Heat Controller A-DVC18SD-1 Service manual

SERVICE MANUAL

DVC/DVH 09/12/18/24

Inverter Single Zone

Ductless Mini-Split

AITONS/MARS 35 Brownridge Road, Unit 6, Halton Hills, ON L7G 0C6 • 1-888-744-2911 • [email protected] • www.aitons.com

DVC/DVH Inverter Mini-Split Heat Controller

TABLE OF CONTENTS

1. Precaution ........................................................................................................................................................................3

1.1 Safety Precaution ......................................................................................................................................................3

1.2 Warning .....................................................................................................................................................................4

2. Part Identification and Functions ...................................................................................................................................5

2.1 Model Numbers of Indoor/Outdoor units ...................................................................................................................5

2.2 Required clearances for Indoor/Outdoor units .......................................................................................................5-6

2.3 Features .................................................................................................................................................................6-7

3. Dimensional Data ............................................................................................................................................................8

3.1 Indoor Unit ................................................................................................................................................................8

3.2 Indoor Unit Mounting Bracket ...................................................................................................................................9

3.3 Outdoor Unit ............................................................................................................................................................10

4. Refrigerant Cycle Diagram ...........................................................................................................................................11

4.1 Cooling Only Models (DVC) ....................................................................................................................................11

4.2 Heat Pump Models (DVH) ......................................................................................................................................12

5. Wiring Diagrams ............................................................................................................................................................13

5.1 Indoor Units ........................................................................................................................................................13-14

5.2 Outdoor Units ..........................................................................................................................................................15

6. Installation Details .........................................................................................................................................................16

6.1 Electrical .................................................................................................................................................................16

6.2 Line Set Connection Sizes ......................................................................................................................................16

6.3 Line Set Lengths and Elevations ............................................................................................................................16

6.4 Field Charging .........................................................................................................................................................16

7. Operating Conditions ....................................................................................................................................................17

8. Electronic Display Functions .......................................................................................................................................18

8.1 Abbreviations ..........................................................................................................................................................18

8.2 Display Functions ....................................................................................................................................................18

8.3 Main Protection .......................................................................................................................................................18

9. Operation Modes and Functions ..................................................................................................................................19

9.1 Fan Only Mode .......................................................................................................................................................19

9.2 Cooling Mode .....................................................................................................................................................19-21

9.3 Heating Mode .....................................................................................................................................................21-23

9.4 Defrost Mode .....................................................................................................................................................23-24

9.5 Evaporator Coil Temp. Protection ...........................................................................................................................24

9.6 Auto-Mode ..........................................................................................................................................................24-25

9.7 Dry Mode ................................................................................................................................................................25

9.8 Forced Operation ....................................................................................................................................................25

9.9 Timer Function ...................................................................................................................................................25-26

9.10 Sleep Mode ...........................................................................................................................................................26

9.11 Auto-Restart Function............................................................................................................................................26

9.12 Automatic Panel Function .....................................................................................................................................26

9.13 47°F (8°C) Heating ................................................................................................................................................26

10. Troubleshooting ..........................................................................................................................................................27

10.1 Indoor Unit Error Codes ........................................................................................................................................27

10.2 Outdoor Unit Errors and Troubleshooting ........................................................................................................28-31

10.3 Diagnosis and Solution ....................................................................................................................................32-48

10.4 Pressure on Service Port ......................................................................................................................................49

WARNING

• Installation MUST conform with local building codes or, in the absence of local codes, with the National Electrical Code

NFPA70/ANSI C1-1993 or current edition and Canadian Electrical Code Part1 CSA C.22.1. Where conflicts exist, the local

and/or national codes shall prevail.

• The information contained in the manual is intended for use by a qualified, licensed service technician familiar with safety

procedures and equipped with the proper tools and test instruments

• Installation or repairs made by unqualified persons will void the warranty and may cause hazards or incorrect operation.

• Failure to carefully read and follow all instructions in this manual can result in equipment malfunction, property damage,

personal injury and/or death.

2

Heat Controller

1. Precaution

1.1 Safety Precaution



To prevent injury to the user or other people and property damage, the following instructions must be followed.



Incorrect operation due to ignoring instruction will cause harm or damage.



Before service the unit, be sure to read this service manual at first.

1.2 Warning



Installation



Do not use a defective or underrated circuit breaker. Use this appliance on a dedicated circuit.

There is risk of fire or electric shock.



For electrical work, contact the dealer, seller, a qualified electrician, or an authorized service center.

Do not disassemble or repair the product, there is risk of fire or electric shock.



Always ground the product.




Install the panel and the cover of control box securely.

There is risk of fire of electric shock.



Always install a dedicated circuit and breaker.

Improper wiring or installation may cause electric shock.



Use the correctly rated breaker of fuse.




Do not install, remove, or reinstall the unit by yourself (customer).

There is risk of fire, electric shock, explosion, or injury.



Be caution when unpacking and installing the product.

Sharp edges could cause injury, be especially careful of the case edges and the fins on the condenser and evaporator.

3

1

DVC/DVH Inverter Mini-Split



Take care to ensure that power cable could not be pulled out or damaged during operation.

There is risk of fire or electric shock..



Do not touch (operation) the product with wet hands..



Do not allow water to run into electrical parts or the unit.

It may cause fire, failure of the product, or electric shock.



Do not store or use flammable gas or combustible materials near the product.

There is risk of fire or failure of product.



Do not use the product in a tightly closed space for a long time.

Oxygen deficiency could occur.



If abnormal noises or smoke comes from product, turn the breaker off or disconnect the power supply cable.

There is risk of electric shock or fire.



Do not open the inlet grill of the product during operation. (Do not touch the electrostatic filter, if the is equipped with one .)

There is risk of physical injury, electric shock, or product failure..



Turn the main power off when cleaning or maintaining the product.

There is risk of electric shock.



When the product will not be used for a long period of time, turn off the circuit breaker.

There is risk of product damage or failure, or unintended operation.



CAUTION



Always check for refrigerant leakage after installation or repair of product.

Low refrigerant levels may cause operational failure.



Install the drain hose to ensure that water is drained away properly.

Improper installation may cause water leakage and damage to personal property.




Keep the unit level even when installing the product.

This helps to avoid vibration or water leakage.



Do not install the product where it will be directly exposed to seaside wind (salty air).

It may cause corrosion on the product.

Corrosion, particularly on the condenser and evaporator fins, could cause product malfunction or inefficient operation.



Operational



Do not block the inlet or outlet of air flow.



Use a soft cloth to clean. Do not use harsh detergents, solvents, etc.

There is risk of fire, electric shock, or damage to the plastic parts of the product.



Do not touch the metal parts of the product when removing the air filter. They are very sharp.



Always insert the filter securely.

Clean the filter every two weeks or more often if necessary.

A dirty filter reduces the efficiency of the air conditioner and could cause product malfunction or damage.



Do not insert hands or other objects through air inlet or outlet while the product is operated.



Replace the all batteries in the remote control with new ones of the same type. Do not mix old and new batteries or different brands of batteries.

There is risk of fire or explosion.



If battery acid from the batteries gets onto your skin or clothes, wash it well with clean water and contact your local poison control center. Do not use the remote of the batteries have leaked.

4

2

Heat Controller

Heat Controller

2. Part Identification and Functions

2.1 Model Numbers of Indoor/Outdoor units

Capacity

9KBTU/H

12KBTU/H

18KBTU/H

24KBTU/H

Indoor Units

B-DVH09SD-0 / B-DVC09SD-0




2.2 Required Clearances for Indoor and Outdoor units


Outdoor Units

A-DVH09SD-0 / A-DVC09SD-0




3

5


2.3 Features

Note: For Reference Only. Your model may differ and is subject to change.

Follow Me(O)

1W Standby

6

4

H Valve Protection Cover

Anti-rust Cabinet

Slump Heater

PTC Heating Belt(O)

Compressor Crankcase Heater(O)

Heat Controller

2.3.1 Description of Features and Functions


•

Auto-Restart:

The unit will memorize the set conditions before a power failure and resume operation automatically when the power re-starts.

•

Sleep Mode:

This feature helps keep the room conditions at the most desirable levels when you sleep.

•

Turbo Mode:

Turbo mode allows the unit to quickly heat or cool and room, at a high speed fan setting.

•

Anti-Cold Blow:

In heating mode, this feature prevents cold air from blowing until warm air is ready to be delivered.

•

Silver Ion Filter:

The silver filter sterilizes bacteria in the air stream by decomposing cell wall of bacteria.

•

Low Ambient Operation:

Allows the unit to operate under low outdoor temperatures.

•

Gold Hydrophilic Condensers Fin Coating:

This coating improves the heating efficiency by accelerating the defrosting process. The anticorrosive gold coating on the condenser helps withstand salty air and corrosive elements for sea side applications.

•

Self Clean:

This function wicks away any moisture, essentially cleaning the inside of indoor unit to prevents bacteria for forming. This feature is especially useful at the end of the season and/or when the unit will not be used for an extended period of time.

•

Follow me:

A temperature sensor is built in the remote control, which signals the unit to automatically change the operation mode to supply a comfortable temperature. Using this feature allows the unit to sense the conditions where you are in the room, rather than up high in the room where it traditionally senses the conditions via the indoor unit.

•

Low Room Temperature Protection:

Allows the unit to maintain a set temperature to protect the area it is installed in from freezing when you will be away for an extended period of time in the winter.

•

Louver Swing and Position Memory:

The louvers can swing to make a breeze like affect in the air flow from the indoor unit. When starting the unit after shutting down, the louver will restore the user’s settings for louver position.

•

Refrigerant Leak Detection:

The refrigerant leakage detect function prevents the unit from freezing due to low charge and protects the compressor from being damaged.

•

Self-Diagnosis Function:

The system monitors itself for abnormal operations and turns of the unit automatically to protect it from further damage, then displays an error code to help troubleshoot the problem for a quick solution.

•

Sump Heater:

A PTC heater is installed in the base pan of the outdoor unit to prevent the rain, snow or defrosted water from accumulating and icing up the unit.

•

Compressor Crankcase Heater:

The oil dissolves easily into the refrigerant, especially in low temperature condition, therefore the crankcase heating belt is used to warm the bottom of the compressor to avoid pumping out too much oil within the refrigerant, which helps to protect the compressor.

7

5


3. Dimensional Data

3.1 Indoor Unit

Note: The drawings below are only for reference. Actual dimensions may be different and are subject to change.

D

H

W

Note: The above drawing is only for reference. The dimensions of your actual unit may be different and are subject to change.

Model W D H

B-DVC09SD-0

B-DVH09SD-0

26.8in

(680mm)

7.0in

(178mm)

B-DVC12SD-0

10.0in

(255mm)

B-DVH12SD-0

30.3in

(770mm)

7.4in

(188mm)

B-DVC18SD-1

B-DVH18SD-1

B-DVC24SD-1

B-DVH24SD-1

35.6in

(905mm)

40.6in

(1030mm)

7.8in

(198mm)

8.6in

(218mm)

10.8in

(275mm)

12.4in

(315mm)

6

8

Heat Controller DVC/DVH Inverter Mini-Split

3.2 Indoor Unit Mounting Bracket


L

R

H

Model R

B-DVC/DVH09 3.6in(92mm)

L

6.7in

(170mm)

B-DVC/DVH12 3.7in(95mm)

B-DVC/DVH18 3.1in(80mm) 3.9in(100mm)

H

1.8in

(45mm)

Hole Diameter

Φ2.56in

(65mm)

L

R

H

Model R L

B-DVC/DVH24 6.4in(163mm) 11.5in(293mm) 1.8in(45mm) Φ2.56in(65mm)

9

7

H Hole Diameter


3.3 Outdoor Unit


Note: The above drawing is only for reference. The dimensions of your actual unit may be different and are subject to change.

Model W H D W1 A B

A-DVC/DVH09

A-DVC/DVH12

26.0in

(660mm)

10.5in

(265mm)

21.25in

(540mm)

28.8in

(732mm)

18in

(458mm)

10.9in

(276mm)

A-DVC/DVH18

30in

(760mm)

A-DVC/DVH24

33.3in

(845mm)

11.25in

(285mm)

12.5in

(320mm)

23.2in

(590mm)

27.6in

(700mm)

32.5in

(823mm)

35.7in

(908mm)

20.9in

(530mm)

22in

(560mm)

11.5in

(290mm)

13.2in

(335mm)

10

8

Heat Controller

4. Refrigerant Cycle Diagram

4.1 Cooling Only Models (DVC):

INDOOR

LIQUID SIDE

HEAT

EXCHANGE

(EVAPORATOR)

OUTDOOR


CAPILIARY TUBE

HEAT

EXCHANGE

(CONDENSER)

GAS SIDE COMPRESSOR

ATTENTION:

Units can be pumped down for service and recharged.

• A servicer can pump down the refrigerant into the outdoor unit for maintenance or replacement of the indoor unit.

• Also the entire system can be evacuated for maintenance or replacement of the outdoor unit.

11

9


4.2 Heat Pump Models (DVH):

INDOOR

HEAT

EXCHANGE

(EVAPORATOR)

LIQUID SIDE

2-WAY VALVE

OUTDOOR

CHECK VALVE

(Heating Model only)

CAPILIARY TUBE

HEAT

EXCHANGE

(CONDENSER)

Heat Controller

GAS SIDE

3-WAY VALVE

ACCUMULATOR

COMPRESSOR

REVERSING VALVE

(Heating Model only)

COOLING

HEATING

ATTENTION:

Units can be pumped down for service and recharged.

• A servicer can pump down the refrigerant into the outdoor unit for maintenance or replacement of the indoor unit.

• Also the entire system can be evacuated for maintenance or replacement of the outdoor unit.

12

10

Heat Controller

5.0 Wiring Diagrams:

5.1 Indoor Units:

B-DVC09SD-0, B-DVH09SC-0, B-DVH12SD-0, B-DVH12SD-0


B-DVC18SD-1, B-DVH18SD-1

13

11


B-DVC24SD-1, B-DVH24SD-1

Heat Controller

14

12

Heat Controller

5.2 Outdoor Units

A-DVC09SD-0, A-DVH09SD-0, A-DVC12SD-0, A-DVH12SD-0


A-DVC18SD-1, A-DVH18SD-1

15

13


6 Installation Details

6.1 Electrical

All electrical wiring must be done according to local codes. Additionally installations in the

USA, must conform to the current National

Electric Code (NEC) and Installations in

Canada must conform to current Canadian

Electric Code (CEC).

Nameplate data indicates the operating voltage, phase, ampacity, maximum over current protection, and minimum voltage.

The contractor is to provide an individual branch circuit for over current protection for the unit as required by code. Some codes may require a disconnect between the indoor and outdoor unit. Run power supply wiring through a weatherproof disconnect box and conduit to the unit connection. Disconnects are required to be within sight and easy reach of the unit

(usually within 3 feet).

Circuit breakers and disconnect switches should be properly sized based on the required codes and the unit’s nameplate requirements.

Check the unit wiring diagram for the number of conductors required. Ensure that the proper

AWG (gauge) and type of wired is used to comply with code and the unit’s nameplate.

Route neatly and protect from sharp edges and damage. Inadequate wiring and/or improper electrical supply will likely result in failure of the compressor and other electrical components and voids the warranty.

6.2 Line Set Connection Sizes

Connection Size

Models

Gas Liquid

Models

DVC/DVH09SD-0

DVC/DVH12SD-0

DVC/DVH18SD-1

DVC/DVH24SD-1

Max.

Elevation

26ft (8m)

33ft (10m)

6.4 Field Charging:

Max.

Length

66ft

(20m)

82ft

(25m)

Heat Controller

DVC09SD-0 / DVH09SD-0




3/8in

(9.52mm)

1/2in

(12.7mm)

5/8in

(15.9mm)

6.3 Line Set Lengths and Elevations

1/4in

(6.35mm)

1/4in

(6.35mm)

3/8in

(9.52mm)


7. Operating Conditions

Indoor (Room)

Temperature

Cool Mode

≥62°F(17°C)

Heat Mode

≤86°F(30°C)

Dry Mode

＞50°F(10°C)

Outdoor (Ambient)

Temperature

5°F - 122°F

(-15°C - 50°C)

5°F - 86°F

(-15°C - 30°C)

32°F - 122°F

(0°C - 50°C)

CAUTION:

1. If the unit is used outside of the above conditions, certain safety protection features may come into operation and cause the unit to operate abnormally.

2. If the room relative humidity is greater than 80%, the surface of the indoor unit may attract condensation. To lessen the chance for condensate dripping, set the vertical air flow louver to its maximum angle (vertically to the floor) and set the fan mode to HIGH.

17

15


8. Electronic Display Functions

8.1 Abbreviations

T1: Indoor room temperature

T2: Coil temperature of evaporator

T3: Coil temperature of condenser

T4: Outdoor ambient temperature

T5: Compressor discharge temperature

Ts: Temperature Set Point

8.2 Display functions

8.2.1 Icon Identification on indoor display board.

Defrost

This indicator illuminates when the air conditioner starts defrosting automatically or when the warm air control feature is activated in heating mode

Run

Flashes when the unit is in standby.

Illuminates a solid light when the unit is on

.

Timer

This indicator illuminates when

TIMER is set ON/OFF.

Signal

Temperature indicator

Displays the temperature settings when the unit is operational, also displays any error codes for diagnosis and troubleshooting.

Receives the signal from the remote control.

Receiver

18

16

Heat Controller

8.3 Main Protection

8.3.1 Compressor Three Minute Time Delay

There is a 1 minute delay the 1 st

time the unit is started-up, then a 3 minute delay each time the unit is started up after the 1 st

time.

8.3.2 Compressor Top Temperature

Protection

The unit will stop working when the top of the compressor temperature is reached, and will restart after the compressor top temperature protector restarts.

8.3.3 Compressor Discharge Temperature

Protection

When the compressor discharge temperature is getting high, the frequency of the compressor will be limited as stated below:

When the compressor discharge temperature

T5>239°F(115°C) for 5s, the compressor will stop. However, when the temperature is between 226.4°F (108°C)<T5<239°F (115°C), the compressor frequency will decrease to the lowest level every 3 minutes. Then when the temperature is 194°F (90°C) <T5<221°F

(105°C), the compressor will keep running at the current frequency. When T5<194°F

(90°C), there will be no limit on the compressor frequency.

8.3.4 Out of Control Fan Speed

When Indoor Fan Speed runs at 300RPM or lower, for a designated period of time, the unit will stop running and the appropriate error code will show on the display.

8.3.5 Inverter Module Protection

The Inverter module has protection features regarding current, voltage and temperature. If these any of these are abnormal, the corresponding error code will display on indoor unit and the unit will stop working.

8.3.6 Indoor fan delayed open function

When the unit starts up, the louver will be active immediately, but the indoor fan will not start for

10s. If the unit is in heating mode, the indoor fan will be also controlled by anti-cold wind function to eliminate cold blow.

Heat Controller

8.3.7 Compressor Crankcase Heater

If the outdoor ambient temperature T4<38°F

(3°C) and the unit connects to a new power supply or if the compressor has stopped for over 3 hours, the crankcase heater will turn on.

When T4>41°F (5°C) or the compressor starts running, the crankcase heater will turn off.

8.3.8 Zero Crossing Detection Error

If the unit detects a time interval is not correct for a continuous 240s, the unit will stop and the

LED will display the appropriate error code. The correct zero crossing signal time interval should be between 6-13ms.

8.4.2.9 Condenser temperature protection

131°F (55°C) <T3<140°F (60°C), the compressor frequency will decrease until it

9.0 Operation Modes and Functions

9.1 Fan Only Mode

In Fan only mode, the outdoor fan and compressor stop running. The temperature setting function is disabled and no setting temperature is displayed on the indoor unit.

The Indoor fan can be set to high/med/low/auto in fan only mode. The louver will operate the same as it does in cooling mode. When the fan only mode is placed in Auto Mode, it operates as shown below:

°F (°C)

DVC/DVH Inverter Mini-Split reaches level F1 and will continue to run at this level. When T3<129°F (54°C), the compressor will keep running at the current frequency.

However, if T3<126°F (52°C), the compressor will not limit the frequency and resume to the former frequency based on demand. But, if

T3>140°F (60°C) for 5 seconds, the compressor will stop until T3<126°F (52°C).

8.4.2.10 Evaporator temperature protection

When T2<32°F(0°C), the compressor will stop and will restart when T2

≥

41°F(5°C). At

32°F(0°C) ≤T2≤39°F(4°C), the compressor frequency will be limited and decreased to the lower level. However when the temperature is

39°F(4°C)≤T2≤45°F(7°C)≤, the compressor will keep the current frequency. At T2>45°F(7°C)≤, the compressor frequency will not be limited.

Fmax=F4

Fmax=F7

Fmax=F8

Fmax=F6

°F (°C)

High

Medium

Low

9.2 Cooling Mode

9.2.1 Compressor Operation-Cooling Mode

The maximum operating frequency (Fmax), follows the chart below based on the outdoor ambient temperature T4

19

17

Fmax=F3


However, if the unit is turned on using the remote control, the compressor will run at the

Fmax frequency for 7 minutes according to the outdoor ambient temperature T4. But after 7 minutes, the operation will take into account the difference (ΔT) in indoor room temperature (T1) and the Set Point Temperature (Ts) and the compressor frequency will operate as follows:

ΔT =T1-Ts

X ΔT°

3.5

A

3.0

B

2.5

C

2.0

D

1.5

E

1.0

F

0.5

-0.5

G

-1.0

H

The zones (A,B,C...H) shown on the chart above correspond to the various compressor running frequencies as a result (ΔT) of the difference between T1-Ts. When the temperature differential (ΔT) of T1-Ts remains in the same zone for 3 minutes, the compressor will run as follows:

In zones A thru E the ΔT is between 3.5 and 1

Degree, the compressor will continue to increase the frequency until it reaches its highest level where Fmax=F8.

In zone F, the compressor continues to run at its current frequency when the temperature differential (ΔT) is between 0.5 and 1 degree.

Once the temperature differential (ΔT) falls below 0.5 degrees, the compressor’s frequency will decrease unit it reaches the lowest level where Fmax=F1.

In zone H, where the ΔT is -1 degree or less, the compressor will run at the lowest frequency where Fmax=F1 for 1hour.

However, when the temperature differential (ΔT) is less than -2 degrees, the compressor will stop.

Additionally, the compressor running frequency is always limited by the current. Therefore, the running currents also must be taken into account. I3COOL, I2COOL, and I1COOL refer to different running current values in the table below.

I

I3COOL

Decrease

I2COOL

I1COOL

Off

Resume

Heat Controller

Hold

Indoor units

I1COOL I2COOL I3COOL

(Amps)

(Amps) (Amps)

B-DVC09SD-0

B-DVH09SD-0

B-DVC12SD-0

B-DVH12SD-0

B-DVC18SD-1

13.0

13.0

13.0

13.0

10.0

14.0

14.0

14.0

14.0

11.0

15.0

15.0

15.0

15.0

13.0

B-DVH18SD-1

B-DVC24SD-1

10.5

12.0

11.5

13.0

13.0

14.0

B-DVH24SD-1 12.0 13.0 14.0

If the running current is too high (above

I3COOL) in the “Off” zone of the chart above, the compressor will stop. Between I3COOL and I2COOL, in the “Decrease” zone the compressor will lower the frequency to the lowest level. The “Hold” zone allows the compressor to continue to run at the current frequency. Note: When the unit is in “hold”

zone for 3 minutes, the compressor frequency will rise to the next highest level. This rise in frequency can occur twice at most while in this

zone. The “Resume” zone places no limitation on the frequency.

Heat Controller

9.2.2 Outdoor Fan Operation - Cooling Mode

The outdoor fan operates based on the Outdoor

Ambient Temperature (T4):

T4

°F (°C)

High

Low

When the outdoor ambient temperature T4 is above 78°F(22°C), the outdoor fan runs high speed, however when the temperature is below this, the fan speed decreases to low and continues to run at low speed when the temperature is 68°F(20°C) or below.

9.4.2.3 Indoor Fan Operation-Cooling Mode

In cooling mode, indoor fan runs all the time and the speed can be set to high, medium, low or auto. When the fan is placed in auto mode, while the unit is in cooling mode, the auto fan operation takes into account the difference (ΔT) in indoor room temperature (T1) and the set point temperature (Ts):

ΔT =T1-Ts

ΔT°

4

High

3

Medium

1.5

1

Low

When there is a 3 to 4 degree difference (ΔT) in set and room temperatures, the fan runs high speed. When the difference in temperature

(ΔT) is between 1 and 3 degrees, the fan speed is medium. However, as the room temperature begins to get closer to the set temp, within 1 degree or less temperature differential (ΔT), the fan speed will run on low.

21

19

15

14

12

11

6

5

34

33

28

27

25

24

22

21

66 (19)

65 (18)


9.3 HEATING MODE

9.3.1 Compressor Operation-Heating Mode

The maximum operating frequency (Fmax), follows the chart below based on the outdoor ambient temperature T4:

T4

°F (°C)

Off

Fmax=F2

Fmax=F3

Fmax=F4

Fmax=F5

Fmax=F6

Fmax=F7

Fmax=F8

Fmax=F9

Fmax=F10


However, if the unit is turned on using the remote control, the compressor will run at the

Fmax frequency for 7 minutes according to the outdoor ambient temperature T4. But after 7 minutes, the operation will take into account the difference (ΔT) in indoor room temperature (T1) and the Set Point Temperature (Ts) and the compressor frequency will operate as follows:

ΔT =T1-Ts

ΔT°

H

H

+5.0

+4.5

+3.5

G

+1.5

+1.0

+0.5

+3.0

+2.5

+2.0

A

B

C

E

D

F

Heat Controller

Additionally, the compressor running frequency is always limited by the current. Therefore, the running currents also must be taken into account. I3HEAT, I2HEAT, and I1HEAT refer to various running current values, see chart.

I

I3HEAT

Decrease

I2HEAT

I1HEAT

Indoor Unit

B-DVC09SD-0

I1HEAT

(Amps)

6.5

Off

Resume

I2HEAT

(Amps)

7.5

Hold

I3HEAT

(Amps)

8.5

The zones (A,B,C...H) shown on the chart above correspond to the various compressor running frequencies as a result (ΔT) of the difference between T1-Ts. When the temperature differential (ΔT) of T1-Ts remains in the same zone for 3 minutes, the compressor will run as follows:

When the ΔT is between 0.5 and 2.5 Degrees, in zones A thru E, the compressor frequency will increase until it reaches the highest level

Fmax=F10.

In zone F, where the ΔT is 3 Degrees, the compressor will continue to run at the current frequency.

Once the ΔT is between 3.5 and 5 degrees in zone G, the compressor will decrease the frequency to its lowest level where Fmax=F1.

When ΔT is above 5 Degrees in the H zone, the compressor will continue to run at Fmax=F1 for

1hour.

When ΔT is greater and 6 degrees, the compressor will stop.

B-DVH09SD-0

B-DVC12SD-0

B-DVH12SD-0

B-DVC18SD-1

B-DVH18SD-1

B-DVC24SD-1

14.0

6.0

14.0

9.0

10.5

11.0

15.0

7.0

15.0

10.0

11.5

12.0

16.0

8.0

16.0

11.0

13.0

13.0

B-DVH24SD-1 12.0 13.0 14.0

22

20

If the running current is too high (above I3HEAT) in the “Off” zone of the chart above, the compressor will stop. Between I3HEAT and

I2HEAT, in the Decrease zone, the compressor will lower the frequency to the lowest level.

The “Hold” zone allows the compressor to continue to run at the current frequency. Note:

When the unit is in “hold” zone for 3 minutes, the compressor frequency will rise to the next highest level. This rise in frequency can occur

twice at most while in this zone. The “Resume” zone places no limitation on the frequency.


9.3.2 Outdoor Fan Operation-Heating Mode

The outdoor fan operates based on the Outdoor

Ambient Temperature (T4):

T4

°F (°C)

15

59 (15)

Low

High

When the outdoor ambient temperature T4 is above 63°F(17°C), the outdoor fan runs low speed, however when the temperature is below this, the fan speed increases to high and continues to run at high speed when the temperature is 63°F(17°C) or below.

9.3.3 Indoor Fan Operation-Heating Mode

The indoor fan runs based on the evaporator coil temperature (T2) as follows: forced to run for 127seconds in breeze mode. During this period, the anti-cold-wind is disabled.

• If the unit runs in forced operation mode, the indoor fan will run with rating speed and the anti-cold-wind function is disabled.

9.3.3.1 Auto Fan Operation-Heating Mode

When the fan is placed in auto mode, while the unit is in cooling mode, the auto fan operation takes into account the difference (ΔT) in indoor room temperature (T1) and the set point temperature (Ts):

ΔT =T1-Ts

ΔT°

Low

2.5

2

Medium

1.5

1

High

TEL8

Setting

TEL7

TEL6

TEL5

TEL4

Medium

Low

TEL3

TEL2

TEL1

TEL0

Off

Breeze

Super

Breeze

TEL0 TEL1 TEL2 TEL3 TEL4 TEL5 TEL6 TEL7 TEL8

75°F 83°F 90°F 95°F 97°F 102°F 111°F

(24°C) (28°C) (32°C) (35°C) (36°C) (39°C) (44°C)

Notes:

• If the compressor stops due to the room temperature rising, the indoor fan will be

21

23

The indoor fan will run at low speed when the

ΔT is greater than 2.5Degrees, medium speed when the ΔT is between 2.5 and 1.5 degrees, and high speed between 1.5 and 1 degrees or less.

9.4 Defrost Mode

9.4.1 Defrosting Conditions:

When T4>32°F(0°C), if the following two items are satisfied, the units start defrosting:

1. T3<38°F(3°C) for 40 minutes and T3 remains lower than 21°F(-6°C) for more than 3 minutes.

2. T3<38°F(3°C) for 80 minutes and T3 remains lower than 25°F(-4°C) for more than 3 minutes.

When T4<32°F(0°C), both the first and second conditions are satisfied, then the program will determine if T2 has decreased more than

41°F(5°C) or not. When T2 has decreased more than 41°F(5°C), the unit enter the defrost mode.


However, no matter what value T4 is, if the unit runs with T3<38°F(3°C) for more than 120 minutes and T3 remains lower than 29°F(-2°C) for more than 3 minutes, the unit will enter defrosting mode whether or not T2 drops more than 41°F(5°C) or not.

9.4.2 Ending Defrosting Operation:

If any one of the following items is satisfied, the defrost operation will end and the unit will return to normal heating mode.

• T3 rises to be higher than TCDE1.

• T3 remains higher than TCDE2 for 80 seconds.

• The unit has run in defrosting mode for

10 minutes.

Indoor units TCDE1 TCDE2

B-DVC/DVH 09, 12 54°F(12°C)

B-DVC/DVH 18, 24 59°F(15°C)

9.4.3 Defrosting Process：

DVC/DVH 9K,12K:

47°F(8°C)

Frequency F2 FrequencyF8

Compressor

4-way valve

Outdoor fan

Indoor fan on off on off on off on off

Indoor fan breeze(10s)

10s xx

10s no longer than 10m 30s

Where xx= 60seconds.

DVC/DVH 18K, 24K:

Frequency F2 Frequency F8

Compressor

4-way valve

Outdoor fan

Indoor fan on off on off on off on off

Indoor fan breeze(10s)

10s xx

10s no longer than 10m 30s

Where xx=60seconds for 18K model

Where xx=90seconds for 24K model

9.5 Evaporator Coil Temp. Protection

When T2>140°F(60°C), the compressor will turn off, but will restart when T2<119°F(48°C).

When T2>128°F(53°C), the compressor frequency will decrease to a lower level and runs at this level for 20seconds to protect the unit. When the frequency decreases to

Fmax= F2 and T2>128°F(53°C) for 3 minutes, the compressor will turn off. However, when the coil temperature lowers to T2<119°F(48°C) or

T2 remains at 119°F(48°C) for 6 minutes, the frequency will not be limited by the evaporator coil temperature (T2).

9.6 Auto-Mode

This mode can be selected using the remote control. The set temperature (Ts) can be changed between 63-86°F (17-30°C).

In auto mode, the machine will choose the mode according to ΔT, where ΔT =T1-Ts:

ΔT=T1-Ts Auto Mode Function:

ΔT>1°

-1°<ΔT≤1°

ΔT≤-1°

Cooling

Fan-only

Heating

Heat Controller

Heat Controller

Indoor fan will run in auto fan mode and the louver will operate based on the mode selected automatically (Heat, Cool, Fan-Only).

Notes:

• If the unit switches between heating and cooling modes automatically, the compressor will stop for 15 minutes and re-select the mode according to the ΔT conditions.

• If the setting temperature is modified, the machine will choose running function again based on ΔT.

9.7 Dry mode

9.7.1 Dry Model Fan Speed and Louver

Function

Indoor fan speed is fixed at breeze speed and can’t be changed. The louver angle will operate the same as it does in cooling mode.

9.7.2 Compressor Operation in Dry Mode

ΔT =T1-Ts

ΔT°

2.5

F3

2.0

1.5

1.0

F2

0.5

0.0

F1

F1

In Dry mode, the compressor’s frequency will decrease from F3 to F1, as the temperature difference (ΔT) between indoor room temperature (T1) and the Set point temperature

(Ts) decreases from 2.5 to 0 Degrees.

9.7.3 Low Room Temperature Protection

In dry mode, if room temperature is lower than

50°F(10°C), the compressor will stop and will not resume operation until room temperature exceeds 54°F(12°C).

9.7.4 Additional Protections in this Mode:

Evaporator anti-freezing, condenser high temperature protection and Compressor

DVC/DVH Inverter Mini-Split frequency and Outdoor fan are all limited in the same method that they would be in the cooling mode.

9.8 Forced Operation

Note: See Forced Operation information in the

Installation instructions.

When the unit is off, pressing the AUTO/COOL button on the indoor unit, under the main cover panel, will force the unit into auto mode. If the

AUTO/COOL button is pressed again within 5 seconds of the first time it was pushed, the machine will go into forced cooling mode.

Pressing the AUTO/COOL button again, any time after 5 seconds of the first time it was pushed, will turn off the unit. In forced operation mode, all general protections and remote control are available.

9.8.1 Operation rules:

Forced cooling mode:

The compressor will run at Fmax=F2 frequency and indoor fan runs in breeze mode. After running for 30 minutes this way, the unit will then run in auto mode with 75°F(24°C) set temperature (Ts). Note: See Auto-Mode

section of this manual for more information.

9.9 Timer function

9.9.1 Timer Range

The timer range is 24 hours and is relevant time, which means it is the time that has elapsed from the time the timer is set.

9.9.2 Timer On

The unit will turn on automatically when the

Timer On set time is reached.

9.9.3 Timer Off

The unit will turn off automatically when the timer off set time is reached.

9.9.4 Timer On/Off

The unit will turn on automatically when the

Timer On set time is reached and then the unit will automatically turn off when the timer off set time is reached.

9.9.5 Timer Off/On

The unit will turn off automatically when the timer off set time is reached and then

DVC/DVH Inverter Mini-Split automatically turn on when the Timer On set time is reached.

9.9.6 Mode within Timer Funtion

The timer function will not change the current operation mode.

9.10 Sleep Mode

9.10.1 Sleep Mode Duration

Sleep mode operates for 7 hours when it is activated. After 7 hours, the unit turns off.

9.10.2 Sleep Mode Operation

When sleep mode is activated while the unit is in cooling mode, the set temperature rises 1° every hour for 2 hours. After 2 hours, the set temperature stops rising and indoor fan is fixed at low speed.

When sleep mode is activated while the unit is in heating mode, the set temperature decreases 1°every hour for 2 hours. After 2 hours, the set temperature stops rising and indoor fan is fixed at low speed (Anti-cold wind function will still have the priority).

9.10.3 Timer Function in Sleep Mode

The Timer function is still available during sleep mode. When the timer off is set for less than 7 hours while in sleep mode, the sleep mode will stop once the set time off is reached.

However, if the timer off is set for more than 7 hours, the unit will not stop operating until reaches the set time in sleep mode.

9.11 Auto-Restart Function

In case of a sudden power failure, the unit will memorize the set conditions before the power failure. When the power returns, the unit will resume its previous operation settings (except for the swing function) automatically after 3 minutes.

9.12 Automatic panel function

The panel will automatically move to the closing direction at an angle of 50° when the unit is receiving power, and this action is not affected by any signal from remote control.

9.12.1 Panel Operation when Powering On

24

26

Heat Controller

When the unit is turned on, the panel is opened automatically at an angle of 50° and then the horizontal louver will open.

9.12.2 Panel Operation when Powering Off

When the unit is turned off, the panel is closed automatically at an angle of 50° and then the horizontal louver will close.

9.12.3 Panel Interference

If the panel is being closed when the horizontal louver is still moving, the unit will stop the horizontal louver from moving and allow the panel to move first. After this, the horizontal louver will continue its pervious movement.

9.13 47°F(8°C) Heating

Note: This is an optional feature and may not be present on your actual model.

In heating operation, the set temperature of the unit can be set as low as 47°F(8°C) in order to keep the room temperature above freezing when the house is unoccupied for an extended period of time in severe cold weather.


10. Troubleshooting

10.1 Indoor Unit Error Codes

KEY: ☆ = Flashing Light X = Light is Off O= Solid Light is On

Operation Timer Display Error:

☆ 1 time

☆

2 times

☆

3 times

X

X

X

E0

E1

E2

Indoor unit EEPROM parameter error

Communication Error between indoor and outdoor unit

Zero-crossing signal detection error

☆

4 times X E3

☆

5 times

☆

6 times

☆

7 times

X

X

X

E4

E5

EC

Indoor fan speed is out of control

T1 Indoor room temperature sensor has an open or short circuit

T2 Evaporator coil temperature sensor has an open or short circuit

Refrigerant leakage detection error

☆

2 times

☆

3 times

☆

4 times

O

O

O

F1

F2

F3

T4 Outdoor temperature sensor has an open or short circuit

T3 Condenser coil temperature sensor has an open or short circuit

T5 Compressor discharge temperature sensor has an open or short circuit

☆

5 times O F4

☆

1 times

☆

2 times

☆

3 times

☆

5 times

☆

☆

☆

☆

P0

P1

P2

P4

Outdoor unit EEPROM parameter error

IPM malfunction or IGBT over-strong current protection error

Over voltage or over low voltage protection error

High temperature protection of compressor top

Inverter compressor drive error

27

25


10.2 Outdoor Unit Errors and Trouble shooting

WARNING: Risk of Electrical Shock

Discharge the power in the capacitors on the board (if it contains electrolytic capacitors):

Heat Controller

Electrolytic Capacitors

(HIGH VOLTAGE! CAUTION!)

Note: All images are for reference only, they may vary from your particular model.

A-DVC09SD-0, A-DVH09SD-0, A-DVC12SD-0, and A-DVH12SD-0

LED1 is Blue. Slow flash = Standby Mode. Fast flash = Error.

26

28

Heat Controller

A-DVC24SD-1, A-DVH24SD-1


LED1 is Blue. Slow flash = Standby Mode. Fast flash = Error.

29

27


DVC18SD-1 and DVH18SD-1

Heat Controller

This board contains four LED lights, shown above. (This image is for reference only).

•

LED1 is Red and signals PCB Power by a solid light when the unit is operating or in standby mode.

•

LED2 is Yellow, which will flash slowly when the unit is in standby mode and remain solid when the unit is in operation. If this light flashes fast, there is an error.

•

LED3 is Red and LED4 is Green. These LEDs are both controlled by the compressor drive chip. See the following chart for more information on how these lights correspond with the

indoor unit error codes.

30

28


DVC18SD-1 and DVH18SD-1 LED3 and LED4 Error Codes:

8

6

7

4

5

2

3

KEY: ☆ = Flashing Light X = Light is Off O= Solid Light is On

No. Error

LED4

(Green)

1 Standby (Normal Operation) O

Operating Normally

IPM malfunction or IGBT over-strong current protection

X

☆

Over voltage or too low voltage protection

Over voltage or too low voltage protection




O

O

X

☆

☆

O

☆

☆

O

LED3

(Red)

X

O

X

☆

Indoor Unit

Display

N/A

N/A

P0

P1

P1

P4

P4

P4

31

29


10.3 Diagnosis and Solution

10.3.1 EEPROM Parameter Error Diagnosis and Solution (E0/F4)

Error Code

E0/F4

Malfunction

Possible Causes

Trouble shooting:

Shut off the power supply and turn it on 5 seconds later. Is it still displaying the error code?

Main PCB chip is not receiving feedback from EEPROM chip

(Indoor/Outdoor)

●

●

Installation error

Faulty PCB

No No further action.

Heat Controller

Yes

If the EEPROM chip is welded on main

PCB, replace the main PCB directly.

Otherwise, check whether the

EEPROM chip plugged in main PCB well?

Yes

No Correct the connection.

Replace the main PCB.

EEPROM: Has a read-only memory, whose contents can be erased and reprogrammed using a pulsed voltage. For the location of EEPROM chip, please refer to the representative photos below.

Indoor PCB

32

30

Outdoor PCB


10.3.2 Indoor / Outdoor Unit Communication Error Diagnosis and Solution (E1)

Error Code

E1

Malfunction

Possible Causes

Indoor unit does not receive the feedback from outdoor unit during

110 seconds and this condition happens four times continuously.

●

●

Wiring error

Faulty Indoor/Outdoor PCB


Power off, then turn on the unit 5 seconds later(reconnect the power wire).Is the error still displaying after several minutes?

No No further action.

Yes

Measure Vs, is it moving alternately

(Vs is the voltage between L2 and S of outdoor unit. Connect the red pin of multimeter with L2 port, black pin with

S port)

No

Yes

Check all the wiring with outdoor u n i t s . Is the wiring to the outdoor main PCB connected correctly? Is the reactor connected well?

Yes

Measure the resistance of the reactor(The one without capacitor).

If it is zero ,follow the below step. If not, replace a new reactor.

Check all the wiring with indoor units.

Is the wiring to the indoor main PCB connected correctly?

Replace the outdoor main PCB.

Yes

Replace the indoor main PCB.

Replace the indoor main PCB.

Replace the outdoor main PCB.

* Note: See next page for masuring Vs and the resistance of the reactor.

33

31


Remark:

Use a multimeter to test the DC voltage between the L2 and S terminals of the outdoor unit.

The red pin of the multimeter should connect to L2 terminal while the black pin is for the S terminal.

When the unit running normally, the voltage will alternate between -50V to

50V.

If the outdoor unit has a malfunction, the voltage will alternate with positive voltage values.

If the indoor unit has malfunction, the voltage will be a constant value.

Remark:

Use a multimeter to test the resistance of the reactor (which does not connect with the capacitor).

The normal value should be around zero ohms. Otherwise, the reactor has malfunctioned and needs to be replaced.

32

34


10.3.3 Zero Crossing Detection Error Diagnosis and Solution (E2)

Error Code

E2

Malfunction

Possible Causes

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

●

●

Connection Error

Faulty PCB


Check if the connections and power supply is normal?

No

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

Yes

Indoor main PCB is defective. Replace indoor main PCB.

35

33


10.3.4 Fan Speed is Out of Control Diagnosis and Solution (E3)

Error Code

E3

Malfunction decision conditions

Possible Causes



When indoor fan speed runs at 300RPM or lower for certain period of time, the unit will stop and the LED will display the failure.

●

●

●

●

Wiring error

Faulty Fan Assembly

Faulty Fan Motor

Faulty PCB

No The unit operates normally.

Yes

Shut off the power supply, rotate the fan by hand.

Does it rotate properly?

No

Find out the cause and have it solved. For example, check whether the fan is

Yes

Check the wires of fan motor. Are all the connections good?

Yes

Check whether the fan motor is normal through index 1?

No

No Correct the connections.

Replace the fan motor

If the malfunction is exists, replace

No

Yes

Check whether the main PCB is normal through index 2?

No

Replace the main PCB.

The malfunction is solved?

Yes

Note: See next page for information pertaining to Index 1 and 2.

36

34

Heat Controller

Heat Controller

10.3.4 Index 1: Indoor AC Fan Motor

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


Position

Black -

Red

White -

Black

RPG13B

530Ω±8%

(20℃/68℉)

(Brand:

Weiling)

315Ω±8%

(20℃/68℉)

(Brand:

Weiling)

RPG15A

75Ω±8%

(20℃/68℉)

(Brand:

Weiling)

150Ω±8%

(20℃/68℉)

(Brand:

Weiling)

Resistance Value

RPG20B RPG28H

381Ω±8%

(20℃/68℉)

(Brand:

Weiling)

267Ω±8%

(20℃/68℉)

(Brand:

Weiling)

183.6Ω±8%

(20℃/68℉)

(Brand:

Weiling)

206Ω±8%

(20℃/68℉)

(Brand:

Weiling)

RPG45B

112Ω±8%

(20℃/68℉)

(Brand:

Weiling)

82Ω±8%

(20℃/68℉)

(Brand:

Weiling)

118.5Ω±8%

(20℃/68℉)

(Brand:

Dayang)

78.5Ω±8%

(20℃/68℉)

(Brand:

Dayang)

10.3.4 Index 2: Indoor AC Fan Motor

Power on and set the fan speed to high. After running for 15 seconds, measure the voltage of pin1 and pin2. If the value of the voltage is less than 100V (208~240V power supply) or 50V (115V power supply), the PCB is defective and needs to be replaced.

37

35


10.3.5 Open or Short Circuit of Temperature Sensor Diagnosis and Solution (E5)

Error Code

Malfunction

Possible Causes

E5

If the sampling voltage is lower than 0.06V or higher than 4.94V, the LED will display the this error code.

●

●

Wiring Error

Faulty Sensor


Check the connections between temperature sensor and main PCB.

Are the connections good?

No Correct the connections.

Yes

Heat Controller

Check the resistance value of the sensor via table1(p64)and table

2(p65), is it normal?

No

Replace the sensor and check if the problem happen again?

Yes

Replace indoor or outdoor main PCB.

Disconnect the temperature sensor from PCB, measure the resistance value of each winding by using the multi-meter.

36

38

Temperature Sensors:

T1: Room Temperature Sensor

T2: Indoor Coil Temperature Sensor

T3: Outdoor Coil Temperature Sensor

T4: Outdoor Ambient Temperature Sensor

T5: Compressor Discharge Temperature Sensor

Heat Controller

℃

-1

0

1

-5

-4

-3

-2

-11

-10

-9

-8

-7

-6

-20

-19

-18

-17

-16

-15

-14

-13

-12

12

13

14

8

9

10

11

15

16

17

18

19

4

5

2

3

6

7

℉

30

32

34

23

25

27

28

12

14

16

18

19

21

5

7

1

3

9

10

-4

-2

0

54

55

57

46

48

50

52

59

61

63

64

66

36

37

39

41

43

45

T1, T2, T3,T4 Temperature Sensor Resistance Value Table

K Ohm

115.266

108.146

101.517

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

96.3423

89.5865

84.219

79.311

74.536

70.1698

66.0898

62.2756

58.7079

56.3694

52.2438

49.3161

22.5662

21.8094

20.7184

19.6891

18.7177

17.8005

16.9341

16.1156

15.3418

14.6181

13.918

13.2631

K Ohm

12.6431

12.0561

11.5

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

10.9731

10.4736

10

9.55074

9.12445

8.71983

8.33566

7.97078

7.62411

7.29464

6.98142

6.68355

3.73476

3.58962

3.45097

3.31847

3.19183

3.07075

2.95896

2.84421

2.73823

2.63682

2.53973

2.44677

℃

39

40

41

35

36

37

38

29

30

31

32

33

34

23

24

25

26

27

28

20

21

22

52

53

54

48

49

50

51

55

56

57

58

59

42

43

44

45

46

47

K Ohm

2.35774

2.27249

2.19073

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

2.11241

2.03732

1.96532

1.89627

1.83003

1.76647

1.70547

1.64691

1.59068

1.53668

1.48481

1.43498

0.90753

0.8795

0.85248

0.82643

0.80132

0.77709

0.75373

0.73119

0.70944

0.68844

0.66818

0.64862

℉

95

97

99

100

102

104

106

84

86

88

90

91

93

73

75

77

79

81

82

68

70

72

118

120

122

124

126

127

129

131

133

135

136

138

108

109

111

113

115

117

℃

79

80

81

75

76

77

78

69

70

71

72

73

74

63

64

65

66

67

68

60

61

62

92

93

94

88

89

90

91

95

96

97

98

99

82

83

84

85

86

87

℉

167

169

171

172

174

176

178

156

158

160

162

163

165

140

142

144

145

147

149

151

153

154

190

192

194

196

198

199

201

203

205

207

208

210

180

181

183

185

187

189

37

39

℃

115

116

117

118

119

120

121

109

110

111

112

113

114

100

101

102

103

104

105

106

107

108

128

129

130

131

132

133

134

135

136

137

138

139

122

123

124

125

126

127


K Ohm

0.62973

0.61148

0.59386

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

0.57683

0.56038

0.54448

0.52912

0.51426

0.49989

0.486

0.47256

0.45957

0.44699

0.43482

0.42304

0.29216

0.28482

0.2777

0.27078

0.26408

0.25757

0.25125

0.24512

0.23916

0.23338

0.22776

0.22231

℉

239

241

243

244

246

248

250

228

230

232

234

235

237

212

214

216

217

219

221

223

225

226

262

264

266

268

270

271

273

275

277

279

280

282

252

253

255

257

259

261

℉

45

46

48

50

52

54

37

39

41

43

25

27

28

30

18

19

21

23

32

34

36

55

57

59

61

63

64

66

1

3

5

7

-4

-2

0

9

10

12

14

16

℃

7

8

9

10

11

12

5

6

3

4

-4

-3

-2

-1

0

1

2

-8

-7

-6

-5

13

14

15

16

17

18

-20

-19

-18

-17

-16

-15

-14

-13

-12

-11

-10

-9

19


T5 Temperature Sensor Resistance Value Table

K Ohm

℃

542.7 20

95.05

90.66

86.49

82.54

78.79

75.24

71.86

155.2

147.6

140.4

133.5

127.1

121

115.2

109.8

104.6

99.69

275.9

261.4

247.8

234.9

222.8

211.4

200.7

190.5

180.9

171.9

163.3

511.9

483

455.9

430.5

406.7

384.3

363.3

343.6

325.1

307.7

291.3

57

58

59

53

54

55

56

47

48

49

50

51

52

43

44

45

46

36

37

38

39

40

41

42

32

33

34

35

25

26

27

28

29

30

31

21

22

23

24

109 25.86

111 24.85

113 23.89

115 22.89

117 22.1

118 21.26

120 20.46

122 19.69

124 18.96

126 18.26

127 17.58

129 16.94

131 16.32

133 15.73

135 15.16

136 14.62

138 14.09

℉

68

70

72

73

75

77

79

81

82

84

86

88

K Ohm

℃

68.66

90

91

93

95

40.57

38.89

37.3

35.78

97

99

34.32

32.94

100 31.62

102 30.36

104 29.15

106 28

108 26.9

65.62

62.73

59.98

57.37

54.89

52.53

50.28

48.14

46.11

44.17

42.33

60

65

66

67

68

69

70

71

61

62

63

64

76

77

78

79

80

81

82

72

73

74

75

97

98

40

99

93

94

95

96

87

88

89

90

91

92

83

84

85

86

38

Heat Controller

℉

K Ohm

212 3.702

253 1.955

255 1.905

257 1.856

259 1.808

261 1.762

262 1.717

264 1.674

266 1.632

214 3.595

216 3.492

217 3.392

219 3.296

221 3.203

223 3.113

225 3.025

226 2.941

228 2.86

230 2.781

232 2.704

234 2.63

235 2.559

237 2.489

239 2.422

241 2.357

243 2.294

244 2.233

246 2.174

248 2.117

250 2.061

252 2.007

℉

K Ohm

℃

140 13.59 100

181 6.228

183 6.033

185 5.844

187 5.663

189 5.488

190 5.32

192 5.157

194 5

196 4.849

198 4.703

199 4.562

201 4.426

203 4.294

205 4.167

207 4.045

208 3.927

210 3.812

142 13.11

144 12.65

145 12.21

147 11.79

149 11.38

151 10.99

153 10.61

154 10.25

156 9.902

158 9.569

160 9.248

162 8.94

163 8.643

165 8.358

167 8.084

169 7.82

171 7.566

172 7.321

174 7.086

176 6.859

178 6.641

180 6.43

127

128

129

130

123

124

125

126

116

117

118

119

112

113

114

115

120

121

122

105

106

107

108

101

102

103

104

109

110

111


10.3.6 Refrigerant Leakage Detection Diagnosis and Solution (EC)

Error Code

Malfunction

Possible Causes

EC

In the first 5 minutes that the compressor starts up, if the temperatures

do not remain a constant function where T2 < (Tcool – 2) for 4 seconds

and occurs 3 times, the display will show error code “EC” and unit will turn off.

T2 is the Indoor Coil Temperature Sensor

Tcool is the temp when the compressor first begins to run.

●

●

●

T2 Sensor faulty

Indoor PCB Faulty

Refrigeration Circuit problems, such as gas leakage or blockages.



Yes

Is there cool air blowing out from indoor air outlet?

No

Is there any leakage? Especially the connection parts, such as the gas valve and the liquid valve.

Yes

Check if T2 sensor is well fixed. Correct the installation or replace T2 sensor. Does the problem remain again?

Yes

Replace indoor PCB.

No

Yes

Repair the leakage and recharge the refrigerant.

Is there any block i n g ? (Such as the capillary or the welded points of the pipes.)

Yes

41

39


10.3.7 IPM Malfunction or IGBT Over Current Protection Diagnosis and Solution (P0)

Error Code


Possible Causes

P0

When the voltage signal that IPM sends to compressor drive chip is abnormal, the display LED will show “P0” and unit will turn off.

●

Wiring error

●

IPM malfunction

●

●

●

Outdoor Fan Assembly faulty

Compressor Malfunction

Outdoor PCB Faulty


Check if the wiring between main

PCB and compressor connected by error and if the wires and connectors are broken?

Yes

Correct the connection or replace the wires and connectors.

No

IPM continuity check. Check if the

IPM terminal resistance values are uniform. Refer to page 64.

No

Replace the IPM board or replace the main PCB if the IPM board and main

PCB are integrated together.

Yes

Check if the outdoor fan runs properly or the outdoor unit ventilation is good.

Yes

Check if the compressor resistance values are uniform .Refer to page 63.

Yes

Replace the outdoor main PCB if the main PCB and IPM are separate.

No

No please refer to the below remark, check whether the resistance of the fan motor is normal. If not, replace the fan motor.

Replace the compressor.

42

40


10.3.7 Index: IPM continuity check

Turn off the power, let the electrolytic capacitors discharge completely, and dismount the IPM.

Use a digital tester to measure the resistance between P and U,V,W,N; U,V,W and N.

(+)Red

Digital tester

(-)Black

N

U

P

V

W

Normal resistance value

∞

(Several MΩ)

Digital tester

(+)Red (-)Black

U

V

N

W

(+)Red

Normal resistance value

∞

(Several MΩ)

Note:

1) DVC09SD-0, DVH09SD-0, DVC12SD-0, DVH12SD-0 models:

Measure the black pin and red pin of the motor connector, the resistance should be around 50Ω at 20℃(68℉)

2) DVC18SD-1 and DVH24SD-1 models:

Measure the

black pin and red pin of the motor connector, the resistance should be around 84.5Ω at 20℃(68℉)

3) DVC24SD-1 and DVH24SD-1 models:

Measure the black pin and red pin of the motor connector, the resistance should be around 88.5Ω at 20℃(68℉)

P-U

43

41


P-V

P-W

44

42


P-N

45

43


10.3.8 High Temperature Protection of Compressor Top Diagnosis and Solution (P2)

Error Code

P2

Malfunction

Possible Causes


Check if the air flow of the indoor and outdoor units are are obstructed?

If the sampling voltage is not 5V, the LED will display the error.

●

●

●

Power Supply Problems.

Refrigerant Circuit leakage or blockage

PCB Faulty

Yes

Clear up the air inlet and outlet or the heat exchanger of indoor and outdoor units.

No

Turn off the power supply and turn it on 10 minutes later.

Yes

Check if the unit can start normally.

No No Correct the connection.

Yes

Check if the refrigerant charge volume is normal?

Check if all the connections, especially if the OLP (Over Load

Protector) sensor is good.

Yes

Measure the resistance between the two ports of the OLP. Is it zero?

No Replace the OLP.

No

Yes

Yes Replace the outdoor control PCB.

Refrigerant system is blocked, such as capillary or welded point of pipes.

or welded joints of pipes.

Fix blockage or replace blocked component.

Recharge the correct refrigerant volume.

46

44


10.3.9 Inverter Compressor Drive Error Diagnosis and Solution (P4)

Error Code

P4


Possible Causes

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

●

Wiring mistake

●

●

●

●

IPM Malfunction

Outdoor Fan Assembly Faulty

Compressor Malfunction

Outdoor PCB Faulty


Check if the wiring between main

PCB and compressor connected by error and if the wires and connectors are broken?

Yes

Correct the connection or replace the wires and connectors.

No

IPM continuity check. Check if the

IPM terminal resistance values are uniform. Refer to page 64.

No

Replace the IPM board or replace the main PCB if the IPM board and main

PCB are integrated together.

Yes

Check if the outdoor fan runs properly or the outdoor unit ventilation is good.

Yes

Check if the compressor resistance values are uniform .Refer to page 63.

Yes

Replace the outdoor main PCB if the main PCB and IPM are separate.

No

No

For MSV1-09HRFN1-MT0W and MSV1-12HRFN1- MT0W models, r efer to the solution of fan speed has been out of control malfunction . Find out the cause and have it solved. For other models, please refer to the below remark, check whether the resistance of the fan motor is normal. If not, replace the fan motor.

Replace the compressor.

47

45


10.3.9 Index: Compressor Resistance

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

Position

Blue - Red

Blue - Black

Red - Blue

DA108X1C-23EZ

1.1Ω

(20℃/68℉)

Resistance Value

DA130M1C-31FZ

1.77Ω

(20℃/68℉)

DA150S1C-20FZ

0.95Ω

(20℃/68℉)

Heat Controller

48

46


10.4: Pressure on Service Port

10.4.1 Cooling:

℉

(℃)

PSI

PSI

PSI

℉

(℃) ODT

IDT

BAR 70/59

75

（

23.89）

8.2

BAR 75/63

BAR 80/67

8.6

9.3

ODT

IDT 75

（

23.89）

70/59 119

75/63

80/67

124

135

℉

(℃) ODT

IDT

MPA 70/59

75

（

23.89）

0.82

MPA 75/63

MPA 80/67

0.86

0.93

12.0

85

（

29.44）

7.8

8.3

8.9

95

（

35）

8.1

8.7

9.1

85

（

29.44）

113

120

129

85

（

29.44）

0.78

0.83

0.89

95

（

35）

117

126

132

95

（

35）

0.81

0.87

0.91

105

（

40.56）

8.6

9.1

9.6

115

（

46.11）

10.1

10.7

11.2

105

（

40.56）

125

132

140

115

（

46.11）

147

155

162

105

（

40.56）

0.86

0.91

0.96

115

（

46.11）

1.01

1.07

1.12

10.0

8.0

6.0

4.0

2.0

0.0

75 （23.89） 85 （29.44） 95 （35） 105 （40.56） 115 （46.11）

70/59

75/63

80/67

49

47


40.0

35.0

30.0

25.0

20.0

15.0

10.0

5.0

0.0

℉

(℃)

BAR

BAR

BAR

10.4.2

Heating Chart:

IDT

ODT

57/53

(13.89/11.67)

55

65

75

30.3

32.5

33.8

℉

(℃)

PSI

PSI

PSI

IDT

ODT

57/53

(13.89/11.67)

55

65

75

439

471

489

℉

(℃)

IDT

ODT

MPA 55

57/53

(13.89/11.67)

3.03

MPA 65

MPA 75

3.25

3.38

57/53

(13.89/11.67)

47/43

(8.33/6.11)

47/43

(8.33/6.11)

28.5

30.0

31.5

47/43

(8.33/6.11)

413

435

457

47/43

(8.33/6.11)

2.85

3.00

3.15

37/33

(2.78/0.56)

37/33

(2.78/0.56)

25.3

26.6

27.8

37/33

(2.78/0.56)

367

386

403

37/33

(2.78/0.56)

2.53

2.66

2.78

27/23

(-2.78/-5)

27/23

(-2.78/-5)

22.8

25.4

26.3

27/23

(-2.78/-5)

330

368

381

27/23

(-2.78/-5)

2.28

2.54

2.63

17/13

(-8.33/-10.56)

20.8

23.3

24.9

17/13

(-8.33/-10.56)

302

339

362

17/13

(-8.33/-10.56)

2.08

2.33

2.49

17/13

(-8.33/-10.56)

55

65

75

50

48

40.0

35.0

30.0

25.0

20.0

15.0

10.0

5.0

0.0

℉

(℃)

BAR

BAR

BAR

10.4.2

Heating Chart:

IDT

ODT

57/53

(13.89/11.67)

55

65

75

30.3

32.5

33.8

℉

(℃)

PSI

PSI

PSI

IDT

ODT

57/53

(13.89/11.67)

55

65

75

439

471

489

℉

(℃)

IDT

ODT

MPA 55

57/53

(13.89/11.67)

3.03

MPA 65

MPA 75

3.25

3.38

57/53

(13.89/11.67)

47/43

(8.33/6.11)

47/43

(8.33/6.11)

28.5

30.0

31.5

47/43

(8.33/6.11)

413

435

457

47/43

(8.33/6.11)

2.85

3.00

3.15

37/33

(2.78/0.56)

37/33

(2.78/0.56)

25.3

26.6

27.8

37/33

(2.78/0.56)

367

386

403

37/33

(2.78/0.56)

2.53

2.66

2.78

27/23

(-2.78/-5)

27/23

(-2.78/-5)

22.8

25.4

26.3

27/23

(-2.78/-5)

330

368

381

27/23

(-2.78/-5)

2.28

2.54

2.63

17/13

(-8.33/-10.56)

20.8

23.3

24.9

17/13

(-8.33/-10.56)

302

339

362

17/13

(-8.33/-10.56)

2.08

2.33

2.49

17/13

(-8.33/-10.56)

55

65

75


This page is left intentionally blank.

51

48


AITONS/MARS 35 Brownridge Road, Unit 6, Halton Hills, ON L7G 0C6 • 1-888-744-2911 • [email protected] • www.aitons.com

4/2014

52

Heat Controller A-DVC18SD-1 Service manual

SERVICE MANUAL

Inverter Single Zone

Ductless Mini-Split

TABLE OF CONTENTS

WARNING

1. Precaution

1.1 Safety Precaution

1.2 Warning



Installation



CAUTION



Operational

2. Part Identification and Functions

2.1 Model Numbers of Indoor/Outdoor units

2.2 Required Clearances for Indoor and Outdoor units

2.3 Features

2.3.1 Description of Features and Functions

3. Dimensional Data

3.1 Indoor Unit

3.2 Indoor Unit Mounting Bracket

3.3 Outdoor Unit

4. Refrigerant Cycle Diagram

4.1 Cooling Only Models (DVC):

INDOOR

OUTDOOR

4.2 Heat Pump Models (DVH):

INDOOR

OUTDOOR

5.0 Wiring Diagrams:

5.1 Indoor Units:

B-DVC09SD-0, B-DVH09SC-0, B-DVH12SD-0, B-DVH12SD-0

B-DVC18SD-1, B-DVH18SD-1

B-DVC24SD-1, B-DVH24SD-1

5.2 Outdoor Units

A-DVC09SD-0, A-DVH09SD-0, A-DVC12SD-0, A-DVH12SD-0

A-DVC18SD-1, A-DVH18SD-1

6 Installation Details

6.1 Electrical

6.2 Line Set Connection Sizes

6.4 Field Charging:

6.3 Line Set Lengths and Elevations

7. Operating Conditions

8. Electronic Display Functions

8.1 Abbreviations

8.2 Display functions

8.3 Main Protection

9.0 Operation Modes and Functions

9.1 Fan Only Mode

≥

9.2 Cooling Mode

9.3 HEATING MODE

9.4 Defrost Mode

9.5 Evaporator Coil Temp. Protection

9.6 Auto-Mode

9.7 Dry mode

9.8 Forced Operation

9.9 Timer function

9.10 Sleep Mode

9.11 Auto-Restart Function

9.12 Automatic panel function

9.13 47°F(8°C) Heating

10. Troubleshooting

10.1 Indoor Unit Error Codes

A-DVC24SD-1, A-DVH24SD-1

DVC18SD-1 and DVH18SD-1

DVC18SD-1 and DVH18SD-1 LED3 and LED4 Error Codes:

10.3 Diagnosis and Solution

10.3.1 EEPROM Parameter Error Diagnosis and Solution (E0/F4)

10.3.2 Indoor / Outdoor Unit Communication Error Diagnosis and Solution (E1)

* Note: See next page for masuring Vs and the resistance of the reactor.

10.3.3 Zero Crossing Detection Error Diagnosis and Solution (E2)

10.3.4 Fan Speed is Out of Control Diagnosis and Solution (E3)

10.3.4 Index 1: Indoor AC Fan Motor

10.3.4 Index 2: Indoor AC Fan Motor

10.3.5 Open or Short Circuit of Temperature Sensor Diagnosis and Solution (E5)

T1, T2, T3,T4 Temperature Sensor Resistance Value Table

T5 Temperature Sensor Resistance Value Table