Mitsubishi Heavy Industries FDTC25VF Technical Manual
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Mitsubishi Heavy Industries FDTC25VF Technical Manual

Inverter residential air conditioners (split system, air to air heat pump type)
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TECHNICAL MANUAL
INVERTER RESIDENTIAL AIR CONDITIONERS
(Split system, air to air heat pump type)
Ceiling cassette-4way compact type

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Summary of Contents for Mitsubishi Heavy Industries FDTC25VF

  • Page 1 TECHNICAL MANUAL INVERTER RESIDENTIAL AIR CONDITIONERS (Split system, air to air heat pump type) Ceiling cassette-4way compact type...

  • Page 2: Table Of Contents

    '12 • SRK-T-126 CONTENTS 1. SPECIFICATIONS ....................................2. EXTERIOR DIMENSIONS ................. (1) Indoor units ..................(2) Outdoor units ..................(3) Wired remote controller ................3. ELECTRICAL WIRING ................(1) Indoor units ..................(2) Outdoor units ..................4. NOISE LEVEL ....................

  • Page 3: Srk-T

    '12 • SRK-T-126 10.2 Troubleshooting flow ................56 ..................56 ..................57 11. OPTION PARTS ..................95 11.1 Instullation of wired remote controller (RC-E5) ....... 95 11.2 Wireles kit (RCN-TC-24W-ER) ............101 11.3 Simple wired remote controoller (RCH-E3) ........105 ■How to read the model name Example: ・Indoor unit FDTC 25 VF...

  • Page 4: Exterior Dimensions

    '12 • SRK-T-126 1. SPECIFICATIONS Adapted to RoHS directive FDTC25VF Model Indoor unit FDTC25VF Outdoor unit SRC25ZJX-S Item Panel TC-PSA-25W-E Power source 220/230/240V~50Hz Operation data Cooling Heating Nominal capacity 2.55 [ 0.9 (Min.)~3.2 (Max.)] 3.45 [ 0.9 (Min.)~4.7 (Max.)] Power consumption 0.84...

  • Page 5: Outdoor Units

    '12 • SRK-T-126 Adapted to RoHS directive FDTC35VF Model Indoor unit FDTC35VF Outdoor unit SRC35ZJX-S Item Panel TC-PSA-25W-E Power source 220/230/240V~50Hz Operation data Cooling Heating Nominal capacity 3.6 [ 0.9 (Min.)~4.1 (Max.)] 4.25 [ 0.9 (Min.)~5.1 (Max.)] Power consumption 1.07 1.16 Running current 4.9/4.7/4.5...
  • Page 6 Symbol Content Decorative panel 530                25,35 :  9.52 （3／8"） （ Flare） （ Suspension bolts pitch ） Gas piping Model 40-60 :  12.7 （1／2"） （ Flare） Liquid piping 6.35 （ 1／4"） （ Flare） Drain piping VP20 （ I.D.20,O.D.26）   Note （ 2） Hole for wiring Suspension bolts （M10 or M8） Air outlet opening （Knock out） for ducting Space for installation and service Control Air return...
  • Page 7 Notes （1） It must not be surrounded by walls on the four sides. Symbol Content （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 the 15mm. Service valve connection（liquid side） φ6.35（1／4"）（Flare）...

  • Page 8: Wired Remote Controller

    '12 • SRK-T-126 (3) Wired remote controller (option parts) Model : RC-E5 PJZ000Z295...

  • Page 9: Indoor Units

    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 controller communication Thermistor （Remote controller）...

  • Page 10: Outdoor Units

    TO INDOOR UNIT POWER WIRES SIGNAL WIRE PWB ASSY POWER T1 T2 POWER SOURCE TRANSISTOR ～220ｰ240V 50Hz／～220V 60Hz t゜ 250V 15A R.IN （BK） （RD） 250V 20A NOISE （WH） FILTER 3～ （BK） S.IN （WH） F3 250V 1A （Y／G） （RD） CIRCUIT （Y／G） CNFAN 250V 10A TERMINAL...

  • Page 11: Noise Level

    '12 • SRK-T-126 4. NOISE LEVEL Model FDTC25VF Condition ISO-T1,JIS C9612 (Indoor Unit) Model FDTC25VF Noise Cooling 38 dB(A) Level Heating 39 dB(A) × ..Cooling, Heating 1000 2000 4000 8000 Mid Octave Band frequency (Hz) (Outdoor Unit) Model SRC25ZJX-S...
  • Page 12 '12 • SRK-T-126 Model FDTC35VF Condition ISO-T1,JIS C9612 (Indoor Unit) Model FDTC35VF Noise Cooling 41 dB(A) Level Heating 43 dB(A) × ..Cooling, Heating 1000 2000 4000 8000 Mid Octave Band frequency (Hz) (Outdoor Unit) Model SRC35ZJX-S Noise Cooling 50 dB(A) Level Heating 50 dB(A)

  • Page 13: Piping System

    '12 • SRK-T-126 5. PIPING SYSTEM Models 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 pipie Check joint Heat Muffler (TH3) (φ9.52) Room temp.

  • Page 14: Range Of Usage & Limitations

    '12 • SRK-T-126 6. RANGE OF USAGE & LIMITATIONS Models FDTC25, 35VF Item Indoor return air temperature Cooling operation : Approximately 18 to 32℃ D.B. (Upper, lower limits) Heating operation : Approximately 10 to 27℃ D.B. Outdoor air temperature Cooling operation : Approximately -15 to 46℃ D.B. (Upper, lower limits) Heating operation : Approximately -15 to 21℃...
  • Page 15 '09•SRK-DB-087D '12 • SRK-T-126 (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 16: Capacity Tables

    '12 • SRK-T-126 7. CAPACITY TABLES Model FDTC25VF Cool Mode Heat Mode 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 19˚CWB 20˚CWB 22˚CWB...

  • Page 17: Application Data

    '12 • SRK-T-126 8. APPLICATION DATA 8.1 Installation of indoor unit...
  • Page 18 '12 • SRK-T-126 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 19 '12 • SRK-T-126 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 20: Electrical Wiring

    '12 • SRK-T-126 ⑥ ⑧ Drain pipe (continued) Panel installation Drain test l After wiring work finished, install the panel on the indoor unit. (see next page) l Refer to attached panel installation manual for details. of drain l After installation of drain pipe, make sure that drain system work in good condition and no water leakage from joint and drain pan.
  • Page 21 '12 • SRK-T-126 PJA012D783 (See page 16)
  • Page 22 '12 • SRK-T-126 * 1 This function is not able to be set with wireless remote controls or simple remote control (RCH-H3). * 2 For setting the swing range of other louvers, return to 1 and proceed same procedure respectively.

  • Page 23: Installation Of Outdoor Unit

    RWC012A030A 8.2 Installation of outdoor unit 25 · 35 Models Models SRC25ZJX-S, 35ZJX-S R410A REFRIGERANT USED • This installation manual deals with outdoor units and general installation specifications only. For indoor units, refer to page 16 • 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 24 CAUTION • Use the circuit breaker with sufficient breaking capacity. • Take care when carrying the unit by hand. • When perform the air conditioner operation (cooling or drying If the breaker does not have sufficient breaking capacity, it can cause If the unit weights more than 20kg, it must be carried by two or more operation) in which ventilator is installed in the room.
  • Page 25 Notabilia as a unit designed for R410A ● Do not use any refrigerant other than R410A. R410A will rise to pressure about 1.6 times higher than that of a conventional refrigerant. A cylinder containing R410A has a pink indication mark on the top. ●...
  • Page 26 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 27 CAUTION Do not apply force beyond proper fastening torque in tightening the flare nut. Fix both liquid and gas operation valves at the valve main bodies as illustrated on the right, and then fasten them, applying appropriate fastening torque. Operation valve size (mm) Tightening torque (N·m) Tightening angle (°...
  • Page 28 3. DRAIN PIPING WORK ● Execute drain piping by using a drain elbow and drain grommets supplied separately as optional parts, where water drained from the outdoor unit is a problem. CAUTION ● When condensed water needs to be ● Water may drip where there is a larger amount of drain led to a drain, etc., install the unit on water.
  • Page 29 Power supply terminal block Power cable, indoor-outdoor connecting wires Cable clamp ● Always perform grounding system installation work with the power cord unplugged. Earth leakage breaker ○ It holds cables in place and protect the terminal (Harmonic resistant type) Always use an earth leakage circuit breaker designed for inverter circuits to CAUTION connection from external force.

  • Page 30: Outline Of Operation Control By Microcomputer

    '12 • SRK-T-126 9. OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER 9.1 Wired remote controller (option parts) The figure below shows the remote controller 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 31: Operation Control Function By The Wired Remote Controller

    '12 • SRK-T-126 9.2 Operation control function by the wired remote controller (a) Switching sequence of the operation mode switches of remote controller (b) [CPU reset] This functions when “CHECK” and “ESP” buttons on the remote controller 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 controller function. •...

  • Page 32: Operation Control Function By The Indoor Controller

    '12 • SRK-T-126 9.3 Operation control function by the indoor controller (a) Auto operation If “Auto” mode is selected by the remote controller, 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 33 '12 • SRK-T-126 (d) Timer operation Sleep timer Set the duration of time from the present to the time to turn off the air-conditioner. It can be selected from 10 steps in the range from “OFF 1 hour later” to “OFF 10 hours later”. After the sleep timer setting, the remaining time is displayed with progress of time in the unit of hour.
  • Page 34 '12 • SRK-T-126 (g) Hot keep Hot keep control is performed at the start of the defrost control. Control When the indoor heat exchanger temperature (detected with Th -R1 or R2) drops to 35°C or lower, the speed of indoor fan is changed to the lower tap at each setting. During the hot keep, the louver horizontal control signal is transmitted.
  • Page 35 '12 • SRK-T-126 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 36 '12 • SRK-T-126 (m) Operation check/drain pump test run operation mode If the power is turned on by the dip switch (SW7-1) on the indoor PCB when electric power source is supplied, it enters the mode of operation check/drain pump test run. It is ineffective (prohibited) to change the switch after turning power on. When the communication with the remote controller has been established within 60 seconds after turning power on by the dip switch (SW7-1) ON, it enters the operation check mode.
  • Page 37 '12 • SRK-T-126 (p) Anomalous fan motor After starting the fan motor, if the fan motor speed is 200rpm or less is detected for 30 seconds continuously and 4 times within 60 minutes, then fan motor stops with the anomalous stop (E16). (q) Plural unit control – Control of 16 units group by one remote controller Function One remote controller switch can control a group of multiple number of unit (Max.
  • Page 38 '12 • SRK-T-126 (t) Operation permission/prohibition (In case of adopting card key switches or commercially available timers) When the indoor function setting of wired remote controller for “Operation permission/prohibition” is changed from “Invalid (Factory default)” to “ Valid”, following control becomes effective. Optional Card key Blue switch Normal operation Operation permission/prohibition mode (Factory default) “Valid”...
  • Page 39 '12 • SRK-T-126 2) Remote operation input Remote operation input connector (CnT-6) is provided on the indoor control PCB. However remote operation by CnT-6 is not effective, when “Center mode” is selected by center controller. In case of plural unit (twin, triple, double twin), remote operation input to CnT-6 on the slave indoor unit is invalid. Only the “LEVEL INPUT” is acceptable for external input, however when the indoor function setting of “Level input (Factory default)”...
  • Page 40 '12 • SRK-T-126 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 directly connected remote controller remote controller CnT-6 to the remote to the remote system can be system can be controller can be...

  • Page 41: Operation Control Function By The Outdoor Controller

    '12 • SRK-T-126 9.4 Operation control function by the outdoor controller (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 42 '12 • SRK-T-126 (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 More than 41 at less than 47...
  • Page 43 '12 • SRK-T-126 3) Reset conditions: When either of the following condition is satisfied a) The outdoor air temperature (TH2) is D ˚C or higher. b) The compressor command speed is 0 rps. (e) Heating high pressure control 1) Purpose: Prevents anomalous high pressure operation during heating. 2) Detector: Indoor heat exchanger sensor (THI-R) 3) Detail of operation: (Example) Fuzzy 4rps 8rps After lapse of 20 sec.
  • Page 44 '12 • SRK-T-126 (g) Heating low outdoor temperature protective control 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. Detail of operation: Lower limit 45 rps Normal operation Outdoor air temperature (°C) When either of the following condition is satisfied.
  • Page 45 '12 • SRK-T-126 (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 1), 2) 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. 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 46 '12 • SRK-T-126 (o) Refrigeration cycle system protection 1) 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 a) and b) 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 47: Maintenance Data

    '12 • SRK-T-126 10. MAINTENANCE DATA 10.1 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 controller error code, indoor unit green LED (power pilot lamp and microcomputer normality pilot lamp) or red LED (check pilot lamp). (i) Indoor unit Remote controller Indoor control PCB...
  • Page 48 '12 • SRK-T-126 (ii) Outdoor unit Remote controller 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 • Defective outdoor heat exchanger temperature sensor of temperature Stays OFF temperature sensor flashing...
  • Page 49 '12 • SRK-T-126 (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 • Displays the error of higher priority (When plural errors are persisting) controller Red LED on indoor • Displays the present errors. (When a new error has occurred after the former error was reset.) control PCB ■...

  • Page 50: Troubleshooting Procedure

    '12 • SRK-T-126 ■ Error log and reset Error indicator Memorized error log Reset • Stop the unit by pressing the ON/OFF Remote controller display • Higher priority error is memorized. switch of remote controller. • If the unit has recovered from anomaly, it Red LED on indoor control PCB •...
  • Page 51 '12 • SRK-T-126 • Control PCB PSB012D931F 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 controller...
  • Page 52 '12 • SRK-T-126 • 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 53 '12 • SRK-T-126 ●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 54: Check Of Anomalous Operation Data With The Remote Controller

    '12 • SRK-T-126 (4) Check of anomalous operation data with the remote Number Data Item controller (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 55: Inverter Checker For Diagnosis Of Inverter Output

    '12 • SRK-T-126 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 56 Models SRC40,50,60ZIX-S Outdoor unit check points ● Check items with the *mark when the power is ON. DC Reactor continuity Check: 50m or higher, less than 100mΩ. Power transistor module check: Is there a short circuit, open Noise filter check: ＊...
  • Page 57 '12 • SRK-T-126 10.2 Troubleshooting flow List of troubles Remote controller 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) None...
  • Page 58 '12 • SRK-T-126 Troubleshooting Green Error code Content None Remote controller: 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 59 '12 • SRK-T-126 Green Error code Content None Operates but does not heat Remote controller: 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 60 '12 • SRK-T-126 Green Error code Content None Earth leakage breaker activated Remote controller: 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 61 '12 • SRK-T-126 Green Error code Content None Excessive noise/vibration (1/3) Remote controller: – – 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 62 '12 • SRK-T-126 Green Content Error code None Excessive noise/vibration (2/3) Remote controller: – – 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 63 '12 • SRK-T-126 Green Content Error code None Excessive noise/vibration (3/3) Remote controller: – – 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 64 '12 • SRK-T-126 Green Content Error code Louver motor failure None Remote controller: 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 65 '12 • SRK-T-126 Green Error code Content Power supply system error Remote controller: 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 1 and 2 on the terminal block of indoor unit? AC220/230/240V...
  • Page 66 '12 • SRK-T-126 Green Content Error code Power supply system error None Remote controller: (Power supply to remote controller) Keeps flashing Stays OFF Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Isn't there any Correct. loose connection of remote controller wires? 2.
  • Page 67 '12 • SRK-T-126 Green Content Error code INSPECT I/U INSPECT I/U Remote controller: Keeps flashing Stays OFF Indoor (When 1 or 2 remote controllers are connected) 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Are 2 units of remote controller connected? ⑴，...
  • Page 68 '12 • SRK-T-126 Green Content Error code INSPECT I/U INSPECT I/U Remote controller: Keeps flashing Stays OFF Indoor (Connection of 3 units or more remote controller) 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Are more than Reduce to 2 units or less. 3 units of remote controller connected? Does remote...
  • Page 69 '12 • SRK-T-126 Green Error code Content Communication error at Remote controller: WAIT initial operation (1/3) Indoor Keeps flashing Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure When the remote controller LCD displays “ ” 2 WAIT minutes after the power on.
  • Page 70 '12 • SRK-T-126 Green Error code Content Communication error at Remote controller: 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 Isn’t there supply fuse...
  • Page 71 '12 • SRK-T-126 Green Error code Content Communication error at Remote controller: WAIT initial operation (3/3) Indoor Keeps flashing Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure When the remote controller display is extinguished after the power on. Remote controller display is extinguished after the power on.
  • Page 72 '12 • SRK-T-126 Green Content Error code Remote controller Remote controller: 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 73 '12 • SRK-T-126 Green Content Error code Communication error during operation Remote controller: Keeps flashing 2 times 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 74 '12 • SRK-T-126 Green Content Error code Indoor heat exchanger Remote controller: 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 75 '12 • SRK-T-126 Green Content Error code Return air temperature Remote controller: 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 76 '12 • SRK-T-126 Green Content Error code Heating overload operation Remote controller: 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 temperature thermistor...
  • Page 77 '12 • SRK-T-126 Green Content Error code Drain trouble Remote controller: Keeps flashing 1 time flash Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Check the error data in the remote controller. Is there any overflow? 2. Error detection method Float switch is activated Is the Defective indoor control...
  • Page 78 '12 • SRK-T-126 Excessive number of connected Green Content Error code indoor units (more than 17 units) Remote controller: Keeps flashing Stays OFF Indoor by controlling with one remoto controller 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Aren't more than 17 Defective remote controller indoor units connected to one ➞...
  • Page 79 '12 • SRK-T-126 Green Content Error code Indoor fan motor anomaly Remote controller: Keeps flashing Stays OFF 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 80 '12 • SRK-T-126 Green Content Error code Indoor unit operation check, Remote controller: 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) on the indoor control...
  • Page 81 '12 • SRK-T-126 Green Content Error code Remote controller Remote controller: 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. controller temperature thermistor Is the remote connected properly? controller temperature thermistor Detection of anomalously low...
  • Page 82 '12 • SRK-T-126 Green Error code Content Remote controller: 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 83 '12 • SRK-T-126 Green Content Error code Discharge pipe temperature error Remote controller: 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 84 '12 • SRK-T-126 Green Content Error code Outdoor heat exchanger Remote controller: 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 85 '12 • SRK-T-126 Green Content Error code Outdoor air temperature Remote controller: 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 86 '12 • SRK-T-126 Green Content Error code Discharge pipe Remote controller: 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 87 '12 • SRK-T-126 Green Content Error code Remote controller: Current cut (1/2) Indoor control PCB 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 88 '12 • SRK-T-126 Green Error code Content Current cut (2/2) Remote controller: 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 transistor module PCB ➞...
  • Page 89 '12 • SRK-T-126 Green Error code Content Remote controller: 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 90 '12 • SRK-T-126 Green Error code Content Remote controller: 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 91 '12 • SRK-T-126 Green Green Error code Error code Content Content Power transistor anomaly Remote controller: E51 Remote controller: 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 92 '12 • SRK-T-126 Green Error code Content Insufficient refrigerant amount Remote controller: 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 93 '12 • SRK-T-126 Green Green Error code Error code Content Content Current safe stop Keeps flashing Stays Off Indoor Current safe stop Remote controller: E58 Remote controller: Indoor Keeps flashing Stays OFF (Model SRC40 - 60) 3 time flash Outdoor ―...
  • Page 94 '12 • SRK-T-126 Green Error code Content Compressor startup failure Remote controller: 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 95 '12 • SRK-T-126 Green Error code Content Compressor rotor lock error Remote controller: 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 96 '12 • SRK-T-126 11. OPTION PARTS PJA012D730 Installation manual for wired remote controller Connect the remote controller cor 11.1 Installation of wired remote controller (RC-E5) terminal block. Connect the terminal of remote co Read together with indoor unit's installation manual. with the terminal of indoor unit (X, (X and Y are no polarity) WARNING...
  • Page 97 '12 • SRK-T-126 remote controller Connect the remote controller cord to the Sheath Sheath The range of temperature setting Upper Upper terminal block. When shipped, the range of set tem Connect the terminal of remote controller (X,Y) Upper case Upper case Board Board Heating : 16 ~ 30˚C (55 ~ 86˚F)
  • Page 98 '12 • SRK-T-126 PJA0 12D7 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 controller.
  • Page 99 '12 • SRK-T-126 The functional setting The initial function setting for typical using is performed automatically by the indoor unit connected, when remote controller 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 100 '12 • SRK-T-126 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 controller function02 Indoor unit without "Auto-RUN" mode Indoor unit with two or three step of air flow setting Remote controller function06...
  • Page 101 '12 • SRK-T-126 PJA0 12 D73 0 and is automatically defined as following table. Operation message How to set function Function description: electable indoor unit. Function No. Stop air-conditioner and press (SET) (MODE) setting description: Auto-RUN" mode buttons at the same time for over three seconds, and the or three step of air flow setting "FUNCTION SET "...
  • Page 102 '12 • SRK-T-126 11.2 Wireles kit (RCN-TC-24W-ER) PJA012D758 PJA012D758 Notes : WIRELESS KIT INSTALLATION MANUAL Following functions of FDTC Type-F indoor unit series are not able to be set with this wireess remote controller (RCN-TC-24W-ER). 1. Individual flap control system 2.
  • Page 103 '12 • SRK-T-126 PJA012D758 Remote controller Wireless remote controller’s operable area 1 Standard reachable area of the signal Installation of the controller holder [condition] Illuminance at the receiver: 300lux (when no lighting is installed within 1m of the receiver in an ordinary office.) Caution Ceiling surface DO NOT install it on the following places...
  • Page 104 '12 • SRK-T-126 Exterior dimension...
  • Page 105 '12 • SRK-T-126 Indication section Indicates set temperature. Indicates the status of swing louver. Indicates selected operation with Indicates the selected airflow volume Indicates for two seconds when FILTER button is pressed. Indicates when ON-TIMER is set. Indicates when OFF-TIMER is set. Indicates the ON-TIMER setting time.
  • Page 106 '12 • SRK-T-126 11.3 Simple wired remote controller (RCH-E3) Notes : Following functions of Type-F indoor unit series are not able to be set with this simple wired remote controller (RCH-E3). 1. Individual flap control system (for FDTC) 2. 4-fan speed setting (PHi/Hi/Me/Lo) → 3-fan speed setting (Hi/Me/Lo) (for FDTC) Names and functions of sections Remote controller sensor ON/OFF button...
  • Page 107 '12 • SRK-T-126 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 108 '12 • SRK-T-126 In case of exposing cord Simple Remote Controller Installation Manual PJZ012D069 ⑴   M ake certain to remove a screw on the bottom surface of the remote controller. Read together with indoor unit's installation manual. WARNING ⑴ ●   F asten the wiring to the terminal securely and hold the cable securely so as not to apply Screw ⑵ Remove the upper case of the remote controller.
  • Page 109 '12 • SRK-T-126 3. Master/ slave setting when more than one remote controller are used ⑴   U p to two remote controllers can be connected to one unit (or one group) of indoor unit. Switch Setting Function detail Slave remote controller indoor unit SW1-1 Master remote controller...
  • Page 110 connecting section. Be careful about contact failure. unit. (No polarity of X and Y) 100 - 200m･････････････････0.5mm × 2 cores Under 300m･････････････････0.75mm × 2 cores ⑹   M ount the upper case for restoring to its former state so as not to crimp the remote controller cord, Under 400m･････････････････1.25mm ×...
  • Page 111 failure. “88” blinks on the temperature setting indicator. (blinking for approximately 2 to 10 seconds while × 2 cores data is read) Then, the return air temperature is displayed. When AIR CON NO. is pressed, return × 2 cores to the indoor unit selection display (example, “U 000”). ×...
  • Page 112 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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