Mitsubishi Electric City Multi PEFY-WP15VMS1-E User manual

Air-Conditioners
TECHNICAL & SERVICE MANUAL
Models PEFY-WP15VMS1-E
PEFY-WP20VMS1-E
PEFY-WP25VMS1-E
PEFY-WP32VMS1-E
PEFY-WP40VMS1-E
PEFY-WP50VMS1-E
2013

ii
HWE12090 GB
Safety Precautions
Read before installation and performing electrical work
Symbol explanations
Thoroughly read the following safety precautions prior to installation.
Observe these safety precautions for your safety.
This equipment may have adverse effects on the equipment on the same power supply system.
Contact the local power authority before connecting to the system.
WARNING
This symbol indicates that failure to follow the instructions exactly as stated poses the risk of serious injury or death.
CAUTION
This symbol indicates that failure to follow the instructions exactly as stated poses the risk of serious injury or dam-
age to the unit.
Indicates an action that must be avoided.
Indicates important instructions.
Indicates a parts that requires grounding.
Indicates that caution must be taken with rotating parts. (This symbol is on the main unit label.) <Color: Yellow>
Indicates that the parts that are marked with this symbol pose a risk of electric shock. (This symbol is on the main
unit label.) <Color: Yellow>
WARNING
Carefully read the labels affixed to the main unit.
WARNING
Do not use refrigerant other than the type indicated in the
manuals provided with the unit and on the nameplate.
Doing so may cause the unit or pipes to burst, or result in explosion
or fire during use, during repair, or at the time of disposal of the unit.
It may also be in violation of applicable laws.
MITSUBISHI ELECTRIC CORPORATION cannot be held
responsible for malfunctions or accidents resulting from the
use of the wrong type of refrigerant.
Ask your dealer or a qualified technician to install the unit.
Improper installation by the user may result in water leak-
age, electric shock, or fire.
Properly install the unit on a surface that can withstand its weight.
Unit installed on an unstable surface may fall and cause injury.
Only use specified cables. Securely connect each cable so
that the terminals do not carry the weight of the cable.
Improperly connected cables may produce heat and start a fire.
Take appropriate safety measures against wind gusts and
earthquakes to prevent the unit from toppling over.
Improper installation may cause the unit to topple over and
cause injury or damage to the unit.
Onlyuseaccessories(i.e.,aircleaners,humidifiers,electric
heaters) recommended by Mitsubishi Electric.
Do not make any modifications or alterations to the unit.
Consult your dealer for repair.
Improper repair may result in water leakage, electric shock,
or fire.
Do not touch the heat exchanger fins with bare hands.
The fins are sharp and pose a risk of cuts.
Properly install the unit according to the instructions in the
Installation Manual.
Improper installation may result in water leakage, electric
shock, or fire.
Have all electrical work performed by an authorized electri-
cian according to the local regulations and the instructions
in this manual. Use a dedicated circuit.
Insufficient power supply capacity or improper installation
of the unit may result in malfunctions of the unit, electric
shock, or fire.
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ii
HWE12090 GB
Precautions for handling units for use with water
WARNING
Keep electrical parts away from water.
Wet electrical parts pose a risk of electric shock, smoke, or
fire.
Securely attach the control box cover.
If the cover is not installed properly, dust or water may infil-
trate and pose a risk of electric shock, smoke, or fire.
Only use the type of refrigerant that is indicated on the unit
when installing or relocating the unit.
Infiltrationofany other typesofrefrigerant or airinto the unit
may adversely affect the refrigerant cycle and may cause
the pipes to burst or explode.
Consult your dealer or a qualified technician when moving
or reinstalling the unit.
Improper installation may result in water leakage, electric
shock, or fire.
After completing the service work, check for a refrigerant
leak.
If leaked refrigerant is exposed to a heat source, such as a
fan heater, stove, or electric grill, toxic gases will be gener-
ated.
Do not try to defeat the safety features of the unit.
Forced operation of the pressure switch or the temperature
switch by defeating the safety featuresfor these devices, or
the use of accessories other than the ones that are recom-
mended by Mitsubishi Electric may result in smoke, fire, or
explosion.
Consult your dealer for proper disposal method.
CAUTION
Do not use the existing water piping.
Store the piping materials indoors, and keep both ends of
the pipes sealed until immediately before installation. Keep
the joints wrapped in plastic bags. If dust or dirt enters the
water circuit, it may damage the heat exchanger and cause
water leakage.
Only use water.
Only use clean water as a refrigerant. The use of water out-
side the specification may damage the refrigerant circuit.
HWE12090.book ii ページ ２０１３年２月２２日 金曜日 午後１時３０分

CONTENTS
HWE12090 GB
I Features
[1] Features.................................................................................................................................... 1
II Components and Functions
[1] Components and Functions......................................................................................................2
III Specfications
[1] Specifications............................................................................................................................ 3
1.Specfications .......................................................................................................................... 3
2.Electrical component specifications........................................................................................ 5
IV Outlines and Dimensions
[1] Outlines and Dimensions.......................................................................................................... 6
V Wiring Diagram
[1] Wiring Diagram.........................................................................................................................8
VI Refrigerant System Diagram
[1] Refrigerant system diagram.................................................................................................... 10
VII Troubleshooting
[1] Troubleshooting...................................................................................................................... 11
1.Check methods..................................................................................................................... 11
2.DC fan motor (fan motor/indoor control board)..................................................................... 13
3.Address switch setting..........................................................................................................14
4.Voltage test points on the control board...............................................................................15
5.Dipswitch setting (Factory setting)........................................................................................ 16
6.Instructions for debris removal operation.............................................................................. 18
7.Instructions for the air vent operation ................................................................................... 18
VIII Disassembly Procedure
[1] Disassembly Procedure..........................................................................................................19
1.Control box ...........................................................................................................................19
2.Thermistor (Intake air) .......................................................................................................... 20
3.Drainpan............................................................................................................................... 21
4.Thermistor (Water outlet) (Water inlet)................................................................................. 22
5.Fan and fan motor ................................................................................................................23
6.Bearing ................................................................................................................................. 24
7.Heat exchanger ....................................................................................................................25
8.Drain pump........................................................................................................................... 26
9.Float Switch..........................................................................................................................27
HWE12090.book 1 ページ ２０１３年２月２２日 金曜日 午後１時３０分

[ I Features ]
- 1 -
HWE12090 GB
I Features
[1] Features
Model Cooling capacity/Heating capacity
kW
PEFY-WP15VMS1-E 1.7/1.9
PEFY-WP20VMS1-E 2.2/2.5
PEFY-WP25VMS1-E 2.8/3.2
PEFY-WP32VMS1-E 3.6/4.0
PEFY-WP40VMS1-E 4.5/5.0
PEFY-WP50VMS1-E 5.6/6.3
HWE12090.book 1 ページ ２０１３年２月２２日 金曜日 午後１時３０分

[ II Components and Functions ]
- 2 -
HWE12090 GB
II Components and Functions
[1] Components and Functions
1. Indoor (Main) Unit
(A) Air
(A)
(A)
HWE12090.book 2 ページ ２０１３年２月２２日 金曜日 午後１時３０分

[ III Specfications ]
- 3 -
HWE12090 GB
III Specfications
[1] Specifications
1. Specfications
*1 <Cooling> Indoor temperature: 27°CDB/19°CWB (81°FDB/66°FWB Outdoor temperature: 35°CDB (95°FDB)
<Heating> Indoor temperature: 20°CDB (68°FDB) Outdoor temperature: 7°CDB/6°CWB (45°FDB/43°FWB)
*2 The external static pressure is set to 15Pa at factory shipment.
Model PEFY-
WP15VMS1-E PEFY- WP20VMS1-E PEFY- WP25VMS1-E
Power supply Voltage V 220-240
Frequency Hz 50/60
Cooling capacity *1 kW 1.7 2.2 2.8
Heating capacity *1 kW 1.9 2.5 3.2
Power consumption *2 Cooling kW 0.050 0.051 0.060
Heating kW 0.030 0.031 0.040
Current consumption *2 Cooling A 0.44 0.49 0.51
Heating A 0.33 0.38 0.40
External finish (Munsel No.) Galvanized
Dimensions Height mm 200
Width mm 790
Depth mm 700
Net weight kg 19 20
Heat exchanger Cross fin (Aluminium fin and cupper tube)
Fan Type Sirocco fan x 2
Airflow rate
(Low-Mid-High) m3/min 5.0-6.0-7.0 5.5-6.5-8.0 5.5-7.0-9.0
External static
pressure Pa 5/15/35/50 5/15/35/50 5/15/35/50
Motor Output kW 0.096
Air filter PP Honeycomb fabric (washable)
Diameter of
water pipe Inlet in Rc3/4 screw
Outlet in Rc3/4 screw
Drain pipe dimensions mm [in.] O.D. 32 [1-1/4]
Operating noise
(Low-Mid-High) 5Pa dB (A) 22-24-26 22-25-28 23-25-29
15Pa 22-24-28 22-25-29 24-26-30
35Pa 24-26-29 25-27-30 25-28-31
50Pa 24-27-30 25-28-32 25-29-33
HWE12090.book 3 ページ ２０１３年２月２２日 金曜日 午後１時３０分

[ III Specfications ]
- 4 -
HWE12090 GB
*1 <Cooling> Indoor temperature: 27°CDB/19°CWB (81°FDB/66°FWB Outdoor temperature: 35°CDB (95°FDB)
<Heating> Indoor temperature: 20°CDB (68°FDB) Outdoor temperature: 7°CDB/6°CWB (45°FDB/43°FWB)
Model PEFY-WP32VMS1-E PEFY-WP40VMS1-E PEFY-WP50VMS1-E
Power supply Voltage V 220-240
Frequency Hz 50/60
Cooling capacity *1 kW 3.6 4.5 5.6
Heating capacity *1 kW 4.0 5.0 6.3
Power consumption Cooling kW 0.071 0.090 0.090
Heating kW 0.051 0.070 0.070
Current consumption Cooling A 0.61 0.73 0.77
Heating A 0.50 0.62 0.66
External finish (Munsel No.) Galvanized
Dimensions Height mm 200
Width mm 990 1190
Depth mm 700
Net weight kg 25 27
Heat exchanger Cross fin (Aluminium fin and cupper tube)
Fan Type Sirocco fan x 3 Sirocco fan x 4
Airflow rate
(Low-Mid-High) m3/min 8.0-9.5-11.0 9.5-11.0-13.0 12.0-14.0-16.5
External static
pressure Pa 5/15/35/50 5/15/35/50 5/15/35/50
Motor Output kW 0.096
Air filter PP Honeycomb fabric (washable)
Diameter of
water pipe Inlet in Rc3/4 screw
Outlet in Rc3/4 screw
Drain pipe dimensions mm [in.] O.D. 32 [1-1/4]
Operating noise
(Low-Mid-High) 5Pa dB (A) 26-29-32 29-31-34 29-32-35
15Pa 28-30-33 30-32-35 30-33-36
35Pa 30-32-35 31-34-37 31-35-39
50Pa 31-33-36 32-34-38 32-36-40
HWE12090.book 4 ページ ２０１３年２月２２日 金曜日 午後１時３０分

[ III Specfications ]
- 5 -
HWE12090 GB
2. Electrical component specifications
Component Sym-
bol PEFY- WP15VMS1-E PEFY- WP20VMS1-E PEFY- WP25VMS1-E
Room temperature
thermistor TH21 Resistance 0°C/15k , 10°C/9.6k , 20°C/6.3k , 25°C/5.4k , 30°C/4.3k , 40°C/3.0k
Water inlet pipe therm-
istor TH22 Resistance 0°C/15k , 10°C/9.6k , 20°C/6.3k , 25°C/5.4k , 30°C/4.3k , 40°C/3.0k
Water outlet pipe
thermistor TH23 Resistance 0°C/15k , 10°C/9.6k , 20°C/6.3k , 25°C/5.4k , 30°C/4.3k , 40°C/3.0k
Fuse FUSE 250V 6.3A
Fan motor 8-pole, Output 96W SIC-70CW-D8114-1
Power supply terminal
block TB2 (L, N, ) 330V 30A
Transmission terminal
block TB5 TB15 (1, 2), (M1, M2, S) 250V 20A
Drain float switch DS Open/short detection
Initial contact resistance 500 m or less
Component Sym-
bol PEFY-WP32VMS1-E PEFY-WP40VMS1-E PEFY-WP50VMS1-E
Room temperature
thermistor TH21 Resistance 0°C/15k , 10°C/9.6k , 20°C/6.3k , 25°C/5.4k , 30°C/4.3k , 40°C/3.0k
Water inlet pipe therm-
istor TH22 Resistance 0°C/15k , 10°C/9.6k , 20°C/6.3k , 25°C/5.4k , 30°C/4.3k , 40°C/3.0k
Water outlet pipe
thermistor TH23 Resistance 0°C/15k , 10°C/9.6k , 20°C/6.3k , 25°C/5.4k , 30°C/4.3k , 40°C/3.0k
Fuse FUSE 250V 6.3A
Fan motor 8-pole, Output 96W SIC-70CW-D896-2
Power supply terminal
block TB2 (L, N, ) 330V 30A
Transmission terminal
block TB5 TB15 (1, 2), (M1, M2, S) 250V 20A
Drain float switch DS Open/short detection
Initial contact resistance 500 m or less
HWE12090.book 5 ページ ２０１３年２月２２日 金曜日 午後１時３０分

[ IV Outlines and Dimensions ]
- 6 -
HWE12090 GB
IV Outlines and Dimensions
[1] Outlines and Dimensions
1. PEFY-WP15, 20, 25, 32, 40, 50VMS1-E
Unit : mm
64
70116
10 102
Water pipe(To HBC unit)
Rc3/4 screw Rc3/4 screw
Water pipe(From HBC unit)
Air
outlet Air
inlet
(O.D.
ø
32)
Drain pipe
Drain pump
Terminal bed(Transmission)
Drain pipe(O.D.
ø
32)
(Spontaneous draining)
1
2
Terminal bed(Power source)
Suspension bolt hole
4-14×30 Slot
Air filter
Control box
2
×
E-
ø
2.9
2
×
2-
ø
2.9
K-
ø
2.9
Knockout hole
ø
27
Knockout hole
ø
27
(Power source wiring)
(Transmission wiring)
PEFY-WP50VMS1-E PEFY-WP40VMS1-E PEFY-WP32VMS1-E PEFY-WP25VMS1-E PEFY-WP20VMS1-E
1190
990
790
1239
1039
839
M
24
20
16
900
700
500
9
7
5
1060
860
660
LJHK
700 752 798 660 7 600
Rc3/4 screw
(To HBC unit)
(From HBC unit)
1198
998
A
Model
PEFY-WP15VMS1-E
1152
952
B
1100
900
C
1060
860
D
11
9
E
1000
800
FG
57
15
700
150(Duct)
200
23 677
23
90
20
C
D (Duct)
A
M
L
49 625(Suspension bolt pitch)
23 B (Suspension bolt pitch)
270
48
270
170
10
100
100
× (E-1)=F
30
25
100
25
20
100
100×H=J
12
88
37 100 37
88
12
157.5
20 G
10
Water pipe
1
Watetr pipe
2
Less than 300mm
65
0
-10
Less than 550mm
<accessory>
Drain
hose
(I.D. 32)
(Actual length)
(A) Space required for service and maintenance.
(B) Provide an access door for maintenance at the bottom.
Note 1 Use M10 screw for the suspension bolt (field supply).
2 Keep the service space for the maintenance at the bottom.
3 This chart indicates for PEFY-WP32, 40VMS1-E models, which has 3 fans.
PEFY-WP15, 20, 25VMS1-E models have 2 fans.
PEFY-WP50VMS1-E models have 4 fans.
4 In case an inlet duct is used, remove the air filter (supply with the unit), then install the filter (field supply) at
suction side.
HWE12090.book 6 ページ ２０１３年２月２２日 金曜日 午後１時３０分

- 7 -
[ IV Outlines and Dimensions ]
GBHWE12090
Unit : mm
Min.300mm
Access door 1
(450×450)
Access door 3
Electric box
Intake air
Access door 1
(450×450)
Ceiling beam
Access door 2 (450×450)
Electric box
Supply air
Supply air Intake air
Maintenance access space
Maintenance access space
Maintenance access space
Electric box
Access door 4
(Viewed from the direction
of the arrow B)
Access door 3
Electric box
Bottom of indoor unit
(Viewed from the direction of the arrow B)
B
Ceiling beam
Ceiling
(Viewed from the direction of the arrow A)
Access door 2
(450×450)
Ceiling
A
Bottom of indoor unit
100~200 100~200
Electric box
Min.10mm
450
450
450
50~150
P
700
700
Min.300mm
N
50
50
R
777
777
50
Q
50
475
N
450
Min.20mm
Min.300mm
N
450
475
700
450
Min.300mm
Min.10mm
Fig.3
Fig.4 Fig.5
Fig.2
Fig.1
Bottom of indoor unit
[Maintenance access space] Secure enough access space to allow for the maintenance, inspection, and replacement of the motor, fan, drain pump, heat exchanger, and electric box in one of the following ways. Select an installation site for the indoor unit so that its maintenance access space will not be obstructed by beams or other objects. (1) When a space of 300mm or more is available below the unit between the unit and the ceiling. (Fig.1)
·
Create access door 1 and 2 (450x450mm each) as shown in Fig.2.
(Access door 2 is not required if enough space is available below the unit for a maintenance worker to work in.) (2) When a space of less than 300mm is available below the unit between the unit and the ceiling. (At least 20mm of space should be left below the unit as shown in Fig.3.)
·
Create access door 1 diagonally below the electric box and access door 3 below the unit as shown in Fig.4.
or
PEFY-WP15VMS1-E PEFY-WP20VMS1-E PEFY-WP25VMS1-E PEFY-WP32VMS1-E PEFY-WP40VMS1-E PEFY-WP50VMS1-E
700
N
Model
1100
900 150~250
250~350
P
50~150 800
Q
1200
1000
R
1700
1500
1300
·
Create access door 4 below the electric box and the unit as shown in Fig.5.
HWE12090.book 7 ページ ２０１３年２月２２日 金曜日 午後１時３０分

[ V Wiring Diagram ]
- 8 -
HWE12090 GB
V Wiring Diagram
[1] Wiring Diagram
1. PEFY-WP15, 20, 25, 32, 40, 50VMS1-E
NOTE: Symbols used in wiring diagram above are, (HEAVY DOTTED LINE):FIELD WIRING (THIN DOTTED LINE) :OPTIONAL PARTS
Drainpump
Fan motor
*A
In connecting optional IT terminal, use either CN51 or CN52 which is not connected. Be careful for connector colors.
*A
L1: only PEFY-WP50VMS1-E
INSIDE SECTION OF CONTROL BOX
TO MA REMOTE CONTROLLER
TO OUTDOOR UNIT BC CONTROLLER REMOTE CONTROLLER
SW14
(Connection No.)
SWBSWA
SWC
SW12
(10ths digit)
SW11
(1s digit)
SW1
A. B.
I. B.
31
12345
54185418
12345
8145
34512
MS
3~
8 7 6 5 4 3 2 1
4 3 2 1
1~
M
42311324 12 14567
3 1
135
12
13248132 4567
13
0123
4
5
6
7
8
9
A
B
C
DEF
01
2
3
4
5
6
7
8
9
01
2
3
4
5
6
7
8
9
IT terminal
(PAC-IT51AD-E)
IT terminal
(PAC-IT52AD-E)
CN52
(Green)
CN100
CN51
CN100
CN100
IT terminal
CN82
CN43
L1
t° t°
U
LED1
LED2
DC310~340V
Rectify circuit
ZNR01
POWER SUPPLY
~220, 230, 240V 50, 60Hz
TO NEXT INDOOR UNIT
FUSE (16A)
PULL BOX
BREAKER (16A)
FUSE
X1
ZNR02
DSA
U
t°
(Green)
(Blue)
(Red) (Red)
(Red)
(Red)
(Blue)
(Blue)
(Black)
TB5
N L
TB15
12
S(SHIELD)
M2
TB2
M1
FSTH22 TH23 TH21
CN3A
CNMF
CNP
CND
CN2M
SW2SW4SW3
CN90
CN42CN81CN32
CN27
CN20
CN4FCN44CN41CN52 CN51
SWE
ON
OFF
HWE12090.book 8 ページ ２０１３年２月２２日 金曜日 午後１時３０分

[ V Wiring Diagram ]
- 9 -
HWE12090 GB
Table.1 SYMBOL EXPLANATION
SYM-
BOL NAME SYM- BOL NAME SYM- BOL NAME
I.B. Indoor control board CN32 Connector (Remote switch) SW3
(I.B.) Switch (function setting)
A.B. Address board CN41 Connector (HA terminal-A) SW4
(I.B.) Switch (function setting)
TB2 Power supply terminal block CN51 Connector (Centralized con-
trol) SWE (I.B.) Connector (emergency opera- tion)
TB5 Transmission terminal block CN52 Connector (Remote display) SW1
(A.B.) Switch (function setting)
TB15 Transmission terminal block CN90 Connector (Wireless) SW11
(A.B.) Switch(For settingthe1'sdigit in the address)
FUSE Fuse AC 250V 6.3A CN100 Connector (IT terminal) SW12
(A.B.) Switch (For setting the 10's digit in the address)
ZNR01,
02 Varistor FS Float switch SW14 (A.B.) Switch (connection No.set- ting)
DSA Arrester TH21 Thermistor (inlet air) SWA
(A.B.) Switch (static pressure set- ting)
X1 Aux. relay TH22 Thermistor (water in) SWB
(A.B.) Switch (function setting)
L1 AC reactor (Power factor im-
provement) TH23 Thermistor (water out) SWC (A.B.) Switch (static pressure set- ting)
CN27 Connector (Damper) SW2
(I.B.) Switch (capacity code setting)
Note 1 Wiring to TB2, TB5, and TB15 indicated by the double-dashed lines is on-site work.
2 terminal block, connector.
HWE12090.book 9 ページ ２０１３年２月２２日 金曜日 午後１時３０分

[ VI Refrigerant System Diagram ]
- 10 -
HWE12090 GB
VI Refrigerant System Diagram
[1] Refrigerant system diagram
(A) Water outlet thermistor TH23
(B) Water outlet
(C) Water inlet
(D) Screw connections
(E) Water inlet thermistor TH22
(F) Heat exchanger
(G) Manual air purge valve
(H) Room temperature thermistor TH21
Capacity PEFY-WP15, 20, 25, 32, 40, 50VMS1-E
Water outlet Rc3/4 screw
Water inlet Rc3/4 screw
(F)
(H)
(C)
(A)
(E)
(D)
(B)
(G)
HWE12090.book 10 ページ ２０１３年２月２２日 金曜日 午後１時３０分

[ VII Troubleshooting ]
- 11 -
HWE12090 GB
VII Troubleshooting
[1] Troubleshooting
1. Check methods
1. Component and check points
(1) Thermistor
Room temperature thermistor (TH21)
Water inlet thermistor (TH22)
Water outlet thermistor (TH23)
Disconnect the connector and measure the resistance between terminals with a tester.
(Ambient temperature 10°C - 30°C)
1) Thermistor characteristic graph
(2) Fan motor (CNMF)
Refer to the page on "DC fan motor (fan motor/indoor control board)."
(3) Drain-up mechanism
Measure the resistance between the terminals with a tester.
(coil temperature 20°C)
Normal Abnormal
4.3k - 9.6k Open or short
(Refer to the thermistor characteristic graph below.)
Low-temperature thermistor
Room temperature thermistor (TH21)
Water inlet pipe thermistor (TH22)
Water outlet pipe thermistor (TH23)
Drain sensor (DS)
Thermistor R0= 15 k 3%
Multiplier of B = 3480 k 2%
0°C 15k
10°C 9.6k
20°C 6.3k
25°C 5.2k
30°C 4.3k
40°C 3.0k
(A) Temperature (°C)
(B) Resistance (k )
Normal Abnormal
340 Open or short
Rt = 15 exp { 3480( ) }
1
273+t 1
273
0
10
20
30
40
50
-20 -10 0 10 20 30 40 50
(A)
(B)
1
3
HWE12090.book 11 ページ ２０１３年２月２２日 金曜日 午後１時３０分

[ VII Troubleshooting ]
- 12 -
HWE12090 GB
(4) Drain float switch (CN4F)
Disconnect the connector, and measure the resistance between terminals with a tester.
(A) Moving part
(B) Switch
(C) Magnet
Position of the moving part Normal Abnormal
Up Short (any position but short)
Down Open (any position but open)
1
2
3
4
(A)
(A)
(B)
(C)
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HWE12090 GB
2. DC fan motor (fan motor/indoor control board)
1. CAUTION
A high voltage is applied to the connector for connection to the fan motor (CNMF).
Do not unplug the connector CNMF with the unit energized to avoid damage to the indoor control board and fan motor.
2. Troubleshooting
Symptom: Indoor unit fan does not run.
Check fan motor connector contact
(CNMF).
Replace the indoor control board.
Replace the indoor control board.
Fix the connection.
Yes
No
Yes
No
Yes
No
Check the fan motor position thermistor signal.
Get the motor to make a full rotation or more, and measure the voltage at the test point
V
FG .
(same with the voltage between fan connector 7 (+) and 4(-))
Is the fan motor connector
(CNMF) fully inserted?
Is the voltage within the
normal range?
Replace the motor.
Are 0VDC and 15VDC
displayed alternately?
Check the power supply.
Measure the voltage at the indoor control board.
310 - 340VDC (same with the voltage between fan connector 1 (+) and 4(-))
15VDC (same with the voltage between fan connector 5 (+) and 4(-))
1 - 6.5VDC (same with the voltage between fan connector 6 (+) and 4(-))
[Values for Vsp are the values that are measured with the fan motor in operation.
Vsp is 0V when the fan motor is stopped.]
VDC
Power supply voltage
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HWE12090 GB
3. Address switch setting
Make sure that power to the unit is turned off.
1. When using an ME remote controller, set the address with the rotary switches (SW11, SW12).
Address setting is not required when the unit remote controller is used.
On-site address setting is required for the indoor units to run.
2. Address settings vary in different systems.
Refer to the section on address setting in the outdoor unit installation manual.
3. Address is set with a combination of SW12 (10's digit) and SW11 (1's digit).
To set the address to "3," set SW12 to "0" and SW11 to "3."
To set the address to "25," set SW 12 to "2" and SW 11 to "5."
(A) Indoor unit control board
(B) Factory setting (all models)
ON
OFF
ON
OFF
(A)
(B)
1
2
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[ VII Troubleshooting ]
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HWE12090 GB
4. Voltage test points on the control board
1. PEFY-P15, 20, 25, 32, 40, 50, 63VMS1(L)-E
Fuse Fuse(AC 250V 6.3A)
CND Power supply voltage (220 -
240VAC)
CN2M For M-NET transmission cable
connection (24 - 30VDC)
SWE Emergency operation
SW2 Capacity setting
SW4 Function setting
CN42 For address board connection
SW3 Function setting
CN81 For address board connection
CN32 Remote start/stop adapter
CN3A For MA remote controller cable
connection
(10 - 13 VDC (Between 1 and 3.))
CN52 Remote display
CN51 Centralized control
CN41 JAMA standard HA terminal A
CN44 Thermistor (water inlet/water out-
let temperature)
CN4F Float thermistor
CN20 Thermistor (Inlet temperature)
CN3C Indoor-outdoor transmission
(0 - 24VDC)
CNMF Fan motor output
1 - 4: 310 - 340 VDC
5 - 4: 15 VDC
6 - 4: 0 - 6.5 VDC
7 - 4: Stop 0 or 15 VDC
Run 7.5 VDC
(0 - 15 pulse)
CNP Drain-up mechanism output
(200VAC)
(*1)
VFG Voltage on the (-) side of PC941
and C25
(Same with the voltage between 7
(+) and 4 (-) of CNMF)
VCC Voltage between the C25 pins
15 VDC
(Same with the voltage between 5
(+) and 4 (-) of CNMF)
Vsp Voltage between the C951 pins
0VDC (with the fan stopped)
1 - 6.5VDC (with the fan in opera-
tion)
(Same with the voltage between 6
(+) and 4 (-) of CNMF)
Fuse
CND
С25(*1)
CN2M
SWE
SW2
SW4
CN42
SW3
CN81
CN32
LED2 CN3A CN60
CN52
CN51
CN41
CN44
CN4F
CN20
CN3C
LED1
PC941(*1)
C951(*1)
CNMF
CNP
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HWE12090 GB
5. Dipswitch setting (Factory setting)
1. Function setting
(1) SW1
1) Adress board
(2) SW3
1) Indoor control board
Dipswitch settings must be made while the unit is stopped.
Switch position Function Switch setting
ON OFF
1 Active Thermistor (Intake air
thermistor) Built-in thermistor on the remote controller Indoor unit
2 Filter clogging detection Available Unavailable
3 Filter life 2500 hr 100 hr
4 Outdoor air intake Enabled Disabled
5 Remote display Thermo-ON signal Fan output
6 Humidifier operation During heating mode During heating operation
7 Fan speed Low Very low
8 Fan speed at heating Thermo-OFF Preset fan speed Follows the setting of SW1-7
9 Auto restart after power failure Enabled Disabled
10 Power start/stop Enabled Disabled
Factory setting
Switch position Function Switch setting
ON OFF
1 Unit type Cooling only Heat pump
2- - -
3- - -
4- - -
5- - -
6- - -
7- - -
8 Heating 4-deg up Disabled Enabled
Factory setting
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