Table of Contents
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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
SPLIT-TYPE, AIR CONDITIONERS
SERVICE MANUAL
Indoor unit
[Model Name]
PSA-M71KA
PSA-M100KA
PSA-M125KA
PSA-M140KA
PSA-M71KA-ER
PSA-M100KA-ER
PSA-M125KA-ER
PSA-M140KA-ER
PSA-M71KA-ET
PSA-M100KA-ET
PSA-M125KA-ET
PSA-M140KA-ET
[Service Ref.]
PSA-M71KA
PSA-M100KA
PSA-M125KA
PSA-M140KA
PSA-M71KA-ER
PSA-M100KA-ER
PSA-M125KA-ER
PSA-M140KA-ER
PSA-M71KA-ET
PSA-M100KA-ET
PSA-M125KA-ET
PSA-M140KA-ET
Model name
indication
R32/R410A
Notes:
• This manual describes only
service data of the indoor
units.
CONTENTS
1. REFERENCE MANUAL ······················· 2
2. SAFETY PRECAUTION ······················· 2
3. PARTS NAMES AND FUNCTIONS ········ 9
4. SPECIFICATIONS ···························· 10
5. NOISE CRITERION CURVES ············· 12
6. OUTLINES AND DIMENSIONS ··········· 13
7. WIRING DIAGRAM ··························· 14
9. TROUBLESHOOTING ······················· 16
10. SPECIAL FUNCTION ························ 27
11. DISASSEMBLY PROCEDURE ············ 29
12. REMOTE CONTROLLER ··················· 34
PARTS CATALOG (OCB724)
September 2021
No. OCH724
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Table of Contents
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Summary of Contents for Mitsubishi Electric PSA Series
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Page 1: Table Of Contents
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS SPLIT-TYPE, AIR CONDITIONERS September 2021 No. OCH724 SERVICE MANUAL R32/R410A Indoor unit [Model Name] [Service Ref.] Notes: PSA-M71KA PSA-M71KA • This manual describes only service data of the indoor PSA-M100KA PSA-M100KA units. PSA-M125KA PSA-M125KA PSA-M140KA PSA-M140KA PSA-M71KA-ER PSA-M71KA-ER... -
Page 2: Reference Manual
REFERENCE MANUAL 1-1. OUTDOOR UNIT’S SERVICE MANUAL Model Name Service Ref. Service Manual No. PUHZ-ZRP71VHA2 PUHZ-ZRP71VHA2(-ER/ET) OCH635/OCB635 PUHZ-ZRP100VKA3 PUHZ-ZRP100VKA3.UK PUHZ-ZRP125/140VKA3 PUHZ-ZRP125/140VKA3R1.UK PUHZ-ZRP100YKA3 PUHZ-ZRP100KA3R1.UK OCH645/OCB645 PUHZ-ZRP125/140YKA3 PUHZ-ZRP125/140YKA3R2.UK PUHZ-ZRP200/250YKA2 PUHZ-ZRP200/250YKA2.UK PUZ-ZM71VHA3 PUZ-ZM71VHA3.UK PUZ-ZM100/125/140VKA2 PUZ-ZM100/125/140VKA2(-ER/-ET).UK PUZ-ZM100/125/140YKA2 PUZ-ZM100/125/140YKA2(-ER/-ET).UK OCH771/OCB771 PUZ-ZM200/250YKA2 PUZ-ZM200/250YKA2.UK PUHZ-P100/125/140VKA PUHZ-P100/125/140VKA.TH(-ET/ER) OCH670/OCB670 PUHZ-P100/125/140YKA PUHZ-P100/125/140YKA.TH(-ET/ER) PUHZ-P200/250YKA2... - Page 3 2-2. CAUTIONS RELATED TO REFRIGERANT Cautions for units utilizing refrigerant R32/R410A Preparation before the repair service Precautions during the repair service • Prepare the proper tools. • Do not perform the work involving the electric parts with • Prepare the proper protectors. wet hands.
- Page 4 [1] Warning for service (1) Do not alter the unit. (2) For installation and relocation work, follow the instructions in the Installation Manual and use tools and pipe components specifically made for use with refrigerant specified in the outdoor unit installation manual. (3) Ask a dealer or an authorized technician to install, relocate and repair the unit.
- Page 5 [4] Cautions for unit using R32 refrigerant Basic work procedures are the same as those for conventional units using refrigerant R410A. However, pay careful attention to the following points. (1) Information on servicing (1-1) Checks on the Area Prior to beginning work on systems containing flammable refrigerants, safety checks are necessary to ensure that the risk of ignition is minimized.
- Page 6 (3) Repair to intrinsically Safe Components Do not apply any permanent inductive or capacitance loads to the circuit without ensuring that this will not exceed the permissible voltage and current permitted for the equipment in use. Intrinsically safe components are the only types that can be worked on while live in the presence of a flammable atmos- phere.
- Page 7 a) Become familiar with the equipment and its operation. b) Isolate system electrically. c) Before attempting the procedure, ensure that: • mechanical handling equipment is available, if required, for handling refrigerant cylinders; • all personal protective equipment is available and being used correctly; •...
- Page 8 Unit Electronic weighing scale [5] Service tools Use the below service tools as exclusive tools for R32/R410A refrigerant. Refer to the spec name plate on outdoor unit for the type of refrigerant being used. Tool name Specifications · Use the existing fitting specifications . (UNF1/2) Gauge manifold ·...
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Page 9: Parts Names And Functions
PARTS NAMES AND FUNCTIONS 3-1. Indoor Unit Disperses air left and right. Disperses air up and down. Removes dust and pollutants from intake air. (Intakes air from room.) 3-2. WIRED REMOTE CONTROLLER (OPTION) Refer to "12-1. REMOTE CONROLLER FUNCTIONS" for details. OCH724... -
Page 10: Specifications
SPECIFICATIONS Service Ref. PSA-M71KA(-ER/-ET) Mode Cool Heat Power supply (phase, frequency, voltage) Single phase, 50Hz, 230V Input 0.06 Running current 0.40 External finish Munsell 0.70Y 8.59/0.97 Heat exchanger Plate fin coil Fan(drive) х No. Centrifugal (direct) х 1 Fan motor output 0.12 Airflow(Low-Middle-High) m³/min... - Page 11 Service Ref. PSA-M140KA(-ER/-ET) Mode Cool Heat Power supply (phase, frequency, voltage) Single phase, 50Hz, 230V Input 0.11 Running current 0.73 External finish Munsell 0.70Y 8.59/0.97 Heat exchanger Plate fin coil Fan(drive) х No. Centrifugal (direct) х 1 Fan motor output 0.16 Airflow(Low-Middle-High) m³/min...
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Page 12: Noise Criterion Curves
NOISE CRITERION CURVES PSA-M100KA(-ER/-ET) PSA-M71KA(-ER/-ET) SPL(dB) LINE NOTCH SPL(dB) LINE NOTCH PSA-M125KA(-ER/-ET) High High Middle Middle 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 NC-20 HEARING FOR NC-20 CONTINUOUS CONTINUOUS NOISE NOISE 1000... -
Page 13: Outlines And Dimensions
OUTLINES AND DIMENSIONS Unit: mm OCH724... -
Page 14: Wiring Diagram
WIRING DIAGRAM SYMBOL NAME SYMBOL NAME SYMBOL NAME WIRED REMOTE CONTROLLER BOARD INDOOR CONTROLLER BOARD COND./EVA. TEMPERATURE THERMISTOR (0:/15kΩ, 25:/5.4kΩ DETECT) FUSE FUSE (T6.3AL250V) TERMINAL BLOCK (REMOTE CONTROLLER TRANSMISSION LINE) CN2L CONNECTOR (LOSSNAY) OPTION PARTS CN32 CONNECTOR (REMOTE SWITCH) REACTOR PCB FOR WIRELESS REMOTE CONTROLLER FAN MOTOR CN41... -
Page 15: Refrigerant System Diagram
REFRIGERANT SYSTEM DIAGRAM 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 OCH724... -
Page 16: Troubleshooting
TROUBLESHOOTING 9-1. 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 controller or controller board of outdoor unit. Actions to be taken for service, which depends on whether or not the trouble is reoccurring in the field, are summarized in the table below. - Page 17 Error code [Output pattern A] Errors detected by indoor unit Check code Symptom Remark Intake sensor error E6, E7 Indoor/outdoor unit communication error Freezing/Overheating safeguard operation Communication error between indoor and outdoor units Pipe temperature error Controller signal receiving error Refrigerant leakage Refrigerant sensor error Refrigerant circuit abnormal...
- Page 18 9-3. SELF-DIAGNOSIS ACTION TABLE Note: Refer to the manual of outdoor unit for the details of display such as F, U, and other E. Abnormal point and detection method Countermeasure Check Code Cause Room temperature thermistor (TH1) 1 Defective thermistor 1–3 Check resistance value of thermistor.
- Page 19 Abnormal point and detection method Countermeasure Check Code Cause Pipe temperature 1 Slight temperature difference 14Check pipe <liquid or condenser/ <Cooling mode> between indoor room evaporator> temperature with room Detected as abnormal when the pipe temperature and pipe <liquid temperature display on remote controller temperature is not in the cooling range or condenser/evaporator>...
- Page 20 Abnormal point and detection method Countermeasure Check Code Cause Remote controller transmission error/ 1 Contact failure at transmission 1 Check disconnection or looseness of indoor unit or transmission wire of remote controller. signal receiving error (E0/E4) wire of remote controller 2 Set one of the remote controllers “main”...
- Page 21 Abnormal point and detection method Countermeasure Check Code Cause Indoor/outdoor unit communication 1 Defective transmitting receiving cir- 1–3 Turn the power off, and on again to error (Transmitting error) cuit of indoor controller board check. If abnormality occurs again, Abnormal if “1” receiving is detected 30 2 Noise has entered into power sup- replace indoor controller board.
- Page 22 9-4. TROUBLESHOOTING BY INFERIOR PHENOMENA Phenomena Cause Countermeasure (1) LED2 on indoor controller board • When LED1 on indoor controller board is also off. is off. 1 Power supply of rated voltage is not supplied to out- 1 Check the voltage of outdoor power supply door unit.
- Page 23 Note: Refer to the manual of outdoor unit for the detail of remote controller. Phenomena Cause Countermeasure (2) LED2 on indoor controller board • When LED1 on indoor controller board is also blinking. is blinking. 1 Connection failure of indoor/outdoor unit connecting 1 Check indoor/outdoor unit connecting wire wire for connection failure.
- Page 24 9-5-1. Thermistor <Thermistor characteristic graph> < Thermistor for lower temperature > Room temperature thermistor (TH1) Thermistor for Pipe temperature thermistor (TH2) lower temperature Condenser/evaporator temperature thermistor (TH5) Thermistor R =15 k" ± 3% Fixed number of B=3480 ± 2% Rt=15exp { 3480( 273+t 0°C 15 kΩ...
- Page 25 9-6. TEST POINT DIAGRAM Indoor controller board CN90 Connect to the wireless remote controller receiver J11,J13,J14 board (CNB) Model selection LED3 Transmission (Indoor/outdoor) Capacity setting CN105 CN2L IT terminal Connector (LOSSNAY) Jumper wire J41,J42 LED2 Pair No. setting for wireless Power supply (R.B) remote controller CN44...
- Page 26 9-7. FUNCTIONS OF DIP SWITCH AND JUMPER WIRE Each function is controlled by the DIP switch and the jumper wire on control P.C. board. Model setting and capacity setting are memorized in the nonvolatile memory of the control P.C. board of the unit.
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Page 27: Special Function
SPECIAL FUNCTION 10-1. ROTATION FUNCTION (AND BACK-UP FUNCTION, 2ND STAGE CUT-IN FUNCTION) 10-1-1. Operation (1) Rotation function (and Back-up function) • Outline of functions · Main and sub unit operate alternately according to the interval of rotation setting. Main and sub unit should be set by refrigerant address. (Outdoor DIP switch setting) Refrigerant address "00"... - Page 28 10-1-2. How to set rotation function (Back-up function, 2nd stage cut-in function) You can set these functions by wired remote controller. (Maintenance monitor) NOTICE Both main and sub unit should be set in same setting. Every time replacing indoor controller board for servicing, the function should be set again. (1) Request Code List Rotation setting Setting No.
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Page 29: Disassembly Procedure
DISASSEMBLY PROCEDURE : Indicates the visible parts in the photos/figures. : Indicates the invisible parts in the photos/figures. OPERATING PROCEDURE PHOTOS/FIGURES Photo 1 1. Removing the intake grille (1) Remove the screw at the center of the knob of the intake grille. - Page 30 OPERATING PROCEDURE PHOTOS/FIGURES 4. Removing the R32 sensor Photo 4-1 (1) Remove the intake grille. (Refer to Procedure 1) (2) Remove the 2 screws of the sensor cover. (Refer to Photo Sensor cover 4-1) (3) Disconnect the white connector CN1 on the R32 sensor. (4) Unlock the catch of the holder, and remove the R32 sensor.
- Page 31 OPERATING PROCEDURE PHOTOS/FIGURES 5. Removing the indoor fan and the indoor fan motor Photo 5-1 (1) Remove the intake grille. (Refer to Procedure 1) (2) Remove the electrical parts cover. (Refer to Procedure 2) (3) Turn the bell mouth clockwise to remove. (4) Remove the fan nut and the washer.
- Page 32 OPERATING PROCEDURE PHOTOS/FIGURES 7. Removing the louver motor Photo 7-1 Top panel (1) Remove the intake grille. (Refer to Procedure 1) Screws of top panel (2) Remove the electrical parts cover. (Refer to Procedure 2) (3) Remove the front panel. (Refer to Procedure 6) (4) Remove the 5 screws of the swing louver and remove the swing louver.
- Page 33 OPERATING PROCEDURE PHOTOS/FIGURES 9. Removing the indoor heat exchanger Photo 9-1 Screws of indoor heat exchanger (1) Remove the intake grille. (Refer to Procedure 1) (2) Remove the front panel. (Refer to Procedure 6) (3) Remove the swing louver. (See Photos 7-1 and 7-2) (4) Remove the 6 screws of the top panel and remove the top panel.
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Page 34: Remote Controller
REMOTE CONTROLLER 12-1. REMOTE CONTROLLER FUNCTIONS <PAR-41MAA> Controller interface The functions of the function buttons change depending on the screen. Refer to the button function guide that appears at the bottom of the LCD for the functions they serve on a given screen. When the system is centrally controlled, the button function guide that corresponds to the locked button will not appear. - Page 35 Display The main display can be displayed in two different modes: ˝Full˝ and ˝Basic˝. The initial setting is ˝Full˝. To switch to the ˝Basic˝ mode, change the setting on the Main display setting. (Refer to operation manual included with remote controller.) <Full mode>...
- Page 36 Menu structure Main menu Press the button. Move the cursor to the desired item with the buttons, and press the button. Operation Vane · 3D i-See · Vent. (Lossnay) High power Comfort Manual vane angle 3D i-See sensor Vertical air direction Horizontal air direction Timer menu Timer...
- Page 37 Continue from the previous page. Maintenance menu Error information Filter information Cleaning Auto descending panel Descending operation Descending adjustment Service menu Test run menu Test run Drain pump test run Maintenance information Collect model names and serial No. Model name input Serial No.
- Page 38 Main menu list Main Setting and display items Setting details menu Operation Vane · 3D i-See · Vent. Vane: Use to set the vertical air direction. (Vane.Vent. (Lossnay)) Louver: Use to set the horizontal air direction. 3D i-See sensor: This setting is available only for the air conditioners that support easy setting function of motion sensing air direction.
- Page 39 Main Setting and display items Setting details menu Initial Basic Main/Sub When connecting 2 remote controllers, one of them needs to be designated as setting setting a sub controller. Clock Use to set the current time. Daylight Set the daylight saving time. saving time Administrator The administrator password is required to make the settings for the following...
- Page 40 <PAR-SL97A-E> Controller interface Transmission area Transmission indicator Remote controller display Timer indicator *For explanation purposes, all of the items that appear in the display are shown. *All items are displayed when the Reset button is pressed. Operation areas ON/OFF button Temperature setting buttons Fan Speed button (Changes fan speed) Timer Off button...
- Page 41 <PAR-SL101A-E> Controller interface Transmission area Remote controller display Set Temperature buttons OFF/ON button Mode button (Changes operation mode) Fan Speed button (Changes fan speed) Airflow button (Changes up/ i-see button* down airflow direction) Timer ON button Menu button Timer OFF button SET/SEND button Weekly timer ON/OFF button* CANCEL button...
- Page 42 12-2. ERROR INFORMATION When an error occurs, the following screen will appear. Check the error status, stop the operation, and consult your dealer. 1. Check code, error unit, refrigerant address, date and time of occur- Error information rence, model name, and serial number will appear. Error code The model name and serial number will appear only if the informa- Error unit...
- Page 43 • Checking the error information Maintenance menu While no errors are occurring, page 2/2 of the error information can be Error information viewed by selecting ˝Error information˝ from the Maintenance menu. Filter information Errors cannot be reset from this screen. Cleaning Main menu: Cursor...
- Page 44 12-3. SERVICE MENU Maintenance password is required 1. Select ˝Service˝ from the Main menu, and press the [ ] button. Main Main menu *At the main display, the menu button and select ˝Service˝ to make the maintenance setting. Service 2. When the Service menu is selected, a window will appear asking for the pass- Service menu word.
- Page 45 12-4. TEST RUN 12-4-1. PAR-41MAA 1. Select ˝Service˝ from the Main menu, and press the [ ] button. Test run Input maintenance info. Settings Check Select ˝Test run˝ with the F1 or F2 button, and press the [ Others ] button. 2.
- Page 46 12-4-2. PAR-SL97A-E Measure an impedance between the power supply terminal block on the outdoor unit and ground with a 500 V Megger and check that it is equal to or greater than 1.0 MΩ. TEST RUN 1. Turn on the main power to the unit. TEST RUN 2.
- Page 47 12-5. FUNCTION SETTING 12-5-1. PAR-41MAA Settings menu 1. Select ˝Service˝ from the Main menu, and press the [ ] button. Function setting Rotation setting Select ˝Setting˝ from the Service menu, and press the [ ] button. Service menu: Select ˝Function setting˝, and press the [ ] button.
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Page 48: Pattern 2
Pattern 2 Function setting Ref. address Grp. (1/8) 4. Toggle through the pages with the F3 or F4 button. Mode 1 Mode 2 Mode 3 5. Select the mode number with the F1 or F2 button, and then press the [ Mode 4 Save: button. -
Page 49: Mode
12-5-2. PAR-SL97A-E Functions can be selected with the wireless remote controller. Function selection using wireless remote controller is available only for refriger- ant system with wireless function. Refrigerant address cannot be specified by the wireless remote controller. [Flow of function selection procedure] Flow of function selection procedure The flow of the function selection procedure is shown below. -
Page 50: Mode
12-5-3. PAR-SL101A-E 1. Going to the function select mode Press the button between of 5 seconds. (Start this operation from the status of remote controller display turned off.) [CHECK] is lit and ˝00˝ blinks. (Fig. 1) Press the button to set the ˝50˝. Direct the wireless remote controller toward the receiver of the indoor unit and press the button. -
Page 51: Cursor
12-6. ERROR HISTORY 1. Select ˝Service˝ from the Main menu, and press the [ ] button. Test run Input maintenance info. Settings Check Others Select ˝Check˝ with the F1 or F2 button, and press the [ button. Select ˝Error history˝ with the F1 or F2 button, and press the [ ] button. - Page 52 5. Preliminary error history Preliminary error hist. Error Unt# dd/mm/yy Select "Preliminary error hist." from the Error history menu, and press the ] button. 32 preliminary error history records will appear. Error history menu: Page Delete 4 records are shown per page, and the top record on the first page indicates the latest error record.
- Page 53 12-7. SELF-DIAGNOSIS 12-7-1. PAR-41MAA 1. Select ˝Service˝ from the Main menu, and press the [ ] button. Diagnosis Self check Select ˝Check˝ from the Service menu, Remote controller check and press the [ ] button. Service menu: Select ˝Diagnosis˝ from the Check menu, Cursor and press the [ ] button.
- Page 54 12-7-2. PAR-SL97A-E When a malfunction occurs to air conditioner, both indoor unit and outdoor unit will stop and operation lamp blinks to inform unusual stop. < Malfunction-diagnosis method at maintenance service> Refrigerant [Procedure] address display 1. Press the CHECK button twice. CHECK •...
- Page 55 12-8. REMOTE CONTROLLER CHECK If operations cannot be completed with the remote controller, diagnose the remote controller with this function. 1. Select ˝Service˝ from the Main menu, Diagnosis and press the [ ] button. Self check Remote controller check Select ˝Check˝ from the Service menu, and press the [ ] button.
- Page 56 12-9. SMOOTH MAINTENANCE 1. Select ˝Service˝ from the Main menu, and press the [ ] button. Check menu Error history Diagnosis Smooth maintenance Request code Select ˝Check˝ with the F1 or F2 button, and press the [ ] button. Service menu: Cursor Select ˝Smooth maintenance˝...
- Page 57 ■ Refrigerant address Single refrigerant system Multi refrigerant system (group control) In the case of single refrigerant system, the refrigerant address Up to 16 refrigerant systems (16 outdoor units) can be con- is ˝00˝ and no operation is required. nected as a group by 1 remote controller. To check or set the Simultaneous twin, triple units belong to this category refrigerant addresses.
- Page 58 HEAD OFFICE: TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN CCopyright 2021 MITSUBISHI ELECTRIC CORPORATION Published: Sep. 2021 No. OCH724 Specifications are subject to change without notice. Made in Japan.