Mitsubishi Electric City Multi PKFY-P06NAMU-E Operating manual

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
TECHNICAL & SERVICE MANUAL
[Models]
PKFY-P06NAMU-E
PKFY-P08NAMU-E
PKFY-P12NGMU-E
PKFY-P15NGMU-E
PKFY-P18NFMU-E
PKFY-P24NFMU-E
PKFY-P30NFMU-E
No. OC342
REVISED EDITION-C
CONTENTS
1. DIFFERENCES.....................................2
2. FEATURES............................................ 3
3. PART NAMES AND FUNCTIONS........6
4. SPECIFICATION...................................9
5. OUTLINES AND DIMENSIONS.......... 16
6. WIRING DIAGRAM.............................20
7. REFRIGERANT SYSTEM DIAGRAM....
22
8. MICROPROCESSOR CONTROL....... 23
9. TROUBLESHOOTING........................30
10. DISASSEMBLY PROCEDURE...........39
11. PARTS LIST........................................48
12. RoHS PARTS LIST............................. 56
May 2009
R410A / R22
PKFY-P12NGMU-E
NOTE:
• This manual describes only
service data of the indoor
units.
• RoHS compliant products have
<G> mark on the spec name
plate.
• For servicing of RoHS compli-
ant products, refer to the RoHS
PARTS LIST.
Revision:
• "12. RoHS PARTS LIST" has
been modified.
• Please void OC342
REVISED EDITION-B.

DIFFERENCES
1
NAMU-E
Lineflow fan × 1
4 speeds type
36
35
33
32
11-5/8
32-1/8
6-1/4
1/2"
1/4"
O.D. 5/8"
NFMU-E
Lineflow fan × 2
13-3/8
9-1/4
O.D. 13/16"
Item Model
Fan
Fan speed
Air flow
Noise level
Out dimension
Controller board
Pipe dimension
—
—
CFM
CFM
CFM
CFM
dB
dB
dB
dB
in.
in.
in.
—
—
—
—
—
—
in.
in.
in.
1
2
3
4
5
6
High
Medium 1
Medium 2
Low
High
Medium 1
Medium 2
Low
Height
Width
Depth
SW2
Gas side
Liquid side
Drain(unit side)
NGMU-E
Lineflow fan × 1
4 speeds type
42
40
36
32
13-3/8
39
9-1/4
1/2"
1/4"
O.D. 13/16"
2 speeds type
45
—
—
39
55-1/8
2 speeds type
49
—
—
46
66-1/8
OFF
OFF
OFF
OFF
ON
OFF
PKFY-
210
200
180
170
190
180
170
160
D
R
Y
W
E
T
410
370
340
280
370
330
300
250
D
R
Y
W
E
T
640
—
—
490
570
—
—
440
D
R
Y
W
E
T
990
—
—
780
890
—
—
700
D
R
Y
W
E
T
P06
OFF
OFF
ON
OFF
—
—
P08
ON
OFF
ON
OFF
—
—
P12
OFF
ON
ON
OFF
OFF
OFF
P15
OFF
OFF
OFF
ON
OFF
OFF
P18
OFF
ON
OFF
ON
OFF
OFF
1/2" / 5/8"
(Compatible)
1/4" / 3/8"
(Compatible)
P24
ON
OFF
ON
ON
OFF
OFF
P30
5/8"
3/8"
Differences among the models of PKFY series.
PKFY-P06NAMU-E
PKFY-P08NAMU-E
Indoor Unit
PKFY-P12NGMU-E
PKFY-P15NGMU-E
Indoor Unit
PKFY-P18NFMU-E
PKFY-P24NFMU-E
Indoor Unit
PKFY-P30NFMU-E
Indoor Unit
2
Revision :
"12. RoHS PARTS LIST" has been modified on page 61.
Page Revise point Service Ref.
61 All parts
No. 1~9 PKFY-P18/24/30NFMU-E

2FEATURES
1. Compact Design
• Compact 11-5/8 inch (29.5cm) high body fits snugly in even limited spaces.
• Light weight 19lbs (8.5kg) unit easy to transport and install.
2. Auto-flap shutter enhances good looks
With a simple flick of the OFF switch, the air outlet can be closed off with a shutter. The shutter also functions as a flap
during operation to adjust the air flow angle, with “Auto Angle” securing a comfortable air flow.
3. Quiet operation
4. The intake grille filter can be completely removed allowing easy cleaning
Model Cooling capacity / Heating capacity
PKFY-P06NAMU-E 6,000 / 6,700 Btu/h
PKFY-P08NAMU-E 8,000 / 9,000 Btu/h
Indoor Unit
PKFY-P06NAMU-E
PKFY-P08NAMU-E
3

4
1. Compact Design
Units have now been downsized to require minimal wall space.
A 20% reduction in width 39 inch (990mm) compared to previous models means that installation is possible in very narrow
spaces.
2. Auto-flap shutter enhances good looks
With a simple flick of the OFF switch, the air outlet can be closed off with a shutter. The shutter also functions as a flap
during operation to adjust the air flow angle, with “Auto Angle” securing a comfortable air flow.
3. The intake grille filter can be completely removed allowing easy cleaning
(Can be washed in water)
• Front grille
opens out
4. Quiet operation
• Airflow passage configuration that assures quiet operation
1The unit incorporates a random pitch cycling fan.
By changing fan intervals, quiet operation is achieved
without reduction in airflow. Optimal design of the
airflow passage gives a shortened fan diameter
and allows a highly compact installation.
2Thanks to a highly practical casing configuration,
airflow generated by the fan is distributed uniformly.
3Due to careful positioning of the vertical vane axis,
air is blown evenly from the outlet. This prevents mixing
with secondary air and also suppresses condensation.
Model Cooling capacity / Heating capacity
PKFY-P12NGMU-E 12,000 / 13,500 Btu/h
PKFY-P15NGMU-E 15,000 / 17,000 Btu/h
Indoor Unit
PKFY-P12NGMU-E
PKFY-P15NGMU-E

5
1. A further refinement of comfort with noise suppression
Remarkably low-noise operation has been achieved through the development of a “near -silent” fan and the design
which minimizes air flow resistance.
2. Auto flap shutter
With a simple flick of the OFF switch, the air outlet can be closed off with a shutter. The shutter also functions as a flap
during operation to adjust the air flow angle, with “Auto Angle” securing a comfortable air flow.
3. Easily removable filter
The presence of thumbscrews on the filters means that the filters can be quickly and smoothly removed.
Models Cooling capacity / Heating capacity
PKFY-P18NFMU-E 18,000 / 20,000 Btu/h
PKFY-P24NFMU-E 24,000 / 27,000 Btu/h
PKFY-P30NFMU-E 30,000 / 34,000 Btu/h
PKFY-P30NFMU-E
Indoor Unit
PKFY-P18NFMU-E
PKFY-P24NFMU-E
PKFY-P30NFMU-E

6
PART NAMES AND FUNCTIONS
3
Indoor Unit
PKFY-P06NAMU-E
PKFY-P08NAMU-E
Air intake
Air intake grille
Filter
Air outlet
Guide vane
Auto vane
PKFY-P12NGMU-E
PKFY-P15NGMU-E
Air intake
Room air is
suctioned in here.
Removes dust and dirt
from the intake air.
Filter Air intake grilles
Air outletAir outlet
Auto vane
Air flow can be changed to
horizontally by moving the
Guide vane to the left or right.
Guide vane
PKFY-P18NFMU-E
PKFY-P24NFMU-E
PKFY-P30NFMU-E
Air intake grille Air intake
Filter Auto vane
Air outlet

7
PAR-21MAA
ON/OFF
FILTER
CHECK
OPERATION
CLEAR
TEST
TEMP.
MENU
BACK 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
door
ON/OFF button
Fan Speed button
Filter button
(<Enter> button)
Test Run button
Check button (Clear button)
Airflow Up/Down button
Louver button
(Operation button)
To preceding operation
number
Ventilation button
(Operation button)
To next operation number
Operation buttons
Remote controller
Once the operation of the unit is set, subsequent operations can only be performed by pressing the ON/OFF button
repeatedly.

8
Display
For purposes of this explanation,
all parts of the display are shown
as lit. During actual operation, only
the relevant items will be lit.
°F°C
°F°C
ERROR CODE
AFTER
TIMER
TIME SUN MON TUE WED THU FRI SAT
ON
OFF
Hr
AFTER
FILTER
FUNCTION
ONLY1Hr.
WEEKLY
SIMPLE
AUTO OFF
Identifies the current operation
Shows the operating mode, etc.
* Multilanguage display is sup-
ported.
“Centrally Controlled” indicator
Indicates that operation of the re-
mote controller has been 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 Display
Shows the current time, unless the simple or Auto Off
timer is set.
If the simple or Auto Off timer is set, shows the time
remaining.
“Sensor” indication
Displayed when the remote controller
sensor is used.
“Locked” indicator
Indicates that remote controller but-
tons have been locked.
“Clean The Filter” indicator
Comes on when it is time to clean the
filter.
Timer indicators
The indicator comes on if the corre-
sponding timer is set.
Up/Down Air Direction indica-
tor
The indicator shows the direc-
tion of the outcoming airflow.
“One Hour Only” indicator
Displayed if the airflow is set to
low and downward during COOL
or DRY mode. (Operation varies
according to model.)
The indicator goes off after one
hour, at which time the airflow di-
rection also changes.
Room Temperature display
Shows the room temperature.
Louver display
Indicates the action of the swing
louver. Does not appear if the
louver is stationary.
(Power On indicator)
Indicates that the power is on.
Fan Speed indicator
Shows the selected fan speed.
Ventilation indicator
Appears when the unit is running in
Ventilation mode.
Caution
Only the Power on indicator lights when the unit is stopped and power supplied to the unit.
If you press a button for a feature that is not installed in the indoor unit, the remote controller will display the “Not Available”
message.
If you are using the remote controller to operate multiple indoor units, this message will appear only if the feature is not
present at every unit connected.
When power is turned ON for the first time, it is normal that “PLEASE WAIT” is displayed on the room temperature indication
(For max. 2minutes). Please wait until this “PLEASE WAIT” indication disappears then start the operation.

9
4SPECIFICATIONS
4-1. SPECIFICATIONS
PKFY-P06NAMU-E
PKFY-P08NAMU-E
Power Supply
Starting Current
Fan × No.
Air flow +2
External static pressure
Fan motor output
Item
Power source
Cooling capacity
Heating capacity
Exterior <munsell symbol>
Out dimensions
Heat exchanger
Fan
Insulator
Air filter
Pipe dimensions
Unit drain pipe size
Noise level +2
Product weight
Unit
:,V,Hz
Btu/h
Btu/h
kW
kW
A
A
—
in.
in.
in.
—
—
CFM
CFM
Pa
kW
—
—
in.
in.
in.
dB
lbs
Cooling
Heating
Cooling
Heating
Height
Width
Depth
DRY
WET
Gas side
Liquid side
PKFY-P06NAMU-E
6,000
6,700
PKFY-P08NAMU-E
8,000
9,000
0.03
0.03
0.15
0.15
Plastic , white : <2.60Y 8.66/0.69>
11-5/8
32-1/8
6-1/4
Cross fin (Aluminum plate fin and copper tube)
Lineflow fan × 1
170-180-200-210
160-170-180-190
0
0.017
Polyethylene sheet
PP honey comb
1/2"
1/4"
PVC pipe with O.D. 5/8"
32-33-35-36
19
Electric
characteristic
Single phase, 208/230V, 60Hz
Note 1. Rating conditions
Cooling : Indoor D.B. 80˚F W.B. 67˚F
Outdoor D.B. 95˚F W.B. 75˚F
Heating : Indoor D.B. 70˚F
Outdoor D.B. 47˚F W.B. 43˚F
w 2. Air flow and the noise level are indicated as Low - Medium2 - Medium1 - High.

10
Note 1. Rating conditions
Cooling : Indoor : D.B. 80°F W.B. 67°F
outdoor :D.B. 95°F W.B. 75°F
Heating : Indoor : D.B. 70°F
outdoor :D.B. 47°F W.B. 43°F
W2. Air flow and the noise level are indicated as Low - Medium2 - Medium1 - High.
Input
Current
Fan × No.
Air flow +2
External static pressure
Fan motor output
Item
Power source
Cooling capacity
Heating capacity
Exterior <munsell symbol>
Out dimensions
Heat exchanger
Fan
Insulator
Air filter
Pipe dimensions
Unit drain pipe size
Noise level +2
Product weight
Unit
:,V,Hz
Btu/h
Btu/h
kW
kW
A
A
—
in.
in.
in.
—
—
CFM
CFM
Pa
kW
—
—
in.
in.
in.
dB
lbs
Cooling
Heating
Cooling
Heating
Height
Width
Depth
DRY
WET
Gas side
Liquid side
PKFY-P12NGMU-E
12,000
13,500
PKFY-P15NGMU-E
15,000
17,000
0.07
0.07
0.34
0.34
Plastic , white : <0.70Y 8.59/0.97>
13-3/8
39
9-1/4
Cross fin (Aluminum plate fin and copper tube)
Lineflow fan × 1
280-340-370-410
250-300-330-370
0
0.03
Polyethylene sheet
PP honey comb
1/2"
1/4"
PVC pipe with O.D. 13/16"
32-36-40-42
35
Electric
characteristic
Single phase, 208/230V, 60Hz
PKFY-P12NGMU-E
PKFY-P15NGMU-E