Table of Contents
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SPLIT-TYPE, AIR CONDITIONERS
TECHNICAL & SERVICE MANUAL
Series PK
Indoor unit
[ Model names ]
2000, 2001
PK-2.5FLD
PK-3FLD
PK-4FLSD
Indoor unit
˚C
AM
PM
AM
PM
NOT AVAILABLE
ON / OFF
TEMP
PK-2.5FLD, PK-2.5FLD
PK-3FLD,
PK-3FLD
PK-4FLSD, PK-4FLSD
REMOTE CONTROLLER
Wall Mounted
[ Service Ref. ]
2000
PK-2.5FLD PK-2.5FLD
PK-3FLD
PK-4FLD
PK-2.5FLD
2
1
PK-3FLD
1
2
PK-4FLSD
1
2
2001
1
PK-2.5FLD
2
PK-3FLD
1
PK-3FLD
2
PK-4FLSD
1
PK-4FLSD
2
CONTENTS
1. TECHNICAL CHANGES·······················2
AND OUTDOOR UNITS········2
3. PART NAMES AND FUNCTIONS ········2
4. SPECIFICATIONS·································5
5. DATA ·····················································9
6. OUTLINES AND DIMENSIONS··········12
7. WIRING DIAGRAM·····························15
8. REFRIGERANT SYSTEM DIAGRAM ······16
9. OPERATION FLOW-CHART ··············17
10. MICROPROCESSOR CONTROL·······20
11. TROUBLESHOOTING ························29
12. DISASSEMBLY PROCEDURE ···········33
13. PARTS LIST········································36
14. OPTIONAL PARTS ·····························42
2000
No. OC232
REVISED EDITION-A
PK-P2.5FLD
, PK-P3FLD
,
1
1
PK-P4FLSD
, PK-P2.5FLD
,
1
2
PK-P3FLD
and PK-4FLSD
2
2
are added in REVISED
EDITION-A.
Please void OC232.
This manual does not cover
the following outdoor units.
When servicing them,
please refer to the service
manual No.OC127
REVISED EDITION-A,
OC187 and this manual in
a set.
[ Service Ref. ]
(OC127 REVISED
EDITION-A)
PU-2.5VJA
, PU-2.5NJA
,
2
1
PU-3NJA
, PU-4VLJSA
,
1
2
PU-4YJSA
, PU-4TJSA
3
2
(OC187)
PU-3VJC, PU-3YJC
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Related Manuals for Mitsubishi Electric PK-2.5FLD
Summary of Contents for Mitsubishi Electric PK-2.5FLD
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Page 1: Table Of Contents
[ Model names ] [ Service Ref. ] EDITION-A. 2000, 2001 2000 2001 Please void OC232. This manual does not cover PK-2.5FLD PK-2.5FLD PK-2.5FLD the following outdoor units. When servicing them, PK-2.5FLD please refer to the service manual No.OC127 PK-3FLD... -
Page 2: Technical Changes
TECHNICAL CHANGES PK-2.5FLD PK-2.5FLD PK-2.5FLD PK-2.5FLD PK-3FLD PK-3FLD PK-3FLD PK-3FLD PK-4FLSD PK-4FLSD PK-4FLSD PK-4FLSD NOSE has changed by changing its shape. The parts No. of REMOTE CONTROLLER has changed. (The following parts numbers are interchangeable.) BOX ASSEMBLY has changed by changing its shape. -
Page 3: Wireless Remote Controller
PK-2.5FLD, PK-3FLD, PK-4FLSD Part No. PK-2.5FLD , PK-3FLD , PK-4FLSD [ T7W 570 200 ] Wireless remote controller When cover is closed. display display SET TEMP. display indicates desired tempera- OPERATION MODE display ture set. Operation mode display indicates which opera- tion mode is in effect. - Page 4 PK-2.5FLD , PK-3FLD , PK-4FLSD Part No. Wireless remote controller [ T7W E06 714 ] When cover is open. display CHECK TEST RUN CHECK&TEST RUN display indicates that the unit is being checked or test-run. display display MODEL SELECT Blinks when model is selected.
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Page 5: Specifications
SPECIFICATIONS 1. STANDARD SPECIFICATION Service Ref. PK-2.5FLD PK-2.5FLD PK-2.5FLD Item Indoor, Outdoor D.B./W.B.°C 27/19.0°C, 35/24°C Condition Cooling (JIS B8616) Btu/h 23,900 24,400 22,700 Capacity w1 7,000 7,150 6,650 Total input w1 2.56 / 2.62 3.01 3.54 Service Ref. PK-2.5FLD PK-2.5FLD PK-2.5FLD... - Page 6 Service Ref. PK-3FLD PK-3FLD PK-3FLD Item Indoor, Outdoor D.B./W.B.°C 27/19.0°C, 35/24°C Condition Cooling (JIS B8616) Btu/h 27,000 28,400 23,500 Capacity w1 7,900 8,200 6,900 Total input w1 3.28 / 3.30 3.28 / 3.30 3.54 4.19 Service Ref. PK-3FLD PK-3FLD PK-3FLD Power supply(phase, cycle, voltage) Single, 50Hz, 220/240V Single, 60Hz, 220V...
- Page 7 Service Ref. PK-4FLSD PK-4FLSD PK-4FLSD Item Indoor, Outdoor D.B./W.B.°C 27/19.0°C, 35/24°C Condition Cooling (JIS B8616) 33,800 Btu/h 35,200 39,000 Capacity w1 10,300 11,400 9,900 Total input w1 3.46 / 3.63 3.40 / 3.47 4.38 5.08 Service Ref. PK-4FLSD PK-4FLSD PK-4FLSD Power supply(phase, cycle, voltage) Single, 50Hz, 220/240V Single, 60Hz, 220V...
- Page 8 2. POWER SUPPLY & MODEL NAMES Service Ref. (Outdoor unit) PK-2.5FLD PK-3FLD PK-4FLSD Power supply Service Ref. (Indoor unit) PK-2.5FLD PK-3FLD PK-4FLSD PK-2.5FLD PK-3FLD PK-4FLSD 1ph. 220,230,240V PU-2.5VJA PU-3VJC PU-4VLJSA 50Hz 3ph. 380/220,400/230,415/240V — PU-3YJC PU-4YJSA 1ph. 220V PU-2.5NJA PU-3NJA —...
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Page 9: Data
DATA 1. PERFORMANCE DATA COOLING CAPACITY 50Hz PK-2.5FLD PK-3FLD PK-4FLSD Service Ref. PK-2.5FLD PK-3FLD PK-4FLSD PK-2.5FLD PK-3FLD PK-4.5FLSD Temperature T.C. C.F . T.C. C.F . T.C. C.F . (T.I.) (T.I.) (T.I.) Outdoor D.B. Indoor W.B. (60.8°F) 0.81 0.81 10.4 0.81 (64.4°F) - Page 10 COOLING CAPACITY 60Hz PK-2.5FLD PK-3FLD PK-4FLSD PK-2.5FLD PK-3FLD PK-4FLSD Service Ref. PK-2.5FLD PK-3FLD PK-4FLSD Temperature T.C. C.F . T.C. C.F . T.C. C.F . (T.I.) (T.I.) (T.I.) Outdoor D.B. Indoor W.B. (60.8°F) 0.81 0.81 11.5 0.81 (64.4°F) 0.82 0.82 12.1 0.82...
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Page 11: Standard Operation Data
COOLING CAPACITY correction factors 50Hz Refrigerant piping length (one way) Service Ref. 5m (16ft) 10m (33ft) 15m (49ft) 20m (66ft) 25m (82ft) 30m (98ft) 35m (115ft) 40m (13ft) PK-2.5FLD 0.983 0.972 0.961 0.951 0.940 — — /1/2 PK-3FLD 0.978 0.962 0.948... -
Page 12: Outlines And Dimensions
4. OUTLET AIR SPEED AND COVERAGE RANGE Configuration Wall mounted PK-2.5FLD PK-3FLD PK-4FLSD Service Ref. PK-2.5FLD PK-3FLD PK-4FLSD PK-2.5FLD PK-3FLD PK-4FLSD Airflow /min Air speed m/sec. Coverage range m(ft) 12.4(41) 12.4(41) 15.3(50) Airflow /min Air speed m/sec. Coverage range m(ft) 12.4(41) - Page 13 2. INDOOR UNIT Unit : mm PK-2.5FLD PK-3FLD PK-2.5FLD PK-3FLD PK-2.5FLD PK-3FLD Front Right side 1400 Left side Knock out hole for right piping 1090 Air intake Refrigerant pipe. Drain pipe Terminal block for control Liquid pipe Knock out hole for...
- Page 14 PK-4FLSD Unit : mm PK-4FLSD PK-4FLSD Front Knock out hole for right piping Right side Left side 1680 1370 Air intake Knock out hole for left piping Terminal block for control Liquid pipe Terminal block for power supply Gas pipe Bolt Drain hose (Gas pipe)
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Page 15: Wiring Diagram
WIRING DIAGRAM PK-2.5FLD PK-3FLD PK-4FLD PK-2.5FLD PK-3FLD PK-4FLD PK-2.5FLD PK-3FLD PK-4FLD POWER SUPPLY ~(1 PHASE) AC220-240V 50Hz GRN/YLW AC220V 60Hz 10.6VAC 220V 230V 240V 14.5VAC CN4T FAN1 POWER TRANS TRANS REMOTE CONTROLLER CN6V VANE TO OUTDOOR UNIT CONNECTING WIRES DC12V... -
Page 16: Refrigerant System Diagram
Ball valve D.P.R. (with service port) Refrigerant pipe [ 9.52(3/8") (Discharge pressure regulator) (with heat insulator) option flow of refrigerant PK-2.5FLD, PK-2.5FLD , PK-2.5FLD / PU-2.5VJA , PU-2.5NJA PK-3FLD, PK-3FLD PK-3FLD / PU-3NJA PK-4FLSD, PK-4FLSD , PK-4FLSD... -
Page 17: Operation Flow-Chart
OPERATION FLOW-CHART 1. Main operation START POWER SUPPLY Live ON/OFF button ON Protection device Self hold reset STOP Abnormal operation mode Protection device Self hold POWER lamp ON Self-diagnostic function Indicate & Memory EMERGENCY <Note 3> ALL STOP <Note 4> MODE SELECT button COOL... -
Page 18: Cool Operation
2. COOL operation COOL operation 3 min. delay 6-minute Allowance time delay Coil frost Compressor start protection 6-minute time delay 3 minutes elapse check mode <Note 6> Coil frost Allowance set protection <Note 7> Range C Compressor start 10 minutes elapse Allowance release Pipe... -
Page 19: Dry Operation
3. DRY operation Dry operation <Note 8> Room temperature 18°C or below Compressor ON Compressor ON Compressor ON 3 min. delay 3 min. elapse <Note 5> <Note 5> Compressor Compressor thermostat ON thermostat ON Compressor OFF Compressor ON 10 minutes completed time completed <Note 9>... -
Page 20: Microprocessor Control
Self diagnostic troubleshooting. ˚C TEST RUN switching. CHECK mode switching. AUTO Vane setting. NOT AVAILABLE ON / OFF Indoor unit TEMP PK-2.5FLD, PK-2.5FLD PK-2.5FLD PK-3FLD, PK-3FLD PK-3FLD PK-4FLSD, PK-4FLSD PK-4FLSD INPUT from indoor unit INDOOR CONTROLLER BOARD Room temperature thermistor. -
Page 21: Not Available
NOTE: 1. Set temperature changes by 1 °C in the range 19-30 °C NOT AVAILABLE each TEMP button is pressed. ON / OFF 2. Set temperature is displayed on the LCD. TEMP PK-2.5FLD, PK-2.5FLD PK-2.5FLD PK-3FLD, PK-3FLD PK-3FLD PK-4FLSD, PK-4FLSD PK-4FLSD <COOL operation time chart>... - Page 22 5 Coil frost protection When the pipe temperature becomes - 15°C or below, coil frost protection will proceed as follows. <Start condition> After the compressor has been continuously operated for 3 minutes or more, and the pipe temperature has been - 15°C or below for 3 minutes, the coil frost protection will start.
- Page 23 NOT AVAILABLE NOTE: 1. Set temperature changes by 1 °C in the range 19-30 °C ON / OFF each TEMP button is pressed. 2. Set temperature is displayed on the LCD. TEMP PK-2.5FLD, PK-2.5FLD PK-2.5FLD PK-3FLD, PK-3FLD PK-3FLD PK-4FLSD PK-4FLSD, PK-4FLSD...
- Page 24 VANE AUTO START CHECK LOUVER VANE STOP START TEST RUN MIN. RESET CLOCK PK-2.5FLD, PK-2.5FLD PK-2.5FLD PK-3FLD, PK-3FLD PK-3FLD PK-4FLSD, PK-4FLSD PK-4FLSD 2-4 TIMER operation <How to operate> 1 Push POWER ON/OFF button. CHECK TEST RUN 2 Check if or not the current time is correct.
- Page 25 2-5 Test run Measure an impedance between the power supply terminal block and ground with a 500V Megger and check that it is equal to or greater than 1.0M". PK-2.5FLD, PK-2.5FLD (1) Turn on the main power of unit. PK-3FLD,...
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Page 26: On Off
2-6 Emergency operation When the remote controller or microprocessor malfunctions and no other trouble exists, emergency operation is available by setting the dip switch on the controller board. [Check items] (1) Make sure the compressor and the fans are running normally. (2) Locate the trouble with the self-diagnostic function.If the self- diagnostic function indicates that the protection device (such as coil frost protection) is functioning, the sources must be... - Page 27 SW1-4 ~ SW1-6) Switch for capacity of each model PK-2.5 PK-4 PK-3 4 5 6 4 5 6 SW1-7 ~ SW1-8) Switch for the pair number of wireless remote controller The pair number setting of the wireless remote controller is needed. (Refer to the next page for the details.) 2 SW2 (Unit switch) 1 2 3 4 5...
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Page 28: Pk-2.5Fld Pk-2.5Fld
2-8 Wireless remote controller pair number setting operation PK-2.5FLD, PK-2.5FLD PK-3FLD, PK-3FLD Switches are located on the indoor unit PC board and inside the remote con- PK-4FLSD, PK-4FLSD troller as shown. • Setting the SW1 (PC board inside indoor unit) Sub-switches 7 or 8 of SW1 can be used as foolws to assign a pair No. -
Page 29: Troubleshooting
TROUBLESHOOTING 1. Self-diagnostic function [for PK-2.5FLD , PK-3FLD , PK-4FLSD (1) Turn on the main power of the unit. Remove the battery cover on the back side of the (2) Set the adjusting switch on the back of wireless remote controller, display will start flashing the wireless remote controller to “Set”... - Page 30 1. Self-diagnostic function [for PK-2.5FLD , PK-3FLD , PK-4FLSD 1 Turn on the main power to the unit. CHECK 2 Press the button twice continuously. • begins to light and refrigerant address display “00” begins to bink. • Start this operation from the status of remote controller display turned off 3 While pointing the remot controller toward the unit’s receiver, press the...
- Page 31 Check Diagnosis of malfunction Cause Check points code Abnormality of room temper- 1) Bad contact of thermistor 1) Check the thermistor. ature thermistor (RT1) 2) Damaged thermistor 2) Measure the resistance of the thermistor. Normal resistance should be as follows. 0: ···15kΩ...
- Page 32 5. How to check the parts Parts name Check points Room temperature Disconnect the connector, then measure the resistance using a tester. thermistor (RT1) (Surrounding temperature 10°C~30°C) Pipe temperature thermistor (RT2) Normal Abnormal 4.3k ~9.6k Open or short Transformer Disconnect the connector and measure the resistance using a tester. CN4T Normal Abnormal...
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Page 33: Disassembly Procedure
DISASSEMBLY PROCEDURE PK-4FLSD, PK-4FLSD , PK-4FLSD OPERATING PROCEDURE PHOTOS & ILLUSTRATION 1. Removing the lower side of the indoor unit from the instal- lation plate Figure 1 (1) Remove the 2 screws. Hanger of indoor unit Hang the indoor unit hangers to the catches on the instal- lation plate. - Page 34 OPERATING PROCEDURE PHOTOS & ILLUSTRATION (9) Remove the screws of the indoor controller board case, Photo 3 and pull out the indoor controller board case. Relay Then the transformer and the capacitor and relay is accessible. Transformer Capacitor Indoor controller board case Electrical box 5.
- Page 35 OPERATING PROCEDURE PHOTOS 8. Removing the lineflow fan and the fan motor Photo 7 (1) Remove the left and right side panels. (2) Remove the grille. (3) Remove the electrical box. Screw Lineflow fan (4) Remove the drain pan. (5) Loosen the screw that fixes the lineflow fan to the fan Fan motor motor.
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Page 36: Parts List
PARTS LIST STRUCTURAL PARTS PK-2.5FLD PK-3FLD PK-2.5FLD PK-3FLD PK-2.5FLD PK-3FLD Part number that is circled is not shown in the figure. Q'ty/set Price Wiring Recom- PK-2.5 PK-3 Remarks. Specification Diagram mended Part No. Part name (Drawing No.) Unit Amount Symbol... - Page 37 STRUCTURAL PARTS PK-4FLSD PK-4FLSD PK-4FLSD Part number that is circled is not shown in the figure. Q'ty/set Price Wiring Recom- PK-4 Remarks. Specification Diagram mended Part No. Part name (Drawing No.) Unit Amount Symbol Q'ty FLSD FLSD FLSD R01 12G 661 RIGHT SIDE PANEL R01 12G 662 LEFT SIDE PANEL...
- Page 38 ELECTRICAL PARTS PK-2.5FLD PK-3FLD PK-2.5FLD PK-2.5FLD PK-3FLD PK-2.5FLD PK-3FLD PK-2.5FLD PK-3FLD PK-3FLD PK-2.5FLD PK-3FLD 27 28 Q'ty/set Price Wiring Recom- PK-2.5 PK-3 Remarks. Specification Diagram mended Part No. Part name (Drawing No.) Unit Amount Symbol Q'ty FLD FLD R01 12G 220...
- Page 39 Q'ty/set Price Wiring Recom- PK-2.5 PK-3 Remarks. Specification Diagram mended Part No. Part name (Drawing No.) Unit Amount Symbol Q'ty R01 Z61 102 BEARING MOUNT R01 KV5 102 BEARING MOUNT — BEARING BAND (BG02L462H02) — CENTER SUPPORT (BG25A543H07) — CENTER SUPPORT (BG00R259G07) T7W 12G 529 DRAIN PAN...
- Page 40 ELECTRICAL PARTS PK-4FLSD PK-4FLSD PK-4FLSD PK-4FLSD PK-4FLSD PK-4FLSD 27 28 Q'ty/set Price Wiring Recom- PK-4 Remarks. Specification Diagram mended Part No. Part name (Drawing No.) Unit Amount Symbol Q'ty FLSD FLSD FLSD FAN MOTOR T7W 571 762 RUBBER MOUNT R01 16G 105 MOTOR BAND (BG02H065H01) —...
- Page 41 Q'ty/set Price Wiring Recom- PK-4 Remarks. Part No. Specification Diagram mended Part name (Drawing No.) Unit Amount Symbol Q'ty FLSD FLSD FLSD R01 Z61 102 BEARING MOUNT R01 KV5 102 BEARING MOUNT — BEARING BAND (BG02L462H02) — CENTER SUPPORT (BG25A543H07) —...
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Page 42: Optional Parts
OPTIONAL PARTS 1. REFRIGERANT PIPES Service Ref. : PK-2.5FLD, PK-2.5FLD , PK-2.5FLD PK-3FLD, PK-3FLD PK-3FLD Part No. PAC-05FFS-E PAC-07FFS-E PAC-10FFS-E PAC-15FFS-E Pipe length Liquid:{9.52 Gas:{15.88 Pipe size O.D. Indoor unit:Flared Outdoor unit:Flared Connection methed Service Ref. : PK-4FLSD, PK-4FLSD , PK-4FLSD Part No. - Page 43 D U A L C E N T R A L O P E R A T I O N CENTRAL MITSUBISHI ELECTRIC 10 9 8 7 6 5 4 3 2 1 1 1 7 4-2 Names and Functions POWER ON/OFF switch "ENGAGED"...
- Page 44 4-3 Connection method (1) Connections in the power supply cord. 1. Connect the power supply cord to the power supply terminal-block and fix it in-place with a tie-wrap. Connect a sin- gle phase 200V AC (220, 230, 240V) to is the GND terminal, be sure to ground the earth wire. 2.
- Page 45 5. PROGRAM TIMER ADAPTER This adapter is needed when a program timer(PAC-SK65PT)or a centralized remote controller(PAC-805RC)is used. Part No PAC-825AD 5-1 Parts included 1 ADAPTER··························1P 2 3-core cable···························1P 3 3-core cable···························1P Length : 2m(6' 7") Length : 2m(6' 7") 4 4-core cable···························1P 5 5-core cable···························1P Length : 2m(6' 7") Length : 2m(6' 7")
- Page 46 (2) Set the address number (from SW1-1 to SW1-6) in the dip switch when a centralized remote controller is being used. The address is the control number of each unit in the centralized control system. As the address serves as a time-delay Levers No.
- Page 47 6. TIMER Model Name PAC-SK65PT Product Name Program timer (The PAC-SK65PT can only be used together with the PAC-825AD) 6-1 Program timer specifications Product name Program Timer Model name. PAC-SK65PT Mounting method Wall mount Clock system Quarts clock + 50 second/month Clock accuracy Liquid crystal display Time...
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Page 48: Drain Pump
Model Name PAC-SE89DM-E HEAD OFFICE : MITSUBISHI DENKI BLDG., 2-2-3, MARUNOUCHI, CHIYODA-KU TOKYO 100-8310, JAPAN © Copyright 2000 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD. New publication, effective Sep. 2001 Distributed in Sep. 2001. No.OC232 REVISED EDITION-A 980 Specifications subject to change without notice Issued in Aug.