Mitsubishi Electric SLZ Series Technical & Service Manual
  1. Manuals
  2. Brands
  3. Mitsubishi Electric Manuals
  4. Air Conditioner
  5. SLZ Series
  6. Technical & service manual

Mitsubishi Electric SLZ Series Technical & Service Manual

Ceiling cassettes r410a
Hide thumbs Also See for SLZ Series:

Advertisement

Table of Contents

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
TECHNICAL & SERVICE MANUAL
Indoor unit
[Model Name]
SLZ-KF09NA
SLZ-KF12NA
SLZ-KF15NA
SLZ-KF18NA
Model name
indication
INDOOR UNIT
WIRELESS REMOTE
CONTROLLER
(Option)
[Service Ref.]
SLZ-KF09NA.TH
SLZ-KF12NA.TH
SLZ-KF15NA.TH
SLZ-KF18NA.TH
WIRED REMOTE CONTROLLER
(Option)
February 2019
No. OCH669
REVISED EDITION-A
Revision:
• Some descriptions have
EDITION-A.
OCH669 is void.
CONTENTS
1. REFERENCE MANUAL ...................... 2
2. SAFETY PRECAUTION ...................... 2
4. SPECIFICATIONS ............................... 9
6. WIRING DIAGRAM ............................ 13
8. TROUBLESHOOTING ....................... 15
9. SPECIAL FUNCTION ........................ 28
10. 4-WAY AIRFLOW SYSTEM ............... 30
PARTS CATALOG (OCB669)

Advertisement

Table of Contents
loading

Related Manuals for Mitsubishi Electric SLZ Series

Summary of Contents for Mitsubishi Electric SLZ Series

  • Page 1: Table Of Contents

    SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS February 2019 No. OCH669 REVISED EDITION-A TECHNICAL & SERVICE MANUAL Indoor unit [Model Name] [Service Ref.] Revision: • Some descriptions have SLZ-KF09NA.TH SLZ-KF09NA EDITION-A. OCH669 is void. SLZ-KF12NA.TH SLZ-KF12NA SLZ-KF15NA.TH SLZ-KF15NA SLZ-KF18NA.TH SLZ-KF18NA CONTENTS 1. REFERENCE MANUAL ...... 2 2.

  • Page 2: Reference Manual

    REFERENCE MANUAL OUTDOOR UNIT’S SERVICE MANUAL Service Ref. Service Manual No. MXZ-2C20NA2-U1 OBH702/OBB702 SAFETY PRECAUTION 2-1. ALWAYS OBSERVE FOR SAFETY Before obtaining access to terminal, all supply circuits must be disconnected. 2-2. CAUTIONS RELATED TO NEW REFRIGERANT Cautions for units utilizing refrigerant R410A Use a vacuum pump with a reverse flow check Use new refrigerant pipes.
  • Page 3 [1] Cautions for service (1) Perform service after recovering the refrigerant left in unit completely. (2) Do not release refrigerant in the air. (3) After completing service, charge the system with specified amount of refrigerant. [2] Additional refrigerant charge When charging directly from cylinder ·...

  • Page 4: Parts Names And Functions

    PARTS NAMES AND FUNCTIONS 3-1. INDOOR UNIT Filter Removes dust and pollutants Horizontal Air Outlet from drawn in air. Sets horizontal airflow automatically during cooling or dehumidifying. Grille Auto Air Swing Vane Disperses airflow up and down and adjusts the angle of airflow direction.
  • Page 5 3-2. WIRELESS REMOTE CONTROLLER (Option) Transmission area Not available Remote controller display Battery replacement indicator Set Temperature buttons OFF/ON button Mode button (Changes operation mode) Fan Speed button (Changes fan speed) i-see button Timer ON button Menu button Timer OFF button SET/SEND button Weekly timer ON/OFF button CANCEL button...
  • Page 6 3-3. Wired remote controller (Option) PAR-33MAA The functions which can be used are restricted according to each model. The main display can be displayed in 2 different modes: "Full" and "Basic." Display The initial setting is "Full." 1 Operation mode Indoor unit operation mode appears here.
  • Page 7 Menu structure Press the button. MENU Main menu Move the cursor to the desired item with the buttons, and press the SELECT button. Vane · Louver · Vent. (Lossnay) High power Timer ON/OFF timer Auto-OFF timer Weekly timer OU silent mode Restriction Temp.
  • Page 8 Main menu list Setting and display items Setting details Vane · Louver · Vent. Use to set the vane angle. (Lossnay) • Select a desired vane setting from 5 different settings. Use to turn ON/OFF the louver. • Select a desired setting from "ON" and "OFF." Use to set the amount of ventilation.

  • Page 9: Specifications

    Setting and display items Setting details Service Test run Select "Test run" from the Service menu to bring up the Test run menu. • Test run • Drain pump test run Input maintenance Select "Input maintenance Info." from the Service menu to bring up the Maintenance information screen. The following settings can be made from the Maintenance Information screen.
  • Page 10 NOISE CRITERION CURVES <60Hz> <60Hz> SLZ-KF09NA.TH SLZ-KF12NA.TH SPL(dB) LINE SPL(dB) LINE NOTCH NOTCH High High Medium Medium NC-70 NC-70 NC-60 NC-60 NC-50 NC-50 NC-40 NC-40 NC-30 NC-30 APPROXIMATE APPROXIMATE THRESHOLD OF THRESHOLD OF HEARING FOR HEARING FOR NC-20 NC-20 CONTINUOUS CONTINUOUS NOISE NOISE...

  • Page 11: Outlines And Dimensions

    OUTLINES AND DIMENSIONS SLZ-KF09NA.TH    SLZ-KF12NA.TH    SLZ-KF15NA.TH    SLZ-KF18NA.TH Unit: inch (mm) OCH669A...
  • Page 12 WIRED REMOTE CONTROLLER WIRELESS REMOTE CONTROLLER Unit: inch (mm) PAR-SL100A-E PAR-33MAA 3/4 (19) 2-5/8 (66) 4-3/4 (120) 1-13/16 (46) 2-9/16 (64.7) OCH669A...

  • Page 13: Wiring Diagram

    WIRING DIAGRAM SLZ-KF09NA.TH    SLZ-KF12NA.TH    SLZ-KF15NA.TH    SLZ-KF18NA.TH OUTDOOR UNIT See fig.1 CN32 CN3C CN01 (WH) (BU) (BK) 1 2 3 4 5 6 1 2 3 4 5 J42 J41 (WH) LED1 OFF ON CN51 CN5Y (WH) (WH) CN41 (WH) CN2L LED2 CN22 (RD) LED3 (BU) CN90...

  • Page 14: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM SLZ-KF09NA.TH    SLZ-KF12NA.TH    SLZ-KF15NA.TH    SLZ-KF18NA.TH Strainer Heat exchanger Refrigerant GAS pipe connection (Flare) Condenser/evaporator temperature thermistor (TH5) Refrigerant flow in cooling Refrigerant flow in heating Refrigerant LIQUID pipe connection (Flare) Pipe temperature thermistor/liquid Room temperature (TH2) thermistor (TH1) Strainer Distributor with strainer Unit: inch(mm) SLZ-KF09/12NA.TH SLZ-KF15/18NA.TH Gas pipe...

  • Page 15: Troubleshooting

    TROUBLESHOOTING 8-1. TROUBLESHOOTING <Check code displayed by self-diagnosis and actions to be taken for service (summary)> Present and past check codes are logged, and they can be displayed on the wired remote controller or controller board of out- door unit. Actions to be taken for service, which depends on whether or not the trouble is reoccurring in the field, are summa- Unit conditions at service Check code Actions to be taken for service (summary)
  • Page 16 Refer to the following tables for details on the check codes. [Output pattern A] Beeper sounds Beep Beep Beep Beep Beep Beep Beep 1 st 2 nd 3 rd n th 1 st 2 nd OPERATION · · · Repeated INDICATOR lamp blinking pattern...
  • Page 17 • If the unit cannot be operated properly after the test run, refer to the following table to find out the cause. Symptom Cause Wired remote controller •For about 3 minutes after power-on, operation of the PLEASE WAIT For about 3 minutes after power-on remote controller is not possible due to system startup.
  • Page 18 Note: Errors to be detected in outdoor unit, such as codes starting with F, U or E (excluding E0 to E7), are not covered in this document. Please refer to the outdoor unit's service manual 8-3. SELF-DIAGNOSIS ACTION TABLE for the details. Check code Abnormal point and detection method Countermeasure...
  • Page 19 *1: only P-series outdoor unit Check code Abnormal point and detection method Countermeasure Cause 12 Check if drain pump works. Drain pump lock protection operation 1 Malfunction of drain pump 1 Suspected abnormality, if drain pump 2 Clogged drain pump Check if connector (CNP) is connected. stops for 5 seconds continuously with Disconnected drain pump Turn the emergency operation switch (SWE)
  • Page 20 *1: only P-series outdoor unit Abnormal point and detection method Countermeasure Check code Cause Pipe temperature thermistor/Condenser / Evaporator (TH5) 1 Defective thermistor 1– Check resistance value of thermistor. 1 The unit is in 3-minute resume protec- tion mode if short/open of thermistor is characteristics For characteristics, refer to (P1) above.
  • Page 21 Abnormal point and detection method Countermeasure Check code Cause Remote controller transmission error(E3)/ signal receiving error(E5) 1 2 remote controllers are set as 1 Set a remote controller to main, and the other 1 Abnormal if remote controller could not “main.”...
  • Page 22 Check code Abnormal point and detection method Countermeasure Cause Forced compressor stop (due to water leakage abnormality) 1 The unit has a water leakage abnormality 1 Drain pump trouble 1 Check the drain pump. 2 Drain defective when the following conditions, a) and b), 2 Check whether water can be drained.
  • Page 23 8-4. TROUBLESHOOTING OF PROBLEMS Note: Refer to the manual of outdoor unit for the detail of remote controller. *1: only P-series outdoor unit Phenomena Cause Countermeasure (1) LED2 on indoor controller board • When LED1 on indoor controller board is also off. 1 Power supply of rated voltage is not supplied to out- is off.
  • Page 24 8-5. TEST POINT DIAGRAM 8-5-1. Indoor controller board SLZ-KF09NA.TH    SLZ-KF12NA.TH    SLZ-KF15NA.TH    SLZ-KF18NA.TH CN22 CN5Y Connect to the terminal block (TB5) i-see Sensor motor (MT) (Remote controller transmission line) CN90 Model selection Connect to the wireless J41, J42 remote controller board (CNB) Jumper wire (Pair No.
  • Page 25 8-6. FUNCTION OF DIP SWITCH Each function is controlled by the DIP switch on the indoor controller board. Model setting and capacity setting are preset in the nonvolatile memory of the indoor controller board. The black square ( ) indicates a switch position. Switch Setting by the DIP switch and jumper wire Remarks...
  • Page 26 8-7. TROUBLESHOOTING OF MAIN PARTS SLZ-KF09NA.TH    SLZ-KF12NA.TH    SLZ-KF15NA.TH    SLZ-KF18NA.TH Parts name Check method and criterion Room temperature Measure the resistance with a tester. thermistor (TH1) (Parts temperature 50 to 86°F) Pipe temperature Normal thermistor/liquid (TH2) 4.3 to 9.6 k" Condenser/evaporator temperature thermistor (TH5) (Refer to "8-7-1.
  • Page 27 8-7-1. Thermistor Characteristic Graph <Thermistor characteristic graph> < Thermistor for lower temperature > Room temperature thermistor(TH1) Thermistor for Pipe temperature thermistor/liquid(TH2) lower temperature Condenser/evaporator temperature thermistor(TH5) Thermistor R =15 k" ± 3% Fixed number of B=3480 ± 2% T-32 273+ 15.8 k"...

  • Page 28: Special Function

    SPECIAL FUNCTION BACK-UP HEATING FUNCTION 9-1. Operation The back-up heater turns ON when both of the following conditions have been satisfied: A) When the room temperature has not risen after the heater ON delay time has passed. Note: The heater ON delay time starts when the condition of “set temperature room temperature >...
  • Page 29 9-4. How to send the Request code PAR-3xMAA ("x" represents 0 or later) Press the button. Main Main menu Maintenance Initial setting Select "Service" with the [Cursor] buttons ( ) or the [Page] buttons ( Service ), and press the button.

  • Page 30: Way Airflow System

    4-WAY AIRFLOW SYSTEM 10-1. FRESH AIR INTAKE (LOCATION FOR INSTALLATION) At the time of installation, use the duct holes (cut out) located at the positions shown in following diagram, as and when required. Fresh air intake Detail drawing of fresh air intake (Unit: inch) 5-17/32 Burring hole...
  • Page 31 10-4. FIXING HORIZONTAL VANE Setting procedure 1) Turn off the main power supply (Turn off the breaker). 2) Remove the vane motor connector in the direction of the arrow shown below with pressing the unlocking button as in the figure below. Insulate the disconnected connector with the plastic tape.

  • Page 32: Disassembly Procedure

    DISASSEMBLY PROCEDURE SLZ-KF09NA.TH    SLZ-KF12NA.TH    SLZ-KF15NA.TH    SLZ-KF18NA.TH Be careful when removing heavy parts. OPERATING PROCEDURE PHOTOS/FIGURES Figure 1 1. Removing the air intake grille and air filter Grille hook (1) Slide the knob of air intake grille to the direction of the arrow 1 to open the air intake grille. Air intake grille (2) Remove the grille hook from the panel to prevent the grille from dropping.
  • Page 33 OPERATING PROCEDURE PHOTOS/FIGURES 3. Removing the electrical parts Photo 4 (1) Loosen the 2 screws on the control box cover. Control box cover (2) Slide the control box cover as indicated by the arrow to remove. <Electrical parts in the control box> •...
  • Page 34 OPERATING PROCEDURE PHOTOS/FIGURES Photo 8 6. Removing the pipe temperature thermistor/liquid (TH2) Fan motor and pipe temperature thermistor/gas (TH5) Pipe temperature Band cable thermistor/gas (TH5) (1) Remove the panel. (Refer to procedure 2) (2) Remove the room temperature thermistor (TH1). (Refer to procedure 4) (3) Remove the drain pan.
  • Page 35 OPERATING PROCEDURE PHOTOS/FIGURES 8. Removing the drain pump (DP) and float switch (FS) Photo 11 (1) Remove the panel. (Refer to procedure 2) Clamp (2) Remove the room temperature thermistor (TH1). (Refer Screw to procedure 4) Inner cover (3) Remove the control box cover. (Refer to procedure 3) (4) Remove the drain pan.
  • Page 36 HEAD OFFICE : TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN Copyright 2018 MITSUBISHI ELECTRIC CORPORATION Published: Sep. 2018 No. OCH669 Specifications are subject to change without notice. Made in Japan...

This manual is also suitable for:

Slz-kf09naSlz-kf12naSlz-kf15naSlz-kf18naSlz-kf09na.thSlz-kf12na.th ... Show all

Table of Contents