Page 1: Service Manual
Manual No.'11•SCM-SM-110 updated November 25, 2011 SERVICE MANUAL INVERTER MULTI-SPLIT SYSTEM RESIDENTIAL AIR CONDITIONERS (Split system, air to air heat pump type) (OUTDOOR UNIT) SCM40ZJ-S SCM71ZJ-S1 45ZJ-S 80ZJ-S1 50ZJ-S1 100ZJ-S1 60ZJ-S1 125ZJ-S1 (INDOOR UNIT) Wall mounted type Floor standing type...
Page 2: Table Of Contents
'11 • SCM-SM-110 CONTENTS 1. OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER ....1.1 SRK,SRF and SRR series ..............(1) Operation control function by remote controller ........(2) Unit ON/OFF button ................(3) Auto restart function ................(4) Custom cord switching procedure ............
Page 3 '11 • SCM-SM-110 1.7 External control (remote display) /control of input signal ....39 (1) External control (remote display) output ..........39 (2) Control of input signal ................39 1.8 Protective control function ..............40 (1) Frost prevention control ................ 40 (2) Cooling overload protective control ............
Page 4 ....151 4. PIPING SYSTEMS ..................152 5. INSTALLATION MANUAL................157 5.1 Outdoor units ..................157 ..............157 (1) Models SCM40ZJ-S, 45ZJ-S (2) Models SCM50ZJ-S1, 60ZJ-S1 .............161 (3) Models SCM71ZJ-S1, 80ZJ-S1 .............165 (4) Models SCM100ZJ-S1, 125ZJ-S1 ............169 5.2 Indoor units ....................173 (1) Wall mounted type (SRK) ..............173...
Page 5: Checking Procedure
Ceiling cassette-4way compact type (FDTC) Ceiling suspended type (FDEN) Duct connected Low/Middle static pressure type (FDUM) Outdoor unit to be combined (SCM) SCM40ZJ-S, 45ZJ-S, 50ZJ-S1, 60ZJ-S1, 71ZJ-S1, 80ZJ-S1, 100ZJ-S1, 125ZJ-S1 How to read the model name ■ Indoor unit Example: SRK 20 Z...
Page 6: Outline Of Operation Control By Microcomputer
'11 • SCM-SM-110 1 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER 1.1 SRK, SRF and SRR series (1) Operation control function by remote controller (a) SRK series Models SRK20, 25, 35ZJX-S, 50, 60ZJX-S1, 25, 35ZJR-S, 20, 25, 35, 50ZJ-S Remote controller Operation section FAN SPEED button OPERATION MODE select button...
Page 7 '11 • SCM-SM-110 Model SRK71ZK-S Remote controller Operation section OPERATION MODE select button FAN SPEED button Each time the button pressed, the Each time the button is pressed, the display is switched over in turn. display is switched over in turn. ON/OFF (luminous) button HI POWER/ECONO button Press to start operation, press again to...
Page 8: Operation Section
'11 • SCM-SM-110 (b) SRF series Remote controller Operation section 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. display is switched over in turn. HI POWER/ECONO button ON/OFF (luminous) button This button changes the HIGH POWER/...
Page 9: Unit Display Section
'11 • SCM-SM-110 (c) SRR series Remote controller Operation section Each time the button is pressed, the Each time the button pressed, the display is switched over in turn. display is switched over in turn. Press to start operation, press again to stop.
Page 10: Unit On/Off Button
'11 • SCM-SM-110 Unit ON/OFF button When the remote controller batteries become weak, or if the remote controller 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. Push it once more to turn the unit off. Details of operation The unit will go into the automatic mode in which it automatically determines, from indoor temperature (as detected by sensor), whether to go into the cooling, thermal dry or heating modes.
Page 11: Custom Cord Switching Procedure
'11 • SCM-SM-110 • Model SRK20, 25, 35ZJX-S, 50, 60ZJX-S1, 71ZK-S • Model SRK25, 35ZJR-S, 20, 25, 35, 50ZJ-S SRF25, 35ZJX-S, 50ZJX-S1 SRR25, 35, 50, 60ZJ-S Jumper wire (JA1) Jumper wire (J170) Custom cord switching procedure If two wireless remote controller are installed in one room, in order to prevent wrong operation due to mixed signals, please modify the printed circuit board in the indoor unit’s controlbox and the remote controller using the following procedure.
Page 12: Selection Of The Annual Cooling Function
'11 • SCM-SM-110 (5) Selection of the annual cooling function (a) The annual cooling function can be enabled or disabled by means of the jumper wire (J172 or JA3) on the indoor unit PCB and the dip switch (SW2-4) on the interface kit (optional) PCB. Interface kit Jumper wire (SC-BIKN-E)
Page 13: Econo Operation
'11 • SCM-SM-110 (7) Econo operation Pressing the HI POWER/ECONO button initiate a soft operation with the power suppressed in order to avoid an excessive cooling or heating. The unit operate 1.5℃ higher than the setting temperature during cooling or 2.5℃ lower than that during heating. The remote control displays ECONO mark and the FAN SPEED display disappears.
Page 14 '11 • SCM-SM-110 Louver Model SRK20, 25, 35ZJX-S, 50, 60ZJX-S1, 25, 35ZJR-S, 20, 25, 35, 50ZJ-S   Each time when you press the AIRFLOW (LEFT/RIGHT) button the mode changes as follows. (Louver stopped) (Swing) (Spot) (Wide) Angle of Louver Remote controller display Center installation...
Page 15 '11 • SCM-SM-110 (e) Multi-directional Air Flow (up/down air scroll and left/right air scroll) 〔SRK71ZK-S only〕 Activating both up/down air swing and left/right air swing at the same time results in a multi-directional air flow. Up/down air scroll Left/right air scroll In COOL, DRY and FAN operation In HEAT operation In COOL, DRY and FAN operation...
Page 16: Air Outlet Selection (Srf Series Only)
'11 • SCM-SM-110 Air outlet selection (SRF series only) AIR SELECTION button can switch between the combination of upper and lower air outlets and upper air outlet. Not operable while the air conditioner is OFF. Each time the AIR SELECTION button is pressed. The combination of the upper and lower air outlets and the upper air outlet can be switched.
Page 17: Timer Operation
'11 • SCM-SM-110 Air flow direction is controlled according to the indoor temperature and setting temperature. When D auto operation starts Cooling Heating Flap Up/down Swing Wide (fixed) Center (fixed) Louver When Indoor temp. – Setting temp. is < = ºC during cooling and when Setting temp.
Page 18: Installation Location Setting (Srk Series Only)
'11 • SCM-SM-110 (12) Installation location setting (SRK series only) (Except SRK71ZK-S model) When the indoor unit is installed at the end of a room, control the air flow direction so that it is not toward the side walls. If you set the remote controller installation position, keep it so that the air flow is within the range shown in the following figure.
Page 19: Drain Motor (Dm) Control (Srr Series Only)
'11 • SCM-SM-110 (14) Drain motor (DM) control (SRR series only) (a) Drain motor (DM) is operated during the cooling or dehumidifying mode operations and simultaneously wity the compres- sor ON. The DM continues to operate for minutes after the operation stop, anomalous stop, thermostat stop or when it was switched from the cooling and dehumidifying operations to the fan or heating operation.
Page 20: Fdtc, Fden And Fdum Series
'11 • SCM-SM-110 FDTC, FDEN and FDUM series (1) Remote controller (Optional parts) Wired remote controller (i) Remote controller (RC-E4) 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 21 '11 • SCM-SM-110 (ii) Remote controller (RC-E5) 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 22 '11 • SCM-SM-110 Wireless remote controller 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.
Page 23: Operation Control Function By The Wired Remote Controller
'11 • SCM-SM-110 Operation control function by the wired remote controller Switching sequence of the operation mode switches of remote controller [CPU reset] This functions when “CHECK” and “GRILL” buttons on the remote controller are pressed simultaneously. Operation is same as that of the power supply reset.
Page 24: Operation Control Function By The Indoor Controller
'11 • SCM-SM-110 Operation control function by the indoor controller 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 25 '11 • SCM-SM-110 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 26 '11 • SCM-SM-110 Once the fan motor is changed from OFF to ON during the thermostat ON, the indoor fan motor is not turned OFF even if the heat exchanger thermistor detects lower than °C. Note () When the defrost control signal is received, it complies with the fan control during defrosting. Once the hot start is completed, it will not restart even if the temperature on the heat exchanger thermistor drops.
Page 27 '11 • SCM-SM-110 When the “Low fan speed (Factory default)” is selected, the following taps are used for the indoor fans. ・ For AC motor : Lo tap ・ For DC motor : ULo tap When the “Set fan speed” is selected, it is operated with the set fan speed also in the thermostat OFF condition. If the “Intermittence”...
Page 28 '11 • SCM-SM-110 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 29 '11 • SCM-SM-110 (m) Drain motor (DM) control [Applicable model: FDTC and FDUM] ( i ) Drain detection switch is turned ON or OFF with the float switch (FS) and the timer. Drain detection switch ON Normal state Normal state [*1] [*2] [ ＊...
Page 30 '11 • SCM-SM-110 Selection of indoor fan speed If it enters the frost prevention control during cooling operation (excluding dehumidifying), the indoor unit fan speed is switched. In cases of FDEN When the indoor unit return air temperature (detected with ThI-A) is 23°C or lower, this control is invalidated and, as 2 hours elapse after starting the frost prevention control, it is terminated.
Page 31 '11 • SCM-SM-110 SW2 : For setting of 0 – 9, A – F Outdoor unit SCM**ZJ type Outdoor unit SCM**ZJ type Wirings between outdoor unit and indoor units Indoor unit Remote controller () Unit No. may be set at random unless duplicated, it should be better to set orderly like 0, , …, F to avoid mistake. Display to the remote controller Center or each remote controller basis, heating preparation: the youngest unit No.
Page 32 '11 • SCM-SM-110 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...
Page 33 '11 • SCM-SM-110 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”...
Page 34 '11 • SCM-SM-110 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 35: Outline Of Heating Operation
'11 • SCM-SM-110 1.3 Outline of heating operation (1) Summary (a) Capacity control 1) Indoor unit SRK ** ZJX models only Model SCM40ZJ-S SCM45ZJ-S SCM50ZJ-S1 SCM60ZJ-S1 SCM71ZJ-S1 SCM80ZJ-S1 Capacity 1.4 6.9 kW 1.4 7.4 kW 1.4 7.5 kW 1.5 7.8 kW 1.5 9.4 kW...
Page 36: Defrosting Operation
'11 • SCM-SM-110 (4) Defrosting operation Tho-R Tho-A Tho-R (Tho-A) (Tho-R) > = 0.44 × (Tho-A) + A Tho-A 2 °C < = Tho-A 4(6.5) 15 °C < = Tho-A < 2 °C 6(10.0) Tho-A < 15 °C 6(10.0) Note (1) Values in ( ) are for the model SCM100, 125. Defrost operation start Defrost operation...
Page 37: Outline Of Cooling Operation
'11 • SCM-SM-110 1.4 Outline of cooling operation (1) Summary (a) Capacity control 1) Indoor unit SRK ** ZJX models only Model SCM40ZJ-S SCM45ZJ-S SCM50ZJ-S1 SCM60ZJ-S1 SCM71ZJ-S1 SCM80ZJ-S1 Capacity 1.8 5.9 kW 1.8 6.4 kW 1.8 7.1 kW 1.8 7.5 kW 1.8 8.8 kW...
Page 38: Outline Of Automatic Operation
'11 • SCM-SM-110 1.5 Outline of automatic operation (1) Determination of operation mode (a) SRK20, 25, 35, 50, 60ZJX, SRF and SRR series The unit checks the indoor air temperature and the outdoor air temperature after operating the indoor and outdoor blowers for 0 seconds, determines the operation mode and the indoor air temperature setting correction value, and then enters in the automatic operation.
Page 39: Operation Permission/Prohibition Control
'11 • SCM-SM-110 Signals of wireless remote controller (Display) –6 –5 –4 –3 –2 –1 Cooling Setting Dehumidifying temperature Heating ) When the unit is operated automatically with the wired remote controller connected, the cooling operation is controlled ac- cording to the display temperatures while the setting temperature is compensated by +°C during dehumidifying or by +°C during heating.
Page 40: External Control (Remote Display) /Control Of Input Signal
'11 • SCM-SM-110 1.7 External control (remote display) /control of input signal (Refer to the FDTC, FDEN and FDUM series by 31 page) (1) External control (remote display) output Following output connectors (CNT) are provided on the printed circuit board of indoor unit. Note () Please install the separately-sold Interface kit (SC-BIK-E).
Page 41: Protective Control Function
'11 • SCM-SM-110 1.8 Protective control function (1) Frost prevention control (a) Operating conditions (b) Detail of anti-frost operation Reset Operation mode Protective Protective control Reset Item control Forced outage Operation instruction Compressor operation Depends on operation mode Indoor fan Indoor heat exchanger (c) Reset conditions: temperature (ºC)
Page 42: Cooling Low Outdoor Temperature Protective Control
② The upper limit of compressor command speed is set to A or C rps, the speed is kept to A or C rps. Upper limit C rps Lower limit D rps Upper limit A rps Lower limit B rps Outdoor air temperature.(°C) Values of A ~ D Model SCM40ZJ-S SCM45ZJ-S SCM50ZJ-S1 SCM60ZJ-S1 SCM71ZJ-S1 SCM80ZJ-S1 75 rps 75 rps...
Page 43: Heating High Pressure Control
'11 • SCM-SM-110 (5) Heating high pressure control (a) Indoor unit side 1) Start condition: When the indoor heat exchanger temperature (Th) has become higher than the start temperature for minute continuously. 2) Contents of control: Compressor stop Item Indoor Release temperature Start temperature...
Page 44: Heating Overload Protective Control
'11 • SCM-SM-110 (6) Heating overload protective control (a) Indoor unit side Tho-A 1) Operating conditions : (SRK71ZK-S:10th, SRF, SRR:9th) 2) Detail of operation : 3) Reset conditions : Tho-A Note (1) FDTC, FDEN and FDUM serise:Refer to page 29. (b) Outdoor unit side or 17 (model 60, 71, 80:13...
Page 45: Freezing Cycle System Protective Control
'11 • SCM-SM-110 (8) Freezing cycle system protective control (a) Starting condition: This control starts when the following conditions are met. ) 　 When it has elapsed 0 minutes after the compressor was changed from OFF to ON in the cooling operation mode for more than minutes.
Page 46: Current Safe
'11 • SCM-SM-110 Item Cooling Heating Model SCM40, 45, 50 32 rps 32 rps Lower limit speed SCM60, 71, 80, 100, 125 25 rps 32 rps (12) Current safe �Model SCM40, 45, 50, 60, 71, 80 (a) Purpose: (b) Detail of operation: (c) Current safe control value: Set this using the jumper wire (J1 or J2) on the outdoor PCB.
Page 47: Current Cut
(b) Once the unit is stopped by this function, it is not restarted. Notes () Tho-D(X): After compressor operation, the discharge pipe sensor temperature after X minutes. () Tho-A(X): After compressor operation, the outdoor air sensor temperature after X minutes. • Values of A, B Model SCM40ZJ-S SCM45ZJ-S SCM50ZJ-S1 SCM60ZJ-S1 SCM71ZJ-S1...
Page 48: Serial Signal Transmission Error Protection
'11 • SCM-SM-110 (18) Serial signal transmission error protection (a) Purpose: (b) Detail of operation: (19) Rotor lock (Model SCM40, 45, 50, 60, 71, 80 only) (20) Outdoor fan motor protection (21) Outdoor fan control at low outdoor temperature Cooling Model SCM40, 45, 50, 60, 71, 80 Tho-A (a) Operating conditions:...
Page 49: Outdoor Unit Fan Control At Overload
'11 • SCM-SM-110 High pressure sensor (HPS) 1.50MPa high pressure sensor is lower than 1.50 MPa, gradually reduce the outdoor fan speed by 1 speed. Lower limit speed Outdoor air temperature > 16˚C Outdoor air temperature < = 16˚C 1.50MPa High pressure sensor (HPS) 2.72MPa high pressure sensor 1.50MPa ~ 2.72MPa, High pressure sensor (HPS) 2.72MPa...
Page 50: Anomalous Power Transistor
'11 • SCM-SM-110 (23) Anomalous power transistor (SCM100, 125 only) When anomalous rise of the power transistor temperture is detected for minutes continuosly. (24) Power transistor overheat protection (SCM100, 125 only) (a) Purpose: Prevention of malfunction, deterioration, breakage, etc. of the control (b) Contents of restriction Restricts the speed of compressor when the temperature of power transistor (Tho-AF) rises higher than 0°C.
Page 51: Maintenance Data
'11 • SCM-SM-110 2 MAINTENANCE DATA 2.1 SRK, SRF and SRR series (1) Cautions (2) Items to check before troubleshooting (3) Troubleshooting procedure (If the air conditioner does not run at all) Important...
Page 52: Troubleshooting Procedure (If The Air Conditioner Runs)
'11 • SCM-SM-110 (4) Troubleshooting procedure (If the air conditioner runs) 54 ~ 62. 54 ~ 62.
Page 53: Self-Diagnosis Table
'11 • SCM-SM-110 (5) Self-diagnosis table (i) SCM40, 45, 50, 60, 71, 80 Wired Outdoor Indoor unit display panel remote Description main PCB Cause Display (flashing) condition controller TIMER of trouble Red LED display light light When a heat exchanger sensor 1 wire disconnection is detected while •...
Page 54 '11 • SCM-SM-110 (ii) SCM100,125 Wired Outdoor Indoor unit display panel remote Description main PCB Cause Display (flashing) condition controller TIMER of trouble Red LED display light light • Broken heat exchanger sensor When a heat exchanger sensor 1 wire disconnection is detected while 1 time Stays 1 wire, poor connector...
Page 55: Service Mode (Trouble Mode Access Function)
'11 • SCM-SM-110 (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 controller. These are the contents of error displays and protective stops which occurred in the past in the air conditioner system.
Page 56 '11 • SCM-SM-110 1) Self-diagnosis data Remote controller setting Contents of output data Indicates the number of Remote controller 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 3 times previous...
Page 57: Remote Controller Setting
'11 • SCM-SM-110 (Example) Remote controller setting Operation Displayed data Temperature Fan speed switching switching setting 21ºC Displays the reason for the stop (error code) the previous time an error was displayed. Displays the reason for the stop (error code) 2 times previous when an error was displayed. 22ºC Displays the reason for the stop (error code) 3 times previous when an error was displayed.
Page 58 '11 • SCM-SM-110 (c) Error code, stop code table (i) Model SCM40, 45, 50, 60, 71, 80 Number of flashes when in service mode Stop coad Error Auto TIMER Error content Cause Occurrence conditions display recovery light light Error coad (10's digit) (1's digit) Normal...
Page 59 '11 • SCM-SM-110 (ii) SCM100,125 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. When 35 seconds passes without 5 times seconds...
Page 60 '11 • SCM-SM-110 Number of flashes when in service mode Stop coad Error Auto TIMER Error content Cause Occurrence conditions display recovery light light Error coad (10's digit) (1's digit) Indoor fan motor is faulty. When the indoor unit's fan motor is detected to be running Indoor unit's fan motor is Connector connections are poor.
Page 61 '09•SRK-DB-087D '11 • SCM-SM-110 (d) Remote controller 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 62 '09•SRK-DB-087D '11 • SCM-SM-110 (e) Room temperature sensor, indoor heat exchanger sensor, outdoor air temperature sensor, outdoor heat exchanger sensor , suction 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 Sensor name...
Page 63 '09•SRK-DB-087D '11 • SCM-SM-110 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 64 '11 • SCM-SM-110 Service data record form...
Page 65: Inspection Procedures Corresponding To Detail Of Trouble
'11 • SCM-SM-110 (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,outdoor suction pipe temp.) - 10 Temperature (˚C)
Page 66: Current Cut
'11 • SCM-SM-110 Limit switch anomaly (SRK20, 25, 35, 50, 60ZJX only) Defective limit switch, defective indoor control PCB, Defective air inlet panel set Is the air inlet panel set correctly? Correction, re-set Are limit switch OK ? Defective limit switch Note(1) Check if the limit switch functions properly or not by seeing whether the lamp continues to blink or can be reset by pressing the limit swit- -ch by hand while the air inlet panel is removed.
Page 67: Over Heat Of Compressor
'11 • SCM-SM-110 Over heat of compressor Gas shortage, defective discharge pipe sensor main Error of signal transmission Wiring error including power cable, defective indoor/ outdoor PCB indoor indoor outdoor sub...
Page 68: Outdoor Fan Motor Error
'11 • SCM-SM-110 Trouble of outdoor unit Insufﬁcient refregerant amount, Faulty power transistor, Broken compressor wire Service valve close, Defective EEV, Defective outdoor PCB main Notes (1) main Check coil resistance, See pages 65. Outdoor fan motor error Defective fan motor, connector poor connection, defective outdoor PCB the fan motor and outdoor Replace outdoor fan motor...
Page 69: Phenomenon Observed After Shortcircuit, Wire Breakage On Sensor
'11 • SCM-SM-110 Rotor lock (SCM40, 45, 50, 60, 71, 80 only) Defective compressor, defective outdoor PCB main See pages 65. Drain abnormality (SRR only) [Drain piping defective,pump defect, float switch, indoor PCB] Indoor PCB is Has an overflow developed? Is the float switch operating? defective.
Page 70: Checking The Indoor Electrical Equipment
'11 • SCM-SM-110 (b) Outdoor unit Phenomenon Operation Sensor mode Shortcircuit Disconnected wire Cooling Heat exchanger sensor Defrosting is performed for 10 minutes at approx. 40 minutes. Heating Cooling Ourdoor air temperature sensor Defrosting is performed for 10 minutes at approx. 40 minutes. Heating Discharge pipe All modes...
Page 71: How To Make Sure Of Wireless Remote Controller
'11 • SCM-SM-110 (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.
Page 72: Outdoor Unit Inspection Points
CAUTION- HIGH VOLTAGE High voltage is produced in the control box. Don't touch electrical parts in the control box for 5 minutes after the unit is stopped. ◆Inspection power transistor Remove the fasten terminal and test Color Marks output voltage Mark Color Power supply...
Page 73 CAUTION- HIGH VOLTAGE High voltage is produced in the control box. Don't touch electrical parts in the control box for 5 minutes after the unit is stopped. Inspection power transistor Remove the fasten terminal and test Color Marks output voltage Mark Color Black...
Page 74 CAUTION- HIGH VOLTAGE High voltage is produced in the control box. Don't touch electrical parts in the control box for 5 minutes after the unit is stopped. ◆Inspection power transistor Color Marks Power supply Remove the fasten terminal and test Mark Color 1 Phase...
Page 75 CAUTION- HIGH VOLTAGE High voltage is produced in the control box. Don't touch electrical parts in the control box for 5 minutes after the unit is stopped. Color Marks Mark Color POWER SOURCE Black ～ 220/230/240V Circuit breaker 50Hz Blue Brown Earth leakage breaker Green...
Page 76 CAUTION- HIGH VOLTAGE High voltage is produced in the control box. Don't touch electrical parts in the control box for 5 minutes after the unit is stopped. Color Marks Mark Color Black POWER SOURCE Blue ～ 220/230/240V Circuit breaker Brown 50Hz Green Earth leakage breaker...
Page 77 '11 • SCM-SM-110 (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 main main outdoor (SCM100,125: main main Models SCM40, 45, 50, 60, 71, 80 Models SCM100,125 ⑥...
Page 78: Fdtc, Fden And Fdum Series
'11 • SCM-SM-110 2.2 FDTC, FDEN and FDUM series 2.2.1 Diagnosing of microcomputer circuit Selfdiagnosis function (a) Check indicator table Whether a failure exists or not on the indoor unit and outdoor unit can be know by the contents of remote controller error code, indoor/outdoor unit green LED (power pilot lamp and microcomputer normality pilot lamp) or red LED (check pilot lamp).
Page 79 '11 • SCM-SM-110 (ii) Outdoor unit (a) Model SCM40 , 45 , 50 , 60 , 71 , 80 Outdoor Remote controller Indoor control PCB Reference main PCB Location of trouble Description of trouble Repair method page Green Error code Red LED Red LED Red LED Installation, operation status •...
Page 80 '11 • SCM-SM-110 (b) Model SCM100, 125 Outdoor Remote controller Indoor control PCB Reference control PCB Location of trouble Description of trouble Repair method page Green Error code Red LED Red LED Red LED Installation, cooling operation status • Higher outdoor high pressure Repair Replacement, repair Keeps...
Page 81 '11 • SCM-SM-110 (iv) Display sequence of error codes or inspection indicator lamps ■ Occurrence of one kind of error Displays are shown respectively according to errors. ■ Occurrence of plural kinds of error Section Category of display Error code on remote controller •...
Page 82: Troubleshooting Procedure
'11 • SCM-SM-110 ■ Error log and reset Error indicator Memorized error log Reset Remote controller display • Higher priority error is memorized. • Stop the unit by pressing the ON/OFF switch of remote controller. Red LED on indoor control PCB •...
Page 83 '11 • SCM-SM-110 (i) FDTC series PSB012D931F • Control PCB 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...
Page 84 '11 • SCM-SM-110 • Power PCB PSB012D953A This PCB is a general PCB. Replace the PCB according to this instruction. ① Replace the PCB (refer to right dwg.) 1. Unscrew terminal of the wiring(yellow/green) soldered to PCB from the box. 2.
Page 85 '11 • SCM-SM-110 (ii) FDEN series PSB012D974 Set to an appropriate address and function using switch on PCB. There is a unit having plural applicable PCB depending on a model. Set the function setting corresponding the spare PCB and the applicable model. item switch Content of control...
Page 86 '11 • SCM-SM-110 (iii) FDUM series PSB012D990 • Control PCB 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...
Page 87 '11 • SCM-SM-110 • Power PCB PSB012D992 This PCB is a general PCB. Replace the PCB according to this instruction. ① Replace the PCB 1. Unscrew terminal of the wiring(yellow/green) connected to Terminal block (CNWO) from the box. 2. Replace the PCB only after all the wirings connected to the connector are removed. 3.
Page 88 '11 • SCM-SM-110 ●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 89: Check Of Anomalous Operation Deta With The Remote Controller
'11 • SCM-SM-110 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 90: Inverter Checker For Diagnosis Of Inverter Output
'11 • SCM-SM-110 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 91: Troubleshooting Flow
'11 • SCM-SM-110 2.2.2 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 92: Troubleshooting
'11 • SCM-SM-110 Troubleshooting Green Content Error code Keeps flashing Stays OFF Indoor None Operates but does not cool Remote controller: – Stays OFF Outdoor 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 93 '11 • SCM-SM-110 Green Content Error code Keeps flashing Stays OFF Indoor None Operates but does not heat Remote controller: – Stays OFF Outdoor 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 94 '11 • SCM-SM-110 Green Error code Content Stays OFF Stays OFF Indoor None Earth leakage breaker activated Remote controller: Outdoor – Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Are OK the insulation resistance and Replace compressor. coil resistance of compressor? 2.
Page 95 '11 • SCM-SM-110 Green Error code Content – – Indoor None Excessive noise/vibration (1/3) Remote controller: – – Outdoor 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-...
Page 96 '11 • SCM-SM-110 Green Error code Content – – Indoor None Excessive noise/vibration (2/3) Remote controller: – – Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure From previous page Rearrange the piping to Are the pipes avoid contact with the contacting the casing.
Page 97 '11 • SCM-SM-110 Green Error code Content – – Indoor None Excessive noise/vibration (3/3) Remote controller: – – Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure From previous page If insufficient cooling/ Adjustment heating problem happens during commissioning due to anomalous operating Does noise/vibration occur when the conditions at cooling/...
Page 98 '11 • SCM-SM-110 Green Error code Content Louver motor failure Keeps flashing Stays OFF Indoor None Remote controller: (FDTC and FDEN series) – Stays OFF Outdoor 5. Troubleshooting 1. Applicable model FDTC and FDEN series only Diagnosis Countermeasure � Check at the indoor unit side. Operate after waiting for more than 1 minute.
Page 99 '11 • SCM-SM-110 Green Power supply system error Error code Content Stays OFF Stays OFF Indoor None Remote controller: (Power supply to indoor control PCB) – Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure AC220/240V detected between � and �...
Page 100 '11 • SCM-SM-110 Green Error code Content Power supply system error Keeps flashing Stays OFF Indoor None Remote controller: (Power supply to remote controller) – Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Isn't there any Correct.
Page 101: Troubleshooting
'11 • SCM-SM-110 Green Error code Content INSPECT I/U Keeps flashing Stays OFF Indoor INSPECT I/U Remote controller: (When 1 or 2 remote controllers are connected) – Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Are 2 units of remote controller connected? Set one remote controller...
Page 102 '11 • SCM-SM-110 Green Error code Content INSPECT I/U Keeps flashing Stays OFF Indoor INSPECT I/U Remote controller: (Connection of 3 units or more remote controller) – Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Are more than Reduce to 2 units or less.
Page 103 '11 • SCM-SM-110 Green Error code Content Communication error at Indoor Keeps flashing Stays OFF Remote controller: WAIT initial operation (1/3) – Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure When the remote controller LCD displays “ ”...
Page 104 '11 • SCM-SM-110 Green Error code Content Communication error at Indoor Keeps flashing Stays OFF Remote controller: WAIT initial operation (2/3) – Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure When the fuse is blown, the method to inspect outdoor sub PCB before replacing the power Isn’t there...
Page 105 '11 • SCM-SM-110 Green Error code Content Communication error at Indoor Keeps flashing Stays OFF Remote controller: WAIT initial operation (3/3) – Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure When the remote controller display is extinguished after the power on.
Page 106 '11 • SCM-SM-110 Green Error code Content Remote controller Keeps flashing Stays OFF Indoor Remote controller: communication circuit error – Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Malfunction by noise Is it possible to Check peripheral reset normally by the power reset? environment.
Page 107 '11 • SCM-SM-110 Green Error code Content Keeps flashing 2 times flash Indoor Communication error during operation Remote controller: – 6 times flash Outdoor 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 108 '11 • SCM-SM-110 Green Error code Content Indoor heat exchanger Keeps flashing 1 time flash Indoor Remote controller: temperature thermistor anomaly – Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the connection of indoor heat Correct.
Page 109 '11 • SCM-SM-110 Green Error code Content Return air temperature Keeps flashing 1 time flash Indoor Remote controller: thermistor anomaly – Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the connection of return Correct. ➞ Connect air temperature thermistor connector.
Page 110 '11 • SCM-SM-110 Green Error code Content Keeps flashing 1 time flash Indoor Heating overload operation Remote controller: – Stays OFF Outdoor 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...
Page 111 '11 • SCM-SM-110 Green Error code Content Drain trouble Keeps flashing 1 time flash Indoor Remote controller: （ FDTC and FDUM series ） – Stays OFF Outdoor 5. Troubleshooting 1. Applicable model FDTC and FDUM series only Diagnosis Countermeasure Check the error data in the remote controller. Is there any overflow? Is DC 12V at CNI connector.
Page 112 '11 • SCM-SM-110 Excessive number of connected Green Error code Content indoor units (more than 17 units) Keeps flashing Stays OFF Indoor Remote controller: by controlling with one remoto controller Outdoor – Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Aren't more than 17...
Page 113 '11 • SCM-SM-110 Green Content Error code Indoor fan motor anomaly Keeps flashing 1 time flash Indoor Remote controller: （ FDTC and FDUM series ） – Stays OFF Outdoor 5. Troubleshooting 1. Applicable model FDTC and FDUM series only Diagnosis Countermeasure Does any foreign material...
Page 114 '11 • SCM-SM-110 Green Content Error code Indoor unit operation check, Keeps flashing 1 time flash Indoor Remote controller: drain motor check setting error – Stays OFF Outdoor 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 115 '11 • SCM-SM-110 Indoor fan motor rotation Green Content Error code speed anomaly Keeps flashing 1 time flash Indoor Remote controller: （ FDTC and FDUM series ） Outdoor Keeps flashing Stays OFF 5. Troubleshooting 1. Applicable model FDTC and FDUM series only Diagnosis Countermeasure Does any...
Page 116 '11 • SCM-SM-110 Green Content Error code Remote controller Keeps flashing Stays OFF Indoor Remote controller: temperature thermistor anomaly – Stays OFF Outdoor 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?
Page 117 '11 • SCM-SM-110 Green Error code Content Cooling high pressure operation Indoor Keeps flashing Stays OFF Remote controller: （ Model SCM40, 45, 50, 60, 71, 80 ） – 2 times flash Outdoor 5. Troubleshooting 1. Applicable model Model SCM40, 45, 50, 60, 71, 80 Diagnosis Countermeasure only...
Page 118 '11 • SCM-SM-110 Green Error code Content Cooling high pressure operation Indoor Keeps flashing Stays OFF Remote controller: （ Model SCM100 , 125 ） – 2 times flash Outdoor 5. Troubleshooting 1. Applicable model Model SCM100, 125 only Diagnosis Countermeasure * For the characteristics of high pressure sensor, refer to E54.
Page 119 '11 • SCM-SM-110 Green Error code Content Keeps flashing Stays OFF Indoor Discharge pipe temperature error Remote controller: – 5 times flash Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure * For the characteristics of discharge Are the pipe temperature, refer to E39.
Page 120 '11 • SCM-SM-110 Green Error code Content Outdoor heat exchanger Keeps flashing Stays OFF Indoor Remote controller: temperature sensor anomaly Outdoor – 8 times flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the outdoor heat exchanger temperature Correct connector.
Page 121 '11 • SCM-SM-110 Green Content Error code Outdoor air temperature Keeps flashing Stays OFF Indoor Remote controller: sensor anomaly – 8 times flash Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure the suction pipe Correct connector. temperature sensor connector connected properly? For the characteristics of suction pipe temperature sensor, see the following graph.
Page 122: Discharge Pipe
'11 • SCM-SM-110 Green Error code Content Discharge pipe Keeps flashing Stays OFF Indoor Remote controller: temperature sensor anomaly Outdoor – 8 times flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the discharge pipe temperature sensor Correct connector. connector connected properly? 2.
Page 123 '11 • SCM-SM-110 Green Error code Content Heating high pressure operation Indoor Keeps flashing Stays OFF Remote controller: （ Model SCM100 , 125 ） – 2 times flash Outdoor 5. Troubleshooting 1. Applicable model Model SCM100,125 only Diagnosis Countermeasure * For the characteristics of high pressure sensor, refer to E54.
Page 124 '11 • SCM-SM-110 Green Content Error code Power transistor overheat Indoor Keeps flashing Stays OFF Remote controller: 　　 (Model SCM100, 125) Outdoor 1 time flash – 5. Troubleshooting 1. Applicable model Model SCM100, 125 only Diagnosis Countermeasure Is the installation space of outdoor unit enough? Correct.
Page 125 '11 • SCM-SM-110 Green Error code Content Keeps flashing Stays OFF Indoor Current cut (1/2) Remote controller: Outdoor – 1 time flash 5. Troubleshooting 1. Applicable model Diagnosis Countermeasure All models Is the Power supply Check power supply. voltage OK? 2.
Page 126 '11 • SCM-SM-110 Green Content Error code Keeps flashing Stays OFF Indoor Current cut (2/2) Remote controller: Outdoor – 1 time flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure From previous page Is the checked result of power •...
Page 127: Communication Error
'11 • SCM-SM-110 Green Error code Content Outdoor sub PCB Indoor Keeps flashing Stays OFF Remote controller: communication error Outdoor – 4 times flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the connector connection between the outdoor Correct connector.
Page 128 '11 • SCM-SM-110 Green Error code Content Active filter voltage error Indoor Keeps flashing Stays OFF Remote controller: （ Model SCM40, 45, 50, 60, 71, 80 ） – 2 times flash Outdoor 5. Troubleshooting 1. Applicable model Model SCM40, 45, 50, 60, 71, 80 Diagnosis Countermeasure only...
Page 129 '11 • SCM-SM-110 Green Error code Content Indoor Keeps flashing Stays OFF Remote controller: Outdoor fan motor anomaly – Keeps flashing Outdoor 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 130 '11 • SCM-SM-110 Green Green Error code Error code Content Content Power transistor anomaly Indoor Keeps flashing Stays OFF Remote controller: Remote controller: E51 Power transistor error Keeps flashing Stays Off Indoor （ Model SCM40, 45, 50, 60, 71, 80 ） Outdoor –...
Page 131 '11 • SCM-SM-110 Green Content Error code Inverter and fan motor anomaly Indoor Keeps flashing Stays OFF Remote controller: （ Model SCM100 , 125 ） Outdoor – 1 time flash 5. Troubleshooting 1. Applicable model Model SCM100, 125 only Diagnosis Countermeasure Is DC15V detected between the connector...
Page 132 '11 • SCM-SM-110 Green Content Error code Suction pipe temperature Keeps flashing Stays OFF Indoor Remote controller: sensor anomaly – 8 times flash Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure the suction pipe Correct connector. temperature sensor connector connected properly? For the characteristics of suction pipe temperature sensor, see the following graph.
Page 133 '11 • SCM-SM-110 Green Error code Content High pressure sensor anomaly Indoor Keeps flashing Stays OFF Remote controller: （ Model SCM100 , 125 ） Outdoor – 8 times flash 5. Troubleshooting 1. Applicable model Model SCM100, 125 only Diagnosis Countermeasure Are the connection of high pressure Correct high pressure sensor...
Page 134 '11 • SCM-SM-110 Green Error code Content Insufficient refrigerant amount Indoor Keeps flashing Stays OFF Remote controller: or detection of service valve closure Outdoor – 2 times flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the Open fully. service valve fully opened? Are the...
Page 135 '11 • SCM-SM-110 Green Green Error code Error code Content Content Current safe stop Current safe stop Indoor Keeps flashing Stays OFF Keeps flashing Stays Off Indoor Remote controller: Remote controller: E58 （ Model SCM40, 45, 50, 60, 71, 80 ） (Model SRC40 - 60) –...
Page 136 '11 • SCM-SM-110 Green Error code Content Indoor Keeps flashing Stays OFF Compressor startup failure Remote controller: Outdoor – 2 times flash 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...
Page 137 '11 • SCM-SM-110 Green Content Error code Compressor rotor lock error Keeps flashing Stays OFF Indoor Remote controller: （ Model SCM40, 45, 50, 60, 71, 80 ） – 7 times flash Outdoor 5. Troubleshooting 1. Applicable model Model SCM40, 45, 50, 60, 71, 80 Diagnosis Countermeasure only...
Page 138: Electrical Wirings
Indication lamp Color Function WIRING DIAGRAM Led e （1） Warning lamp Self diagnosis function by led e 1 Time flash Current cut FUSE 250V 15A 2 Time flash Trouble of outdoor unit 3 Time flash Over current POWER SUPPLY 4 Time flash Transmission error Y／G Y／G...
Page 139 Indication lamp Color Function WIRING DIAGRAM Led e Warning lamp Self diagnosis function by led e FUSE 1 Time flash Current cut 250V 15A 250V 20A 2 Time flash Trouble of outdoor unit 3 Time flash Over current POWER SUPPLY 4 Time flash Transmission error 5 Time flash...
Page 140 Indication lamp Color Function FUSE 250V 20A Led e Warning lamp Self diagnosis function by led e POWER SUPPLY 1 Time flash Current cut 2 Time flash Trouble of outdoor unit 3 Time flash Over current 4 Time flash Transmission error CNMAIN CNSUB UNIT A...
Page 141 Mark Name POWER SOURCE A/F MODULE Active filter module 220/230/240V Crankcase heater 50Hz 30A 250V Compressor motor CNACT1 CNACT PWB5 PWB3 CNA Z Connector NOISE NOISE Current sensor FILTER FILTER Diode stack TB7 TB8 MODULE Electronic expansion coil EEV-H Electronic expansion coil For heating Fuse Fan motor High pressure sensor...
Page 142 Mark Name POWER SOURCE A/F MODULE Active filter module 220/230/240V Crankcase heater 50Hz 30A 250V Compressor motor CNACT1 CNACT PWB5 PWB3 CNA Z Connector NOISE NOISE Current sensor FILTER FILTER Diode stack TB7 TB8 MODULE Electronic expansion coil EEV-H Electronic expansion coil For heating Fuse Fan motor High pressure sensor...
Page 143: Indoor Units
Item Description CNE-CNY Connector Fan motor DISPLAY Flap motor WIRELESS RECEIVER CNX1 Louver motor BACK-UP SW Inlet motor PRINTED CIRCUIT Room temp. sensor BOARD Heat exch. sensor Limit switch CNX2 Diode stack Fuse Terminal block Varistor INTERFACE KIT SC-BIKN-E Color Marks Mark Color Black...
Page 144 Item Description CNE-CNY Connector Fan motor DISPLAY Flap motor PRINTED WIRELESS RECEIVER CNX1 CIRCUIT Louver motor BACK-UP SW BOARD Inlet motor Room temp. sensor Heat exch. sensor Humidity sensor CNX2 Limit switch Diode stack Fuse Terminal block Varistor INTERFACE KIT SC-BIKN-E Color Marks Mark...
Page 145: Circuit Board
Item Description CNE-CNY Connector Fan motor Flap motor Louver motor Humidity sensor Room temp. sensor Heat exch. sensor Diode stack Fuse PRINTED Terminal block CIRCUIT Varistor BOARD HEAT EXCHANGER Mark Color 250V 3.15A Black Blue White Yellow Yellow Green HEAT EXCHANGER DISPLAY WIRELESS...
Page 146 Item Description CNE-CNX2 Connector Fan motor DISPLAY Flap motor CNX1 WIRELESS RECEIVER Louver motor BACK-UP SW PRINTED Room temp. sensor CIRCUIT Heat exch. sensor BOARD Humidity sensor Diode stack CNX2 Fuse Terminal block Varistor INTERFACE KIT SC-BIKN-E Color Marks Mark Color Y／G Black...
Page 147: Floor Standing Type (Srf)
Item Description CNE-CNX2 Connector DISPLAY Fan motor WIRELESS RECEIVER Flap motor BACK-UP SW CNX1 Damper motor AIR SELECTION SW Damper arm motor PRINTED CIRCUIT Room temp. sensor BOARD Heat exch. sensor Humidity sensor CNX2 Diode stack Fuse Terminal block Varistor INTERFACE KIT SC-BIKN-E Color Marks...
Page 148 Item Description CNE-CNX2 Connector DISPLAY Fan motor WIRELESS RECEIVER Flap motor BACK-UP SW CNX1 PRINTED Damper motor AIR SELECTION SW CIRCUIT Damper arm motor BOARD Room temp. sensor Heat exch. sensor Humidity sensor CNX2 Diode stack Fuse Terminal block Varistor INTERFACE KIT SC-BIKN-E Color Marks...
Page 149: Ceiling Concealed Type (Srr)
CONTROL INTERFACE KIT SC-BIKN-E 250V 0.16A 250V 3.15A 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 Mark...
Page 150: Ceiling Cassette-4Way Compact Type (Fdtc)
Color Marks LED 3 Indication lamp Red-Inspection Terminal block Power source Mark Color CNB Z Connector Drain motor LM1 4 Louver motor mark BK Black F200 203 Fuse Remote controller communication Terminal block Signal line mark Blue address Fan motor Thermistor Remote controller BR Brown Float switch...
Page 151: Ceiling Suspended Type (Fden)
Th -R1 Th -R2 Th -R3 Th -A Capacitor for FMI CFI 1 CNB Z Connector Fuse 220 240V Fan motor with thermostat FMI 1 Connecting line between Indication lamp Green-Normal operation LED 2 Option 1 2 3 4 5 CNW1 CNW2 indoor unit and outdoor unit...
Page 152: Duct Connected Low/Middle Static Pressure Type (Fdum)
CNB~Z Connector Drain motor Fuse F1~3 Fan motor (with thermostat) Float switch Remote controller Control PCB Reactor Th -R1 t° Indication lamp (Green-Normal operation) LED · E2 t° Indication lamp (Red-Inspection) LED · E3 Th -R2 LED • E2 LED • E3 t°...
Page 153: Piping Systems
Cooling cycle Outdoor unit Heating cycle Sensor Service valve (Tho-A) (Gas) Gas line (φ9.52) (φ9.52) Indoor unit 4 way valve Check joint Muffler Sensor (Tho-D) Discharge Humidity Heat exchanger Sensor sensor (Th2 (Th3) Sensor (Tho-S) Suction Sensor Accumlator Accumlator (Th2 Capillary Compressor Sensor...
Page 154 Cooling cycle Outdoor Unit Heating cycle Service valve (Gas) Gas line ( 9.52 or 12.7) Sensor ( 9.52 or 12.7) (Tho-A) ( 9.52 or 12.7) 4way valve Humidity sensor Indoor Unit (Th3) Heat exchanger Sensor (Th2 Heat exchanger Sensor Muffler Sensor (Th2 (Tho-D)
Page 155 Cooling cycle Outdoor Unit Heating cycle Service valve (Gas) Gas line ( 9.52 or 12.7) Heat exchanger ( 9.52 or 12.7) Sensor (Tho-A) ( 9.52 or 12.7) 4way valve ( 9.52 or 12.7) Humidity sensor separator Capillary tube (Th3) Indoor Unit Sensor Sensor Sensor...
Page 156 Cooling cycle Outdoor Unit Heating cycle Service valve (Gas) Gas line (φ9.52 or φ12.7 or φ15.88) Heat exchanger Thermistor (φ9.52 or φ12.7 or φ15.88) ( Tho-A ) (φ9.52 or φ12.7 or φ15.88) Muffler (φ9.52 or φ12.7 or φ15.88) (φ9.52 or φ12.7 4way valve or φ15.88) Hige preeure...
Page 157 Cooling cycle Outdoor Unit Heating cycle Service valve (Gas) (φ9.52 or φ12.7 or φ15.88) Gas line Heat exchanger (φ9.52 or φ12.7 or φ15.88) Thermistor (φ9.52 or φ12.7 or φ15.88) ( Tho-A ) (φ9.52 or φ12.7 or φ15.88) Muffler (φ9.52 or φ12.7 or φ15.88) 4way valve (φ9.52 or φ12.7 Hige preeure...
Page 158: 5. Installation Manual
'11 • SCM-SM-110 5. INSTALLATION MANUAL 5.1 Outdoor units RPC012A915A (1) Models SCM40ZJ-S, 45ZJ-S INSTALLATION MANUAL FOR OUTDOOR UNIT MULTI TYPE AIR CONDITIONER R410A REFRIGERANT USED • This installation manual deals with outdoor units and general installation specifications only. For indoor units, refer to the respective installation manuals supplied with the units.
Page 159: Selection Of Installation Location
'11 • SCM-SM-110 ONER he units. CAUTION • Do not install the outdoor unit in the locations listed handled. • Do not use any materials other than a fuse with the below. Corrosive gas can cause corrosion of heat exchanger, correct rating in the location where fuses are to be •...
Page 160: Installation Of Outdoor Unit
'11 • SCM-SM-110 INSTALLATION OF OUTDOOR UNIT Drainage There are 2 holes in the bottom panel of the outdoor unit to drain condensation. Install the outdoor unit so it will be horizontal. Also, secure the legs of the unit to a firm foundation to prevent any instabilities. Secure it firmly so the unit will not fall during earthquakes and from sudden gusts of wind.
Page 161: Earthing Work
'11 • SCM-SM-110 4 AIR PURGING NOTE : Fully open the operation valves (on both liquid and gas sides) after completing air purging. Since the system uses service ports differing in diameter from those found Please use an anti-reverse flow type vacuum pump adapter so as to prevent on the conventional models, a charge hose (for R22) presently in use is not vacuum pump oil from running back into the system.
Page 162: Models Scm50Zj-S1, 60Zj-S1
'11 • SCM-SM-110 RPC012A916C INSTALLATION MANUAL FOR OUTDOOR UNIT • (2) Models SCM50ZJ-S1, 60ZJ-S1 MULTI TYPE AIR CONDITIONER R410A REFRIGERANT USED • This installation manual deals with outdoor units and general installation specifications only. For indoor units, refer to the respective installation manuals supplied with the units. page 173 to 208.
Page 163 '11 • SCM-SM-110 CAUTION • Do not install the outdoor unit in the locations listed handled. • Do not use any materials other than a fuse with the ONER below. correct rating in the location where fuses are to be Corrosive gas can cause corrosion of heat exchanger, •...
Page 164 '11 • SCM-SM-110 INSTALLATION OF OUTDOOR UNIT Drainage There are 2 holes in the bottom panel of the outdoor unit to drain condensation. Install the outdoor unit so it will be horizontal. Also, secure the legs of the unit to a firm foundation to prevent any instabilities. Secure it firmly so the unit will not fall during earthquakes and from sudden gusts of wind.
Page 165 '11 • SCM-SM-110 4 AIR PURGING NOTE : Fully open the operation valves (on both liquid and gas sides) after completing air purging. Since the system uses service ports differing in diameter from those found Please use an anti-reverse flow type vacuum pump adapter so as to prevent on the conventional models, a charge hose (for R22) presently in use is not vacuum pump oil from running back into the system.
Page 166: Models Scm71Zj-S1, 80Zj-S1
'11 • SCM-SM-110 (3) Models SCM71ZJ-S1, 80ZJ-S1 refer to page173 to 208.
Page 167 '11 • SCM-SM-110...
Page 168 '11 • SCM-SM-110 φ φ φ φ φ φ φ φ φ φ φ φ φ...
Page 169 '11 • SCM-SM-110 ～ φ ～ φ ～...
Page 170: Models Scm100Zj-S1, 125Zj-S1
'11 • SCM-SM-110 (4) Models SCM100ZJ-S1, 125ZJ-S1 RPC012A918 RPC012A918 INSTALLATION MANUAL FOR OUTDOOR UNIT • MULTI TYPE AIR CONDITIONER R410A REFRIGERANT USED • This installation manual deals with outdoor units and general installation specifications only. For indoor units, refer to the respective installation manuals supplied with the units. •...
Page 171 '11 • SCM-SM-110 CAUTION • Do not install the outdoor unit in the locations listed handled. • Do not use any materials other than a fuse with the ONER below. Corrosive gas can cause corrosion of heat exchanger, correct rating in the location where fuses are to be USED •...
Page 172 '11 • SCM-SM-110 INSTALLATION OF OUTDOOR UNIT Drainage The screw of the service panel is tightened securely. Execute drain piping by using a drain elbow and drain grommets, where water drained from the outdoor unit is a problem. G rommet There are 3 drain holes provided on the bottom plate of an outdoor unit Terminal cover...
Page 173 '11 • SCM-SM-110 4 AIR PURGING NOTE : Fully open the operation valves (on both liquid and gas sides) after completing air purging. Please use an anti-reverse flow type vacuum pump adapter so as to prevent Since the system uses service ports differing in diameter from those found vacuum pump oil from running back into the system.
Page 174: Indoor Units
5.2 Indoor units RKY012A007B WARNING (1) Wall mounted tyde (SRK) • 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 175: Installation Of Indoor Unit
SELECTION OF INSTALLATION LOCATION BEFORE INSTALLATION (Install at location that meets the following conditions, after getting approval from the customer)  Before installation check that the power supply matches the air conditioner. Indoor unit 7.0 cm minimum from the ceiling ...
Page 176 Fixing of indoor unit Since this air conditioner has been designed to collect dew drops on the rear Gutter surface to the drain pan, do not attach the power cord above the gutter. Indoor unit  How to remove the indoor unit from the installation board Installation Steps Latch Wall...
Page 177: Electrical Wiring Work
ELECTRICAL WIRING WORK The screw of the service panel is tightened securely. Installing the air-cleaning filters 1. Open the air inlet panel and remove the air filters. Preparation of indoor unit CAUTION 2. Install the filter holders, with the air-cleaning filters installed in the holders. In case of faulty wiring connection, the indoor unit stops, and Service panel In the air conditioner.
Page 178: Installation Manual For Indoor Unit
(b) Models SRK25ZJR-S, 35ZJR-S RLA012A012B WALL TYPE AIR CONDITIONER R410A REFRIGERANT USED SRK20ZJ-S, 25ZJ-S, 35ZJ-S, 50ZJ-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 179 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 180 RLA012A012B Fixing of indoor unit Since this air conditioner has been designed to collect dew drops on the rear Gutter surface to the drain pan, do not attach the power cord above the gutter. • How to remove the indoor unit from the installation board Latch (2 locations) Installation Steps Wall...
Page 181 illustration, hold the panel at both ends of lower Tighten the 2 set screws. part, lower it downward slowly, then push it Fit the air filter. slightly until the latch works. Fit the air inlet panel. Set screws ELECTRICAL WIRING WORK Installing the air-cleaning filters The screws of the lid and the terminal cover are tightened securely.
Page 182 (c) Model SRK71ZK-S RKW012A400A WALL TYPE AIR CONDITIONER R410A REFRIGERANT USED 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 183 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 184 RKW012A400A Fixing of indoor unit Since this air conditioner has been designed to collect dew drops on the rear Gutter surface to the drain pan, do not attach the power cord above the gutter. • How to remove the indoor unit from the installation board Latch (2 locations) Installation Steps Wall...
Page 185 illustration, hold the panel at both ends of lower Tighten the screw (A) 2pcs / screw part, lower it downward slowly, then push it (B) 3pcs to fix the front panel. Front panel Screw (A) Screw (A) slightly until the latch works. Install the air filter.
Page 186: Floor Standing Type (Srf)
(2) Floor standing type (SRF) RFB012A002B WARNING Models SRF25, 35ZJX-S, 50ZJX-S1 CAUTION SAFETY PRECAUTIONS WARNING CAUTION WARNING CAUTION WARNING...
Page 187 SELECTION OF INSTALLATION LOCATION BEFORE INSTALLATION (Install at location that meets the following conditions, after getting approval from the customer) 7 cm minimum from the ceiling Before installation check that the power supply matches the air conditioner. Indoor unit Where there is no obstructions to the air flow and where the cooled and heated air can be evenly distributed. Installation board Standard accessories (Installation kit) Q'ty...
Page 188 CAUTION During the installation, do not lean on the control box or the display, as they may be damaged. Fixing of indoor unit Install the indoor unit on flat wall. If improperly installed, it may cause abnormal noise and vibration. (Distortion on the wall shall be no larger than 3 mm.) Floor installation Wall installation Secure using upper 2 screws for floor installations.
Page 189: Installation Of Remote Control
Concealed installation Installing the air-cleaning filters 1. Open the air inlet panel and remove the air filters. Install the indoor unit according to the following instructions. 2. Install the filter holders, with the air-cleaning filters installed in the holders. 1 Secure the upper, right, and left spaces according to the right figure. In the air conditioner.
Page 190: Ceiling Concealed Type (Srr)
(3) Ceiling concealod type (SRR) RJD012A201B FOR MODEL SRR SERIES R410A REFRIGERANT USED Models SRR25~60ZJ-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 191: 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 192 (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 Tapping screw...
Page 193 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 ( 9.52) : 33.0 ~ 42.0 N·m (3.3 ~ 4.2 kgf·m) (Do not turn) (Connection opening diameter ø16) ( 12.7) : 49.0 ~ 61.0 N·m (4.9 ~ 6.1 kgf·m)
Page 194: Ceiling Cassette-4Way Compact Type (Fdtc)
'11 • SCM-SM-110 (4) Ceiling cassette-4way compact type (FDTC) refer to page 157 to 172.
Page 195 '11 • SCM-SM-110 ① ③ Before installation Preparation before installation 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 Unit type/Power supply specification Pipes/Wires/Small parts ...
Page 196 '11 • SCM-SM-110 ④ Installation of indoor unit (continued) ⑥ Drain pipe (continued) ⑥ Drain 6. Make sure to install the indoor unit horizontally. Confirm the Work procedure Drain test levelness of the indoor unit with a level gauge or transparent Indoor unit 1.
Page 197 '11 • SCM-SM-110 ⑥ ⑧ Drain pipe (continued) Panel installation Drain test l After wiring work finished, install the panel on the indoor unit. l Refer to attached panel installation manual for details. f 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 198 '11 • SCM-SM-110 PJAO12D786...
Page 199 '11 • SCM-SM-110 Note : This function is not able to be set with wireless remote controls or simple remote control (RCH-H3). For setting the swing range of other louvers, return to 1 and proceed same procedure respectively.
Page 200: Ceiling Suspended Type (Fden)
'11 • SCM-SM-110 (5) Ceiling suspended type (FDEN) PFA012D621B This manual is for the installation of an indoor unit. CAUTION For electrical wiring work (Indoor), refer to the electrical wiring work installation manual. For remote controller installation, refer to the installation manual attached ●...
Page 201 '11 • SCM-SM-110 Before installation Preparation before installation (continued) Install correctly according to the installation manual. Pitch of suspension bolts and pipe position Location of pipe outlets Con rm the following points: Pitch of suspension bolts Top cover Drain line (left) Unit type/Power supply speci cation Pipes/Wires/Small parts...
Page 202 '11 • SCM-SM-110 Installation of indoor unit Refrigerant pipe (continued) Work procedure The pipe can be connected from three different directions. (back, reight, top) Paper pattern 1. Select the suspension bolt locations and the pipe hole location. When the pipe is routed through the back. (1) Use enclosed paper pattern as a reference, and If the bracket is removed, piping work will become easy.
Page 203 '11 • SCM-SM-110 Wiring-out position and wiring connection How to set the airﬂow direction Electrical installation work must be performed according to the installation It is possible to change the movable range of the louver on the air outlet from manual by an electrical installation service provider quali ed by a power the wired remote controller.
Page 204: Duct Connected Low/Middle Static Pressure Type (Fdum)
'11 • SCM-SM-110 (6) Duct connected Low/Middle static pressure type (FDUM) DUCT CONNECTED MIDDLE STATIC PRESSURE AIR CONDITIONING UNIT INSTALLATION MANUAL ○This mo blow typ This manual is for the installation of an indoor unit. CAUTION For electrical wiring work (Indoor), refer to the electrical wiring work installation manual. For remote ①B controller installation, refer to the installation manual attached to a remote controller.
Page 205 '11 • SCM-SM-110 ○This model is middle static ducted type air conditioning unit. Therefore, do not use this model for direct ③Preparation before installation blow type air conditioning unit. ●If suspension bolt becomes longer, do reinforcement of earthquake resistant. ①Before installation 　○For grid ceiling 　　When the suspension bolt length is over 500mm, or the gap between the ceiling and roof is ●Install correctly according to the installation manual.
Page 206 '11 • SCM-SM-110 ⑤Duct Work (continued) ⑤Duct Work ⑦D ① A corrugated board (for preventing sputtering) is attached to the main body of the air conditioner Connecting the air intake/vent ducts Caut (on the outlet port). Do not remove it until connecting the duct. ①Fresh Air Intake ●...
Page 207 '11 • SCM-SM-110 ⑦Drain pipe ⑦Drain pipe (continued) Caution Drain up ● Install the drain pipe according to the installation manual in order to drain properly. ● The position for drain pipe outlet can be raised up to 600mm above the ceiling. Use elbows Imperfection in draining may cause ﬂood indoors and wetting the household goods, etc.
Page 208 '11 • SCM-SM-110 ⑧Wiring-out position and wiring connection ⑨External static pressure setting (continued) ● Electrical installation work must be performed according to the installation manual by an Indoor unit fan will run automatically and recognize E.S.P. by itself. electrical installation service provider qualiﬁed by a power provider of the country, and be The operation for automatic E.S.P recognition will last about 6 minutes, and it will be stopped after recognition is completed.
Page 209: Replacement Procedure Of The Fan Unit (For Fdum Model)
'11 • SCM-SM-110 (7) Replacement procedure of the fan unit (For FDUM model) Notes(1) The unit is a heavy item. It must be supported securely and handled with care not to drop when it is necessary toreplace. Notes(2) For the maintenance space, to page 204. (a) Remove the control box and the side panel, and remove the screws marked in the circles (2 places) in the figure.
Page 210: Table Of Functions Connected Wired Remote Controllers (Rc-E4, E5)
'11 • SCM-SM-110 6 TABLE OF FUNCTIONS CONNECTED WIRED REMOTE CONTROLLERS (RC-E4, E5) If wired remote controller (optional part) is connected to the following indoor units, some of the functions cannot be used. Please see following table for details. ・Wall mounted type：SRK＊＊ZJX-S1,ZJX-S,ZJR-S,ZJ-S,ZK-S ・Floor standing type：SRF＊＊ZJX-S ・Ceiling concealed type：SRR＊＊ZJ-S ○：OK, △：Conditionally OK, ×：N/A...
Page 211 '11 • SCM-SM-110 Outline of function Remarks Functions Preparation of display of heating Display of preparative heating opration from indoor unit. Starting time of heating, thermo operation ○ ○ ○ opration 36 Display of defrost operation Display of defrost operation from indoor unit. ○...
Page 212 '11 • SCM-SM-110 7 COMPONENT REPLACEMENT 7.1 Models SCM71ZJ-S1, 80ZJ-S1 Fan and fan motor (FMo1) Screws (For front panel) Screws (For top panel) 1. Loosen 6 screws and remove the top panel. 2. Loosen 3 screws and remove the service panel. 3.
Page 213 '11 • SCM-SM-110 Fan and fan motor (FMo1) Clanps 7. Detach the clamps. 8. Pull out the cable. Nuts 9. Loose 4 nuts. 10. Remove the fan motor (FMo1). Compressor (CM) 1. Loosen screws and remove the service panel and top panel.
Page 214 '11 • SCM-SM-110 Compressor (CM) 4. Loosen screws and remove 〔Side panel〕 Screws the side panel. Screws Screws 〔Side view〕〔Rear view〕 5. Untie the string and remove rear and front insulation cover. 6. Disconnect the connector of crankcase heater. Rear cover Disconnect the connector of...
Page 215 '11 • SCM-SM-110 Compressor (CM) 7. Remove the top cover and the side jacket of compressor. Top cover Side jacket 8. Remove the crankcase heater. (It is available to remove the Crankcase heater 〔Front view〕 crankcase heater after removing the compressor) 9.
Page 216 '11 • SCM-SM-110 Compressor (CM) 10. Loosen a nut and remove Terminal cover the terminal cover. 11. Disconnect the faston connectors from compressor. U : Pink cable V : White cable W : Gray cable Note : Be sure to do above work after elapsing 3 minutes from power OFF.
Page 217 '11 • SCM-SM-110 Main PCB (upper layer) 〔Top view〕 1. Loosen the screws and remove the top panel and service panel. 2. Unlatch the cover and remove the cover of control box. 2 Latches on front side 2 more Latches on rear side 3.
Page 218 '11 • SCM-SM-110 Main PCB (upper layer) 5. Disconnect all connectors 〔Main PCB〕 on the main PCB side. ①Disconnect the faston connectors for power supply to compressor. U : Pink cable ⑥ V : White cable W : Gray cable ...
Page 219 '11 • SCM-SM-110 Main PCB (upper layer) Layout of Main PCB 〈Main PCB〉〔Part side〕 W : Gray V : White U : Pink CNFAN CNSUB R : Black S : White C-2 : Red Fuse CNTH CN20V S-2 : White 〔Pattern side〕...
Page 220: Front View
'11 • SCM-SM-110 Sub PCB (Lower layer) CNEEV2 ② CNTH ③ C N D ⑧ C N C ⑧ C N B ⑧ C N A ⑧ C N 20V ⑦ 1.After removing the Main PCB, disconnect all connectors on Sub PCB.
Page 221 '11 • SCM-SM-110 Sub PCB (Lower layer) 6. Loosen 4 screws and remove Sub PCB. Screws Screws 〔Part side〕 Layout of Sub PCB. CNTH CNEEV2 S-1 (WH) C-1 (RD) CN20V CNEEV1 CNHEAT SO (WH) Black cable Grounding cables White cable CNMAIN CN20S RO (BK)
Page 222 '11 • SCM-SM-110 EEV coils 1. Remove the faulty EEV coil and disconnect the connector. Note: 1) When disconnecting the connector, be sure to check the color marked on the top of coil and the color of the connector. GREEN BLUE WHITE 2) When replace to a new...
Page 223 '11 • SCM-SM-110 4-way valve coil 1. Disconnect the connector. 2. Loosen a screw and remove the coil. Connector Coil Screw...
Page 224 '11 • SCM-SM-110 7.2 Models SCM100ZJ-S1, 125ZJ-S1 Fan and fan motor (FMo1) Screws 1.Loosen 4 screws and remove the fan grille. Screws 2. Loosen the nut and remove the fan propeller. Grommet 3. Remove the service panel. 4. Detach the clamps and cut off the strap.
Page 225 '11 • SCM-SM-110 Fan and fan motor (FMo1) 7. Loosen 4 nuts. 8. Remove the fan motor (FMo1). Nuts Compressor (CM) 1. Loosen screws and remove the service panel and top panel. 2. Loosen screws and remove 〔After removed terminal cover〕 Cover Screws Terminal cover...
Page 226 '11 • SCM-SM-110 Compressor (CM) Side panel 4. Loosen screws and remove the side panel. Screws Screws 〔Side view〕〔Rear view〕 Top cover 5. Remove the top cover. Terminal cover 6. Remove the terminal cover. 7. Disconnect the faston connectors from compressor. U : Red cable V : White cable W : Blue cable...
Page 227 '11 • SCM-SM-110 Compressor (CM) 9. Remove the control unit for CNEEV4 CNFAN1 CNR1 CNN1 easy replacement work of 〔Before disconnecting connectors〕 compressor according to following procedure. 1) Disconnect all connectors shown in the photo. CNF(PK) (125 only) CNE(OR) CND(OR) CNCBL) CNEEV2 CNB(BR)
Page 228 '11 • SCM-SM-110 Compressor (CM) 〔Front view〕〔Side view〕〔Top view〕 11. Remove the partition for easy replacement work of compressor according to following procedure. 1) Loosen the screws (4 pieces) shown in the photo. 2) Disconnect the connector of CNFAN1 and pull out the cable for fan motor through the hole on the Screw...
Page 229 '11 • SCM-SM-110 Compressor (CM) 〔Front view〕〔Rear view〕 Crankcase heater 13. Loosen 3 nuts of compressor fixing bolts. 14. Remove the crankcase heater. Nut of compressor Nut of compressor fixing bolts fixing bolts 〔Side view〕 15. Disconnect the pipes for Discharge pipe suction and discharge by brazing.
Page 230 '11 • SCM-SM-110 Control PCB (PWB1) on the 1st layer Pull upward 2. Loosen a screw and Screw dismount the first layer by pulling upward. 3. Loosen a screw on the fixing Slide to right bracket for the capacitor and slide the capacitor to the right slightly in order to disconnect the connector 3 from the diode...
Page 231 '11 • SCM-SM-110 Control PCB (PWB1) on the 1st layer 〈Control PCB〉〔Part side〕 Layout of control PCB. CNEEV1 CNTH CNX1 CNI3 CNA1 CNP1 CNL1 CNS1 CNI1 CNFAN1 CNA2 CNR1 CNN1 〔Pattern side〕 Sub PCB (PWB4) on the 1st layer 1.
Page 232 '11 • SCM-SM-110 Sub PCB (PWB4) on the 1st layer 2. Disconnect the cables (Red & White) connected to the terminal TB3 & TB4 of N/F PCB (PWB3), after dismount the 1st layer as follows. Disconnect power cables 1) Dismount the 1st layer according to the dismounting procedure for control PCB after loosening 2 screws...
Page 233 '11 • SCM-SM-110 Inverter PCB (PWB2) on the 2nd layer 1. Dismount the 1st layer according to the procedure for control PCB (PWB1) and 2nd layer Sub PCB (PWB4). 2. Loosen 3 screws and disconnect the cables for compressor. Note: Be sure to do this work after elapsing 3 minutes from power OFF.
Page 234 '11 • SCM-SM-110 Noise filter PCB (PWB3) on the back side lower of the 1st layer PCB3 1. Dismount the 1st layer according to the procedure Locking support for control PCB (PWB1) and Sub PCB (PWB4). 2. Loosen 5 screws and disconnect the cables of TB3 - TB7.
Page 235 '11 • SCM-SM-110 EEV coils M A R K I N G 1. Remove the faulty EEV coil and disconnect the connector. EEVF (125 only) YELLOW Note: 1) When disconnecting the connector, be sure to EEVE check the color marked BLACK on the top of coil and the color of the connector.
Page 236 '11 • SCM-SM-110 8 CHECKING PROCEDURE 8.1 Models SCM71ZJ-S1, 80ZJ-S1 ＜Fan motor＞ CNFAN1 on PCB1 ④ ③ ② ① Output 280VDC ① 15VDC ② 0-6VDC ③ 0-5VDC ④ ＜Compressor＞ U:Pink W:Gray V:White Resistance 1.154Ω...
Page 237 '11 • SCM-SM-110 ＜EEV A ～ EEV D＞ MARKING EEVD GREEN EEVC BLUE EEVB EEVA WHITE Input : 12VDC 46Ω 46Ω 46Ω 46Ω...
Page 238 '11 • SCM-SM-110 ＜Sensor＞ Suction pipe Discharge pipe temp. sensor temp. sensor (Tho-S) (Tho-D) Heat exchanger sensor (Tho-R) Resistance(kΩ) Outdoor air Name Color temp. sensor 25℃ 90℃ (Tho-A) Tho-R Black Tho-A Black Tho-D Black Tho-S Black...
Page 239 '11 • SCM-SM-110 ＜Main PCB＞ W : Gray V : White U : Pink CNTH CNFAN CNSUB R : Black S : White C-2 : Red S-2 : White CN20V Fuse Connector Connected to Normal value Remark CNFAN Fan motor CNSUB(1-4) 13VDC CNSUB(2-4)
Page 240 '11 • SCM-SM-110 ＜SUB PCB＞ S-1 (WH) C-1 (RD) CNTH CN20V CNEEV2 Grounding cable CNMA1N to L-terminal CNEEV2 to N-terminal CNHEAT Grounding cable CN20S SO (WH) RO (BK) Grounding cable Connector Connected to Normal value Remark TB1(L) 220-240VAC Power supply TB1(N) 0VAC Power supply...
Page 241 '11 • SCM-SM-110 8.2 Models SCM100ZJ-S1, 125ZJ-S1 ＜Fan motor＞ CNFAN1 on PCB1 Output ① 280VDC ① 15VDC ② ② ③ ④ 0-6VDC ③ 0-5VDC ④ ＜EEVA - EEVF＞ MARKING Input : 12VDC EEVF (125 only) YELLOW 46Ω 46Ω EEVE 46Ω 46Ω...
Page 242 '11 • SCM-SM-110 Outdoor air ＜Thermistor＞ temp. thermistor (Tho-A) Heat exchanger thermistor (Tho-R) Power transistor Discharge pipe Suction pipe thermistor (Tho-AF) temp. thermistor (Tho-D) temp. thermistor (Tho-S) Resistance(kΩ) Name Color 0℃ 25℃ 50℃ 90℃ Tho-R Black 16.4 Tho-D Black 54.8 Tho-S Black 16.4...
Page 243 '11 • SCM-SM-110 ＜Control PCB:PCB1＞ CNEEV1 CNX1 CNI3 CNA1 CNTH CNP1 CNL1 CNS1 CNI1 CNFAN1 CNA2 CNR1 CNN1 Connector Connected to Normal value Remark Signal of SL CNX1 CNX2 on PCB4 1-3 DC18V CNI3 CNI4 on PCB2 2-3 DC15V CNA1 Power transistor 280VDC 220-240VAC...
Page 244 '11 • SCM-SM-110 ＜Inverter PCB:PCB2＞ CNI2 (RD) (BL) (RD) (BL) (RD) CNACT1 CNI4 (BL) Connector Connected to Normal value Remark P1-N1 Diode Module 280VDC P2-N2 Active filter module 280VDC P3-N3 Contactor 280VDC COMP ON 300VDC 1-2 5VDC CNI2 CNI1 on PCB1 1-3 0-5VDC 1-4 0-5VDC 1-3 18VDC...
Page 245 '11 • SCM-SM-110 ＜SUB PCB: PCB4＞ CNEEV4 (PK) ※2 CNEEV2 (OR) CNEEV3 (YE) CNEEV1 (BL) CNS2 (BR) CNX2 (RD) CNDRM CNTRO ※1 N, IN CNTRI L, IN Connector Connected to Normal value Remark EEV A(WH) and EEV B(RD) CNEEV1 EEV C(BL) and EEV D(GN) CNEEV2 EEV E(BL) CNEEV3...
Page 246 RESIDENTIAL AIR CONDITIONERS Air-Conditioning & Refrigeration Systems Headquarters 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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Mitsubishi SCM40ZJ-S Service Manual

1 Outline of Operation Control by Microcomputer

2 Maintenance Data

3 Electrical Wirings

4 Piping Systems

5 Installation Manual

6 Table of Functions Connected Wired Remote Controllers (Rc-E4, E5)

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