Mitsubishi FDC121KXZEN1-W Technical Manual

Mitsubishi FDC121KXZEN1-W Technical Manual

Vrf inverter multi-system air-conditioners
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TECHNICAL MANUAL
VRF INVERTER MULTI-SYSTEM AIR-CONDITIONERS
(OUTDOOR UNIT)
KXZ series (Heat pump type)
FDC121KXZEN1-W, 140KXZEN1-W, 155KXZEN1-W (1 Phase)
FDC121KXZES1-W, 140KXZES1-W, 155KXZES1-W (3 Phase)
(INDOOR UNIT)
Ceiling cassette-4 way type
FDT28KXZE1-W
36KXZE1-W
45KXZE1-W
56KXZE1-W
71KXZE1-W
90KXZE1-W
112KXZE1-W
140KXZE1-W
160KXZE1-W
Ceiling cassette-4 way
compact type
FDTC15KXZE1-W
22KXZE1-W
28KXZE1-W
36KXZE1-W
45KXZE1-W
56KXZE1-W
Manual No. '20
KX-T-373
updated March 04, 2021
Wall mounted type
FDK15KXZE1-W
22KXZE1-W
28KXZE1-W
36KXZE1-W
45KXZE1-W
56KXZE1-W
71KXZE1-W
90KXZE1-W

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Summary of Contents for Mitsubishi FDC121KXZEN1-W

  • Page 1 • updated March 04, 2021 TECHNICAL MANUAL VRF INVERTER MULTI-SYSTEM AIR-CONDITIONERS (OUTDOOR UNIT) KXZ series (Heat pump type) FDC121KXZEN1-W, 140KXZEN1-W, 155KXZEN1-W (1 Phase) FDC121KXZES1-W, 140KXZES1-W, 155KXZES1-W (3 Phase) (INDOOR UNIT) Ceiling cassette-4 way type Ceiling cassette-4 way Wall mounted type...
  • Page 2 '20 • KX-T-373 PREFACE Combination table for KXZE1 series and KXZE1-W series ( ) Date of launching in the market Indoor unit Connectable Same series Mixed series Same series remote control RC-E3 Category RC-E4 RC-E5 KXZE1 2-wire type KXZE1 KXZE1-W RC-EX1A KXZE1-W RC-EX3...
  • Page 3 '20 • KX-T-373 CONTENTS 1. GENERAL INFORMATION ................3 1.1 Increased indoor unit connection capacity ..........3 1.2 How to read the model name ..............3 1.3 Table of models .....................3 1.4 Model description (Option parts) ..............4 1.5 Branch pipe set and Header pipe set ............4 2.
  • Page 4 '20 • KX-T-373 8. OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER ....158 8.1 Remote control (Option parts) ............158 8.2 Operation control function by the wired remote control ....161 8.3 Operation control function by the indoor control ......164 8.4 Operation control function by the outdoor control ......
  • Page 5 ◯ ◯ ◯ ◯ (FDT) Ceiling cassette-4 way compact type ◯ ◯ ◯ ◯ ◯ ◯ (FDTC) Wall mounted type ◯ ◯ ◯ ◯ ◯ ◯ ◯ ◯ (FDK) FDC121KXZEN1-W, 140KXZEN1-W, 155KXZEN1-W Outdoor units to be combined FDC121KXZES1-W, 140KXZES1-W, 155KXZES1-W...
  • Page 6 '20 • KX-T-373 1.4 Model description (Option parts) (1) Table of indoor units panel (Option) Model Capacity Parts Model T-PSA-5BW-E Standard T-PSA-5BB-E 28,36,45,56,71,90,112,140,160 T-PSAE-5BW-E Prevention T-PSAE-5BB-E TC-PSAG-5AW-E Standard TC-PSA-5AW-E FDTC 15,22,28,36,45,56 TC-PSAGE-5AW-E Prevention TC-PSAE-5AW-E (2) Table of remote control (Option) (a) Wired remote control Model Remote control model...
  • Page 7 '20 • KX-T-373 2. OUTDOOR UNIT 2.1 Specifications Models FDC121KXZEN1-W, 140KXZEN1-W, 155KXZEN1-W, FDC121KXZES1-W, 140KXZES1-W, 155KXZES1-W PCA001Z899...
  • Page 8 Weights of packing parts Unit :kg Metal Packing Gross Parts Foam Paper Plastic Wood Glass Other Weight weight Polystyrene Aluminium Steel (Total) FDC121KXZEN1-W 93.00 8.00 3.63 0.14 0.07 4.13 0.03 FDC140KXZEN1-W 93.00 8.00 3.63 0.14 0.07 4.13 0.03 FDC155KXZEN1-W 93.00 8.00...
  • Page 9 '20 • KX-T-373 2.2 Exterior dimensions All models PCA001Z900...
  • Page 10 '20 • KX-T-373 2.3 Electrical wiring Models FDC121KXZEN1-W, 140KXZEN1-W, 155KXZEN1-W PCA001Z901 A...
  • Page 11 '20 • KX-T-373 Models FDC121KXZES1-W, 140KXZES1-W, 155KXZES1-W PCA001Z902 A...
  • Page 12 Measured based on JIS B 8616 Mike position as highest noise level in position as below Distance from front side Height (a) Sound power level Models FDC121KXZEN1-W 121KXZES1-W Cooling Heating Noise level 68 dB (A) Noise level 71 dB (A)
  • Page 13 '20 • KX-T-373 (b) Sound pressure level Models FDC 121KXZEN1-W 121KXZES1-W Cooling Heating Noise level 54 dB(A) Noise level 56 dB(A) 1000 2000 4000 8000 1000 2000 4000 8000 Mid octave band frequency (Hz) Mid octave band frequency (Hz) Models FDC 140KXZEN1-W 140KXZES1-W Cooling Heating...
  • Page 14 '20 • KX-T-373 COMPACT MULTI-AIR CONDITIONING SYSTEM OUTDOOR UNIT INSTALLATION MANUAL COMPACT MULTI-AIR CONDITIONING SYSTEM OUTDOOR UNIT INSTALLATION MANUAL 2.5 Application data 3. UNIT 2.5.1 Installation of outdoor unit ◎This manual describes outdoor unit installation work. ◎This manual describes outdoor unit installation work. Designed for R32 refrigerant Designed for R32 refrigerant PSC012D132...
  • Page 15 Ensure that no air enters in the refrigerant circuit when the unit is installed and removed. ● Do not control the system with main power switch. ● please r If air enters in the refrigerant circuit, the pressure in the refrigerant circuit becomes too high, which can cause burst and It can cause fire or water leakage.
  • Page 16 '20 • KX-T-373 MANUAL Take particular care in carrying in or moving the unit, and always perform 3. UNIT DELIVERY AND INSTALLATION such an operation with two or more persons. When you sling the unit for portage, do not fail to take into consideration the deviation of the gravity center from its center. CAUTION 12D132 Improper slinging may cause the unit to lose balance and fall.
  • Page 17 (on the indoor unit connection side). For determination of appropriate header, different diameter pipe joint and blind pipe sizes, ● please refer to "Header Set," (which can be purchased separately). se personal injury. ing the operating Attention '20 • KX-T-373 For the section between an indoor unit and the header, use a pipe of the diameter specified for the indoor unit.
  • Page 18 '20 • KX-T-373 Fix both liquid and gas service valves at the valve main bodies as illustrated on the right, and then fasten them, applying appropriate fastening torque. (1) Dress ref Do not hold the valve cap area with a spanner. Service valve size Tightening torque Tightening angle...
  • Page 19 Gas pipe Wiring s Gauge manifold Nitrogen Service point Power sou (check joint) Lo knob Hi knob Single-pha '20 • KX-T-373 220/240V 220V 60Hz Three-phas 380/415V 380V 60Hz Power sou Outdoor unit Vacuuming Please pull air from the check joints of the service valves on both liquid and gas sides. Single-pha 220/240V 220V 60Hz...
  • Page 20 '20 • KX-T-373 4-5. Heat insulation for prevention of dew condensation (1) Dress refrigerant pipes (both gas and liquid pipes) for heat insulation and prevention of dew condensation. Improper heat insulation/anti-dew dressing can result in a water leak or dripping causing damage to household effects, etc. (2) Use a heat insulating material that can withstand 120℃...
  • Page 21 ・ ・ ・ Power source (Indoor unit side) Earth Circuit ・ ・ ・ Single-phase leakage breaker 220/240V 50Hz A ・ B A ・ B A ・ B breaker for cabling ・ ・ ・ CAUTION 220V 60Hz ・ ・ ・ X ・ Y X...
  • Page 22 '20 • KX-T-373 Indoor and outdoor signal wires Unless state When previo Connect the signal line between indoor unit and outdoor unit to A1 and B1. ● Connect the signal line between outdoor units to A2 and B2. Manual add ●...
  • Page 23 3 minute microcomputers built in the respective controllers. Address setting needs to be done for both outdoor and indoor units. Turn on power in the order of the outdoor units and then the indoor units. Use 1 minute as the rule of thumb for an interval between them. The communication protocol can be choosen from following two types.
  • Page 24 '20 • KX-T-373 Unless stated otherwise, the following procedures apply, when new SL is chosen for the communication protocol. When previous SL is chosen, use figures shown in [ ] in carrying out these procedures. Manual address setting Generally applicable to new SL/previous SL, use figures in [ ] with previous SL. ①...
  • Page 25 When you have confirmed an “AUE” indication on the display of each outdoor unit, engage the network connectors again. ⑩ Network polarity setting After you have made sure that the network connectors are engaged, select and enter “1” in P34 on the 7-segment display panel ofany outdoor unit (on only 1 unit) to specify network polarity.
  • Page 26 '20 • KX-T-373 Operating procedure The externa display pane (1) When single indoor unit is connected to the remote control. Item Operation Display "0" : Extern ① Press the AIR CON No. switch for 3 seconds or longer. Address change mode [CHANGE ADD.▼] "1"...
  • Page 27 →Forced termination Before you complete the present address setting session, press the “ON/OFF” switch. ・You c Then the display is change to exit from this mode and switch the display to the normal state. ・You c All address settings changed in the session will be aborted and not reflected. ・You c switch will continuously change the display indication to the next one in every 0.25 seconds when it is pressed for 0.75 seconds or longer.
  • Page 28 '20 • KX-T-373 The external input function of CnS1 can be changed by changing the setting in P07 on the 7-segment display panel. When a signal is input to CnS1, the following functions are enabled. CnS1 closed CnS1 opened "0" : External operation input Operation permitted Operation prohibition "1"...
  • Page 29 check operation if it is out of the applicable temperature range. ・You cannot check the fresh air ventilation indoor unit. (You can check indoor units other than the fresh air ventilation indoor unit on the same refrigerant system.) ・You cannot performe the check operation if the connected indoor unit is only one in one refrigerant system. ・You cannot performe the check operation if it is set at 0% in the demand mode or capacity save mode.
  • Page 30 '20 • KX-T-373 2.5.2 Safety precautions in handling air-conditioners with flammable refrigerants R32 REFRIGERANT USED PSA012B839F • • There is information included in the user’s manual and/or is leaked, together with an external ignition source, there is a installation manual. •...
  • Page 31 '20 • KX-T-373 CAUTION • Ensure that the apparatus is mounted securely. • The refrigerant charge shall be recovered into the • Ensure that seals or sealing materials have not correct recovery cylinders. and the process completed, make sure that the degraded to the point that they no longer serve the •...
  • Page 32 '20 • KX-T-373 Selection of installation location for the indoor unit ● Minimum installation area for indoor unit CAUTION The indoor unit shall be installed in a room with minimum installation area or more according to the refrigerant charge amount (factory refrigerant charge +additional refrigerant charge).
  • Page 33 '20 • KX-T-373 3. INDOOR UNIT 3.1 Specifications (1) Ceiling cassette-4 way type (FDT) Models FDT28KXZE1-W, 36KXZE1-W, 45KXZE1-W, 56KXZE1-W, 71KXZE1-W PJF000Z757...
  • Page 34 '20 • KX-T-373 Models FDT90KXZE1-W, 112KXZE1-W, 140KXZE1-W, 160KXZE1-W PJF000Z757...
  • Page 35 '20 • KX-T-373 (2) Ceiling cassette-4 way compact type (FDTC) Models FDTC15KXZE1-W, 22KXZE1-W, 28KXZE1-W, 36KXZE1-W, 45KXZE1-W, 56KXZE1-W PJF000Z758...
  • Page 36 '20 • KX-T-373 (3) Wall mounted type (FDK) Models FDK15KXZE1-W, 22KXZE1-W, 28KXZE1-W, 36KXZE1-W, 45KXZE1-W PHA001Z173...
  • Page 37 '20 • KX-T-373 Models FDK56KXZE1-W, 71KXZE1-W, 90KXZE1-W PHA001Z173...
  • Page 38 '20 • KX-T-373 3.2 Exterior dimensions 3.2.1 Indoor unit (1) Ceiling cassette-4 way type (FDT) Models FDT28KXZE1-W, 36KXZE1-W, 45KXZE1-W, 56KXZE1-W, 71KXZE1-W PJF000Z759...
  • Page 39 '20 • KX-T-373 Models FDT90KXZE1-W, 112KXZE1-W, 140KXZE1-W, 160KXZE1-W PJF000Z760...
  • Page 40 '20 • KX-T-373 (2) Ceiling cassette-4 way compact type (FDTC) All models (a) Honeycomb type PJF000Z762...
  • Page 41 '20 • PAC-T-352 '20 • KX-T-373 (b) Grid type PJF000Z764 - 33 -...
  • Page 42 '20 • KX-T-373 (3) Wall mounted type (FDK) Models FDK15KXZE1-W, 22KXZE1-W, 28KXZE1-W, 36KXZE1-W, 45KXZE1-W, 56KXZE1-W PHA001Z176...
  • Page 43 '20 • KX-T-373 Models FDK71KXZE1-W, 90KXZE1-W PHA001Z177...
  • Page 44 '20 • KX-T-373 3.2.2 Remote control (Option parts) (1) 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 45 '20 • KX-T-373 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 46 '20 • KX-T-373 (2) Wireless remote control (RCN-E2, RCN-EK2) This remote control is an accessory of the wireless remote control kit. (Refer to 12.1 wireless kit) Unit: mm...
  • Page 47 '20 • KX-T-373 3.3 Electrical wiring (1) Ceiling cassette-4 way type (FDT) All models PJF000Z761...
  • Page 48 '20 • KX-T-373 (2) Ceiling cassette-4 way compact type (FDTC) All models PJF000Z763...
  • Page 49 '20 • KX-T-373 (3) Wall mounted type (FDK) All models PHA001Z178...
  • Page 50 '20 • KX-T-373 3.4 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 51 '20 • KX-T-373 (ii) Air flow : Hi Models FDT28,36KXZE1-W Model FDT45KXZE1-W Model FDT56KXZE1-W Noise level Cooling:32 dB (A) Noise level Cooling:33 dB (A) Noise level Cooling:33 dB (A) Heating:31 dB (A) Heating:33 dB (A) Heating:33 dB (A) Cooling Heating Cooling Heating Cooling...
  • Page 52 '20 • KX-T-373 Model FDT71KXZE1-W Model FDT90KXZE1-W Model FDT112KXZE1-W Noise level Cooling:32 dB (A) Noise level Cooling:36 dB (A) Noise level Cooling:37 dB (A) Heating:32 dB (A) Heating:36 dB (A) Heating:37 dB (A) Cooling Heating Cooling Heating Cooling Heating 1000 2000 4000 8000...
  • Page 53 '20 • KX-T-373 (2) Ceiling cassette-4 way compact type (FDTC) 1.5m Measured based on JIS B 8616 Mike (Center & low points) Mike position as right (a) Sound power level Model FDTC15KXZE1-W Models FDTC22,28KXZE1-W Model FDTC36KXZE1-W Noise level Cooling:47 dB (A) Noise level Cooling:49 dB (A) Noise level Cooling:54 dB (A) Heating:46 dB (A)
  • Page 54 '20 • KX-T-373 (ii) Air flow : Hi Model FDTC15KXZE1-W Models FDTC22,28KXZE1-W Model FDTC36KXZE1-W Noise level Cooling:30 dB (A) Noise level Cooling:32 dB (A) Noise level Cooling:36 dB (A) Heating:30 dB (A) Heating:32 dB (A) Heating:36 dB (A) Cooling Heating Cooling Heating Cooling...
  • Page 55 '20 • KX-T-373 (iv) Air flow : Lo Model FDTC15KXZE1-W Models FDTC22,28KXZE1-W Model FDTC36KXZE1-W Noise level Cooling:25 dB (A) Noise level Cooling:25 dB (A) Noise level Cooling:26 dB (A) Heating:22 dB (A) Heating:25 dB (A) Heating:26 dB (A) Cooling Heating Cooling Heating Cooling...
  • Page 56 '20 • KX-T-373 1000 2000 4000 8000 1000 2000 4000 8000 1000 2000 4000 8000 Mid octave band frequency (Hz) Mid octave band frequency (Hz) Mid octave band frequency (Hz) (b) Sound pressure level (i) Air flow : P-Hi Model FDK15KXZE1-W Models FDK22,28KXZE1-W Model FDK36KXZE1-W Noise level Cooling:38 dB (A)
  • Page 57 '20 • KX-T-373 1000 2000 4000 8000 1000 2000 4000 8000 1000 2000 4000 8000 Mid octave band frequency (Hz) Mid octave band frequency (Hz) Mid octave band frequency (Hz) Model FDK45KXZE1-W Model FDK56KXZE1-W Model FDK71KXZE1-W Noise level Cooling:41 dB (A) Noise level Cooling:41 dB (A) Noise level Cooling:40 dB (A) Heating:41 dB (A)
  • Page 58 '20 • KX-T-373 1000 2000 4000 8000 1000 2000 4000 8000 1000 2000 4000 8000 Mid octave band frequency (Hz) Mid octave band frequency (Hz) Mid octave band frequency (Hz) Model FDK90KXZE1-W Noise level Cooling:39 dB (A) Heating:39 dB (A) Cooling Heating 1000...
  • Page 59 '20 • KX-T-373 3.5 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. (1) Ceiling cassette-4 way (FDT) Models FDT28KXZE1-W, 36KXZE1-W, 45KXZE1-W :...
  • Page 60 '20 • KX-T-373 Models FDT56KXZE1-W, 71KXZE1-W : P-Hi : P-Hi Temperature distribution Velocity distribution : P-Hi Temperature distribution Velocity distribution ISD16448...
  • Page 61 '20 • KX-T-373 Models FDT90KXZE1-W, 112KXZE1-W, 140KXZE1-W, 160KXZE1-W : P-Hi : P-Hi Temperature distribution Velocity distribution : P-Hi Temperature distribution Velocity distribution ISD16448...
  • Page 62 '20 • KX-T-373 (2) Ceiling cassette-4 way compact (FDTC) FDTC15KXZE1 Model FDTC15KXZE1-W Cooling Air flow: P-Hi Louver position Temperature distribution (℃) 2.7m 2.7m 15 15 15 15 19 19 19 19 23 23 23 23 25 25 25 25 Velocity distribution (m/sec) 2.7m 2.7m...
  • Page 63 '20 • KX-T-373 Models FDTC22KXZE1-W, 28KXZE1-W 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 64 '20 • KX-T-373 FDTC36KXZE1 Model FDTC36KXZE1-W 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 65 '20 • KX-T-373 FDTC45KXZE1 Model FDTC45KXZE1-W 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 66 '20 • KX-T-373 Model FDTC56KXZE1-W 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 67 '20 • KX-T-373 (3) Wall mounded type (FDK) Model FDK15KXZE1-W Cooling Air fl  ow : P-Hi Louver position Temperature distribution Temperature distribution ( ℃) 2.7m Velocity distribution Velocity distribution (m/sec) 2.7m Heating Air fl  ow : P-Hi Louver position Temperature distribution Temperature distribution ( ℃) 2.7m Velocity distribution...
  • Page 68 '20 • KX-T-373 Models FDK22KXZE1-W, 28KXZE1-W : P-Hi Temperature distribution (℃ ) Velocity distribution (m/sec) : P-Hi Temperature distribution (℃ ) Velocity distribution (m/sec) ISD16504...
  • Page 69 '20 • KX-T-373 Model FDK36KXZE1-W : P-Hi Temperature distribution (℃ ) Velocity distribution (m/sec) : P-Hi Temperature distribution (℃ ) Velocity distribution (m/sec) ISD16504...
  • Page 70 '20 • KX-T-373 Model FDK45KXZE1-W : P-Hi Temperature distribution (℃ ) Velocity distribution (m/sec) : P-Hi Temperature distribution (℃ ) Velocity distribution (m/sec) ISD16504...
  • Page 71 '20 • KX-T-373 Model FDK56KXZE1-W : P-Hi Temperature distribution (℃ ) Velocity distribution (m/sec) : P-Hi Temperature distribution (℃ ) Velocity distribution (m/sec) ISD16504...
  • Page 72 '20 • KX-T-373 Model FDK71KXZE1-W : P-Hi Temperature distribution (℃ ) Velocity distribution (m/sec) : P-Hi Temperature distribution (℃ ) Velocity distribution (m/sec) ISD16504...
  • Page 73 '20 • KX-T-373 Model FDK90KXZE1-W : Cooling Air fl  ow : P-Hi P-Hi Louver position Temperature distribution ℃ (℃ ) 2.7m Velocity distribution m/sec (m/sec) 2.7m Heating Air fl  ow : P-Hi : P-Hi Louver position Temperature distribution ℃ (℃ ) 2.7m Velocity distribution m/sec (m/sec)
  • Page 74 '20 • KX-T-373 3.6 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 75 '20 • KX-T-373 FDT36KXZE1-W (kW) (kW) Model Cooling Mode Heating Mode Indoor air temperature Outdoor air Outdoor air Indoor air temperature 21 ℃DB 23 ℃DB 26 ℃DB 27 ℃DB 28 ℃DB 31 ℃DB 33 ℃DB Air flow temperature Air flow temperature 14 ℃WB 16 ℃WB...
  • Page 76 '20 • KX-T-373 FDT45KXZE1-W (kW) (kW) Model Cooling Mode Heating Mode Indoor air temperature Outdoor air Outdoor air Indoor air temperature 21 ℃DB 23 ℃DB 26 ℃DB 27 ℃DB 28 ℃DB 31 ℃DB 33 ℃DB Air flow temperature Air flow temperature 14 ℃WB 16 ℃WB...
  • Page 77 '20 • KX-T-373 FDT56KXZE1-W (kW) (kW) Model Cooling Mode Heating Mode Indoor air temperature Outdoor air Outdoor air Indoor air temperature 21 ℃DB 23 ℃DB 26 ℃DB 27 ℃DB 28 ℃DB 31 ℃DB 33 ℃DB Air flow temperature Air flow temperature 14 ℃WB 16 ℃WB...
  • Page 78 '20 • KX-T-373 FDT71KXZE1-W (kW) (kW) Model Cooling Mode Heating Mode Indoor air temperature Outdoor air Outdoor air Indoor air temperature 21 ℃DB 23 ℃DB 26 ℃DB 27 ℃DB 28 ℃DB 31 ℃DB 33 ℃DB Air flow temperature Air flow temperature 14 ℃WB 16 ℃WB...
  • Page 79 '20 • KX-T-373 FDT90KXZE1-W (kW) (kW) Model Cooling Mode Heating Mode Indoor air temperature Outdoor air Outdoor air Indoor air temperature 21 ℃DB 23 ℃DB 26 ℃DB 27 ℃DB 28 ℃DB 31 ℃DB 33 ℃DB Air flow temperature Air flow temperature 14 ℃WB 16 ℃WB...
  • Page 80 '20 • KX-T-373 FDT112KXZE1-W (kW) (kW) Model Cooling Mode Heating Mode Indoor air temperature Outdoor air Outdoor air Indoor air temperature 21 ℃DB 23 ℃DB 26 ℃DB 27 ℃DB 28 ℃DB 31 ℃DB 33 ℃DB Air flow temperature Air flow temperature 14 ℃WB 16 ℃WB...
  • Page 81 '20 • KX-T-373 FDT140KXZE1-W (kW) (kW) Model Cooling Mode Heating Mode Indoor air temperature Outdoor air Outdoor air Indoor air temperature 21 ℃DB 23 ℃DB 26 ℃DB 27 ℃DB 28 ℃DB 31 ℃DB 33 ℃DB Air flow temperature Air flow temperature 14 ℃WB 16 ℃WB...
  • Page 82 '20 • KX-T-373 FDT160KXZE1-W (kW) (kW) Model Cooling Mode Heating Mode Indoor air temperature Outdoor air Outdoor air Indoor air temperature 21 ℃DB 23 ℃DB 26 ℃DB 27 ℃DB 28 ℃DB 31 ℃DB 33 ℃DB Air flow temperature Air flow temperature 14 ℃WB 16 ℃WB...
  • Page 83 '20 • KX-T-373 (2) Ceiling cassette-4 way compact type (FDTC) FDTC15KXZE1-W (kW) (kW) Model Cooling Mode Heating Mode Indoor air temperature Outdoor air Outdoor air 21 ℃DB 23 ℃DB 26 ℃DB 27 ℃DB 28 ℃DB 31 ℃DB 33 ℃DB Indoor air temperature temperature Air flow temperature...
  • Page 84 '20 • KX-T-373 FDTC22KXZE1-W (kW) (kW) Model Cooling Mode Heating Mode Indoor air temperature Outdoor air Outdoor air Indoor air temperature 21 ℃DB 23 ℃DB 26 ℃DB 27 ℃DB 28 ℃DB 31 ℃DB 33 ℃DB Air flow temperature Air flow temperature 14 ℃WB 16 ℃WB...
  • Page 85 '20 • KX-T-373 FDTC28KXZE1-W (kW) (kW) Model Cooling Mode Heating Mode Indoor air temperature Outdoor air Outdoor air Indoor air temperature 21 ℃DB 23 ℃DB 26 ℃DB 27 ℃DB 28 ℃DB 31 ℃DB 33 ℃DB Air flow temperature Air flow temperature 14 ℃WB 16 ℃WB...
  • Page 86 '20 • KX-T-373 FDTC36KXZE1-W (kW) (kW) Model Cooling Mode Heating Mode Indoor air temperature Outdoor air Outdoor air Indoor air temperature 21 ℃DB 23 ℃DB 26 ℃DB 27 ℃DB 28 ℃DB 31 ℃DB 33 ℃DB Air flow temperature Air flow temperature 14 ℃WB 16 ℃WB...
  • Page 87 '20 • KX-T-373 FDTC45KXZE1-W (kW) (kW) Model Cooling Mode Heating Mode Indoor air temperature Outdoor air Outdoor air Indoor air temperature 21 ℃DB 23 ℃DB 26 ℃DB 27 ℃DB 28 ℃DB 31 ℃DB 33 ℃DB Air flow temperature Air flow temperature 14 ℃WB 16 ℃WB...
  • Page 88 '20 • KX-T-373 FDTC56KXZE1-W (kW) (kW) Model Cooling Mode Heating Mode Indoor air temperature Outdoor air Outdoor air Indoor air temperature 21 ℃DB 23 ℃DB 26 ℃DB 27 ℃DB 28 ℃DB 31 ℃DB 33 ℃DB Air flow temperature Air flow temperature 14 ℃WB 16 ℃WB...
  • Page 89 '20 • KX-T-373 (3) Wall mounted type (FDK) FDK15KXZE1-W (kW) (kW) Model Cooling Mode Heating Mode Indoor air temperature Outdoor air Outdoor air 21 ℃DB 23 ℃DB 26 ℃DB 27 ℃DB 28 ℃DB 31 ℃DB 33 ℃DB Indoor air temperature temperature Air flow temperature...
  • Page 90 '20 • KX-T-373 FDK22KXZE1-W (kW) (kW) Model Cooling Mode Heating Mode Indoor air temperature Outdoor air Outdoor air Indoor air temperature 21 ℃DB 23 ℃DB 26 ℃DB 27 ℃DB 28 ℃DB 31 ℃DB 33 ℃DB temperature Air flow temperature Air flow 14 ℃WB 16 ℃WB 18 ℃WB...
  • Page 91 '20 • KX-T-373 FDK28KXZE1-W (kW) (kW) Model Cooling Mode Heating Mode Indoor air temperature Outdoor air Outdoor air Indoor air temperature 21 ℃DB 23 ℃DB 26 ℃DB 27 ℃DB 28 ℃DB 31 ℃DB 33 ℃DB temperature Air flow temperature Air flow 14 ℃WB 16 ℃WB 18 ℃WB...
  • Page 92 '20 • KX-T-373 FDK36KXZE1-W (kW) (kW) Model Cooling Mode Heating Mode Indoor air temperature Outdoor air Outdoor air Indoor air temperature 21 ℃DB 23 ℃DB 26 ℃DB 27 ℃DB 28 ℃DB 31 ℃DB 33 ℃DB temperature Air flow temperature Air flow 14 ℃WB 16 ℃WB 18 ℃WB...
  • Page 93 '20 • KX-T-373 FDK45KXZE1-W (kW) (kW) Model Cooling Mode Heating Mode Indoor air temperature Outdoor air Outdoor air 21 ℃DB 23 ℃DB 26 ℃DB 27 ℃DB 28 ℃DB 31 ℃DB 33 ℃DB Indoor air temperature temperature Air flow temperature Air flow 14 ℃WB 16 ℃WB 18 ℃WB...
  • Page 94 '20 • KX-T-373 FDK56KXZE1-W (kW) (kW) Model Cooling Mode Heating Mode Indoor air temperature Outdoor air Outdoor air 21 ℃DB 23 ℃DB 26 ℃DB 27 ℃DB 28 ℃DB 31 ℃DB 33 ℃DB Indoor air temperature temperature Air flow temperature Air flow 14 ℃WB 16 ℃WB 18 ℃WB...
  • Page 95 '20 • KX-T-373 FDK71KXZE1-W (kW) (kW) Model Cooling Mode Heating Mode Indoor air temperature Outdoor air Outdoor air 21 ℃DB 23 ℃DB 26 ℃DB 27 ℃DB 28 ℃DB 31 ℃DB 33 ℃DB Indoor air temperature temperature Air flow temperature Air flow 14 ℃WB 16 ℃WB 18 ℃WB...
  • Page 96 '20 • KX-T-373 FDK90KXZE1-W (kW) (kW) Model Cooling Mode Heating Mode Indoor air temperature Outdoor air Outdoor air 21 ℃DB 23 ℃DB 26 ℃DB 27 ℃DB 28 ℃DB 31 ℃DB 33 ℃DB Indoor air temperature temperature Air flow temperature Air flow 14 ℃WB 16 ℃WB 18 ℃WB...
  • Page 97 '20 • KX-T-373 3.7 Application data 3.7.1 Installation of indoor unit PJF012D057 ①B (1) Ceiling cassette-4 way type (FDT) ●Ins CAUTION ●Co This manual is for the installation of the indoor unit. ○ For electrical wiring work (Indoor unit), refer to page 113. For wired remote control installation, refer to ●...
  • Page 98 '20 • KX-T-373 2D057 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 ●Confirm the following points: ○For grid ceiling the hanging hardware (4 places) only, ○Unit type/Power supply specification with care not to apply forces to any other...
  • Page 99 '20 • KX-T-373 ⑤Refrigerant pipe (continued) ④Installation of indoor unit (continued) ⑥D ● 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 100 '20 • KX-T-373 ⑦Wiring-out position and wiring connection (continued) ⑥Drain pipe (continued) As wide as possible Wiring between indoor Indoor power ●When sharing a drain pipe for more than 1 Single Split (PAC) series VRF (KX) series (about100mm) and outdoor units source line Band Band...
  • Page 101 '20 • KX-T-373 PJF012D037 • Panel installation Read this manual together with the indoor unit’s installation manual. ⑤ Orientation of the panel installation ⑦ Ele Take note that there is an orientation to install the panel. The wiring WARNING Install the panel with the orientation shown on the right. The connec •...
  • Page 102 '20 • KX-T-373 ⑦ Electrical wiring ⑨ Installing the inlet grille To attach the inlet grille, follow the procedure described in ③ Removing the inlet grille in the reverse order. The wiring work varies depending on the panel type. Select the wiring work appropriate for the panel type. The connection positions of the indoor unit are as shown below irrespective of the panel type.
  • Page 103 '20 • KX-T-373 PJF012D512 ①B (2) Ceiling cassette-4 way compact type (FDTC) ●Ins CAUTION ●Co This manual is for the installation of the indoor unit. ○ For electrical wiring work (Indoor unit), refer to page 113. For wired remote control installation, refer to ●...
  • Page 104 '20 • KX-T-373 2D512 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 supply specification...
  • Page 105 '20 • KX-T-373 ⑤Refrigerant pipe (continued) ④Installation of indoor unit (continued) ⑥D ● 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 106 '20 • KX-T-373 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 107 '20 • KX-T-373 ・ Panel installation PJF012D503 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 108 '20 • KX-T-373 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 109 '20 • KX-T-373 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 110 '20 • KX-T-373 CHARACTERISTICS OF AIR FLOW IN DIVIDED DUCT FOR FDTC Models FDTC15, 22, 28, 36KXZE1-W 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 111 '20 • KX-T-373 (3) Wall mounted type (FDK) ① PHA012D408 This manual is for the installation of an indoor unit. For electrical wiring work (Indoor), refer to page 113. For wired remote control installation, refer to CAUTION page 117. For wireless kit installation, refer to page 311. For electrical wiring work (Outdoor) and refrigerant pipe work installation for outdoor unit, refer to page 12.
  • Page 112 '20 • KX-T-373 ① Before installation ③ Preparation before installation Front view for installing position and installing space UNIT: mm Install correctly according to the installation manual. Confirm the following points: Type 15−56 Indoor unit Unit type/Power supply specification Pipes/Wires/Small parts Accessory items Installation board (Service space)
  • Page 113 '20 • KX-T-373 4 Installation of indoor unit (continued) 6 Refrigerant pipe 1. A g Installation Steps Caution Fixing of indoor unit Pass the pipe through the hole ●Be sure to use new pipes for the refrigerant pipes. Use the flare nut attached to the product. 2.
  • Page 114 '20 • KX-T-373 8 Wiring-out position and wiring connection (continued) 7 Drain pipe (continued) 1. A general-purpose hard PVC pipe VP16 can be connected to the drain hose tip as a part of Address setting drain piping. Remove the front panel of indoor unit and the control cover, it is possible to change address setting. duct.
  • Page 115 '20 • KX-T-373 3.7.2 Electric wiring work instruction PSC012D118 ① Electrical wiring work must be performed by an electrician qualified by a local power provider according to For th the electrical installation technical standards and interior wiring regulations applicable to the installation site. ①...
  • Page 116 '20 • KX-T-373 AIR CON NO D118 ① Electrical Wiring Connection (continued) ③④ Operation and confirmation from remote control For the rated sensitivity current of leakage breaker, refer to the following equation and judgment method. Operation from the eco touch remote Operation from the standard remote AIR CON NO Item...
  • Page 117 '20 • KX-T-373 ⑥ Operation and setting from remote control ⑥ Op <Availability of setting/operation on standard remote controls> <Note of “eco-Touch Remote Control”> ○:Nearly same function setting and operations are possible. Blank column: Standard remote controls have not A : Refer to the instruction manual for RC-EX series C : Loading a utility software vie Internet Settin △:Similar function setting and opperations are possible.
  • Page 118 '20 • KX-T-373 ⑥ Operation and setting from remote control (continued) RC-EX RC-E Setting & display item Description series series Temp increment setting The temp increment setting can be changed by 0.5˚C or 1.0˚C. Set temp display Ways of displaying setting temperatures can be selected. ries 2 Administrator settings R/C display setting...
  • Page 119 '20 • KX-T-373 3.7.3 Installation of wired remote control (Option parts) P J Z 0 1 2 A 1 7 1 (1) 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...
  • Page 120 '20 • KX-T-373 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 121 '20 • KX-T-373 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 122 '20 • KX-T-373   2 . Accessories & Prepare on site Following parts are provided. Accessories R/C main unit, wood screw (φ3.5 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 100m, Item name Q’ty...
  • Page 123 '20 • KX-T-373   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 124 ブッ シング パテで シール する こ と '20 • KX-T-373 リ モコ ン配線 ③ r i w o r f s l a s l a t i n 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 125 '20 • KX-T-373   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 126 '20 • KX-T-373 PJA012D730 Installation manual for wired remote controller (2) Model RC-E5 Connect the remote cont terminal block. Connect the terminal of r Read together with indoor unit's installation manual. with the terminal of indoo WARNING (X and Y are no polarity) 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 depending on the pulling...
  • Page 127 '20 • KX-T-373 ote controller Connect the remote control cord to the Sheath The range of temperature settin Sheath 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 128 '20 • KX-T-373 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 129 '20 • KX-T-373 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 130 '20 • KX-T-373 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 131 '20 • KX-T-373 4. PIPING SYSTEM All models P C A 0 0 1 Z 9 0 3...
  • Page 132 '20 • KX-T-373 5. RANGE OF USAGE & LIMITATIONS System FDC121KXZEN1-W FDC140KXZEN1-W FDC155KXZEN1-W 121KXZES1-W 140KXZES1-W 155KXZES1-W Item Indoor intake air temperature (Upper, lower limits) Outdoor air temperature (Upper, lower limits) Indoor units Number of connected units 1 to 8 units...
  • Page 133 '20 • KX-T-373 Operating temperature range Cooling 43°CDB Usage range in cooling -15°CDB Indoor air temperature °CWB Heating Usage range in heating Outdoor air temperature °CWB Decline in cooling and heating capacity or operation stop may occur when the outdoor unit is installed in places where natural wind can increase or decrease its design air flow rate.
  • Page 134 '20 • KX-T-373 6. SELECTION CHART 4.4 Selection chart (1) Equipment selection flow (1) Equipment selection flow Calculate the load for each room separately, then determine the indoor load. Select an indoor unit that matches the indoor load (tentative). Calculate the temperature compensation, then calculate the indoor unit capacity.
  • Page 135 '20 • KX-T-373 (2) Capacity calculation method (a) Calculating the indoor unit capacity compensation Indoor unit capacity (cooling, heating) = Indoor unit total rated capacity × Capacity compensation coefficient according to temperature conditions See item (3) (a) concerning the capacity compensation coefficient according to temperature conditions. (b) Calculating the outdoor unit capacity compensation Outdoor Unit Capacity (Cooling, Heating) = Outdoor unit rated capacity (rated capacity when 100% connected) ×...
  • Page 136 '20 • KX-T-373 • Capacity compensation coefficient according to height difference: 0.97 (calculated according to 15 m difference); (See page 138) 13.1 kW × 0.97 . 12.7 kW • Capacity compensation coefficient according to indoor unit connected total capacity: 1.0 , (56 × 2) / 140 < 100%) No compensation <System cooling capacity>: Item (2) (c) calculation Compare the indoor unit total cooling capacity and the outdoor unit maximum cooling capacity.
  • Page 137 '20 • KX-T-373 <Outdoor unit maximum heating capacity> : Item (2) (b) calculation • Outdoor unit rated heating capacity: 14.0 kW • Capacity compensation coefficient according to temperature conditions: 0.98 (Calculated according to Outdoor 6˚C WB / Indoor 19˚C DB); (See page 136) Outdoor unit heating capacity: 14.0 kW ×...
  • Page 138 '20 • KX-T-373 SHeating 1.30 Ambient air WB temperature 15˚CWB 1.20 Ambient air WB temperature 10˚CWB 1.10 Ambient air WB temperature 20˚CWB 1.00 Ambient air WB temperature 5˚CWB 0.90 Ambient air WB temperature -5˚CWB 0.80 Ambient air WB temperature 0˚CWB Ambient air WB temperature -10˚CWB 0.70 Ambient air WB temperature -15˚CWB...
  • Page 139 '20 • KX-T-373 Heating Ambient air WB temperature -10˚CWB 1.20 Ambient air WB temperature -5˚CWB 1.10 1.00 0.90 0.80 0.70 Ambient air WB temperature 0˚CWB Ambient air WB temperature 5˚CWB 0.60 Ambient air WB temperature -15˚CWB Ambient air WB temperature -20˚CWB 0.50 Ambient air WB temperature 10˚CWB Ambient air WB temperature 15˚CWB...
  • Page 140 '20 • KX-T-373 (c) When the outdoor unit is located at a lower height than the indoor unit in cooling operation and when the outdoor unit is located at a higher height than the indoor unit in heating operation, the following values should be subtracted from the values in the above table.
  • Page 141 '20 • KX-T-373 ( f ) The capacity compensation coefficient: Cooling capacity in low temperature under operation of Anti-frost control. ( i ) Indoor fan tap: P-Hi Tota capacity of concurrently operating indoor unit : 20% Outdoor air DB temperature Total capacity of concurrently operating indoor unit : 40%, 50% Outdoor air DB temperature...
  • Page 142 '20 • KX-T-373 ( ii ) Indoor fan tap: Lo   Total capacity of concurrently operating indoor unit : 20%, 40%, 50% Outdoor air DB temperature (℃DB)   Total capacity of concurrently operating indoor unit :60%, 80% Outdoor air DB temperature (℃DB)  ...
  • Page 143 (100years) refrigerant Contact details Mitsubishi heavy industries thermal systems,LTD ** If Cdc is not determined by measurement then the default degradation coefficient air conditioners shall be 0,25. *** from 26 September 2018 Where information relates to multi-spilt air conditioners,the test result and performance data be obtained on the basis of the performance...
  • Page 144 (100years) refrigerant Contact details Mitsubishi heavy industries thermal systems,LTD ** If Cdh is not determined by measurement then the default degradation coefficient air conditioners shall be 0,25. *** from 26 September 2018 Where information relates to multi-spilt air conditioners,the test result and performance data be obtained on the basis of the performance...
  • Page 145 (100years) refrigerant Contact details Mitsubishi heavy industries thermal systems,LTD ** If Cdc is not determined by measurement then the default degradation coefficient air conditioners shall be 0,25. *** from 26 September 2018 Where information relates to multi-spilt air conditioners,the test result and performance data be obtained on the basis of the performance...
  • Page 146 (100years) refrigerant Contact details Mitsubishi heavy industries thermal systems,LTD ** If Cdh is not determined by measurement then the default degradation coefficient air conditioners shall be 0,25. *** from 26 September 2018 Where information relates to multi-spilt air conditioners,the test result and performance data be obtained on the basis of the performance...
  • Page 147 (100years) refrigerant Contact details Mitsubishi heavy industries thermal systems,LTD ** If Cdc is not determined by measurement then the default degradation coefficient air conditioners shall be 0,25. *** from 26 September 2018 Where information relates to multi-spilt air conditioners,the test result and performance data be obtained on the basis of the performance...
  • Page 148 (100years) refrigerant Contact details Mitsubishi heavy industries thermal systems,LTD ** If Cdh is not determined by measurement then the default degradation coefficient air conditioners shall be 0,25. *** from 26 September 2018 Where information relates to multi-spilt air conditioners,the test result and performance data be obtained on the basis of the performance...
  • Page 149 (100years) refrigerant Contact details Mitsubishi heavy industries thermal systems,LTD ** If Cdc is not determined by measurement then the default degradation coefficient air conditioners shall be 0,25. *** from 26 September 2018 Where information relates to multi-spilt air conditioners,the test result and performance data be obtained on the basis of the performance...
  • Page 150 (100years) refrigerant Contact details Mitsubishi heavy industries thermal systems,LTD ** If Cdh is not determined by measurement then the default degradation coefficient air conditioners shall be 0,25. *** from 26 September 2018 Where information relates to multi-spilt air conditioners,the test result and performance data be obtained on the basis of the performance...
  • Page 151 (100years) refrigerant Contact details Mitsubishi heavy industries thermal systems,LTD ** If Cdc is not determined by measurement then the default degradation coefficient air conditioners shall be 0,25. *** from 26 September 2018 Where information relates to multi-spilt air conditioners,the test result and performance data be obtained on the basis of the performance...
  • Page 152 (100years) refrigerant Contact details Mitsubishi heavy industries thermal systems,LTD ** If Cdh is not determined by measurement then the default degradation coefficient air conditioners shall be 0,25. *** from 26 September 2018 Where information relates to multi-spilt air conditioners,the test result and performance data be obtained on the basis of the performance...
  • Page 153 (100years) refrigerant Contact details Mitsubishi heavy industries thermal systems,LTD ** If Cdc is not determined by measurement then the default degradation coefficient air conditioners shall be 0,25. *** from 26 September 2018 Where information relates to multi-spilt air conditioners,the test result and performance data be obtained on the basis of the performance...
  • Page 154 (100years) refrigerant Contact details Mitsubishi heavy industries thermal systems,LTD ** If Cdh is not determined by measurement then the default degradation coefficient air conditioners shall be 0,25. *** from 26 September 2018 Where information relates to multi-spilt air conditioners,the test result and performance data be obtained on the basis of the performance...
  • Page 155 Total electric power input 0.020 rated,c elec Sound power level Cooling capacity (latent) 49.0 rated,c (per speed setting,if applicable) Heating capacity rated,h Contact details Mitsubishi heavy industries thermal systems,LTD FDT36KXZE1-W Model(s) : Item Symbol Vaiue Unit Item Symbol Vaiue Unit Cooling capacity (sensible) Total electric power input 0.030...
  • Page 156 0.140 rated,c elec Sound power level Cooling capacity (latent) 66.0 rated,c (per speed setting,if applicable) Heating capacity 16.0 rated,h Contact details Mitsubishi heavy industries thermal systems,LTD FDT160KXZE1-W Model(s) : Item Symbol Vaiue Unit Item Symbol Vaiue Unit Cooling capacity (sensible) 11.5...
  • Page 157 Total electric power input 0.030 rated,c elec Sound power level Cooling capacity (latent) 47.0 rated,c (per speed setting,if applicable) Heating capacity rated,h Contact details Mitsubishi heavy industries thermal systems,LTD FDTC22KXZE1-W Model(s) : Item Symbol Vaiue Unit Item Symbol Vaiue Unit Cooling capacity (sensible) Total electric power input 0.030...
  • Page 158 Total electric power input 0.020 rated,c elec Sound power level Cooling capacity (latent) 54.0 rated,c (per speed setting,if applicable) Heating capacity rated,h Contact details Mitsubishi heavy industries thermal systems,LTD FDK22KXZE1-W Model(s) : Item Symbol Vaiue Unit Item Symbol Vaiue Unit Cooling capacity (sensible) Total electric power input 0.020...
  • Page 159 Symbol Vaiue Unit Item Symbol Vaiue Unit Cooling capacity (sensible) Total electric power input 0.050 rated,c elec Sound power level Cooling capacity (latent) 61.0 rated,c (per speed setting,if applicable) Heating capacity 10.0 rated,h Contact details Mitsubishi heavy industries thermal systems,LTD...
  • Page 160 '16 • PAC-T-251 '20 • KX-T-373 1.10 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER 8. OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER 8.1 Remote control (Option parts) 1.10.1 Remote control (1) Wired remote control Wired remote control Model RC-EX3A Model RC-EX3A ⑤ LCD (with backlight) ③...
  • Page 161 '20 • KX-T-373 '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 162 '16 • PAC-T-251 '20 • KX-T-373 (2) Wireless remote control Wireless remote control Models RCN-E2, RCN-EK2 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 163 '16 • PAC-T-251 '20 • KX-T-373 1.10.2 Operation control function by the wired remote control 8.2 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 164 '16 • PAC-T-251 '20 • KX-T-373 ●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 165 '20 • KX-T-373 Model RC-E5 (1) Switching sequence of the operation mode switches of remote control COOL HEAT AUTO (2) 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 166 '16 • PAC-T-251 '20 • KX-T-373 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 167 '20 • KX-T-373 '16 • PAC-T-251 (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)   I n case of "Room temperature/Cooling < Indoor return air temperature" and "Outdoor temperature/Cooling < Outdoor air tem perature"...
  • Page 168 '20 • KX-T-373 '16 • PAC-T-251 (4) Timer operation (a) RC-EX3A (i) 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 169 '20 • KX-T-373 '16 • PAC-T-251 (5) 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) (b) Contents of operation...
  • Page 170 '20 • KX-T-373 '16 • PAC-T-251 (7) 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 (i) Louver control 1) T o operate the swing louver when the air-conditioner is operating, press the “Direction” button on the TOP screen of remote control.
  • Page 171 '20 • KX-T-373 '16 • PAC-T-251 (8) 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...
  • Page 172 '20 • KX-T-373 '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 173 '20 • KX-T-373 (11) Drain pump control (Except FDK) (a) 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 174 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 '20 • KX-T-373 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 175 '20 • KX-T-373 (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 176 Blue Blue '20 • KX-T-373 ■ 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 Operation ② Operation ③ Operation ④...
  • Page 177 '20 • KX-T-373 (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 178 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 '20 •...
  • Page 179 Operation permission Operation permission/ permission Operation( ) prohibition zone prohibition ( ※ ) Operation prohibition zone is determined by the OR judgment between CnT operation prohibition zone and CnTA '20 • KX-T-373 '16 • PAC-T-251 operation prohibition zone. (e) In case of CnT ③ operation permission/prohibition level > CnTA ② operation/stop pulse (21) Temporary stop input CnTA②...
  • Page 180 '16 • PAC-T-251 '20 • KX-T-373 (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 181 '20 • KX-T-373 (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 182 '20 • KX-T-373 (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 183 '20 • KX-T-373 '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 184 '20 • KX-T-373 8.4 Operation control function by the outdoor control (A) Normal control (1) Operation of major functional components under each operation mode Cooling/Dehumidifying Heating Operation mode Compressor Compressor All stop by Compressor Compressor All stop by Functional components remote control remote control Magnetic contactor for...
  • Page 185 '20 • KX-T-373 (c) Fan control during heating During heating, fan speed is controlled in accordance with the low pressure (sensed by PSL). (i) Initial fan speeds are as follows. • Outdoor fan initial speed during heating Model Speed All models 6th speed (ii) During normal operation, the speed is changed in accordance with the low pressure value.
  • Page 186 '20 • KX-T-373 (5) Protective control (a) Discharge pipe temperature control If the discharge pipe temperature exceeds 105°C, compressor speed is reduced to suppress the rising of discharge pipe temperature. (i) If the discharge pipe temperature sensor (Tho-D1) detects 115°C or higher for 2 seconds continuously, it makes compressor stopped.
  • Page 187 '20 • KX-T-373 • Current safe setting value Current safe value [A] Inverter primary (T-phase) current Inverter secondary current Power source Cooling Cooling Heating Heating 1-phase 3-phase 13.5 13.5 11.5 11.5 13.5 ③ Ending condition This control ends when the inverter’s T-phase current or secondary current drops below the current safe setting value minus 1 ampere for 3 minutes continuously or below the current safe setting value in the table shown above for 6 minutes continuously.
  • Page 188 '20 • KX-T-373 (B) Option controls Outdoor unit control settings can be changed with the DIP switch and 7-segment display PXX setting on the PCB. In changing settings in PXX on the 7-segment display panel, you can use SW8 (increasing a number shown on the 7-segment display panel: one’s place), SW9 (increasing a number shown on the 7-segment display panel: tens place) and SW7 (data write/enter) by pressing them for a prolonged time.
  • Page 189 '20 • KX-T-373 ② CnZ1 connector: Following functions can be selected by selecting with [P06] on 7-segment display. “0”: Operation output “1”: Error output “2”: Compressor ON output “3”: Fan ON output “4”: Oil return output “5”: Sprinkler output “6” - “9”: Spare (1) External input and demand input (a) Operation permission and prohibition modes (Note) With 7-segment display [P07]-[0]...
  • Page 190 '20 • KX-T-373 6) The operation status when changing from operation prohibition to operation permission can be set by 7-segment [P37]. [P37]=0: Operation stopped [P37]=1: Restart the indoor unit that was operating before the operation was prohibited. (b) Demand control (Note) With 7-segment [P07] = [1] 1) Demand control and normal operation are switched with the connector (CnS1) and the jumper wire (J13) on the outdoor unit PCB.
  • Page 191 (b) Sound level (Reference data) Sound pressure Sound pressure Silent mode Silent mode Silent mode Silent mode Model level for cooling level for heating setting 0 setting 1 setting 2 setting 3 dB(A) dB(A) dB(A) dB(A) dB(A) dB(A) FDC121KXZEN1-W FDC140KXZEN1-W FDC155KXZEN1-W FDC121KXZES1-W FDC140KXZES1-W FDC155KXZES1-W...
  • Page 192 1 setting 2 setting 3 dB(A) dB(A) dB(A) dB(A) dB(A) dB(A) FDC121KXZEN1-W FDC140KXZEN1-W FDC155KXZEN1-W FDC121KXZES1-W FDC140KXZES1-W FDC155KXZES1-W (c) Ending condition • When the starting conditions are not established (3) Outdoor fan snow protection control (a) This control is enabled/disabled by entering data into 7-segment display.
  • Page 193 '20 • KX-T-373 0: Operation output • When the outdoor unit operation mode is “Operation”, the external output relay is turned ON. (Note) The “Operation” includes not only compressor ON mode but also fan mode and thermostat OFF mode under the condition of remote control ON.
  • Page 194 '20 • KX-T-373 (b) If any operation mode other than the forcible mode is commanded from indoor unit, the following operations are performed depending on the 7-segment [P38]. [P38]=0 The mode unmatch message is displayed on the remote control or others and operation enters int the FAN operation mode.
  • Page 195 '20 • KX-T-373 (iii) If the cumulative compressor operation time under the pump down control totals 15 minutes (ending by time count up), it stops and initiates the following. ① Red LED: stays OFF ② ③ 7-segment display: No display ④...
  • Page 196 '20 • KX-T-373 Pump down external input Activate by 7-segment:[P75]=“1” Emergency call => External oper : Opened Gas leakage Alarm unit Pump down oper on <== (10) Outdoor operation mode On the standard models of 2-pipe system, the outdoor operation mode of Stop/Cooling/Heating is selected based on the information of indoor units, and then respective controls are performed.
  • Page 197 '20 • KX-T-373 ・ Priority of required major operation mode: i t a l a t i t a s t i larger. There is no renewed judgment for 10 minutes after a change on the operation mode. The judgment, however, is renewed in following cases. At the stop When the P01 setting is changed.
  • Page 198 '20 • KX-T-373 5) Reset of unmatched condition (Cooling/heating unmatched) When unmatch occurs among indoor units, it can be reset by either one of followings. If the operation mode of outdoor unit is matched with that of indoor unit. ① If the operation mode is changed to “Fan”...
  • Page 199: 7-Segment Display: E56

    '20 • KX-T-373 (C) Data output (1) 7-segment and operation data retention (a) 7-segment display Operation information is displayed for checking various operation data during test run and for helping malfunction diagnosis at servicing. Input data to microcomputer, contents of outdoor unit control, indoor unit registration information, or other, are mainly displayed on the 7-segment LED.
  • Page 200 '20 • KX-T-373 (ii) When the temperature is below -10.0°C for the display of discharge pressure saturated temperature and suction pressure saturated temperature, the fraction after decimal point is rounded up. (Because the range of 7-segment display is 3-digit.) (iii) Precedence of display ①...
  • Page 201 '20 • KX-T-373 (b) List of 7-segment displays Code No. Contents of display Data display range Minimum unit Remarks Error display [EXX] Caution [oPX] display [PdS][PdE][CHx][CHE] Special display [CHL][CHU][CHJ][CHO] and etc. Code No. Contents of data display Data display range Minimum unit Remarks <Sensor value, actuator information>...
  • Page 202 '20 • KX-T-373 Code Minimum Contents of data display Data display range Remarks unit Order of 100: 63H1-1 C30 Pressure switch – Order of 10: (Spare) (0: Close, 1: Open) Order of 1: (Spare) Order of 100: CnS1 C31 External input –...
  • Page 203 '20 • KX-T-373 Code Minimum Contents of data display Data display range Remarks unit C56 Target Fk 0 - 999 C57 Inverter 1 operation frequency command 0 - 130 C58 Demand ratio 0 - 100 1% C59 FMo1 Fan Speed command 0 - 999 10min C60 (Spare)
  • Page 204 '20 • KX-T-373 Code Minimum Contents of data display Data display range Remarks unit <Anomalous counter information> C70 Counter · Sensor wire disconnected 0 - 3 C71 Counter · High pressure protection 0 - 5 ③ Counter · Anomalous low pressure (During 0 - 5 operation)
  • Page 205 '20 • KX-T-373 Code Minimum Contents of data display Data display range Remarks unit <User setting> 0 : Invalid 0 : (Factory default) P00 Continuous heating operation control – 1 : Defrost interval extension control 0,1,2 2 : Continuous heating control 0: First unit's operation mode 0 : (Factory default) 1: Last unit's operation mode...
  • Page 206 '20 • KX-T-373 Code Minimum Contents of data display Data display range Remarks unit 0 : (Factory default) P37 Operation permission/ – Refer to (B)(1) prohibition setting 0 : (Factory default) P38 Forced cooling/ – Refer to (B)(6) heating operation setting 0 : (Factory default) P39 VTCC setting –...
  • Page 207 '20 • KX-T-373 (c) Saving of operation data Mainly for investigating causes of market claims, operation data are always saved in memory. If any trouble occurs, the data writing is stopped and only the operation data prior to the time when the trouble occurs are recorded. These data can be loaded to a PC via RS-232C connector of PCB and utilized for identifying causes.
  • Page 208 '20 • KX-T-373 Record data Code Write-in content Data write-in Number of Write-in unit Content range bytes Heating operation 1-speed Heating operation 2-speed Heating operation 3-speed Heating operation 4-speed Heating operation 5-speed Heating operation 6-speed Indoor unit 1 Demand frequency 0~255 1 Hz Indoor unit 1 Answer frequency...
  • Page 209: Tho-P1

    '20 • KX-T-373 <Outdoor unit indicate data> Code Record data Number of Write content Unit of write Content Data write range bytes 00: No error on outdoor unit Error code 00 - 99 – 01-99: All errors 00 – 3F: Outdoor Error existing unit address 00 - FF –...
  • Page 210 '20 • KX-T-373 Code Record data Unit of Number of Write content Content Data write range write bytes FM01 Fan speed command 0 - 65535 10min (Spare) EEVH1 opening degree 0 - 65535 1 pulse EEVSC opening degree 0 - 65535 1 pulse Compressor target cooling low 0.00 - 2.00...
  • Page 211 '20 • KX-T-373 Code Record data Unit of Number of Write content Content Data write range write bytes DIP switch [SW6] – – Bit0 (Spare) Bit1 (Spare) Bit2 (Spare) Bit3 (Spare) Bit4 (Spare) Bit5 (Spare) Bit6 (Spare) Bit7 (Spare) Jumper wire –...
  • Page 212 '20 • KX-T-373 Code Record data Unit of Number of Write content Content Data write range write bytes <Control status> Control status 0 - 2 – None Oil return Oil return ON Control status 0 - 3 – None Defrost condition Temperature condition Time condition Control status...
  • Page 213 '20 • KX-T-373 Code Record data Unit of Number Write content Content Data write range write of bytes <Protection control status> Protection control HP protection 1 Bit0 0: Normal, 1: Implementing Status 1 Compressor capacity control HP protection 2 Bit1 0: Normal, 1: Implementing Indoor EEV minimal opening control at heating stop...
  • Page 214 '20 • KX-T-373 Code Record data Unit of Number of Write content Content Data write range write bytes <Error counter information> Control status HP (63H1) anomaly counter 0 - 5 Control status LP anomaly counter while 0 - 5 running Control status LP anomaly counter while 0 - 5 stopping...
  • Page 215 '20 • KX-T-373 Code Record data Unit of Number Write content Content Data write range write of bytes <Other> <Indoor unit information> Bit0 (Spare) Bit1 (Spare) Bit2 (Spare) Bit3 (Spare) Bit4 (Spare) Bit5 (Spare) Bit6 (Spare) Bit7 (Spare) Registered indoor 1 – 8 operation 0 - 4 –...
  • Page 216 '20 • KX-T-373 Code Record data Unit of Number Write content Content Data write range write of bytes 112 Registered indoor 1 – 8 – – Bit0 Indoor 1 unmatch check error 0 : OFF, 1 : ON unmatch check error Bit1 Indoor 2 unmatch check error 0 : OFF, 1 : ON...
  • Page 217 External input Level/Pulse Defrost start temperature Normal/Cold region Notes (1) Jumper wires J13, J15 indicate short-circuit/open. (2) DIP switch SW’s indicate OFF/ON.  Model selection with SW3-2, SW4-1 – SW4-4 Model FDC121KXZEN1-W FDC121KXZES1-W FDC140KXZEN1-W FDC140KXZES1-W FDC155KXZEN1-W FDC155KXZES1-W Switch SW3-2 SW4-1 SW4-2 SW4-3...
  • Page 218 '20 • KX-T-373 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 219 '20 • KX-T-373 9.2 Explanation of troubleshooting • Inspection of short-circuit on the power transistor module terminals Disconnect the wiring of compressor, P and N (TB5-9 in inverter PCB) and check for short-circuit with a tester. Inspect between terminals of: P-U, P-V, P-W, N-U, N-V, N-W and P-N (Replace the P and N as P3 and N3 respectively in single phase model.) Terminal (+) Terminal (-)
  • Page 220 '20 • KX-T-373 9.3 Contents of troubleshooting (a) List of inspection displays 1) Indoor and outdoor units Remote 7-segment control Name of inspection Classification Page display error code None Operates but does not cool System error None Operates but does not heat System error None Earth leakage breaker activated...
  • Page 221 '20 • KX-T-373 Remote 7-segment control Name of inspection Classification Page display error code Outdoor DC fan motor anomaly DC fan motor error Low pressure error System error Suction pipe temperature sensor anomaly (Tho-S) Sensor wire breakage High pressure sensor anomaly (PSH)/Low pressure sensor Sensor wire breakage anomaly (PSL) Power transitor temperature sensor anomaly (Tho-P1)
  • Page 222 '20 • KX-T-373 (b) Troubleshooting Troubleshooting Green Error code Content Keeps flashing Stays Off Indoor None Remote control: Operates but does not cool 7-segment display: 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 It is normal.
  • Page 223 '20 • KX-T-373 Green Error code Content Keeps flashing Stays Off Indoor Remote control: None Operates but does not heat 7-segment display: 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 It is normal.
  • Page 224 '20 • KX-T-373 Green Error code Content Stays Off Stays Off Indoor Remote control: None Earth leakage breaker activated 7-segment display: Stays Off Stays Off Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the checked result of insulation resistance Replace compressor.
  • Page 225 '20 • KX-T-373 Green Error code Content – – Indoor Remote control: None Excessive noise/vibration (1/3) 7-segment display: – – 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...
  • Page 226 '20 • KX-T-373 Green Error code Content – – Indoor Remote control: None Excessive noise/vibration (2/3) 7-segment display: – – Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure From 1/3 Rearrange the piping to Are the pipes avoid contact with the contacting with the casing.
  • Page 227 '20 • KX-T-373 Green Error code Content – – Indoor Remote control: None Excessive noise/vibration (3/3) 7-segment display: – – Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure From 2/3 If insufficient cooling [Adjustment heating problem happens during commissioning] due to anomalous operating Does noise/vibration occur when the conditions at cooling...
  • Page 228 '20 • KX-T-373 Green Content Error code Louver motor anomaly Keeps flashing Stays OFF Indoor None Remote control: 7-segment display : 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 229 '20 • KX-T-373 Green Error code Content Power source system anomaly Stays OFF Stays OFF Indoor Remote control: None (Power source to indoor unit PCB) 7-segment display: Stays OFF Outdoor 5. Troubleshooting 1. Applicable model FDT, FDTC, FDK series only Diagnosis Countermeasure AC 220-240V...
  • Page 230 '20 • KX-T-373 Green Error code Content Power source system anomaly Stays OFF Indoor Remote control: None (Power source to remote control) 7-segment display: Outdoor 5. Troubleshooting 1. Applicable model FDT, FDTC, FDK series only Diagnosis Countermeasure Is the connection of the Correct.
  • Page 231 '20 • KX-T-373 Green Error code Content Remote control: Indoor Keeps flashing Stays Off /Searching IU /Searching IU (1) WAIT WAIT 7-segment display: Outdoor 5. Troubleshooting 1. Applicable model Remote control and indoor units Diagnosis Countermeasure (In case that WAIT /Searching IU is kept on displaying on the remote control /Searching IU is...
  • Page 232 '20 • KX-T-373 Green Content Error code Keeps flashing Stays OFF Indoor Remote control: WAIT WAIT 7-segment display: 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 233 '20 • KX-T-373 Green Content Error code Keeps flashing Stays OFF Indoor Remote control: WAIT WAIT 7-segment display: 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 234 '20 • KX-T-373 Green Error code Content Stays OFF Stays Off Indoor 〔 No display 〕 Remote control: [No display] 7-segment 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 235 '20 • KX-T-373 Green Error code Content Remote control Stays Off Indoor Remote control: communication error 7-segment display: Stays Off Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is it possible to Malfunction by noise reset normally by the power Check peripheral source reset? environment.
  • Page 236 '20 • KX-T-373 Green Error code Content Keeps flashing Keeps flashing Indoor Remote control: Duplicated indoor unit address 7-segment display: 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 237 '20 • KX-T-373 Green Error code Content Keeps flashing 2 times flash Indoor Remote control: E3/5 Outdoor unit signal line error 7-segment display: 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 238 '20 • KX-T-373 Green Error code Content Keeps flashing *See below Indoor Remote control: Communication error during operation 7-segment display: Keeps flashing 2 time flash Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure * In case that indoor unit red LED flashes 2 times Note (1) Check the connection (disconnection, looseness) of signal wires at outdoor unit terminal block Is the...
  • Page 239 '20 • KX-T-373 Green Indoor unit heat exchanger Content Error code Keeps flashing 1-time flash Indoor Remote control: temperature sensor anomaly (Thi-R) 7-segment display: Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure the connector of Insert the connector temperature sensor securely.
  • Page 240: Sensor Anomaly (Tho-P1)

    '20 • KX-T-373 Green Indoor return air Content Error code Keeps flashing 1-time flash Indoor Remote control: temperature sensor anomaly (Thi-A) 7-segment display: Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure the connector of Insert the connector temperature sensor connected...
  • Page 241 '20 • KX-T-373 Green Error code Content Keeps flashing 1 time flash Indoor Remote control: Drain trouble 7-segment display: Keeps flashing Stays Off Outdoor 5. Troubleshooting 1. Applicable model FDT and FDTC series Diagnosis Countermeasure Check the error data in the remote control. Is there any overflow? Is DC 12V detected at CnI...
  • Page 242 '20 • KX-T-373 Green Error code Content Excessive number of indoor units (more than 17 units) Keeps flashing Stays Off Indoor Remote control: by controlling one remoto control 7-segment display: Keeps flashing Stays Off Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure...
  • Page 243 '20 • KX-T-373 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 7-segment display: Keeps flashing Stays OFF Outdoor...
  • Page 244 '20 • KX-T-373 Green Content Error code Address setting error Keeps flashing Keeps flashing Indoor Remote control: by mixed setting method 7-segment display: Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the automatic setting and Review address setting.
  • Page 245 '20 • KX-T-373 Green Content Error code Indoor DC fan motor anomaly Keeps flashing 1-time flash Indoor Remote control: 7-segment display: Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model FDT, FDTC, FDK series only Diagnosis Countermeasure Does any foreign material Remove foreign material.
  • Page 246 '20 • KX-T-373 Green Error code Content Indoor unit operation check, Keeps flashing 1 time flash Indoor Remote control: drain pump motor check mode anomaly 7-segment display: Keeps flashing Stays Off Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure E19 occurs when the power ON...
  • Page 247 '20 • KX-T-373 Green Content Error code Indoor DC fan motor rotation Keeps flashing 1-time flash Indoor Remote control: speed anomaly 7-segment display: Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model FDT, FDTC, FDK series only Diagnosis Countermeasure Does any foreign material Remove foreign material.
  • Page 248 '20 • KX-T-373 Green Content Error code Remote control Keeps flashing Stays OFF Indoor Remote control: temperature sensor anomaly (Thc) 7-segment display: Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure the connector of Insert the connector temperature sensor connected securely.
  • Page 249 ‘20 • KX-T-373 '20 • KX-T-373 Green Error code Content Keeps flashing Stays Off Indoor Remote control: EEVKIT False connection detection 7-segment display: Keeps flashing 1 time flash Outdoor 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure Reset the power source. E30 is displayed.
  • Page 250: Check And Save The Data Of Operating Condition

    '20 • KX-T-373 Green Error code Content Stays Off Indoor Remote control: Duplicated outdoor unit address No. 7-segment display: Outdoor 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure Check and save the data of operating condition. Check the conditions whether it occurs immediately after the power Save data for 30 minutes before...
  • Page 251: Pcb

    '20 • KX-T-373 Green Open L3 Phase on Error code Content power source at primary side Keeps flashing Stays Off Indoor Remote control: (3 phase model only) 7-segment display: Keeps flashing 1 time flash Outdoor 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure...
  • Page 252 '20 • KX-T-373 Green Error code Content Discharge pipe temperature Stays Off Indoor Remote control: error (Tho-D1) 7-segment display: Outdoor 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure Check and save the data of operating condition. Save data for 30 minutes before stopping in Mente PC. Check the ROM version.
  • Page 253 '20 • KX-T-373 Outdoor unit heat exchanger Green Error code Content temperature sensor (Tho-R) and subcooling coil Keeps flashing Stays Off Indoor Remote control: temperature sensor (Tho-SC,-H) anomaly 7-segment display: Keeps flashing Outdoor *1 One time flash (Tho-R), 5 time flash (Tho-SC), 6 time flash (Tho-H) 5.
  • Page 254 '20 • KX-T-373 Green Error code Content Outdoor air temperature Keeps flashing Stays Off Indoor Remote control: sensor anomaly (Tho-A) 7-segment display: Keeps flashing 1 time flash Outdoor 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure Check and save the data of operating condition.
  • Page 255 '20 • KX-T-373 Green Error code Content Discharge pipe temperature Keeps flashing Stays Off Indoor Remote control: sensor anomaly (Tho-D1) 7-segment display: Keeps flashing 1 time flash Outdoor 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure Check and save the data of operating condition.
  • Page 256 '20 • KX-T-373 Green Error code Content High pressure anomaly Keeps flashing Stays Off Indoor Remote control: (63H1-1 activated) 7-segment display: Keeps flashing 1 time flash Outdoor 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure Check and save the data of operating condition.
  • Page 257 '20 • KX-T-373 Green Error code Content Stays Off Indoor Remote control: Current cut (1) 7-segment display: Outdoor 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure Is the Check power source. power source voltage OK? 2. Error detection method Are the Open the valves.
  • Page 258 '20 • KX-T-373 '20 • KX-T-373 Green Error code Content Stays Off Indoor Remote control: Current cut (2) 7-segment display: Outdoor 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure Continue from previous page Single phase model Three phase model Is DC15V output OK? Replace control PCB.
  • Page 259 '20 • KX-T-373 Excessive number of indoor units Green Error code Content connected, excessive total capacity of connection, Stays Off Indoor Remote control: communication error from outdoor unit to indoor unit 7-segment display: Stays Off*1 Outdoor 2 times flash : Excessive total capacity of connection, 3 time flash : Communication error from outdoor unit to indoor unit 5.
  • Page 260 '20 • KX-T-373 Green Error code Content Stays Off Indoor Remote control: 7-segment display: 1 time flash Outdoor 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure Check and save the data of operating condition. Save data for 30 minutes before stopping in Mente PC. Check ROM version.
  • Page 261 '20 • KX-T-373 Green Error code Content Communication error between Stays Off Indoor Remote control: inverter PCB and outdoor unit control PCB(1) 7-segment display: Outdoor 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure Check and save the data of Save data for 30 minutes before stopping in Mente PC.
  • Page 262 '20 • KX-T-373 '20 • KX-T-373 Green Error code Content Communication error between Stays Off Indoor Remote control: inverter PCB and outdoor unit control PCB (2) 7-segment display: Outdoor 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure In case of: LED on inverter PCB stays OFF [For single phase model] From previous page.
  • Page 263 '20 • KX-T-373 Green Error code Content Mixed address setting methods Stays Off Indoor Remote control: coexistent in same network 7-segment display: Stays Off Outdoor 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure Check and save the data of operating condition.
  • Page 264 '20 • KX-T-373 '20 • KX-T-373 Green Error code Content Stays Off Indoor Remote control: Outdoor DC fan motor anomaly 7-segment display: Outdoor 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure Check and save the data of operating conditions. Save data for 30 minutes before stopping in Mente PC.
  • Page 265 '20 • KX-T-373 Green Error code Content Stays Off Indoor Remote control: Low pressure error 7-segment display: Outdoor 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure Check and save the data of operating condition. Save data for 30 minutes before stopping in Mente PC. Check error status.
  • Page 266: Characteristics Of Sensor Ok?

    '20 • KX-T-373 Green Error code Content Suction pipe temperature sensor anomaly Stays Off Indoor Remote control: (Tho-S) 7-segment display: Outdoor 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure Check and save the data of operating condition. Save data for 30 minutes before stopping in Mente PC. Check the conditions whether it occurs immediately after the...
  • Page 267 '20 • KX-T-373 Green Error code Content High pressure sensor anomaly (PSH) / Keeps flashing Stays Off Indoor Remote control: 7-segment display: Low pressure sensor anomaly (PSL) Keeps flashing Outdoor *1 1 time flash (PSL), 2 time flash (PSH) 5. Troubleshooting 1.
  • Page 268: Table Of Contents

    '20 • KX-T-373 Green Error code Content Power transitor temperature Keeps flashing Stays Off Indoor Remote controller: sensor anomaly (Tho-P1) 7-segment display: Keeps flashing 1 time flash Outdoor 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure Check and save the data of operating condition.
  • Page 269 ‘19 • KX-T-373 '20 • KX-T-373 Green Error code Content Anomalous compressor Keeps flashing Stays Off Indoor Remote control: by loss of synchronism 7-segment display: Keeps flashing 1 time flash Outdoor 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure Check and save the data of operating condition.
  • Page 270 '20 • KX-T-373 Green Error code Content Stays Off Indoor Remote control: Compressor startup failure 7-segment display: Outdoor 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure Check and save the data of Save data for 30 minutes before stoopping in Mente PC. operating conditions.
  • Page 271 '20 • KX-T-373 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 Indoor unit Diagnosis Countermeasure Check and save the data of operating conditions. Save data for 30 minutes before stopping in Mente PC Check the conditions whether it occurs...
  • Page 272 '20 • KX-T-373 9.4 Outdoor unit control PCB replacement procedure PCA012D098 (a) Control PCB Precautions for Safety Since the following precaution is the important contents for safety, be sure to observe them. ・ WARNING and CAUTION are described as follows: !...
  • Page 273 '20 • KX-T-373 (b) Invereter PCB PCA012D025K 1) FDC121, 140, 155KXZEN1-W model Precautions for Safety Since the following precaution is the important contents for safety, be sure to observe them. ・ WARNING and CAUTION are described as follows: ! WARNING Indicates an imminently hazardous situation which will result in death or serious injury if proper safety procedures and instructions are not adhered to.
  • Page 274 '20 • KX-T-373 After elapsing 3 minutes *Presence and shape of electric component from power OFF may vary according to model. Confirm the voltage (DC) is under 30 V N.F. PCB Control PCB between No.1 and No.3 on CNA1 White wiring CNQ1 CNN1 Band...
  • Page 275 '20 • KX-T-373 2. Exchange 2.1 Remove the screw from support panel and rotate the support panel to counterclockwise direction as shown in Fig.5. (By doing so, you can see the locking spacer of the inverter PCB.) 2.2 Disconnect the connectors and round terminals, and remove the screws on the IPM (IC2) as shown in (D) in Fig.6. 2.3 Remove the inverter PCB.
  • Page 276 '20 • KX-T-373 *Presence and shape of electric component Parts No. may vary according to model. TB10 TB11 CNCAN CNI2 ** CNACT1 **TB9 CNI4 ** **TB8 **TB7 Connectors are not ** These connectors and round terminals JSW11 half inserted JSW10 are disconnected in 1.8.
  • Page 277 '20 • KX-T-373 2) FDC121, 140, 155KXZES1-W model PCA012D025F a) Exchange the PCB after elapsing 3 minutes from power OFF. (Be sure to measure voltage (DC) on both capacitor terminals located in control back, and check that the voltage is discharged sufficiently.(Refer to Fig.2)) b) Take off the connection of inverter PCB terminal block connector and remove the screw of power transistor then c) Refer to table1 for the setting of switch (JSW10,11) of new PCB.
  • Page 278 '20 • KX-T-373 ■Function of DIP switch for contol (SW3, 4, 5) • SW3 (Function setting) • SW4 (Power source voltage) FDC121KXZEN1-W FDC121KXZES1-W Switch Function Model FDC140KXZEN1-W FDC140KXZES1-W Switch Inspection LED reset FDC155KXZEN1-W FDC155KXZES1-W SW3-1 Normal SW4-4 Forced cooling/heating • SW4 (Change demand ratio)
  • Page 279 '20 • KX-T-373 ■ Inverter checker for diagnosis of inverter output ● Checking method (a) Setup procedure of checker. 1) Power OFF (Turn off the breaker). 2) Remove the terminal cover of compressor and disconnect the wires (U, V, W) from compressor. 3) Connect the wires U (Red) , V (White) and W (Black) of checker to the terminal of disconnected wires (U, V, W) from compressor respectively.
  • Page 280 '20 • KX-T-373 9.5 Indoor unit control PCB replacement procedure PSC012D050B (1) FDT, FDTC series 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 281 '20 • KX-T-373 (2) FDK series PHA012D050AA (a) FDK15-56KXZE1-W SAFETY PRECAUTIONS SAFETY PRECAUTIONS ● ● Read the "SAFETY PRECAUTIONS" carefully first of all and then strictly follow it during the replacement in order to protect yourself. Read the "SAFETY PRECAUTIONS" carefully first of all and then strictly follow it during the replacement in order to protect yourself. ●...
  • Page 282 '20 • KX-T-373 PHA012D051AA (b) FDK71KXZE1-W SAFETY PRECAUTIONS SAFETY PRECAUTIONS ● ● Read the "SAFETY PRECAUTIONS" carefully first of all and then strictly follow it during the replacement in order to protect yourself. Read the "SAFETY PRECAUTIONS" carefully first of all and then strictly follow it during the replacement in order to protect yourself. ●...
  • Page 283 '20 • KX-T-373 (3) Indoor PCB setting 10.4 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 284 '20 • KX-T-373 10. OUTDOOR UNIT DISASSEMBLY PROCEDURE 6. OUTDOOR UNIT DISASSEMBLY PROCEDURE PCA012D088 DISASSEMBLY PROCEDURE Precautions for safety Read these "Precautions for safety" carefully before starting disassembly work and do it in the proper way. When disassembling, be sure to turn off the power. When disassembling the electrical components, check the electrical wiring diagram. The electrical components are under high voltage by the operation of the booster capacitor.
  • Page 285 '20 • KX-T-373 PROCEDURE & PICTURES 9. To remove the compressor (CM) (1) Remove the service panel.(See No.1) (2) Remove the insulation which covers compressor. (Strings (a) (c) should be loosen.) (3) Remove the terminal cover fixing bolt and remove it, and disconnect the power wiring. (4) Remove welded part of compressor by welding.
  • Page 286 '20 • KX-T-373 11. INDOOR UNIT DISASSEMBLY PROCEDURE PJF012D045 . INDOOR UNIT DISASSEMBLY PROCEDURE (1) FDT series DISASSEMBLY PROCEDURE Precautions for safety Read these "Precautions for safety" carefully before starting disassembly work and do it in the proper way. When disassembling, be sure to turn off the power. When disassembling the electrical components, check the electrical wiring diagram. The electrical components are under high voltage by the operation of the booster capacitor.
  • Page 287 '20 • KX-T-373 PROCEDURE & PICTURES Pipe lid To remove the heat exchanger assembly (1) Remove the drain pan.(See No.4) (2) Remove 2 pipe lid fixing screws and remove it.( mark) (3) Remove 3 heat exchanger assembly fixing screws and remove it.( mark) Coil of EEV 8.
  • Page 288 '20 • KX-T-373 (2) FDTC series PJA012D792A PJA012D792A DISASSEMBLY PROCEDURE Precautions for safety Read these "Precautions for safety" carefully before starting disassembly work and do it in the proper way. ● When disassembling, be sure to turn off the power. When disassembling the electrical components, check the electrical wiring diagram. ●...
  • Page 289 '20 • KX-T-373 PJA012D792A PROCEDURE & PICTURES 6. To remove the temperature sensors (example"Thi-R1") (1) Remove the lid of control box.(See No.1) (2) Disconnect the temperature sensors connector(CNNx). (3) Remove the drain pan.(See No.3) (4) Pull out the temperature sensors "Thi-R1" from the sensor holder. 7.
  • Page 290 '20 • KX-T-373 (3) FDK series PHA012D402...
  • Page 291 '20 • KX-T-373 [Removing the Control] Screw the control toward right...
  • Page 292 '20 • KX-T-373...
  • Page 293 '20 • KX-T-373...
  • Page 294 '20 • KX-T-373 (4) Panel PSC012D109A PSC012D109A DISASSEMBLY PROCEDURE Precautions for safety Read these "Precautions for safety" carefully before starting disassembly work and do it in the proper way. ● When disassembling, be sure to turn off the power. When disassembling the electrical components, check the electrical wiring diagram. ●...
  • Page 295 '20 • PAC-T-352 '20 • KX-T-373 5. WIRELESS KIT FDT series(RCN-T-5BW-E2, RCN-T-5BB-E2) 12. OPTION PARTS (1) Specification 12.1 Wireless kit (1) FDT series(RCN-T-5BW-E2, RCN-T-5BB-E2) (a) Specification Installation position of wireless kit Installation of wireless kit Receiver Do not install the wireless kit at the following places in order to avoid malfunction.
  • Page 296 '20 • KX-T-373 5.1 WIRELESS KIT (RCN-T-5AW-E2) (b) Installation manual Notes: ● 1.Following function of FDT indoor unit series are not able to be set with this wireless remote control. • Individual flap control system ● PJF012D035 2.This wireless remote control can operate the prevention function without connecting the wired remote control. PJF012D035C Safety precautions ●...
  • Page 297 '20 • KX-T-373 WARNING ● Do not wash the unit with water. ● Use the cables for wiring, and connect them securely with care to protect 2D035 electronic parts from external forces. ● When installing the unit at a hospital, telecommunication facility, etc., take measures to suppress electric noises.
  • Page 298 It could cause electric shocks. '20 • KX-T-373 ③ ② Preparation before installation (continued) To change setting Master/Slave setting when using Installat plural remote controls 1. Remove the cover by unscrewing two screws from the back of receiver. 2. Change the setting by the switch on PCB. ①...
  • Page 299 '20 • KX-T-373 ③ How to install the receiver(continued) n using Installation of the receiver ① ② Put the wiring of the receiver through the opening. ol can indoor ③ Put the wiring on the notch on the control box so as not to be pinched by the control box and lid as shown below.
  • Page 300 '20 • KX-T-373 ④ ④ Wireless remote control 2. Setti Installation tips for the remote control holder Fix the remote control holder using the screws supplied with this product. Button * Precautions for installing the holder FAN SPEE Holder for ●...
  • Page 301 '20 • KX-T-373 ④ Wireless remote control (continued) 2. Setting details The following functions can be set. Button Number indicator Function setting Fan speed setting : Standard FAN SPEED Fan speed setting : Setting 1 * control Fan speed setting : Setting 2 * Room heating temperature adjustment : Disable Room heating temperature adjustment : +1°C MODE...
  • Page 302 '20 • KX-T-373 ⑤ ⑤ Receiver 2. Corre 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 d Standard Within 0.3 mm²...
  • Page 303 '20 • KX-T-373 ⑤ Receiver (continued) 2. Correlation between illuminance at the receiver The receivable area of the h of wire and reachable area of the signal in a plain view. signal when the illuminance 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...
  • Page 304 '20 • KX-T-373 '20 • PAC-T-352 5. WIRELESS KIT FDTC series(RCN-TC-5AW-E3) (2) FDTC series(RCN-TC-5AW-E3) (1) Specification (a) Specification Installation position of wireless kit Installation of wireless kit Receiver Do not install the wireless kit at the following places in order to avoid malfunction. (1)Places exposed to direct sunlight (2)Places near heat-generating devices (3)High humidity places...
  • Page 305 PJF012D506 '20 • KX-T-373 (b) Installation manual PJF012D506B 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 306 '20 • KX-T-373 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 307 '20 • KX-T-373 ② 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 308 '20 • KX-T-373 ③ 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...
  • Page 309 '20 • KX-T-373 ④ 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 •...
  • Page 310 '20 • KX-T-373 ④ Wireless remote control (continued) 2. Setting details The following functions can be set. Button Number indicator Function setting Fan speed setting : Standard FAN SPEED Fan speed setting : Setting 1 * Fan speed setting : Setting 2 * Room heating temperature adjustment : Disable Room heating temperature adjustment : +1°C MODE...
  • Page 311 '20 • KX-T-373 ⑤ 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.
  • Page 312 '20 • KX-T-373 ⑤ 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 313 PHA012D049 WIRELESS REMOTE RCN-K-E2 '20 • KX-T-373 RCN-K71-E2 201612 CONTROLLER&RECEIVER (3) FDK series (RCN-K-E2∙RCN-K71-E2) INSTALLATION MANUAL PHA012D049 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. WARNING Failure to follow these instructions properly may result in serious consequences such as death, severe injury, etc.
  • Page 314 '20 • KX-T-373 WARNING 01612 ● Do not wash the unit with water. It could cause electric shocks, or break-down. ● Use the cables for wiring, and connect them securely with care to protect electronic parts from external forces. Improper connections or could cause heat generation, etc.
  • Page 315 '20 • KX-T-373 ② Preparation before installation Setting on site Prevents interference ON : Normal OFF : Customized during plural setting Receiver master/slave PCB on the receiver has the ON : Master OFF : Slave setting following switches to set the function. Buzzer ON : Valid OFF : Invalid...
  • Page 316 '20 • KX-T-373 ③ How to install the receiver (continued) ② Install Display-Assy on Indoor unit (a) Remove the control cover, and then louver wiring can be removed to CnJ1 on the PCB. (b) Remove the louver wiring hanging on display holder. (c) Remove the latches of display holder and then display holder can be removed.
  • Page 317 '20 • KX-T-373 ③ ③ ④ How to install the receiver (continued) How to install the receiver (continued) In the case of right-hand-side piping In the case of Right-hand-side piping Display-Assy Display-Assy Display Assy Display Assy disa To d butt Control-Assy Control-Assy * No...
  • Page 318 '20 • KX-T-373 ④ Wireless remote control (continued) Changing the remote control setting How to change the Auto Run setting The Auto Run mode is not available on the building air-conditioning and gas heat pump series (excluding the cooling/heating free multi system). When using the remote control to operate those models, set the remote control to disable the Auto Run mode.
  • Page 319 Cutting Cutting '20 • KX-T-373 ⑤ ⑤ Receiver (continued) 3. Set the indoor unit and outdoor unit numbers by manually specifying the addresses. Use the rotary switchs SW1 and SW2 provided on the indoor unit PCB (printed circuit board) to set the indoor unit numbers so that they are not duplicated.
  • Page 320 '20 • KX-T-373 ⑤ Receiver (continued) Backup button A backup switch is provided on the receiver section of the panel surface. When operation from the wireless remote control unit is not possible (due to flat batteries, a mislaid unit, a unit failure), you can use it as an emergency means.
  • Page 321 '20 • KX-T-373 '20 • PAC-T-352 12.2 Motion sensor kit 6. MOTION SENSOR KIT (1) FDT series(LB-T-5BW-E, LB-T-5BB-E) FDT series(LB-T-5BW-E, LB-T-5BB-E) (a) Specification (1) Specification Motion sensor kit Installation position of motion sensor kit Motion sensor Refrigerant pipe Drain pipe Note (1) Motion sensor must be installed to the position as shown.
  • Page 322 PJF012D036 '20 • KX-T-373 201609 (b) Installation manual PJF012D036 WARNING Inst ● Connect the wiring to the PCB in the control box on the indoor unit and hold the wiring ① Loo securely so as not to apply unexpected stress on the PCB. ②...
  • Page 323 Motion sensor '20 • KX-T-373 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 Detectable scope①...
  • Page 324 D036 201609 '20 • KX-T-373 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 325 '20 • KX-T-373 '20 • PAC-T-352 6. MOTION SENSOR KIT (2) FDTC series(LB-TC-5W-E) (a) Specification FDTC series(LB-TC-5W-E) (1) Specification Motion sensor kit Installation position of motion sensor kit Motion sensor Drain pipe Refrigerant pipe Note (1)Motion sensor must be installed to the position as shown.
  • Page 326 PJF012D504 '20 • KX-T-373 (b) Installation manual 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 327 Motion sensor '20 • KX-T-373 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 328 12D504 '20 • KX-T-373 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 329 '20 • KX-T-373 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 330 '20 • KX-T-373 12.2 Motion sensor kit (LB-KIT2) (3) FDK series(LB-KIT2) (a) Specification PJZ000Z341 (1) Specification PJZ000Z341 External dimensions Case of wiring out to the side face, cut thin wall part Case of wiring out to the back φ15 (Ciling hole) Wiring pass hole Switch box Lockscrew of cover...
  • Page 331 '20 • KX-T-373 Installation precautions Do not install the motion sensor kit at the following places in order to avoid malfunction. (1) Places exposed to direct sunlight (2) Places near heat devices (3) High humidity places (4) Hot surface or cold surface enough to generate condensation (5) Places exposed to oil mist or steam directly (6) Uneven surface (7) Places affected by the direct air flow of the AC unit...
  • Page 332 '20 • KX-T-373 (b) Installation manual PJZ012D134 WARNING ● Connect the wiring to the PCB in the control box on the indoor unit and hold the wiring securely so as not to apply unexpected stress on the PCB. ● Make sure the power source is turned off when electric wiring work. Otherwise, electric shock, malfunction and improper running may occur.
  • Page 333 '20 • KX-T-373 Installing the motion sensor • The recommended height is lower than 4000mm for motion sensor. When the installation height is higher, motion detection accuracy might be reduced. • Sensor will detect the object with a different temperature from the surrounding. •...
  • Page 334 '20 • KX-T-373 Option (A) Ceiling plane strength to install the motion sensor directly with screws. ① Prepare a relay wiring on site and lay out the wiring in advance. ② Remove the screw at the side of the motion sensor Relay wiring φ15 hole (prepare on site)
  • Page 335 '20 • KX-T-373 Option (B) screws. ① Remove the screw at the side of the motion sensor and slide the upper case in the direction of the arrow. ② (The same as of Option (A)) ② Pull the wiring of the motion sensor toward the side. Cut off the thinner part of the upper case. Lower case Thinner part Upper case...
  • Page 336 '20 • KX-T-373 ② Remove the screw at the side of the motion sensor and slide the upper case in the direction of the arrow. Lower case ② (The same as of Option (A)) ③ Pull the wiring of the motion sensor. ③...
  • Page 337 '20 • KX-T-373 <In the case of CnV2 connector on the indoor unit PCB> ① Connect the same color to the relay wiring (prepare on site) and the attached wiring <2>. ② Remove the control box cover from the indoor unit. ③...
  • Page 338 '20 • KX-T-373 (4) User’s manual PJZ012D134 SAFETY PRECAUTIONS WARNING ● If a child, person with disease or other persons needed for assist uses this product, people around the person should take sufficient care. A halt of the air-conditioner due to abnormal situation or motion sensor’s control may cause a feeling of sickness or accident.
  • Page 339 '20 • KX-T-373 Control setting (from eco touch remote control) ● Refer to the installation manual for eco touch remote control to activate the infrared sensor (motion sensor). TOP screen Menu _ Service setting _ Installation settings _ Service password ②...
  • Page 340 '20 • KX-T-373 12.3 Simple wired remote control (RCH-E3) 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 341 '20 • KX-T-373 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 342 '20 • KX-T-373 3. Master/ s In case of exposing cord △ Simple Remote Control Installation Manual PJZ012D069 ⑴   M ake certain to remove a screw on the bottom surface of the ⑴   U p to two r remote control. Read together with indoor unit's installation manual. WARNING ⑴...
  • Page 343 '20 • KX-T-373 3. Master/ slave setting when more than one remote control are used ⑴   U p 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 344 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 345 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 346 '20 • KX-T-373 12.4 OA spacer (FDTC series) PJZ012D125 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 347 '20 • KX-T-373 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 348 '20 • KX-T-373 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 349 '20 • KX-T-373 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 350 '20 • KX-T-373 DUCT JOINT FOR FDTC 12.5 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 351 '20 • KX-T-373 12.6 EEV-SET (FDK series) How to install Electronic Expansion Valve outside of the AC unit The external expansion valve is installed outside the KX indoor unit series, and control refrigerant fl ow to decrease refrigerant fl ow noise from the indoor unit. This manual is for the installation of EEV-SET to install indoor - outdoor unit piping.
  • Page 352 '20 • KX-T-373 Liquid piping (Branch piping side) MAX : 2.5m EEV-SET Ceiling Gas piping Service hole Indoor unit (FDK) MAX : 5m ② Refrigerant pipe work Install EEV-SET between indoor unit and branch pipe of liquid line. In case of Indoor unit type 15 - 56, joint to connect to φ 6.35 liquid pipe is necessary. CAUTION Please cool down the body part of electronic expansion valve so that the part may not be heated up to high temperature.
  • Page 353 φ9.52 φ9.52 Branching pipe from '20 • KX-T-373 Indoor unit (Liquid) outdoor unit (Liquid) EEV-SET Indoor unit Outdoor unit Indoor unit Liquid piping size (Type15-56) φ6.35 ※Prepare different diameter pipe joint for Type15-56 (Type71, 90) φ9.52 ◦  U se  phosphorus deoxidized copper alloy seamless pipe (C1220T specified in JIS H  3300) for refrigeration pipe installation.
  • Page 354 '20 • KX-T-373 ③ Electrical wiring 1. The original expansion valve inside the indoor unit should be fully opened. A) In case power source is turned off. Turn ON the power source in indoor unit. The expansion valve of indoor unit is fully opened automatically with original control of indoor unit. Please go the step 2.
  • Page 356 MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD. 2-3, Marunouchi 3-chome, Chiyoda-ku, Tokyo, 100-8332, Japan http://www.mhi-mth.co.jp/en/ 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.

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