Mitsubishi Electric Mr.SLIM SLZ-KA25VA Technical & Service Manual
Ceiling cassettes split-type, heat pump air conditioners
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Also See for Mr.SLIM SLZ-KA25VA:
- Operation manual (19 pages) ,
- Brochure & specs (3 pages) ,
- Manual (118 pages)
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Table of Contents
- 1 Table of Contents
- 2 Technical Changes
- 3 Part Names and Functions
- 4 Wired Remote Controller
- 5 Specifications
- 6 Noise Criterion Curves
- 7 Outlines and Dimensions
- 8 Wiring Diagram
- 9 Refrigerant System Diagram
- 10 Troubleshooting
- 11 Way Air Flow System
- 12 Disassembly Procedure
- 13 Parts List
- 14 Rohs PARTS LIST
- Download this manual
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
TECHNICAL & SERVICE MANUAL
Indoor unit
[Model names]
SLZ-KA25VA
SLZ-KA35VA
SLZ-KA50VA
SLZ-KA25VAL
SLZ-KA35VAL
SLZ-KA50VAL
Model name
indication
INDOOR UNIT
ON/OFF
TOO
TOO
WARM
COOL
FAN
SELECT
AUTO COOL
HEAT
DRY
VANE
TIME
MODE
RESET
SLZ-KA25,35,50VAL.TH
SLZ-KA25,35,50VAL
.TH
1
REMOTE CONTROLLER
[Service Ref.]
SLZ-KA25VA.TH
SLZ-KA25VA
1
SLZ-KA35VA.TH
SLZ-KA35VA
1
SLZ-KA50VA.TH
SLZ-KA50VA
1
SLZ-KA25VAL.TH
SLZ-KA25VAL
SLZ-KA35VAL.TH
SLZ-KA35VAL
SLZ-KA50VAL.TH
SLZ-KA50VAL
TEMP.
ON/OFF
SLZ-KA25,35,50VA.TH
SLZ-KA25,35,50VA
.TH
1
.TH
.TH
.TH
.TH
1
.TH
1
.TH
1
CONTENTS
1. TECHNICAL CHANGES ······················2
2. PART NAMES AND FUNCTIONS ·······3
3. SPECIFICATIONS ································6
4. OUTLINES AND DIMENSIONS ···········8
5. WIRING DIAGRAM ····························11
6. REFRIGERANT SYSTEM DIAGRAM······12
7. TROUBLESHOOTING ·······················13
8. 4-WAY AIR FLOW SYSTEM ··············25
9. DISASSEMBLY PROCEDURE ··········27
10. PARTS LIST ·······································30
11. RoHS PARTS LIST ····························34
July 2007
No. OC320
REVISED EDITION-B
Revision:
• SLZ-KA25/35/50VA(L)
.TH
1
are added in REVISED
EDITION-B.
• Some descriptions have
been modified.
•Please void OC320 REVISED
EDITION-A.
Note:
• This manual describes only
service data of the indoor
units. When servicing out-
door units, please refer to
the service manual
No.OC322 or OC323
together with this manual.
• RoHS compliant products
have <G> mark on the spec
name plate.
• For servicing RoHS
compliant products, refer
to the RoHS Parts List.
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Table of Contents
Troubleshooting
Related Manuals for Mitsubishi Electric Mr.SLIM SLZ-KA25VA
Summary of Contents for Mitsubishi Electric Mr.SLIM SLZ-KA25VA
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Page 1: Table Of Contents
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS July 2007 No. OC320 REVISED EDITION-B TECHNICAL & SERVICE MANUAL Revision: • SLZ-KA25/35/50VA(L) are added in REVISED EDITION-B. Indoor unit • Some descriptions have [Model names] [Service Ref.] been modified. SLZ-KA25VA.TH SLZ-KA25VA •Please void OC320 REVISED SLZ-KA25VA EDITION-A. -
Page 2: Technical Changes
TECHNICAL CHANGES SLZ-KA25VAL.TH SLZ-KA25VAL SLZ-KA35VAL.TH SLZ-KA35VAL SLZ-KA50VAL.TH SLZ-KA50VAL SLZ-KA25VA.TH SLZ-KA25VA SLZ-KA35VA.TH SLZ-KA35VA SLZ-KA50VA.TH SLZ-KA50VA • PANEL has been changed. SLP-2AL SLP-2ALW SLP-2AA SLP-2AAW (White : 0.70Y 8.59/0.97) (Pure white : 6.4Y 8.9/0.4) -
Page 3: Part Names And Functions
PART NAMES AND FUNCTIONS Indoor Unit SLZ-KA25VAL.TH SLZ-KA25VA.TH SLZ-KA25VAL SLZ-KA25VA SLZ-KA35VAL.TH SLZ-KA35VA.TH SLZ-KA35VAL SLZ-KA35VA SLZ-KA50VAL.TH SLZ-KA50VA.TH SLZ-KA50VAL SLZ-KA50VA Filter Removes dust and pollutants from inhaled air. Horizontal Air Outlet 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 4: Wired Remote Controller
Wired remote controller Once the controllers are set, the same operation mode can be repeated by simply pressing the ON/OFF button. SLZ-KA25VA.TH SLZ-KA25VA SLZ-KA35VA.TH SLZ-KA35VA SLZ-KA50VA.TH SLZ-KA50VA ON/OFF button Temperature setting buttons Down Fan Speed button Timer Menu button (Monitor/Set button) Filter button (<Enter>... - Page 5 Wired remote controller Display Section Day-of-Week “Sensor” indication For purposes of this explanation, Shows the current day of the week. Displayed when the remote controller all parts of the display are shown sensor is used. as lit. During actual operation, only the relevant items will be lit.
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Page 6: Specifications
SPECIFICATIONS SLZ-KA35VAL SLZ-KA25VAL SLZ-KA50VAL Indoor service ref. SLZ-KA25VA SLZ-KA35VA SLZ-KA50VA Function Cooling Cooling Heating Heating Cooling Heating Single phase Single phase Single phase Power supply 230V, 50Hz 230V, 50Hz 230V, 50Hz Capacity Air flow (High/Medium/Low) K /h 600/540/480 660/540/480 660/540/480 Power outlet Running current 0.35... -
Page 7: Noise Criterion Curves
NOISE CRITERION CURVES <50Hz> <50Hz> SLZ-KA35VAL.TH SLZ-KA25VAL.TH NOTCH SPL(dB) LINE NOTCH SPL(dB) LINE SLZ-KA35VA.TH High SLZ-KA25VA.TH High Medium Medium SLZ-KA35VAL SLZ-KA25VAL SLZ-KA35VA SLZ-KA25VA NC-70 NC-70 NC-60 NC-60 NC-50 NC-50 NC-40 NC-40 NC-30 NC-30 APPROXIMATE APPROXIMATE TERESHOLD OF TERESHOLD OF HEARING FOR HEARING FOR NC-20 NC-20... -
Page 8: Outlines And Dimensions
OUTLINES AND DIMENSIONS SLZ-KA25VAL.TH Unit : mm SLZ-KA35VAL.TH SLZ-KA50VAL.TH SLZ-KA25VA.TH SLZ-KA35VA.TH SLZ-KA50VA.TH SLZ-KA25VAL SLZ-KA35VAL SLZ-KA50VAL SLZ-KA25VA SLZ-KA35VA SLZ-KA50VA... - Page 9 Unit : mm WIRELESS REMOTE CONTROLLER 17.5 ON/OFF WARM COOL SELECT AUTO COOL VANE TIME HEAT MODE RESET Installation area • Area in which the remote controller is not exposed to direct sunshine • Area in which there is no heating source nearby •...
- Page 10 Unit : mm WIRED REMOTE CONTROLLER...
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Page 11: Wiring Diagram
WIRING DIAGRAM SLZ-KA25VAL.TH SLZ-KA25VA.TH SLZ-KA25VAL .TH SLZ-KA25VA SLZ-KA35VAL.TH SLZ-KA35VA.TH SLZ-KA35VAL .TH SLZ-KA35VA SLZ-KA50VAL.TH SLZ-KA50VA.TH SLZ-KA50VAL .TH SLZ-KA50VA GRILLE TO OUTDOOR UNIT AC220-240V CNSK(RED) TRANS (D·HEATER) (D·U·M) (POWER (FAN) (POWER) BOARD) CNDK (CONTROL) FUSE CN3C DC13.1V CN2S(WHT) PINK LED2 SKY BLU X5 X4 LED1 (POWER... -
Page 12: Refrigerant System Diagram
REFRIGERANT SYSTEM DIAGRAM SLZ-KA25VAL.TH SLZ-KA25VA.TH SLZ-KA25VAL SLZ-KA25VA SLZ-KA35VAL.TH SLZ-KA35VA.TH SLZ-KA35VAL SLZ-KA35VA SLZ-KA50VAL.TH SLZ-KA50VA.TH SLZ-KA50VAL SLZ-KA50VA 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 13: Troubleshooting
TROUBLESHOOTING 7-1. CAUTIONS ON TROUBLESHOOTING (1) Before troubleshooting, check the followings: 1Check the power supply voltage. 2Check that the indoor/outdoor connecting wire is correct. (2) Take care of the followings during servicing. 1 Before servicing the air conditioner, be sure to turn off the remote controller first to stop the main unit, and then turn off the breaker. - Page 14 • Refer to the following tables for details on the check codes. [Output pattern A] Beeper sounds Beep Beep Beep Beep Beep Beep Beep OPERATION · · · Repeated INDICATOR lamp blink pattern Approx. 2.5 sec. 0.5 sec. 0.5 sec. 0.5 sec.
- Page 15 • On wireless remote controller 2The continuous buzzer sounds from receiving section of indoor unit. 3Blink of operation lamp • On wired remote controller 1Check code displayed on the LCD. • 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...
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Page 16: Self-Diagnosis Action Table
Note: Refer to the manual of outdoor unit for the details of display 7-3. SELF-DIAGNOSIS ACTION TABLE such as F, U, and other E. Abnormal point and detection method Countermeasure Error Code Cause 1 Defective thermistor 1–3 Check resistance value of thermistor. Room temperature thermistor (TH1) 1 The unit is in 3-minute resume characteristics... - Page 17 Abnormal point and detection method Countermeasure Error Code Cause Freezing/overheating protection is (Cooling or drying mode) (Cooling or drying mode) working 1 Clogged filter (reduced airflow) 1 Check clogging of the filter. 1 Freezing protection (Cooling mode) 2 Short cycle of air path 2 Remove shields.
- Page 18 Abnormal point and detection method Countermeasure Error Code Cause Pipe temperature thermistor / 1 Defective thermistor 1–3 Check resistance value of thermistor. Condenser / Evaporator (TH5) For characteristics, refer to (P1) above. characteristics 2 Check contact failure of connector (CN29) 1 The unit is in 3-minute resume protec- 2 Contact failure of connector on the indoor controller board.
- Page 19 Abnormal point and detection method Countermeasure Error Code Cause 1 Check disconnection or looseness of indoor/ Indoor/outdoor unit communication 1 Contact failure, short circuit or, error (Signal receiving error) outdoor unit connecting wire of indoor unit or miswiring (converse wiring) of 1 Abnormal if indoor controller board outdoor unit.
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Page 20: Troubleshooting By Inferior Phenomena
7-4. TROUBLESHOOTING BY INFERIOR PHENOMENA 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 Power supply of rated voltage is not supplied to out- 1 Check the voltage of outdoor power is off. - Page 21 7-5. TEST POINT DIAGRAM 7-5-1. Indoor power board SLZ-KA25VAL.TH SLZ-KA25VA.TH SLZ-KA25VAL SLZ-KA25VA SLZ-KA35VAL.TH SLZ-KA35VA.TH SLZ-KA35VAL SLZ-KA35VA SLZ-KA50VAL.TH SLZ-KA50VA.TH SLZ-KA50VAL SLZ-KA50VA CN2S Connect to the indoor controller board (CN2D) between 1 to 3 12.6-13.7V DC (Pin1 (+)) CNSK Connect to the indoor controller board (CNDK) between 1 to 3 220-240V AC...
- Page 22 7-5-2. Indoor controller board SLZ-KA25VAL.TH SLZ-KA25VA.TH SLZ-KA25VAL SLZ-KA25VA SLZ-KA35VAL.TH SLZ-KA35VA.TH SLZ-KA35VAL SLZ-KA35VA SLZ-KA50VAL.TH SLZ-KA50VA.TH SLZ-KA50VAL SLZ-KA50VA CN2D LED1 LED2 Connector to the indoor LED3 Power supply power board (CN2S) Power supply Transmission (I.B) (12.5~13.7V DC) (R.B) (Indoor/outdoor) CN3C – Transmission (Indoor/outdoor) CN22 (0~24V DC)
- Page 23 7-6. TROUBLE CRITERION OF MAIN PARTS SLZ-KA25VAL.TH SLZ-KA25VA.TH SLZ-KA25VAL SLZ-KA25VA SLZ-KA35VAL.TH SLZ-KA35VA.TH SLZ-KA35VAL SLZ-KA35VA SLZ-KA50VAL.TH SLZ-KA50VA.TH SLZ-KA50VAL SLZ-KA50VA Part name Check method and criterion Room temperature Measure the resistance with a tester. thermistor (Part temperature 10°C ~ 30°C) (TH1) Normal Abnormal Pipe temperature 4.3kΩ~9.6k"...
- Page 24 <Thermistor Characteristic graph> •Room temperature thermistor (TH1) < Thermistor for lower temperature > Thermistor for •Pipe temperature thermistor/liquid (TH2) lower temperature •Condenser/evaporator temperature thermistor (TH5) Thermistor R =15k' ± 3% Fixed number of B=3480 ± 2% Rt=15exp { 3480( 273+t 15k' 9.6k' 6.3k'...
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Page 25: Way Air Flow System
4-WAY AIR FLOW SYSTEM 8-1. 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 [100 [73.4 3-[2.8 hole... - Page 26 8-4. 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.
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Page 27: Disassembly Procedure
DISASSEMBLY PROCEDURE SLZ-KA25VAL.TH SLZ-KA25VA.TH SLZ-KA25VAL SLZ-KA25VA SLZ-KA35VAL.TH SLZ-KA35VA.TH SLZ-KA35VAL SLZ-KA35VA SLZ-KA50VAL.TH SLZ-KA50VA.TH SLZ-KA50VAL SLZ-KA50VA Be careful on removing heavy parts. OPERATING PROCEDURE PHOTOS&ILLUSTRATIONS 1. Removing the air intake grille Figure 1 (1) Slide the knob of air intake grille to the direction of the arrow 1 to open the air intake grille. - Page 28 OPERATING PROCEDURE PHOTOS&ILLUSTRATIONS 5. Removing the room temperature thermistor (TH1) Photo 4 (1) Remove the panel. (Refer to 3) Connectors (2) Pull out the room temperature thermistor from the drain pan. Drain plug Control box (3) Remove the 2 screws fixed to the control box cover, and remove the control box cover.
- Page 29 OPERATING PROCEDURE PHOTOS&ILLUSTRATIONS 9. Removing the drain pump (DP) and drain sensor (DS) Photo 7 Cover Screw (1) Remove the panel. (Refer to 3 ) (2) Remove the drain pan. (Refer to 6) (3) Remove the 2 screws fixed to the control box cover, and Control remove the control box cover.
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Page 30: Parts List
PARTS LIST (Non RoHS compliant) PANEL PARTS SLP-2AL(FOR SLZ-KA25/35/50VAL.TH) SLP-2AA(FOR SLZ-KA25/35/50VA.TH) Q'ty/set Wiring Recom- Remarks Parts No. Specification Parts name Diagram mended (Drawing No.) Symbol Q'ty SLP-2AL SLP-2AA AIR OUTLET GRILLE AIR OUTLET GRILLE WIRELSS REMOTE CONTROL BOARD AUTO VANE CORNER PANEL AIR FILTER INTAKE GRILLE... - Page 31 ELECTRICAL PARTS SLZ-KA25VAL.TH SLZ-KA25VA.TH SLZ-KA35VAL.TH SLZ-KA35VA.TH SLZ-KA50VAL.TH SLZ-KA50VA.TH Q'ty/set Wiring Recom- Remarks SLZ-KA Diagram mended Parts No. Specification Parts name (Drawing No.) Symbol Q'ty VAL.TH VA.TH FUSE 250V 6.3A FUSE VARISTOR INDOOR CONTROLLER BOARD INDOOR CONTROLLER BOARD INDOOR CONTROLLER BOARD TERMINAL BLOCK 3P(S1,S2,S3) TERMINAL BLOCK...
- Page 32 FUNCTIONAL PARTS SLZ-KA25VAL.TH SLZ-KA35VAL.TH SLZ-KA50VAL.TH SLZ-KA25VA.TH SLZ-KA35VA.TH SLZ-KA50VA.TH ON/OFF WARM COOL SELECT AUTO COOL VANE TIME HEAT MODE RESET TEMP. ON/OFF...
- Page 33 Q'ty/set Wiring Recom- Remarks SLZ-KA Parts No. Parts name Specification Diagram mended (Drawing No.) Symbol Q'ty VAL.TH VA.TH BASE DRUM-1 LEG-1 DRUM-2 INDOOR HEAT EXCHANGER INDOOR HEAT EXCHANGER INDOOR HEAT EXCHANGER MOTOR MOUNT 3PCS/SET INDOOR FAN MOTOR PK6V15-LD INDOOR FAN MOTOR PK6V20-LL INDOOR FAN MOTOR PK6V20-LM...
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Page 34: Rohs Parts List
RoHS PARTS LIST PANEL PARTS SLP-2AL (FOR SLZ-KA25/35/50VAL.TH) SLP-2AA (FOR SLZ-KA25/35/50VA.TH) SLP-2ALW (FOR SLZ-KA25/35/50VAL .TH) SLP-2AAW (FOR SLZ-KA25/35/50VA .TH) Q'ty/set Wiring Recom- Remarks Parts No. Parts name Specification SLP-2 Diagram mended (Drawing No.) Symbol Q'ty ALW AAW AIR OUTLET GRILLE AIR OUTLET GRILLE AIR OUTLET GRILLE AIR OUTLET GRILLE... - Page 35 ELECTRICAL PARTS SLZ-KA25VAL.TH SLZ-KA25VA.TH SLZ-KA25VAL SLZ-KA25VA SLZ-KA35VAL.TH SLZ-KA35VA.TH SLZ-KA35VAL SLZ-KA35VA SLZ-KA50VAL.TH SLZ-KA50VA.TH SLZ-KA50VAL SLZ-KA50VA Q'ty/set Wiring Recom- Remarks SLZ-KA Specification Diagram mended Parts No. Parts name (Drawing No.) Symbol Q'ty .TH VA FUSE 250V 6.3A FUSE VARISTOR INDOOR CONTROLLER BOARD INDOOR CONTROLLER BOARD INDOOR CONTROLLER BOARD TERMINAL BLOCK...
- Page 36 FUNCTIONAL PARTS SLZ-KA25VAL.TH SLZ-KA35VAL.TH SLZ-KA50VAL.TH SLZ-KA25VA.TH SLZ-KA35VA.TH SLZ-KA50VA.TH SLZ-KA25VAL SLZ-KA35VAL SLZ-KA50VAL SLZ-KA25VA SLZ-KA35VA SLZ-KA50VA ON/OFF WARM COOL SELECT AUTO COOL HEAT VANE TIME MODE RESET TEMP. ON/OFF...
- Page 37 Q'ty/set Wiring Recom- SLZ-KA Remarks Parts No. Parts name Specification Diagram mended (Drawing No.) Symbol Q'ty .TH VA BASE DRUM-1 LEG-1 DRUM-2 INDOOR HEAT EXCHANGER INDOOR HEAT EXCHANGER INDOOR HEAT EXCHANGER MOTOR MOUNT 3PCS/SET INDOOR FAN MOTOR PK6V15-LD INDOOR FAN MOTOR PK6V20-LL INDOOR FAN MOTOR PK6V20-LM...
- Page 40 HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN CCopyright 2005 MITSUBISHI ELECTRIC ENGINEERING CO., LTD. Distributed in Jul. 2007 No.OC320 REVISED EDITION-B PDF 7 Distributed in Sep. 2006 No.OC320 REVISED EDITION-A PDF 7 New publication, effective Jul. 2007 Distributed in Feb.