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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
SPLIT-TYPE, AIR CONDITIONERS
SERVICE MANUAL
Indoor unit
[Model Name]
PLA-ZRP100BA
Model name
indication
INDOOR UNIT
ON/OFF
TEMP
WIRELESS REMOTE
CONTROLLER
[Service Ref.]
PLA-ZRP100BA
PLA-ZRP100BAR1
PLA-ZRP100BAR1-ER
TEMP.
ON/OFF
WIRED REMOTE
CONTROLLER
CONTENTS
1. REFERENCE MANUAL .................................. 2
2. SAFETY PRECAUTION .................................. 3
3. PARTS NAMES AND FUNCTIONS ................ 4
4. SPECIFICATIONS .......................................... 11
5. NOISE CRITERION CURVES ....................... 12
6. OUTLINES AND DIMENSIONS ..................... 13
7. WIRING DIAGRAM ........................................ 14
8. REFRIGERANT SYSTEM DIAGRAM ........... 15
9. TROUBLESHOOTING ................................... 16
10. SPECIAL FUNCTION .................................... 32
11. DISASSEMBLY PROCEDURE ...................... 42
PARTS CATALOGUE (OCB529)
July 2014
No. OCH529
REVISED EDITION-A
Revision:
•
Added
PLA-ZRP100BAR1 and
PLA-ZRP100BAR1-ER in
REVISED EDITION-A.
• Some descriptions have
been modified.
• Please void OCH529.
Notes:
• This manual describes
service data of the indoor
units only.
• RoHS compliant prod-
ucts have <G> mark on
the spec name plate.
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Table of Contents
Related Manuals for Mitsubishi Electric PLA Series
Summary of Contents for Mitsubishi Electric PLA Series
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Page 1: Table Of Contents
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS SPLIT-TYPE, AIR CONDITIONERS July 2014 No. OCH529 REVISED EDITION-A SERVICE MANUAL Indoor unit Revision: [Model Name] [Service Ref.] • Added PLA-ZRP100BA PLA-ZRP100BAR1 and PLA-ZRP100BA PLA-ZRP100BAR1-ER in REVISED EDITION-A. PLA-ZRP100BAR1 • Some descriptions have been modified. PLA-ZRP100BAR1-ER •... -
Page 2: Reference Manual
TECHNICAL CHANGES Service ref. have been changed as follows. PLA-ZRP100BA PLA-ZRP100BAR1(-ER) • S/W (for dual set temperature) has been changed. REFERENCE MANUAL OUTDOOR UNIT’S SERVICE MANUAL Model Name Service Ref. Service Manual No. PUHZ-ZRP100VKA PUHZ-ZRP100VKA OCH527 PUHZ-ZRP100YKA PUHZ-ZRP100YKA OCB527 PUHZ-P100VHA4 PUHZ-P100VHA4.UK OCH415 PUHZ-P100YHA2... -
Page 3: Safety Precaution
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. valve. -
Page 4: Parts Names And Functions
Unit Gravimeter [3] Service tools Use the below service tools as exclusive tools for R410A refrigerant. Tool name Specifications Gauge manifold · Only for R410A · Use the existing fitting specifications . (UNF1/2) · Use high-tension side pressure of 5.3MPa·G or over. Charge hose ·... - Page 5 3-2. WIRELESS REMOTE CONTROLLER CHECK TEST RUN display CHECK and TEST RUN display indicate that the unit is being checked or test-run. MODEL SELECT display Blinks when model is selected. display Lights up while the signal is transmitted to the indoor unit when the button is pressed. display SET TEMP.
- Page 6 3-3. WIRED REMOTE CONTROLLER <PAR-30MAA> <PAR-31MAA> Wired remote controller function The functions which can be used are restricted according to each model. : Supported : Unsupported PAR-30MAA/PAR-31MAA Function PAR-21MAA Slim City multi Body Product size H × W × D (mm) 120 ×...
- Page 7 Room Set temp. Cool Auto Mode Temp. The main display can be displayed in two different modes: "Full" and "Basic". The factory setting is "Full". To switch to the "Basic" mode, change the setting on the Main display setting. <Full mode> <Basic mode>...
- Page 8 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.
- Page 9 Main menu list Setting and display items Setting details Vane · Louver · Vent. (Lossnay) Use to set the vane angle. • Select a desired vane setting from five 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 10 3-4. WIRED REMOTE CONTROLLER <PAR-21MAA> “Sensor” indication Display Section Displays when the remote controller sensor is used. Day-of-Week For the purposes of explanation, Shows the current day of the week. all parts of the display are shown. During actual operation, only Time/Timer Display the relevant items will be lit.
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Page 11: Specifications
SPECIFICATIONS Service Ref. PLA-ZRP100BA PLA-ZRP100BAR1 PLA-ZRP100BAR1-ER Mode Cooling Heating Power supply (phase, cycle, voltage) Single phase, 50Hz, 230V Input 0.08 0.07 0.74 Running current 0.66 External finish (Panel) Munsell 6.4Y 8.9/0.4 Heat exchanger Plate fin coil Fan (drive) o No. Turbo fan (direct) o 1 Fan motor output 0.120... -
Page 12: Noise Criterion Curves
NOISE CRITERION CURVES PLA-ZRP100BA NOTCH SPL(dB) LINE High PLA-ZRP100BAR1 Medium1 Medium2 PLA-ZRP100BAR1-ER NC-70 NC-60 NC-50 NC-40 NC-30 APPROXIMATE THRESHOLD OF HEARING FOR NC-20 CONTINUOUS NOISE 1000 2000 4000 8000 BAND CENTER FREQUENCIES, Hz UNIT CEILING 1.5m MICROPHONE OCH529A... -
Page 13: Outlines And Dimensions
OUTLINES AND DIMENSIONS PLA-ZRP100BA PLA-ZRP100BAR1 PLA-ZRP100BAR1-ER Unit: mm Ceiling hole 20~45 20~45 860~910 Detail connecting of branch duct(Both aspects) Fresh air Suspension bolt pitch intake hole Cut out hole Remote controller terminal block Indoor unit/Outdoor unit Branch duct hole connecting terminal block Branch duct hole 14-[2.8 [175... -
Page 14: Wiring Diagram
WIRING DIAGRAM PLA-ZRP100BA PLA-ZRP100BAR1 PLA-ZRP100BAR1-ER [LEGEND] SYMBOL NAME SYMBOL NAME <Table 1> SW1 (MODEL SELECTION) INDOOR CONTROLLER BOARD TERMINAL BLOCK (Indoor unit Power (option)) MODELS Service CN2L CONNECTOR (LOSSNAY) TERMINAL BLOCK (INDOOR/OUTDOOR CONNECTING LINE) 1 2 3 4 5 CN32 CONNECTOR (REMOTE SWITCH) TB5,TB6 TERMINAL BLOCK (REMOTE CONTROLLER... -
Page 15: Refrigerant System Diagram
REFRIGERANT SYSTEM DIAGRAM PLA-ZRP100BA PLA-ZRP100BAR1 PLA-ZRP100BAR1-ER Strainer (#50) Heat exchanger Refrigerant GAS pipe connection (Flare) Thermistor TH5 (Cond./ Eva.temperature) Refrigerant flow in cooling Refrigerant flow in heating Refrigerant LIQUID pipe connection (Flare) Thermistor TH2 (Pipe temperature/ liquid) Thermistor TH1 (Room temperature) Strainer (#50) Distributor with strainer (#50) -
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 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 17 9-2. MALFUNCTION-DIAGNOSIS METHOD BY REMOTE CONTROLLER <In case of trouble during operation> 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> [Procedure] 1.
- Page 18 • 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 flash pattern Approx. 2.5 sec. 0.5 sec. 0.5 sec. 0.5 sec.
- Page 19 • If the unit cannot be operated properly after test run, refer to the following table to find the cause. Symptom Cause Wired remote controller LED 1, 2 (PCB in outdoor unit) •For about 2 minutes following power-on,op- For about 2 After LED 1, 2 are lighted, LED 2 is PLEASE WAIT turned off, then only LED 1 is...
- Page 20 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 9-3. SELF-DIAGNOSIS ACTION TABLE outdoor unit's service manual for the details. Abnormal point and detection method Countermeasure Check code...
- Page 21 Abnormal point and detection method Countermeasure Check code Cause Freezing/overheating protection is oper- ating (Cooling or drying mode) (Cooling or drying mode) 1 Freezing protection (Cooling mode) 1 Clogged filter (reduced airflow) 1 Check clogs of the filter. The unit is in 6-minute resume preven- 2 Short cycle of air path 2 Remove the blockage.
- Page 22 Abnormal point and detection method Countermeasure Check code Cause Pipe temperature thermistor/ Condenser-Evaporator (TH5) 1–3 Check resistance value of thermistor. 1 The unit is in 3-minute resume protec- 1 Defective thermistor character- For characteristics, refer to (P1) above. tion mode if short/open of thermistor is istics 2 Check contact failure of connector (CN44) detected.
- Page 23 Abnormal point and detection method Countermeasure Check code Cause Indoor/outdoor unit communication Note: Check LED display on the outdoor control error (Signal receiving error) circuit board. (Connect A-control service 1 Abnormal if indoor controller board 1 Contact failure, short circuit or, tool, PAC-SK52ST) Refer to outdoor unit ser- cannot receive any signal normally for 6 miswiring (converse wiring) of...
- Page 24 Abnormal point and detection method Countermeasure Check code Cause Abnormal refrigerant circuit 1 When this error occurs, be sure to replace 1 Abnormal operation of 4-way During Cooling, Dry, or Auto Cooling the 4-way valve. valve operation, the following conditions are 2 Check refrigerant pipes for disconnection or 2 Disconnection of or leakage in regarded as failures when detected for 1...
- Page 25 9-4. TROUBLESHOOTING OF PROBLEMS Note: Refer to the outdoor unit's service manual for the detail of remote controller. 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 sup- ply terminal block (L, N) or (L door unit.
- Page 26 Note: Refer to the outdoor unit's service manual for the detail of remote controller. Phenomena Cause Countermeasure (2) LED2 on indoor controller board • When LED1 on indoor controller board is also blinking. Check indoor/outdoor unit connecting wire is blinking. Connection failure of indoor/outdoor unit connecting for connection failure.
- Page 27 9-5. EMERGENCY OPERATION 9-5-1. When wireless remote controller fails or its battery is exhausted When the remote controller cannot be used When the batteries of the remote controller run out or the remote control- ler malfunctions, the emergency operation can be done using the emer- gency buttons on the grille.
- Page 28 9-6. HOW TO CHECK THE PARTS PLA-ZRP100BA PLA-ZRP100BAR1 PLA-ZRP100BAR1-ER Parts name Check points Room temperature Disconnect the connector then measure the resistance with a tester. thermistor (TH1) (At the ambient temperature of 10 to 30:) Pipe temperature Normal Abnormal thermistor/liquid(TH2) Refer to “9-6-1.
- Page 29 9-6-1. Thermistor < Thermistor for lower temperature > <Thermistor Characteristic Graph> 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% Rt=15exp { 3480( 273+t 15 k"...
- Page 30 9-7. TEST POINT DIAGRAM Indoor controller board PLA-ZRP100BA PLA-ZRP100BAR1 PLA-ZRP100BAR1-ER CN3G LED3 Connect to the auto grille controller board (CN3G) Transmission (Indoor/outdoor) 13 V pulse output CN90 Connect to the wireless Vane motor output (MV) remote controller board (CNB) 12 V pulse output CN4Y i-see sensor Model selection...
- Page 31 9-8. FUNCTIONS OF DIP SWITCH AND JUMPER WIRE Each function is controlled by the DIP switch and the jumper wire on the indoor controller board. SW1 and SW2 are equipped only for service parts. Model setting and capacity setting are preset in the nonvolatile memory of the controller board of the unit. The black square (■) indicates a switch position.
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Page 32: Special Function
SPECIAL FUNCTION 10-1. HOW TO PERFORM THE UP/DOWN OPERATION OF THE AIR INTAKE GRILLE 10-1-1. Setting up the lowering distance of air intake grille Unit You can set up 8 different stages of lowering distance for Decorative the air intake grille according to the set up location if desired. panel Note that as a factory default, the decorative panel will automatically stop at 1.6 m from the ceiling level. - Page 33 10-1-2. How to perform the up/down operation using wireless remote controller Ensure that the air-conditioner is not running. Warning: • Otherwise, it may cause an injury or a failure. 1) Ensure that the air-conditioner is not running. 2) Press the "Down" button to lower the air intake grille. By default, the air intake grille will automatically stop at a lowering distance of 1.6 m from the ceiling level.
- Page 34 10-1-4. How to perform the up/down operation using wired remote controller (PAR-21MAA) General Operation ■ Raise or lower all the air intake grilles managed by the remote controller at the same time. Install the remote controller in a place where you can observe all the air-conditioners. Otherwise, the lowering grille may make contact with something and cause damage to it.
- Page 35 ■ Up/down operation with the individual specified air-conditioner (when used in combination with Mr. SLIM model) Raise or lower the air intake grille of the specific air-conditioner that you select from all that are managed by that remote controller. 1) Ensure that the air-conditioner is not running. Ensure that the air-conditioner is not running.
- Page 36 10-2. OPERATION (AUTO DESCENDING PANEL: PLP-6BAJ) (1) Normal operation 1 UP/DOWN Wire 1b Air intake grille is raised/lowered by UP/DOWN UP/DOWN commands of UP and DOWN. Machine 2 Machine 1 Air intake grille does not move under the state of no-load detection or obstacle detection. Air intake grille stops automatically at the set lowering distance from the ceiling level.
- Page 37 10-3. ELECTRICAL CIRCUIT (Controller board and wiring diagram (Panel)) 10-3-1. DIP SW 22 type SW22 Panel Indoor unit (WHT) LS21 CN3G CN90 (WHT) (BLK) CN2G (BLK) CN3G (BLK) FUSE CN22 (BLU) CN2F (BLK) CNAC (WHT) CN2E LS21 (RED) CN2C CN2B (WHT) GRN/YLW (WHT)
- Page 38 10-3-3. Check point of trouble <LED (SW22 type) /LED2 (SW2 type) display> Turn OFF : No power supply Blink : Storage detection switch ON (short) One blink : Storage detection switch OFF (open) Two blinks : Tension detection switch OFF (open) <controller board>...
- Page 39 10-5. ROTATION FUNCTION (AND BACK-UP FUNCTION, 2ND STAGE CUT-IN FUNCTION) 10-5-1. 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 40 • System constraint · This function is available only in cooling mode. Ex.) Set temp. by R/C = 20: [2nd stage cut-in function]··· Request code number "322~324" Set point = 26: When request code number is “323”. Room temp. ] Set point Room temp.
- Page 41 PAR-30MAA/PAR-31MAA Press the button. Main Main menu Maintenance Initial setting Select "Service" with the [Cursor] buttons ( ) or the [Page] buttons ( Service ), and press the button. Main display: Cursor Page Enter the current maintenance password (4 numerical digits). Service menu •...
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Page 42: Disassembly Procedure
DISASSEMBLY PROCEDURE PLA-ZRP100BA PLA-ZRP100BAR1 PLA-ZRP100BAR1-ER Be careful when removing heavy parts. OPERATING PROCEDURE PHOTOS & ILLUSTRATIONS 1. Removing the air intake grille Figure 1 (1) Slide the knob of air intake grille toward the arrow 1 to Filter open the air intake grille. (2) Remove drop prevention hook from the panel. - Page 43 OPERATING PROCEDURE PHOTOS & ILLUSTRATIONS Coil plate Photo 3 6. Removing the fan and fan motor (MF) (1) Remove the electrical box. (See Photo 2) (2) Remove the bell mouth (3 screws). (See Photo 2) (3) Remove the turbo fan nut. (4) Pull out the turbo fan.
- Page 44 OPERATING PROCEDURE PHOTOS & ILLUSTRATIONS Photo 7 10. Removing the drain pump (DP) and float switch (FS) (1) Remove the drain pan. (See Photo 6) Float switch (2) Cut the hose band and remove the hose. (3) Remove the drain pump assembly (3 screws and 2 hooks). Hose band (4) Remove the drain pump (3 screws).
- Page 45 OCH529A...
- Page 46 HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN CCopyright 2012 MITSUBISHI ELECTRIC CORPORATION Distributed in Jul. 2014 No.OCH529 REVISED EDITION-A New publication, effective Jul. 2014 Distributed in Oct. 2012 No.OCH529 Specifications are subject to change without notice.