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

Vrf inverter multi-system air-conditioners indoor unit, ceiling cassette - 4 way compact type
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TECHNICAL MANUAL
VRF INVERTER MULTI-SYSTEM AIR-CONDITIONERS
(INDOOR UNIT)
KXZ series
Ceiling cassette - 4 way compact type
FDTC15KXZE1
FDTC22KXZE1
FDTC28KXZE1
FDTC36KXZE1
FDTC45KXZE1
FDTC56KXZE1
Note:
•
(1) Regarding the outdoor unit KXZ series, refer to the No.'14
No.'17
KX-T-265.
•
Manual No.'18•KX-T-281
updated December 14, 2018
KX-T-223, No.'15
KX-T-227 and
•
•

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  • Page 1 VRF INVERTER MULTI-SYSTEM AIR-CONDITIONERS (INDOOR UNIT) KXZ series Ceiling cassette - 4 way compact type FDTC15KXZE1 FDTC22KXZE1 FDTC28KXZE1 FDTC36KXZE1 FDTC45KXZE1 FDTC56KXZE1 Note: • (1) Regarding the outdoor unit KXZ series, refer to the No.'14 KX-T-223, No.'15 KX-T-227 and • • No.'17 KX-T-265. •...

  • Page 2: Table Of Contents

    '18 • KX-T-281 CONTENTS 1. INFORMATION ....................2. SPECIFICATIONS .................... 3. EXTERIOR DIMENSIONS ................(1) Indoor units ......................(2) Remote control (Option parts) ................4. ELECTRICAL WIRING ..................5. NOISE LEVEL ......................6. TEMPERATURE AND VELOCITY DISTRIBUTION .........

  • Page 3: Information

    10°C or more. Without 1.5kW-indoor units connection in the system, the outdoor lowest temperature for FDC112- 335KXE6 is -15°C and that for FDC400-1360KXE6 is -5°C. (b) KXZ outdoor units . KXZ series (KXZ, KXZX, KXZR) does not have installation limitation on 1.5kW-indoor unit connection. ■ 1.2 How to read the model name...

  • Page 4: Specifications

    '18 • KX-T-281 2. SPECIFICATIONS Models FDTC15KXZE1, 22KXZE1, 28KXZE1, 36KXZE1, 45KXZE1, 56KXZE1 PJF000Z498 – –...

  • Page 5: Exterior Dimensions

    '18 • KX-T-281 3. EXTERIOR DIMENSIONS (1) Indoor units All models PJF000Z501 – –...

  • Page 6: Remote Control (Option Parts)

    '18 • KX-T-281 (2) Remote control (Option parts) (a) Wired remote control Model RC-EX3A Installation space Dimensions (Viewed from front) 30mm 30mm Wiring 配線 30mm 30mm 30mm 30mm Fixing holes 固定穴 R/C temperature sensor Secure minimum spaces for disassembling the case. Upper left and Upper right sides ……30mm or more Bottom side…120mm or more...
  • Page 7 '18 • KX-T-281 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 8 '18 • KX-T-281 Wireless remote control (RCN-E2) Unit: mm – –...

  • Page 9: Electrical Wiring

    '18 • KX-T-281 4. ELECTRICAL WIRING All models PJF000Z504 – –...

  • Page 10: Noise Level

    '18 • KX-T-281 5. NOISE LEVEL 4. NOISE LEVEL Notes (1) The data are based on the following conditions. 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 Ambient air tempetature: Indoor unit 27˚C DB, 19˚C WB.

  • Page 11: Temperature And Velocity Distribution

    '18 • KX-T-281 6. 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. Model FDTC15KXZE1 FDTC15KXZE1 Cooling...
  • Page 12 '18 • KX-T-281 Models FDTC22, 28KXZE1 FDTC22,28 KXZE1 Cooling Air flow: P-Hi Louver position Temperature distribution (℃) 2.7m 2.7m 15 15 15 15 18 18 18 18 21 21 21 21 24 24 24 24 Velocity distribution (m/sec) 2.7m 2.7m 2.7m Heating Air flow: P-Hi...
  • Page 13 '18 • KX-T-281 FDTC36KXZE1 Model FDTC36KXZE1 Cooling Air flow: P-Hi Louver position Temperature distribution (℃) 2.7m 2.7m 15 15 15 15 18 18 18 18 21 21 21 21 24 24 24 24 Velocity distribution (m/sec) 2.7m 2.7m 2.7m Heating Air flow: P-Hi Temperature distribution Louver position...
  • Page 14 '18 • KX-T-281 FDTC45KXZE1 Model FDTC45KXZE1 Cooling Air flow: P-Hi Louver position Temperature distribution (℃) 2.7m 2.7m 2.7m 2.7m 15 15 15 15 18 18 18 18 21 21 21 21 24 24 24 24 Velocity distribution (m/sec) 2.7m 2.7m 2.7m 2.7m Heating...
  • Page 15 '18 • KX-T-281 Model FDTC56KXZE1 FDTC56KXZE1 Cooling Air flow: P-Hi Louver position Temperature distribution (℃) 2.7m 2.7m 2.7m 15 15 15 15 18 18 18 18 21 21 21 21 24 24 24 24 Velocity distribution (m/sec) 2.7m 2.7m 2.7m Heating Air flow: P-Hi Louver position...

  • Page 16: Capacity Tables

    '18 • KX-T-281 7. 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 '18 • KX-T-281 FDTC22KXZE1 Model Cooling mode (kW) Heating mode (kW) Indoor air temperature Outdoor Indoor temperature temperature Air flow 23 ℃DB 26 ℃DB 27 ℃DB 28 ℃DB 31 ℃DB 33 ℃DB ℃DB Air flow temperature 14 ℃WB 16 ℃WB 18 ℃WB 19 ℃WB 20 ℃WB...
  • Page 18 '18 • KX-T-281 FDTC28KXZE1 Model Cooling mode (kW) Heating mode (kW) Indoor air temperature Outdoor Indoor temperature temperature Air flow 23 ℃DB 26 ℃DB 27 ℃DB 28 ℃DB 31 ℃DB 33 ℃DB ℃DB Air flow temperature 14 ℃WB 16 ℃WB 18 ℃WB 19 ℃WB 20 ℃WB...
  • Page 19 '18 • KX-T-281 FDTC36KXZE1 Model Cooling mode (kW) Heating mode (kW) Indoor air temperature Outdoor Indoor temperature temperature Air flow 23 ℃DB 26 ℃DB 27 ℃DB 28 ℃DB 31 ℃DB 33 ℃DB ℃DB Air flow temperature 14 ℃WB 16 ℃WB 18 ℃WB 19 ℃WB 20 ℃WB...
  • Page 20 '18 • KX-T-281 FDTC45KXZE1 Model Cooling mode (kW) Heating mode (kW) Indoor air temperature Outdoor Indoor temperature temperature Air flow 23 ℃DB 26 ℃DB 27 ℃DB 28 ℃DB 31 ℃DB 33 ℃DB ℃DB Air flow temperature 14 ℃WB 16 ℃WB 18 ℃WB 19 ℃WB 20 ℃WB...
  • Page 21 '18 • KX-T-281 FDTC56KXZE1 Model Cooling mode (kW) Heating mode (kW) Indoor air temperature Outdoor Indoor temperature temperature Air flow 23 ℃DB 26 ℃DB 27 ℃DB 28 ℃DB 31 ℃DB 33 ℃DB ℃DB Air flow temperature 14 ℃WB 16 ℃WB 18 ℃WB 19 ℃WB 20 ℃WB...

  • Page 22: Application Data

    '18 • KX-T-281 8. APPLICATION DATA PJF012D501 8.1 Installation of indoor unit ①Be This manual is for the installation of the indoor unit. ●Insta For electrical wiring work (Indoor unit), refer to page 29. For remote control installation, refer to page CAUTION ●Confi 33.
  • Page 23 '18 • KX-T-281 2D501 ①Before installation ③Preparation before installation ●Install correctly according to the installation manual. ●If suspension bolt becomes longer, do reinforcement of earthquake resistant. When moving the indoor unit, hold only ○For grid ceiling ●Confirm the following points: the hanging hardware (4 places) only, When suspension bolt length is over 500mm, or the gap between the ceiling and roof is ○Unit type/Power source specification...
  • Page 24 '18 • KX-T-281 ⑤Refrigerant pipe (continued) ④Installation of indoor unit (continued) ⑥Dra ● W 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 25 '18 • KX-T-281 ⑧Panel installation ⑥Drain pipe (continued) ● When sharing a drain pipe for more than 1 ● Install the panel on the indoor unit after electrical wiring work. As wide as possible (about100mm) unit, lay the main pipe 100mm below the ●...
  • Page 26 '18 • KX-T-281 ・ Panel installation PJF012D503 Read this manual together with the indoor unit’s installation manual. * Caution before use <Removal> 3 Removing the inlet grille ①Be careful the installation height when installing the indoor unit. ① While placing a nger behind the stopper (2 places) Also note that the installation height of this indoor unit is different from that of current (old) unit.
  • Page 27 '18 • KX-T-281 D503 201808 For the Draft prevention panel 6 Orientation of the panel installation Take note that there is an orientation to install the panel. ① (Wiring color: Red, Black) Install the panel with the orientation shown on the right. •...
  • Page 28 '18 • KX-T-281 FRESH AIR INTAKE (Location for installation) FOR FDTC At the time of installation use the duct hole (cut out) located at the positions shown in follwing diagram, as and when required. (1)Temperature conditions for OA spacer ・Adjust the temperature conditions of mixed air with outdoor air and indoor air within the usage range of suction air temperature for the air-conditioner.
  • Page 29 '18 • KX-T-281 CHARACTERISTICS OF AIR FLOW IN DIVIDED DUCT FOR FDTC Models FDTC15,22,28,36KXZE1 All air flow (Hi) All air flow (P-Hi) Main air flow (Hi) Air flow in divided duct (P-Hi) Main air flow (P-Hi) Air flow in divided Air flow in divided duct (P-Hi) duct (Hi)

  • Page 30: Electric Wiring Work Instruction

    '18 • KX-T-281 8.2 Electric wiring work instruction 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 31 '18 • KX-T-281 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. Operation from the eco touch remote Operation from the standard remote control AIR CON NO.
  • Page 32 '18 • KX-T-281 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 Setting ＆...
  • Page 33 '18 • KX-T-281 ⑥ Operation and setting from remote control (continued) Setting ＆ display item Description RC-EX3A 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. Display [Heating stand-by display] [Defrost operation display] [Auto cooling/heating display] [Display temp.

  • Page 34: Installation Of Wired Remote Control (Option Parts)

    '18 • KX-T-281 8.3 Installation of wired remote control (Option parts) PJZ012A171 Model RC-EX3A 　 1 . Safety precautions ● s i h l a u y l l t r a g n i a t s t a l l n o i a t s t l l...
  • Page 35 '18 • KX-T-281 WARNING Do not install the unit in appropriate environment or where inflammable gas could generate, flow in, accumulate or leak. t f I s i t c a l s n i l i o , t s i v l o , r o corrosive gas (ammonium, sulfuric compound, acid, etc) or where acidic or alkaline...
  • Page 36 '18 • KX-T-281 CAUTION Do not install the remote control at following places. i t a r t n . l o ・Where it is exposed to direct sunlight ・Where the ambient temperature becomes 0 ° C or below, or 40 ° C or above ・...
  • Page 37 '18 • KX-T-281 　 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 38 '18 • KX-T-281 　 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) Fixing holes 固定穴 センサー 端子 Sensor USB port Terminal block To disassemble the R/C case into the upper and lower pieces after assembling them once ess at the lower part of...
  • Page 39 ブッ シング パテで シール する こ と '18 • KX-T-281 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 40 '18 • KX-T-281 　 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 41: Model Rc-E5

    '18 • KX-T-281 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 42 '18 • KX-T-281 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 43 '18 • KX-T-281 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 44 '18 • KX-T-281 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 45 '18 • KX-T-281 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 46: Outline Of Operation Control By Mycrocomputer

    '16 • PAC-T-251 '18 • KX-T-281 1.10 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER 9. OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER 1.10.1 Remote control 9.1 Remote control (Option parts) Wired remote control Wired remote control Model RC-EX3A Model RC-EX3A ⑤ LCD (With backlight) ③...
  • Page 47 '18 • KX-T-281 '16 • PAC-T-251 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 48 '16 • PAC-T-251 '18 • KX-T-281 Wireless remote control Model RCN-E2 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...

  • Page 49: Operation Control Function By The Wired Remote Control

    '16 • PAC-T-251 '18 • KX-T-281 1.10.2 Operation control function by the wired remote control 9.2 Operation control function by the wired remote control ●Model RC-EX3A (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 50 '16 • PAC-T-251 '18 • KX-T-281 ●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 51 '16 • PAC-T-251 '18 • KX-T-281 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 52: Operation Control Function By The Indoor Control

    '16 • PAC-T-251 '18 • KX-T-281 11.3 Operation control function by the indoor control 9.3 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 53 '16 • PAC-T-251 '18 • KX-T-281 (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 54 '16 • PAC-T-251 '18 • KX-T-281 Timer operation (a) RC-EX3A 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 55 '18 • KX-T-281 '16 • PAC-T-251 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 56 '18 • KX-T-281 '16 • PAC-T-251 Auto swing control Note Even if [Auto Swing] is selected, the louver position with anti draft function is fixed to position 1. (a) RC-EX3A 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 57 '18 • KX-T-281 '16 • PAC-T-251 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 58 '18 • KX-T-281 '16 • PAC-T-251 '16 • PAC-T-251 (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 59 '18 • KX-T-281 (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 60 the microcomputer of indoor unit become ineffective. (14) Cooling, dehumidifying frost protection To prevent frosting during cooling mode or dehumidifying mode operation, the of compressor speed is reduced if '18 • KX-T-281 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 61 '18 • KX-T-281 (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 62 Blue Blue '18 • KX-T-281 ■ 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 63 '18 • KX-T-281 (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 64 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 '18 •...
  • Page 65 permission prohibition setting Operation Operation permission Operation permission/ permission Operation( ) prohibition zone permission '18 • KX-T-281 ( ※ ) Operation prohibition zone is determined by the OR judgment between CnT operation prohibition zone and CnTA '16 • PAC-T-251 operation prohibition zone. (21) Temporary stop input In case of CnT ③...
  • Page 66 '16 • PAC-T-251 '18 • KX-T-281 (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 67 '18 • KX-T-281 (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 68 '18 • KX-T-281 (29) Energy-saving operation (RC-EX3A 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-EX3A only) Operation will be started 5 to 60 minutes before use according to the forecast made by the microcomputer which calculates...
  • Page 69 '18 • KX-T-281 '16 • PAC-T-251 (37) Peak-cut timer (RC-EX3A 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 70: System Troubleshooting Procedure

    '18 • KX-T-281 10. SYSTEM TROUBLESHOOTING PROCEDURE 10.1 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 71: Contents Of Troubleshooting

    '18 • KX-T-281 '14 • KX-T-222 10.2 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 72 '18 • KX-T-281 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 73 '18 • KX-T-281 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 74 '18 • KX-T-281 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 75 '18 • KX-T-281 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 76 '18 • KX-T-281 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 77 '18 • KX-T-281 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 78 '18 • KX-T-281 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 79 '18 • KX-T-281 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 80 '18 • KX-T-281 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 81 '18 • KX-T-281 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.) there any short-circuit between phases of noise...
  • Page 82 '18 • KX-T-281 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 83 '18 • KX-T-281 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 84 '18 • KX-T-281 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 unit control PCB stays OFF) In case that LED on outdoor unit control PCB stays OFF...
  • Page 85 '18 • KX-T-281 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 86 '18 • KX-T-281 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 Is DC10V...
  • Page 87 '18 • KX-T-281 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 88 '18 • KX-T-281 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 89 '18 • KX-T-281 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 90 '18 • KX-T-281 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 91 '18 • KX-T-281 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 92 '18 • KX-T-281 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 93 '18 • KX-T-281 Green Content Error code Keeps flashing 1-time flash Indoor Drain trouble Remote control: Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Check the error data in the remote control. Is there any overflow? Is DC 12V detected at CNI connector?
  • Page 94 '18 • KX-T-281 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 Are more...
  • Page 95 '18 • KX-T-281 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 96 '18 • KX-T-281 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 Is the automatic setting and Review address setting.
  • Page 97 '18 • KX-T-281 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 98 '18 • KX-T-281 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 99 '18 • KX-T-281 Green Content Error code Indoor unit operation check, Keeps flashing 1-time flash Indoor Remote control: drain motor 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 control PCB...
  • Page 100 '18 • KX-T-281 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 101 '18 • KX-T-281 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 102 '18 • KX-T-281 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 103: Instruction Of How To Replace Pcb

    '18 • KX-T-281 10.3 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 104: Indoor Pcb Setting

    '18 • KX-T-281 10.4 Indoor PCB setting Code Input Default setting Remark 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 Automatic SW5-2 Indoor unit address No.(Order of 100)

  • Page 105: Option Parts

    '18 • KX-T-281 11. OPTION PARTS PJF012D506 11.1 Wireless kit (RCN-TC-5AW-E2) Safety precautions •Please read this manual carefully before starting installation work to install the unit properly. All of the following are important information to be observed strictly. WARNING Failure to follow these instructions properly may result in serious consequences such as death, severe injury, etc.
  • Page 106 '18 • KX-T-281 WARNING • Do not wash the unit with water. It could cause electric shocks, fire, or break-down. • Use the specified cables for wiring, and connect them securely with care to protect with electronic parts from external forces. * Pr Improper connections or fixing could cause heat generation, fire, etc. • A • When installing the unit at a hospital, telecommunication facility, etc., take •...
  • Page 107 It could cause electric shocks. '18 • KX-T-281 Preparation before installation (continued) To change setting Master/Slave setting when using 1. Change the setting of switches on the accessory PCB. multiple remote controls Up to two receivers or wired remote controls can be installed on one indoor unit group.
  • Page 108 '18 • KX-T-281 How to install the receiver(continued) Installation of the receiver 1 Connect the wire connector (Communication) to CNB on PCB. 2 Connect the wire connector (Receiver) to CN3 on PCB. 3 Install the PCB mounting supports on the bracket (Sheet metal). 4 Install PCB on the PCB mounting supports. 5 Insert the bracket (Sheet metal) in one side of control box, and fix the other side with screws as n, it shown in the figure.
  • Page 109 '18 • KX-T-281 Wireless remote control Installation tips for the remote control holder Fix the remote control holder using the screws supplied with this product. * Precautions for installing the holder Holder for Wood screw • Adjust the position so that it is upright. remote control • Ensure that the screw heads are not protruding. •...
  • Page 110 '18 • KX-T-281 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 * Fun speed setting : Setting 2 * Room heating temperature adjustment : Disable Room heating temperature adjustment : +1°C MODE Room heating temperature adjustment : +2°C...
  • Page 111 '18 • KX-T-281 Receiver 1 Control multiple indoor units with one remote control Restrictions on the thickness and length of wire (Maximum length is 600m.) Up to 16 indoor units can be connected. Standard Within 0.3 mm² × 100m 1. Connect the XY terminal with 2 cores wire. As for the size, refer to the note on the right.
  • Page 112 '18 • KX-T-281 Receiver (continued) 2. Correlation between illuminance at the The receivable area of the receiver and reachable area of the signal signal when the illuminance in a plain view. at the receiver is 300lux The drawing in the right shows the correlation between the reachable area of the signal and illuminance at the receiver when the remote control is...

  • Page 113: Simple Wired Remote Control (Rch-E3)

    '18 • KX-T-281 11.2 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 114 '18 • KX-T-281 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 115 '18 • KX-T-281 3. Master/ s In case of exposing cord △ Simple Remote Control Installation Manual PJZ012D069 ⑴　 Make certain to remove a screw on the bottom surface of the ⑴　 Up to two r remote control. Read together with indoor unit's installation manual. WARNING ⑴...
  • Page 116 '18 • KX-T-281 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 117 ⑸　Connect the remote control cord to the terminal block. necessary at the wire 　　Connect the terminals (X and Y) of the remote control and the terminals (X and Y) of the indoor connecting section. Be careful about contact failure. unit. (No polarity of X and Y) 100 - 200m･････････････････0.5mm ×...
  • Page 118 ct failure. “88” blinks on the temperature setting indicator. (blinking for approximately 2 to 10 seconds while × 2 cores AIR CON No. data are read) Then, the return air temperature is displayed. When is pressed, return × 2 cores to the indoor unit selection display (example, “U 000”).

  • Page 119: Motion Sensor Kit (Lb-Tc-5W-E)

    '18 • KX-T-281 11.3 Motion sensor kit (LB-TC-5W-E) PJF012D504 WARNING ● Connect the wiring to the PCB in the control box on the indoor unit and fix the wiring ① Cu securely so as not to apply unexpected stress on the PCB. ②...
  • Page 120 Motion sensor '18 • KX-T-281 Installing the motion sensor It is possible to install the motion sensor by replacing the corner lid on the panel. The detectable area Indoor unit The motion Set the func Refer to the Note: It is no Wired Wirele Height of the ceiling...
  • Page 121 12D504 '18 • KX-T-281 Installation of the motion sensor ① Cut the half blanking (4 sections) of the panel as shown in the following figure. ② Pass the motion sensor wiring through the opening of the panel. ③ Connect the wiring connector to CNL (3P, black) on the PCB in the control box. ④...
  • Page 122 '18 • KX-T-281 Setting the motion sensor The motion sensor will not function if it is only installed. Set the function of the motion sensor by the wired or wireless remote control. Refer to the manual instruction of each remote control for the setting procedure. Note: It is not possible to set by the following remote control models or older ones.

  • Page 123: Oa Spacer (Fdtc Series)

    '18 • KX-T-281 11.4 OA spacer (FDTC series) PJZ012D125 This manual describes the installation methods for OA spacer (TC-OAS-E2) and the duct joint (TC-OAD-E). ◎This OA spacer is designed for assembling on the indoor unit (FDTC Series), not for be using independently. Application model FDTC15-56KXZE1 FDTC25-60VG...
  • Page 124 '18 • KX-T-281 2 Prior study before installation (Usage limitation) (1) Temperature conditions for OA spacer Adjust the temperature conditions of mixed air with outdoor air and indoor air within the • (Suspension bolts pitch) usage range of suction air temperature for the air-conditioner. Control box The usage temperature conditions of intake outdoor air and indoor air around the ducts are •...
  • Page 125 '18 • KX-T-281 4 Installation of OA spacer on the indoor unit OA spacer can be installed regardless whether the indoor unit has already been hanged or not. (It is recommended to install before hanging the unit for convenience of installation.) 1-1.
  • Page 126 '18 • KX-T-281 5 Installation of indoor unit Work procedure 1. This units is designed for 2 × 2 grid ceiling. If necessary, please detach the T bar temporarily before you install it. If it is installed on a ceiling other than 2 × 2 grid ceiling, provide an inspection port on the control box side. 2.

  • Page 127: Duct Joint (Fdtc Series)

    '18 • KX-T-281 DUCT JOINT FOR FDTC 11.5 Duct joint (FDTC series) PJZ012D073 PJZ012D073 This product is used by assembling on the spacer (TC-OAS-E2) ● 1.Before installation Confirm the following parts are included: ● Insulation 1 Insulation 2 Duct joint Screw (120 ×...
  • Page 128 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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