Midea DLCERAA12AAJ, DLCERAA24AAK, DLCERAA12AAK, DLCERAA18AAK, DLCERAH09AAK Service Manual

...

DLCERA

SERVICE MANUAL

Outdoor Unit Single Zone Ductless System − Sizes 09 to 24

TABLE OF CONTENTS

PAGE

SAFETY CONSIDERATIONS 1.............................

INTRODUCTION 1.......................................

MODEL/SERIAL NUMBER NOMENCLATURES 2.............

SPECIFICATIONS 3.......................................

DIMENSIONS 5.........................................

CLEARANCES 8.........................................

ELECTRICAL DATA 9....................................

WIRING 9...............................................

CONNECTION DIAGRAMS 10.............................

WIRING DIAGRAM 10....................................

REFRIGERATION CYCLE DIAGRAMS 14....................

REFRIGERANT LINES 15.................................

SYSTEM EVACUATION AND CHARGING 16.................

ELECTRONIC FUNCTIONS 17.............................

TROUBLESHOOTING 21..................................

OUTDOOR UNIT DIAGNOSTIC GUIDES 22..................

PCB DIAGRAMS 23......................................

DIAGNOSIS AND SOLUTION 25...........................

DISASSEMBLY INSTRUCTIONS 46.........................

APPENDIX 69...........................................

SAFETY CONSIDERATIONS

Installing, starting up, and servicing air−conditioning equipment can be hazardous due to system pressures, electrical components, and equipment location (roofs, elevated structures, etc.).

Only trained, qualified installers and service mechanics should install, start−up, and service this equipment.

Untrained personnel can perform basic maintenance functions such as cleaning coils. All other operations should be performed by trained service personnel.

When working on the equipment, observe precautions in the literature and on tags, stickers, and labels attached to the equipment.

Follow all safety codes. Wear safety glasses and work gloves. Keep quenching cloth and fire extinguisher nearby when brazing. Use care in handling, rigging, and setting bulky equipment.

Read this manual thoroughly and follow all warnings or cautions included in literature and attached to the unit. Consult local building codes and National Electrical Code (NEC) for special requirements. Recognize safety

information. This is the safety−alert symbol on the unit and in instructions or manuals, be alert to the potential for personal injury. Understand these signal words: DANGER, W ARNI NG, and CAUTION.

. When you see this symbol

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

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 outdoor 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.

Specifications subject to change without notice.

MODEL/SERIAL NUMBER NOMENCLATURES

Table 1—Unit Sizes

SYSTEM TONS BTUh VOLTAGE - PHASE OUTDOOR MODEL

1.00 12,000 115-1 DLCERAA12AAJ

Cooling Only

Heating Pump

DLC = CONDENSING UNIT

E = MODEL

1.00 12,000 208/230-1 DLCERAA12AAK

1.50 18,000 208/230-1 DLCERAA18AAK

2.00 24,000 208/230-1 DLCERAA24AAK

1.00 12,000 115-1 DLCERAH12AAJ

0.75 9,000 208/230-1 DLCERAH09AAK

1.00 12,000 208/230-1 DLCERAH12AAK

1.50 18,000 208/230-1 DLCERAH18AAK

2.00 24,000 208/230-1 DLCERAH24AAK

OUTDOOR UNIT

DLC E KH

AR09

VOLTAGE J =115-1-60 K = 208/230-1-60

UNIT TYPE R = OUTDOOR UNIT

A = MAJOR SERIES

SYSTEM TYPE A = COOLING ONLY H = HEAT PUMP

V = All Models

Year of Manufacture

18 01

MAXIMUM NUMBER OF FAN COIL UNITS THAT CAN BE CONNECTED TO THE OUTDOOR UNIT

A = 1:1

10001

Sequential Serial Number

Week of Manufacture

A = VARIATION

NOMINAL CAPACITY 09 - 3/4 TON 12 - 1 TON 18 - 1.5 TONS 24 - 2 TONS

Use of the AHRI Certified TM Mark indicates a manufacturer’s participation in the program For verification of certification for individual products, go to www.ahridirectory.org.

2 32808001101

Specifications subject to change without notice.

SPECIFICATIONS

System

Electrical

Operating

Piping

Refrigerant

Outdoor Coil

Compressor

Outdoor

* Condensing unit above or below the indoor unit

Size 12K 12K 18K 24K

Outdoor Model DLCERAA12AAJ DLCERAA12AAK DLCERAA18AAK DLCERAA24AAK Voltage, Phase, Cycle V/Ph/Hz 115-1-60 208/230-1-60 208/230-1-60 208/230-1-60 MCA A. 13 7 11 16 MOCP - Fuse Rating A. 20 15 15 25 Cooling Outdoor DB

Min - Max Total Piping Length ft (m) 82 (25) 82 (25) 98 (30) 164 (50) Piping Lift Pipe Connection Size - Liquid In.(mm) 1/4 (6.35) 1/4 (6.35) 1/4 (6.35) 3/8 (9.52) Pipe Connection

Size - Suction Ty pe R410A R410A R410A R410A Charge lbs (kg) 1.30 (0.59) 1.30 (0.59) 2.09 (0.95) 2.64 (1.20) Metering Device EEV EEV EEV EEV Face Area Sq. Ft. 4.15 4.15 4.78 4.78 No. Rows 1 1 2 2 Fins per inch 22 22 22 22 Circuits 2 2 4 6 Ty pe Rotary Inverter Rotary Inverter Rotary Inverter Rotary Inverter Model ASN98D22UFZ ASN98D22UFZ ASM135D23UFZ ATF235D22UMT Oil Type VG74 VG74 VG74 VG74 Oil Charge Fl. Oz. 13.0 13.0 13.0 23.6 Rated Current RLA 9.5 4.5 7.0 11.0 Unit Width In.(mm) 30.31(770) 30.31(770) 31.50(800) 33.27(845) Unit Height In.(mm) 21.85(555) 21.85(555) 21.81(554) 27.64(702) Unit Depth In.(mm) 11.81(300) 11.81(300) 13.11(333) 14.29(363) Net Weight lbs (kg) 57.8(26.2) 53.8(24.4) 70.1(31.8) 88.6(40.2) Airflow CFM 1,170 1,170 1,170 1,880 Sound Pressure dB(A) 52.0 54.0 57.0 59.5

T able 2—Specifications (Cooling Only)

COOLING ONLY

°F(°C) 0~ 122 (-17~ 50) 0~ 122 (-17~ 50) 0~ 122 (-17~ 50) 0~ 122 (-17~ 50)

ft (m) 33 (10) 33 (10) 66 (20) 66 (20)

In.(mm) 1/2 (12.7) 1/2 (12.7) 1/2 (12.7) 5/8 (16)

32808001101 3

Specifications subject to change without notice.

SPECIFICATIONS (CONT)

System

Electrical

Operating

Range

Piping

Refrigerant

Outdoor Coil

Compressor

Outdoor

* Condensing unit above or below the indoor unit

Size 12 9 12 18 24

Outdoor Model DLCERAH12AAJ DLCERAH09AAK DLCERAH12AAK DLCERAH18AAK DLCERAH24AAK Voltage, Phase, Cycle V/Ph/Hz 115-1-60 208/230-1-60 208/230-1-60 208/230-1-60 208/230-1-60 MCA A. 13 8 10 15 18 MOCP - Fuse Rating A. 20 15 15 20 25 Cooling Outdoor DB Min

- Max Heating Outdoor DB Min

- Max Total Piping Length ft (m) 82 (25) 82 (25) 82 (25) 98 (30) 164 (50) Piping Lift Pipe Connection

Size - Liquid Pipe Connection

Size - Suction Ty pe R410A R410A R410A R410A R410A Charge lbs (kg) 2.11 (0.96) 1.76 (0.80) 2.11 (0.96) 2.82 (1.28) 3.97 (1.80) Metering Device EEV EEV EEV EEV EEV Face Area Sq. Ft. 4.1 4.1 4.1 4.7 5.3 No. Rows 1.5 1 1.5 2 2 Fins per inch 18 18 18 18 18 Circuits 4 2 4 4 4 Ty pe Rotary Inverter Rotary Inverter Rotary Inverter Rotary Inverter Rotary Inverter Model ASN98D22UFZ ASN98D22UFZ ASN98D22UFZ ASM135D23UFZ ATF235D22UMT Oil Type VG74 VG74 VG74 VG74 VG74 Oil Charge Fl. Oz. 13.0 13.0 13.0 15.8 23.6 Rated Current RLA 9.5 5.5 6.8 10.5 12.0 Unit Width In.(mm) 30.31(770) 30.31(770) 30.31(770) 31.50(800) 33.27(845) Unit Height In.(mm) 21.85(555) 21.85(555) 21.85(555) 21.81(554) 27.64(702) Unit Depth In.(mm) 11.81(300) 11.81(300) 11.81(300) 13.11(333) 14.29(363) Net Weight lbs (kg) 69.0(31.3) 63(28.6) 65.5(29.7) 79.6(36.1) 114.2(51.8) Airflow CFM 1,170 1,170 1,170 1,170 1,765 Sound Pressure dB(A) 54.5 57.2 57.4 57.0 60.2

°F(°C) 0~ 122 (-17~ 50) 0~ 122 (-17~ 50) 0~ 122 (-17~ 50) 0~ 122 (-17~ 50) 0~ 122 (-17~50)

°F(°C) 0~ 86 (-17~ 30) 0~ 86 (-17~ 30) 0~ 86 (-17~ 30) 0~ 86 (-17~ 30) 0~ 86 (-17~30)

ft (m) 33 (10) 33 (10) 33 (10) 66 (20) 66 (20)

In.(mm) 1/4 (6.35) 1/4 (6.35) 1/4 (6.35) 1/4 (6.35) 3/8 (9.52)

In.(mm) 1/2 (12.7) 3/8 (9.52) 1/2 (12.7) 1/2 (12.7) 5/8 (16)

Table 3—Specifications (Heat Pump)

HEAT PUMP

4 32808001101

Specifications subject to change without notice.

DIMENSIONS

System Size Height (H) in. (mm) Width (W) in. (mm) Depth (D) in. (mm) Weight-Net lbs. (kg)

Cooling

Only

Heat

Pump

12K (115V) 21.85(555) 30.31(770) 11.81(300) 57.8(26.2)

12K (208/230V) 21.85(555) 30.31(770) 11.81(300) 53.8(24.4)

18K (208/230V) 21.81(554) 31.50(800) 13.11(333) 70.1(31.8)

24K (208/230V) 27.64(702) 33.27(845) 14.29(363) 88.6(40.2)

System Size Height (H) in. (mm) Width (W) in. (mm) Depth (D) in. (mm) Weight-Net lbs. (kg)

12K (115V) 21.85(555) 30.31(770) 11.81(300) 69.0(31.3)

9K (208/230V) 21.85(555) 30.31(770) 11.81(300) 63.0(28.6)

12K (208/230V) 21.85(555) 30.31(770) 11.81(300) 65.5(29.7) 18K (208/230V) 21.81(554) 31.50(800) 13.11(333) 79.6(36.1）

24K (208/230V) 27.64(702) 33.27(845) 14.29(363) 114.2(51.8)

T able 4—Dimensions

30.66(779) W3

21.85(555)

11.81(300) D

0.47(12)

19.17(487) W1

30.31(770) W

2.76(70) W

0.98(25) B1

3.54(90) B2

11.26(286)

13.07(322)

2.36(60)

2.42(61.5) A2

11.73(298)

.24(6)

3.66(93)

0.47(12) A1

Unit: inch(mm)

Fig. 1 - Sizes 9K and 12K

32808001101 5

Specifications subject to change without notice.

DIMENSIONS − OUTDOOR (CONT)

21.81 (554)

0.47 (1 2)

13.11

(333)

20.24 (514)

31.50 (800)

4.17 (1 06)

12.80 (325)

2.36 (6 0)

3.37 (8 5.5)

12.24 (311)

)

0.87 (2 2)

2.43 (6 1.6)

2.43 (6 1.8)

)

(

Unit: inch(mm)

2.76 (7 0)

13.39 (340)

Fig. 2 - Size 18K

6 32808001101

Specifications subject to change without notice.

DIMENSIONS − OUTDOOR (CONT)

32808001101 7

Unit: inch (mm)

Fig. 3 - Size 24K

Specifications subject to change without notice.

CLEARANCES

Air-outlet

Fig. 4 - Outdoor Unit Clearance

Table 5—Clearances

UNIT MINIMUM VALUE in. (mm)

A 24 (610)

B 24 (610)

C 24 (610)

D 4 (101)

E 4 (101)

Air-inlet

NOTE: The outdoor unit must be mounted at least 2in. (50mm) above the maximum anticipated snow depth.

9.8in (25cm) or more for proper airow 24in (61cm) or more is recommended for service

59in (150cm)

or more on a

multiple parallel

unit arrangement

24in (61cm) or more

on a single parallel

unit arrangement

24in (60cm) or more

118in (300cm) or more

19in (48cm) or more on a multiple parallel unit arrangement 4in (10cm) or more on a single parallel unit arrangement

Fig. 5 - Clearances for Multiple Units

8 32808001101

Specifications subject to change without notice.

ELECTRICAL DATA

Table 6—Electrical Data

Outdoor Unit Size 12K 12K 18K 24K

Cooling Only

Power Supply

Compressor RLA 9.5 4.5 7 11

Outdoor Fan Motor

Heat Pump

Power Supply

Compressor RLA 10.5 5.5 6.8 11.5 12

Outdoor Fan Motor

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

LEGEND

FLA - Full Load Amps MCA - Minimum Circuit Amps MOCP - Maximum Over-Current Protection RLA - Rated Load Amps

Volts-PH-Hz (115V) (208/230V) (208/230V) (208/230V)

Max – Min*

Oper. Voltage

MCA 7 7 11 16

MOCP 15 15 15 25

FLA 0.6 0.4 0.5 0.6

Rated HP 0.054 0.054 0.065 0.068

Output 40 40 48 45

Outdoor Unit Size 12K 9K 12K 18K 24K

Volts-PH-Hz (115V) (208/230V) (208/230V) (208/230V) (208/230V)

Max – Min*

Oper. Voltage

MCA 13 8 10 15 18

MOCP 20 15 15 20 25

FLA 0.6 0.4 0.4 0.5 0.6

Rated HP 0.054 0.054 0.054 0.054 0.068

Output 40 40 40 40 50

127-104 253-187 253-187 253-187 253-187

127-104 253-187 253-187 253-187

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. T wo 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.

CAUTION

EQUIPMENT DAMAGE HAZARD

Failure to follow this caution may result in equipment damage or improper operation. Wires should be sized based on NEC and local codes.

CAUTION

EQUIPMENT DAMAGE HAZARD

Failure to follow this caution may result in equipment damage or improper operation.

S Be sure to comply with local codes while running wire from

the indoor unit to the outdoor unit.

S 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.

S No wire should touch the refrigerant tubing, compressor or

any moving parts.

S Disconnecting means must be provided and shall be located

within sight and readily accessible from the air conditioner.

S Connecting cable with conduit shall be routed through the

hole in the conduit panel.

32808001101 9

Specifications subject to change without notice.

CONNECTION DIAGRAM

16022000B23477

Indoor Unit Power Supply

115-1-60

Indoor Signal High Voltage

115V Indoor Unit 115V Outdoor Unit 230V Indoor Unit 230V Outdoor Unit

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.

WIRING DIAGRAMS

CONNECTING CABLE OUTDOOR TO INDOOR

GND

Ground

NOTE: The connection wires for the reactor and the capacitor should be the same color; either black or brown.

BLUE

RED

BLACK

N Power to Indoor Unit

115-1-60

115-1-60 FIELD POWER SUPPLY

GND

Indoor Signal High Voltage

N Main Power Supply

115-1-60

Fig. 6 - Connection Diagrams

ACITOR CAP

BROWN(BLACK)

REACTOR

BLACK(BROWN)

CN4_2

CN4_3

CN4_1

CN 50

Indoor Unit Power Supply

208/230-1-60

BROWN(BLACK)

Y/G

CN 1A

CN4_4

L1 L2

LBEU

CN 60

CN 17

Indoor Signal High Voltage

BROWN

CONNECTING CABLE OUTDOOR TO INDOOR

GND

Ground

YELLOW OR BLACK

TN IO

J TS

Y/G

72,1'22581,7

OPTIONAL

BLACK

GRA Y

BROWN

BLACK

BROWN 1

4-WAY

GRA Y 3

OPTIONAL

CRANKCASE HEATER

Power to Indoor Unit

208/230-1-60

LBEU

Y/G

9$& 32:(56833/<

208/230-1-60 FIELD POWER SUPPLY

GND

Main

Indoor

Power Supply

Signal High

208/230-1-60

Voltage

COMPRESSOR

Y/G

CN 21

CN 25

CN 7

OPTIONAL: AC-F

-F

Y/G

Notes: This symbol indicates the element is optional, the actual shape shall prevail.

Input: temperature acquisition (0~5VDC)

Output: 0~115 VAC to control AC FAN

Connector for electronic expansion valve(0-12VDC)

Output: 115 VAC to control 4-way valve

&2'(

&1$

&1

&1B&1B &1B&1B

&1

DISCHARGE TEMP. SENSOR

CONDENSER TEMP

AMBIENT TEMP

DC-FAN

OPTIONAL:

. SENSOR

3$571$0( 3$571$0(

Input: 115V high voltage connector with L/N/signal/ground

Output: 0~320VDC to control DC FAN

Output:115VAC High voltage connector for power factor corrector(PFC)

Output: 115VAC to control crankcase heater

Y/G

DC-FAN

&2'(

&1

&1

&1 &1

Fig. 7 - Wiring Diagram Size 12K (115V)

10 32808001101

Specifications subject to change without notice.

WIRING DIAGRAMS (CONT)

Notes: This symbol indicates the element is optional, the actual shape shall prevail.

REACTOR 1005AL

BLUE

OPTIONAL

BLUE

RED

BLACK

COMPRESSOR

DISCHARGE TEMP. SENSOR

Y/G

&2'(

&1$

&1

&1~&1

&1

Input: 220V high voltage connector with L/N/signal/ground

Output: 0~320V DC to connect DC FAN

To connect PFC reactor

Output: 220V AC to connect crankcase heater

3$571$0( 3$571$0(

Fig. 8 - Wiring Diagram − Sizes 09K, 12K (208−230V)

CN 9

CN 32

CN 50

CN 21

CONDENSER TEMP

AMBIENT TEMP. SENSOR

. SENSOR

Y/G

MAIN BOARD

CN 7

DC-FAN

OPTIONAL: DC-FAN

Y/G

&2'(

&1

&1 &1

&1

%

BL UE

CN 1A

CN 60 BLUE

CN 17 RED

CN 25

Input: temperature sensor connector (0~5V DC)

Output: 0~320V AC to connect compressor

Output: 0~220V AC to connect 4-way valve

YELLOW OR BLACK

BROWN

Y/G

INDOOR UNIT

OPTIONAL

4-WAY

OPTIONAL

Output: 0~220V AC to connect AC FAN

CRANKCASE HEATER

CAPACITOR

AC-FAN

Y/G

OPTIONAL:

BLUE OR BLACK

RED

/

POWER SUPPLY

Y/G

32808001101 11

Specifications subject to change without notice.

WIRING DIAGRAMS (CONTINUED)

HEATER 1

OPTIONAL:the electric heating belt of compressor

OPTIONAL˖

NWOR

Y/G

(RED)

Y/G

BLUE

W4AY

(BLACK)

BLACK

δYELLOWε

RED

Y/G

CN16

CN60

CN6-1

CN8 CN7

CN2

BLACK(BLUE)

OUT DOOR DC FAN

CN414

CN3

Applicable to the units adopting DC motor only

OUTDOOR

MAIN

PCB

OUTDOOR AMBIENT TEMPERATURE SENSOR

OUT DOOR AC FAN

BLUE

CN5

CN1

WHITE

CONDENSER TEMPERATURE SENSOR

Applicable to the units adopting AC motor only

PACTICARO

BROWN

CN13

CN12

CN30

CN17

CN10

KCALB

DER

BLAC

DISCHARGE SENSOR

BLUE

RED

2 3

LACK

COMPRESSOR

BLUE

REACTOR

BLUE

RED

ACK

Y/G

72,1'22581,7

&2'(

&1

&1 &1

&1

32:(56833/<

Input: 230V high voltage connector with L1/L2/signal/ground

Input: Temperature acquisition(0-5VDC)

3$571$0( 3$571$0(

Output: PWM for UVW to control Compressor(0~320VAC)

Output: 0~320VDC to control DC FAN

OUTDOOR WIRING DIAGRAM

Fig. 9 - Wiring Diagram Sizes 18K − 24K (Heat Pump Units)

&2'(

&1

&1

&1

CN12/CN13

Output: 0~220VAC to control AC FAN

Output: 220V AC to control crankcase heater

Output: 0~220V AC to control 4-way valve

Output: Connection of the high voltage

(REACTOR)

12 32808001101

Specifications subject to change without notice.

WIRING DIAGRAMS (CONTINUED)

16022000B23636

BLUE

RED

BLACK

COMPRESSOR

Y/G

&2'(

&1

&1

&1

&1

Input: 220V high voltage connector with L1/L2/signal/ground

Input: Temperature acquisition(0-5VDC)

Output: 0~320VDC to control DC FAN

BROWN

Y/G

BLACK

Y/G

According to the real objects

Y/G

BLUE

CN 3

OPTIONAL

,1'22581,7

OPTIONAL

Yellow

4-WAY

CRANKCASE HEATER

CAPACITOR

$&)$1

BLUE RED

BLACK

CN 17

CN 29 CN 28 CN 27

CN 21

OUTDOOR

MAIN

PCB

CN 414

CN 60

Blue

CN 16

Red

CN 5

Notes:

DISCHARGE TEMP. SENSOR

CONDENSER TEMP.

AMBIENT TEMP

. SENSOR

SENSOR

7

Y/G

7

3$571$0( 3$571$0(

DC-FAN

OPTIONAL: DC-FAN

&2'(

&1

Output: PWM for UVW to control Compressor(0~320VAC)

&1

&1

Fig. 10 - Wiring Diagram Sizes 18K − 24K (Cooling Only Units)

Output: 220V AC to control crankcase heater

Output: 0~220V AC to control 4-way valve

This symbol indicates the element is optional, the actual shape shall prevail.

Output: 0~220VAC to control AC FAN

AC-F

Y/G

RED

32:(56833/<

OPTIONAL:

BLUE

Y/G

32808001101 13

Specifications subject to change without notice.

REFRIGERATION CYCLE DIAGRAMS

INDOOR OUTDOOR

HEAT EXCHANGE

(EVAPORATOR)

T2 Evaporator temp. sensor

T1 Room temp. sensor

LIQUID SIDE

2−WAY VALVE

GAS SIDE

3−WAY VALVE

ACCUMULATOR

CHECK VALVE (Heating Model only)

CAPILIARY TUBE

COMPRESSOR

HEAT EXCHANGE (CONDENSER)

4−WAY VALVE

COOLING HEATING

Fig. 11 - Heat Pumps

14 32808001101

Specifications subject to change without notice.

REFRIGERANT LINES

General Refrigerant Line Sizing

1. The outdoor units are shipped with a full charge of R410A refrigerant. All charges, line sizing, and capacities are based on runs of 25ft. (7.6 m). For runs over 25 ft. (7.6 m), consult the long−line applications section for the proper charge adjustments.

2. The minimum refrigerant line length between the indoor and outdoor units is 10 ft. (3 m).

3. Refrigerant lines should not be buried in the ground. If it is necessary to bury the lines, not more than 36 in (914 mm) should be buried. Provide a minimum 6in (152 mm) vertical rise to the service valves to prevent refrigerant migration.

Table 7 lists the maximum lengths allowed.

T able 7—Piping and Refrigerant Information

System Size 12V (115V) 9K (208-230V) 12K (208-230V) 18 (208-230V) 24K (208-230V)

Min. Piping Length ft. (m) 9.8(3) 9.8(3) 9.8(3) 9.8(3) 9.8(3)

Piping

Refrigerant

Standard Piping Length

Max. outdoor-indoor

height difference

(OU higher than IU)

Max. outdoor-indoor

height difference

(IU higher than OU)

Max. Piping Length with no additional refrigerant

charge per System

(Standard Piping length)

Total Max. Piping

Length per system

Additional refrigerant

charge (between Standard

– Max piping length)

Suction Pipe

(size - connection type)

Liquid Pipe

(size - connection type)

Refrigerant Type Type R410A R410A R410A R410A R410A

Cooling Only Models

Charge Amount

Heat Pump Models

Charge Amount

ft. (m)

ft. (m) 24.6(7.5) 24.6(7.5) 24.6(7.5) 24.6(7.5) 24.6(7.5)

ft. (m) 82(25) 82(25) 82(25) 98(30) 98(50)

Oz/ft (g/m) 0.161(15) 0.161(15) 0.161(15) 0.161(15) 0.322(30)

In (mm)

Lbs (kg) 1.30(0.59) 1.06(0.48) 1.30(0.59) 2.1(0.95) 2.65(1.2)

Lbs (kg) 2.12(0.96) 1.76(0.8) 2.12(0.96) 2.82(1.28) 3.97(1.8)

24.6(7.5) 24.6(7.5) 24.6(7.5) 24.6(7.5) 24.6(7.5)

32(10) 32(10) 32(10) 65(20) 65(20)

33(10) 33(10) 33(10) 66(20) 66(20)

ø1/2(12.7) ø3/8(9.52) ø1/2(12.7) ø1/2(12.7) ø5/8(15.9)

ø1/4(6.35) ø1/4(6.35) ø1/4(6.35) ø1/4(6.35) ø3/8(9.52)

4. Both lines must be insulated. Use a minimum of 1/2in. (12.7 mm) thick insulation. Closed−cell insulation is recommended in all long−line applications.

5. Special consideration should be given to isolating interconnecting tubing from the building structure. Isolate the the tubing so vibration or noise is not transmitted into the structure.

IMPORTANT: Both refrigerant lines must be insulated separately.

Long Line Applications:

1. No change in line sizing is required.

2. Add refrigerant per T able 7.

32808001101 15

Specifications subject to change without notice.

SYSTEM EVACUATION AND

CHARGING

UNIT DAMAGE HAZARD

Failure to follow this caution may result in equipment damage or improper operation.

Never use the system compressor as a vacuum pump.

Refrigerant tubes and indoor coil should be evacuated using the recommended deep vacuum method of 500 microns. Always break a vacuum with dry nitrogen.

System Vacuum and Charge

Using Vacuum Pump

1. Completely tighten all flare nuts and connect manifold gage charge hose to a charge port of the low side service valve (see Fig. 12).

2. Connect the charge hose to the vacuum pump.

3. Fully open the low side of manifold gage (see Fig. 13).

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 25 ft. (8 m) of line length. For refrigerant lines longer than 25 ft. (8 m), add refrigerant as specified in the ADDITIONAL REFRIGERANT CHARGE table in this document.

8. Disconnect the charge hose from the charge connection of the low side service valve.

9. Fully open service valves B and A.

10. Securely tighten the service valves caps.

Outdoor Unit

Service Valve

500 microns

Low side valve

Charge hose

CAUTION

Refrigerant

Low Side

High Side

Fig. 12 - Service Valve

Manifold Gage

High side valve

Charge hose

Low side valve

Fig. 13 - Manifold

Indoor Uni

Vacuum pump

Deep Vacuum Method

The deep vacuum method requires a vacuum pump capable of pulling a vacuum of 500 microns and a vacuum gage capable of accurately measuring this vacuum depth. The deep vacuum method is the most positive way of assuring a system is free of air and liquid water (see Fig.

14).

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. 14 - Deep Vacuum Graph

Triple Evacuation Method

The triple evacuation method should be used. Refer to Fig. 15 and proceed as follows:

1. Pump the system down to 1500 microns and allow the pump to continue operating for an additional 15 minutes.

2. Close the service valves and shut off the vacuum pump.

3. Connect a dry nitrogen cylinder and regulator to the system and break vacuum until the system reaches 2 psig.

4. Close the service valve and allow the system to stand for 1hr. During this time, the dry nitrogen can diffuse throughout the system absorbing moisture.

5. Pump the system down to 1000 microns.

6. Break the vacuum with dry nitrogen (2 psig).

7. Pump the system down to 500 microns.

8. Perform the hold test for 30 minutes.

EVACUATE TO 1500 MICRONS

BREAK VACUUM WITH DRY NITROGEN TO 2 PSIG

EVACUATE TO 1000 MICRONS

BREAK VACUUM WITH DRY NITROGEN TO 2 PSIG

EVACUATE TO 500 MICRONS MINIMUM (HOLD FOR 30 MINUTES)

CHECK FOR TIGHT, DRY SYSTEM

(IF IT HOLDS DEEP VACUUM)

RELEASE CHARGE INTO SYSTEM BY OPENING VALVES COMPLETELY

Fig. 15 - 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.

16 32808001101

Specifications subject to change without notice.

ELECTRONIC FUNCTIONS

Abbreviation

T1: Indoor room temperature T2: Coil temperature of evaporator T3: Coil temperature of condenser T4: Outdoor ambient temperature T5: Compressor discharge temperature

Display function Icon explanation on indoor display board

Fig. 16 - Digital display

S Displays the temperature settings when the air conditioner is

operational.

S Displays the room temperature in FAN mode. S Displays the self−diagnostic codes.

S Displays for three seconds when Timer ON, Fresh,

Swing, Turbo or Silence feature is activated.

S Displays for three seconds when Fresh, Swing, Turbo, or

Silence feature is cancelled.

S Displays under defrosting operation. S Displays when anti−cold air feature is activated under

heating mode.

S Displays during self clean operation (if applicable). S Displays under 8°C heating operation (if applicable). S When ECO function (optional) is activated, the

illuminates gradually one by one as

in one second intervals.

Fig. 17 - WIFI control display (optional)

Displays when the WIFI control feature is activated (Not available on some units).

NOTE: A guide on using the infrared remote is not included in this literature package.

Main Protection

Three minute delay for compressor restart

Less than a 1 minute delay for the initial start*up and a 3 minute delay for subsequent starts.

Compressor top temperature protection

The unit stops working when the compressor top temperature protector cuts off, and restarts after the compressor top temperatrue protector restarts.

Compressor discharge temperature protection

Compressor discharge temp. T5>239_F(115_C) for 5s, compressor stops.

Fan Speed is Out of Control

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

Inverter module protection

The inverter module has a protection function for current, voltage and temperature. If any of these protections engage, the corresponding code displays on the indoor unit and the unit stops working.

Compressor preheating functions

Preheating permitting condition: When the T4 (outdoor ambient temperature)<37.4

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.

Refrigerant leakage detection

This function is only active in the COOLING mode. The function helps prevent the compressor from being damaged by a refrigerant leakage or a compressor overload.

Open condition: When the compressor is active, the evaporator T2 coil temperature

value has no or very little change.

_F (3_C), the preheating function engages.

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.

5. Auto fan

32808001101 17

Specifications subject to change without notice.

Fig. 18 - Auto Fan COOLING Mode Compressor Running Rules:

S When T1*Ts < 28.4_F(*2_C), the compressor stops. S When T1*TS > 31.1_F(*0.5_C), the compressor activates. S When the AC runs in the mute mode, the compressor runs

with low frequency.

S When the current is more than setting value, the current

protection function activates, and the compressor stops.

Outdoor Fan Running Rules:

The outdoor unit runs at a different fan speed according to T4. For different outdoor units, the fan speeds differ.

Fig. 21 - Compressor Temperature Protection

When the condenser temperature temperature is higher than the setting value, the compressor stops.

Compressor Running Rules

When T1−Ts>−ΔT, the compressor stops, when T1−TS<ΔT−1.5，the compressor will be on. ΔT is the programmed parameter of temperature compensation. When the AC run in mute mode, the compressor runs with low frequency.

When the current is more than setting value, the current protection function is activated and the compressor stops.

Outdoor Fan Running Rules

The outdoor unit runs at different fan speed according to T4. For different outdoor units, the fan speeds are different.

Fig. 19 - Outdoor Fan Running Rules

The auto fan adheres to the following rules.

Fig. 20 - Auto Fan

Fig. 22 - Outdoor Fan Running Rules

Auto Fan Action in HEATING Mode

18 32808001101

Specifications subject to change without notice.

T able 8—Auto Mode

ΔT=T1-Ts Running mode

Fig. 23 - Auto Fan Action in HEATING Mode

DEFROST Mode

The air conditioner enters the DEFROST mode according to the T3 temperature value and the T3 temperature change value range plus the compressor running time.

During the DEFROST mode, the compressor continues to runs, the indoor and outdoor motors stop, and the indoor unit defrost lamp

illuminates and If any one of the following items is satisfied, the defrosting finishes and

the machine reverts to the normal heating mode.

−−−−T3 rises to be higher than TCDE1

−−−−T3 keeps to be higher than TCDE2

−−−−The machine has run for 15 minutes in defrosting mode.

Evaporator Coil Temperature Protection

appears.

_C.

_C for 80 seconds.

TEstop

TEdown

TEH2

Fig. 24 - Evaporator Coil Temperature Protection

NOTE: The following applies to Fig. 24:

Off

Decrease

Hold Resume

S Off: Compressor stops S Decrease: Decrease the running frequency to the lower level S Hold: Keep the current frequency S Resume: No limitation for frequency

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

In the AUTO mode, the machine chooses the COOLING, HEATING or FAN−ONLY mode according to

_F(17_C)~86_F(30_C).

ΔT (ΔT =T1−Ts).

ΔT＞2℃ Cooling

-2≤ΔT≤2℃ Fan-only

ΔT<-2℃ Heating

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 15 minutes and then chooses the mode according to T1−Ts. If the setting temperature is modified, the machine chooses the running function again.

DRY mode Indoor fan speed is fixed at breeze and can not be changed.

The louver angle is the same as in the cooling mode.

Low indoor room temperature protection

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

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

(10 temperature exceeds 53.6

Evaporator anti*freezing protection, condenser high temperature protection and outdoor unit frequency limit are active and are the same as that in the cooling mode. The outdoor fan operates the same as in cooling mode.

Forced Operation Function

_F (12_C).

S Enter forced operation function: When the machine is off,

press Touch to engage the the Forced Auto Mode. Press Touch again, within 5 seconds, to engage the Forced Cooling

Mode. In Forced Auto, forced cooling or any other operation mode, press the touch button to turn off the unit. In the forced operation mode, all general protections and remote control are available.

Operation rules:

S Forced cooling mode: The compressor runs at the F2

frequency and the indoor fan runs as a breeze. After running for 30 minutes, the unit enters the auto mode as 75.2

_C) setting temperature.

(24

S Forced auto mode: The forced auto mode is the same as the

normal auto mode with a 75.2

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

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.

_F(24_C) setting temperature.

_F (24_C) setting temperature.

32808001101 19

Specifications subject to change without notice.

Refrigerant Leak 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.

Open Condition: When the compressor is active, the value of the Coil temperature of evaporator T2 has no change or very little change.

_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.

Point Check Function

Press the remote controller’s LED DISPLAY or LED or MUTE button three times, and then press the AIR DIRECTION or SWING button three times in ten seconds, the buzzer rings for two seconds. The air conditioner enters into the information enquiry status.

Press the LED DISPLAY or AIR DIRECTION button to check the next or front item’s information. When the air conditioner enters the information enquiry status, it displays the code name in 2 seconds (see Table 9).

T able 9—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

20 32808001101

Specifications subject to change without notice.

When the air conditioner enters the information enquiry status, it displays the code value for 25 seconds (see Table 10).

T able 10—Information Enquiry

ENQUIRY

INFORMATION

T1,T2,T3,T4,

T2B,TP,TH,

Targeted

Frequency,

Actual

Frequency

Indoor fan speed

/Outdoor fan speed

EXV opening angle 0-FF

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 0-255 minutes

0-99

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

Low speed, Medium speed, High

Actual fan speed = Display value

For the detailed meaning, please

speed, Turbo

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.

consult with engineer

1. The displaying temperature is the actual value.

2. The temperature is _C no matter what kind of remote con troller 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

32808001101 21

Specifications subject to change without notice.

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. 25 - Electrolytic Capacitors

For other models, please connect discharge resistance (approximately 100 electrolytic capacitor on the contrary side of the outdoor PCB.

Fig. 26 - Discharge Position

NOTE: Fig. 26 is for reference only. The plug on your unit may differ.

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

22 32808001101

Specifications subject to change without notice.

+ 50 hidden pages

Midea DLCERAA12AAJ, DLCERAA24AAK, DLCERAA12AAK, DLCERAA18AAK, DLCERAH09AAK Service Manual

Specifications and Main Features

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