Mitsubishi Heavy Industries SRR25ZJ-S Technical Manual
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Mitsubishi Heavy Industries SRR25ZJ-S Technical Manual

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TECHNICAL MANUAL
INVERTER RESIDENTIAL AIR-CONDITIONERS

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Summary of Contents for Mitsubishi Heavy Industries SRR25ZJ-S

  • Page 1 TECHNICAL MANUAL INVERTER RESIDENTIAL AIR-CONDITIONERS...

  • Page 2: Table Of Contents

    '14 • SR-T-157 CONTENTS 1. SPECIFICATIONS ..................(1) Ceiling concealed type (SRR) .............. (2) 4way ceiling cassette type (FDTC) ............2. EXTERIOR DIMENSIONS ................(1) Indoor units ................... (2) Outdoor units ..................10 (3) Remote control ..................11 3. ELECTRICAL WIRING ................. 13 (1) Indoor units ...................
  • Page 3 '14 • SR-T-157 (13) Protective control function ..............50 ................56 9.2 Models FDTC25,35VF (1) Remote control (option parts) ............... 56 (2) Operation control function by the wired remote control ......57 (3) Operation control function by the indoor control ........
  • Page 4 '14 • SR-T-157 12. TECHNICAL INFORMATION ................169 (1) Ceiling concealed type (SRR) ...............169 (2) 4way ceiling cassette type (FDTC) ............171 ■How to read the model name Example: SRR 25 Z JX-S Series code Inverter type Product capacity (Cooling capacity) Model name SRR : Ceiling concealed type SRC : Outdoor unit Example: FDTC 25 VF...

  • Page 5: Ceiling Concealed Type (Srr)

    1. SPECIFICATIONS (1) Ceiling concealed type (SRR) Adapted to RoHS directive SRR25ZJ-S Model Item Indoor unit SRR25ZJ-S Outdoor unit SRC25ZMX-S Power source 1 Phase, 220 - 240V, 50Hz Nominal cooling capacity (range) 2.5 ( 0.9 (Min.) - 3.2 (Max.)) Nominal heating capacity (range) 3.4 ( 0.9 (Min.) ~ 4.7 (Max.))
  • Page 6 '14 • SR-T-157 SRR35ZJ-S Model Item Indoor unit SRR35ZJ-S Outdoor unit SRC35ZMX-S 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 ( 0.9 (Min.) ~ 5.1 (Max.)) Cooling 1.080 ( 0.19 ~ 1.26 ) Power...

  • Page 7: Way Ceiling Cassette Type (Fdtc)

    '14 • SR-T-157 (2) 4way ceiling cassette type (FDTC) FDTC25VF Model Indoor unit FDTC25VF Outdoor unit SRC25ZMX-S Item Panel: TC-PSA-25W-E Power source 1 Phase, 220 - 240V, 50Hz Nominal cooling capacity (range) 2.55 [ 0.9(Min.) ~ 3.2(Max.)] Nominal heating capacity (range) 3.45 [ 0.9(Min.) ~4.7(Max.)] Cooling Power...
  • Page 8 '14 • SR-T-157 FDTC35VF Model Indoor unit FDTC35VF Outdoor unit SRC35ZMX-S Item Panel: TC-PSA-25W-E Power source 1 Phase, 220 - 240V, 50Hz Nominal cooling capacity (range) 3.6 ( 0.9 (Min.) ~ 4.1 (Max.)) Nominal heating capacity (range) 4.25 ( 0.9 (Min.) ~ 5.1 (Max.)) Cooling 1.07 Power...

  • Page 9: Exterior Dimensions

    '14 • SR-T-157 2. EXTERIOR DIMENSIONS (1) Indoor units (a) Ceiling concealed type (SRR) Models SRR25ZJ-S, 35ZJ-S 325.4 Content Symbol Control Box SRR25ZJ-S, Model 35ZJ-S φ9.52（3／8"） Gas piping （Flare） Liquid piping φ6.35（1／4"）（Flare） Drain piping VP16 Suspension bolts （M8） （φ35） Power supply intake...
  • Page 10 Symbol Content Decorative panel Gas piping φ 9.52 （3／8"） （ Flare） Suspension bolts pitch （ ） Liquid piping φ 6.35 （ 1／4"） （ Flare） Drain piping VP20 （ I.D.20,O.D.26） Note （ 2） Hole for wiring φ 25 Suspension bolts （M10 or M8） Air outlet opening （Knock out）...
  • Page 11 Notes Symbol Content （1） It must not be surrounded by walls on the four sides. 　（2） The unit must be fixed with anchor bolts. An anchor bolt must not Service valve connection（gas side） φ9.52（3／8"）（Flare） protrude more than 15mm. Service valve connection（liquid side） φ6.35（1／4"）（Flare） 　（3）...
  • Page 12 '14 • SR-T-157 (3) Remete control Unit: mm Models SRR series 17.3 Model FDTC series (Option parts)
  • Page 13 '14 • SR-T-157 (b) Wired remote control (option parts) 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...

  • Page 14: Outdoor Units

    CONTROL INTERFACE KIT SC-BIKN-E 250V 0.16A S／N 1～ 250V 3.15A Y／G PRINTED CIRCUIT BOARD 1 2/N Power source 1 phase 220 - 240 V 50Hz DISPLAY TO OUTDOOR UNIT WIRELESS TO OUTDOOR UNIT RECEIVER POWER WIRES Color Marks Meaning of Marks SIGNAL WIRE Mark Color...

  • Page 15: Remote Control

    Color Marks LED ・ 3 Indication lamp （ Red-Inspection） Terminal block （ Power source） Mark Color CNB∼Z Connector （□ mark） Drain motor LM1∼4 Louver motor BK Black Terminal block （ Signal line） （ □mark） F200∼203 Fuse Blue Remote control communication Thermistor （Remote control）...

  • Page 16: Outdoor Units

    TO INDOOR UNIT POWER WIRES SIGNAL WIRE PCB ASSY PWB1 TERMINAL POWER SOURCE POWER BLOCK TRANSISTOR ∼220ｰ240V 50Hz 250V 15A （BK） （BK）R.IN （RD） 250V 20A （WH） NOISE （WH） 3～ S.IN FILTER （BK） （Y／G） （RD） C-2 SWITCHING F3 250V 1A 250V 3.15A POWER CIRCUIT CIRCUIT...

  • Page 17: Noise Level

    '14 • SR-T-157 4. NOISE LEVEL (1) Ceiling concealed type (SRR) Model SRR25ZJ-S Condition ISO-T1, JIS C 9612 (Indoor Unit) Mike position Model SRR25ZJ-S Unit Cooling 40 dB(A) Noise 1.5 m Level Heating 41 dB(A) Mike (at center & below unit) ×...
  • Page 18 '14 • SR-T-157 Model SRR35ZJ-S Condition ISO-T1, JIS C 9612 (Indoor Unit) Mike position Model SRR35ZJ-S Unit Noise Cooling 42 dB(A) 1.5 m Level Heating 43 dB(A) Mike (at center & below unit) × ..Cooling, Heating Mike position 0.8m Unit Mike position (Center &...

  • Page 19: Way Ceiling Cassette Type (Fdtc)

    '14 • SR-T-157 (2) 4way ceiling cassette type (FDTC) Model FDTC25VF Condition ISO-T1,JIS C 9612 (Indoor Unit) Mike position Model FDTC25VF Noise Cooling 38 dB(A) Level Heating 39 dB(A) 1.5 m × ..Cooling, Heating Mike position 0.8m Unit Mike position (Center &...
  • Page 20 '14 • SR-T-157 Model FDTC35VF Condition ISO-T1,JIS C 9612 (Indoor Unit) Mike position Model FDTC35VF Noise Cooling 41 dB(A) Level Heating 43 dB(A) 1.5 m × ..Cooling, Heating Mike position 0.8m Unit Mike position (Center & Low points) 1000 2000 4000 8000...

  • Page 21: Piping System

    '14 • SR-T-157 5. PIPING SYSTEM Models SRK20ZJX-S, 25ZJX-S, 35ZJX-S Models SRR25ZJ-S, 35ZJ-S FDTC25VF, 35VF Cooling cycle Heating cycle Indoor unit Outdoor unit Outdoor air Flare temp. sensor connection Service valve (TH2) (Gas) Discharge pipe temp. sensor Gas pipe Check joint...

  • Page 22: Range Of Usage & Limitations

    '14 • SR-T-157 6. RANGE OF USAGE & LIMITATIONS RANGE OF USAGE & LIMITATIONS Models SRR25,35ZJ-S FDTC25,35VF Item Cooling operation : Approximately 18 to 32℃ D.B. Indoor return air temperature Heating operation : Approximately 15 to 30℃ D.B. (Upper, lower limits) (Refer to the selection chart) Cooling operation : Approximately -15 to 46℃...
  • Page 23 '09•SRK-DB-087D '14 • SR-T-157 (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 0.95 0.935 Heating (3) Correction relative to frosting on outdoor heat exchanger during heating Air inlet temperature of 5 or more outdoor unit in °C WB...

  • Page 24: Capacity Tables

    '14 • SR-T-157 7. CAPACITY TABLES (1) Ceiling concealed type (SRR) Model SRR25ZJ-S Cooling Mode (kW) Heating Mode (HC) (kW) Indoor air temp indoor air temp outdoor 21˚CDB 23˚CDB 26˚CDB 27˚CDB 28˚CDB 31˚CDB 33˚CDB Air flow Outdoor air temp. Air flow air temp.

  • Page 25: Way Ceiling Cassette Type (Fdtc)

    '14 • SR-T-157 (2) 4way ceiling cassette type (FDTC) Model FDTC25VF Cooling Mode (kW) Heating Mode (HC) (kW) Indoor air temp indoor air temp outdoor 21˚CDB 23˚CDB 26˚CDB 27˚CDB 28˚CDB 31˚CDB 33˚CDB Air flow Outdoor air temp. Air flow air temp. 14˚CWB 16˚CWB 18˚CWB...

  • Page 26: Electrical Wiring

    (1) Ceiling concealod type (SRR) RJD012A201B FOR MODEL SRR SERIES R410A REFRIGERANT USED Models SRR25ZJ-S, 35ZJ-S WARNING INSTALLATION MANUAL FOR INDOOR UNIT • Do not vent R410A into the atmosphere : R410A is a fluorinated • Do not perform any change of protective device itself or its setup greenhouse gas, covered by the Kyoto Protocol with Groval condition.

  • Page 27: Indoor Unit

    seriously affect the user’s health and safety. This can also cause the insulation and over-current etc. • Locations where an equipment affected by high harmonics is placed (TV • Do not touch any refrigerant pipes with your hands when the corrosion of the indoor unit and a resultant unit failure or refrigerant leak.
  • Page 28 (2) Connection Plan Indoor Liquid side Gas side Drain hose Liquid side pipes (Do not (Connection opening diameter ø16) Securing the ceiling hanging bolts INSTALLATION OF INDOOR UNIT Connecting the Drain Hose If steel embedded ceiling If wooden ceiling HEAT INSU Drilling of holes in the wall and fixture of sleeve Holes for ceiling hanging bolts ⑪...
  • Page 29 ○ Connect the pipes on both liquid and gas sides. Liquid side ○ Tighten the nuts to the following torque. Gas side Liquid side : 14.0 ~ 18.0 N·m (1.4 ~ 1.8 kgf·m) Drain hose Liquid side pipes Gas side (φ9.52) : 33.0 ~ 42.0 N·m (3.3 ~ 4.2 kgf·m) (Do not turn) (Connection opening diameter ø16) (φ12.7) : 49.0 ~ 61.0 N·m (4.9 ~ 6.1 kgf·m)

  • Page 30: Way Ceiling Cassette Type (Fdtc)

    '14 • SR-T-157 (2) 4way ceiling cassette type (FDTC) Models FDTC25VF, 35VF...
  • Page 31 '14 • SR-T-157 2D786 2D786 ① Before installation ③ Preparation before installation D781 l Install correctly according to the installation manual. l If suspension bolt becomes longer, do reinforcement of earthquake resistant. l Confirm the following points:  For grid ceiling ...
  • Page 32 '14 • SR-T-157 ④ ⑥ ⑥ Installation of indoor unit (continued) Drain pipe (continued) 6. Make sure to install the indoor unit horizontally. Confirm the Work procedure Drain tes levelness of the indoor unit with a level gauge or transparent 1.
  • Page 33 '14 • SR-T-157 ⑥ ⑥ ⑥ ⑧ ⑧ ⑧ Drain pipe (continued) Drain pipe (continued) Drain pipe (continued) Panel installation Panel installation Panel installation Drain test Drain test Drain test l After wiring work finished, install the panel on the indoor unit. l After wiring work finished, install the panel on the indoor unit.
  • Page 34 '14 • SR-T-157 PJA012D783 (See page 29.)
  • Page 35 '14 • SR-T-157 * 1 This function is not able to be set with wireless remote controls or simple remote control (RCH-H3). * 1 This function is not able to be set with wireless remote controls or simple remote control (RCH-H3). * 1 This function is not able to be set with wireless remote controls or simple remote control (RCH-H3).

  • Page 36: Installation Manual For Outdoor Unit

    RWC012A037 Models SRC25ZMX-S, 35ZMX-S INSTALLATION MANUAL FOR OUTDOOR UNIT SRC20·25·35·50 Model DXC09·12·18 R410A REFRIGERANT USED • This installation manual deals with outdoor units and general installation specifications only. For indoor units, refer to page 25. • When install the unit, be sure to check whether the selection of installation place, power supply specifications, usage limitation (piping length, height differences between indoor and outdoor units, power supply voltage and etc.) and installation spaces.
  • Page 37 CAUTION • Carry out the electrical work for ground lead with care. Do not connect the ground lead to the gas line, water line, lightning conductor or telephone line’s ground lead. Incorrect grounding can cause unit faults such as electric shocks due to short-circuiting. •...
  • Page 38 1. HAULAGE AND INSTALLATION (Take particular care in carrying in or moving the unit, and always perform such an operation with two or more persons.) When a unit is hoisted with slings for haulage, take into consideration the offset of its gravity center position. CAUTION If not properly balanced, the unit can be thrown off-balance and fall.

  • Page 39: Refrigerant Piping Work

    2. REFRIGERANT PIPING WORK 1) Restrictions on unit installation and use • Check the following points in light of the indoor unit specifications and the installation site. • Observe the following restrictions on unit installation and use. Improper installation can result in a compressor failure or performance degradation. •...
  • Page 40 5) Air tightness test Gas side Although outdoor and indoor units themselves have been tested for air tightness at the factory, check the connecting pipes after the installation work for air tightness from the service service valve valve’s check joint equipped on the outdoor unit side. While conducting a test, keep the service valve shut all the time. Outdoor unit Check joint Indoor unit...

  • Page 41: Drain Piping Work

    3. DRAIN PIPING WORK Model SRC20 ~ 35/DXC09,12 Model SRC50/DXC18 • Execute drain piping by using a drain elbow and drain CAUTION • When condensed water needs to be led to a drain, etc., install grommets supplied separately as accessories, where the unit on a flat base (supplied separately as an optional part) water drained from the outdoor unit is a problem.
  • Page 42 Power cable, indoor - outdoor connecting wire circuit diagram Model SRC20 ~ 35ZM-S Model SRC20 ~ 35ZMA-S Power supply terminal block Model SRC20 ~ 35ZMX-S Model SRC20 ~ 35ZMXA-S Model DXC09,12ZMA-S Cable clamp • It holds cables in place and protect the terminal connection from external force.

  • Page 43: After Installation

    5. UTILIZATION OF EXISTING PIPING <Table of pipe size restrictions> Check whether an existing pipe system is reusable or not by using the following flow chart. ◎: Standard pipe size START Additional charge volume per meter of pipe 0.02kg/m Liquid pipe ø6.35 Please consult with our distributor in the area, Are an outdoor unit and an indoor unit connected to the...

  • Page 44: Outline Of Operation Control By Microcomputer

    '14 • SR-T-157 9. OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER 9.1 Models SRR25ZJ-S,35ZJ-S (1) Operation control function by remote control Operation section Model All models FAN SPEED button OPERATION MODE select button Each time the button is pressed, the Each time the button pressed, the display is switched over in turn.

  • Page 45: Unit On/Off Button

    TIMER light (yellow) Illum Illuminates during TIMER operation. '14 • SR-T-157 Illum Unit ON/OFF button When the remote control batteries become weak, or if the remote control is lost or malfunctioning, this button may be used to turn the unit on and off. Operation Push the button once to place the unit in the automatic mode.

  • Page 46: Selection Of The Annual Cooling Function

    '14 • SR-T-157 (5) Selection of the annual cooling function (a) The annual cooling function can be enabled or disabled by means of the jumper wire (J172) on the in- door unit PCB and the dip switch (SW2-4) on the interface kit (option) PCB. Interface kit Jumper wire (SC-BIKN-E)

  • Page 47: Economy Operation

    '14 • SR-T-157 (7) Economy operation (7) Economy operation Pressing the HI POWER/ECONO button initiate a soft operation with the power suppressed in order to avoid an excessive cooling Pressing the HI POWER/ECONO button initiate a soft operation with the power suppressed in order to avoid an excessive cooling or heating.
  • Page 48 '14 • SR-T-157 Model SRR25ZJ-S SRR35ZJ-S Fan speed 30~102rps 30~115rps Auto 30~102rps 30~115rps 30~72rps 30~76rps 30~42rps 30~46rps When the defrosting, protection device, etc. is actuated, operation is performed in the corresponding mode. (ii) Hot keep operation If the hot keep operation is selected during the heating operation, the indoor blower is controlled based on the temperature of the indoor heat exchanger (Th2) to prevent blowing of cool wind.

  • Page 49: Outline Of Cooling Operation

    Detail of control in each mode (Pattern) Fuzzy operation During the fuzzy operation, the air flow and the compressor speed are controlled by calculating the difference be- tween the indoor temperature setting correction temperature and the retum air temperature. Model SRR25ZJ-S SRR35ZJ-S Fan speed 20~74rps 20~110rps...

  • Page 50: Outline Of Automatic Operation

    '14 • SR-T-157 (12) Outline of automatic operation Determination of operation mode The unit checks the indoor air temperature and the outdoor air temperature, determines the operation mode, and then be- gins in the automatic operation. Cooling 27.5 25.5 Dehumidifying Indoor air temperature (˚C) 19.5 Heating...

  • Page 51: Protective Control Function

    '14 • SR-T-157 (13) Protective control function Frost prevention control (During cooling or dehumidifying) Operating conditions Indoor heat exchanger temperature (Th2) is lower than 5ºC. compressor command 5 minutes after reaching the compressor command speed except 0 rps. speed (ii) Detail of anti-frost operation Lower limit Indoor heat exchanger...
  • Page 52 '14 • SR-T-157 Cooling low outdoor temperature protective control Operating conditions: When the outdoor air temperature (TH2) is 22ºC or lower continues for 20 seconds while the compressor command speed is other than 0 rps. (ii) Detail of operation: 1) The lower limit of the compressor command speed is set to 44 (30) rps and even if the speed becomes lower than 44 (30) rps, the speed is kept to 44 (30) rps.
  • Page 53 RPSmin < 40 40 < = RPSmin < 80 80 < = RPSmin < 90 53 ~ 47 57 ~ 51 59 ~ 53 90 < = RPSmin < 102 47 ~ 41 51 ~ 45 53 ~ 47 '14 • SR-T-157 102 <...
  • Page 54 '14 • SR-T-157 Compressor overheat protection Purpose: It is designed to prevent deterioration of oil, burnout of motor coil and other trouble resulting from the compressor overheat. (ii) Detail of operation Speeds are controlled with temperature detected by the sensor mounted on the discharge pipe. (Example) Fuzzy 4 rps After lapse of 3 min.
  • Page 55 '14 • SR-T-157 Outdoor fan motor protection If the outdoor fan motor has operated at 75 rpm or under for more than 30 seconds, the compressor and fan motor are stopped. Outdoor fan control at low outdoor temperature Cooling 1) Operating conditions: When the outdoor air temperature (TH2) is 22ºC or lower continues for 30 seconds while the compressor command speed is other than 0 rps.
  • Page 56 '14 • SR-T-157 Refrigeration cycle system protection Starting conditions When 5 minutes have elapsed after the compressor ON or the completion of the defrost control Other than the defrost control When, after meeting the conditions of 1) and 2) above, the compressor speed, indoor temperature (Thi) and indoor heat exchanger temperature (Th2) have met the conditions in the following table for 5 minutes: Indoor temperature (Th1)/ Operation mode...

  • Page 57: Remote Control (Option Parts)

    '14 • SR-T-157 9.5 Models FDTC25VF, 35VF (1) Remote control (option parts) The figure below shows the remote control with the cover opened. Note that all the items that may be displayed in the liquid crystal display area are shown in the figure for the sake of explanation Characters displayed with dots in the liquid crystal display area are abbreviated.

  • Page 58: Operation Control Function By The Wired Remote Control

    '14 • SR-T-157 (2) Operation control function by the wired remote control (a) Switching sequence of the operation mode switches of remote control (b) [CPU reset] This functions when “CHECK” and “GRILL” buttons on the remote control are pressed simultaneously. Operation is same as that of the power supply reset. (c) [Power failure compensation function]...Electric power supply failure • This becomes effective if “Power failure compensation effective” is selected with the setting of remote control function.

  • Page 59: Operation Control Function By The Indoor Control

    '14 • SR-T-157 (3) Operation control function by the indoor control (a) Auto operation 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 60 '14 • SR-T-157 (v) Timer operations which can be set in combination Item Sleep timer OFF timer ON timer Weekly timer Item Sleep timer � � � OFF timer � � � ON timer � � � Weekly timer � �...
  • Page 61 '14 • SR-T-157 (iii) Ending condition If one of following conditions is met during the hot start control, this control is terminated, and the fan is operated with the set airflow volume. Heat exchanger thermistor (ThI-R1 or R2, whichever higher) detects 35°C or higher. It has elapsed 7 minutes after starting the hot start control.
  • Page 62 '14 • SR-T-157 If the “Intermittence” is selected, following controls are performed: If the thermostat is turned OFF during the heating operation, the indoor unit moves to the hot control and turns OFF the indoor fan if the heat exchanger thermistors (both ThI-R1 and R2) detect 25°C or lower. b) Indoor fan OFF is fixed for 5 minutes. After the 5 minutes, the indoor fan is operated at ULo for 2 minutes. In the meantime the louver is controlled at level.
  • Page 63 '14 • SR-T-157 (ii) Automatic louver level setting during heating At the hot start with the heating thermostat OFF, regardless whether the auto swing switch is operated or not (auto swing or louver stop), the louver takes the level position (In order to prevent the cold start). The louver position display LCD continues to show the display which has been shown before entering this control.
  • Page 64 '14 • SR-T-157 (ii) Indoor unit performs the control A or B depending on each operating condition. Indoor unit operation mode Stop COOL HEAT Note (1) Including the stop from the cooling, dehumidifying, fan and heating, and the anomalous stop Compressor ON Control A (2) Including the “FAN”...
  • Page 65 '14 • SR-T-157 (p) Heating overload protection If the indoor heat exchanger temperature (detected with ThI-R) at 63°C or higher is detected for 2 seconds continuously, the compressor stops. When the compressor is restarted after a 3-minute delay, if a temperature at 63°C or higher is detected for 2 seconds continuously within 60 minutes after initial detection and if this is detected 5 times consecutively, the compressor stops with the anomalous stop (E8).
  • Page 66 '14 • SR-T-157 (s) High ceiling control In the case of indoor unit installed in a higher ceiling room, the airflow volume mode control can be changed with the wired remote control indoor unit function “FAN SPEED SET”. Indoor unit airflow setting Fan tap STANDARD PHi - Hi - Me - Lo Hi - Me - Lo Hi - Lo Hi - Me FAN SPEED SET HIGH SPEED1, 2 PHi - PHi - Hi - Me PHi - Hi - Me...
  • Page 67 '14 • SR-T-157 (v) External input/output control (CnT) Be sure to connect the wired remote control to the indoor unit. Without wired remote control remote operation by CnT is not possible to perform. Option ① Operation output (CnT-2: XR1) ② Heating output (CnT-3: XR2) ③...
  • Page 68 '14 • SR-T-157 (iii) Remote operation 1) In case of multiple units (Max. 16 indoor units group) are connected to one wired remote control When the indoor function setting of wired remote control for “External control set” is changed from “Individual (Factory default)” to “ For all units”, all units connected in one wired remote control system can be controlled by external operation input.
  • Page 69 '14 • SR-T-157 (x) Room temperature detection temperature compensation during heating With the standard specification, the compressor is turned ON/OFF with the thermostat setting temperature. When the thermostat is likely to turn OFF earlier because the unit is installed at the ceiling where warm air tends to accumulate, the setting can be changed with the wired remote control indoor unit function “ ”.

  • Page 70: Operation Control Function By The Outdoor Control

    '14 • SR-T-157 (4) Operation control function by the outdoor control (a) Defrosting operation Starting conditions (Defrosting operation can be started only when all of the following conditions are met.) After start of heating operation When it elapsed 45 minutes. (Accumulated compressor operation time) After end of defrosting operation When it elapsed 45 minutes.
  • Page 71 '14 • SR-T-157 (b) Cooling overload protective control Operating conditions: When the outdoor air temperature (TH2) has become continuously for 30 seconds at 41ºC or more, or 47ºC or more with the compressor running, the lower limit speed of compressor is brought up. Model FDTC25, 35VF Item 41°C or more...
  • Page 72 '14 • SR-T-157 (iii) Reset conditions: When either of the following condition is satisfied 1) The outdoor air temperature (TH2) is D ˚C or higher. 2) The compressor command speed is 0 rps. (e) Heating high pressure control (i) Purpose: Prevents anomalous high pressure operation during heating. (ii) Detector: Indoor heat exchanger sensor (THI-R) (iii) Detail of operation: (Example) Fuzzy 4rps 8rps After lapse of 20 sec.
  • Page 73 '14 • SR-T-157 (g) Heating low outdoor temperature protective control (i) Operating conditions:　When the outdoor air temperature (TH2) is lower than - 10ºC or higher continues for 30 sec- onds while the compressor command speed is other than 0 rps. The lower limit compressor command speed is change as shown in the figure below. (ii) Detail of operation: Lower limit 45 rps Normal operation Outdoor air temperature (°C) When either of the following condition is satisfied.
  • Page 74 '14 • SR-T-157 (k) Outdoor unit failure This is a function for determining when there is trouble with the outdoor unit during air conditioning. T he compressor is stopped if any one of the following in item (i), (ii) is satisfied. Once the unit is stopped by this function, it is not restarted. When the input current is measured at 1 A or less for 3 continuous minutes or more. (ii) If the outdoor unit sends a 0 rps signal to the indoor unit 3 times or more within 20 minutes of the power being turned on.
  • Page 75 '14 • SR-T-157 (o) 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 When, after meeting the conditions of 1) and 2) above, the compressor speed, indoor air temperature (Th1) and in- door heat exchanger temperature (Th2) have met the conditions in the following table for 5 minutes: Indoor air temperature (Th1)/ Operation mode...

  • Page 76: Maintenance Data

    '09•SRK-DB-087D '14 • SR-T-157 '09•SRK-DB-087D 10. MAINTENANCE DATA 10.1 SRR series (1) Cautions (a) If you are disassembling and checking an air conditioner, be sure to turn off the power before beinning. When (1) Cautions working on indoor units, let the unit sit for about 1 minute after turning off the power before you begin work. When working on an outdoor unit, there may be an electrical charge applied to the main circuit (electrolytic condenser), so begin work only after discharging this electrical charge (to DC 10 V or lower) (b) When taking out printed circuit boards, be sure to do so without exerting force on the circuit boards or package...

  • Page 77: Troubleshooting Procedure (If The Air Conditioner Runs)

    '09•SRK-DB-087D '14 • SR-T-157 (4) Troubleshooting procedure (If the air conditioner runs) 78 ~ 84. 78 ~ 84.

  • Page 78: Self-Diagnosis Table

    '14 • SR-T-157 (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 79: Service Mode (Trouble Mode Access Function)

    '09•SRK-DB-087D '14 • SR-T-157 (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 80 '09•SRK-DB-087D '14 • SR-T-157 (i) Self-diagnosis data Remote control setting Contents of output data Indicates the number of Remote control setting occasions previous to the present Temperature setting the error display data are from. 1 time previous (previous time) 21ºC 22ºC 2 times previous 23ºC...
  • Page 81 '09•SRK-DB-087D '14 • SR-T-157 (Example) Remote control setting Operation Displayed data Fan speed Temperature switching switching 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 82 '09•SRK-DB-087D '14 • SR-T-157 (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 Error coad light (10's digit) (1's digit) Normal Can not receive signals for 35 Power supply is faulty.
  • Page 83 '09•SRK-DB-087D '14 • SR-T-157 (d) Remote control information tables Display pattern when Display pattern when Fan speed in service mode in service mode Operation switching switching when when there is an there is an RUN light TIMER light abnormal stop abnormal stop (Operation switching) (Fan speed switching)
  • Page 84 '09•SRK-DB-087D '14 • SR-T-157 (e) Room temperature sensor, indoor heat exchanger sensor, outdoor air temperature sensor, outdoor heat exchanger sensor table Units: °C TIMER light (1’s digit) RUN light (10’s digit) Buzzer sound (sounds for 0.1 second) (does not sound) Sensor value displayed when the error code is normal Sensor name -64ºC...
  • Page 85 '09•SRK-DB-087D '14 • SR-T-157 Discharge pipe sensor table Units: °C TIMER light (1’s digit) RUN light (10’s digit) Buzzer sound (sounds for 0.1 second) (does not sound) Sensor value displayed when the error code is normal -64ºC 0.1 sec. If the temperature is < 0, the buzzer sounds. If the temperature is≧0, the buzzer does not sound.
  • Page 86 '09•SRK-DB-087D '14 • SR-T-157 Service data record form...

  • Page 87: Inspection Procedures Corresponding To Detail Of Trouble

    '09•SRK-DB-087D '14 • SR-T-157 (7) Inspection procedures corresponding to detail of trouble Sensor error Broken sensor wire, connector poor connection Sensor temperature characteristics (Room Discharge pipe sensor temperature characteristics temp., indoor heat exchanger temp., out- door heat exchanger temp., outdoor air temp.) - 10 Temperature (˚C)
  • Page 88 '09•SRK-DB-087D '14 • SR-T-157 Current cut Compressor lock, Compressor wiring short circuit, Compressor output is open phase, Outdoor PCB is faulty, Service valve is closed, EEV is faulty, Compressor faulty. ＊   ＊ SRC25, 35 : 1.703Ω (U-V, V-W, U-W) or more at 20ºC Current safe stop Overload operation, compressor lock, overcharge...
  • Page 89 '09•SRK-DB-087D '14 • SR-T-157 Over heat of compressor Gas shortage, defective discharge pipe sensor 86.) Error of signal transmission Wiring error including power cable, defective indoor/ outdoor PCB ② ③ ② ③ ① ②...
  • Page 90 '09•SRK-DB-087D '14 • SR-T-157 Trouble of outdoor unit Insufficient refregerant amount, Faulty power transistor, Broken compressor wire Service valve close, Defective EEV, Defective outdoor PCB ◆       Notes (1) wire Check coil wire resistance, See page 87. ． Outdoor fan motor error Defective fan motor, connector poor connection, defective outdoor PCB...

  • Page 91: Phenomenon Observed After Shortcircuit, Wire Breakage On Sensor

    '14 • SR-T-157 Rotor lock Defective compressor, defective outdoor PCB See page 87. Drain abnormality (SRR series only) [Drain piping defective,pump defect, float switch, indoor PCB] Rotor lock Defective compressor, defective (8) Phenomenon observed after shortcircuit, wire breakage on sensor outdoor PCB Indoor PCB is Has an overflow developed?

  • Page 92: Checking The Indoor Electrical Equipment

    '09•SRK-DB-087D '14 • SR-T-157 (b) Outdoor unit Phenomenon Operation Sensor mode Shortcircuit Disconnected wire Cooling Heat exchanger sensor Defrosting is performed for 10 minutes at approx. 45 minutes. Heating Cooling Ourdoor air temperature sensor Defrosting is performed for 10 minutes at approx. 45 minutes. Heating Discharge pipe All modes...

  • Page 93: How To Make Sure Of Wireless Remote Control

    '09•SRK-DB-087D '14 • SR-T-157 (C) Power transistor inspection procedure [Use a tester with a needle indicator for the inspection. (Do not use a digital tester. Check in the AC 300 volt range.)] (1) If there is a self-diagnosis display, inspect the compressor system (burns, wiring mistakes, etc.) If no problems are found, check the output of the power transistor (2) Output inspection procedure Disconnect the terminals for the compresseor.

  • Page 94: Outdoor Unit Inspection Points

    '09•SRK-DB-087D '14 • SR-T-157 (11) Outdoor unit inspection points 25ZMX-S, 35ZMX-S ◆Check point of outdoor unit CAUTION- HIGH VOLTAGE High voltage is produced in the control box. Don't touch ◆Power source and serial signal inspection electrical parts in the control box for 5 minutes after the : AC 220/230/240V unit is stopped.
  • Page 95 '09•SRK-DB-087D '14 • SR-T-157 (a) Inspection of electronic expansion valve         • Inspection of electronic expansion valve as a separate unit Measuring point Resistance when normal (b) Outdoor unit fan motor check procedure   (i) Outdoor PCB output check   ...

  • Page 96: Fdtc Series

    '14 • SR-T-157 10.2 FDTC series 10.2.1 Diagnosing of microcomputer circuit (1) Selfdiagnosis function (a) Check indicator table Whether a failure exists or not on the indoor 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 97 '14 • SR-T-157 (ii) Outdoor unit Remote control Indoor 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 98 '14 • SR-T-157 (iii) 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 Error code on remote •...

  • Page 99: Troubleshooting Procedure

    '14 • SR-T-157 ■ 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 control PCB •...
  • Page 100 '14 • SR-T-157 • Control PCB PSB012D976B Replace and set up the PCB according to this instruction. ① Set to an appropriate address and function using switch on PCB. 　 Select the same setting with the removed PCB. item switch Content of control Address Plural indoor units control by 1 remote control...
  • Page 101 '14 • SR-T-157 • Power PCB PSB012D953A This PCB is a general PCB. Replace the PCB according to this instruction. ① Replace the PCB (refer to below dwg.) 1. Unscrew terminal of the wiring(yellow/green) soldered to PCB from the box. 2.
  • Page 102 '14 • SR-T-157 ●DIP switch setting list Switches Description Default setting Remarks Address No. setting at plural indoor units control by 1 R/C SW6-1 SW6-2 Model selection As per model See table 1 SW6-3 SW6-4 Normal * /Test run SW7-1 Test run, Drain motor Normal Reserved...

  • Page 103: Check Of Anomalous Operation Data With The Remote Control

    '14 • SR-T-157 Check of anomalous operation data with the remote Number Data Item control (Operation Mode) Operation data can be checked with remote control unit operation. (Set Temperature) ➀ Press the button. (Return Air Temperature) The display change “ ”...

  • Page 104: Inverter Checker For Diagnosis Of Inverter Output

    '14 • SR-T-157 Inverter checker for diagnosis of inverter output 　 ●Checking method (a) Setup procedure of checker. Power OFF (Turn off the breaker). Remove the terminal cover of compressor and disconnect the wires (U, V, W) from compressor. 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 105: Outdoor Unit Inspection Points

    '14 • SR-T-157 (6) Outdoor unit inspection points Models 25ZMX-S, 35ZMX-S ◆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 : AC 220/230/240V unit is stopped.

  • Page 106: Troubleshooting Flow

    '14 • SR-T-157 10.2.2 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 107: Operates But Does Not Cool

    '14 • SR-T-157 Troubleshooting Green Error code Content None Remote control: Operates but does not cool Indoor Keeps flashing Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Check the indoor unit fan operation. Check the temperature differnce between return and supply air.

  • Page 108: Operates But Does Not Heat

    '14 • SR-T-157 Green Error code Content None Operates but does not heat Remote control: Keeps flashing Stays OFF Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Check the indoor unit fan operation. Check the temperature differnce between return and supply air. It is normal.

  • Page 109: Earth Leakage Breaker Activated

    '14 • SR-T-157 Green Error code Content None Earth leakage breaker activated Remote control: Stays OFF Stays OFF Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Are OK the insulation resistance and Replace compressor. coil resistance of compressor? 2.

  • Page 110: Excessive Noise/Vibration

    '14 • SR-T-157 Green Error code Content None Excessive noise/vibration (1/3) Remote control: – – 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 considered that the air- after stopping operation...

  • Page 111: Excessive Noise/Vibration

    '14 • SR-T-157 Green Content Error code None Excessive noise/vibration (2/3) Remote control: – – 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 112: Excessive Noise/Vibration

    '14 • SR-T-157 Green Content Error code None Excessive noise/vibration (3/3) Remote control: – – 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 113: Louver Motor Failure

    '14 • SR-T-157 Green Content Error code Louver motor failure None Remote control: 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 114: Power Supply System Error (Power Supply To Indoor Control Pcb)

    '14 • SR-T-157 Green Error code Content Power supply system error Remote control: None (Power supply to indoor control PCB) Indoor Stays OFF Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure AC220/230/240V detected between � and � on the terminal block of indoor unit? AC220/230/240V...
  • Page 115 '14 • SR-T-157 Green Content Error code Power supply system error None Remote control: (Power supply to remote control) Keeps flashing Stays OFF Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Isn't there any Correct. loose connection of remote control wires? 2.

  • Page 116: Inspect I/U (When 1 Or 2 Remote Controls Are Connected)

    '14 • SR-T-157 Green Content Error code INSPECT I/U INSPECT I/U Remote control: 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 117: Inspect I/U (Connection Of 3 Units Or More Remote Controls)

    '14 • SR-T-157 Green Content Error code INSPECT I/U INSPECT I/U Remote control: Keeps flashing Stays OFF Indoor (Connection of 3 units or more remote control) 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 118 '14 • SR-T-157 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.
  • Page 119 '14 • SR-T-157 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 outdoor PCB before replacing the power From previous page supply fuse...
  • Page 120 '14 • SR-T-157 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 121 '14 • SR-T-157 Green Content Error code Remote control Remote control: Keeps flashing Stays OFF Indoor communication circuit error 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Malfunction by noise Is it possible to Check peripheral reset normally by the environment.

  • Page 122: Communication Error During Operation

    '14 • SR-T-157 Green Content Error code Communication error during operation Remote control: Keeps flashing 2 - time flash Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Note (1) Inspect faulty connections (disconnection, looseness) on the outdoor unit terminal block. Is the connection of signal Repair signal wires.

  • Page 123: E6 Indoor Heat Exchanger Temperature Thermistor Anomaly

    '14 • SR-T-157 Green Content Error code Indoor heat exchanger Remote control: temperature thermistor anomaly Keeps flashing 1 - time flash Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the connection of indoor heat Correct. ➞ Insert connector exchanger temperature thermistor securely.

  • Page 124: E7 Return Air Temperature Thermistor Anomaly

    '14 • SR-T-157 Green Content Error code Return air temperature Remote control: thermistor anomaly Keeps flashing 1 - time flash Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the connection of return Correct. ➞ Connect air temperature thermistor connector.
  • Page 125 '14 • SR-T-157 Green Content Error code Heating overload operation Remote control: 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 Defective indoor heat indoor heat exchanger exchanger temperature...
  • Page 126 '14 • SR-T-157 Green Content Error code Drain trouble Remote control: Keeps flashing 1 - time flash Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Check the error data in cvthe remote control. Is there any overflow? 2. Error detection method Float switch is activated Is the Defective indoor control...

  • Page 127: E10 Excessive Number Of Connected Indoor Units (More Than 17 Units) By Controlling With One Remote Control

    '14 • SR-T-157 Excessive number of connected Green Content Error code indoor units (more than 17 units) Remote control: Keeps flashing Stays OFF Indoor by controlling with one remoto control 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Aren't more than 17 Defective remote control indoor units connected to one ➞...

  • Page 128: E16 Indoor Fan Motor Anomaly

    '14 • SR-T-157 Green Content Error code 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? 2.

  • Page 129: E19 Indoor Unit Operation Check, Drain Motor Check Setting Error

    '14 • SR-T-157 Green Content Error code Indoor unit operation check, Remote control: drain 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 Defective indoor control Is SW7-1 PCB (Defective SW7)

  • Page 130: Indoor Fan Motor Rotation Speed Anomaly

    '14 • SR-T-157 Green Content Error code Remote control: Indoor fan motor rotation 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? 2.

  • Page 131: E28 Remote Control Temperature Thermistor Anomaly

    '14 • SR-T-157 Green Content Error code Remote control Remote control: temperature thermistor anomaly Keeps flashing Stays OFF Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure 2. Error detection method Is the remote Correct. control temperature thermistor Is the remote connected properly? controller temperature thermistor Detection of anomalously low...
  • Page 132 '14 • SR-T-157 Green Error code Content Remote control: Cooling overload operation Indoor Keeps flashing Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure * For the characteristics of outdoor heat exchanger temperature Are normal sensor, refer to E37. the characteristics of Replace outdoor heat outdoor heat exchanger...

  • Page 133: E36 Discharge Pipe Temperature Error

    '14 • SR-T-157 Green Content Error code 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, refer to E39. characteristics of Replace discharge pipe discharge pipe temperature...

  • Page 134: E37 Outdoor Heat Exchanger Temperature Sensor Anomaly

    '14 • SR-T-157 Green Content Error code 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 135 '14 • SR-T-157 Green Content Error code 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 136: Discharge Pipe

    '14 • SR-T-157 Green Content Error code Discharge pipe Remote control: temperature sensor anomaly Keeps flashing Stays OFF Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure 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 137 '14 • SR-T-157 Green Content Error code Current cut (1/2) Remote control: Indoor Keeps flashing Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the Power supply Check power supply. voltage OK? 2. Error detection method Are the Open the valves.
  • Page 138 '14 • SR-T-157 Green Error code Content Current cut (2/2) Remote control: Indoor Keeps flashing Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure From previous page Is the checked result of power • Defective outdoor transistor module PCB ➞...

  • Page 139: Active Filter Voltage Error

    '14 • SR-T-157 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 supply normal? 2. Error detection method Is voltage Restore normal condition.

  • Page 140: E48 Outdoor Fan Motor Anomaly

    '14 • SR-T-157 Green Error code Content Remote control: Outdoor fan motor anomaly 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? 2.
  • Page 141 '14 • SR-T-157 Green Green Error code Error code Content Content Power transistor anomaly Remote controller: E51 Remote control: Power transistor error Keeps flashing Stays Off Indoor Indoor Keeps flashing Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Check soldered surfaces on the outdoor control PCB for...
  • Page 142 '14 • SR-T-157 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 143 '14 • SR-T-157 Green Green Error code Error code Content Content Current safe stop Keeps flashing Stays Off Indoor Current safe stop Remote controller: E58 Remote control: Indoor Keeps flashing Stays OFF (Model SRC40 - 60) 3 time flash Outdoor ―...
  • Page 144 '14 • SR-T-157 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 Does Replace outdoor fan motor...
  • Page 145 '14 • SR-T-157 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 supply voltage power supply voltage Reset the power supply and restart operation. 2.

  • Page 146: Option Parts

    '14 • SR-T-157 11. OPTION PARTS Installation manual for wired remote controller PJA012D730 Connect the remote control cord terminal block. (1) Wired remote control (RC-E5) Connect the terminal of remote c Read together with indoor unit's installation manual. with the terminal of indoor unit (X (X and Y are no polarity) WARNING Wiring route is as shown in the r...
  • Page 147 '14 • SR-T-157 mote controller Connect the remote control cord to the Sheath Sheath The range of temperature setting Upper Upper terminal block. When shipped, the range of set tempera Connect the terminal of remote control (X,Y) Upper case Upper case Board Board Heating : 16 ~ 30°C (55 ~ 86°F)
  • Page 148 '14 • SR-T-157 PJA01 2D7 30 Sheath Sheath The range of temperature setting Upper When shipped, the range of set temperature differs depending on the operation mode as below. Upper case 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 149 '14 • SR-T-157 The functional setting The initial function setting for typical using is performed automatically by the indoor unit connected, when remote control and indoor unit are connected. As long as they are used in a typical manner, there wiil be no need to change the initial settings. If you would like to change the initial setting marked “...
  • Page 150 '14 • SR-T-157 Note 1: The initial setting marked “ ” is decided by connected indoor and outdoor unit, and is automatically defined as following table. Function No. Item Default Model "Auto-RUN" mode selectable indoor unit. Remote control function02 Indoor unit without "Auto-RUN" mode Indoor unit with two or three step of air flow setting Remote control function06...
  • Page 151 '14 • SR-T-157 PJA0 12 D73 0 PJA 01 2D7 30 utomatically defined as following table. is automatically defined as following table. Operation message Operation message How to set function How to set function able indoor unit. indoor unit. Function description: Function description: Function No.

  • Page 152: Wireles Kit (Fdtc Series : Rcn-Tc-24W-Er)

    '14 • SR-T-157 (2) Wireles kit (FDTC series ： RCN-TC-24W-ER) PJA012D758 PJA012D758 PJA012D758 PJA012D758 Notes : WIRELESS KIT INSTALLATION MANUAL WIRELESS KIT INSTALLATION MANUAL WIRELESS KIT INSTALLATION MANUAL Following functions of FDTC Type-F indoor unit series are not able to be set with this wireess remote control (RCN-TC-24W-ER). 1.
  • Page 153 '14 • SR-T-157 PJA012D758 PJA012D758 PJA012D758 PJA012D758 PJA012D758 PJA012D758 PJA012D758 PJA012D758 PJA012D758 PJA012D758 PJA012D758 PJA012D758 PJA012D758 PJA012D758 Remote controller Remote controller Remote controller Remote controller Remote controller Remote controller Remote controller Remote controller Remote controller Remote controller Remote controller Remote controller Remote controller Remote controller Wireless remote controller’s operable area...

  • Page 154: Simple Wired Remote Control (Fdtc Series : Rch-E3)

    '14 • SR-T-157 (3) Simple wired remote control (FDTC series ： RCH-E3) Notes : Following functions of FDTC Type-F indoor unit series are not able to be set with this simple wired remote control (RCH-E3). 1. Individual flap control system 2.

  • Page 155: Wiring Specifications

    '14 • SR-T-157 MITSUBISHI HEAVY INDUSTRIES,LTD. AIR-CONDITIONING & REFRIGERATION SYSTEMS HEADQUARTERS In case of embedding wiring Remote control installation dimensions 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 156 '14 • SR-T-157 In case of exposing cord In case of exposing cord In case of exposing cord In case of exposing cord In case of exposing cord In case of exposing cord In case of exposing cord In case of exposing cord In case of exposing cord In case of exposing cord In case of exposing cord...
  • Page 157 '14 • SR-T-157 3. Master/ slave setting when more than one remote controller are used 3. Master/ slave setting when more than one remote controller are used 3. Master/ slave setting when more than one remote controller are used 3. Master/ slave setting when more than one remote controller are used 3.

  • Page 158: Sr-T-

    connecting section. Be careful about contact failure. connecting section. Be careful about contact failure. connecting section. Be careful about contact failure. connecting section. Be careful about contact failure. connecting section. Be careful about contact failure. connecting section. Be careful about contact failure. connecting section.
  • Page 159 ailure. failure. “88” blinks on the temperature setting indicator. (blinking for approximately 2 to 10 seconds while “88” blinks on the temperature setting indicator. (blinking for approximately 2 to 10 seconds while × 2 cores 2 cores data is read) Then, the return air temperature is displayed. When AIR CON NO. is pressed, return data is read) Then, the return air temperature is displayed.

  • Page 160: Interface Kit (Sc-Bikn-E)

    '14 • SR-T-157 (4) Interface kit (SC-BIKN-E) RKZ012A088B 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 161 '14 • SR-T-157 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 162 '14 • SR-T-157 Functions of CNT connector It is available to operate the air conditioning unit 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. 0.75mm Note (1) 0.3mm ×2m...
  • Page 163 '14 • SR-T-157 Connection of wired remote control Regarding the connection of wired remote control, refer to the instruction 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 164: Super Link E Board (Sc-Adna-E)

    '14 • SR-T-157 (5) Super link E board (SC-ADNA-E) (5) Super link E board (SC-ADNA-E) SL2NA-E, and SL3N-AE/BE to control...
  • Page 165 '14 • SR-T-157...

  • Page 166: Ceiling Concealed Type (Srr) Option Parts

    '14 • SR-T-157 (6) Ducted type (SRR) option parts (6) Ceiling concealed type (SRR) option parts ■ Table of option parts (a) Bottom air inlet grille set (b) Rear inlet filter set (c) Duct joint for air outlet plate (d) Drain up kit RTS12 RBF12 RFJ22...
  • Page 167 '14 • SR-T-157 (b) Rear inlet filter set Pan-head screw ( i ) Part No. : RBF12 Indoor unit Filter set Do not use this filter set alone. Bracket for filter fixing Hanger metal (ii) Installation method 1) Detach the rear panel and the hanger metal screwed onto the rear panel from an indoor unit.
  • Page 168 '14 • SR-T-157 (d) Drain up kit ( i ) Part No. : RDU12E 3) Connect the drain up kit's connectors for the drain Use this drain up kit when the grade of the drain pump (red 2P) and the float switch (black 2P) to the pipe is not enough.
  • Page 169 '14 • SR-T-157 ◆ Air flow and external static pressure characteristics Heating <Hi> Heating <Hi> SRR25ZJ-S SRR35ZJ-S Cooling <Hi> Cooling <Hi> Standard airflow Standard airflow Minimum airflow Minimum airflow Air flow (m /min) Air flow (m /min) ◆ Air inlet grille air flow and friction loss characteristics (Part No.:RTS12)
  • Page 170 Rated air flow(outdoor) 1770 m3/h 　　　　　　Name and address of the manufacturer or of its authorised representative. Contact details for obtaining more information MITSUBISHI HEAVY INDUSTRIES EUROPE, LTD. AIR-CONDITIONING DIVISION 4th Floor International Buildings 71 Kingsway, London, WC2B 6ST United Kingdom RWA000Z231...
  • Page 171 Rated air flow(outdoor) 1950 m3/h 　　　　　　Name and address of the manufacturer or of its authorised representative. Contact details for obtaining more information MITSUBISHI HEAVY INDUSTRIES EUROPE, LTD. AIR-CONDITIONING DIVISION 4th Floor International Buildings 71 Kingsway, London, WC2B 6ST United Kingdom RWA000Z231...
  • Page 172 Rated air flow(outdoor) 1770 m3/h 　　　　　　Name and address of the manufacturer or of its authorised representative. Contact details for obtaining more information MITSUBISHI HEAVY INDUSTRIES EUROPE, LTD. AIR-CONDITIONING DIVISION 4th Floor International Buildings 71 Kingsway, London, WC2B 6ST United Kingdom RWA000Z234...
  • Page 173 Rated air flow(outdoor) 1950 m3/h 　　　　　　Name and address of the manufacturer or of its authorised representative. Contact details for obtaining more information MITSUBISHI HEAVY INDUSTRIES EUROPE, LTD. AIR-CONDITIONING DIVISION 4th Floor International Buildings 71 Kingsway, London, WC2B 6ST United Kingdom RWA000Z234...
  • Page 174 INVERTER RESIDENTIAL AIR-CONDITIONERS Air-Conditioning & Refrigeration Systems 16-5, Konan 2-chome, Minato-ku, Tokyo, 108-8215 Japan http://www.mhi.co.jp Because of our policy of continuous improvement, we reserve the right to make changes in all specifications without notice. Copyright MITSUBISHI HEAVY INDUSTRIES, LTD.

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