Mitsubishi Electric SLZ-KF25VA2 Technical & Service Manual

Split-type, heat pump air conditioners

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Operation manual (46 pages)

Operation manual (35 pages)

Operation manual (46 pages)

Summary of Contents for Mitsubishi Electric SLZ-KF25VA2

Page 1: Table Of Contents
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS March 2016 No. OCH616 TECHNICAL & SERVICE MANUAL Indoor unit Note: [Model Name] [Service Ref.] • This manual describes service SLZ-KF25VA2.TH data of the indoor units only. SLZ-KF25VA2 SLZ-KF25VA2.TH-ER SLZ-KF35VA2.TH SLZ-KF35VA2 SLZ-KF35VA2.TH-ER SLZ-KF50VA2.TH SLZ-KF50VA2 SLZ-KF50VA2.TH-ER SLZ-KF60VA2.TH...
Page 2: Reference Manual
REFERENCE MANUAL OUTDOOR UNIT’S SERVICE MANUAL Service Ref. Service Manual No. OCH603/OCB603 SUZ-KA25/35/50/60VA5.TH(-ER) 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 utilising 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 cycle with specified amount of refrigerant. (4) When performing service, install a filter drier simultaneously. Be sure to use a filter drier for new refrigerant.
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: Wireless Remote Controller
3-2. WIRELESS REMOTE CONTROLLER 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) Airflow button (Changes up/down airflow direction) i-see button Timer ON button Menu button Timer OFF button SET/SEND button...
Page 6: Basic Mode
3-3. Wired remote controller (Option) PAR-32MAA 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 Appears when the On/Off timer or Night setback 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 button. SELECT Vane · Louver · Vent. (Lossnay) High power Timer ON/OFF timer Auto-OFF timer Weekly timer Restriction Temp. range Operation lock Energy saving Auto return...
Page 8 Main menu list Setting and display items Setting details Vane · Louver · Vent. Use to set the vane angle. • Select a desired vane setting from 5 different settings. (Lossnay) 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
SPECIFICATIONS Indoor unit service ref. SLZ-KF25VA2.TH SLZ-KF35VA2.TH SLZ-KF50VA2.TH SLZ-KF60VA2.TH SLZ-KF25VA2.TH-ER SLZ-KF35VA2.TH-ER SLZ-KF50VA2.TH-ER SLZ-KF60VA2.TH-ER Mode Cooling Heating Cooling Heating Cooling Heating Cooling Heating Power supply (phase, cycle, voltage) Single phase 50 Hz, 230 V Input [kW] 0.02 0.02 0.02 0.02 0.03 0.03...
Page 10 NOISE CRITERION CURVES <50Hz> <50Hz> SLZ-KF25VA2.TH SLZ-KF35VA2.TH NOTCH SPL(dB) LINE NOTCH SPL(dB) LINE High High SLZ-KF25VA2.TH-ER SLZ-KF35VA2.TH-ER 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...
Page 11: Outlines And Dimensions
OUTLINES AND DIMENSIONS SLZ-KF25VA2.TH SLZ-KF35VA2.TH SLZ-KF50VA2.TH SLZ-KF60VA2.TH SLZ-KF25VA2.TH-ER SLZ-KF35VA2.TH-ER SLZ-KF50VA2.TH-ER SLZ-KF60VA2.TH-ER Unit: mm OCH616 11 11...
Page 12 WIRED REMOTE CONTROLLER WIRELESS REMOTE CONTROLLER Unit: mm PAR-SL100A-E PAR-32MAA 64.7 OCH616...
Page 13: Wiring Diagram
WIRING DIAGRAM SLZ-KF25VA2.TH SLZ-KF35VA2.TH SLZ-KF50VA2.TH SLZ-KF60VA2.TH SLZ-KF25VA2.TH-ER SLZ-KF35VA2.TH-ER SLZ-KF50VA2.TH-ER SLZ-KF60VA2.TH-ER OUTDOOR UNIT See fig.1 CN32 CN3C CN01 (WH) (BU) (BK) 1 2 3 4 5 J42 J41 (WH) LED1 OFF ON CN51 CN5Y (WH) (WH) CN41 (WH) CN2L LED2 CN22...
Page 14: Refrigerant System Diagram
REFRIGERANT SYSTEM DIAGRAM SLZ-KF25VA2.TH SLZ-KF35VA2.TH SLZ-KF50VA2.TH SLZ-KF60VA2.TH SLZ-KF25VA2.TH-ER SLZ-KF35VA2.TH-ER SLZ-KF50VA2.TH-ER SLZ-KF60VA2.TH-ER 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...
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- rized in the table below.
Page 16: High
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 2 minutes after power-on,operation of the For about 2 minutes after power-on PLEASE WAIT remote controller is not possible due to system start-up.
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 Check code Abnormal point and detection method Countermeasure Cause Freezing/overheating protection is (Cooling or drying mode) (Cooling or drying mode) operating 1 Clogged filter (reduced airflow) 1 Check clogging of the filter. Freezing protection (Cooling mode) Short cycle of air path Remove blockage.
Page 20: High
Abnormal point and detection method Countermeasure Check code Cause Pipe temperature thermistor/Condenser /Evaporator (TH5) 1 The unit is in 3-minute resume protec- 1 Defective thermistor 1– Check resistance value of thermistor. tion mode if short/open of thermistor is characteristics For characteristics, refer to (P1) above. detected.
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 1 Abnormal if remote controller could not other to sub. “main.”...
Page 22 Check code Abnormal point and detection method Countermeasure Cause Forced compressor stop (due to water leakage abnormality) 1 When the intake temperature subtracted 1 Drain pump trouble 1 Check the drain pump. from liquid pipe temperature is less than −10°C, drain sensor detects whether it is 2 Drain defective 2 Please 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. Phenomena Cause Countermeasure (1) LED2 on indoor controller board • When LED1 on indoor controller board is also off. 1 Check the voltage of outdoor power 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-KF25VA2.TH SLZ-KF35VA2.TH SLZ-KF50VA2.TH SLZ-KF60VA2.TH SLZ-KF25VA2.TH-ER SLZ-KF35VA2.TH-ER SLZ-KF50VA2.TH-ER SLZ-KF60VA2.TH-ER CN22 CN5Y Connect to the terminal block (TB5) i-See sensor motor (MT) Vane motor (MV) (Remote controller transmission line) 12 V pulse output 12 V pulse output 10.4–14.6 V DC...
Page 25 ) indicates a switch position. Switch Setting by the DIP switch Remarks Functions Model Setting 1 2 3 4 5 SLZ-KF25VA2 1 2 3 4 5 SLZ-KF35VA2 Capacity setting 1 2 3 4 5 SLZ-KF50VA2 1 2 3 4 5...
Page 26 8-7. TROUBLE CRITERION OF MAIN PARTS SLZ-KF25VA2.TH SLZ-KF35VA2.TH SLZ-KF50VA2.TH SLZ-KF60VA2.TH SLZ-KF25VA2.TH-ER SLZ-KF35VA2.TH-ER SLZ-KF50VA2.TH-ER SLZ-KF60VA2.TH-ER Parts name Check method and criterion Room temperature Measure the resistance with a tester. thermistor (TH1) (Parts temperature 10 to 30°C) Pipe temperature Abnormal Normal thermistor/liquid (TH2) Opened or short-circuited 4.3 to 9.6 k"...
Page 27 8-7-1. Thermistor Characteristic Graph < Thermistor for lower temperature > •Room temperature thermistor (TH1) •Pipe temperature thermistor/liquid (TH2) Thermistor for lower temperature •Condenser/evaporator temperature thermistor (TH5) Thermistor R =15 kΩ ± 3% Fixed number of B=3480 ± 2% Rt=15exp { 3480( 273+t 0˚C 15 kΩ...
Page 28: Way Air Flow System
Detail drawing of fresh air intake Burring hole Cut out hole 120° Ceiling surface Drain pipe Refrigerant pipe Electrical Box 9-2. FRESH AIR INTAKE AMOUNT & STATIC PRESSURE CHARACTERISTICS SLZ-KF25VA2.TH SLZ-KF35VA2.TH SLZ-KF50VA2.TH SLZ-KF60VA2.TH SLZ-KF25VA2.TH-ER SLZ-KF35VA2.TH-ER SLZ-KF50VA2.TH-ER SLZ-KF60VA2.TH-ER Taking air into the unit How to read curves Q …...
Page 29 9-4. FIxING HORIZONTAL VANE Horizontal vane of each air outlet can be fixed according to the environment where it is installed. Setting procedure 1) Turn off a main power supply (Turn off a 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.
Page 30: Disassembly Procedure
DISASSEMBLY PROCEDURE SLZ-KF25VA2.TH SLZ-KF35VA2.TH SLZ-KF50VA2.TH SLZ-KF60VA2.TH SLZ-KF25VA2.TH-ER SLZ-KF35VA2.TH-ER SLZ-KF50VA2.TH-ER SLZ-KF60VA2.TH-ER Be careful when removing heavy parts. OPERATING PROCEDURE PHOTOS & ILLUSTRATIONS Figure 1 1. Removing the air intake grille and air filter (1) Slide the knob of air intake grille to the direction of the arrow...
Page 31 OPERATING PROCEDURE PHOTOS 3. Removing the electrical parts Control box cover Photo 4 (1) Loosen the 2 screws on the control box cover. (2) Slide the control box cover as indicated by the arrow to remove. <Electrical parts in the control box> •...
Page 32 OPERATING PROCEDURE PHOTOS 6. Removing the pipe temperature thermistor/liquid (TH2) Photo 8 Pipe temperature Fan motor and pipe temperature thermistor/gas (TH5) thermistor/gas (TH5) Band cable (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 33 OPERATING PROCEDURE PHOTOS 8. Removing the drain pump (DP) and float switch (FS) Photo 11 Clamp (1) Remove the panel. (Refer to procedure 2) (2) Remove the room temperature thermistor (TH1). (Refer to Screw Inner cover procedure 4) (3) Remove the control box cover. (Refer to procedure 3) (4) Remove the drain pan.
Page 34 HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN Copyright 2016 MITSUBISHI ELECTRIC CORPORATION New publication, effective Mar. 2016 Distributed in Mar. 2016 No. OCH616 Specifications are subject to change without notice. Made in Japan...

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Mitsubishi Electric SLZ-KF25VA2 Technical & Service Manual

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