Mitsubishi Electronics PLFY-P18 manual

TECHNICAL & SER VICE MANUAL Indoor unit [Model names] [Service Ref.] PLFY -P12NBMU-E PLFY -P15NBMU-E PLFY -P18NBMU-E PLFY -P24NBMU-E PLFY -P30NBMU-E PLFY -P36NBMU-E No. OCH421 REVISED EDITION-A CONTENTS 1. TECHNICAL CHANGES ......................... 2 2. FEA TURES ............................................. 2 3. P ART NAMES AND FUNCTIONS ....[...]

2 2 FEA TURES 4. i-see Sensor (OPTIONAL CORNER P ANEL) The i see sensor is a radiation temperature sensor originated from Mitsubishi’s new technology . In order to create a really comfortable space in shops and offices, it is essential to control the temperature near the floor where occupants/visitors gather . The i see sensor measures the infrar[...]

3 3 P ART NAMES AND FUNCTIONS Drain pipe Filter Va n e Gas pipe Liquid pipe Air outlet i-see sensor (option) Air intake (Intake grille) Indoor unit P AR-21MAA ON/OFF FIL TER CHECK OPERA TION CLEAR TEST TEMP . MENU BACK DA Y MONITOR/SET CLOCK ON/OFF Operation Section T emperature setting buttons Down Up Timer Menu button (Monitor/Set button) Mode bu[...]

4 ● ● °F°C °F°C ERROR CODE AFTER TIMER TIME SUN MON TUE WED THU FRI SA T ON OFF Hr AFTER FIL TER FUNCTION ONL Y1Hr. WEEKL Y SIMPLE AUTO OFF Note: “PLEASE W AIT” message This message is displayed for approximately 3 minutes when power is supplied to the indoor unit or when the unit is recovering from a power failure. “NOT A V AILABLE?[...]

5 4-1. SPECIFICA TIONS 4 SPECIFICA TIONS *1 Nominal cooling conditions Note: *2 Nominal heating conditions Unit converter Indoor : 80degF D.B. / 67degF W .B. kcal/h = kW × 860 (26.7degC D.B. / 19.4degC W .B.) 70degF D.B. (21.1degC D.B.) BTU/h = kW × 3,412 Outdoor : 95degF D.B. 47degF D.B. / 43degF W .B. cfm = m 3 /min × 35.31 (35degC D.B.) (8.3d[...]

6 *1 Nominal cooling conditions Note: *2 Nominal heating conditions Unit converter Indoor : 80degF D.B. / 67degF W .B. kcal/h = kW × 860 (26.7degC D.B. / 19.4degC W .B.) 70degF D.B. (21.1degC D.B.) BTU/h = kW × 3,412 Outdoor : 95degF D.B. 47degF D.B. / 43degF W .B. cfm = m 3 /min × 35.31 (35degC D.B.) (8.3degC D.B. / 6.1degC W .B.) lbs = kg/0.45[...]

7 4-2. SOUND LEVEL * Measured in anechoic room. PLFY -P-NBMU-E PLFY -P12NBMU-E PLFY -P12NBMU-ER1 PLFY -P15NBMU-E PLFY -P15NBMU-ER1 PLFY -P18NBMU-E PLFY -P18NBMU-ER1 PLFY -P24NBMU-E PLFY -P24NBMU-ER1 PLFY -P30NBMU-E PLFY -P30NBMU-ER1 PLFY -P36NBMU-E PLFY -P36NBMU-ER1 27-28-29-31 27-28-30-31 28-29-30-32 28-30-32-34 30-32-35-37 35-38-41-43 Sound level[...]

8 4-4. ELECTRICAL P ARTS SPECIFICA TIONS Parts name Service Ref. Symbol TH21 TH22 TH23 FUSE MF MV DP FS LEV TB2 TB5 TB15 Resistance 30 " F/15.8k  , 50 " F/9.6k  , 70 " F/6.0k  , 80 " F/4.8k  , 90 " F/3.9k  , 100 " F/3.2k  Resistance 30 " F/15.8k  , 50 " F/9.6k  , 70 " F/6.0k  ,[...]

9 5 4-W A Y AIR FLOW SYSTEM 5-1. PLACEMENT OF THE AIR OUTLETS • For this grille, the blowout direction comes in 1 1 patterns. Also, by setting the remote controller to the appropriate settings, you can adjust the air flow and speed. Select the settings from T able1 according to the location in which you want to install the unit. 1) Decide on the [...]

10 CN51 Multiple remote controller adapter P AC-SA88HA-E Indoor controller board Distance between indoor controller board and relay must be within 10m (33ft). Be sure to secure insulation material by tape, etc. 5 Green Y ellow Orange Connector (5P) Indoor unit side Multiple remote controller adapter P AC-SA88HA-E Be sure to secure insulation materi[...]

11 2 - inlet 1 - inlet 2 - inlet 1 - inlet 2 - inlet 1 - inlet -200(-80) -150(-60) -100(-40) -50(-20) 0 50(20) 01 2 50 100 150 200 [CFM] 34 5 6 [CMM] 2 - inlet 1 - inlet Air flow rate Static pressure [Pa(in.W.G. % 10 -2 )] -200(-80) -150(-60) -100(-40) -50(-20) 0 50(20) 01 2 50 100 150 200 [CFM] 34 5 6 [CMM] Static pressure [Pa(in.W.G. % 10 -2 )] -[...]

12 6 OUTLINES AND DIMENSIONS 14-27/32 11-3/16 2-3/8 +5 0 +35 -5 (187.5) (160) (160) (7.5) (950) (500) Keep 25/64(10) to 19/32(15) between unit ceiling and ceiling slab. Note: 1. Please choose the Grille from a standard grille. 2. As for drain pipe, please use VP-25 (O.D. : 1-1/4( : 32) PVC TUBE.) Drain pump is included. Max. lifting height is 70-7/[...]

13 WIRING DIAGRAM 7 PLFY -P12NBMU-E(R1) PLFY -P15NBMU-E(R1) PLFY -P18NBMU-E(R1) PLFY -P24NBMU-E(R1) PLFY -P30NBMU-E(R1) PLFY -P36NBMU-E(R1) CN27 CN32 CN51 CN52 SW2 SW3 SW4 SWE ZNR01,02 DSA FUSE X1 LED1 LED2 MF MV DP FS TB2 TB5 TB15 TH21 TH22 TH23 LEV SW1 SW11 SW12 SW14 SWA SWB SWC W.B RU BZ LED1 LED2 SW1 SW2 POWER SUPPLY TRANSMISSION MA-REMOTE CONT[...]

14 8 REFRIGERANT SYSTEM DIAGRAM Refrigerant flow in cooling Refrigerant flow in heating Strainer (#100mesh) Strainer (#100mesh) Strainer1 (#50mesh) Strainer2 (#100mesh) Heat exchanger Room temparature thermistor TH21 Gas pipe thermistor TH23 Liquid pipe thermistor TH22 Linear expansion valve Gas pipe Liquid pipe Flare connection Gas pipe Liquid pip[...]

15 MICROPROCESSOR CONTROL 9 PAR-21MAA ON/OFF FILTER CHECK OPERA TION CLEAR TEST TEMP . MENU BACK DA Y MONITOR/SET CLOCK ON/OFF ûF ûC ûF ûC ERROR CODE AFTER TIMER TIME SUN MON TUE WED THU FRI SAT ON OFF Hr AFTER FILTER FUNCTION ONLY1Hr . WEEKLY SIMPLE AUTO OFF INDOOR UNIT CONTROL 9-1. COOL OPERA TION <How to operate> 1 Press POWER ON/OFF b[...]

16 → Control modes Control details 3-1. Drain pump control •Always drain pump ON during the COOL and DRY mode operation. (Regardless of the thermo ON/OFF) •When the operation mode has changed from the COOL or DRY to the others (including Stop), OFF the control after the drain pump ON for 3 minutes. Float switch control • Float switch contro[...]

17 Control modes Control details 1-1. Thermo regulating function (Function to prevent restarting for 3 minutes) Setting the Dry thermo by the thermo regulating signal and the room temperature (TH21). Dry thermo ON Room temperature   desired temperature + 2°F Dry thermo OFF Room temperature  desired temperature 1-2. Frozen prevention[...]

18 Control modes Control details Set by remote controller . When [Auto] is set, fan speed becomes [Low]. 2. Drain pump Remarks 1. Fan Ty p e Fan speed notch 4 speeds + Auto type [Low], [Med2], [Med1], [High], [Auto] 3. V ane (up/down vane change) 2-1. Drain pump control The drain pump turns ON for the specified amount of time when any of the follow[...]

19 Control modes Control details 1-1. Thermoregulating function (Function to prevent restarting for 3 minutes) • Room temperature  desired temperature -2°F ···Thermo ON • Room temperature   desired temperature ···Thermo OFF 1. Thermoregulating function Remarks 2-1. Hot adjust mode The fan controller becomes the hot adjuste[...]

20 → Control modes Control details 2. Fan Remarks 2-3. Thermo OFF mode When the thermoregulating function changes to OFF , the indoor fan operates in [Extra low]. 2-4. Heat defrosting mode The indoor fan stops. (1) Initial setting: OFF → HEA T···[last setting] When the last setting is [Swing] ··· [Downward D] When changing the mode from e[...]

21 1. Drain pump Control modes Control details HEA T mode for room temperature < Desired temperature COOL mode for room temperature Desired temperature (1) HEA T mode → COOL mode Room temperature Desired temperature + 3°F . or 3 min. has passed (2) COOL mode → HEA T mode Room temperature  Desired temperature - 3°F . or 3 min. has passed[...]

22 10 TROUBLESHOOTING 10-1. HOW TO CHECK THE P ARTS PLFY -P12/15/18/24/30/36NBMU-E PLFY -P12/15/18/24/30/36NBMU-ER1 Parts name Check points Disconnect the connector then measure the resistance using a tester . (At the ambient temperature 50 " F~86 " F) (Refer to the next page for a detail.) Room temperature thermistor (TH21) Liquid pipe t[...]

23 4 : 4 3 6 5 : 3 2 : 2 1 : 1 : 4 : 3 : 2 : 1 Controller board Drive circuit Connector(CN60) DC12V Brown Red Blue Orange Y ellow White M 4 6 2 3 5 1 Blue Brown Y ellow Orange Red White Linear expansion valve <Thermistor characteristic graph> Room temperature thermistor (TH21) Liquid pipe temperature thermistor (TH22) Gas pipe temperature the[...]

24 Output (Phase) Output { 1 1 ON { 2 ON { 3 OFF { 4 OFF 2 OFF ON ON OFF 3 OFF OFF ON ON 4 ON OFF OFF ON <Output pulse signal and the valve operation> 2 Linear expansion valve operation 3 T rouble shooting D A E B C Open Open Extra tightening (200~800 pulse) Pulse number Outdoor unit R410A model : 1400 pulse Outdoor unit R22 model : 2000 puls[...]

25 Notes · High voltage is applied to the connecter (CNMF) for the fan motor . Pay attention to the service. · Do not pull out the connector (CNMF) for the motor with the power supply on. (It causes trouble of the indoor controller board and fan motor) Self check Conditions : The indoor fan cannot turn around. No Wiring contact check Contact of f[...]

26 SW3-5 Note : + 4 SW3-5,6 SW3-6 V ane setting Initial setting ● Setting V ane position OFF OFF Set up  Standard Standard ON OFF Set up  Less draft * Upward position than the standard OFF ON Set up  Less smudging Downward position than the standard ON ON unused — — * Be careful of the smudge on ceiling. Switch Function Remarks Effec[...]

27 0 5 9 4 8 3 7 2 6 1 0 5 9 4 8 3 7 2 6 1 0 5 9 4 8 3 7 2 6 1 0 5 9 4 8 3 7 2 6 1 0 8 F 7 E 6 D 5 C 4 B 3 A 2 9 1 0 8 F 7 E 6 D 5 C 4 B 3 A 2 9 1 Switch SW A Ceiling height selector SWB Discharge outlet number selector SWC Option selector Rotary switch Rotary switch SW14 Branch No. setting SW1 1 1s digit address setting SW12 10ths digit address se[...]

28 J41, J42 Wireless remote controller Pair No. SWE T est run for Drain pump Connector Jumper Drain pump and fan are activated simultaneously after the connector SWE is set to ON and turn ON the power . The connector SWE is set to OFF after test run. <Initial setting> Pattern A <Initial setting> SWE SWE OFF ON SWE OFF ON OFF ON Under op[...]

29 10-3. TEST POINT DIAGRAM 10-3-1. Indoor controller board PLFY -P12/15/18/24/30/36NBMU-E PLFY -P12/15/18/24/30/36NBMU-ER1 CN52 Remote indicator CN51 Centrally controlled CN4Y i-See sensor CN2M Connect to the terminal block (TB5) (M-NET transmission connecting wire) 24-30VDC (non-polar) CN3A Connect to the terminal block (TB15) (MA-Remote controll[...]

30 10-3-2. Circuit board PLFY -P12NBMU-E(R1) PLFY -P15NBMU-E(R1) PLFY -P18NBMU-E(R1) PLFY -P24NBMU-E(R1) PLFY -P30NBMU-E(R1) PLFY -P36NBMU-E(R1) SW1 Function setting SW A Ceiling height selector SWB Discharge outlet number selector SW12 Address setting 2nd digit SW1 1 Address setting 1st digit SWC Option selector[...]

31 11 DISASSEMBL Y PROCEDURE PLFY -P12NBMU-E(R1) PLFY -P15NBMU-E(R1) PLFY -P18NBMU-E(R1) PLFY -P24NBMU-E(R1) PLFY -P30NBMU-E(R1) PLFY -P36NBMU-E(R1) Be careful when removing heavy parts. OPERA TING PROCEDURE PHOTOS & ILLUSTRA TIONS 1. Removing the air intake grille (1) Slide the knob of air intake grille toward the arrow 1 to open the air intak[...]

32 OPERA TING PROCEDURE PHOTOS & ILLUSTRA TIONS 7. Removing the panel (1) Remove the air intake grille and the filter . (See Figure 1) (2) Disconnect the connector CNV (White/20P). Corner panel (See Figure 2) (3) Remove the corner screw . (4) Slide the corner panel to the direction of the arrow 1 , and remove the corner panel. Panel (See Photo [...]

33 OPERA TING PROCEDURE PHOTOS & ILLUSTRA TIONS 10 Removing the drain pump (DP) and float switch (FS) (1) Remove the drain pan. (See Photo 6) (2) Cut the hose band and remove the hose. (3) Remove the drain pump assembly (3 screws and 2 hooks). (4) Remove the drain pump (3 screws). (5) Remove the float switch (2 screws). Photo 8 Photo 9 Drain pu[...]

34 OPERA TING PROCEDURE PHOTOS & ILLUSTRA TIONS 1 1. Removing the heat exchanger (1) Remove the drain pan. (See Photo 6) (2) Remove the 3 screws of the piping cover , and pull out piping cover . (3) Remove the 2 screws of coil plate. (4) Remove the 2 screws of the coil. (5) Remove the screw of the coil support. (6) Pull out the heat exchanger .[...]

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c Copyright 2007 MITSUBISHI ELECTRIC ENGINEERING CO., L TD. Distributed in Nov . 2008 No. OCH421 REVISED EDITION-A PDF 7 Distributed in Jul. 2007 No. OCH421 PDF 9 Made in Japan New publication, effective Nov . 2008 Specifications subject to change without notice HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU TOKYO 100-8310, JAP AN TM[...]