40MAQ
High Wall Ductless System
Sizes 09 to 36
Service Manual
TABLE OF CONTENTS
PAGE
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . 1
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
MODEL/SERIAL NUMBER NOMENCLATURES . . . . . . . . . 2
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
COMPATIBILITY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
CLEARANCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
ELECTRICAL DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
WIRING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
CONNECTION DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . 6
WIRING DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
REFRIGERATION CYCLE DIAGRAMS . . . . . . . . . . . . . . . . . 9
REFRIGERANT LINES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
SYSTEM EVACUATION AND CHARGING . . . . . . . . . . . . . 10
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
INDOOR UNIT DIAGNOSTIC GUIDE . . . . . . . . . . . . . . . . . 16
DIAGNOSIS AND SOLUTION . . . . . . . . . . . . . . . . . . . . . . . 17
APPENDIX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
DISASSEMBLY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . 38
These words are used with the safety−alert symbol. DANGER
identifies the most serious hazards which will result in severe
personal injury or death. WARNING signifies hazards which
could result in personal injury or death. CAUTION is used to
identify unsafe practices which may result in minor personal injury
or product and property damage. NOTE is used to highlight
suggestions which will result in enhanced installation, reliability, or
operation.
WARNING
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Before installing, modifying, or servicing system, main
electrical disconnect switch must be in the OFF
position. There may be more than 1 disconnect switch.
Lock out and tag switch with a suitable warning label.
!
EXPLOSION HAZARD
Failure to follow this warning could
result in death, serious personal injury,
and/or property damage.
SAFETY CONSIDERATIONS
Installing, starting up, and servicing air−conditioning equipment
can be hazardous due to system pressures, electrical components,
and equipment location (roofs, elevated structures, etc.).
Only trained, qualified installers and service mechanics should
install, start−up, and service this equipment.
Untrained personnel can perform basic maintenance functions such
as cleaning coils. All other operations should be performed by
trained service personnel.
When working on the equipment, observe precautions in the
literature and on tags, stickers, and labels attached to the
equipment.
Follow all safety codes. Wear safety glasses and work gloves. Keep
quenching cloth and fire extinguisher nearby when brazing. Use
care in handling, rigging, and setting bulky equipment.
Read this manual thoroughly and follow all warnings or cautions
included in literature and attached to the unit. Consult local building
codes and National Electrical Code (NEC) for special requirements.
Recognize safety information. This is the safety−alert symbol !! .
When you see this symbol on the unit and in instructions or manuals,
be alert to the potential for personal injury. Understand these signal
words: DANGER, WARNING, and CAUTION.
WARNING
Never use air or gases containing
oxygen for leak testing or operating
refrigerant compressors. Pressurized
mixtures of air or gases containing
oxygen can lead to an explosion.
!
CAUTION
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
Do not bury more than 36 in. (914 mm) of refrigerant pipe
in the ground. If any section of pipe is buried, there must be
a 6 in. (152 mm) vertical rise to the valve connections on
the outdoor units. If more than the recommended length is
buried, refrigerant may migrate to the cooler buried section
during extended periods of system shutdown. This causes
refrigerant slugging and could possibly damage the
compressor at start−up.
INTRODUCTION
This Service Manual provides the necessary information to service,
repair, and maintain the indoor units. Section 2 of this manual has an
appendix with data required to perform troubleshooting. Use the Table
of Contents to locate a desired topic.
MODEL/SERIAL NUMBER NOMENCLATURES
Table 1—Unit Sizes
SYSTEM TONS
9
12
9
12
18
24
30
36
INDOOR MODEL
40MAQB09B--1
40MAQB12B--1
40MAQB09B--3
40MAQB12B--3
40MAQB18B--3
40MAQB24B--3
40MAQB30B--3
40MAQB36B--3
VOLTAGE/PH/HZ
115/1/60
208-230/1/60
INDOOR UNIT
40
MA
Q
B
09
B
--
3
40 = FAN COIL UNIT
VOLTAGE
1 =115-1-60
3 = 208/230-1-60
MA = MODEL
SYSTEM TYPE
Q = HEAT PUMP
B = ALL MODELS
NOT USED
NOMINAL CAPACITY
09 - 3/4 TON
12 - 1 TON
18 - 1-1/2 TONS
24 - 2 TONS
30 - 2 -1/2 TONS
36 - 3 TONS
INDOOR FAN COIL TYPE
B = HIGH WALL
01
16
V
Week of Manufacture
10001
Sequential Serial Number
V = ALL MODELS
Year of Manufacture
Use of the AHRI Certified
TM Mark indicates a
manufacturer’s
participation in the
program For verification
of certification for individual
products, go to
www.ahridirectory.org.
2
SPECIFICATIONS
Table 2—Specifications
HEAT PUMP
System
SIZE
9
Indoor Model
Voltage,
Phase, Cycle
Electrical
Operating
Range
Piping
Indoor
Coil
V/Ph/Hz
115-1-60
115-1-60
208/230-1-60
Power
Supply
12
18
24
30
36
208/230-1-60
208/230-1-60
208/230-1-60
208/230-1-60
208/230-1-60
Indoor unit powered from outdoor unit
0.4
0.4
0.2
0.2
0.27
0.4
0.4
0.4
Wireless Remote
Controller (° F/° C
Convertible)
A.
Standard
Standard
Standard
Standard
Standard
Standard
Standard
Standard
Wired Remote
Controller (° F/° C
Convertible)
Optional
Optional
Optional
Optional
Optional
Optional
Optional
Optional
Cooling
Indoor DB
Min -Max
° F(° C)
63~ 86 (17~ 30)
63~ 86 (17~ 30)
63~ 86 (17~ 30)
63~ 86 (17~ 30)
63~ 86 (17~ 30)
63~ 86 (17~ 30)
63~ 86 (17~ 30)
63~ 86 (17~ 30)
Heating
Indoor DB
Min -Max
° F(° C)
32~ 86 (0~ 30)
32~ 86 (0~ 30)
32~ 86 (0~ 30)
32~ 86 (0~ 30)
32~ 86 (0~ 30)
32~ 86 (0~ 30)
32~ 86 (0~ 30)
32~ 86 (0~ 30)
Pipe
Connection
Size Liquid
in (mm)
1/4 (6.35)
1/4 (6.35)
1/4 (6.35)
1/4 (6.35)
1/4 (6.35)
3/8 (9.52)
3/8 (9.52)
3/8 (9.52)
Pipe
Connection
Size Suction
in (mm)
3/8 (9.52)
1/2 (12.7)
3/8 (9.52)
1/2 (12.7)
1/2 (12.7)
5/8 (16)
5/8 (16)
5/8 (16)
Face Area
(sq. ft.)
Sq. Ft.
3.7
2.2
2.2
2.2
2.2
2.6
3.7
3.7
No. Rows
2
2
2
2
2
3
3
3
Fins per inch
20
20
20
20
20
18
18
18
Circuits
3
3
3
3
4
7
7
7
Unit Width
in (mm)
32.87 (835)
32.87 (835)
32.87 (835)
32.87 (835)
38.98 (990)
46.69 (1186)
46.69 (1186)
46.69 (1186)
Unit Height
in (mm)
11.02 (280)
11.02 (280)
11.02 (280)
11.02 (280)
12.40 (315)
13.39 (343)
13.39 (343)
13.39 (343)
Unit Depth
in (mm)
7.80 (198)
7.80 (198)
7.80 (198)
7.80 (198)
8.58 (218)
10.16 (258)
10.16 (258)
10.16 (258)
Net Weight
lbs (kg)
19.18 (8.7)
19.18 (8.7)
19.18 (8.7)
19.18 (8.7)
26.46 (12.0)
40.12 (18.2)
40.12 (18.2)
40.12 (18.2)
4
4
4
4
4
4
4
4
Airflow (lowest
to highest)
CFM
210/290/360/380
210/300/360/380
210/290/360/380
210/300/360/380
310/450/650/680
520/620/780/870
520/620/780/870
520/620/780/870
Sound
Pressure
(lowest to
highest)
dB(A)
27/34/42
27/34/42
27/34/42
27/34/42
33/40/46
39/45/50
39/45/50
39/45/50
Air Throw
Data
ft (m)
23 (7)
23 (7)
23 (7)
23 (7)
30 (9)
36 (11)
36 (11)
36 (11)
Fan Speeds
Indoor
9
40MAQB09B--1 40MAQB12B--1 40MAQB09B--3 40MAQB12B--3 40MAQB18B--3 40MAQB24B--3 40MAQB30B--3 40MAQB36B--3
MCA
Controls
12
Performance may vary based on the outdoor unit matched to. See Table 3 for compatible outdoor units.
Legend
SEER - Seasonal Energy Efficiency Ratio
EER - Energy Efficiency Ratio
MCA - Minimum Circuit Amps
MOCP - Max. Over-Current Protection
COMPATIBILITY
Table 3—Compatibility
INDOOR UNIT
40MAQB09B--1
40MAQB12B--1
40MAQB09B--3
40MAQB12B--3
40MAQB18B--3
40MAQB24B--3
40MAQB30B--3
OUTDOOR UNIT
SINGLE ZONE
38MAQB09---1
38MAQB12---1
38MAQB09---3
38MAQB12---3
38MAQB18---3
38MAQB24---3
38MAQB30---3
38MAQB09R--1
38MAQB12R--1
38MAQB09R--3
38MAQB12R--3
38MAQB18R--3
38MAQB24R--3
38MAQB30R--3
38MGQC18---3
38MGQD27---3
38MGQF36---3
38MGQF48---3
OUTDOOR UNIT
MULTI-ZONE
38MGRQ18B--3
38MGRQ24C--3
38MGRQ30D--3
38MGRQ36D--3
38MGRQ48E--3
3
40MAQB36B--3
38MAQB36R--3
DIMENSIONS
Table 4—Dimensions
HIGH WALL UNIT SIZE
9K
12K
9K
12K
18K
24K
30K
36K
Voltage
(115V)
(115V)
(208/230V)
(208/230V)
(208/230V)
(208/230V)
(208/230V)
(208/230V)
Height
In (mm)
11.02 (280)
11.02 (280)
11.02 (280)
11.02 (280)
12.40 (315)
13.39 (343)
13.39 (343)
13.39 (343)
Width
In (mm)
32.87 (835)
32.87 (835)
32.87 (835)
32.87 (835)
38.98 (990)
46.69 (1186)
46.69 (1186)
46.69 (1186)
Depth
In (mm)
7.80 (198)
7.80 (198)
7.80 (198)
7.80 (198)
8.58 (218)
10.16 (258)
10.16 (258)
10.16 (258)
Weight-Net
Lbs (kg)
19.18 (8.7)
19.18 (8.7)
19.18 (8.7)
19.18 (8.7)
24.46 (12.0)
40.12 (18.2)
40.12 (18.2)
40.12 (18.2)
Fig. 1 – Indoor Units
CLEARANCES
CEILING
6" (0.15m) min.
5"
(0.13m)
min.
5"
(0.13m)
min.
6' (1.8m)
FLOOR
Fig. 2 – Indoor Unit Clearance
4
ELECTRICAL DATA
Table 5—Electrical Data Indoor High Wall
HIGH WALL
UNIT SIZE
9K
12K
9K
12K
18K
24K
30K
36K
V-Ph-Hz
115-1-60
208/230-1-60
INDOOR FAN
FLA
0.33
0.33
0.33
0.33
0.49
0.61
0.61
0.61
MAX FUSE CB AMP
HP
0.053
0.053
0.053
0.053
0.067
0.16
0.16
0.16
Refer to outdoor unit installation instructions –
Indoor unit powered by the outdoor unit
*Permissible limits of the voltage range at which the unit will operate satisfactorily.
LEGEND
FLA - Full Load Amps
WIRING
All wires must be sized per NEC (National Electrical Code) or
CEC (Canadian Electrical Code) and local codes. Use the Electrical
Data table MCA (minimum circuit amps) and MOCP (maximum
over current protection) to correctly size the wires and the
disconnect fuse or breakers respectively.
Per the caution note, only stranded copper conductors with a 600
volt rating and double insulated copper wire must be used. The use
of BX cable is not recommended.
Recommended Connection Method for Power and
Communication Wiring −
Power and Communication Wiring:
The main power is supplied to the outdoor unit. The field supplied
14/3 power/communication wiring from the outdoor unit to the
indoor unit consists of four (4) wires and provides the power for
the indoor unit. Two wires are high voltage AC power, one is
communication wiring and the other is a ground wire.
Recommended Connection Method for Power and
Communication Wiring (To minimize communication
wiring interference)
Power Wiring:
The main power is supplied to the outdoor unit. The field supplied
power wiring from the outdoor unit to the indoor unit consists of
three (3) wires and provides the power for the indoor unit. Two
wires are high voltage AC power and one is a ground wire. To
minimize voltage drop, the factory recommended wire size is 14/2
stranded with a ground.
Communication Wiring:
A separate shielded stranded copper conductor only, with a 600
volt rating and double insulated copper wire, must be used as the
communication wire from the outdoor unit to the indoor unit.
Please use a separate shielded 16GA stranded control wire.
!
CAUTION
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
S Wires should be sized based on NEC and local codes.
S Use copper conductors only with a minimum 600 volt
rating and double insulated copper wire.
!
CAUTION
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage
or improper operation.
SBe sure to comply with local codes while running wire from
the indoor unit to the outdoor unit.
SEvery wire must be connected firmly. Loose wiring may
cause the terminal to overheat or result in unit malfunction.
A fire hazard may also exist. Therefore, ensure all wiring is
tightly connected.
SNo wire should be allowed to touch the refrigerant tubing,
compressor or any moving parts.
SDisconnecting means must be provided and shall be located
within sight and readily accessible from the air conditioner.
SConnecting cable with conduit shall be routed through a hole
in the conduit panel.
5
CONNECTION DIAGRAMS
Fig. 3 – 115V
Fig. 4 – 208−230V
Notes:
1. Do not use thermostat wire for any connection between indoor and outdoor units.
2. All connections between indoor and outdoor units must be as shown. The connections are sensitive to polarity and will result in a fault code.
6
,1)$1
M
5
CN4
P_1
M
6:,1*02725
WIRING DIAGRAMS
CN5
&1
RED
BLUE(BLACK)
YELLOW
L-IN
Y/G
&1
CN2
JX1
INDOOR UNIT
OUTDOOR UNIT
3,3(7(03(5$785(6(1625
CN11
N
&1$
&1
6
L N S
52207(03(5$785(6(1625
CN16
INDOOR WIRING DIAGRAM
8(7)
Fig. 5 – Wiring Diagram Sizes 09−12 (115V)
Table 6—INDOOR UNIT CONTROL BOARD
INPUT or OUTPUT VALUE
L_IN
CN11
CN16
CN15
CN4
Power Voltage: AC115V
Power Voltage: AC115V
Relative to the N terminal voltage: DC 24V
Maximum voltage: DC5V
Indoor fan interface, maximum voltage: DC310V
CN5
P_1
CN8
CN9
CN10A
Stepper motor interface, maximum voltage between the lines: DC12V
Ground
Room temperature sensor interface, maximum voltage: DC5V
Pipe temperature sensor interface, maximum voltage: DC5V
Display interface,maximum voltage between the lines: DC5V
7
OPTIONAL
Wi-Fi
Contoller
',63/$<%2$5'
&1
&1
Wire Contoller
OPTIONAL
,1)$1
M
5
CN4
P_1
M
6:,1*02725
WIRING DIAGRAMS (CONT)
CN5
&1
RED
BLUE(BLACK)
YELLOW
L-IN
CN2
&1
CN11
Y/G
3,3( 7(03(5$785( 6(1625
N
&1$
&1
6
L1L2 S
52207(03(5$785(6(1625
JX1
INDOOR UNIT
OUTDOOR UNIT
CN16
INDOOR WIRING DIAGRAM
8(7)
Fig. 6 – Wiring Diagram Sizes 09−36 (208−230V)
Table 7—INDOOR UNIT CONTROL BOARD
L_IN
CN11
CN16
INPUT or OUTPUT VALUE
Power Voltage: AC230V
Power Voltage: AC230V
Relative to the N terminal voltage: DC24V
CN15
CN4
CN5
P_1
Maximum voltage: DC5V
Indoor fan interface, maximum voltage: DC310V
Stepper motor interface, maximum voltage between the lines: DC12V
Ground
CN8
CN9
CN10A
Room temperature sensor interface, maximum voltage: DC5V
Pipe temperature sensor interface, maximum voltage: DC5V
Display interface,maximum voltage between the lines: DC5V
8
OPTIONAL
Wi-Fi
Contoller
',63/$<%2$5'
&1
&1
Wire Contoller
OPTIONAL
REFRIGERATION CYCLE DIAGRAMS
Fig. 7 – Heat Pumps
REFRIGERANT LINES
IMPORTANT: Both refrigerant lines must be insulated separately.
Table 2 lists the pipe sizes for the indoor unit. Refer to the outdoor unit installation instructions for other allowed piping lengths and
refrigerant information.
9
SYSTEM EVACUATION AND
CHARGING
!
CAUTION
Deep Vacuum Method
The deep vacuum method requires a vacuum pump capable of
pulling a vacuum of 500 microns and a vacuum gage capable of
accurately measuring this vacuum depth. The deep vacuum method
is the most positive way of assuring a system is free of air and
liquid water (see Fig. 10).
5000
4500
4000
3500
3000
2500
2000
1500
1000
500
UNIT DAMAGE HAZARD
Never use the system compressor as a vacuum pump.
Refrigerant tubes and indoor coil should be evacuated using the
recommended deep vacuum method of 500 microns. The alternate
triple evacuation method may be used if the following procedure is
followed. Always break a vacuum with dry nitrogen.
NOTE: All units (except the 18,000 BTU model) have a Master
Suction and Liquid Line Service Valve.
Using Vacuum Pump
1 Completely tighten the flare nuts (A, B, C, D, E). Fully
open all circuits service valves. Connect the manifold gage
charge hose to the charge port of the low side Master service
valve to evacuate all circuits at the same time (see Fig. 8).
2 Connect the charge hose to the vacuum pump.
3 Fully open the low side of manifold gage (see Fig. 9).
4 Start the vacuum pump
5 Evacuate using the triple evacuation method.
6 After evacuation is complete, fully close the low side of
manifold gage and stop the vacuum pump operation.
7 The factory charge contained in the outdoor unit is good for
up to 25ft. (8 m) of line length.
8 Disconnect the charge hose from the charge connection of
the low side service valve.
9 Securely tighten the service valves caps.
B
TIGHT
DRY SYSTEM
Low Side
2
3 4
5
MINUTES
6
7
Triple Evacuation Method
The triple evacuation method should be used. Refer to Fig. 11 and
proceed as follows:
1 Pump system down to 500 MICRONS of mercury and
allow the pump to continue operating for an additional 15
minutes. Unit must maintain 500 microns or less for 30
minutes or more to ensure a dry system.
2 Close the service valves and shut off the vacuum pump.
3 Connect a nitrogen cylinder and regulator to the system and
open until the system pressure is 2 psig.
4 Close the service valve and allow the system to stand for 10
minutes. During this time, dry nitrogen will be able to
diffuse throughout the system absorbing moisture.
5 Repeat this procedure as indicated in Fig. 11. The system
will then be free of any contaminants and water vapor.
EVACUATE
C
BREAK VACUUM WITH DRY NITROGEN
D
High Side
1
Fig. 10 – Deep Vacuum Graph
Indoor Unit
Refrigerant
A
VACUUM TIGHT
TOO WET
0
System Vacuum and Charge
Outdoor Unit
LEAK IN
SYSTEM
MICRONS
Failure to follow this caution may result in equipment
damage or improper operation.
WAIT
EVACUATE
Service Valve
BREAK VACUUM WITH DRY NITROGEN
Fig. 8 – Service Valve
WAIT
Manifold Gage
EVACUATE
CHECK FOR TIGHT, DRY SYSTEM
(IF IT HOLDS DEEP VACUUM)
500 microns
Low side valve
High side valve
Charge hose
RELEASE CHARGE INTO SYSTEM
Charge hose
Vacuum pump
Low side valve
Fig. 9 – Manifold
Fig. 11 – Triple Evacuation Method
Final Tubing Check
IMPORTANT: Check to be certain factory tubing on both
indoor and outdoor unit has not shifted during shipment.
Ensure tubes are not rubbing against each other or any sheet
metal. Pay close attention to feeder tubes, making sure wire ties
on feeder tubes are secure and tight.
10
Main Protection
Fan Speed is Out of Control
When the indoor fan speed remains too low (300RPM) or too high
(1500RPM) for a certain time, the unit stops and the LED displays
the failure.
Inverter Module Protection
The inverter module has a protection function for current, voltage
and the temperature. If any of these protections trigger, the
corresponding code displays on the indoor unit and the unit shuts
down.
Indoor Fan Delayed Open Function
When the unit starts up, the louver becomes active immediately
and the indoor fan opens 10s later. If the unit runs in the
HEATING mode, the indoor fan will be controlled by the
anti−cold wind function.
Zero Crossing Detection Error Protection
If the AC detects that the time interval is not correct for a
continuous period of 240s, the unit stops and the LED displays the
failure. The correct zero crossing signal time interval should be
between 6−13ms.
Sensor Protection at Open Circuit and Breaking Disconnection
When there is only one malfunctioning temperature sensor, the air
conditioner keeps working yet displays the error code, in case of
any emergency use. When there is more than one malfunctioning
temperature sensor, the air conditioner stops working.
COOLING Mode
Indoor Fan Running Rules
In the COOLING mode, the indoor fan runs all the time and the
speed can be selected as high, medium, low and auto. When the
setting temperature is reached, if the compressor stops running, the
indoor fan motor runs at the minimum or setting speed.
The indoor fan is controlled by the rules shown in Fig. 13.
Setting fan
T1-Td ć(°F)
speed
H
M
L
Actual fan speed
$
%
&
'
(
)
*
+
,
++ +*
+˄ +˅
+˄+ +*
00 0=
00 0
00 0=
// /'
// /
// /'
Fig. 13 – Indoor Fan Running Rules
The AUTO fan is controlled by the rules shown in Fig. 14.
Operation Modes and Functions
FAN Mode
1 Outdoor fan and compressor stop
2 Temperature setting function is disabled, and no setting
temperature is displayed.
3 Indoor fan can be set to high/med/low/auto
4 The louver operates the same in the COOLING mode.
Fig. 14 – Indoor Fan Running Rules
Evaporator Temperature Protection
When the evaporator temperature is less than the setting value, the
compressor stops.
Fig. 12 – Auto Fan
11
HEATING Mode
Indoor Fan Running Rules
When the compressor is on, the indoor fan can be set to
high/med/low/auto/mute. When the indoor unit coil temperature is
low, the anti−cold air function starts and the indoor fan motor runs
at a low speed and the speed can not be changed. When the
temperature is lower than the setting value, the indoor fan motor
stops.
When the indoor temp reaches the setting temperature, the
compressor stops, the indoor fan motor runs at the minimum speed
or setting speed. (The anti−cold air function is valid). The indoor
fan is controlled as shown in Fig. 15.
Setting fan
T1-Tdć
speed
Evaporator Coil Temperature Protection
Actual fan speed
H-˄H-=H-G)
H
H˄=H˅
H+(H+=H+G)
M-(M-=M-Z)
M
M(M=M)
M+(M+=M+Z)
L-(L-=L-D)
L
L(L=L)
L+(L+=L+D)
Fig. 15 – Indoor Fan Running Rules
Auto Fan Action in HEATING Mode
Fig. 16 – Auto Fan Action in HEATING Mode
DEFROSTING Mode
The air conditioner enters the DEFROSTING mode according to
the T3 temperature value and the T3 temperature change value
range plus the compressor running time.
During the DEFROSTING mode, the compressor continues to
runs, the indoor and outdoor motors stop, and the indoor unit
defrost lamp illuminates and
appears.
Fig. 17 – Evaporator Coil Temperature Protection
When the evaporator temperature is higher than the setting
protection value, the compressor stops.
Auto−Mode
This mode can be chosen with the remote controller and the setting
temperature can be changed between 62.6_F(17_C)~86_F(30_C).
In the AUTO mode, the machine chooses the COOLING,
HEATING or FAN−ONLY mode according to ΔT (ΔT =T1−Ts).
Fig. 18 – AUTO Mode
The indoor fan runs under auto fan in the relevant mode. The
louver operates same as in relevant mode. If the machine switches
mode between HEATING and COOLING, the compressor stops
for a certain time and then chooses the mode according to T1−Ts. If
the setting temperature is modified, the machine chooses the
running function again.
DRYING Mode
Indoor Fan Speed is Fixed
Indoor fan speed is fixed at breeze and can not be changed. The
louver angle is the same as in the COOLING mode.
Low Indoor Room Temperature Protection
In the DRYING mode, if the room temperature is lower than 50_F
(10_C), the compressor stops and will not resume until the room
temperature exceeds 53.6_F (12_C).
12
Evaporator Anti−Freezing Protection
The evaporator anti−freezing protection condenser high
temperature protection and outdoor unit frequency limit are active
and the same as that in the COOLING mode.
Outdoor Fan
The outdoor fan operates the same as in the COOLING mode.
FORCED OPERATION Function
When the machine is off, press the touch button to engage the
FORCED AUTO mode. Press the button again within 5 seconds
to engage the FORCED COOLING mode. In the FORCED
AUTO, FORCED COOLING or any other operation mode, press
the touch button to off the machine.
FORCED OPERATION Mode
In the FORCED OPERATION mode, all the general protections
and remote control are available.
Operation Rules
FORCED COOLING Mode:
The compressor runs at the F2 frequency and the indoor fan runs in
the BREEZE mode. After running for 30 minutes. the machine
enters AUTO mode at the 75.2_F(24_C) setting temperature.
FORCED AUTO mode:
The FORCED AUTO mode is the same as the normal AUTO
mode with a 75.2_F(24_C) setting temperature.
AUTO−RESTART Function
The indoor unit is equipped with the AUTO−RESTART function,
which is carried out through an auto−restart module. In the event of
a sudden power failure, the module memorizes the setting
conditions prior to the power failure. The unit resumes the previous
operation setting (not including the SWING function)
automatically three (3) minutes after the power returns.
If the memorization condition is the FORCED COOLING mode,
the unit will run in the COOLING mode for 30 minutes and turn
to the AUTO mode at the 75.2_F(24_C) setting temperature.
If the air conditioner is off before the power turns off and the air
conditioner is required to start up, the compressor delays start up
for 1 minute before powering on. In other instances, the
compressor waits three (3) minutes before restarts.
Refrigerant Leakage Detection
With this new technology, the display area displays “EC” when the
outdoor unit detects a refrigerant leak. This function is only active
in cooling mode. It can better prevent the compressor being
damaged by refrigerant leakage or compressor overload.
S
Open Condition: When the compressor is active, the
value of the Coil temperature of evaporator T2 has no
change or very little change.
Louver Position Memory Function
When starting the unit again after shutting down, the louver returns
to the angle originally set by the user, however the precondition is
that the angle must be within the allowable range, if it exceeds, it
will memorize the maximum angle of the louver. During operation,
if the power fails or the end user shuts down the unit in the turbo
mode, the louver returns to the default angle.
46_F (8_C) Heating
When the compressor is running, the indoor fan motor runs
without the ANTI−COLD air function. When the compressor is
off, the indoor fan motor is off.
Silence Operation
Press the SILENCE button on the remote controller to initiate the
SILENCE function. When the SILENCE function is activated,
the compressor running frequency remains lower than F2 and the
indoor unit emits a faint breeze, which reduces the noise to the
lowest level and create a quiet and comfortable room for the user.
Point Check Function
Press the remote controller’s LED DISPLAY or LED or MUTE
button three times, and then press the AIR DIRECTION or
SWING button three times in ten seconds, the buzzer rings for two
seconds. The air conditioner enters into the information enquiry
status.
Press the LED DISPLAY or AIR DIRECTION button to check
the next or front item’s information.
When the air conditioner enters the information enquiry status, it
displays the code name in 2 seconds (see Table 8).
13
Table 8—Information Enquiry
ENQUIRY INFORMATION
DISPLAYING CODE
MEANING
T1
T1
T1 temp.
T2
T2
T2 temp.
T3
T3
T3 temp.
T4
T4
T4 temp.
T2B
Tb
T2B temp.
TP
TP
TP temp.
TH
TH
TH temp.
Targeted Frequency
FT
Targeted Frequency
Actual Frequency
Fr
Actual Frequency
Indoor Fan Speed
IF
Indoor fan speed
Outdoor Fan Speed
OF
Outdoor fan speed
EXV Opening Angle
LA
EXV opening angle
Compressor continuous running time
CT
Compressor continuous running time
Compressor stop causes
ST
Compressor stop causes
Reserve
A0
Reserve
A1
Reserve
b0
Reserve
b1
Reserve
b2
Reserve
b3
Reserve
b4
Reserve
b5
Reserve
b6
Reserve
dL
Reserve
Ac
Reserve
Uo
Reserve
Td
When the air conditioner enters the information enquiry status, it displays the code value for 25 seconds (see Table 9).
Table 9—Information Enquiry
ENQUIRY
INFORMATION
T1,T2,T3,T4,
T2B,TP,TH,
Targeted
Frequency,
Actual
Frequency
DISPLAY VALUE
MEANING
-1F,-1E,-1d,-1c,
-1b,-1A
-25,-24,-23,-22,-21,-20
-19—99
-19—99
A0,A1,…A9
100,101,…109
b0,b1,…b9
110,111,…119
c0,c1,…c9
120,121,…129
d0,d1,…d9
130,131,…139
E0,E1,…E9
140,141,…149
F0,F1,…F9
150,151,…159
REMARK
1. The displaying temperature is the actual value.
2. The temperature is _C no matter what kind of remote
controller is used.
3. T1,T2,T3,T4,T2B display range:-25~70, TP display
range:-20~130.
4. Frequency display range: 0~159HZ.
5. If the actual value exceeds the range, it displays the
maximum value or minimum value.
0
OFF
1,2,3,4
Low speed, Medium speed,
High speed, Turbo
For some big capacity motors.
14-FF
Actual fan speed = Display
value turns to decimal value
and then multiply 10. The
unit is RPM.
For some small capacity motors, the display value is from
14-FF (hexadecimal), the corresponding fan speed range
is from 200-2550 RPM.
EXV opening
angle
0-FF
Actual EXV opening value =
Display value turns to
decimal value and then
multiply 2.
Compressor
continuous
running time
0-FF
0-255 minutes
Compressor stop
causes
0-99
For the detailed meaning,
please consult with engineer
Reserve
0-FF
Indoor fan speed
/Outdoor fan
speed
If the actual value exceeds the range, it displays the
maximum value or minimum value.
14
Decimal display
TROUBLESHOOTING
Safety
Electricity power is kept in capacitors even if the power supply is shut off.
NOTE: Remember to discharge the electricity power in capacitor.
Electrolytic Capacitors
(HIGH VOLTAGE! CAUTION!)
Fig. 19 – Electrolytic Capacitors
For other models, please connect discharge resistance (approximately 100Ω 40W) or a soldering iron (plug) between the +, − terminals of the
electrolytic capacitor on the contrary side of the outdoor PCB.
Fig. 20 – Discharge Position
NOTE: Fig. 20 is for reference only. The plug on your unit may differ.
15
INDOOR UNIT DIAGNOSTIC GUIDE
Table 10—Indoor Unit Error Display
OPERATION LAMP
TIMER LAMP
DISPLAY
H 1 time
H 2 times
H 3 times
H 4 times
H 5 times
H 6 times
H 7 times
H 1 time
H 2 times
H 3 times
H 4 times
H 5 times
H 6 times
H 1 time
H 2 times
X
E0
Indoor unit EEPROM parameter error
LED STATUS
X
E1
Indoor / outdoor units communication error
X
E2
Zero-crossing signal detection error
X
E3
Indoor fan speed has been out of control
X
E4
Indoor room temperature sensor T1 open circuit or short circuit
X
E5
Evaporator coil temperature sensor T2 open circuit or short circuit
X
EC
Refrigerant leakage detection
O
F0
Overload current protection
O
F1
Outdoor ambient temperature sensor T4 open circuit or short circuit
O
F2
Condenser coil temperature sensor T3 open circuit or short circuit
O
F3
Compressor discharge temperature sensor T5 open circuit or short circuit
O
F4
Outdoor unit EEPROM parameter error
O
F5
Outdoor fan speed has been out of control
H
H
P0
IPM malfunction or IGBT over-strong current protection
P1
Over voltage or over low voltage protection
H 3 times
H
P2
High temperature protection of compressor top diagnosis and solution (only for
9k,12k models)
H 5 times
H
P4
Inverter compressor drive error
O(light)
X(off)
H(flash)
16
DIAGNOSIS AND SOLUTION
EEPROM Parameter Error Diagnosis and Solution (E0/F4)
Error Code
E0/F4
Malfunction decision conditions
Indoor or outdoor PCB main chip does not receive feedback from the EEPROM chip.
Supposed causes
·Installation mistake
·PCB faulty
Troubleshooting
Power off, then restart the
unit 2 minutes later.
Yes
Replace the indoor/outdoor
main PCB.
EEPROM: A read−only memory whose contents can be erased and reprogrammed using a pulsed voltage. For the EEPROM chip location,
please refer to Fig 21 and Fig. 22.
Fig. 21 – Indoor PCB
Fig. 22 – Outdoor PCB (18K Model)
NOTE: The two photos above are for reference only and they may differ from the actual unit.
17
DIAGNOSIS AND SOLUTION (CONT)
Indoor / outdoor unit’s communication diagnosis and solution (E1)
Error Code
E1
Malfunction Decision Conditions
Indoor unit does not receive the feedback from outdoor unit during 110 seconds and this condition
happens four times continuously.
Supposed Causes
·Wiring mistake
·Indoor or outdoor PCB faulty
Troubleshooting
Power off, then restart the unit 2 minutes later
Yes
Measure Vs., is it a positive fluctuation?
(Vs represents the voltage S and N of the
outdoor unit. Red pan-S, Black pan-N)
No
Yes
Check the outdoor wiring connection
Check the indoor wiring connection
Yes
Yes
Replace the reactor
No
Check whether the
reactor is normal
Replace the indoor main PCB.
Power on. Is the error resolved?
Yes
No
Replace the outdoor main PCB.
Power on. Is the error resolved?
No
Replace the indoor main PCB
18
Replace the outdoor main PCB.
DIAGNOSIS AND SOLUTION (CONT)
Fig. 23 – Test the DC Voltage
Use a multimeter to test the DC voltage between L2 port and S port of the outdoor unit. The red pin of the multimeter connects with the L2
port while the black pin is for the S port. When air conditioner is running normal, the voltage moves alternately between −50V to 50V. If the
outdoor unit has a malfunction, the voltage will move alternately with positive value. If the indoor unit has malfunction, the voltage will have
a certain value.
Fig. 24 – Test the Reactor Resistance
Use a multimeter to test the resistance of the reactor which does not connect with the capacitor. The normal value should be around zero (0)
ohm. Otherwise, the reactor has a malfunction and needs to be replaced.
19
DIAGNOSIS AND SOLUTION (CONT)
Zero crossing detection error diagnosis and solution (E2)
Error Code
E2
Malfunction decision conditions
When the PCB does not receive a zero crossing signal feedback for 4 minutes or the zero crossing
signal time interval is abnormal.
Supposed causes
·Connection mistake
·PCB faulty
Troubleshooting
Check if the connections and
power supply are normal.
Correct the connections. Turn on the
unit when the power supply is good.
No
Yes
Indoor main PCB is
defective. Replace indoor
main PCB.
20
DIAGNOSIS AND SOLUTION (CONT)
Fan speed has been out of control diagnosis and solution (E3/F5)
Error Code
E3/F5
Malfunction decision conditions
When indoor fan speed remains too low (300RPM) for certain time, the unit stops and the LED
displays the failure.
Supposed causes
·Wiring mistake
·Fan ass'y faulty
·Fan motor faulty
·PCB faulty
Troubleshooting
Power off, then restart the
unit 2 minutes later
No
The unit operates normally.
No
Find the cause and resolve it.
No
Correct the connections.
No
Replace the main PCB
Yes
Shut off the power supply,
Rotate the fan by hand.
Yes
Check the fan motor wiring
Yes
Measure the voltage for the
fan motor from the main
PCB
Yes
Replace the fan motor
No
21
DIAGNOSIS AND SOLUTION (CONT)
Index 1
1 Indoor or Outdoor DC Fan Motor (control chip is in fan motor)
S
Power on and when the unit is in standby, measure the voltage of pin1−pin3, pin4−pin3 in fan motor connector. If the voltage value
is not in the range shown in Table 11 or Table 12, the PCB has an issue and needs to be replaced.
Fig. 25 – Motor Connector
Table 11—DC motor voltage input and output (voltage: 220−240V~)
NO.
1
2
3
COLOR
Red
--Black
SIGNAL
Vs/Vm
--GND
VOLTAGE
280V~380V
--0V
4
5
6
White
Yellow
Blue
Vcc
Vsp
FG
14-17.5V
0~5.6V
14-17.5V
NO.
1
2
COLOR
Red
---
SIGNAL
Vs/Vm
---
VOLTAGE
140V~190V
---
3
4
5
6
Black
White
Yellow
Blue
GND
Vcc
Vsp
FG
0V
14-17.5V
0~5.6V
14-17.5V
Table 12—DC motor voltage input and output (voltage : 115V~)
2 . Outdoor DC Fan Motor (control chip is in the outdoor PCB)
S
Power on the unit and check if the fan runs normally. If the fan runs normally, the PCB has an issue and needs to be replaced. If the
fan does not run normally, measure the resistance of each two pins. If the resistance is not equal to each other, the fan motor has an
issue and needs to be replaced, otherwise the PCB has an issue and needs to be replaced.
3 Indoor AC Fan Motor
S
Power on the unit and set the unit in FAN mode at the high fan speed. Run for 15 seconds then measure the voltage of pin1 and
pin2. If the voltage value is less than 100V(208~240V power supply) or 50V(115V power supply), the PCB has an issue and needs
to be replaced.
22
DIAGNOSIS AND SOLUTION (CONT)
Open circuit or short circuit of temperature sensor diagnosis and solution (E4/E5/F1/F2/F3)
Error Code
E4/E5/F1/F2/F3
Malfunction decision conditions
If the sampling voltage is lower than 0.06V or higher than 4.94V, the LED displays the failure.
·Wiring mistake
·Sensor faulty
·PCB faulty
Supposed causes
Troubleshooting
Check the connection
between the temperature
sensor and PCB.
No
Correct the connection
No
Replace the sensor
Yes
Measure the resistance
value of the sensor
Yes
Replace indoor or outdoor
main PCB
Fig. 26 – Check the connection
23
DIAGNOSIS AND SOLUTION (CONT)
Refrigerant Leakage Detection diagnosis and solution (EC)
Error Code
EC
Malfunction decision conditions
Define the evaporator coil temp.T2 of the compressor. It starts running in Tcool.
At first, 5 minutes after the compressor starts up, if T2 <Tcool-35.6_F (Tcool-2 _C) does not
run for 4 seconds and this situation occurs 3 times, the display area displays“EC”and the air
conditioner will turn off.
Supposed causes
·T2 sensor faulty
·Indoor PCB faulty
·System problems, such as leakage or blocking.
Troubleshooting
Power off, then restart the
unit 2 minutes later.
Yes
Check cool air blowing out
from indoor air outlet
Yes
Check the T2 sensor
No
Yes
Check for system leaks
Replace indoor PCB.
No
Yes
Check for system blocking and
clear the block
24
Repair the leakage and
recharge the refrigerant.
DIAGNOSIS AND SOLUTION (CONT)
Overload current protection diagnosis and solution (F0)
Error Code
F0
Malfunction decision conditions
An abnormal current rise is detected by checking the specified current detection circuit.
Supposed causes
·Power supply problems
·System blockage
·PCB faulty
·Wiring mistake
·Compressor malfunction
Troubleshooting
Check the power supply
No
Stop the unit
No
Clear the blockage
No
Replace the compressor
No
Correct the connections or
replace the wires.
No
Replace outdoor main PCB
Yes
Check for system blockage
Yes
Check the compressor
resistance values
Yes
Check the connections and
wires
Yes
Check the reactor
Yes
Replace the outdoor unit
25
DIAGNOSIS AND SOLUTION (CONT)
IPM malfunction or IGBT over−strong current protection diagnosis and solution (P0)
Error Code
P0
Malfunction decision conditions
When the voltage signal, that the IPM sends to the compressor drive chip is abnormal, the display
LED displays P0”and the air conditioner turns off.
Supposed causes
·Wiring mistake
·IPM malfunction
·Outdoor fan ass'y faulty
·Compressor malfunction
·Outdoor PCB faulty
Troubleshooting
Check the wiring between main the
PCB and the compressor
Yes
Correct the connection or replace
the wires and connectors.
No
Replace the IPM board or replace
the main PCB
No
Please refer to the solution of ǏFan
Speed Has Been Out Of Controlǐ
malfunction
No
Replace the compressor.
No
Check the IPM
Yes
Check the outdoor fan and the
outdoor unit ventilation
Yes
Check the compressor resistance
values
Yes
Replace the outdoor main PCB
26
DIAGNOSIS AND SOLUTION (CONT)
Fig. 27 – P−U
Fig. 28 – P−V
27
DIAGNOSIS AND SOLUTION (CONT)
Fig. 29 – P−W
Fig. 30 – N−U
28
DIAGNOSIS AND SOLUTION (CONT)
Fig. 31 – N−V
Fig. 32 – N−W
29
DIAGNOSIS AND SOLUTION (CONT)
Over voltage or too low voltage protection diagnosis and solution (P1)
Error Code
P1
Malfunction decision conditions
An abnormal voltage rise or drop is detected by checking the specified voltage detection circuit.
Supposed causes
·Power supply problems
·System leakage or block
·PCB faulty
Troubleshooting
Check the power supply
No
Stop the unit
No
Correct the connections or
replace the wires.
No
Replace the IPM board
No
Replace outdoor main PCB
Yes
Check the connections and
wires
Yes
Check the voltage between P
and N
Yes
Check the reactor
Yes
Replace the reactor
Fig. 33 – Test
NOTE: Measure the DC voltage between the P and N port. The normal value should be around 310V.
30
DIAGNOSIS AND SOLUTION (CONT)
High temperature protection of compressor top diagnosis and solution (P2)
Error Code
P2
Malfunction decision conditions
If the sampling voltage is not 5V, the LED displays the failure.
Supposed causes
·Power supply problems
·System leakage or block
·PCB faulty
Troubleshooting
Check the air flow system
of indoor and outdoor units
Yes
Clear up the air inlet and outlet or the heat
exchanger of indoor and outdoor units.
No
Power off, then restart the unit 10
minutes later
Yes
Check the temperature
of the compressor
No
Check the overload
protector
No
Correct the connection.
No
Replace the OLP.
Yes
Yes
Check refrigerant system
Measure the resistance
between the two ports of
the OLP. Is it zero?
Yes
Yes
Replace the outdoor control PCB.
31
DIAGNOSIS AND SOLUTION (CONT)
Inverter compressor drive error diagnosis and solution (P4)
Error Code
P4
Malfunction decision conditions
An abnormal inverter compressor drive is detected by a special detection circuit, including
communication signal detection, voltage detection, compressor rotation speed signal detection,
etc..
Supposed causes
·Wiring mistake
·IPM malfunction
·Outdoor fan ass'y faulty
·Compressor malfunction
·Outdoor PCB faulty
Troubleshooting
Check the wiring between main PCB
and compressor
Yes
Correct the connection or replace
the wires and connectors.
No
Replace the IPM board or replace
the main PCB
No
Please refer to the solution of ǏFan
Speed Has Been Out Of Controlǐ
malfunction
No
Replace the compressor.
No
Check the IPM
Yes
Check the outdoor fan and the
outdoor unit ventilation
Yes
Check the compressor resistance
values
Yes
Replace the outdoor main PCB
32
Main Parts Check
Temperature Sensor Checking
Disconnect the temperature sensor from the PCB, measure the resistance value with a tester.
Fig. 34 – Tester
Temperature sensors.
Room temp.(T1) sensor,
Indoor coil temp.(T2) sensor,
Outdoor coil temp.(T3) sensor,
Outdoor ambient temp.(T4) sensor,
Compressor discharge temp.(T5) sensor.
Measure the resistance value of each winding by using the multi−meter.
33
APPENDIX
Table 13—Temperature Sensor Resistance Value Table for T1, T2, T3, T4 (_C−−K)
_C
_F
-20
-19
-18
-17
-16
-15
-14
-13
-12
-11
-10
-9
-8
-7
-6
-5
-4
-3
-2
-1
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
-4
-2
0
1
3
5
7
9
10
12
14
16
18
19
21
23
25
27
28
30
32
34
36
37
39
41
43
45
46
48
50
52
54
55
57
59
61
63
64
66
K Ohm
115.266
108.146
101.517
96.3423
89.5865
84.219
79.311
74.536
70.1698
66.0898
62.2756
58.7079
56.3694
52.2438
49.3161
46.5725
44
41.5878
39.8239
37.1988
35.2024
33.3269
31.5635
29.9058
28.3459
26.8778
25.4954
24.1932
22.5662
21.8094
20.7184
19.6891
18.7177
17.8005
16.9341
16.1156
15.3418
14.6181
13.918
13.2631
°C
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
°F
68
70
72
73
75
77
79
81
82
84
86
88
90
91
93
95
97
99
100
102
104
106
108
109
111
113
115
117
118
120
122
124
126
127
129
131
133
135
136
138
K Ohm
12.6431
12.0561
11.5
10.9731
10.4736
10
9.55074
9.12445
8.71983
8.33566
7.97078
7.62411
7.29464
6.98142
6.68355
6.40021
6.13059
5.87359
5.62961
5.39689
5.17519
4.96392
4.76253
4.5705
4.38736
4.21263
4.04589
3.88673
3.73476
3.58962
3.45097
3.31847
3.19183
3.07075
2.95896
2.84421
2.73823
2.63682
2.53973
2.44677
°C
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
34
°F
140
142
144
145
147
149
151
153
154
156
158
160
162
163
165
167
169
171
172
174
176
178
180
181
183
185
187
189
190
192
194
196
198
199
201
203
205
207
208
210
K Ohm
2.35774
2.27249
2.19073
2.11241
2.03732
1.96532
1.89627
1.83003
1.76647
1.70547
1.64691
1.59068
1.53668
1.48481
1.43498
1.38703
1.34105
1.29078
1.25423
1.2133
1.17393
1.13604
1.09958
1.06448
1.03069
0.99815
0.96681
0.93662
0.90753
0.8795
0.85248
0.82643
0.80132
0.77709
0.75373
0.73119
0.70944
0.68844
0.66818
0.64862
°C
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
°F
212
214
216
217
219
221
223
225
226
228
230
232
234
235
237
239
241
243
244
246
248
250
252
253
255
257
259
261
262
264
266
268
270
271
273
275
277
279
280
282
K Ohm
0.62973
0.61148
0.59386
0.57683
0.56038
0.54448
0.52912
0.51426
0.49989
0.486
0.47256
0.45957
0.44699
0.43482
0.42304
0.41164
0.4006
0.38991
0.37956
0.36954
0.35982
0.35042
0.3413
0.33246
0.3239
0.31559
0.30754
0.29974
0.29216
0.28482
0.2777
0.27078
0.26408
0.25757
0.25125
0.24512
0.23916
0.23338
0.22776
0.22231
APPENDIX (CONT)
Table 14—Temperature Sensor Resistance Value Table for T1,T2,T3,T4 (_C−−K)
°C
-20
-19
-18
-17
-16
-15
-14
-13
-12
-11
-10
-9
-8
-7
-6
-5
-4
-3
-2
-1
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
°F
-4
-2
0
1
3
5
7
9
10
12
14
16
18
19
21
23
25
27
28
30
32
34
36
37
39
41
43
45
46
48
50
52
54
55
57
59
61
63
64
66
K Ohm
542.7
511.9
483
455.9
430.5
406.7
384.3
363.3
343.6
325.1
307.7
291.3
275.9
261.4
247.8
234.9
222.8
211.4
200.7
190.5
180.9
171.9
163.3
155.2
147.6
140.4
133.5
127.1
121
115.2
109.8
104.6
99.69
95.05
90.66
86.49
82.54
78.79
75.24
71.86
°C
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
°F
68
70
72
73
75
77
79
81
82
84
86
88
90
91
93
95
97
99
100
102
104
106
108
109
111
113
115
117
118
120
122
124
126
127
129
131
133
135
136
138
K Ohm
68.66
65.62
62.73
59.98
57.37
54.89
52.53
50.28
48.14
46.11
44.17
42.33
40.57
38.89
37.3
35.78
34.32
32.94
31.62
30.36
29.15
28
26.9
25.86
24.85
23.89
22.89
22.1
21.26
20.46
19.69
18.96
18.26
17.58
16.94
16.32
15.73
15.16
14.62
14.09
°C
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
35
°F
140
142
144
145
147
149
151
153
154
156
158
160
162
163
165
167
169
171
172
174
176
178
180
181
183
185
187
189
190
192
194
196
198
199
201
203
205
207
208
210
K Ohm
13.59
13.11
12.65
12.21
11.79
11.38
10.99
10.61
10.25
9.902
9.569
9.248
8.94
8.643
8.358
8.084
7.82
7.566
7.321
7.086
6.859
6.641
6.43
6.228
6.033
5.844
5.663
5.488
5.32
5.157
5
4.849
4.703
4.562
4.426
4.294
4.167
4.045
3.927
3.812
°C
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
°F
212
214
216
217
219
221
223
225
226
228
230
232
234
235
237
239
241
243
244
246
248
250
252
253
255
257
259
261
262
264
266
K Ohm
3.702
3.595
3.492
3.392
3.296
3.203
3.113
3.025
2.941
2.86
2.781
2.704
2.63
2.559
2.489
2.422
2.357
2.294
2.233
2.174
2.117
2.061
2.007
1.955
1.905
1.856
1.808
1.762
1.717
1.674
1.632
APPENDIX (CONT)
Table 15—ΔT(° F)=9ΔT(° C)/5
°C
-5
-4
-3
-2
-1
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
°F
23
24.8
26.6
28.4
30.2
32
32.9
33.8
34.7
35.6
36.5
37.4
38.3
39.2
40.1
41
42.8
44.6
46.4
48.2
50
51.8
53.6
55.4
57.2
59
60.8
62.6
64.4
66.2
68
°C
21
22
23
24
25
25.5
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
°F
69.8
71.6
73.4
75.2
77
77.9
78.8
80.6
82.4
84.2
86
87.8
89.6
91.4
93.2
95
96.8
98.6
100.4
102.2
104
105.8
107.6
109.4
111.2
113
114.8
116.6
118.4
120.2
122
°C
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
°F
123.8
125.6
127.4
129.2
131
132.8
134.6
136.4
138.2
140
141.8
143.6
145.4
147.2
149
150.8
152.6
154.4
156.2
158
159.8
161.6
163.4
165.2
167
168.8
170.6
172.4
174.2
176
177.8
36
°C
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
°F
179.6
181.4
183.2
185
186.8
188.6
190.4
192.2
194
195.8
197.6
199.4
201.2
203
204.8
206.6
208.4
210.2
212
213.8
215.6
217.4
219.2
221
222.8
224.6
226.4
228.2
230
231.8
233.6
°C
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
°F
235.4
237.2
239
240.8
242.6
244.4
246.2
248
249.8
251.6
253.4
255.2
257
258.8
260.6
262.4
264.2
266
267.8
269.6
271.4
273.2
275
276.8
278.6
280.4
282.2
284
285.8
287.6
289.4
IPM Continuity Check
Turn off the power, let the large capacity electrolytic capacitors discharge completely, and dismount the IPM. Use a digital tester to measure
the resistance between P and UVWN; UVW and N.
Table 16—Digital Tester
NORMAL RESISTANCE
VALUE
DIGITAL TESTER
(+)Red
P
(-)Black
N
U
V
W
DIGITAL TESTER
(+)Red
U
V
W
(+)Red
∞
(Several MΩ)
NORMAL RESISTANCE
VALUE
(-)Black
N
∞
(Several MΩ)
Indoor AC Fan Motor
Measure the resistance value of each winding by using the tester.
Table 17—Resistance Value
POSITION
RESISTANCE VALUE
RPG13B
Black - Red
White - Black
100.5Ω±8%
(20°C /68°F)
(Brand: Weiling)
64.5Ω±8%
(20°C /68°F)
(Brand: Weiling)
100Ω±8%
(20°C /68°F)
(Brand: Dayang)
68.5Ω±8%
(20°C /68°F)
(Brand: Dayang)
37
RPG50B (YKFG-50-4-1)
82.2Ω±8%
85Ω±8%
(20°C /68°F)
(20°C /68°F)
(Brand: Weiling)
(Brand: Dayang)
72.3Ω±8%
57.8Ω±8%
(20°C /68°F)
(20°C /68°F)
(Brand: Weiling)
(Brand: Dayang)
DISASSEMBLY INSTRUCTIONS
NOTE: This part is for reference, the photos may have slight difference with your unit.
No.
Parts name
Procedures
Remarks
1
Front panel
How to remove the front
panel.
Overview:
1)
2)
3)
Pull the bottom side of
the panel and release
the clips. Then
remove the front
panel.
Remove the filter and
horizontal louver.
Panel
One screw
fixing the cover
Clip
Clip
Remove the four
screws.
Filter
4) Remove the cover
(one screw).
5) Lift the panel frame
and release the
connector of display
assembly.
Then remove the
panel frame assembly.
Four screws
Connector for
display ass’y
38
DISASSEMBLY INSTRUCTIONS (CONT)
2
Electrical
parts
How to remove the
electrical parts.
1) After removing the
front panel (see
section 1), pull out the
room temperature
sensor and
evaporator coil
sensor. Remove the
grounding screws.
2)
Pull out the clip toward
the left side and open
the cover.
3)
Remove the securing
screw and open the
box cover.
Room temp.
Grounding screws
sensor
Swing motor
Clip for electronic
Evaporator coil
control box cover
temp. sensor
4) Pull out the connectors
of the swing motor
and the fan motor.
5)
Remove the securing
screw and remove
the electronic control
box and air outlet
assembly.
Fan motor connector
and swing motor
39
Fixing screw
DISASSEMBLY INSTRUCTIONS (CONT)
3
Evaporator
How to remove the
evaporator.
1) After removing
the front panel
assembly and
electrical parts
(sections 1 and 2),
remove the pipe holder
at the rear side of the
unit.
2) Remove the two
screws on the
evaporator at the base
bearing side.
3) Remove the two
screws on the
evaporator at the fixed
plates and then lift the
evaporator ass’y.
Two screws at the base bearing side
Two
screws at
the fixed
plates
40
DISASSEMBLY INSTRUCTIONS (CONT)
4
Fan and
motor
How to remove the fan
and motor.
1) After removing the
evaporator assembly
(see sections 1 - 3),
remove the three (3)
screws securing the
cover.
2)
Remove the screw
securing the motor
and then pull out the
motor.
Three screws
One screw
41
Copyright 2016 Carrier Corporation. S 7310 W. Morris St. S Indianapolis, IN 46231
Edition Date: 08/16
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
42
Catalog No.40MAQ-01SM
Replaces: NEW