background image

23

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

2

Linear expansion valve operation

3

3

Trouble shooting

D

A

E

B

C

Open

Extra tightning (80~100pulse)

Pulse number

2000 pulse
Opening a valve
all the way

Close

V

a

lve position (capacity)

6
5
4
3
2
1

LED

1k

"

Symptom

Check points

Operation circuit fail-
ure of the micro
processor.

Disconnect the connector on the controller board, then con-
nect LED for checking.

Pulse signal will be sent out for 10 seconds as soon as the
main switch is turn on.  If there is LED with lights on or lights
off, it means the operation circuit is abnormal.

Countermeasures

Exchange the indoor con-
troller board at drive circuit
failure.

Linear expansion
valve mechanism is
locked.

Valve doesn't close
completely (thermis-
tor leaking).

Wrong connection of
the connector or
contact failure.

To check the linear expansion valve, operate the indoor unit
in fan mode and at the same time operate other indoor units
in cooling mode, then check the pipe temperature  <liquid

pipe temperature> of the indoor unit by
the outdoor multi controller board opera-
tion monitor.  During fan operation, linear
expansion valve is closed completely and
if there are some leaking, detecting tem-
perature of the thermistor will go lower. If
the detected temperature is much lower
than the temperature indicated in the

remote controller, it means the valve is not closed all the way.
It is not necessary to exchange the linear expansion valve, if
the leakage is small and not making any trouble.

Thermistor

(Liquid pipe)

Linear

expansion

valve

Motor will idle and make ticking noise when motor is operated
while the linear expansion valve is locked.  This ticking sound
is the sign of the abnormality.

Check the color of lead wire and missing terminal of the con-
nector.

Exchange the linear
expansion vale.

Exchange the linear
expansion valve.

If large amount of thermis-
tor is leaked, exchange the
linear expansion valve.

Disconnect the connector
at the controller board,
then check the continuity.

Measure the resistance between the each coil (red-white,
red-orange, brown-yellow, brown-blue) using a tester.  It is
normal if the resistance is in the range of 

Short or breakage of
the motor coil of the
linear expansion
valve.

Closing a valve : 1 

→ 

→ 

→ 

→ 

1

Opening a valve : 4 

→ 

→ 

→ 

→ 

4

The output pulse shifts in above order.

❈ 

1. When linear expansion valve operation stops, all output phase

become OFF.

2. At phase interruption or when phase does not shift in order,

motor does not rotate smoothly and motor will lock and vibrates.

❈ 

When the switch is turned on, 2200 pulse closing valve signal
will be send till it goes to 

A

point in order to define the valve 

position.

When the valve moves smoothly, there is no noise or vibration
occurring from the linear expansion valve : however, when the
pulse number moves from 

E

to 

A

or when the valve is locked,

more noise can be heard than normal situation.

❈ 

Noise can be detected by placing the ear against the screw driver
handle while putting the screw driver to the linear expansion valve.

150

'

10%.

OC340A--1.qxp  06.7.25 0:39 PM  Page 23

Summary of Contents for City Multi Series PLFY-P12NAMU-E

Page 1: ...DIMENSIONS 11 6 WIRING DIAGRAM 12 7 REFRIGERANT SYSTEM DIAGRAM 13 8 MICROPROCESSOR CONTROL 14 9 TROUBLE SHOOTING 21 10 DISASSEMBLY PROCEDURE 26 11 PARTS LIST 29 12 RoHS PARTS LIST 32 13 OPTIONAL PARTS...

Page 2: ...eating capacity PLFY P12NAMU E 12 000 13 500 Btu h PLFY P15NAMU E 15 000 17 000 Btu h PLFY P18NAMU E 18 000 20 000 Btu h PLFY P24NAMU E 24 000 27 000 Btu h PLFY P30NAMU E 30 000 34 000 Btu h PLFY P36N...

Page 3: ...DAY MONITOR SET CLOCK ON OFF Set Temperature buttons Down Up Timer Menu button Monitor Set button Mode button Return button Set Time buttons Back Ahead Timer On Off button Set Day button Opening the d...

Page 4: ...n prohib ited by a master controller Timer Is Off indicator Indicates that the timer is off Temperature Setting Shows the target temperature Day of Week Shows the current day of the week Time Timer Di...

Page 5: ...P18NAMU E PLFY P24NAMU E PLFY P30NAMU E PLFY P36NAMU E 12 000 13 500 0 14 0 14 0 68 0 68 390 420 460 490 350 380 410 440 24 27 28 30 18 000 20 000 0 14 0 14 0 68 0 68 490 530 570 640 470 500 530 600...

Page 6: ...0 0002 MICRO BAR BAND CENTER FREQUENCIES Hz PLFY P18NAMU E High Medium1 Medium2 Low NOTCH 33 31 28 27 SPL dB LINE 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8000 APPROXIMATE THRESHOLD O...

Page 7: ...E LEVEL dB re 0 0002 MICRO BAR BAND CENTER FREQUENCIES Hz PLFY P36NAMU E High Medium1 Medium2 Low NOTCH 44 43 40 37 SPL dB LINE 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8000 APPROXIMAT...

Page 8: ...6 pole OUTPUT 110W D176P110MS Inner thermostat OPEN 266 F i 9_F 6 pole OUTPUT 70W D17D6P70MS MSBPC20M13 DC12V 300 phase PLD 12220ME 2 INPUT 12 10 8W 24R Hr Thermistor resistance 30_F 6 3k 50_F 3 9k 7...

Page 9: ...r intake hole Fresh air intake hole diagram Unit inch 3 1 8 Burring hole 4 29 32 Burring hole pitch 3 15 16 Cut out hole Refrigerant pipe Drain pipe Ceiling surface 120_ 1 2 0 _ w6 7 32 4 3 INTERLOCKI...

Page 10: ...ultifunction casement High efficiency filter Taking air into the unit Multifunction casement Standard filter Multifunction casement High efficiency filter Taking air into the unit 4 4 FRESH AIR INTAKE...

Page 11: ...M10 Drain hole Vane motor M M M M Air intake hole Air outlet hole Air outlet hole 6 1 4 159 25 32 1 25 32 20 45 25 32 1 25 32 20 45 6 1 4 159 1 26 23 13 16 605 33 27 32 35 13 16 860 910 33 1 16 840 D...

Page 12: ...RED RED ORN YLW WHT BLU RED P B 2 1 2 1 10 0 0 0 1 2 w2 Use Copper Supply Wire w2 TERMINAL BLOCK SYMBOL A B SW1 SW5 SW11 SW12 SW14 SWA SWB SWC SWITCH CN24 CN25 CN27 CN32 CN51 CN52 F C FUSE SW2 SW3 SW4...

Page 13: ...r TH22 Linear expansion valve Gas pipe Liquid pipe Flare connection Refrigerant flow in cooling Refrigerant flow in heating PLFY P12NAMU E PLFY P24NAMU E PLFY P15NAMU E PLFY P30NAMU E PLFY P18NAMU E P...

Page 14: ...nutes Room temperature desired temperature 2 F Thermo ON Room temperature desired temperature Thermo OFF 1 2 Anti freezing control Detected condition When the liquid pipe temp TH22 is 32 F or less in...

Page 15: ...or temperature rise t Temperature of drain sensor before current is applied T0 Temperature of drain sensor after current is applied T1 t T1 T0 1 Initial setting Start at COOL mode and horizontal vane...

Page 16: ...OFF time min Less than 64 F Over 64 F ON OFF T1 83 F 83 F T1 79 F 79 F T1 75 F 75 F T1 Unconditional 9 3 7 3 5 3 3 3 10 3 Dry thermo OFF 2 Fan Note Remote controller setting is not acceptable Dry the...

Page 17: ...ther 6 minutes 2 2 Liquid level detection method The liquid level is detected by determining whether or not the drain sensor is submerged based on the amount the temperature rises after self heating t...

Page 18: ...rminating the hot adjuster mode A C B Extra Low Low Set fan speed by the remote controller Hot adjuster mode 1 2 2 Preheating exclusion mode When the condition changes the auxiliary heater ON to OFF t...

Page 19: ...ates for 3 minutes 1 Initial setting OFF HEAT last setting When changing the mode from exception of HEAT to HEAT operation Downward C 2 Vane position Horizontal Downward A Downward B Downward C Swing...

Page 20: ...n turned ON for 6 minutes the drain pump is kept ON for a further 6 minutes 1 2 Liquid level detection method The liquid level is detected by determining whether or not the drain sensor is submerged b...

Page 21: ...e next page for a detail Refer to the next page for a detail Room temperature thermistor TH21 Liquid pipe thermistor TH22 Gas pipe thermistor TH23 1 2 Red Red 1 2 3 Normal 4 3k 9 6k Abnormal Open or s...

Page 22: ...Thermistor for lower temperature Linear expansion valve 1 1 Operation summary of the linear expansion valve Linear expansion valve open close through stepping motor after receiving the pulse signal f...

Page 23: ...osed all the way It is not necessary to exchange the linear expansion valve if the leakage is small and not making any trouble Thermistor Liquid pipe Linear expansion valve Motor will idle and make ti...

Page 24: ...4degrees up Superheat setting temperature w6 Sub cool setting temperature Heat pump Not available Not available Not available First setting Down B C Not effective Effective 2degrees 10degrees 1 2 3 4...

Page 25: ...lti function casement to the unit be sure to attach it to the option side in order to prevent the airflow reducing This is the switch to be used when the indoor unit is operated with R2 series outdoor...

Page 26: ...screws to remove the box Electrical parts in the electrical box Indoor controller board power supply board Terminal block Power supply Terminal block Transmission Terminal block MA remote controller...

Page 27: ...anel a little to remove the screws Slide the panel so that the screw comes to a large diameter of the oval hole which has two different diameters Photo 6 Photo 5 Photo 4 4 Remove the fan motor 1 Remov...

Page 28: ...t 9 Remove the 2 screws of the coil 10 Pull out the heat exchanger 8 Removing the drain pump and drain sensor 1 Remove the panel See photo 5 2 Remove the bell mouth See photo 1 3 Remove the electrical...

Page 29: ...ecification Q ty set Price Unit Amount Remarks Drawing No Wiring Diagram Symbol Recom mended Q ty PLFY P 12 15 18 24 30 36 NAMU E T7W E12 003 T7W E05 002 T7W E01 638 R01 E03 638 R01 E00 500 R01 E00 69...

Page 30: ...UBBER MOUNT No Part No Part Name Specification Q ty set Price Unit Amount Remarks Drawing No Wiring Diagram Symbol Recom mended Q ty PLFY P NAMU E 12 18 1 1 1 1 1 1 1 1 4 15 1 1 1 1 1 1 1 1 4 24 1 1 1...

Page 31: ...ER POWER BOARD CONTROLLER BOARD ROOM TEMPERATURE THERMISTOR ADDRESS BOARD ADDRESS CABLE TERMINAL BLOCK TERMINAL BLOCK TERMINAL BLOCK CAPACITOR CAPACITOR DRAIN PLUG DRAIN PLUG LEAD ASSY F M 2P 1 2 3P M...

Page 32: ...Name Specification Q ty set Price Unit Amount Remarks Drawing No Wiring Diagram Symbol Recom mended Q ty PLFY P 12 15 18 24 30 36 NAMU E T7W E18 003 T7W E09 002 T7W E02 638 R01 E14 638 R01 E13 500 R0...

Page 33: ...G G G G G G G G G G G G G G RoHS Part No Part Name Specification Q ty set Price Unit Amount Remarks Drawing No Wiring Diagram Symbol Recom mended Q ty PLFY P NAMU E 12 18 1 1 1 1 1 1 1 1 4 15 1 1 1 1...

Page 34: ...LER BOARD ROOM TEMPERATURE THERMISTOR ADDRESS BOARD ADDRESS CABLE TERMINAL BLOCK TERMINAL BLOCK TERMINAL BLOCK CAPACITOR CAPACITOR DRAIN PLUG DRAIN PLUG LEAD ASSY F M 2P 1 2 3P M1 M2 S 3P L1 L2 GR 3 0...

Page 35: ...TIONAL PARTS 13 13 1 MULTI FUNCTION CASEMENT Part No PAC SG03TM E 13 2 AIR OUTLET SHUTTER PLATE 20 SETS Part No PAC SG06SP E 13 3 HIGH EFFICIENCY FILTER ELEMENT PAC SG03TM E IS REQUIRED Part No PAC SG...

Page 36: ...ibuted in Aug 2006 No OC340 REVISED EDITION A PDF 9 Distributed in Jun 2005 No OC340 PDF 10 Made in Japan New publication effective Aug 2006 Specifications subject to change without notice HEAD OFFICE...

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