. ● Use the cables for wiring, and connect them securely with care to protect 12D035 electronic parts from external forces. ● When installing the unit at a hospital, telecommunication facility, etc., take measures to suppress electric noises.
  • Page 109 ● Do not operate the unit with wet hands. It could cause electric shocks. '17 • KX-T-254 ③ ② Preparation before installation (continued) To change setting Master/Slave setting when using Installa plural remote controls 1. Remove the cover by unscrewing two screws from the back of receiver. 2.
  • Page 110 Auto restart ON : Valid OFF : Invalid '17 • KX-T-254 ③ How to install the receiver(continued) en using Installation of the receiver ① r or ② Put the wiring of the receiver through the opening. trol can e indoor ③...
  • Page 111 '17 • KX-T-254 ④ ④ Wire Wireless remote control 2. Setting Installation tips for the remote control holder The fo Fix the remote control holder using the screws supplied with this product. Button * Precautions for installing the holder FAN SPEED Holder f o r ●...
  • Page 112 '17 • KX-T-254 ④ Wireless remote control (continued) 2. Setting details The following functions can be set. Button Number indicator Function setting Fun speed setting : Standard FAN SPEED Fun speed setting : Setting 1 * ontro l Fun speed setting : Setting 2 * Room heating temperature adjustment : Disable Room heating temperature adjustment : +1°C MODE...
  • Page 113 '17 • KX-T-254 ⑤ ⑤ Receiver Rece 2. Correl 1 Control plural indoor units with one remote control Restrictions on the thickness and length of wire and re (Maximun total extension 600m.) Up to 16 indoor units can be connected. The dr Standard Within 0.3 mm²...
  • Page 114 '17 • KX-T-254 ⑤ Receiver (continued) 2. Correlation between illuminance at the receiver th of wire The receivable area of the and reachable area of the signal in a plain view. signal when the illuminance The drawing in the right shows the correlation at the receiver is 300lux between the reachable area of the signal and illuminance at the receiver when the wireless...

  • Page 115: Simple Wired Remote Control (Rch-E3)

    '17 • KX-T-254 10.2 Simple wired remote control (RCH-E PJZ000Z272 Names and functions of sections Remote control sensor Operation/Inspection lamp ON/OFF button Button to start/stop the air-conditioner During operation: Green failure: Red MODE button Use to select the mode. FAN SPEED button Button to set the fan speed TEMP button Use to raise the setting temperature.
  • Page 116 '17 • KX-T-254 MITSUBISHI HEAVY INDUSTRIES,LTD. AIR-CONDITIONING & REFRIGERATION SYSTEMS HEADQUARTERS Remote control installation dimensions In case of embedding wiring Wall surface Wiring Wiring outlet Electrical box (In case of embedding wiring) （Prepare on site） 12×7 slot hole Installation hole 9×4.5 slot hole （2 places）...
  • Page 117 '17 • KX-T-254 In case of exposing cord Simple Remote Control Installation Manual PJZ012D069 ⑴　 Make certain to remove a screw on the bottom surface of the remote control. Read together with indoor unit's installation manual. WARNING ⑴ ● Fasten the wiring to the terminal securely and hold the cable securely so as not to apply Screw ⑵　Remove the upper case of the remote control.
  • Page 118 '17 • KX-T-254 3. Master/ slave setting when more than one remote control are used ⑴　 Up to two remote controls can be connected to one unit (or one group) of indoor unit. Switch Setting Function detail Slave remote control indoor unit SW1-1 Master remote control...
  • Page 119 connecting section. Be careful about contact failure. unit. (No polarity of X and Y) 100 - 200m･････････････････0.5mm × 2 cores Under 300m･････････････････0.75mm × 2 cores ⑹　 Mount the upper case for restoring to its former state so as not to crimp the remote control cord, Under 400m･････････････････1.25mm ×...
  • Page 120 ct failure. “88” blinks on the temperature setting indicator. (blinking for approximately 2 to 10 seconds while × 2 cores AIR CON No. data is read) Then, the return air temperature is displayed. When is pressed, return × 2 cores to the indoor unit selection display (example, “U 000”).

  • Page 121: Motion Sensor Kit (Lb-T-5W-E)

    '17 • KX-T-254 PJF012D036 201609 10.3 Motion sensor kit (LB-T-5W-E) PJF012D036 WARNING Inst ● Connect the wiring to the PWB in the control box on the indoor unit and hold the wiring ① Loo securely so as not to apply unexpected stress on the PWB. ②...
  • Page 122 Motion sensor '17 • KX-T-254 Installing the motion sensor It is possible to install the motion sensor by replacing with a corner lid on the panel. The mo Aim of the detectable scope Set the Refer to Indoor unit Note: It Hight of the ceiling about 4.5 about 6.4...
  • Page 123 D036 201609 '17 • KX-T-254 Installation of the motion sensor ① Loosen the bolts which fix the panel, and make a gap between the panel and the indoor unit. ② Pass the wiring of the motion sensor through the opening of the panel. ③...
  • Page 124 Because of our policy of continuous improvement, we reserve the right to make changes in all specifications without notice. Because of our policy of continuous improvement, we reserve the right to make changes in all specifications without notice. Copyright MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD. Copyright MITSUBISHI HEAVY INDUSTRIES, LTD.

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