Carrier 40MPHA, 38MPRAQ09AA3, 38MPRAQ12AA3 Service Manual
40MPHA
High Wall Ductless System
Sizes 09 to 12
Service Manual
TABLE OF CONTENTS
PAGE
SAFETY CONSIDERATIONS 1.........................
INTRODUCTION 1...................................
MODEL/SERIAL NUMBER NOMENCLATURES 2.........
SPECIFICATIONS 3...................................
COMPATIBILITY 3...................................
DIMENSIONS 4.....................................
CLEARANCES 5.....................................
ELECTRICAL DATA 6................................
WIRING 6...........................................
CONNECTION DIAGRAM 6...........................
WIRING DIAGRAM 7.................................
FAN AND MOTOR SPECIFICATIONS 7..................
REFRIGERATION CYCLE DIAGRAM 8..................
REFRIGERANT LINES 9..............................
SYSTEM EVACUATION AND CHARGING 9..............
OPERATION MODES AND FUNCTIONS 10..............
TROUBLESHOOTING 15..............................
ERROR DIAGNOSIS AND TROUBLESHOOTING 17.......
QUICK MAINTENANCE BY ERROR CODE 21............
TROUBLESHOOTING BY ERROR CODE 22..............
DIAGNOSIS AND SOLUTION 23.......................
DISASSEMBLY INSTRUCTIONS 36.....................
APPENDICES 46.....................................
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. W ear 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 un it and in instructions or manuals,
be alert to the potential for personal injury. Understand these signal
words: DANGER, W ARNI NG, a nd CAUTION.
!
These words are used with the safety−alert symbol. DANGER
identifies the most seriou s hazard s which will result in severe personal
injury or death. W ARNING sign ifies hazards which could result in
personal injury or death. CAUTION is used to identify unsafe
practices w hich 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.
!
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.
!
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.
WARNING
!
WARNING
EXPLOSION HAZARD
Failure to follow this warning could
result in death, serious personal injury,
and/or property damage.
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
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 VOLTAGE/PH/HZ INDOOR MODEL
9
12 40MPHAQ12XA3
40 MP
40 = FAN COIL UNIT
MP = MODEL
208-230/1/60
INDOOR UNIT
AH09
Q
X
40MPHAQ09XA3
A
3
VOLTAGE
3 = 208/230-1-60
SYSTEM TYPE
H = HIGH WALL
MAJOR SERIES
INDOOR FAN COIL TYPE
Q = HEAT PUMP
Week of Manufacture
Year of Manufacture
01 17
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.
V
V = ALL MODELS
10001
Sequential Serial Number
A = VARIATION
X = NOT USED
NOMINAL CAPACITY
09 - 3/4 TON
12 - 1 TON
2
SPECIFICATIONS
Table 2—Specifications
HEAT PUMP
System
Electrical
Controls
Operating Range
Piping
Indoor Coil
Indoor
Performance may vary based on the outdoor unit matched to. See Table 3 for compatible outdoor units.
SIZE 9 12
Indoor Model 40MPHAQ09XA3 40MPHAQ12XA3
Voltage, Phase, Cycle V/Ph/Hz 208/230-1-60 208/230-1-60
Power Supply Indoor unit powered from outdoor unit
MCA A. 0.2 0.2
Wireless Remote Controller (° F/° C Convertible) Standard Standard
Wired Remote Controller (° F/° C Convertible) Optional Optional
Cooling Indoor DB Min - Max °F(°C) 63~ 86 (17~ 30) 63~ 86 (17~ 30)
Heating Indoor DB Min - Max °F(°C) 32~ 86 (0~ 30) 32~ 86 (0~ 30)
Pipe Connection Size - Liquid in (mm) 1/4 (6.35) 1/4 (6.35)
Pipe Connection Size - Suction in (mm) 3/8 (9.52) 1/2 (12.7)
Face Area (sq. ft.) Sq. Ft. 2.2 2.2
No. Rows 4 4
Fins per inch 21 21
Circuits 5 5
Unit Width in (mm) 35.2 (895) 35.2 (895)
Unit Height in (mm) 11.7 (298) 11.7 (298)
Unit Depth in (mm) 9.8 (248) 9.8 (248)
Net Weight lbs (kg) 29 (13) 29 (13)
Fan Speeds 4 4
Airflow (lowest to highest) CFM 144/245/295/345 168/252/306/357
Sound Pressure (lowest to highest) dB(A) 29/46 31/47
Air Throw Data ft (m) 22 (6.7) 23 (7)
COMPATIBILITY
Outdoor Unit Single Zone 38MPRAQ09AA3 38MPRAQ12AA3
Outdoor Unit Multi-zone
T able 3—Compatibility
Indoor Unit 40MPHAQ09XA3 40MPHAQ12XA3
38MGRQ18B--3
38MGRQ24C--3
38MGRQ30D--3
38MGRQ36D--3
38MGRQ48E--3
3
DIMENSIONS
HIGH WALL UNIT SIZE 9K 12K
Height In. (mm) 11.7 (298) 11.7 (298)
Width In. (mm) 35.2 (895) 35.2 (895)
Depth In. (mm) 9.8 (248) 9.8 (248)
Weight-Net Lbs (kg) 37.48 (17) 37.48 (17)
T able 4—Indoor Unit Dimensions
Voltage (208/230V) (208/230V)
Piping
Drain Hose
Drain Hose
Ø0.625"(16) L=25.20"(640)
NOTE: Drain adaptor included with the indoor unit to allow the use of a 3/4 in. PVC Schedule 40 where the actual outside diameter is 1.05 in.
Fig. 1 – Sizes 9K and 12K
4
CLEARANCES
CEILING
5.9in. (15cm) min.
4.75 in
(12 cm)
min.
6 ft
(1.8m)
4.75 in
(12 cm)
min.
FLOOR
Fig. 2 – Indoor Unit Clearance
NOTE: The top clearance recommended for proper return airflow is 5.9in (15cm). Reduction of this clearance may decrease the performance
of these units. This may be reduced to 3.2in (80mm) as long as the right and left clearances are achieved.
5
ELECTRICAL DATA
Table 5—Electrical Data Indoor High Wall
HIGH WALL
UNIT SIZE
9K
12K 0.23 0.027
*Permissible limits of the voltage range at which the unit will operate satisfactorily.
LEGEND
FLA - Full Load Amps
V-Ph-Hz FLA HP
208/230-1-60
INDOOR FAN
0.23 0.027 Refer to outdoor unit installation instructions –
WIRING
All wires must be sized per NEC (National Electrical Code) or
CEC (Canadian Electrical Code) and local codes. Use 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 insulation rating wire must be used.
Recommended Connection Method for Power and
Communication Wiring:
The main power is supplied to the outdoor unit. The field supplied
14/3 stranded wire with ground with a 600 volt insulation rating,
power/communication wiring from the outdoor unit to indoor unit
consists of four (4) wires and provides the power for the indoor
unit. Two wires are line voltage AC power, one is communication
wiring (S) and the other is a ground wire. Wiring between indoor
and outdoor unit is polarity sensitive. The use of BX wire is NOT
recommended.
If installed in a high Electromagnetic field (EMF) area and
communication issues exists, a 14/2 stranded shielded wire can be
used to replace L2 and (S) between outdoor unit and indoor unit
landing the shield onto ground in the outdoor unit only.
MAX FUSE CB AMP
Indoor unit powered by the outdoor unit
!
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
Wires should be sized based on NEC and local codes.
Use copper conductors only with a 600 volt insulation
rating wire.
!
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage
or improper operation.
Be sure to comply with local codes while running wire from
the indoor unit to the outdoor unit.
Every wire must be connected firmly. Loose wiring may cause
the terminal to overheat or result in unit malfunction. A fire
hazard may also exist. Ensure all wiring is tightly connected.
No wire should touch the refrigerant tubing, compressor or
any moving parts.
Disconnecting means must be provided and shall be located
within sight and readily accessible from the air conditioner.
Connecting cable with conduit shall be routed through the
hole in the conduit panel.
CAUTION
CAUTION
CONNECTION DIAGRAM
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 polarity sensitive and improper wiring will result in a fault code.
Fig. 3 – 208−230V
6
WIRING DIAGRAM
INDOOR WIRING DIAGRAM
INDOOR
FAN
M
M
M
Y/G
RED
BLUE(BLACK)
YELLOW
L1
L2
- - - -
This symbol indicates the
element is optional,the actual
shape shall prevail.
JX1
S
INDOOR UNIT
OUTDOOR UNIT
5
L-OUT
RY1
CN3
MAIN BOARD
CN32
2
CN43
CN45
To Remote Alarm
CN40
CN46
To Remote Switch
4
3
P1_1
L-IN
N-IN
CN5
MULTI-FUNCTION CONTROL BOARD
CN42
CN41
E
12V/5V
X Y
To 485 Wire-controller
Fig. 4 – Wiring Diagram Sizes 09−12 (208−230V)
CN10
CN1
DISPLAY BOARD
CN4
ROOM TEMPERATURE SENSOR
5
CN20
CN5
CN3
CN2
CN6
SWING MOTOR2
CN8
CN6
5
5
SWING MOTOR3
PIPE TEMPERATURE SENSOR
Moving Sensor
Humidity Sensor
FAN AND MOTOR SPECIFICATIONS
T able 6—Fan and Motor Specifications
High Wall Unit Size
Material glass fiber+AS glass fiber+AS
High Wall Fan
High Wall
Fan Motor
Type GL-108*670-IN GL-108*670-IN
Diameter In (mm) 4.25(108) 4.25(108)
Height In (mm) 26.38(670) 26.38(670)
Model ZKFP-20-8-6-7 ZKFP-20-8-6-7
Volts V 208/230 208/230
Phase 1 1
Hertz 60 60
FLA 0.034 0.034
Type DC DC
Insulation class E E
Safe class IPX0 IPX0
Input W 50 50
Output W 20 20
Range of current Amps 0.023 0.023
Rated current Amps 0.023±10% 0.023±10%
Capacitor µF No Capacitor
Rated HP HP 0.027 0.027
Speed rev/min 1000/850/650 1050/900/650
Rated RPM rev/min 1000 1050
Max. input W 70 70
9K
(208/230V)
12K
(208/230V)
7
REFRIGERATION CYCLE DIAGRAM
INDOOR OUTDOOR
HEAT
EXCHANGE
(EVAPORATOR)
T2 Evaporator
temp. sensor
T1 Room temp.
sensor
LIQUID SIDE
2−WAY VALVE
GAS SIDE
3−WAY VALVE
ACCUMULATOR
CHECK VALVE
(Heating Model only)
CAPILIARY TUBE
COMPRESSOR
HEAT
EXCHANGE
(CONDENSER)
4−WAY VALVE
COOLING
HEATING
Fig. 5 – Heat Pumps
8
REFRIGERANT LINES
t
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.
SYSTEM EVACUATION AND
CHARGING
!
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
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.
System Vacuum and Charge
Using Vacuum Pump
1 Completely tighten flare nuts on the line set at both the
indoor and outdoor units. DO NOT open the service valves
on the outdoor unit for the new installation or the
replacement unit. Open the service valves on the outdoor
unit if repairs have been made to the refrigerant sealed
system. Connect the manifold gauge low pressure hose to
the charge port of the gas side service valve (see Fig. 6).
2 Connect the charge hose to the vacuum pump.
3 Fully open the low pressure valve of manifold gage (see
Fig. 7).
4 Start the vacuum pump.
5 Evacuate using deep vacuum or triple evacuation method.
6 After evacuation is complete, fully close the pressure valve
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. If vacuum is complete per
Fig. 10 or 11, open service valves to release factory charge
into the system.
8 Disconnect the charge hose from the charge connection of
the gas side service valve.
9 Securely tighten the service valve caps.
Outdoor Unit
Service Valve
500 microns
Low pressure valve
Low pressure hose
CAUTION
Refrigerant
Gas Side
A
Liquid Side
B
Fig. 6 – Service Valve
Manifold Gage
High side valve
Charge hose
Indoor Uni
C
D
Vacuum pump
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. 8).
5000
4500
4000
3500
3000
2500
2000
MICRONS
1500
1000
500
01234567
MINUTES
LEAK IN
SYSTEM
V ACUUM TIGHT
TOO WET
TIGHT
DRY SYSTEM
Fig. 8 – Deep Vacuum Graph
Triple Evacuation Method
The triple evacuation method should be used. Refer to Fig. 9 and
proceed as follows:
1 Pump the system down to 1500 microns and allow the
pump to continue operating for an additional 15 minutes.
2 Close the service valves and shut off the vacuum pump.
3 Connect a dry nitrogen cylinder and regulator to the system
and break vacuum until the system reaches 2 psig.
4 Close the service valve and allow the system to stand for
1hr. During this time, the dry nitrogen can diffuse
throughout the system absorbing moisture.
5 Pump the system down to 1000 microns.
6 Break the vacuum with dry nitrogen (2 psig).
7 Pump the system down to 500 microns.
8 Perform the hold test for 30 minutes.
EVACUATE TO 1500 MICRONS
BREAK VACUUM WITH DRY NITROGEN TO 2 PSIG
EVACUATE TO 1000 MICRONS
BREAK VACUUM WITH DRY NITROGEN TO 2 PSIG
EVACUATE TO 500 MICRONS MINIMUM (HOLD FOR 30 MINUTES)
CHECK FOR TIGHT, DRY SYSTEM
(IF IT HOLDS DEEP VACUUM)
RELEASE CHARGE INTO SYSTEM BY OPENING VALVES COMPLETELY
Fig. 9 – 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.
Gas side valve
Fig. 7 – Manifold
9
OPERATION MODES AND FUNCTIONS
Abbreviation
T able 7—Unit Element Abbreviations
Abbreviation Element
T1 Indoor room temperature
T2 Evaporator Coil temperature
T3 Condenser Coil temperature
T4 Outdoor ambient temperature
Ts c Adjusted setting temperature
TP Compressor discharge temperature
Display Function
Unit Display Functions
Fig. 10 – Unit Display Functions
Safety Features
Compressor Three−Minute Delay at Restart
Compressor functions are delayed for up to ten seconds upon the
first start−up of the unit, and are delayed for up to three minutes
upon subsequent unit restarts.
Automatic shutoff based on discharge temperature
If the compressor discharge temperature exceeds 226_F (108_C)
for nine seconds, the compressor ceases operation.
Automatic shutoff based on fan speed
If the indoor fan speed registers below 300RPM or over 1500RPM
for an extended period of time, the unit ceases operation and the
corresponding error code is displayed on the indoor unit.
Inverter module protection
The inverter module has an automatic shutoff mechanism based on
the unit’s current, voltage, and temperature. If automatic shutoff is
initiated, the corresponding error code is displayed on the indoor
unit and the unit ceases operation.
Indoor fan delayed operation
S When the unit starts, the louver is automaticallyactivated
and the indoor fan will operate after a period of setting
time or when the louver is in place.
S If the unit is in HEATING mode, the indoor fan is
regulated by the anti−cold wind function.
Compressor Preheating
Preheating is automatically activated when the T4 sensor is lower
than setting temperature.
Sensor redundancy and automatic shutoff
S If one temperature sensor malfunctions, the air
conditioner continues operation and displays the
corresponding error code, allowing for emergency use.
S When more than one temperature sensor malfunctions,
the air conditioner ceases operation.
T able 8—Unit Function Displays
Function Display
Temperature Set temperature value
Temperature
(FAN and DRYING mode)
Activation of Timer ON,
Fresh, Swing, Turbo, or
Silent
Cancellation of Timer
OFF, Fresh, Swing,
Turbo, or Silent
Defrost
Warming in heating
mode
Self-clean
Heating in room
temp under
46°F (8°C) or 54°F (12°C)
Fresh (Not available on
these systems)
ECO function
WiFi control (
on these systems)
The current operation
power (Not available on
these systems)
Not available
Room temperature
(3s)
(3s)
kW
10
FAN Mode
When the FAN mode is activated:
S The outdoor fan and compressor stop.
S Temperature control is disabled and the indoor room
temperature is displayed.
S The indoor fan speed can be set to 1%~100%, or AUTO.
S The louver operations are identical to those in
COOLING mode.
S Auto fan: In FAN−ONLY mode, the AC operates the
same as auto fan in the COOLING mode with the
temperature set at 75
_F 24_C (Tsc =75_F (24_C).
COOLING Mode
Compressor Control
Reach the configured temperature:
1 When the compressor runs continuously for less than 120
minutes.
S If the following conditions are satisfied, the compressor
ceases operation.
S While the calculated frequency(fb) is less than the
minimum limit frequency(FminC).
S While protective time is more than or equal to ten
minutes.
S While T1 is lower than or equal to
(T sc−CDIFTEMP 31
NOTE: CDIFTEMP is the EEPROM setting parameter. It is
35.6_F (2_C) usually.
2 When the compressor runs continuously for more than 120
minutes.
_F (−0.5_C)
S If the following conditions are satisfied, the compressor
ceases operation.
S When calculated frequency(fb) is less than
minimum limit frequency(FminC).
S When protective time is more than or equal to ten
minutes.
S When T1 is lower than or equal to
(Tsc−CDIFTEMP).
NOTE: CDIFTEMP is the EEPROM setting parameter. It is
35.6_F (2_C) usually.
3 If one of the following conditions is satisfied, regardless of
time.
S Compressor running frequency is more than the test
frequency.
S When the compressor running frequency is equal to the
test frequency, T4 is more than 59_ F (15_C) or no T4 or
T4 fault.
S Change setting temperature
S Turbo or sleep function on/off
S Various frequency limit shutdown occurs
NOTE: CDIFTEMP is EEPROM setting parameter. It is 35.6_F
(2
_C) usually.
Indoor Fan Control
1 In the COOLING mode, the indoor fan operates
continuously. The fan speed can be set to 1%−100%, or
AUTO.
2 AUTO fan
S Descent Curve
S When T1−T sc is lower than or equal to 38_F
_C), fan speed reduces to 80%;
(3.5
S When T1−T sc is lower than or equal to 34_F
_C), fan speed reduces to 60%;
(1
S When T1−T sc is lower than or equal to 33_F
_C), fan speed reduces to 40%;
(0.5
S When T1−T sc is lower than or equal to 32_F
(0_C), fan speed reduces to 20%;
S When T1−T sc is lower than or equal to 31_F
_C), fan speed reduces to 1%.
(−0.5
S Rise Curve
S When T1−Tsc is higher than 32_F (0_C), fan
speed increases to 20%;
S When T1−Tsc is higher than 33_F (0.5_C), fan
speed increases to 40%;
S When T1−Tsc is higher than 34_F (1_C), fan
speed increases to 60%;
S When T1−Tsc is higher than 35_F (1.5_C), fan
speed increases to 80%;
S When T1−Tsc is higher than 39_F (4_C), fan
speed increases to 100%.
Outdoor Fan Control
S The outdoor unit runs at a different fan speed according
to T4 and the compressor running frequency.
S For different outdoor units, the fan speeds are different.
Condenser Temperature Protection
When the condenser temperature exceeds a configured value, the
compressor ceases operations.
Evaporator Temperature Protection
When the evaporator temperature drops below a configured value,
the compressor and outdoor fan ceases operations.
11
HEATING Mode
Compressor Control
1 Reach the configured temperature:
S If the following conditions are satisfied, the compressor
ceases operation.
S While the calculated frequency(fb) is less than the
minimum limit frequency(FminC).
S When the protective time is more than or equal to
ten minutes.
S When T1 is higher than or equal to
Tsc+HDIFTEMP2.
NOTE: HDIFTEMP2 is the EEPROM setting parameter. It is
_F (2_C) usually.
35.6
S If one of the following conditions is satisfied, regardless
of time.
S Compressor running frequency is more than test
frequency.
S When the compressor running frequency is equal
to the test frequency, T4 is more than 59
no T4 or T4 fault.
_F (15_C) or
S Change the setting temperature.
S Turbo or sleep function on or off.
2 When the current is higher than the predefined safe value,
the surge protection is activated, causing the compressor to
cease operations.
Indoor Fan Control
1 In the HEATING mode, the indoor fan operates
continuously. The fan speed can be set to 1%−100%, or
muted.
2 AUTO fan
S Rise curve
S When T1−Tsc is higher than 29_F (−1.5_C), fan
speed reduces to 80%;
S When T1−Tsc is higher than 32_F (0_C), fan
speed reduces to 60%;
S When T1−Tsc is higher than 33_F (0.5_C), fan
speed reduces to 40%;
S When T1−Tsc is higher than 34_F (1_C), fan
speed reduces to 20%.
S Descent curve
S When T1−T sc is lower than or equal to 33_F
_C), fan speed increases to 20%;
(0.5
S When T1−T sc is lower than or equal to 32_F
_C), fan speed increases to 60%;
(0
S When T1−T sc is lower than or equal to 29_F
_C), fan speed increases to 80%;
(−1.5
S When T1−T sc is lower than or equal to 27_F
(−3_C), fan speed increases to 100%.
Outdoor Fan Control
S The outdoor unit runs at a different fan speed according
to T4 and compressor running frequency.
S For different outdoor units, the fan speeds differ.
DEFROSTING Mode
S The unit enters defrosting mode according to changes in
the temperature value of T3, T4 as well as the
compressor running time.
S In defrosting mode, the compressor continues to run, the
indoor and outdoor motor will cease operation, the
defrost light of the indoor unit will turn on, and the
symbol appears.
“ ”
S If any one of the following conditions is satisfied,
defrosting ends and the machine switches to the normal
HEATING mode:
S T3 rises above TCDE1_C.
S T3 maintained above TCDE2_C for 80 seconds.
S Unit runs for 15 minutes consecutively in the
DEFROSTING mode.
Evaporator Temperature Protection
S Off: Compressor stops.
S Decrease: Decrease the running frequency to the lower
level per 20 seconds.
S Hold: Keep the current frequency.
S Resume: No limitation for frequency.
AUTO Mode
S
This mode can be selected with the remote controller
and the setting temperature can be changed between
61_F~86_F (16_C~30_ C).
S In the AUTO mode, the machine selects the COOLING,
HEATING, AUTO−DRYING or FAN−ONY mode on
the basis of T1,Ts, T4 and relative humidity .
S If the setting temperature is modified, the machine selects
a new running function.
DRY Mode
In the DRY mode, the air conditioner operates the same as auto fan
in the COOLING mode.
1 Mute function is active.
S All protections are activated and operate the same as they
do that in COOLING mode.
2 Low Room Temperature Protection
S If the room temperature is lower than 10_C, the
compressor ceases operations and does not resume until
the room temperature exceeds 12
_C.
12
Forced Operation Function
S
Forced COOLING Mode:
The compressor and outdoor fan continue to run and the indoor fan
runs at rated speed. After running for 30 minutes, the air
conditioner switches to AUTO mode with a preset temperature of
24
_C.
S Forced AUTO Mode:
Forced auto mode operates the same as normal AUTO mode with
a preset temperature of 24_C.
S The unit exits the forced operation when it receives the
following signals:
S Switch on
S Switch off
S Timer on
S Timer off
S Changes in:
S Mode
S Fan Speed
S Setting Temperature
Timer Function
S
The Timing range is 24 hours.
S Timer on. The machine will turn on automatically when
reaching the setting time.
S Timer off. The machine will turn off automatically when
reaching the setting time.
S Timer on/off. The machine will turn on automatically
when reaching the setting “on” time, and then turn off
automatically when reaching the setting “off” time.
S Timer off/on. The machine will turn off automatically
when reaching the setting “off” time, and then turn on
automatically when reaching the setting “on” time.
S The timer function will not change the AC current
operation mode. Suppose AC is off now, it will not start
up firstly after setting the “timer off” function. And when
reaching the setting time, the timer LED will be off and
the AC running mode has not been changed.
S The setting time is relative time.
S The AC will quit the timer function when it has
malfunction
SLEEP Function
S
The SLEEP function is available in COOLING,
HEATING, or AUTO modes.
S The operational process for sleep mode is as follows:
S When cooling, the temperature rises 34_F (1_C)
(to not higher than 86
hours, the temperature stops rising and the indoor fan is
fixed at low speed.
_F (30_C) every hour. After 2
S When heating, the temperature decreases 34_F
_C) (to not lower than 61_F (16_C)) every hour.
(1
After 2 hours, the temperature stops decreasing and the
indoor fan is fixed at low speed. Anti−cold wind
function takes priority.
S The operating time for the SLEEP mode is 8 hours, after
which, the unit exits this mode and turns off.
S The timer setting is available in this mode.
Auto−Restart Function
S
The indoor unit has an auto−restart module that allows
the unit to restart automatically. The module
automatically stores the current settings and, in the case
of a sudden power failure, will restore those setting
automatically within 3 minutes after power returns.
S If there is a power failure while the unit is running, the
compressor starts 3 minutes after the unit restarts. If the
unit was already off before the power failure, the unit
stands by.
46F (8_C) Heating
In the HEATING mode, the temperature can be set to as low as
46
_F (8_C), preventing the indoor area from freezing if
unoccupied during severe cold weather.
ECO Function
S
Used to enter the energy efficient mode.
S Under the COOLING mode, press ECO, the
remote controller adjusts the temperature
automatically to 75
save energy (however only if the set temperature is
less than 75
than 75_F (24_C) and 86_F (30_C), press ECO, the
fan speed will change to AUTO, the set temperature
will remain unchanged.
_F (24_C), AUTO fan speed to
_F (24_C). If the set temperature is more
S When AC receives signals, such as switch off, Turbo
operation, Silence operation, Self clean operation, Forced
COOLING operation, mode setting, Sleeping mode, or
adjusting the set temperature to less than 75
will exit the ECO operation.
_F (24_C), it
S Operation time in ECO mode is 8 hours. After 8 hours
the air conditioner exits this mode.
S If there is a malfunctioning temperature sensor in, the air
conditioner will exit ECO mode.
S The indoor fan runs at auto fan when it enters the ECO
mode. The setting temperature and setting fan speed can
be changed with the remote controller.
Self Clean
S
Press “Self Clean” when the unit is in the COOLING or
DRYING mode, the indoor unit will run at the low fan
speed for 16 minutes then turn off.
S Self Clean keeps the indoor unit dry and prevents mold
growth.
Follow Me
S
If you press “Follow Me” on the remote controller, the
indoor unit will beep. This indicates the “Follow Me”
function is active.
S Once active, the remote controller will send a signal
every 3 minutes, with no beeps. The unit automatically
sets the temperature according to the measurements from
the remote controller.
S The unit will only change modes if the information from
the remote controller makes it necessary, not from the
unit’ s temperature s e t t i n g .
S If the unit does not receive a signal for 7 minutes or you
press “Follow Me,” the function turns off. The unit
regulates temperature based on its own sensor and
settings.
13
Silence
Press SILENCE on the remote controller to enable the SILENCE
function. While this function is active, the indoor unit will run at
faint breeze (1% fan speed), which reduces noise to the lowest
possible level.
Intelligent Eye
With the built−in infrared sensor, the indoor unit detects human
movement. The compressor operates in a low frequency if you
leave the room for 30 minutes. The compressor operates in a lower
frequency if you leave the room for 120 minutes, and resumes
automatically when you come back, which helps save energy.
T able 9—Information Codes
Displayed Code Explanation Additional Notes
T1 T1 T1 temperature
T2 T2 T2 temperature
T3 T3 T3 temperature
T4 T4 T4 temperature
TP TP TP temperature
Targeted Frequency FT Targeted Frequency
Actual Frequency TR Actual Frequency
Compressor Current dL N/A
Outdoor AC Voltage UO N/A
Indoor capacity test Sn N/A
Reserve -- Running mode
Outdoor Fan Speed Pr Outdoor fan speed
EXV opening angle LR EXV opening angle
Indoor fan speed IR Indoor fan speed
Indoor humidity HU N/A
Adjusted setting temperature TT N/A
Indoor dust concentrations DT N/A
WIFI signal strength IF N/A
GA algorithm frequency OT N/A
Information Inquiry
To enter information inquiry status, complete the following
procedure within ten seconds:
S Press LED 3 times.
S Press SWING 3 times.
S If successful, you will hear beeps for two seconds.
S Use LED and SWING to cycle through the information
displayed.
S Press LED to display the next code in the sequence.
Press SWING to display the previous code.
Table 9 displays the information codes. The screen displays the
code for two seconds, then the information for 25 seconds.
14
TROUBLESHOOTING
Safety
!
WARNING
UNIT DAMAGE HAZARD
Electricity remains in capacitors even when the power
supply is off. Ensure the capacitors are fully discharged
before troubleshooting.
Electrolytic Capacitors
(HIGH VOLTAGE! CAUTION!)
Fig. 11 – Electrolytic Capacitors
For other models, please connect discharge resistance (approximately 100
electrolytic capacitor on the contrary side of the outdoor PCB.
Fig. 12 – Discharge Position
NOTE: Fig. 12 is for reference only. Actual appearances may vary.
Ω 40W) or a soldering iron (plug) between the +, − terminals of the
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