Carrier 38MHRBQ12AA3 User Manual

38MHRB

Outdoor Unit Single Zone Ductless System Sizes 09 to 24

Service Manual

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 DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 REFRIGERATION CYCLE DIAGRAMS . . . . . . . . . . . . . . . . 17 REFRIGERANT LINES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 SYSTEM EVACUATION AND CHARGING . . . . . . . . . . . . . 19 ELECTRONIC FUNCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . 18 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 OUTDOOR UNIT DIAGNOSTIC GUIDES . . . . . . . . . . . . . . 24 PCB DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 DIAGNOSIS AND SOLUTION . . . . . . . . . . . . . . . . . . . . . . . 27 DISASSEMBLY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . 48 APPENDIX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

SAFETY CONSIDERATIONS

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

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

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

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

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

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

Recognize safety information. This is the safety−alert symbol !! . When you see this symbol on the unit and in instructions or manuals, be alert to the potential for personal injury. Understand these signal words: DANGER, WARNING, and CAUTION.

These words are used with the safety−alert symbol. DANGER identifies the most serious hazards which will result in severe personal injury or death. WARNING signifies hazards which could result in personal injury or death. CAUTION is used to identify unsafe practices which may result in minor personal injury or product and property damage. NOTE is used to highlight suggestions which will result in enhanced installation, reliability, or operation.

!WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury or death.

Before installing, modifying, or servicing system, main electrical disconnect switch must be in the OFF position. There may be more than 1 disconnect switch. Lock out and tag switch with a suitable warning label.

!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

EQUIPMENT DAMAGE HAZARD

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

Do not bury more than 36 in. (914 mm) of refrigerant pipe in the ground. If any section of pipe is buried, there must be a 6 in. (152 mm) vertical rise to the valve connections on the outdoor units. If more than the recommended length is buried, refrigerant may migrate to the cooler buried section during extended periods of system shutdown. This causes refrigerant slugging and could possibly damage the compressor at start−up.

INTRODUCTION

This Service Manual provides the necessary information to service, repair, and maintain the 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.

MODEL/SERIAL NUMBER NOMENCLATURES

Table 1—Unit Sizes

	SYSTEM TONS	BTUh	VOLTAGE - PHASE	OUTDOOR MODEL
	1.00	12,000	115-1	38MHRBC12AA1
Cooling Only	1.00	12,000	208/230-1	38MHRBC12AA3
	1.50	18,000	208/230-1	38MHRBC18AA3
	2.00	24,000	208/230-1	38MHRBC24AA3
	1.00	12,000	115-1	38MHRBQ12AA1
	0.75	9,000	208/230-1	38MHRBQ09AA3
Heat Pump	1.00	12,000	208/230-1	38MHRBQ12AA3
	1.50	18,000	208/230-1	38MHRBQ18AA3
	2.00	24,000	208/230-1	38MHRBQ24AA3

OUTDOOR UNIT

38

MH

R

B

Q

38 = OUTDOOR UNIT

MH = MODEL

UNIT TYPE

R = OUTDOOR UNIT

MAJOR SERIES

SYSTEM TYPE

C = COOLING ONLY

Q = HEAT PUMP

01 18

Week of Manufacture

Year of Manufacture

09

A

A

3

VOLTAGE

1 =115-1-60

3 = 208/230-1-60

VARIATIONS

A = STANDARD

MAXIMUM NUMBER OF FAN COIL UNITS THAT

CAN BE CONNECTED TO THE OUTDOOR UNIT

A = 1:1

NOMINAL CAPACITY 09 - 3/4 TON

12 - 1 TON

18 - 1-1/2 TONS

24 - 2 TONS

V 10001

Sequential Serial Number

V = ALL MODELS

Use of the AHRI Certified TM Mark indicates a manufacturer’s participation in the program For verification

of certification for individual products, go to www.ahridirectory.org.

2

SPECIFICATIONS

Table 2—Specifications (Cooling Only)

	System	Size		12	12	18	24
		Outdoor Model		38MHRBC12AA1	38MHRBC12AA3	38MHRBC18AA3	38MHRBC24AA3
		Voltage, Phase, Cycle	V/Ph/Hz	115-1-60	208/230-1-60	208/230-1-60	208/230-1-60
	Electrical	MCA	A.	13	11	15	18
		MOCP - Fuse Rating	A.	20	15	20	25
	Operating	Cooling Outdoor DB	°F (°C)	0~122 (-17~50)	0~122 (-17~50)	0~122 (-17~50)	0~122 (-17~50)
	Range	Min - Max
		Total Piping Length	ft (m)	82 (25)	82 (25)	98 (30)	164 (50)
		Piping Lift*	ft (m)	33 (10)	33 (10)	66 (20)	66 (20)
	Piping	Pipe Connection	in (mm)	1/4 (6.35)	1/4 (6.35)	1/4 (6.35)	3/8 (9.52)
		Size - Liquid
		Pipe Connection	in (mm)	1/2 (12.7)	1/2 (12.7)	1/2 (12.7)	5/8 (16)
		Size - Suction
		Type		R410A	R410A	R410A	R410A
	Refrigerant	Charge	lbs (kg)	1.30 (0.59)	1.17 (0.53)	1.98 (0.90)	2.56 (1.16)
		Metering Device		EEV	EEV	EEV	EEV
		Face Area	Sq. Ft.	4.15	4.15	4.15	4.78
	Outdoor Coil	No. Rows		1	1	2	2
		Fins per inch		22	22	22	22
		Circuits		2	2	4	6
		Type		Rotary Inverter	Rotary Inverter	Rotary Inverter	Rotary Inverter
		Model		ASN98D22UFZ	ASK89D29UEZD	ASN140D21UFZ	ATN150D30UFZA
	Compressor	Oil Type		VG74	VG74	VG74	VG74
		Oil Charge	Fl. Oz.	13.0	13.0	15.5	23.6
		Rated Current	RLA	9.5	6.8	9.0	12.0
		Unit Width	in (mm)	30.31 (770)	30.31 (770)	30.31 (770)	33.27 (845)
		Unit Height	in (mm)	21.85 (555)	21.85 (555)	21.85 (555)	27.64 (702)
	Outdoor	Unit Depth	in (mm)	11.81 (300)	11.81 (300)	11.81 (300)	14.29 (363)
		Net Weight	lbs (kg)	57.8 (26.2)	53.8 (24.4)	65.9 (29.9)	88.6 (40.2)
		Airflow	CFM	1,170	1,230	1,195	1,825
		Sound Pressure	dB(A)	52.0	53.6	55.3	58.0

Compatibility

Table 3—Compatibility

	Indoor Unit	38MHRBC12AA1 38MHRBC12AA3 38MHRBC18AA3 38MHRBC24AA3
	40MHHC12---1	●
High Wall	40MHHC12---3		●
	40MHHC18---3			●
	40MHHC24---3				●

Performance

Table 4—Performance

Indoor Model		40MHHC12---1 40MHHC12---3 40MHHC18---3 40MHHC24---3
Energy Star		NO	NO	NO	NO
Cooling System Tons		1.0	1.0	1.4	1.8
High Wall Cooling Rated Capacity	Btu/h	12,000	11,500	17,000	22,000
Cooling Cap. Range Min - Max	Btu/h	4,800~13,200	4,800~13,000	5,800~18,600	4,900~24,100
SEER		17.3	19.0	19.0	18.5
EER		10.7	11.2	10.3	11.1

3

SPECIFICATIONS (CONT)

Table 5—Specifications (Heat Pump)

	System	Size		12	9	12	18	24
		Outdoor Model		38MHRBQ12AA1 38MHRBQ09AA3 38MHRBQ12AA3 38MHRBQ18AA3 38MHRBQ24AA3
		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
	Electrical	MCA	A.	13	8	10	15	18
		MOCP - Fuse Rating	A.	20	15	15	20	25
		Cooling Outdoor DB Min - Max	° F (° C)	0~122	0~122	0~122	0~122	0~122
	Operating			(-17~50)	(-17~50)	(-17~50)	(-17~50)	(-17~50)
	Range	Heating Outdoor DB Min - Max	° F (° C)	0~86	0~86	0~86	0~86	0~86
				(-17~30)	(-17~30)	(-17~30)	(-17~30)	(-17~30)
		Total Piping Length	ft (m)	82 (25)	82 (25)	82 (25)	98 (30)	164 (50)
	Piping	Piping Lift*	ft (m)	33 (10)	33 (10)	33 (10)	66 (20)	66 (20)
		Pipe Connection Size - Liquid	in (mm)	1/4 (6.35)	1/4 (6.35)	1/4 (6.35)	1/4 (6.35)	3/8 (9.52)
		Pipe Connection Size - Suction	in (mm)	1/2 (12.7)	3/8 (9.52)	1/2 (12.7)	1/2 (12.7)	5/8 (16)
		Type		R410A	R410A	R410A	R410A	R410A
	Refrigerant	Charge	lbs (kg)	2.12 (0.96)	1.76 (0.80)	2.12 (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
	Outdoor Coil	No. Rows		1.6	1	1.6	2	2
		Fins per inch		18	18	18	21	18
		Circuits		2	2	4	4	6
		Type		Rotary Inverter	Rotary Inverter	Rotary Inverter	Rotary Inverter	Rotary Inverter
		Model		ASN98D22UFZ	ASN98D22UFZ	ASN98D22UFZ	ASN140D21UFZ	ATF235D22UMT
	Compressor	Oil Type		VG74	VG74	VG74	VG74	VG74
		Oil Charge	Fl. Oz.	13.0	13.0	13.0	15.5	23.6
		Rated Current	RLA	10.5	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)
	Outdoor	Unit Depth	in (mm)	11.81 (300)	11.81 (300)	11.81 (300)	13.11 (333)	14.29 (363)
		Net Weight	lbs (kg)	69 (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

Compatibility

Table 6—Compatibility

	Indoor Unit	38MHRBQ12AA1 38MHRBQ09AA3 38MHRBQ12AA3 38MHRBQ18AA3 38MHRBQ24AA3
	40MHHQ12---1
		●
	40MHHQ09---3		●
High Wall	40MHHQ12---3			●
	40MHHQ18---3				●
	40MHHQ24---3					●

Performance

Table 7—Performance

Indoor Model		40MHHQ12---1 40MHHQ09---3		40MHHQ12---3 40MHHQ18---3 40MHHQ24---3
Energy Star		NO	NO	NO	NO	NO
Cooling System Tons		1.0	0.8	1.0	1.5	2.0
Cooling Rated Capacity	Btu/h	12,000	9,000	12,000	18,000	24,000
Cooling Cap. Range Min - Max	Btu/h	3,700~13,000	3,400~10,500	3,700~13,000	5,500~19,000	8,987~26,585
SEER		19.8	18.5	19.8	19.0	17.3
EER		10	11.2	11.2	11.2	9.7
Heating Rated Capacity (47° F)	Btu/h	12,000	9,800	12,000	18,000	24,800
High Wall	Btu/h	8,000	7,500	9,230	11,600	18,000
Heating Rated Capacity (17° F)
Heating Maximum Capacity (17° F)	Btu/h	8,200	7,850	9,500	11,800	18,300
Heating Maximum Capacity (5° F)	Btu/h	9,000	6,070	8,880	10,150	16,760
Heating Cap. Range Min - Max	Btu/h	3,500~13,500	2,800~11,500	3,500~13,500	6,200~19,000	8,371~25,350
HSPF		10.6	10.0	9.6	10.6	9.6
COP (47° F)	W/W	2.93	3.27	3.22	3.26	3.13
COP (17° F)	W/W	2.58	2.58	2.64	2.64	2.49
COP (5° F)	W/W	1.60	1.60	1.60	1.50	1.40

4

DIMENSIONS

Table 8—Dimensions

		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)	57.8(26.2)
	Cooling	12K	(208/230V)	21.85(555)	30.31(770)	11.81(300)	53.8(24.4)
	Only
		18K	(208/230V)	21.85 (555)	30.31 (770)	11.81 (300)	65.9 (29.9)
		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(31.3)
	Heat	9K	(208/230V)	21.85(555)	30.31(770)	11.81(300)	63(28.6)
	Pump	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)

30.66(779) W3

21.85(555)	H
0.47(12)
11.81(300) D

D2 13.07(322)

2.36(60) H1

H2 3.66(93)

		19.17(487)		W1
		30.31(770) W
	B2	0.98(25)		2.76(70) W
	3.54(90)		B1
D3				11.73(298)
11.26(286)					D1

	2.42(61.5)		A2
				Unit: inch(mm)
	.24(6)	0.47(12)		A1
0
R

Fig. 1 – Sizes 9K and 12K Heat Pump and Size 18K Cooling Only

5

DIMENSIONS − OUTDOOR (CONT)

	(554)	H
	21.81
	0.47 (1 2)
13.11	(333)
D

												(325)		D2
												12.80
											(6 0)
												H1
									2.36

12.24 (311)

D3

20.24 (514)		W1
31.50	(800)	2.76 (7 0)
W		W2

(1 06)	B2	2.43 (6 1.8)
4.17		B1

	(340)	D1
	13.39

3.37 (8 5.5)

R
0
.
7
9
	(R
	2
	0
		)

H2

0.87 (2 2)				)
			6
A1		.24	(R
	0
	R
2.43 (6 1.6)				Unit: inch(mm)
A2

Fig. 2 – Size 18K Heat Pump

6

DIMENSIONS − OUTDOOR (CONT)

Unit: inch (mm)

Fig. 3 – Size 24K

7

CLEARANCES

A

Air-inlet

E

D	B	C

Air-outlet

Fig. 4 – Outdoor Unit Clearance

Table 9—Clearances

UNIT	MINIMUM VALUE in. (mm)
A	24 (610)
B	24 (610)
C	24 (610)
D	4 (101)
E	4 (101)

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

9.8in (25cm) or more for proper airflow 24in (61cm) or more is recommended for service

9.8in (25cm) or more for proper airflow 24in (61cm) or more is recommended for service

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

118in (300cm) or more

59in (150cm)	24in (60cm)
or more on a	or more
multiple parallel
unit arrangement
24in (61cm) or more
on a single parallel
unit arrangement

Fig. 5 – Clearances for Multiple Units

8

ELECTRICAL DATA

Table 10—Electrical Data (Cooling Only)

		Outdoor Unit Size	12K	12K	18K	24K
	Cooling Only	Volts-PH-Hz	(115V)	(208/230V)	(208/230V)	(208/230V)
		Max – Min*	127-104	253-187	253-187	253-187
		Oper. Voltage
	Power Supply	MCA	13	11	15	18
		MOCP	20	15	20	25
	Compressor	RLA	9.5	6.8	9	12
		FLA	0.6	0.5	0.6	0.6
	Outdoor Fan Motor	Rated HP	0.054	0.054	0.054	0.068
		Output	40	40	40	50

Table 11—Electrical Data (Heat Pump)

		Outdoor Unit Size	12K	9K	12K	18K	24K
	Heat Pump	Volts-PH-Hz	(115V)	(208/230V)	(208/230V)	(208/230V)	(208/230V)
		Max – Min*	127-104	253-187	253-187	253-187	253-187
		Oper. Voltage
	Power Supply	MCA	13	8	10	15	18
		MOCP	20	15	15	20	25
	Compressor	RLA	10.5	5.5	6.8	10.5	12
		FLA	0.6	0.4	0.4	0.5	0.6
	Outdoor Fan Motor	Rated HP	0.054	0.054	0.054	0.054	0.068
		Output	40	40	40	40	50

*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

WIRING

All wires must be sized per NEC (National Electrical Code) or CEC (Canadian Electrical Code) and local codes. Use Electrical Data table MCA (minimum circuit amps) and MOCP (maximum over current protection) to correctly size the wires and the disconnect fuse or breakers respectively.

Recommended Connection Method for Power and Communication Wiring:

The main power is supplied to the outdoor unit. The field supplied 14/3 stranded wire with ground with a 600 volt insulation rating, power/communication wiring from the outdoor unit to indoor unit consists of four (4) wires and provides the power for the indoor unit. Two wires are line voltage AC power, one is communication wiring (S) and the other is a ground wire. Wiring between indoor and outdoor unit is polarity sensitive. The use of BX wire is NOT recommended.

If installed in a high Electromagnetic field (EMF) area and communication issues exists, a 14/2 stranded shielded wire can be used to replace L2/N and (S) between outdoor unit and indoor unit landing the shield onto ground in the outdoor unit only.

!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.

SBe sure to comply with local codes while running wire from the indoor unit to the outdoor unit.

SEvery wire must be connected firmly. Loose wiring may cause the terminal to overheat or result in unit malfunction. A fire hazard may also exist. Ensure all wiring is tightly connected.

SNo wire should touch the refrigerant tubing, compressor or any moving parts.

SDisconnecting means must be provided and shall be located within sight and readily accessible from the air conditioner.

SConnecting cable with conduit shall be routed through the hole in the conduit panel.

9

CONNECTION DIAGRAMS

						115-1-60
			CONNECTING CABLE			FIELD POWER SUPPLY
			OUTDOOR TO INDOOR
				L	N	GND		N
L	N	S	GND			S	L
				Power to		Indoor	Main
Indoor Unit		Indoor
			Ground	Indoor Unit Signal			Power Supply
Power Supply Signal				115-1-60		High	115-1-60
115-1-60		High				Voltage
		Voltage

						208/230-1-60
			CONNECTING CABLE			FIELD POWER SUPPLY
			OUTDOOR TO INDOOR
							GND
L1	L2	S	GND	L1	L2	S	L1	L2
				Power	to	Indoor	Main
Indoor Unit		Indoor	Ground	Indoor Unit Signal			Power Supply
Power Supply Signal						High
		High
				208/230-1-60 Voltage 208/230-1-60
208/230-1-60 Voltage

115V Indoor Unit

115V Outdoor Unit

230V Indoor Unit

230V Outdoor Unit

Fig. 6 – Connection Diagrams

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.

10

WIRING DIAGRAMS (COOLING ONLY)

Fig. 7 – Wiring Diagram Size − Cooling Only Size 12K (115V)

11

WIRING DIAGRAMS (COOLING ONLY (CONTINUED))

Fig. 8 – Wiring Diagram Cooling Only Size 12K (230V)

12

WIRING DIAGRAMS (COOLING ONLY (CONTINUED))

Fig. 9 – Wiring Diagram Cooling Only Sizes 18−24K

13

WIRING DIAGRAMS (HEAT PUMP)

Fig. 10 – Wiring Diagram Heat Pump Size 12K (115V)

14

WIRING DIAGRAMS (HEAT PUMP (CONTINUED))

Fig. 11 – Wiring Diagram Heat Pump Sizes 09, 12, 18 (230V)

15

WIRING DIAGRAMS (HEAT PUMP (CONTINUED))

Fig. 12 – Wiring Diagram Heat Pump Size 24 (230V)

16

REFRIGERATION CYCLE DIAGRAMS

INDOOR		OUTDOOR
	LIQUID SIDE	CHECK VALVE
		(Heating Model only)
	2−WAY VALVE
		CAPILIARY TUBE
HEAT		HEAT
EXCHANGE		EXCHANGE
(EVAPORATOR)	T1 Room temp.	(CONDENSER)
	sensor

T2 Evaporator

temp. sensor

GAS SIDE 4−WAY VALVE

3−WAY VALVE

ACCUMULATOR

COOLING

COMPRESSOR

HEATING

Fig. 13 – Heat Pumps

17

REFRIGERANT LINES

General Refrigerant Line Sizing

1The 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.

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

3Refrigerant 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 12 lists the maximum lengths allowed.

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.

Table 12—Piping and Refrigerant Information

	System Size		12K (115V)	9K (208-230V)	12K (208-230V)	18K (208-230V)	24K (208-230V)
	Min. Piping Length	ft. (m)	10(3)	10(3)	10(3)	10(3)	10(3)
	Standard Piping Length	ft. (m)	25(7.5)	25(7.5)	25(7.5)	25(7.5)	25(7.5)
	Max. outdoor-indoor
	height difference	ft. (m)	33(10)	33(10)	33(10)	66(20)	66(20)
	(OU higher than IU)
	Max. outdoor-indoor
	height difference	ft. (m)	33(10)	33(10)	33(10)	66(20)	66(20)
	(IU higher than OU)
	Max. Piping Length with
	no additional refrigerant	ft. (m)	25(7.5)	25(7.5)	25(7.5)	25(7.5)	25(7.5)
	charge per System
Piping	(Standard Piping length)
	Total Max. Piping	ft. (m)	82(25)	82(25)	82(25)	98(30)	164(50)
	Length per system
	Additional refrigerant
	charge (between Standard	Oz/ft (g/m)	0.161(15)	0.161(15)	0.161(15)	0.161(15)	0.322(30)
	– Max piping length)
	Suction Pipe	In (mm)	1/2(12.7)	3/8(9.52)	1/2(12.7)	1/2(12.7)	5/8(15.9)
	(size - connection type)
	Liquid Pipe	In (mm)	1/4(6.35)	1/4(6.35)	1/4(6.35)	1/4(6.35)	3/8(9.52)
	(size - connection type)
	Refrigerant Type	Type	R410A	R410A	R410A	R410A	R410A
	Cooling Only Models	Lbs (kg)	1.30(0.59)	N/A	1.17 (0.53)	1.98 (0.9)	2.56 (1.16)
	Charge Amount
Refrigerant
	Heat Pump Models
		Lbs (kg)	2.12(0.96)	1.76(0.8)	2.12(0.96)	2.82 (1.28)	3.97 (1.8)
	Charge Amount

Long Line Applications,:

1No change in line sizing is required.

2Add refrigerant per Table 12.

18

SYSTEM EVACUATION AND CHARGING

!CAUTION

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

1Completely tighten all flare nuts and connect manifold gage charge hose to a charge port of the low side service valve (see Fig. 14).

2Connect the charge hose to the vacuum pump.

3Fully open the low side of manifold gage (see Fig. 15).

4Start the vacuum pump

5Evacuate using the triple evacuation method.

6After evacuation is complete, fully close the low side of manifold gage and stop the vacuum pump operation.

7The 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.

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

9Fully open service valves B and A.

10Securely tighten the service valves caps.

Outdoor Unit	Refrigerant	Indoor Unit
A	Low Side	C
B	High Side	D
Service Valve
Fig. 14 – Service Valve
Manifold Gage
500 microns
Low side valve	High side valve
Charge hose	Charge hose

Vacuum pump

Low side valve

Fig. 15 – Manifold

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. 16).

5000
4500
4000						LEAK IN
3500
						SYSTEM
3000
2500
MICRONS2000						VACUUM TIGHT
1500
						TOO WET
1000
						TIGHT
500
						DRY SYSTEM
0	1	2	3	4	5	6	7
			MINUTES

Fig. 16 – Deep Vacuum Graph

Triple Evacuation Method

The triple evacuation method should be used. Refer to Fig. 17 and proceed as follows:

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

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

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

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

5Pump the system down to 1000 microns.

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

7Pump the system down to 500 microns.

8Perform 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. 17 – 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.

19

Operation Modes and Functions

FAN Mode

1Outdoor fan and compressor stop

2Temperature setting function is disabled, and no setting temperature is displayed.

3Indoor fan can be set to high/med/low/auto

4The louver operates the same in the COOLING mode.

5Auto fan

Fig. 18 – Auto Fan

COOLING Mode

Compressor Running Rules:

SWhen T1*Ts < 28.4_F(*2_C), the compressor stops.

SWhen T1*TS > 31.1_F(*0.5_C), the compressor activates.

SWhen the AC runs in the mute mode, the compressor runs with low frequency.

SWhen 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. 19 – Outdoor Fan Running Rules

The auto fan adheres to the following rules.

Fig. 20 – Auto Fan

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>− T, the compressor stops, when T1−TS< T−1.5 the compressor will be on. T 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. 22 – Outdoor Fan Running Rules

20

Auto Fan Action in HEATING Mode

T1

a

b

c d e

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 appears.

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_C.

−−−−T3 keeps to be higher than TCDE2_C for 80 seconds.

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

Evaporator Coil Temperature Protection

T2

Off

TEstop

Decrease

TEdown

Hold

TEH2

Resume

Fig. 24 – Evaporator Coil Temperature Protection

NOTE: The following applies to Fig. 24:

SOff: Compressor stops

SDecrease: Decrease the running frequency to the lower level

SHold: Keep the current frequency

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

In the AUTO mode, the machine chooses the COOLING, HEATING or FAN−ONLY mode according to T ( T =T1−Ts).

Table 13—Auto Mode

ΔT=T1-Ts	Running mode
ΔT 2_C	Cooling
-2≤ΔT≤2_C	Fan-only
ΔT<-2_C	Heating

The indoor fan runs under auto fan in the relevant mode. The louver operates the same in the relevant mode. If the machine switches modes 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 (10_C), the compressor stops and does not resume until the room temperature exceeds 53.6_F (12_C).

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

SEnter 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:

SForced 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_F (24_C) setting temperature.

SForced Auto Mode: The forced auto mode is the same as the normal auto mode with a 75.2_F (24_C) setting temperature.

AUTO−RESTART Function

The indoor unit is equipped with the AUTO−RESTART function, which is carried out through an auto−restart module. In the event of a sudden power failure, the module memorizes the setting conditions prior to the power failure. The unit resumes the previous operation setting (not including the SWING function) automatically three (3) minutes after the power returns.

If the memorization condition is the FORCED COOLING mode, the unit will run in the COOLING mode for 30 minutes and turn to the AUTO mode at the 75.2_F(24_C) setting temperature.

If the air conditioner is off before the power turns off and the air conditioner is required to start up, the compressor delays start up for 1 minute before powering on. In other instances, the compressor waits three (3) minutes before restarts.

Refrigerant 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.

46_F (8_C) Heating

When the compressor is running, the indoor fan motor runs without the ANTI−COLD air function. When the compressor is off, the indoor fan motor is off.

21

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 14).

Table 14—Information Enquiry

ENQUIRY INFORMATION	DISPLAYING CODE	MEANING
T1	T1	T1 temp.
T2	T2	T2 temp.
T3	T3	T3 temp.
T4	T4	T4 temp.
T2B	Tb	T2B temp.
TP	TP	TP temp.
TH	TH	TH temp.
Targeted Frequency	FT	Targeted Frequency
Actual Frequency	Fr	Actual Frequency
Indoor Fan Speed	IF	Indoor fan speed
Outdoor Fan Speed	OF	Outdoor fan speed
EXV Opening Angle	LA	EXV opening angle
Compressor continuous running time	CT	Compressor continuous running time
Compressor stop causes	ST	Compressor stop causes
Reserve	A0
Reserve	A1
Reserve	b0
Reserve	b1
Reserve	b2
Reserve	b3
Reserve	b4
Reserve	b5
Reserve	b6
Reserve	dL
Reserve	Ac
Reserve	Uo
Reserve	Td

When the air conditioner enters the information enquiry status, it displays the code value for 25 seconds (see Table 15).

Table 15—Information Enquiry

	ENQUIRY	DISPLAY VALUE	MEANING	REMARK
	INFORMATION
		-1F,-1E,-1d,-1c,	-25,-24,-23,-22,-21,-20
		-1b,-1A
				1. The displaying temperature is the actual value.
		-19—99	-19—99	_
	T1,T2,T3,T4,			2. The temperature is C no matter what kind of remote
		A0,A1,…A9	100,101,…109	controller is used.
	T2B,TP,TH,
	Targeted	b0,b1,…b9	110,111,…119	3. T1,T2,T3,T4,T2B display range:-25~70, TP display
	Frequency,			range:-20~130.
		c0,c1,…c9	120,121,…129
	Actual			4. Frequency display range: 0~159HZ.
	Frequency	d0,d1,…d9	130,131,…139	5. If the actual value exceeds the range, it displays the
		E0,E1,…E9	140,141,…149	maximum value or minimum value.
		F0,F1,…F9	150,151,…159
		0	OFF
		1,2,3,4	Low speed, Medium speed, High	For some big capacity motors.
	Indoor fan speed		speed, Turbo
	/Outdoor fan speed		Actual fan speed = Display value	For some small capacity motors, the display value is from 14-FF
		14-FF	turns to decimal value and then	(hexadecimal), the corresponding fan speed range
			multiply 10. The unit is RPM.	is from 200-2550 RPM.
			Actual EXV opening value =
	EXV opening angle	0-FF	Display value turns to decimal
			value and then multiply 2.
	Compressor			If the actual value exceeds the range, it displays the
	continuous running	0-FF	0-255 minutes
				maximum value or minimum value.
	time
	Compressor stop	0-99	For the detailed meaning, please	Decimal display
	causes		consult with engineer
	Reserve	0-FF

22

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 100Ω 40W) or a soldering iron (plug) between the +, − terminals of the 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.

23