Mitsubishi Heavy Industries SRK20ZS-W Technical Manual
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Mitsubishi Heavy Industries SRK20ZS-W Technical Manual

Inverter residential air-conditioners
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TECHNICAL MANUAL
INVERTER RESIDENTIAL
AIR-CONDITIONERS
Wi-Fi option model (SRK only)
(Split system, air to air heat pump type)
Wall mounted type
SRK20ZS-W, -WB, -WT/SRC20ZS-WA
SRK25ZS-W, -WB, -WT/SRC25ZS-WA2
SRK35ZS-W, -WB, -WT/SRC35ZS-WA2
Floor standing type
SRF25ZS-W/SRC25ZS-WA2
SRF35ZS-W/SRC35ZS-WA2
Ceiling concealed type
SRR25ZS-W/SRC25ZS-WA2
SRR35ZS-W/SRC35ZS-WA2
4-way ceiling cassette type
FDTC25VH1/SRC25ZS-WA2
FDTC35VH1/SRC35ZS-WA2
Manual No.'21•SRK-T-299
updated December 23, 2021
Note:
•
(1) SRK series in this technical manual will have the
service code "/A".
• SRK20ZS-W, -WB, -WT SRK20ZS-W/A, -WB/A, -WT/A
• SRK25ZS-W, -WB, -WT SRK25ZS-W/A, -WB/A, -WT/A
• SRK35ZS-W, -WB, -WT SRK35ZS-W/A, -WB/A, -WT/A
(2) SRC25/35ZS-WA2 and SRC25/35ZS-WA
have the same specifications, so SRK25/35ZS-W
can also be connected to SRC25/35ZS-WA.
However, SRF/SRR/FDTC cannot be connected
to SRC25/35ZS-WA.
#

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Summary of Contents for Mitsubishi Heavy Industries SRK20ZS-W

  • Page 1 (1) SRK series in this technical manual will have the Ceiling concealed type service code “/A”. SRR25ZS-W/SRC25ZS-WA2 • SRK20ZS-W, -WB, -WT SRK20ZS-W/A, -WB/A, -WT/A • SRK25ZS-W, -WB, -WT SRK25ZS-W/A, -WB/A, -WT/A SRR35ZS-W/SRC35ZS-WA2 • SRK35ZS-W, -WB, -WT SRK35ZS-W/A, -WB/A, -WT/A (2) SRC25/35ZS-WA2 and SRC25/35ZS-WA...
  • Page 2 '21 • SRK-T-299 CONTENTS 1. SPECIFICATIONS ..................(1) Wall mounted type (SRK) ..............(2) Floor standing type (SRF) ............................. 15 ............17 2. EXTERIOR DIMENSIONS ................19 ................... 19 ..................23 ..................24 3. ELECTRICAL WIRING .................. 27 .................... 27 ..................
  • Page 3 '21 • SRK-T-299 (4) Installing two air-conditioners in the same room ........122 (5) Selection of the annual cooling function ..........123 (6) Heating only function (SRK series only) ..........124 (7) High power operation ................124 (8) Economy operation ................124 (9) Flap and louver control (SRK and SRF series only) .......125 (10) Air outlet selection (SRF series only) .............126 (11) 3D auto operation (SRK series only) .............127 (12) Timer operation ..................128...
  • Page 4 '21 • SRK-T-299 11.2 FDTC series ....................194 11.2.1 Diagnosing of microcomputer circuit ..........194 (1) Selfdiagnosis function ................194 (2) Troubleshooting procedure ..............197 ............197 (3) Troubleshooting at the indoor unit (4) Troubleshooting at the outdoor unit ............200 (5) Check of anomalous operation data with the remote control ....201 (6) Inverter checker for diagnosis of inverter output ........203 (7) Outdoor unit inspection points ...............204...
  • Page 5 '21 • SRK-T-299 1. SPECIFICATIONS (1)　Wall mounted type (SRK) SRK20ZS-W Model Item Indoor unit SRK20ZS-W Outdoor unit SRC20ZS-WA Power source 1 Phase, 220 - 240V, 50Hz / 220V, 60Hz Nominal cooling capacity (range) 2.0 ( 0.9 (Min.) - 2.9 (Max.)) Nominal heating capacity (range) 2.7 ( 0.9 (Min.) - 4.3 (Max.))
  • Page 6 '21 • SRK-T-299 SRK25ZS-W Model Item Indoor unit SRK25ZS-W Outdoor unit SRC25ZS-WA2 Power source 1 Phase, 220 - 240V, 50Hz / 220V, 60Hz Nominal cooling capacity (range) 2.5 ( 0.9 (Min.) - 3.1 (Max.)) Nominal heating capacity (range) 3.2 ( 0.9 (Min.) - 4.5 (Max.)) Heating capacity (H2) —...
  • Page 7 '21 • SRK-T-299 SRK35ZS-W Model Item Indoor unit SRK35ZS-W Outdoor unit SRC35ZS-WA2 Power source 1 Phase, 220 - 240V, 50Hz / 220V, 60Hz Nominal cooling capacity (range) 3.5 ( 0.9 (Min.) - 4.0 (Max.)) Nominal heating capacity (range) 4.0 ( 0.9 (Min.) - 5.0 (Max.)) Heating capacity (H2) —...
  • Page 8 '21 • SRK-T-299 SRK20ZS-WB Model Item Indoor unit SRK20ZS-WB Outdoor unit SRC20ZS-WA Power source 1 Phase, 220 - 240V, 50Hz / 220V, 60Hz Nominal cooling capacity (range) 2.0 ( 0.9 (Min.) - 2.9 (Max.)) Nominal heating capacity (range) 2.7 ( 0.9 (Min.) - 4.3 (Max.)) Heating capacity (H2) —...
  • Page 9 '21 • SRK-T-299 SRK25ZS-WB Model Item Indoor unit SRK25ZS-WB Outdoor unit SRC25ZS-WA2 Power source 1 Phase, 220 - 240V, 50Hz / 220V, 60Hz Nominal cooling capacity (range) 2.5 ( 0.9 (Min.) - 3.1 (Max.)) Nominal heating capacity (range) 3.2 ( 0.9 (Min.) - 4.5 (Max.)) Heating capacity (H2) —...
  • Page 10 '21 • SRK-T-299 SRK35ZS-WB Model Item Indoor unit SRK35ZS-WB Outdoor unit SRC35ZS-WA2 Power source 1 Phase, 220 - 240V, 50Hz / 220V, 60Hz Nominal cooling capacity (range) 3.5 ( 0.9 (Min.) - 4.0 (Max.)) Nominal heating capacity (range) 4.0 ( 0.9 (Min.) - 5.0 (Max.)) Heating capacity (H2) —...
  • Page 11 '21 • SRK-T-299 SRK20ZS-WT Model Item Indoor unit SRK20ZS-WT Outdoor unit SRC20ZS-WA Power source 1 Phase, 220 - 240V, 50Hz / 220V, 60Hz Nominal cooling capacity (range) 2.0 ( 0.9 (Min.) - 2.9 (Max.)) Nominal heating capacity (range) 2.7 ( 0.9 (Min.) - 4.3 (Max.)) Heating capacity (H2) —...
  • Page 12 '21 • SRK-T-299 SRK25ZS-WT Model Item Indoor unit SRK25ZS-WT Outdoor unit SRC25ZS-WA2 Power source 1 Phase, 220 - 240V, 50Hz / 220V, 60Hz Nominal cooling capacity (range) 2.5 ( 0.9 (Min.) - 3.1 (Max.)) Nominal heating capacity (range) 3.2 ( 0.9 (Min.) - 4.5 (Max.)) Heating capacity (H2) —...
  • Page 13 '21 • SRK-T-299 SRK35ZS-WT Model Item Indoor unit SRK35ZS-WT Outdoor unit SRC35ZS-WA2 Power source 1 Phase, 220 - 240V, 50Hz / 220V, 60Hz Nominal cooling capacity (range) 3.5 ( 0.9 (Min.) - 4.0 (Max.)) Nominal heating capacity (range) 4.0 ( 0.9 (Min.) - 5.0 (Max.)) Heating capacity (H2) —...
  • Page 14 '21 • SRK-T-299 (2)　Floor standing type (SRF) Indoor unit Outdoor unit Model Item SRF25ZS-W SRC25ZS-WA2 Power source 1 Phase, 220 - 240V, 50Hz / 220V, 60Hz Nominal cooling capacity (range) 2.5 ( 0.9 (Min.) - 3.1 (Max.)) Nominal heating capacity (range) 2.9 ( 0.8 (Min.) - 3.7 (Max.)) Heating capacity (H2) —...
  • Page 15 '21 • SRK-T-299 Indoor unit Outdoor unit Model Item SRF35ZS-W SRC35ZS-WA2 Power source 1 Phase, 220 - 240V, 50Hz / 220V, 60Hz Nominal cooling capacity (range) 3.5 ( 0.9 (Min.) - 4.1 (Max.)) Nominal heating capacity (range) 4.5 ( 0.8 (Min.) - 5.2 (Max.)) Heating capacity (H2) —...
  • Page 16 '21 • SRK-T-299 (3)　Ceiling concealed type (SRR) SRR25ZS-W Model Item Indoor unit SRR25ZS-W Outdoor unit SRC25ZS-WA2 Power source 1 Phase, 220 - 240V, 50Hz Nominal cooling capacity (range) 2.5 ( 0.9 (Min.) - 3.2 (Max.)) Nominal heating capacity (range) 2.9 ( 0.9 (Min.) - 4.4 (Max.)) Heating capacity (H2) —...
  • Page 17 '21 • SRK-T-299 SRR35ZS-W Model Item Indoor unit SRR35ZS-W Outdoor unit SRC35ZS-WA2 Power source 1 Phase, 220 - 240V, 50Hz Nominal cooling capacity (range) 3.5 ( 0.9 (Min.) - 4.1 (Max.)) Nominal heating capacity (range) 4.2 ( 1.0 (Min.) - 5.2 (Max.)) Heating capacity (H2) —...
  • Page 18 '21 • SRK-T-299 (4)　4-way ceiling cassette type (FDTC) FDTC25VH1 Model Item Indoor unit FDTC25VH1 Outdoor unit SRC25ZS-WA2 Power source 1 Phase, 220 - 240V, 50Hz Nominal cooling capacity (range) 2.5 ( 0.9 (Min.) - 3.2 (Max.)) Nominal heating capacity (range) 2.9 ( 0.9 (Min.) - 4.0 (Max.)) Heating capacity (H2) —...
  • Page 19 '21 • SRK-T-299 FDTC35VH1 Model Item Indoor unit FDTC35VH1 Outdoor unit SRC35ZS-WA2 Power source 1 Phase, 220 - 240V, 50Hz Nominal cooling capacity (range) 3.5 ( 0.9 (Min.) - 4.3 (Max.)) Nominal heating capacity (range) 4.25 ( 0.9 (Min.) - 4.6 (Max.)) Heating capacity (H2) —...
  • Page 20 '21 • SRK-T-299 2. EXTERIOR DIMENSIONS (1) 　 Indoor units (a)　Wall mounted type (SRK) Models SRK20ZS-W, 25ZS-W, 35ZS-W SRK20ZS-WB, 25ZS-WB, 35ZS-WB SRK20ZS-WT, 25ZS-WT, 35ZS-WT RLF000Z103...
  • Page 21 '21 • SRK-T-299 (b)　Floor standing type (SRF) Models SRF25ZS-W, 35ZS-W RFB000Z006...
  • Page 22 '21 • SRK-T-299 (c)　Ceiling concealed type (SRR) Models SRR25ZS-W, 35ZS-W 660 （ Inlet dimension） Symbol Content φ9.52 （ 3／8"） （ Flare） Gas piping φ6.35 （ 1／4"） （ Flare） Liquid piping VP25 （ I.D.25 , O.D.32） Drain piping （Used with attached connector） VP25 （...
  • Page 23 '21 • SRK-T-299 (d)　4-way ceiling cassette type (FDTC) Models FDTC25VH1, 35VH1 PJF000Z738 PJF000Z755...
  • Page 24 '21 • SRK-T-299 (2)　Outdoor units 　Models SRC20ZS-WA, 25ZS-WA2, 35ZS-WA2 RCV000Z042...
  • Page 25 '19 • SCM-DB-267 '19 • SCM-DB-267 '19 • SCM-DB-267 '21 • SRK-T-299 (4) Remote control (4) Remote control (4) Remote control (3)　Remote control (a) Wireless remote control (a) Wireless remote control (a)　Wireless remote control (a) Wireless remote control Unit:mm Unit:mm Unit:mm 　...
  • Page 26 '21 • SRK-T-299 (b)　Wired remote control (Option parts) 　　 Interface kit (SC-BIKN2-E) is required to use the wired remote control. 　　Model RC-EX3A Installation space Dimensions (Viewed from front) 30mm 30mm 配線 Wiring 30mm 30mm 30mm 30mm 固定穴 Fixing holes R/C temperature sensor Secure minimum spaces for disassembling the case.
  • Page 27 '21 • SRK-T-299 Model RC-E5 Wiring outlet Cut off the upper thin part of remote control lower case with a nipper or knife, and grind burrs with a file etc. Exposed mounting In case of pulling out In case of pulling out from upper left from center 0.3mm...
  • Page 28 '21 • SRK-T-299 3. ELECTRICAL WIRING (1) 　 Indoor units (a)　Wall mounted type (SRK) Models SRK20ZS-W, 25ZS-W, 35ZS-W SRK20ZS-WB, 25ZS-WB, 35ZS-WB SRK20ZS-WT, 25ZS-WT, 35ZS-WT RWA000Z416...
  • Page 29 '21 • SRK-T-299 (b)　Floor standing type (SRF) Models SRF25ZS-W, 35ZS-W RWB000Z057...
  • Page 30 '21 • SRK-T-299 (c)　Ceiling concealed type (SRR) Models SRR25ZS-W, 35ZS-W RJJ000Z003...
  • Page 31 '21 • SRK-T-299 (d)　4-way ceiling cassette type (FDTC) Models FDTC25VH1, 35VH1 PJF000Z516...
  • Page 32 '21 • SRK-T-299 (2)　Outdoor units 　 Models SRC20ZS-WA, 25ZS-WA2, 35ZS-WA2 RWC000Z307...
  • Page 33 '21 • SRK-T-299 4. NOISE LEVEL (1)　Wall mounted type (SRK) (a)　Sound power level Models SRK20ZS-W, -WB, -WT ISO5151 T1/H1 （Indoor unit） Condition SRK20ZS-W,WB,WT Model 48 dB(A) Noise Cooling MODE Rated capacity value 50 dB(A) Level Heating × Cooling ○ Heating...
  • Page 34 '21 • SRK-T-299 Models SRK25ZS-W, -WB, -WT ISO5151 T1/H1 （Indoor unit） Condition SRK25ZS-W,WB,WT Model 50 dB(A) Noise Cooling MODE Rated capacity value 53 dB(A) Level Heating × Cooling ○ Heating 1000 2000 4000 8000 Mid octave band frequency (Hz) （Outdoor unit） SRC25ZS-WA2 Model 56 dB(A)
  • Page 35 '21 • SRK-T-299 Models SRK35ZS-W, -WB, -WT （Indoor unit） ISO5151 T1/H1 Condition SRK35ZS-W,WB,WT Model 54 dB(A) Noise Cooling MODE Rated capacity value 56 dB(A) Level Heating × Cooling ○ Heating 1000 2000 4000 8000 Mid octave band frequency (Hz) （Outdoor unit） SRC35ZS-WA2 Model 61 dB(A)
  • Page 36 '21 • SRK-T-299 (b)　Sound pressure level ISO5151 T1/H1 (i) Rated capacity value Condition Models SRK20ZS-W, -WB, -WT MODE Rated capacity value Mike position （Indoor unit） SRK20ZS-W,WB,WT Model 0.8m 34 dB(A) Noise Cooling Unit Mike position 36 dB(A) (Center & low points)
  • Page 37 '21 • SRK-T-299 ISO5151 T1/H1 Condition Models SRK25ZS-W, -WB, -WT MODE Rated capacity value Mike position （Indoor unit） SRK25ZS-W,WB,WT Model 0.8m 36 dB(A) Unit Noise Cooling Mike position 39 dB(A) (Center & low points) Level Heating × Cooling ○ Heating 1000 2000 4000...
  • Page 38 '21 • SRK-T-299 ISO5151 T1/H1 Condition Models SRK35ZS-W, -WB, -WT MODE Rated capacity value Mike position （Indoor unit） SRK35ZS-W,WB,WT Model 0.8m 40 dB(A) Unit Noise Cooling Mike position 41 dB(A) (Center & low points) Level Heating × Cooling ○ Heating 1000 2000 4000...
  • Page 39 '21 • SRK-T-299 (ii) Each fan speed mode ISO5151 T1/H1 Condition Models SRK20ZS-W, -WB, -WT MODE Mike position （Indoor unit） SRK20ZS-W,WB,WT Model 0.8m 34 dB(A) Noise Cooling Unit Mike position 36 dB(A) (Center & low points) Level Heating × Cooling ○...
  • Page 40 '21 • SRK-T-299 ISO5151 T1/H1 Condition MODE Mike position （Indoor unit） SRK20ZS-W,WB,WT Model 0.8m 22 dB(A) Unit Noise Cooling Mike position 23 dB(A) (Center & low points) Level Heating × Cooling ○ Heating 1000 2000 4000 8000 Mid octave band frequency (Hz)
  • Page 41 '21 • SRK-T-299 ISO5151 T1/H1 Condition Models SRK25ZS-W, -WB, -WT MODE Mike position （Indoor unit） SRK25ZS-W,WB,WT Model 0.8m 36 dB(A) Noise Cooling Unit Mike position 39 dB(A) (Center & low points) Level Heating × Cooling ○ Heating 1000 2000 4000 8000 Mid octave band frequency (Hz) MODE...
  • Page 42 '21 • SRK-T-299 ISO5151 T1/H1 Condition MODE Mike position （Indoor unit） SRK25ZS-W,WB,WT Model 0.8m 23 dB(A) Noise Cooling Unit Mike position 24 dB(A) (Center & low points) Level Heating × Cooling ○ Heating 1000 2000 4000 8000 Mid octave band frequency (Hz) MODE Mike position （Indoor unit）...
  • Page 43 '21 • SRK-T-299 ISO5151 T1/H1 Condition Models SRK35ZS-W, -WB, -WT MODE Mike position （Indoor unit） SRK35ZS-W,WB,WT Model 0.8m 40 dB(A) Noise Cooling Unit Mike position 41 dB(A) (Center & low points) Level Heating × Cooling ○ Heating 1000 2000 4000 8000 Mid octave band frequency (Hz) MODE...
  • Page 44 '21 • SRK-T-299 ISO5151 T1/H1 Condition MODE Mike position （Indoor unit） SRK35ZS-W,WB,WT Model 0.8m 26 dB(A) Noise Cooling Unit Mike position 25 dB(A) (Center & low points) Level Heating × Cooling ○ Heating 1000 2000 4000 8000 Mid octave band frequency (Hz) MODE Mike position （Indoor unit）...
  • Page 45 '21 • SRK-T-299 ISO5151 T1/H1 Condition （Outdoor unit） Mike position: at highest noise level in position as mentioned below SRC20ZS-WA Model Distance from front side 1m 42 dB(A) Noise Cooling MODE Silent 43 dB(A) Level Heating × Cooling ○ Heating 1000 2000 4000...
  • Page 46 '21 • SRK-T-299 ISO5151 T1/H1 Condition （Outdoor unit） Mike position: at highest noise level in position as mentioned below SRC35ZS-WA2 Model Distance from front side 1m 45 dB(A) Noise Cooling MODE Silent 44 dB(A) Level Heating × Cooling ○ Heating 1000 2000 4000...
  • Page 47 '21 • SRK-T-299 (2)　Floor standing type (SRF) (a)　Sound power level Model SRF25ZS-W (Indoor unit) ISO5151 T1/H1 Condition Model SRF25ZS-W Cooling Rated capacity value (Hi) 50 dB(A) Noise MODE Heating Level 51 dB(A) × ○ Cooling Heating 1000 2000 4000 8000 Mid octave band frequency (Hz) (Outdoor unit) Model...
  • Page 48 '21 • SRK-T-299 Model SRF35ZS-W (Indoor unit) ISO5151 T1/H1 Condition Model SRF35ZS-W Cooling Rated capacity value (Hi) 51 dB(A) Noise MODE Heating Level 52 dB(A) × ○ Cooling Heating 1000 2000 4000 8000 Mid octave band frequency (Hz) (Outdoor unit) Model SRC35ZS-WA2 Cooling...
  • Page 49 '21 • SRK-T-299 (b)　Sound pressure level ISO5151 T1/H1 Condition (i) Rated capacity value (Hi) Model SRF25ZS-W Rated capacity value (Hi) MODE (Indoor unit) Mike position Model SRF25ZS-W Noise Cooling 38 dB(A) Mike position Unit Level Heating 39 dB(A) × ..Cooling, Heating N7 0 N6 0...
  • Page 50 '21 • SRK-T-299 ISO5151 T1/H1 Condition Model SRF35ZS-W Rated capacity value (Hi) MODE (Indoor unit) Mike position Model SRF35ZS-W Noise Cooling 40 dB(A) Mike position Unit Level Heating 41 dB(A) × ..Cooling, Heating N5 0 N3 0 1000 2000 4000 8000 Mid octave band frequency (Hz)
  • Page 51 '21 • SRK-T-299 (c)　Each fan speed mode ISO5151 T1/H1 Condition Model SRF25ZS-W MODE (Indoor unit) Mike position Model SRF25ZS-W Noise Cooling 32 dB(A) Mike position Unit Level Heating 35 dB(A) × ..Cooling, Heating N5 0 N3 0 1000 2000 4000 8000 Mid octave band frequency (Hz)
  • Page 52 '21 • SRK-T-299 Condition ISO5151 T1/H1 MODE (Indoor unit) Mike position Model SRF25ZS-W Cooling Noise 25 dB(A) Mike position Unit Level Heating 29 dB(A) × ..Cooling, Heating N5 0 N3 0 1000 2000 4000 8000 Mid octave band frequency (Hz) (Outdoor unit) Model SRC25ZS-WA2...
  • Page 53 '21 • SRK-T-299 Model SRF35ZS-W ISO5151 T1/H1 Condition MODE (Indoor unit) Mike position Model SRF35ZS-W Noise Cooling 35 dB(A) Mike position Unit Level Heating 36 dB(A) × ..Cooling, Heating N5 0 N3 0 1000 2000 4000 8000 Mid octave band frequency (Hz) ISO5151 T1/H1 Condition MODE...
  • Page 54 '21 • SRK-T-299 Condition ISO5151 T1/H1 MODE (Indoor unit) Mike position Model SRF35ZS-W Cooling Noise 29 dB(A) Mike position Unit Level Heating 33 dB(A) × ..Cooling, Heating N5 0 N3 0 1000 2000 4000 8000 Mid octave band frequency (Hz) (Outdoor unit) Model SRC35ZS-WA2...
  • Page 55 '21 • SRK-T-299 (3)　Ceiling concealed type (SRR) (a)　Sound power level Model SRR25ZS-W ISO5151 T1/H1 Condition ●Non duct （Indoor unit） MODE Rated capacity value (Hi) SRR25ZS-W Model 56 dB(A) Noise Cooling 59 dB(A) level Heating × Cooling ○ Heating 80.0 70.0 60.0 50.0 40.0...
  • Page 56 '21 • SRK-T-299 ISO5151 T1/H1 Condition 　 ●With duct （Indoor unit） MODE Rated capacity value (Hi) SRR25ZS-W Model 56 dB(A) Noise Cooling 59 dB(A) level Heating Cooling ○ Heating × 70.0 60.0 50.0 40.0 30.0 20.0 10.0 Mid octave band frequency(Hz)
  • Page 57 '21 • SRK-T-299 　 Model SRR35ZS-W ISO5151 T1/H1 Condition 　 ●Non duct （Indoor unit） MODE Rated capacity value (Hi) SRR35ZS-W Model 56 dB(A) Noise Cooling 58 dB(A) level Heating × Cooling ○ Heating 80.0 70.0 60.0 50.0 40.0 30.0 20.0 10.0 Mid octave band frequency(Hz) （Outdoor unit）...
  • Page 58 '21 • SRK-T-299 ISO5151 T1/H1 Condition 　 ●With duct MODE Rated capacity value (Hi) （Indoor unit） SRR35ZS-W Model 57 dB(A) Noise Cooling 60 dB(A) level Heating × Cooling ○ Heating 70.0 60.0 50.0 40.0 30.0 20.0 10.0 Mid octave band frequency(Hz)
  • Page 59 '21 • SRK-T-299 (b)　Sound pressure level (i) Rated capacity value (Hi) Model SRR25ZS-W ISO5151 T1/H1 Condition ●Sound pressure level ① （Indoor unit） MODE SRR25ZS-W Model 37 dB(A) Noise Cooling 40 dB(A) level Heating Heating Cooling ○ × Mid octave band frequency(Hz) （Outdoor unit）...
  • Page 60 '21 • SRK-T-299 ISO5151 T1/H1 Condition 　 ●Sound pressure level ② （Indoor unit） MODE SRR25ZS-W Model 31 dB(A) Noise Cooling 33 dB(A) level Heating Cooling ○ Heating × Mid octave band frequency(Hz) ISO5151 T1/H1 　 ●Sound pressure level ③ Condition （Indoor unit）...
  • Page 61 '21 • SRK-T-299 　 Model SRR35ZS-W ISO5151 T1/H1 Condition 　 ●Sound pressure level ① （Indoor unit） MODE SRR35ZS-W Model 38 dB(A) Noise Cooling 42 dB(A) level Heating Cooling ○ Heating × Mid octave band frequency(Hz) （Outdoor unit） SRC35ZS-WA2 Model 50 dB(A) Noise Cooling 50 dB(A)
  • Page 62 '21 • SRK-T-299 ISO5151 T1/H1 Condition 　 ●Sound pressure level ② （Indoor unit） MODE SRR35ZS-W Model 33 dB(A) Noise Cooling 34 dB(A) level Heating Cooling ○ Heating × Mid octave band frequency(Hz) ISO5151 T1/H1 Condition 　 ●Sound pressure level ③ （Indoor unit）...
  • Page 63 '21 • SRK-T-299 　(ii) Each fan speed mode 　 Model SRR25ZS-W ISO5151 T1/H1 Condition 　 ●Sound pressure level ① （Indoor unit） MODE SRR25ZS-W Model 33 dB(A) Noise Cooling 37 dB(A) level Heating Cooling ○ Heating × Mid octave band frequency(Hz) （Indoor unit）...
  • Page 64 '21 • SRK-T-299 ISO5151 T1/H1 Condition （Indoor nit） MODE SRR25ZS-W Model 24 dB(A) Noise Cooling 28 dB(A) evel Heating Cooling ○ Heating × Mid octave band frequency(Hz) ISO5151 T1/H1 （Outdoor unit） Condition SRC25ZS-WA2 Model 41 dB(A) Noise Cooling MODE MODE Silent 42 dB(A) evel...
  • Page 65 '21 • SRK-T-299 ISO5151 T1/H1 Condition 　 ●Sound pressure level ② （Indoor nit） MODE SRR25ZS-W Model 28 dB(A) Noise Cooling 30 dB(A) evel Heating Cooling ○ Heating × Mid octave band frequency(Hz) （Indoor nit） ISO5151 T1/H1 Condition SRR25ZS-W Model 26 dB(A) Noise Cooling MODE...
  • Page 66 '21 • SRK-T-299 ISO5151 T1/H1 Condition （Indoor unit） MODE SRR25ZS-W Model 21 dB(A) Noise Cooling 23 dB(A) level Heating Cooling ○ Heating × Mid octave band frequency(Hz) ISO5151 T1/H1 Condition 　 ●Sound pressure level ③ （Indoor unit） MODE SRR25ZS-W Model 35 dB(A) Noise Cooling...
  • Page 67 '21 • SRK-T-299 ISO5151 T1/H1 Condition （Indoor nit） MODE SRR25ZS-W Model 32 dB(A) Noise Cooling 38 dB(A) evel Heating × Cooling ○ Heating Mid octave band frequency(Hz) ISO5151 T1/H1 Condition （Indoor unit） MODE SRR25ZS-W Model 25 dB(A) Noise Cooling 31 dB(A) level Heating Cooling ○...
  • Page 68 '21 • SRK-T-299 　 Model SRR35ZS-W ISO5151 T1/H1 Condition 　 ●Sound pressure level ① （Indoor nit） MODE SRR35ZS-W Model 34 dB(A) Noise Cooling 38 dB(A) evel Heating Cooling ○ Heating × Mid octave band frequency(Hz) （Indoor nit） ISO5151 T1/H1 Condition SRR35ZS-W Model 31 dB(A)
  • Page 69 '21 • SRK-T-299 ISO5151 T1/H1 Condition （Indoor nit） MODE SRR35ZS-W Model 25 dB(A) Noise Cooling 29 dB(A) evel Heating Cooling ○ Heating × Mid octave band frequency(Hz) ISO5151 T1/H1 （Outdoor unit） Condition SRC35ZS-WA2 Model 45 dB(A) Noise Cooling MODE MODE Silent 43 dB(A) evel...
  • Page 70 '21 • SRK-T-299 ISO5151 T1/H1 Condition 　 ●Sound pressure level ② （Indoor nit） MODE SRR35ZS-W Model 30 dB(A) Noise Cooling 32 dB(A) evel Heating Cooling ○ Heating × Mid octave band frequency(Hz) （Indoor nit） ISO5151 T1/H1 Condition SRR35ZS-W Model 27 dB(A) Noise Cooling MODE...
  • Page 71 '21 • SRK-T-299 ISO5151 T1/H1 Condition （Indoor nit） MODE SRR35ZS-W Model 22 dB(A) Noise Cooling 24 dB(A) evel Heating Cooling ○ Heating × Mid octave band frequency(Hz) ISO5151 T1/H1 Condition 　 ●Sound pressure level ③ （Indoor unit） MODE SRR35ZS-W Model 37 dB(A) Noise Cooling...
  • Page 72 '21 • SRK-T-299 ISO5151 T1/H1 Condition （Indoor nit） MODE SRR35ZS-W Model 33 dB(A) Noise Cooling 39 dB(A) evel Heating × Cooling ○ Heating Mid octave band frequency(Hz) ISO5151 T1/H1 Condition （Indoor unit） MODE SRR35ZS-W Model 27 dB(A) Noise Cooling 33 dB(A) level Heating Cooling ○...
  • Page 73 '21 • SRK-T-299 (4)　4-way ceiling cassette type (FDTC) (a)　Sound power level Model FDTC25VH1 （Indoor nit） ISO5151 T1/H1 Condition FDTC25VH1 Model 51 dB(A) Noise Cooling MODE Rated capacity value (P-Hi) 52 dB(A) evel Heating × Cooling ○ Heating Mid octave band frequency(Hz) （Outdoor unit）...
  • Page 74 '21 • SRK-T-299 　 Model FDTC35VH1 （Indoor unit） ISO5151 T1/H1 Condition FDTC35VH1 Model 52 dB(A) Noise Cooling MODE Rated capacity value (P-Hi) 53 dB(A) level Heating × Cooling ○ Heating Mid octave band frequency(Hz) （Outdoor unit） SRC35ZS-WA2 Model 62 dB(A) Noise Cooling 62 dB(A)
  • Page 75 '21 • SRK-T-299 (b)　Sound pressure level (i) Rated capacity value ISO5151 T1/H1 Condition Model FDTC25VH1 MODE Rated capacity value (P-Hi) Mike position ● （Indoor nit） FDTC25VH1 Model 1.5m 38 dB(A) Mike position Noise Cooling (Center & below unit) 39 dB(A) evel Heating ×...
  • Page 76 '21 • SRK-T-299 ISO5151 T1/H1 Condition 　 Model FDTC35VH1 MODE Rated capacity value (P-Hi) Mike position ● （Indoor unit） FDTC35VH1 Model 1.5m 39 dB(A) Mike position Noise Cooling (Center & below unit) 41 dB(A) level Heating × Cooling ○ Heating Mid octave band frequency(Hz) （Outdoor unit）...
  • Page 77 '21 • SRK-T-299 　(ii) Each fan speed mode ISO5151 T1/H1 Condition 　 Model FDTC25VH1 MODE Mike position ● （Indoor unit） FDTC25VH1 Model 34 dB(A) Noise Cooling 1.5m Mike position 36 dB(A) level Heating (Center & below unit) × Cooling ○ Heating Mid octave band frequency(Hz) ISO5151 T1/H1...
  • Page 78 '21 • SRK-T-299 ISO5151 T1/H1 Condition MODE Mike position ● （Indoor unit） FDTC25VH1 Model 1.5m 27 dB(A) Mike position Noise Cooling (Center & below unit) 28 dB(A) level Heating × Cooling ○ Heating Mid octave band frequency(Hz) （Outdoor unit） ISO5151 T1/H1 Condition SRC25ZS-WA2 Model...
  • Page 79 '21 • SRK-T-299 ISO5151 T1/H1 Condition 　 Model FDTC35VH1 MODE Mike position （Indoor unit） ● FDTC35VH1 Model 36 dB(A) Noise Cooling 1.5m Mike position 38 dB(A) level Heating (Center & below unit) × Cooling ○ Heating Mid octave band frequency(Hz) ISO5151 T1/H1 Condition MODE...
  • Page 80 '21 • SRK-T-299 ISO5151 T1/H1 Condition MODE Mike position ● （Indoor unit） FDTC35VH1 Model 1.5m 29 dB(A) Mike position Noise Cooling (Center & below unit) 30 dB(A) level Heating × Cooling ○ Heating Mid octave band frequency(Hz) （Outdoor unit） ISO5151 T1/H1 Condition SRC35ZS-WA2 Model...
  • Page 81 '21 • SRK-T-299 5. CHARACTERISTICS OF FAN Model SRR25ZS-W Cooling Heating Air flow (m /min) Air flow (m /min) Model SRR35ZS-W Cooling Heating Air flow (m /min) Air flow (m /min)
  • Page 82 '09•SRK-DB-087D '21 • SRK-T-299 6. PIPING SYSTEM 5 PIPING SYSTEM Models SRK20ZS-W, -WB, -WT Model SRK35ZS-S SRK25ZS-W, -WB, -WT SRK35ZS-W, -WB, -WT (TH3) pipe (TH4) temperature temperature 4-way valve Humidity temperature sensor (HS, (TH2) SRK35only) temperature temperature Models SRF25ZS-W, 35ZS-W...
  • Page 83 '09•SRK-DB-087D '21 • SRK-T-299 5 PIPING SYSTEM Models SRK20ZS-S, 25ZS-S Models SRR25ZS-W, 35ZS-W Heat exchanger temperature sensor (Th2 pipe temperature (Th1) 4-way valve temperature (Th2 (TH2) (TH2) '09•SRK-DB-087D 5 PIPING SYSTEM Models SRK20ZS-S, 25ZS-S Models FDTC25VH1, 35VH1 Model SRK35ZS-S Heat exchanger temperature sensor (Thi-R3) pipe...
  • Page 84 '20 • SR-DB-284D '21 • SRK-T-299 7. RANGE OF USAGE & LIMITAIONS SRK20ZS-W, -WB, -WT SRK25ZS-W, -WB, -WT SRK35ZS-W, -WB, -WT SRF25ZS-W, 35ZS-W SRR25ZS-W, 35ZS-W FDTC25VH1,FDTC35VH1 ℃ ℃ ℃ ℃ ± Selection chart Net capacity = Capacity shown on specification × Correction factors as follows...
  • Page 85 '21 • SRK-T-299 (2) Correction of cooling and heating capacity in relation to one way length of refrigerant piping Piping length [m] Cooling 0.99 0.975 0.965 Heating (3) Correction relative to frosting on outdoor heat exchanger during heating How to obtain the cooling and heating capacity...
  • Page 86 '21 • SRK-T-299 8. CAPACITY TABLES 7. CAPACITY TABLES (1)　Wall mounted type (SRK) Models SRK20ZS-W, -WB, -WT Cooling mode (kW) Heating mode (HC) (kW) Indoor air temperature Outdoor Outdoor Indoor air temperature 21˚CDB 23˚CDB 26˚CDB 27˚CDB 28˚CDB 31˚CDB 33˚CDB Air ow...
  • Page 87 '21 • SRK-T-299 (2)　Floor standing type Model SRF25ZS-W Cooling mode (kW) Heating mode (kW) Indoor air temperature Outdoor air Outdoor Indoor air temperature Air flow temperature ℃DB ℃DB ℃DB ℃DB ℃DB ℃DB ℃DB Air flow temperature ℃WB 16℃ DB 18℃ DB 20℃ DB 22℃ DB 24℃ DB ℃WB ℃WB ℃WB...
  • Page 88 '21 • SRK-T-299 (3)　Ceiling concealed type (SRR) Model SRR25ZS-W Cooling mode (kW) Heating mode (HC) (kW) Indoor air temperature Outdoor Outdoor Indoor air temperature 21˚CDB 23˚CDB 26˚CDB 27˚CDB 28˚CDB 31˚CDB 33˚CDB Air flow air temperature Air flow ˚CWB temperature 14˚CWB 16˚CWB 18˚CWB 19˚CWB...
  • Page 89 '21 • SRK-T-299 (4)　4-way ceiling cassette type (FDTC) Model FDTC25VH1 Cooling mode (kW) Heating mode (HC) (kW) Indoor air temperature Outdoor Outdoor Indoor air temperature 21˚CDB 23˚CDB 26˚CDB 27˚CDB 28˚CDB 31˚CDB 33˚CDB Air flow air temperature Air flow ˚CWB temperature 14˚CWB 16˚CWB 18˚CWB...
  • Page 90 '21 • SRK-T-299 9. APPLICATION DATA 9.1 Installation of indoor unit (1)　Wall mounted type (SRK) 　 Models SRK20ZS-W, -WB, -WT SRK25ZS-W, -WB, -WT SRK35ZS-W, -WB, -WT...
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  • Page 98 '21 • SRK-T-299 8. APPLICATION DATA (2)　Floor standing type (SRF) (1) Installation of indoor unit Models SRF25ZS-W, 35ZS-W...
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  • Page 102 '21 • SRK-T-299 (3)　Ceiling concealed type (SRR) 　 Models SRR25ZS-W, 35ZS-W...
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  • Page 106 '21 • SRK-T-299 (4) 4-way ceiling cassette type(FDTC) Models FDTC25VH1, 35VH1 PJF012D509 PJF012D514 ①B This manual is for the installation of the indoor unit. ●Ins For wired remote control installation, refer to page 249. For wireless kit installation, refer to page 267. CAUTION ●Co For electrical wiring work (Outdoor unit) and refrigerant pipe work installation for outdoor unit, refer to...
  • Page 107 '21 • SRK-T-299 D509 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, When suspension bolt length is over 500mm, or the gap between the ceiling and roof is ○Unit type/Power supply specification...
  • Page 108 '21 • SRK-T-299 ⑤Refrigerant pipe (continued) ⑥D ④Installation of indoor unit (continued) ● Caution: Protection of the indoor unit 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 109 '21 • SRK-T-299 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) ● Refer to the attached manual for panel installation for details. unit, lay the main pipe 100mm below the e.
  • Page 110 '21 • SRK-T-299 ・ Panel installation PJF012D503 PJF012D503 Read this manual together with the indoor unit’s installation manual. * Caution before use ③ Removing the inlet grille <Removal> ①Be careful the installation height when installing the indoor unit. ① Also note that the installation height of this indoor unit is different from that of current (old) unit. and pressing it in the direction of arrow ①, pull the Installation height from the ceiling surface to the indoor unit.
  • Page 111 '21 • SRK-T-299 ⑥ Orientation of the panel installation For the Draft prevention panel 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 112 '21 • SRK-T-299 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 113 '21 • SRK-T-299 CHARACTERISTICS OF AIR FLOW IN DIVIDED DUCT FOR FDTC Models FDTC25VH1, 35VH1 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 114 '21 • SRK-T-299 RWC012A068F 9.2 Installation of outdoor unit Models SRC20ZS-WA SRC25ZS-WA2 SRC35ZS-WA2 service valves are...
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  • Page 116 '21 • SRK-T-299 4. Evacuation (1) Connect vacuum pump to gauge manifold. Connect charge hose of gauge manifold to service port of outdoor unit. (2) Run the vacuum pump for at least one hour after the vacuum gauge shows -0.1 MPa (–76 cm Hg). (3) C onfirm that the vacuum gauge indicator does not rise even if the system is left for 15 minutes or more.
  • Page 117 '21 • SRK-T-299 (2) Close the liquid service valve with hexagonal wrench key. (3) Fully open the gas service valve with hexagonal wrench key. (5) When the low pressure gauge becomes 0.01 MPa, close the gas service valve and stop forced cooling operation. 3 cores* 2.5mm or more, conformed with 60245 IEC57 4 cores* 1.5mm , conformed with 60245 IEC57 10mm from the end. 30mm or more 30mm or more 10mm 10mm No gas leaks from the joints of the service valves. Both liquid and gas service valves are fully open.
  • Page 118 '21 • SRK-T-299 9.3 Safety precautions in handling air-conditioners with flammable refrigerants RSA012A090 • There is information included in the user’s manual and/or is leaked, together with an external ignition source, there is a installation manual. possibility of ignition. • A service personnel should be handing this equipment with The user’s manual should be read carefully.
  • Page 119 '21 • SRK-T-299 CAUTION • 6. Repair to intrinsically safe components 13. Labelling • Do not apply any permanent inductive or • Equipment shall be labelled stating that it has been capacitance loads to the circuit without ensuring de-commissioned and emptied of refrigerant. The the working pressure is achieved, then venting to that this will not exceed the permissible voltage and label shall be dated and signed.
  • Page 120 '21 • SRK-T-299 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 121 '21 • SRK-T-299 10. OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER 10.1 SRK, SRF & SRR series (1) Operation control function by wireless remote control Operation section Transmission section ON/OFF (luminous) button Press to start operation, press again to stop. OPERATION MODE select button Each time the button is pressed, the FAN SPEED button mode changes.
  • Page 122 '21 • SRK-T-299 Unit display section SRF series Unit ON/OFF button RUN (HOT KEEP) light (green) This button can be used for turning on/off the unit when • Illuminates during operation. remote control is not available. • Blinks when airflow stops due to the ‘HOT KEEP’, ‘CLEAN operation’and ‘operation mode invalid’.
  • Page 123 Illuminates during TIMER operation. '21 • SRK-T-299 Function Indoor temperature Fan speed Flap/Louver Timer switch setting Operation mode About 24ºC COOL About 25ºC Auto Auto Continuous About 26ºC HEAT Note (1) Models SRF & SRR series only ・ ・ ・ Models SRK20, 25, 35ZS-W Models SRF25, 35ZS-W Models SRR25, 35ZS-W...
  • Page 124 remote control. Set the wireless remote control and indoor unit. (a) Setting the wireless remote control (i) Pull out the cover and take out batteries. '21 • SRK-T-299 (ii) Disconnect the switching line next to the battery with wire cutters. (iii) Insert batteries.
  • Page 125 '21 • SRK-T-299 (b) Content of control (i) If the outdoor air temperature sensor (TH3) detects below 5°C, the indoor unit speed is switched to 7(SRF & SRR:8)th step. (ii) If the outdoor air temperature sensor (TH3) detects higher than A°C, the indoor unit speed is changed to the normal control speed.
  • Page 126 ③ When the operation is retrieved from CLEAN or ALLERGEN CLEAR (SRK series only) operation. (b) When the following operation are set, ECONOMY operation will be cancelled. ① When the HI POWER/ECONOMY button is pressed again. '21 • SRK-T-299 ② When the operation mode is changed from DRY to FAN. ③...
  • Page 127 25° Approx. 35° '21 • SRK-T-299 Approx. 60° Approx. 70° (d) Memory flap (Flap or louver stopped) SRF series   Control the flap by AIR FLOW (UP/DOWN) button on the wireless remote control. (a) Flap   Each time when you press the AIR FLOW (UP/DOWN) button the mode changes as follows.
  • Page 128 '21 • SRK-T-299 (b) Auto air outlet selection (i) COOL, DRY operation 1) In case both lower and upper outlets operation is selected in Cooling or Dry operation, both outlets will be kept for sixty minutes after the start or until indoor temperature is below the setting point.
  • Page 129 Cooling Heating '21 • SRK-T-299 Flap Up/down swing Louver Center (Fixed) Cooling Heating Flap Horizontal blowing (Fixed) Slant forwardl blowing (Fixed) Louver Wide (Fixed) room Operation mode Air flow direction contorol < = < = Room temp. – Setting temp. 2°C 2°C <...
  • Page 130 '09•SRK-DB-087D '21 • SRK-T-299 '09•SRK-DB-087D (11) Timer operation (13) Silent mode As “Silent mode start” signal is received from the wireless remote control, it operates by dropping the outdoor fan tap and the (a) Comfort start-up (ON timer operation) (11) Timer operation compressor command speed.
  • Page 131 '21 • SRK-T-299 (16) Display brightness adjustment (SRK series only) This function can be used when it is necessary to adjust the brightness of unit display. Brightness level Timer light Run light 100% 100% Note(1) When the unit displays self diagnosis or service mode, brightness level is always LV2. (17) Wireless LAN connection function (SRK series only) (a) Operating conditions When a signal of wireless LAN connection setting was received from a remote control during all air-conditioners stop...
  • Page 132 Interval and Stop can be established. In the case, indoor air temperature is detected by sensor on the wired remote control. (b) Details of control at each operation mode (pattern) (i) Fuzzy operation ・ SRK series Model SRK20ZS-W SRK25ZS-W SRK35ZS-W Fan speed 20-115rps 20-115rps 20-115rps...
  • Page 133 (b) Detail of control in each mode (Pattern) Push ON/OFF button 30 seconds or more during setting this mode. At completion of the reset, the indoor Fuzzy operation unit emits a buzzer sound “PiPiPi”. Model SRK20ZS-W SRK2ZS-W SRK35ZS-W Fan speed 15-66rps...
  • Page 134 Indoor fan motor Outdoor fan motor (few minutes ON) (few minutes ON) 4-way valve (b) Detail of control in each mode (Pattern) Fuzzy operation ・ SRK series Model SRK20ZS-W SRK2ZS-W SRK35ZS-W Fan speed 15-66rps 15-74rps 15-98rps Auto 15-66rps 15-74rps 15-98rps...
  • Page 135 '21 • SRK-T-299 (22) Outline of automatic operation (a) Determination of operation mode Operation mode is determined by indoor air temperature and outdoor air temperature as following. Cooling Indoor air Heating SP: Setting temperature temperature (˚C) Outdoor air temperature (˚C) (b) Operation mode is changes when keep cooling and heating thermostat off 20 minutes and be satisfied with following conditions.
  • Page 136 '21 • SRK-T-299 When this control has continued for more than 30 minutes continuously,the following wind direction control is performed. ・ SRK series a) When the vertical wind direction is set at other than the vertical swing,the flaps change to the horizontal position. b) When the horizontal wind direction is set at other than the horizontal swing,the louver changes to the vertical position.
  • Page 137 (a) Operating conditions When the outdoor air temperature (TH2) has become continuously for 30 seconds at 41°C or more, or 47ºC or more with the compressor running, the lower limit speed of compressor is brought up. '21 • SRK-T-299 Outdoor air temperature (ii) Detail of operation Lower limit speed 1) The outdoor fan is stepped up by 3 speed step.
  • Page 138 Outdoor air temperature (°C) (Models SRK20-35) (Models SRK20-35) (Model SRK50) (Model SRK50) (Models SRK20-35) (Model SRK50) Outdoor air temperature (˚C) Outdoor air temperature (˚C) Outdoor air temperature (˚C) Outdoor air temperature (˚C) Outdoor air temperature (˚C) Outdoor air temperature (˚C) '21 •...
  • Page 139 '21 • SRK-T-299 (g) Heating overload protective control (g) Heating overload protective control (ii) Outdoor unit side (ii) Outdoor unit side 1) Operating conditions 1) Operating conditions When the outdoor air temperature (TH3) is 22°C or higher continues for 30 seconds while the compressor speed other than 0 rps. When the outdoor air temperature (TH3) is 22°C or higher continues for 30 seconds while the compressor speed other than 0 rps.
  • Page 140 '21 • SRK-T-299 Notes (1) When the discharge pipe temperature is in the range of 100-110ºC, the speed is reduced by 4 rps. (2) When the discharge pipe temperature is raised and continues operation for 20 seconds without changing, then the speed is reduced again by 4 rps. (3) If the discharge pipe temperature is in the range of 90-100ºC even when the compressor speed is maintained for 3 minutes when the temperature is in the range of 90-100ºC, the speed is raised by 1 rps and kept at that speed for 1 minute.
  • Page 141 '21 • SRK-T-299 2) Detail of operation After the outdoor fan operates at A speed for 60 seconds; the corresponding outdoor heat exchanger temperature shall im plement the following controls. ¡ Value of A Outdoor fan 2nd speed Outdoor temperature > 10˚C Outdoor temperature <...
  • Page 142 '21 • SRK-T-299 (s) Refrigeration cycle system protection (r) Refrigeration cycle system protection (i) Starting conditions When 5 minutes have elapsed after the compressor ON or the completion of the defrost control Other than the defrost control 3) When, after satisfying the conditions of 1) and 2) above, the compressor speed, room temperature (Th1) and indoor heat exchanger temperature (Th2) have satisfied the conditions in the following table for 5 minutes: Room temperature (Th1)/ Operation mode...
  • Page 143 '16 • PAC-T-251 '21 • SRK-T-299 1.10 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER 10.2 Models FDTC25VH1, 35VH1 1.10.1 Remote control 10.2.1 Remote control (Option parts) Wired remote control (1) Wired remote control Model RC-EX3A Model RC-EX3A ⑤ LCD (with backlight) ③...
  • Page 144 '21 • SRK-T-299 Wired remote control Wired remote control Model RC-E5 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 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.
  • Page 145 '21 • SRK-T-299 '16 • PAC-T-251 '16 • PAC-T-251 Wireless remote control Wireless remote control (2) Wireless remote control RCN-E2 Indication section 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.
  • Page 146 '16 • PAC-T-251 '21 • SRK-T-299 1.10.2 Operation control function by the wired remote control 10.2.2 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 147 '21 • SRK-T-299 ●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. At power failure –...
  • Page 148 '21 • SRK-T-299 ● 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 149 '21 • SRK-T-299 10.2.3 Operation control function by the indoor control (1) Auto operation (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 150 '21 • SRK-T-299 (ii) Regardless of the setting temperature, the cooling or heating operation mode is judged according to the "Judgment based on Room temperature/Cooling or Heating and Outdoor temperature/Cooling or Heating". 1) In case of "Room temperature/Cooling < Indoor return air temperature" and "Outdoor temperature/Cooling < Outdoor ⇒...
  • Page 151 '21 • SRK-T-299 (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” setting from the remote control. If the setting is enabled, the timer operates at every time. (ii) Set OFF timer by hour Set the time to stop the unit after operation, in the range from 1 to 12 hours (in the unit of hour).
  • Page 152 '21 • SRK-T-299 (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) Form heating thermostat OFF to ON (iv) After completing the defrost operation (only on units with thermostat ON) (b) Contents of operation...
  • Page 153 '21 • SRK-T-299 (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) To operate the swing louver when the air-conditioner is operating, press the “Direction” button on the TOP screen of remote control.
  • Page 154 '21 • SRK-T-299 (8) Thermostat operation (a) Cooling (i) Thermostat is operated with the room temperature control. (ii) Thermostat is turned ON or OFF relative to the setting room temperature as shown below. Thermostat ON Temperature drop Thermostat OFF Temperature rise Setting room temperature (iii) Thermostat is turned ON when the room temperature is in the range of -1 <...
  • Page 155 '21 • SRK-T-299 (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 remote control. ① Low fanspeed ② Set fan speed (Factory default) ③ Intermittence ④ Fan OFF (ii) When the “Low fan speed”...
  • Page 156 '21 • SRK-T-299 (11) Drain pump control (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 (a) above after turning the drain pump ON, and then stops.
  • Page 157 '21 • SRK-T-299 (c) Operation check mode There is no communication with the outdoor unit but it allows performing operation in respective modes by operating the remote control. (d) Drain pump test run mode As the drain pump test run is established, the drain pump only operates and during the operation protective functions by the microcomputer of indoor unit become ineffective.
  • Page 158 '21 • SRK-T-299 (17) Plural unit control – Control of 16 units group by one remote control (a) Function One remote control can control a group of multiple number of unit (Max. 16 indoor units). “Operation mode” which is set by the remote control can operate or stop all units in the group one after another in the order of unit. No. Thermostat and protective function of each unit function independently.
  • Page 159 '21 • SRK-T-299 (19) Abnormal temperature sensor (return air/indoor heat exchanger) broken wire/short-circuit detection (a) Broken wire detection When the return air temperature sensor detects -50°C or lower or the heat exchanger temperature sensor detect -50°C or lower for 5 seconds continuously, the compressor stops. After 3-minute delay, the compressor restarts but, if it is detected again within 60 minutes after the initial detection for 6 minutes continuously, stops again (the return air temperature sensor : E7, the heat exchanger temperature sensor : E6).
  • Page 160 '21 • SRK-T-299 (b) Input for external control The external input for the indoor unit can be selected from the following input. Input name Content 1 Run/Stop Refer to [(20) (c) Remote operation input] 2 Premission/Prohibition Refer to [(21) Operation permission/prohibition] 3 Cooling/Heating Refer to [(23) Selection of cooling/heating external input function] 4 Emergency stop...
  • Page 161 '21 • SRK-T-299 Individual operation (Factory default) All units operation (Local setting) Only the unit Only the unit All units in one All units in one directly connected CnT-6 or directly connected remote control remote control to the remote CnTA to the remote control system can be system can be...
  • Page 162 '21 • SRK-T-299 (a) In case of CnT ① Operation stop level > CnTA ③ Operation permission/prohibition level Operation Operation Operation Stop Stop Stop Level input Operation permission Operation permission CnTA Operation prohibition Operation permission/ prohibition setting Operation Operation( ) Operation Stop Stop...
  • Page 163 '21 • SRK-T-299 (22) Temporary stop input In case of temporary stop, operation lamp of remote control lights, but indoor/outdoor unit stop the operation. (a) In case of “level input” setting (Factory default) Input signal to CnT-6 or CnTA is OFF → ON : Temporary stop Input signal to CnT-6 or CnTA is OFF →...
  • Page 164 '21 • SRK-T-299 (24) Fan control at heating startup (a) Starting conditions At the start of heating operation and after the end of hot start control, if the difference of setting temperature and return air temperature is 5°C or higher, this control is performed. (b) Contents of control (i) Sampling is made at each minute and, when the indoor heat exchanger temperature (detected with Thi-R) is 37°C or higher, present number of revolutions of indoor fan speed is increased by 10min...
  • Page 165 '21 • SRK-T-299 (32) Fan circulator operation (RC-EX3A only) When the fan is used for circulation, the unit is operated as follows depending on the setting with the remote control. (a) If the invalid is selected with the remote control, the fan is operated continuously during the fan operation. (normal fan mode) (b) If the valid is selected with the remote control, the fan is operated or stopped when on the difference of the remote control temperature sensor and the return air temperature sensor becomes bigger than 3°C.
  • Page 166 '21 • SRK-T-299 (37) Motion sensor control (RC-EX3A and RCN-E2 only) The sensor determines the presence of people and the amount of activity, and the following controls are done by the motion sensor. Following settings are necessary to activate motion sensor control. (a) Infrared (motion) sensor setting: Installation setting of remote control RC-EX3A The indoor unit which is set to “Enable”...
  • Page 167 '21 • SRK-T-299 (i) Power saving / comfort control The setting temperature is adjusted according to the presence of people and their amount of activity detected by the infrared (motion) sensor. MODE:AUTO/COOL/HEAT mode operation Heat Source & Activity High None Normal When the extent of human 33ºC...
  • Page 168 '21 • SRK-T-299 10.2.4 Operation control function by the outdoor control (1) Defrost operation (a) Starting conditions (Defrosting operation can be started only when all of the following conditions are satisfied.) 1) After start of heating operation When it elapsed 35 minutes. (Accumulated compressor operation time) 2) After end of defrosting operation When it elapsed 35 minutes.
  • Page 169 '21 • SRK-T-299 (b) Detail of operation 1) The outdoor fan is stepped up by 3 speed step. (Upper limit 8th speed) 2) The lower limit of compressor command speed is set to 30 or 45 rps and even if the calculated result becomes lower than that after fuzzy calculation, the speed is kept to 30 or 45 rps.
  • Page 170 '21 • SRK-T-299 (c) Reset conditions When either of the following condition is satisfied 1) The outdoor air temperature (TH3) is D ˚C or higher. 2) The compressor command speed is 0 rps. (5) Heating high pressure control Model SRK50 (a) Starting condition When the indoor heat exchanger temperature (Thi-R) has risen to a specified temperature while the compressor is turned on.
  • Page 171 '21 • SRK-T-299 (7) Heating low outdoor temperature protective control (a) Protective control I 1) 　Operating conditions 　 2) 　Detail of operation changed as shown in the figure below. Lower limit 45 rps (FDTC 35:55 rps) Lower limit 40 rps Normal operation Outdoor air temperature(°C ) 3) Reset conditions...
  • Page 172 '21 • SRK-T-299 (10) Current cut (a) Purpose Inverter is protected from overcurrent. (b) Detail of operation Output current from the inverter is monitored with a shunt resistor and, if the current exceeds the setting value, the compressor is stopped immediately. Operation starts again after a delay time of 3 minutes. (11) Outdoor unit failure This is a function for determining when there is trouble with the outdoor unit during air-conditioning.
  • Page 173 '21 • SRK-T-299 (b) Heating 1) Operating conditions When the outdoor air temperature (TH3) is 0ºC (In addition SRC35:6ºC) or lower continues for 30 seconds while the compressor command speed is other than 0 rps 2) Detail of operation The outdoor fan is stepped up by 2 speed step at each 20 seconds. (Upper limit 8th speed (In addition SRC35:1 speed step up corresponding to inverter number of rotations when the outdoor air temperature (TH3) is 6ºC or lower)) 3) Reset conditions...
  • Page 174 '09•SRK-DB-087D '21 • SRK-T-299 Reference Reference 11. MAINTENANCE DATA 2 TROUBLESHOOTING PROCEDURES FOR ELECTRICAL EQUIPMENT 11.1 SRK, SRF & SRR series (1) Cautions (2) Items to check before troubleshooting source (3) Troubleshooting procedure (If the air-conditioner does not run at all) satisfied Important source...
  • Page 175 '09•SRK-DB-087D '21 • SRK-T-299 (4) Troubleshooting procedure (If the air-conditioner runs) 175. 176-182. 176-182.
  • Page 176 '21 • SRK-T-299 (5) Self-diagnosis table Wired Indoor unit display panel Description remote Cause Display (flashing) condition control TIMER of trouble display light light When a heat exchanger sensor 1 wire disconnection is detected • Broken heat exchanger sensor 1-time 1 wire, poor connector while operation is stopped.
  • Page 177 '09•SRK-DB-087D '21 • SRK-T-299 (6) Service mode (Trouble mode access function) (a) Explanation of terms Explanation Term The service mode is the mode where service data are displayed by flashing of the display lights Service mode when the operations in item (b) below are performed with the indoor control. These are the contents of error displays and protective stops which occurred in the past in the air- conditioner system.
  • Page 178 '09•SRK-DB-087D '21 • SRK-T-299 4-time flash 2-time flash. wireless mode mode Self-diagnosis data wireless mode mode Wireless remote control setting Contents of output data Operation mode Fan speed mode wireless Indicates the number of Wireless remote control setting occasions previous to the present Temperature setting the error display data are from.
  • Page 179 '09•SRK-DB-087D '21 • SRK-T-299 (Example) Wireless remote control setting Operation Displayed data Fan speed Temperature mode mode setting Displays the reason for the stop (error code) the previous time an error was displayed. 21ºC Displays the reason for the stop (error code) 2 times previous when an error was displayed. 22ºC Cooling 23ºC...
  • Page 180 '09•SRK-DB-087D '21 • SRK-T-299 (c) Error code, stop code table Number of flashes when in service mode Stop coad Error Auto TIMER Error content Cause Occurrence conditions display recovery light light Error coad (10's digit) (1's digit) Normal 1-time Error of wired remote control Broken wired remote control wire.
  • Page 181 '09•SRK-DB-087D '21 • SRK-T-299 4-time flash 2-time flash. (d) Operation mode, Fan speed mode information tables (ii) mode mode Display pattern when Display pattern when Fan speed in service mode in service mode Operation mode mode when when there is an there is an RUN light TIMER light...
  • Page 182 '09•SRK-DB-087D '21 • SRK-T-299 (e) Temperatare information (i) Room temperature sensor, indoor heat exchanger temperature sensor, outdoor air temperature sensor, outdoor heat exchanger temperature sensor Unit: °C TIMER light (1’s digit) RUN light (10’s digit) Buzzer sound (sounds for 0.1 second) (does not sound) temperature information Sensor value displayed when the error code is normal...
  • Page 183 '09•SRK-DB-087D '21 • SRK-T-299 (ii) Discharge pipe temperature sensor Unit: °C TIMER light (1’s digit) RUN light (10’s digit) Buzzer sound (sounds for 0.1 second) (does not sound) temperature information Sensor value displayed when the error code is normal -64ºC temperature sensor data 0.1 sec.
  • Page 184 '09•SRK-DB-087D '21 • SRK-T-299 Service data record form Wireless r Operation mode Fan speed mode Wireless r Wireless r Wireless r Wireless r Wireless r wireless 177.)
  • Page 185 '09•SRK-DB-087D '21 • SRK-T-299 (7) Inspection procedures corresponding to detail of trouble Sensor error Broken sensor wire, connector poor connection Temperature sensor characteristics (Room Discharge pipe temperature sensor characteristics temperature, indoor heat exchanger temperature, outdoor heat exchanger temperature, outdoor air temperature) (Short-circuit) (Short-circuit) - 10...
  • Page 186 '09•SRK-DB-087D '21 • SRK-T-299 Current cut Compressor lock, Compressor wiring short-circuit, Compressor output is open phase, Outdoor unit PCB is faulty, Service valve is closed, EEV is faulty, Compressor faulty. short-circuit? 193. unit ＊   Defective outdoor unit PCB ＊ Defective outdoor unit PCB between terminals.
  • Page 187 '09•SRK-DB-087D '21 • SRK-T-299 Over heat of compressor Gas shortage, defective discharge pipe temperature sensor temperature temperature 184) Defective outdoor unit PCB Error of signal transmission Wiring error including power cable, defective indoor/ outdoor unit PCB ② ③ unit ② ③ unit ①...
  • Page 188 '09•SRK-DB-087D '21 • SRK-T-299 Trouble of outdoor unit Insufficient refregerant amount, Faulty power transistor, Broken compressor wire Service valve close, Defective EEV, Defective outdoor unit PCB unit ◆  unit     defrost operation   minutes or more Notes (1) 193. (2) Check resistance between terminals, see page 185.
  • Page 189 '21 • SRK-T-299 Rotor lock Defective compressor, defective outdoor unit PCB unit between terminals. See page 185. Service valve (gas side) closed, Service valve (gas side) closed operation (8) Phenomenon observed after shortcircuit, wire breakage on sensor Defective outdoor unit PCB (a) Indoor unit Phenomenon Operation...
  • Page 190 '21 • SRK-T-299 (8) Phenomenon observed after short-circuit, wire breakage on sensor (a) Indoor unit Phenomenon Operation Sensor mode Short-circuit Disconnected wire Cooling Room temperature sensor Heating Heat exchanger Cooling Freezing cycle system protection trips and stops the compressor. temperature sensor Heating Cooling...
  • Page 191 '21 • SRK-T-299 (b) Indoor fan motor check procedure 1) Indoor unit PCB output check ① ④ ⑤ DC several V (–) DC 308-336V (4-6 V) Measuring Voltage range when DC15V point normal ①  −  ③ − Indoor unit PCB ⑥...
  • Page 192 Operation SW ON Measure in this section '21 • SRK-T-299 (10) How to make sure of wireless remote control wireless wireless wireless wireless wireless wireless   Simplified check method of wireless remote control It is normal if the signal transmission section of the wireless remote control emits a whitish light at each transmission on the monitor of digital camera.
  • Page 193 '21 • SRK-T-299 (12) Outdoor unit inspection points Models SRC20ZS-WA, 25ZS-WA2, 35ZS-WA2 ◆Check point of outdoor unit CAUTION- HIGH VOLTAGE ◆Power source and serial signal inspection High voltage is produced in the control box. Don't touch electrical parts in the control box for 5 minutes after the : AC220/230/240V unit is stopped.
  • Page 194 '21 • SRK-T-299 (a) Inspection of electronic expansion valve (ii) (iii) unit (iv) • Inspection of electronic expansion valve as a separate unit Measuring point Resistance when normal (b) Outdoor fan motor check procedure unit unit source ② unit unit Measuring Voltage range when point...
  • Page 195 '21 • SRK-T-299 11.2 FDTC series 11.2.1 Diagnosing of microcomputer circuit (1) Selfdiagnosis function (a) Check Indicator Table Whether a failure exists or not on the indoor unit and outdoor unit can be know by the contents of remote control error code, indoor unit green LED (power pilot lamp and microcomputer normality pilot lamp) or red LED (check pilot lamp).
  • Page 196 '21 • SRK-T-299 (ii) Outdoor unit Remote control Indoor unit control PCB Reference Location of trouble Description of trouble Repair method Green Error code Red LED Red LED page Installation, operation status • Higher outdoor heat exchanger temperature Repair Replacement, repair Outdoor heat exchanger Keeps •...
  • Page 197 '21 • SRK-T-299 (iv) Display sequence of error codes or inspection indicator lamps ■ Occurrence of one kind of error Displays are shown respectively according to errors. ■ Occurrence of plural kinds of error Section Category of display • Displays the error of higher priority (When plural errors are persisting) Error code on remote control Red LED on indoor...
  • Page 198 '21 • SRK-T-299 ■ Error log and reset Error indicator Memorized error log Reset • Stop the unit by pressing the ON/OFF Remote control display • Higher priority error is memorized. switch of remote control. • If the unit has recovered from anomaly, it Red LED on indoor unit control PCB •...
  • Page 199 '21 • SRK-T-299 (ii) Instruction of how to replace indoor unit control PCB 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. ●...
  • Page 200 ② Replace the PCB only after all the wirings connected to the connector are removed. ③ Fix the board such that it will not pinch any of the wires. ④ Switch setting must be same setting as that of the removed PCB. '21 •...
  • Page 201 '21 • SRK-T-299 (4) Troubleshooting at the outdoor unit When troubleshooting the outdoor unit, firstly assess the overview of malfunction and try to presume the cause and the faulty part by checking the error code dispalyed on the remote control and then proceed further inspection and remedy it. Self-diagnosis system by microcomputor on indoor unit PCB can assist to find the cause of malfunction smoothly by making a diagnosis of not only the anomaly of microcomputer, but also the anomaly in power source system, installation space, overload resulting from improper charging amount of refrigerant and etc.
  • Page 202 '21 • SRK-T-299 (5) Check of anomalous operation data with the remote control (a) In case of RC-EX3A remote control [Operating procedure] ➀ On the TOP screen, touch the buttons in the order of “Menu” ➝ “Service setting” ➝ “Service & Maintenance” ➝ “Service password”...
  • Page 203 '21 • SRK-T-299 (b) In case of RC-E5 remote control Data Item Number Operation data can be checked with remote control unit operation. (Operation Mode) (Set Temperature) ➀ Press the button. (Return Air Temperature) The display change “ ” (Remote Control Temperature Sensor) ➁...
  • Page 204 '21 • SRK-T-299 (6) Inverter checker for diagnosis of inverter output 　●Checking method 1) Setup procedure of checker a) Power OFF (Turn off the breaker). b) Remove the terminal cover of compressor and disconnect the wires (U, V, W) from compressor. c) Connect the wires U (Red) , V (White) and W (Black) of the checker to the terminal of disconnected wires (U, V, W) from compressor respectively.
  • Page 205 '21 • SRK-T-299 (7) Outdoor unit inspection points Models SRC25ZS-WA2, 35ZS-WA2 ◆Check point of outdoor unit CAUTION- HIGH VOLTAGE ◆Power source and serial signal inspection High voltage is produced in the control box. Don't touch electrical parts in the control box for 5 minutes after the : AC220/230/240V unit is stopped.
  • Page 206 '21 • SRK-T-299...
  • Page 207 '21 • SRK-T-299 11.2.2 Troubleshooting flow (1) List of troubles Remote control display Description of trouble Reference page None Operates but does not cool. None Operates but does not heat. None Earth leakage breaker activated None Excessive noise/vibration (1/3) None Excessive noise/vibration (2/3) None Excessive noise/vibration (3/3)

  • Page 208: Applicable Model

    '21 • SRK-T-299 (2) Troubleshooting Green Error code Content Remote control: None Operates but does not cool Keeps flashing Stays OFF Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Check the indoor fan operation. Check the temperature difference between return and supply air.
  • Page 209 '21 • SRK-T-299 Green Error code Content Remote control: None Operates but does not heat Keeps flashing Stays OFF Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Check the indoor fan operation. Check the temperature difference between return and supply air. It is normal.
  • Page 210 '21 • SRK-T-299 Green Error code Content Remote control: None Earth leakage breaker activated Stays OFF Stays OFF Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Are OK the insulation resistance and Replace compressor. resistance between terminals (1) of compressor? (1) 4.428Ω...
  • Page 211 '21 • SRK-T-299 Green Error code Content Remote control: None Excessive noise/vibration (1/3) – – Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure If excessive noise/vibration persists when sufficient Does time has elapsed after noise/vibration stopping the unit, it is occur during or soon after stopping operation considered that the air-...
  • Page 212 '21 • SRK-T-299 Green Error code Content Remote control: None Excessive noise/vibration (2/3) – – Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure From previous page Rearrange the piping to Are the pipes avoid contact with the contacting the casing.
  • Page 213 '21 • SRK-T-299 Green Error code Content Remote control: None Excessive noise/vibration (3/3) – – Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure From previous page If insufficient cooling/ [Adjustment heating problem happens during commissioning] due to anomalous operating Does noise/vibration occur when the conditions at cooling/ cooling/heating operation is in...
  • Page 214 '21 • SRK-T-299 Green Error code Content Louver motor failure Remote control: None Keeps flashing Stays OFF Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure ▲ Check at the indoor unit side. Operate after waiting for more than 1 minute. Does the louver operate at the power 2.
  • Page 215 '21 • SRK-T-299 Green Error code Content Power source system error Remote control: None (Power source to indoor unit control PCB) Indoor Stays OFF Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure AC220/240V detected between on the terminal block of indoor unit? AC380/415V...
  • Page 216 '21 • SRK-T-299 Green Error code Content Power source system error Remote control: None (Power source to remote control) Keeps flashing Stays OFF Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the connection of the Correct it. remote control's wiring OK? ➞...
  • Page 217 '21 • SRK-T-299 Green Error code Content INSPECT I/U Remote control: INSPECT I/U Keeps flashing Stays OFF Indoor (When 1 or 2 remote controls are connected) 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Are 2 units of remote control connected? ⑴，...
  • Page 218 '21 • SRK-T-299 Green Error code Content INSPECT I/U Remote control: INSPECT I/U Keeps flashing Stays OFF Indoor (Connection of 3 units or more remote controls) 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Are more than Reduce to 2 units or less. 3 units of remote control connected? Does remote...
  • Page 219 '21 • SRK-T-299 Green Error code Content Communication error at Remote control: WAIT initial operation (1/3) Indoor Keeps flashing Stays OFF 5. Troubleshooting 1. Applicable model All Models Diagnosis Countermeasure When the remote control LCD displays “ ” 2 WAIT minutes after the power on The remote control LCD Turn the breaker off once and then...
  • Page 220 '21 • SRK-T-299 Green Error code Content Communication error at Remote control: WAIT initial operation (2/3) Indoor Keeps flashing Stays OFF 5. Troubleshooting 1. Applicable model All Models Diagnosis Countermeasure When the fuse is blown, the method to inspect inverter before replacing the power Is there source fuse...
  • Page 221 '21 • SRK-T-299 Green Error code Content Communication error at Remote control: WAIT initial operation (3/3) Indoor Keeps flashing Stays OFF 5. Troubleshooting 1. Applicable model All Models Diagnosis Countermeasure When the remote control display is extinguished after the power on. Remote control display is extinguished after the power on.
  • Page 222 '21 • SRK-T-299 Green Error code Content No display Remote control: None Stays OFF Stays OFF Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Remote control does not display anything after the power on. Is DC10V or Defective remote control higher detected at remote control connection terminals? 2.
  • Page 223 '21 • SRK-T-299 Green Error code Content Remote control Remote control: Keeps flashing Stays OFF Indoor communication circuit error 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is it possible to Malfunction by noise reset normally by the Check peripheral power reset? environment.
  • Page 224 '21 • SRK-T-299 Green Error code Content Remote control: Communication error during operation Keeps flashing 2-time flash Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure ● In case that the outdoor unit red LED flashes 2-time Note (1) Inspect faulty connections (disconnection, looseness) on the outdoor unit terminal block.

  • Page 225: When The Temperature Sensor Detects -50°C Or Lower For 5 Seconds Continuously

    '21 • SRK-T-299 Green Error code Content Indoor heat exchanger Remote control: temperature sensor anomaly Keeps flashing 1-time flash Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the connection of indoor heat Correct it. exchanger temperature sensor ➞...
  • Page 226 '21 • SRK-T-299 Green Error code Content Return air temperature Remote control: sensor anomaly Keeps flashing 1-time flash Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the connection of return Correct it. air temperature sensor ➞ Connect connector. connector OK? 2.
  • Page 227 '21 • SRK-T-299 Green Error code Content Remote control: Heating overload operation Keeps flashing 1-time flash Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the air filter clogged? Wash. 2. Error detection method Is the indoor heat exchanger Defective indoor heat temperature sensor exchanger temperature...
  • Page 228 '21 • SRK-T-299 Green Error code Content Drain trouble Remote control: Keeps flashing 1-time flash Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Check the error data in the remote control. Is there any overflow? Is DC12V at CNI connector? Check float switch.
  • Page 229 '21 • SRK-T-299 Excessive number of connected Green Error code Content indoor units (more than 17 units) Remote control: Keeps flashing Stays OFF Indoor by controlling with one remote control 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Are more than 17 indoor units connected to one Defective remote control remote control?
  • Page 230 '21 • SRK-T-299 Green Green Error code Error code Content Content Address setting error of Remote control: Remote control: indoor units Keeps flashing Stays OFF Indoor Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure E11 occurs Is “Master IU address set”...
  • Page 231 '21 • SRK-T-299 Green Error code Content Indoor fan motor anomaly Remote control: Keeps flashing 1-time flash Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Does any foreign material Remove foreign material. intervene in rotational area of fan propeller? Does the fan 2.
  • Page 232 '21 • SRK-T-299 Green Error code Content Indoor unit operation check, Remote control: drain pump motor check setting error Keeps flashing 1-time flash Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure E19 occurs when the power ON Is SW7-1 Defective indoor unit on the indoor unit control PCB ON ?
  • Page 233 '21 • SRK-T-299 Green Error code Content Indoor fan motor rotation Remote control: speed anomaly Keeps flashing 1-time flash Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Does any foreign material Remove foreign material. intervene in rotational area of fan propeller? Does the fan 2.

  • Page 234: Table Of Contents

    '21 • SRK-T-299 Green Error code Content Remote control Remote control: temperature sensor anomaly Keeps flashing Stays OFF Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the remote Correct it. control temperature sensor connected properly? ➞Insert connector securely. 2.
  • Page 235 '21 • SRK-T-299 Green Error code Content Cooling overload operation Remote control: Indoor Keeps flashing Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure * For the characteristics of outdoor heat exchanger temperature Are the sensor, refer to E37. characteristics of outdoor heat exchanger Replace outdoor heat...
  • Page 236 '21 • SRK-T-299 Green Error code Content Discharge pipe temperature error Remote control: Keeps flashing Stays OFF Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure * For the characteristics of discharge Are the pipe temperature sensor, refer to E39. characteristics of Replace discharge pipe discharge pipe temperature...

  • Page 237: Are The Characteristics Of

    '21 • SRK-T-299 Green Error code Content Outdoor heat exchanger Remote control: temperature sensor anomaly Keeps flashing Stays OFF Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the outdoor heat exchanger temperature Correct connector. sensor connector connected properly? 2.
  • Page 238 '21 • SRK-T-299 Green Error code Content Outdoor air temperature Remote control: sensor anomaly Keeps flashing Stays OFF Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure the outdoor air Correct connector. temperature sensor connector connected properly? For the characteristics of outdoor air temperature sensor, see the following graph.
  • Page 239 '21 • SRK-T-299 Green Error code Content Discharge pipe Remote control: temperature sensor anomaly Indoor Keeps flashing Stays OFF 5. Troubleshooting 1. Applicable model Diagnosis Countermeasure All models Is the discharge pipe temperature sensor Correct connector. connector connected properly? 2. Error detection method For the characteristics of discharge pipe Are the temperature sensor, see the following graph.
  • Page 240 '21 • SRK-T-299 Green Error code Content Service valve (gas side) closing operation Remote control: Indoor Keeps flashing Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Are the Open the service valve. service valve (gas side) opened? 2.
  • Page 241 '21 • SRK-T-299 Green Error code Content Current cut (1/2) Remote control: Keeps flashing Stays OFF Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the Power source Check power source. voltage OK? 2. Error detection method Are the Open the valves.
  • Page 242 '21 • SRK-T-299 Green Error code Content Current cut (2/2) Remote control: Keeps flashing Stays OFF Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure From previous page Is the checked result of power Defective outdoor unit transistor module PCB➞Replace.
  • Page 243 '21 • SRK-T-299 Green Error code Content Remote control: Active filter voltage error Indoor Keeps flashing Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Restore normal condition. Is the power source normal? 2. Error detection method Is voltage Restore normal condition.
  • Page 244 '21 • SRK-T-299 Green Error code Content Outdoor fan motor anomaly Remote control: Indoor Keeps flashing Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Does any foreign material intervene Remove foreign matter. in rotational area of fan propeller? Does the 2.
  • Page 245 '21 • SRK-T-299 Green Green Error code Error code Content Content Power transistor error Power transistor anomaly Remote controller: E51 Remote control: Indoor Keeps flashing Stays OFF Keeps flashing Stays Off Indoor (Models SRC50, 60) 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure...
  • Page 246 '21 • SRK-T-299 Green Error code Content Insufficient refrigerant amount Remote control: or detection of service valve closure Indoor Keeps flashing Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the Open fully. service valve fully opened? Are the connections of indoor heat exchanger and/or return air...
  • Page 247 '21 • SRK-T-299 Green Error code Green Content Error code Content Current safe stop Current safe stop Keeps flashing Stays Off Indoor Remote controller: E58 Remote control: Indoor Keeps flashing Stays OFF (Model SRC50, 60) 3 time flash Outdoor ― 5.
  • Page 248 '21 • SRK-T-299 Green Error code Content Compressor startup failure Remote control: Indoor Keeps flashing Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Disconnect the outdoor fan motor Compressor does not start at all. connector and try to startup. Neither noise nor vibration cannot be heard.
  • Page 249 '21 • SRK-T-299 Green Error code Content Compressor rotor lock error Remote control: Indoor Keeps flashing Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the Check and correct the power source voltage power source voltage. Reset the power source and restart operation. 2.
  • Page 250 '21 • SRK-T-299 12. OPTION PARTS PJZ012A171 12.1 Wired remote control (1) Model RC-EX3A 　 1 . Safety precautions ● Please read this manual carefully before starting installation work to install the unit properly. Every one of the followings is important information to be observed strictly. Failure to follow these instructions properly may result in serious WARNING consequences such as death, severe injury, etc.
  • Page 251 '21 • SRK-T-299 　 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 252 '21 • SRK-T-299 　 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 253 '21 • SRK-T-299 　 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 100 m, Item name Q’ty...
  • Page 254 '21 • SRK-T-299 　 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 255 ブッ シング パテで シール する こ と '21 • SRK-T-299 　 リ モコ ン配線 ③ Connect wires from X and Y terminals of R/C to X and Y terminals of indoor unit. R/C wires (X, Y) have no polarity. Fix wires such that the wires will run around the terminal screws on the top case of R/C.
  • Page 256 '21 • SRK-T-299 　 5 . Main/Sub setting when more than one remote control are used Up to two units of R/C can be used R/C operations Main Sub R/C operations Main Sub Service Installation Installation date × Run/Stop, Change set temp., at the maximum for 1 indoor unit or 1 setting settings...
  • Page 257 '21 • SRK-T-299 (2) Model RC-E5 PJA012D730 Installation manual for wired remote controller Connect the remote con terminal block. Connect the terminal of Read together with indoor unit's installation manual. with the terminal of indo (X and Y are no polarity) WARNING Wiring route is as shown Fasten the wiring to the terminal securely and hold the cable securely so as not to apply unexpected stress on the...
  • Page 258 '21 • SRK-T-299 ote controller Connect the remote control cord to the Sheath Sheath The range of temperature settin terminal block. When shipped, the range of set te Connect the terminal of remote control (X,Y) Upper case Upper case Board Board Heating : 16 ~ 30˚C (55 ~ 86˚F with the terminal of indoor unit (X,Y).
  • Page 259 '21 • SRK-T-299 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 260 '21 • SRK-T-299 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 261 '21 • SRK-T-299 PJA012D730 omatically defined as following table. Operation message How to set function Function description: ndoor unit. 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 262 '21 • SRK-T-299 12.2 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 263 '21 • SRK-T-299 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 264 '21 • SRK-T-299 3. Master/ s In case of exposing cord △ Simple Remote Control Installation Manual PJZ012D069 ⑴　 Make certain to remove a screw on the bottom surface of the ⑴　 Up to two r remote control. Read together with indoor unit's installation manual. WARNING ⑴...
  • Page 265 '21 • SRK-T-299 3. Master/ slave setting when more than one remote control are used ⑴　 Up to two remote controls can be connected to one unit (or one group) of indoor unit. Switch Setting Function detail Slave remote control Indoor unit SW1-1 Master remote control...
  • Page 266 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 267 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, × 2 cores return to the indoor unit selection display (example, “U 000”). ×...
  • Page 268 '21 • SRK-T-299 PJF012D506 12.3 Wireless kit (FDTC only) • FDTC series (RCN-TC-5AW-E3) 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 269 '21 • SRK-T-299 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 270 '21 • SRK-T-299 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 271 '21 • SRK-T-299 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 272 '21 • SRK-T-299 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 273 '21 • SRK-T-299 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 274 '21 • SRK-T-299 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 275 '21 • SRK-T-299 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 276 '21 • SRK-T-299 12.4 Motion sensor kit (FDTC only) (1) FDTC series (LB-TC-5W-E) △ PJF012D504 WARNING ● Connect the wiring to the PCB in the control box on the indoor unit and fix the wiring ① Cu securely so as not to apply unexpected stress on the PCB. ②...
  • Page 277 Motion sensor '21 • SRK-T-299 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 278 12D504 '21 • SRK-T-299 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 279 '21 • SRK-T-299 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 280 Thank you very much for your purchase of this packaged air conditioning system and motion sensor (2) User’s manual kit by Mitsubishi Heavy Industries. This user's manual describes cautions for safety. Please read it PJZ012A164 along with the indoor unit and remote control user's manual.
  • Page 281 mode” will be displayed on the message display. In auto-off mode F1: High power F2: Energy-saving F1: High power F2: Energy-saving “Complete stop”... When auto-off is enabled, the unit stops. The unit will not resume operation even when human presence is detected. '21 •...
  • Page 282 '21 • SRK-T-299 12.5 Interface kit (SC-BIKN2-E) ※ When RC-EX3A is connected, please use SC-BIKN2-E by all means. RKZ012A099 Accessories included in package Safety precautions Before use, please read these Safety precautions thoroughly before installation. Be sure to check all the accessories included in package. ●All the cautionary items mentioned below are important safety related items to be taken into consideration, so be sure to observe them at all times.
  • Page 283 '21 • SRK-T-299 Installation of the interface ・Install the interface within the range of the connection cable length (approximately 1.3m) from the indoor unit. Wiring inlet ・Be sure not to extend the connection cable on site. If the connection cable is extended, malfunction may occur. ・Fix the interface on the wall, pillar or the like.
  • Page 284 '21 • SRK-T-299 Functions of CnT connector It is available to operate the air-conditioner and to monitor the operation status with the external control unit (remote display) by sending the input/output signal through CnT connector on the indoor control PCB. Note (1) 0.3mm 0.75mm ×2m...
  • Page 285 '21 • SRK-T-299 Connection of wired remote control Regarding the connection of wired remote control, refer to the installation manual of wired remote control. ①Switch ON the DIP switch SW2-2 (Factory setting : ON) on the interface PCB. DIP suitch Caution:Wireless remote control attached to the indoor unit can be used in parallel, after connecting the wired remote control.
  • Page 286 '21 • SRK-T-299 12.6 Superlink E board (SC-ADNA-E)
  • Page 287 '21 • SRK-T-299...
  • Page 288 '21 • SRK-T-299 12.7 Ceiling concealed type (SRR) option parts 12.6 Ceiling concealed type (SRR) option pats (1) Bottom air inlet kit RJZ012A040 (1) Bottom air inlet kit This manual contains installation points for BOTTOM AIR INLET KIT manufactured by MHI. Carry out the work following the instructions below.
  • Page 289 '21 • SRK-T-299 (2) Remote sensor kit (SC-THB-E3) (2) Remote sensor kit (SC-THB-E3) Sensor for return air temperature detection is located in the air inlet of the indoor unit. Use the remote sensor kit SC-THB-E3, and install it on the suitable wall so the temperature of the room can be accurately detected.
  • Page 290 '21 • SRK-T-299 ( f ) Cut wiring from 1 & 2 pins of CnG connector. (wiring length : about 100 mm from the connector) If the pre-installed return air temperature sensor ASSY is not removed, the end of the sensor wiring should prevent a short circuit by insulating tape etc.
  • Page 291 '21 • SRK-T-299 12.8 OA spacer (FDTC only) ② △ 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 FDTC25-60VH...
  • Page 292 '21 • SRK-T-299 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 293 '21 • SRK-T-299 ④ Installation of OA spacer on the indoor unit ⑤ 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 294 '21 • SRK-T-299 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 295 '21 • SRK-T-299 DUCT JOINT FOR FDTC 12.9 Duct joint (FDTC only) 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 296 Contact details for obtaining Name and address of the manufacturer or of its authorised representative. more information Mitsubishi Heavy Industries Air-Conditioning Europe, Ltd. 5 The Square, Stockley Park, Uxbridge, Middlesex, UB11 1ET,United Kingdom MHIAE SERVICES B.V. Herikerbergweg 238, Luna ArenA, 1101 CM Amsterdam, Netherlands...
  • Page 297 Contact details for obtaining Name and address of the manufacturer or of its authorised representative. more information Mitsubishi Heavy Industries Air-Conditioning Europe, Ltd. 5 The Square, Stockley Park, Uxbridge, Middlesex, UB11 1ET,United Kingdom MHIAE SERVICES B.V. Herikerbergweg 238, Luna ArenA, 1101 CM Amsterdam, Netherlands...
  • Page 298 Contact details for obtaining Name and address of the manufacturer or of its authorised representative. more information Mitsubishi Heavy Industries Air-Conditioning Europe, Ltd. 5 The Square, Stockley Park, Uxbridge, Middlesex, UB11 1ET,United Kingdom MHIAE SERVICES B.V. Herikerbergweg 238, Luna ArenA, 1101 CM Amsterdam, Netherlands...
  • Page 299 Contact details for obtaining Name and address of the manufacturer or of its authorised representative. more information Mitsubishi Heavy Industries Air-Conditioning Europe, Ltd. 5 The Square, Stockley Park, Uxbridge, Middlesex, UB11 1ET,United Kingdom MHIAE SERVICES B.V. Herikerbergweg 238, Luna ArenA, 1101 CM Amsterdam, Netherlands...
  • Page 300 Contact details for obtaining Name and address of the manufacturer or of its authorised representative. more information Mitsubishi Heavy Industries Air-Conditioning Europe, Ltd. 5 The Square, Stockley Park, Uxbridge, Middlesex, UB11 1ET,United Kingdom MHIAE SERVICES B.V. Herikerbergweg 238, Luna ArenA, 1101 CM Amsterdam, Netherlands...
  • Page 301 Contact details for obtaining Name and address of the manufacturer or of its authorised representative. more information Mitsubishi Heavy Industries Air-Conditioning Europe, Ltd. 5 The Square, Stockley Park, Uxbridge, Middlesex, UB11 1ET,United Kingdom MHIAE SERVICES B.V. Herikerbergweg 238, Luna ArenA, 1101 CM Amsterdam, Netherlands...
  • Page 302 Contact details for obtaining Name and address of the manufacturer or of its authorised representative. more information Mitsubishi Heavy Industries Air-Conditioning Europe, Ltd. 5 The Square, Stockley Park, Uxbridge, Middlesex, UB11 1ET,United Kingdom MHIAE SERVICES B.V. Herikerbergweg 238, Luna ArenA, 1101 CM Amsterdam, Netherlands...
  • Page 303 Contact details for obtaining Name and address of the manufacturer or of its authorised representative. more information Mitsubishi Heavy Industries Air-Conditioning Europe, Ltd. 5 The Square, Stockley Park, Uxbridge, Middlesex, UB11 1ET,United Kingdom MHIAE SERVICES B.V. Herikerbergweg 238, Luna ArenA, 1101 CM Amsterdam, Netherlands...
  • Page 304 Contact details for obtaining Name and address of the manufacturer or of its authorised representative. more information Mitsubishi Heavy Industries Air-Conditioning Europe, Ltd. 5 The Square, Stockley Park, Uxbridge, Middlesex, UB11 1ET,United Kingdom MHIAE SERVICES B.V. Herikerbergweg 238, Luna ArenA, 1101 CM Amsterdam, Netherlands...
  • Page 305 Contact details for obtaining Name and address of the manufacturer or of its authorised representative. more information Mitsubishi Heavy Industries Air-Conditioning Europe, Ltd. 5 The Square, Stockley Park, Uxbridge, Middlesex, UB11 1ET,United Kingdom MHIAE SERVICES B.V. Herikerbergweg 238, Luna ArenA, 1101 CM Amsterdam, Netherlands...
  • Page 306 Contact details for obtaining Name and address of the manufacturer or of its authorised representative. more information Mitsubishi Heavy Industries Air-Conditioning Europe, Ltd. 5 The Square, Stockley Park, Uxbridge, Middlesex, UB11 1ET,United Kingdom MHIAE SERVICES B.V. Herikerbergweg 238, Luna ArenA, 1101 CM Amsterdam, Netherlands...
  • Page 307 Contact details for obtaining Name and address of the manufacturer or of its authorised representative. more information Mitsubishi Heavy Industries Air-Conditioning Europe, Ltd. 5 The Square, Stockley Park, Uxbridge, Middlesex, UB11 1ET,United Kingdom MHIAE SERVICES B.V. Herikerbergweg 238, Luna ArenA, 1101 CM Amsterdam, Netherlands...
  • Page 308 Contact details for obtaining Name and address of the manufacturer or of its authorised representative. more information Mitsubishi Heavy Industries Air-Conditioning Europe, Ltd. 5 The Square, Stockley Park, Uxbridge, Middlesex, UB11 1ET,United Kingdom MHIAE SERVICES B.V. Herikerbergweg 238, Luna ArenA, 1101 CM Amsterdam, Netherlands...
  • Page 309 Contact details for obtaining Name and address of the manufacturer or of its authorised representative. more information Mitsubishi Heavy Industries Air-Conditioning Europe, Ltd. 5 The Square, Stockley Park, Uxbridge, Middlesex, UB11 1ET,United Kingdom MHIAE SERVICES B.V. Herikerbergweg 238, Luna ArenA, 1101 CM Amsterdam, Netherlands...
  • Page 310 Contact details for obtaining Name and address of the manufacturer or of its authorised representative. more information Mitsubishi Heavy Industries Air-Conditioning Europe, Ltd. 5 The Square, Stockley Park, Uxbridge, Middlesex, UB11 1ET,United Kingdom MHIAE SERVICES B.V. Herikerbergweg 238, Luna ArenA, 1101 CM Amsterdam, Netherlands...
  • Page 311 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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