Carrier DHMSHAQ09XA1, DHMSHAQ12XA1, DHMSHAQ09XA3, DHMSHAQ18XA3, DHMSHAQ12XA3 Service Manual

DHMSHA
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.....................

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 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.

!

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 DHMSHAQ12XA1

9
12 DHMSHAQ12XA3
18 DHMSHAQ18XA3
24 DHMSHAQ24XA3
30 DHMSHAQ30XA3
36 DHMSHAQ36XA3

DH = FAN COIL UNIT

MS = MODEL

INDOOR FAN COIL TYPE
H = HIGH WALL

DH MS 3Q

115/1/60

208-230/1/60

INDOOR UNIT

AH09

DHMSHAQ09XA1

DHMSHAQ09XA3

X

A

VOLTAGE
1 =115-1-60
3 = 208/230-1-60

VARIATIONS
A = STANDARD

A = MAJOR SERIES

SYSTEM 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

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

2

SPECIFICATIONS

Table 2—Specifications

HEAT PUMP

SIZE 9 12 9 12 18 24 30 36

System

Indoor Model DHMSHAQ09XA1 DHMSHAQ12XA1 DHMSHAQ09XA3 DHMSHAQ12XA3 DHMSHAQ18XA3 DHMSHAQ24XA3 DHMSHAQ30XA3 DHMSHAQ36XA3

Vol tag e,
Phase, Cycle

Electrical

Power Supply Indoor unit powered from outdoor unit

MCA A. 0.4 0.4 0.2 0.2 0.27 0.4 0.4 0.4

Wireless Remote
Controller
(° F/° C Convertible)

Controls

Wired Remote Controller
(° F/° C Convertible)

Cooling
Indoor DB

Operati ng

Min-Max

Range

Heating
Indoor DB
Min-Max

Pipe
Connectio n
Size-Liqui d

Piping

Pipe
Connectio n
Size-Suction

Face Area
(sq. ft. )

Indoor

No. Rows 2 2 2 2 2 3 3 3

Coil

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 i n (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)

Fan Speeds 4 4 4 4 4 4 4 4

Airflow (lowest

Indoor

to highest)

Sound
Pressure
(lowest to
highest)

Air Throw
Data

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

V/Ph/Hz 115-1-60 115-1-60 208/230-1-60 208/230-1-60 208/230-1-60 208/230-1-60 208/230-1-60 208/230-1-60

Standard Standard Standard Standard Standard Standard Standard Standard

Optiona l Optiona l Optiona l Optiona l Optiona l Optiona l Optiona l Optiona l

°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)

°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)

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)

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)

Sq. Ft. 2.2 2.2 2.2 2.2 2.6 3.7 3.7 3.7

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

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

ft (m) 23 (7) 23 (7) 23 (7) 23 (7) 30 (9) 36 (11) 36 (11) 36 (11)

COMPATIBILITY

INDOOR UNIT DHMSHAQ09XA1 DHMSHAQ12XA1 DHMSHAQ09XA3 DHMSHAQ12X A3 DHMSHAQ18XA3 DHMSHAQ24XA3 DHM SHAQ30XA3 DHMS HAQ36XA3

OUTDOOR UNIT

SINGLE ZONE

OUTDOOR UNIT

MULTI-ZONE

38MAQB09R--1 38MAQB12R--1 38MAQB09R--3 38MAQB12R--3 38MAQB18R--3 38MAQB24R--3 38MAQB30R--3 38MAQB36R--3

T able 3—Compatibility

38MGRQ18B--3

38MGRQ24C--3

38MGRQ30D--3

38MGRQ36D--3

38MGRQ48E--3

3

DIMENSIONS

T able 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

5

"

(0.13m)

min.

6" (0.15m) min.

(1.8m)

6'

FLOOR

Fig. 2 – Indoor Unit Clearance

5

"

(0.13m)

min.

4

ELECTRICAL DATA

Table 5—Electrical Data Indoor High Wall

HIGH WALL

UNIT SIZE

9K

12K 0.33 0.053

9K
12K 0.33 0.053
18K 0.49 0.067
24K 0.61 0.16
30K 0.61 0.16
36K 0.61 0.16

*Permissible limits of the voltage range at which the unit will operate satisfactorily.

LEGEND

FLA - Full Load Amps

V-Ph-Hz FLA HP

115-1-60

208/230-1-60

INDOOR FAN

0.33 0.053

0.33 0.053

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.

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/N and (S) between outdoor unit and indoor unit
landing the shield onto ground in the outdoor unit only.

MAX FUSE CB AMP

Refer to outdoor unit installation instructions –

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 or CEC and local
codes.

!

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

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

WIRING DIAGRAMS

CN11



RED

BLUE(BLACK)

YELLOW

S

L

N

Y/G

JX1

INDOOR UNIT

OUTDOOR UNIT

INDOOR WIRING DIAGRAM

,1)$1

M

5

CN4

CN2

L-IN

N

6

CN16

Fig. 5 – Wiring Diagram Sizes 09−12 (115V)

P_1

&1$

&1

8(7)

M



6:,1*02725

CN5

',63/$<%2$5'

&1&1

&1

&1

Wire Contoller

52207(03(5$785(6(1625

3,3(7(03(5$785(6(1625

OPTIONAL

Wi-Fi

Contoller

OPTIONAL

T able 6—INDOOR UNIT CONTROL BOARD

INPUT or OUTPUT VALUE

L_IN Power Voltage: AC115V

CN11 Power Voltage: AC115V

CN16 Relative to the N terminal voltage: DC 24V

CN15 Maximum voltage: DC5V

CN4 Indoor fan interface, maximum voltage: DC310V

CN5 Stepper motor interface, maximum voltage between the lines: DC12V

P_1 Ground

CN8 Room temperature sensor interface, maximum voltage: DC5V

CN9 Pipe temperature sensor interface, maximum voltage: DC5V

CN10A Display interface,maximum voltage between the lines: DC5V

7

WIRING DIAGRAMS (CONT)

CN11



RED

BLUE(BLACK)

YELLOW

S

L1

L2

Y/G

JX1

INDOOR UNIT

OUTDOOR UNIT

INDOOR WIRING DIAGRAM

,1)$1

M

5

CN4

CN2

L-IN

N

6

CN16

Fig. 6 – Wiring Diagram Sizes 09−36 (208−230V)

P_1

&1$

&1

8(7)

M



6:,1*02725

CN5

',63/$<%2$5'

&1

&1

&1

&1



Wire Contoller

52207(03(5$785(6(1625

3,3( 7(03(5$785( 6(1625

OPTIONAL

Wi-Fi

Contoller

OPTIONAL

T able 7—INDOOR UNIT CONTROL BOARD

INPUT or OUTPUT VALUE

L_IN Power Voltage: AC230V

CN11 Power Voltage: AC230V

CN16 Relative to the N terminal voltage: DC24V

CN15 Maximum voltage: DC5V

CN4 Indoor fan interface, maximum voltage: DC310V

CN5 Stepper motor interface, maximum voltage between the lines: DC12V

P_1 Ground

CN8 Room temperature sensor interface, maximum voltage: DC5V

CN9 Pipe temperature sensor interface, maximum voltage: DC5V

CN10A Display interface,maximum voltage between the lines: DC5V

8

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

t

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.

NOTE: All units (except the 18,000 BTU model) have a Master
Suction and Liquid Line Service Valve.

System Vacuum and Charge

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.

Outdoor Unit

Service Valve

CAUTION

Refrigerant

Low Side

A

High Side

B

Fig. 8 – Service Valve

Manifold Gage

Indoor Uni

C

D

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

MICRONS

1500
1000

500

01234567

MINUTES

LEAK IN
SYSTEM

V ACUUM TIGHT
TOO WET

TIGHT
DRY SYSTEM

Fig. 10 – Deep Vacuum Graph

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

BREAK VACUUM WITH DRY NITROGEN

WAIT

EVACUATE

BREAK VACUUM WITH DRY NITROGEN

WAIT

EVACUATE

500 microns

Low side valve

Charge hose

Low side valve

High side valve

Charge hose

Fig. 9 – Manifold

Vacuum pump

CHECK FOR TIGHT, DRY SYSTEM

(IF IT HOLDS DEEP VACUUM)

RELEASE CHARGE INTO SYSTEM

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.

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.

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

speed

H

M

L

T1-Td ć(°F)

Actual fan speed

$+˄ +˅
%
&

'00 0
(
)

*// /
+
,

++ +*

+˄+ +*

00 0=

00 0=

// /'

// /'

Fig. 13 – Indoor Fan Running Rules

The AUTO fan is controlled by the rules shown in Fig. 14.

Fig. 12 – Auto Fan

Fig. 14 – Indoor Fan Running Rules

Evaporator Temperature Protection

When the evaporator temperature is less than the setting value, the
compressor stops.

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

speed

H

M

L

T1-Tdć

Actual fan speed

H-˄H-=H-G)

H˄=H˅

H+(H+=H+G)

M-(M-=M-Z)

M(M=M)

M+(M+=M+Z)

L-(L-=L-D)

L(L=L)

L+(L+=L+D)

Fig. 15 – Indoor Fan Running Rules

Auto Fan Action in HEATING Mode

Evaporator Coil Temperature Protection

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. 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. 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−T s . I f
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 T emperature Protection

In the DRYING mode, if the room temperature is lower than 50
(10

_C), the compressor stops and will not resume until the room

temperature exceeds 53.6

_F (12_C).

_F

12

Evaporator Anti−Freezing Pr otection

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−REST AR T 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 SILENCE 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 LED DISPLAY or LED or MUTE three times, and then
press AIR DIRECTION or SWING three times in ten seconds,
the buzzer rings for two seconds. The air conditioner enters into the
information enquiry status.

Press LED DISPLAY or AIR DIRECTION 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

T able 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).

T able 9—Information Enquiry

ENQUIRY

INFORMATION

T1,T2,T3,T4,

T2B,TP,TH,

Targeted

Frequency,

Actual

Frequency

Indoor fan speed

/Outdoor fan

speed

EXV opening

angle

Compressor

continuous

running time

Compressor stop

causes

Reserve 0-FF

DISPLAY VALUE MEANING REMARK

-1F,-1E,-1d,-1c,

-1b,-1A

-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

0 OFF

1,2,3,4

14-FF

0-FF

0-FF 0-255 minutes

0-99

-25,-24,-23,-22,-21,-20

Low speed, Medium speed,

High speed, Turbo

Actual fan speed = Display

value turns to decimal value

and then multiply 10. The

unit is RPM.

Actual EXV opening value =

Display value turns to

decimal value and then

multiply 2.

For the detailed meaning,

please consult with engineer

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.

For some big capacity motors.

For some small capacity motors, the display value is from

14-FF (hexadecimal), the corresponding fan speed range

is from 200-2550 RPM.

If the actual value exceeds the range, it displays the
maximum value or minimum value.

Decimal display

14

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 100
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.

Ω 40W) or a soldering iron (plug) between the +, − terminals of the

15

INDOOR UNIT DIAGNOSTIC GUIDE

T able 10—Indoor Unit Error Display

OPERATION LAMP TIMER LAMP DISPLAY LED STATUS

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
H 2 times H

H 3 times H

H 5 times H

X E0 Indoor unit EEPROM parameter error

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

P0 IPM malfunction or IGBT over-strong current protection

P1 Over voltage or over low voltage protection

P2

P4 Inverter compressor drive error

High temperature protection of compressor top diagnosis and solution (only for
9k,12k models)

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

Troubleshooting

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.

·Installation mistake

·PCB faulty

Power off, then restart the

unit 2 minutes later.

Yes

Replace the indoor/outdoor

main PCB.

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

Supposed Causes

Troubleshooting

Indoor unit does not receive the feedback from outdoor unit during 110 seconds and this condition
happens four times continuously.

·Wiring mistake

·Indoor or outdoor PCB faulty

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)

Yes

Check the outdoor wiring connection

No

Replace the reactor

Yes

Yes

No

Check whether the
reactor is normal

Yes

Replace the outdoor main PCB.
Power on. Is the error resolved?

No

Replace the indoor main PCB

Check the indoor wiring connection

Yes

Replace the indoor main PCB.
Power on. Is the error resolved?

No

Replace the outdoor main PCB.

18

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.

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.

Fig. 24 – Test the Reactor Resistance

19

DIAGNOSIS AND SOLUTION (CONT)

Zero crossing detection error diagnosis and solution (E2)

Error Code E2

Malfunction decision conditions

Supposed causes

Troubleshooting

When the PCB does not receive a zero crossing signal feedback for 4 minutes or the zero crossing
signal time interval is abnormal.

·Connection mistake

·PCB faulty

Check if the connections and
power supply are normal.

Yes

Indoor main PCB is

defective. Replace indoor

main PCB.

No

Correct the connections. Turn on the
unit when the power supply is good.

20

DIAGNOSIS AND SOLUTION (CONT)

Fan speed has been out of control diagnosis and solution (E3/F5)

Error Code E3/F5

Malfunction decision conditions

Supposed causes

Troubleshooting

When indoor fan speed remains too low (300RPM) for certain time, the unit stops and the LED
displays the failure.

·Wiring mistake

·Fan assembly faulty

·Fan motor faulty

·PCB faulty

Power off, then restart the

unit 2 minutes later

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

No

No

No

The unit operates normally.

Find the cause and resolve it.

Correct the connections.

Replace the main PCBNo

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

T able 11—DC motor voltage input and output (voltage: 220−240V~)

NO. COLOR SIGNAL VOLTAGE

1 Red Vs/Vm 280V~380V

2 --- --- ---

3 Black GND 0V

4 White Vcc 14-17.5V

5 Yellow Vsp 0~5.6V

6 Blue FG 14-17.5V

T able 12—DC motor voltage input and output (voltage : 115V~)

NO. COLOR SIGNAL VOLTAGE

1 Red Vs/Vm 140V~190V

2 --- --- ---

3 Black GND 0V

4 White Vcc 14-17.5V

5 Yellow Vsp 0~5.6V

6 Blue FG 14-17.5V

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

Supposed causes

Troubleshooting

Check the connection

between the temperature

sensor and PCB.

·Sensor faulty

·PCB faulty

Correct the connectionNo

Yes

Measure the resistance

value of the sensor

Yes

Replace indoor or outdoor

main PCB

Replace the sensorNo

Fig. 26 – Check the connection

23

DIAGNOSIS AND SOLUTION (CONT)

Refrigerant Leakage Detection diagnosis and solution (EC)

Error Code EC

Define the evaporator coil temp.T2 of the compressor. It starts running in Tcool.

Malfunction decision conditions

Supposed causes

Troubleshooting

Power off, then restart the

unit 2 minutes later.

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.

·T2 sensor faulty

·Indoor PCB faulty

·System problems, such as leakage or blocking.

Yes

Check cool air blowing out
from indoor air outlet

No

Check for system leaks

No

Check for system blocking and
clear the block

Yes

Yes

Check the T2 sensor

Yes

Replace indoor PCB.

Repair the leakage and

recharge the refrigerant.

24

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.

·Power supply problems

·System blockage

Supposed causes

Troubleshooting

·PCB faulty

·Wiring mistake

·Compressor malfunction

Check the power supply

Yes

Check for system blockage

Yes

Check the compressor

resistance values

Yes

Check the connections and
wires

Yes

Check the reactor

No

Stop the unit

No Clear the blockage

No

No

No

Replace the compressor

Correct the connections or

replace the wires.

Replace outdoor main PCB

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

Supposed causes

Troubleshooting

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.

·Wiring mistake

·IPM malfunction

·Outdoor fan assembly faulty

·Compressor malfunction

·Outdoor PCB faulty

Check the wiring between main the
PCB and the compressor

No

Check the IPM No

Yes

Check the outdoor fan and the

outdoor unit ventilation

Yes

Check the compressor resistance

values

Yes

Yes

No

No

Correct the connection or replace

the wires and connectors.

Replace the IPM board or replace

the main PCB

Please refer to the solution of ǏFan

Speed Has Been Out Of Controlǐ

malfunction

Replace the compressor.

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.

·Power supply problems

Supposed causes

Troubleshooting

·System leakage or block

·PCB faulty

Check the power supply

Yes

Check the connections and
wires

Yes

Check the voltage between P

and N

Yes

Check the reactor

Yes

No

No

No

No

Stop the unit

Correct the connections or

replace the wires.

Replace the IPM board

Replace outdoor main PCB

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.

·Power supply problems

Supposed causes

Troubleshooting

·System leakage or block

·PCB faulty

Check the air flow system

of indoor and outdoor units

No

Power off, then restart the unit 10

minutes later

Yes

Check the temperature

of the compressor

Yes

Check refrigerant system

Yes

Yes

No

Clear up the air inlet and outlet or the heat

exchanger of indoor and outdoor units.

Check the overload

protector

Yes

Measure the resistance

between the two ports of

the OLP. Is it zero?

Yes

Replace the outdoor control PCB.

No

Correct the connection.No

Replace the OLP.

31

DIAGNOSIS AND SOLUTION (CONT)

Inverter compressor drive error diagnosis and solution (P4)

Error Code

Malfunction decision conditions

Supposed causes

Troubleshooting

P4

An abnormal inverter compressor drive is detected by a special detection circuit, including
communication signal detection, voltage detection, compressor rotation speed signal detection, etc..

·Wiring mistake

·IPM malfunction

·Outdoor fan assembly faulty

·Compressor malfunction

·Outdoor PCB faulty

Check the wiring between main PCB
and compressor

No

Check the IPM

Yes

Check the outdoor fan and the

outdoor unit ventilation

Yes

Check the compressor resistance

values

Yes

Yes

No

Correct the connection or replace

the wires and connectors.

Replace the IPM board or replace

the main PCB

Please refer to the solution of ǏFan

No

Speed Has Been Out Of Controlǐ

malfunction

No Replace the compressor.

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 K Ohm ° C ° F K Ohm ° C ° F K Ohm ° C ° F K Ohm

-20 -4 115.266 20 68 12.6431 60 140 2.35774 100 212 0.62973

-19 -2 108.146 21 70 12.0561 61 142 2.27249 101 214 0.61148

-18 0 101.517 22 72 11.5 62 144 2.19073 102 216 0.59386

-17 1 96.3423 23 73 10.9731 63 145 2.11241 103 217 0.57683

-16 3 89.5865 24 75 10.4736 64 147 2.03732 104 219 0.56038

-15 5 84.219 25 77 10 65 149 1.96532 105 221 0.54448

-14 7 79.311 26 79 9.55074 66 151 1.89627 106 223 0.52912

-13 9 74.536 27 81 9.12445 67 153 1.83003 107 225 0.51426

-12 10 70.1698 28 82 8.71983 68 154 1.76647 108 226 0.49989

-11 12 66.0898 29 84 8.33566 69 156 1.70547 109 228 0.486

-10 14 62.2756 30 86 7.97078 70 158 1.64691 110 230 0.47256

-9 16 58.7079 31 88 7.62411 71 160 1.59068 111 232 0.45957

-8 18 56.3694 32 90 7.29464 72 162 1.53668 112 234 0.44699

-7 19 52.2438 33 91 6.98142 73 163 1.48481 113 235 0.43482

-6 21 49.3161 34 93 6.68355 74 165 1.43498 114 237 0.42304

-5 23 46.5725 35 95 6.40021 75 167 1.38703 115 239 0.41164

-4 25 44 36 97 6.13059 76 169 1.34105 116 241 0.4006

-3 27 41.5878 37 99 5.87359 77 171 1.29078 117 243 0.38991

-2 28 39.8239 38 100 5.62961 78 172 1.25423 118 244 0.37956

-1 30 37.1988 39 102 5.39689 79 174 1.2133 119 246 0.36954

0 32 35.2024 40 104 5.17519 80 176 1.17393 120 248 0.35982

1 34 33.3269 41 106 4.96392 81 178 1.13604 121 250 0.35042

2 36 31.5635 42 108 4.76253 82 180 1.09958 122 252 0.3413

3 37 29.9058 43 109 4.5705 83 181 1.06448 123 253 0.33246

4 39 28.3459 44 111 4.38736 84 183 1.03069 124 255 0.3239

5 41 26.8778 45 113 4.21263 85 185 0.99815 125 257 0.31559

6 43 25.4954 46 115 4.04589 86 187 0.96681 126 259 0.30754

7 45 24.1932 47 117 3.88673 87 189 0.93662 127 261 0.29974

8 46 22.5662 48 118 3.73476 88 190 0.90753 128 262 0.29216

9 48 21.8094 49 120 3.58962 89 192 0.8795 129 264 0.28482

10 50 20.7184 50 122 3.45097 90 194 0.85248 130 266 0.2777

11 52 19.6891 51 124 3.31847 91 196 0.82643 131 268 0.27078

12 54 18.7177 52 126 3.19183 92 198 0.80132 132 270 0.26408

13 55 17.8005 53 127 3.07075 93 199 0.77709 133 271 0.25757

14 57 16.9341 54 129 2.95896 94 201 0.75373 134 273 0.25125

15 59 16.1156 55 131 2.84421 95 203 0.73119 135 275 0.24512

16 61 15.3418 56 133 2.73823 96 205 0.70944 136 277 0.23916

17 63 14.6181 57 135 2.63682 97 207 0.68844 137 279 0.23338

18 64 13.918 58 136 2.53973 98 208 0.66818 138 280 0.22776

19 66 13.2631 59 138 2.44677 99 210 0.64862 139 282 0.22231

34

APPENDIX (CONT)

Table 14—Temperature Sensor Resistance Value Table for T1,T2,T3,T4 (_C−−K)

° C ° F K Ohm ° C ° F K Ohm ° C ° F K Ohm ° C ° F K Ohm

-20 -4 542.7 20 68 68.66 60 140 13.59 100 212 3.702

-19 -2 511.9 21 70 65.62 61 142 13.11 101 214 3.595

-18 0 483 22 72 62.73 62 144 12.65 102 216 3.492

-17 1 455.9 23 73 59.98 63 145 12.21 103 217 3.392

-16 3 430.5 24 75 57.37 64 147 11.79 104 219 3.296

-15 5 406.7 25 77 54.89 65 149 11.38 105 221 3.203

-14 7 384.3 26 79 52.53 66 151 10.99 106 223 3.113

-13 9 363.3 27 81 50.28 67 153 10.61 107 225 3.025

-12 10 343.6 28 82 48.14 68 154 10.25 108 226 2.941

-11 12 325.1 29 84 46.11 69 156 9.902 109 228 2.86

-10 14 307.7 30 86 44.17 70 158 9.569 110 230 2.781

-9 16 291.3 31 88 42.33 71 160 9.248 111 232 2.704

-8 18 275.9 32 90 40.57 72 162 8.94 112 234 2.63

-7 19 261.4 33 91 38.89 73 163 8.643 113 235 2.559

-6 21 247.8 34 93 37.3 74 165 8.358 114 237 2.489

-5 23 234.9 35 95 35.78 75 167 8.084 115 239 2.422

-4 25 222.8 36 97 34.32 76 169 7.82 116 241 2.357

-3 27 211.4 37 99 32.94 77 171 7.566 117 243 2.294

-2 28 200.7 38 100 31.62 78 172 7.321 118 244 2.233

-1 30 190.5 39 102 30.36 79 174 7.086 119 246 2.174

0 32 180.9 40 104 29.15 80 176 6.859 120 248 2.117

1 34 171.9 41 106 28 81 178 6.641 121 250 2.061

2 36 163.3 42 108 26.9 82 180 6.43 122 252 2.007

3 37 155.2 43 109 25.86 83 181 6.228 123 253 1.955

4 39 147.6 44 111 24.85 84 183 6.033 124 255 1.905

5 41 140.4 45 113 23.89 85 185 5.844 125 257 1.856

6 43 133.5 46 115 22.89 86 187 5.663 126 259 1.808

7 45 127.1 47 117 22.1 87 189 5.488 127 261 1.762

8 46 121 48 118 21.26 88 190 5.32 128 262 1.717

9 48 115.2 49 120 20.46 89 192 5.157 129 264 1.674

10 50 109.8 50 122 19.69 90 194 5 130 266 1.632

11 52 104.6 51 124 18.96 91 196 4.849

12 54 99.69 52 126 18.26 92 198 4.703

13 55 95.05 53 127 17.58 93 199 4.562

14 57 90.66 54 129 16.94 94 201 4.426

15 59 86.49 55 131 16.32 95 203 4.294

16 61 82.54 56 133 15.73 96 205 4.167

17 63 78.79 57 135 15.16 97 207 4.045

18 64 75.24 58 136 14.62 98 208 3.927

19 66 71.86 59 138 14.09 99 210 3.812

35

APPENDIX (CONT)

Table 15—ΔT(° F)=9ΔT(° C)/5

° C ° F °C ° F ° C ° F ° C ° F ° C ° F

-5 23 21 69.8 51 123.8 82 179.6 113 235.4

-4 24.8 22 71.6 52 125.6 83 181.4 114 237.2

-3 26.6 23 73.4 53 127.4 84 183.2 115 239

-2 28.4 24 75.2 54 129.2 85 185 116 240.8

-1 30.2 25 77 55 131 86 186.8 117 242.6

0 32 25.5 77.9 56 132.8 87 188.6 118 244.4

0.5 32.9 26 78.8 57 134.6 88 190.4 119 246.2

1 33.8 27 80.6 58 136.4 89 192.2 120 248

1.5 34.7 28 82.4 59 138.2 90 194 121 249.8

2 35.6 29 84.2 60 140 91 195.8 122 251.6

2.5 36.5 30 86 61 141.8 92 197.6 123 253.4

3 37.4 31 87.8 62 143.6 93 199.4 124 255.2

3.5 38.3 32 89.6 63 145.4 94 201.2 125 257

4 39.2 33 91.4 64 147.2 95 203 126 258.8

4.5 40.1 34 93.2 65 149 96 204.8 127 260.6

5 41 35 95 66 150.8 97 206.6 128 262.4

6 42.8 36 96.8 67 152.6 98 208.4 129 264.2

7 44.6 37 98.6 68 154.4 99 210.2 130 266

8 46.4 38 100.4 69 156.2 100 212 131 267.8

9 48.2 39 102.2 70 158 101 213.8 132 269.6

10 50 40 104 71 159.8 102 215.6 133 271.4

11 51.8 41 105.8 72 161.6 103 217.4 134 273.2

12 53.6 42 107.6 73 163.4 104 219.2 135 275

13 55.4 43 109.4 74 165.2 105 221 136 276.8

14 57.2 44 111.2 75 167 106 222.8 137 278.6

15 59 45 113 76 168.8 107 224.6 138 280.4

16 60.8 46 114.8 77 170.6 108 226.4 139 282.2

17 62.6 47 116.6 78 172.4 109 228.2 140 284

18 64.4 48 118.4 79 174.2 110 230 141 285.8

19 66.2 49 120.2 80 176 111 231.8 142 287.6

20 68 50 122 81 177.8 112 233.6 143 289.4

36

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.

T able 16—Digital Tester

DIGITAL TESTER

(+)Red (-)Black

N

P

U
V

W

NORMAL RESISTANCE

VALUE

∞

(Several MΩ)

DIGITAL TESTER

(+)Red (-)Black

U

V

W

(+)Red

N

NORMAL RESISTANCE

VALUE

∞

(Several MΩ)

Indoor AC Fan Motor

Measure the resistance value of each winding by using the tester.

Table 17—Resistance Value

POSITION RESISTANCE VALUE

100.5Ω±8%

Black - Red

White - Black

(20°C /68°F)

(Brand: Weiling)

64.5Ω±8%

(20°C /68°F)

(Brand: Weiling)

RPG13B RPG50B (YKFG-50-4-1)

100Ω±8%

(20°C /68°F)

(Brand: Dayang)

68.5Ω±8%

(20°C /68°F)

(Brand: Dayang)

82.2Ω±8%

(20°C /68°F)

(Brand: Weiling)

72.3Ω±8%

(20°C /68°F)

(Brand: Weiling)

85Ω±8%

(20°C /68°F)

(Brand: Dayang)

57.8Ω±8%

(20°C /68°F)

(Brand: Dayang)

37

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

1) Pull the bottom side of
the panel and release
the clips. Then
remove the front
panel.

Overview:

Panel

One screw

fixing the cover

2) Remove the filter and
horizontal louver.

3) Remove the four
screws.

4) Remove the cover

(one screw).

5) Lift the panel frame

and release the
connector of display
assembly.
Then remove the
panel frame assembly.

Clip

Clip

Filter

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.

Swing motor

Grounding screws

Room temp.

sensor

3) Remove the securing
screw and open the
box cover.

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.

Clip for electronic

control box cover

Evaporator coil

temp. sensor

39

Fan motor connector

and swing motor

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 assembly.

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 2017 CAC / BDP D 7310 W. Morris St. D Indianapolis, IN 46231 Edition Date: 11/17

Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

Catalog No: SG-DHMSHA-01

Replaces: NEW

42