Haier YR-H 71, YR-H65, YR-H50, YR-E06, YR-E12 Service Manual

SERVICE MANUAL

-

Controller and Accessory

Infrared controller :

YR-H71..........Page 1

YR-H65..........Page 12

YR-H50..........Page 13

YR-H49..........Page 13

Address set controller:

ASC-002........Page 14

Wired controller:

YR-E06..........Page 15

YR-E12..........Page 24

Central controller:

YCZ-A001......Page 29

ICR01.............Page 34

Weekly timer:

YCS-A001......Page 40

Detector:

YCJ-001.........Page 46

IGU04.............Page 57

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The first site of dip switch in YR-E06 is used to distinguish diferent types, ON:H MRV or
Fixed frequence types, OFF:Single split inverter. Their diagnostic codes are different.

ON

OFF

Normal state

-- --

Indoor ambient temp. sensor error

E1

F1

Indoor pipe temp. sensor error

E2

F2

Indoor pipe is over-heat in heating mode

F4 F4

Indoor pipe is in anti-freezing function in cooling

F5 F5

Communication error between indoor and outdoor units

E9 E3

Communication error between indoor and wired controller

E8

F7

Outdoor power model error

E0 E1

Outdoor current is too low

F2

E2

Compressor is over-heat

F6

E4
CT current is over high/one phase of power line is lost E5 E5
Outdoor ambient temp. sensor error

E3 E6

Outdoor pipe temp. sensor 1 error

E4 E7

The voltage is over-high or over-low

E7

E10

Outdoor high or low pressure error

E6

E13

Outdoor pipe temp. sensor 2 error

E15 E15

The indoor pipe sensor temp. is too high

E12 E12

Outdoor pipe temp. sensor 3 error

E14 E14

Outdoor suction temp. sensor error

E13 E11

Compressor temp. sensor error

F7

E9
Indoor mid-evaporator temp. sensor error F3 F3
Indoor PCB error

F8

E8
Water outlet system problem

E0

F6
Power lines is in wrong connection turn or one phase is lost

E10

F0
Humidity sensor error

E11

F8

Error Discription

SW1-1

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678

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z 28 z

Failure description

Room temp. sensor abnormal
Indoor coil temp. sensor abnormal

Outdoor coil temp. sensor abnormal
Over-current malfunction

Communication malfunction between indoor and wired controller
Communication malfunction between indoor and outdoor abnormal

Coil gas pipe temp. Sensor abnormal

Code on wired controller
01
02
4A
49
48
53

07
06

03

Outdoor temp. sensor abnormal

High / Low pressure abnormal

Temperature protection malfunction

0D

Drainage system malfunction

08

Indoor EEPROM abnormal

N/A

0B

05

4. Diagnostic code display

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1
2
3
4
5
6

7
8

9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24

25
26

27
28
29
30
31

Failure diagnosis

Upon abnormal operation:

Please read the

User s Manual

attached with the indoor unit before asking for
repairing. You may contact the after-sales technicians after careful checkup.
When faults arise, the symbol

appears along with the error code.

The central controller faults corresponding to error codes are given in the
following list (including air conditioner faults and group control network faults):

Code

Meaning

None (normal operation)
Fault with indoor ambient temperature sensor
Fault with indoor tube temperature sensor
Indoor heating overload protection
Indoor cooling icing (overload) protection

Indoor & outdoor communication error

Communication fault between panel (wire controller) and indoor unit
(air conditioner indication, central controller shows 30)

Module fault (PFC protection

DC)
No load
Compressor overheating
Abnormal CT current
Fault with outdoor ambient temperature sensor
Fault with outdoor heat exchanger (tube temperature) sensor
Protection of supply overvoltage or undervoltage

High voltage protection

--- Fault with outdoor evaporator sensor

--- Cooling overload
EEPROM fault
Fault with outdoor return gas sensor
Fault with compressor sensor

--- Fault with indoor evaporator sensor
Drain system failure
Power supply 3-phase fault (phase lack or mistake)
Humidity sensor malfunction

Indoor fan failure (fan overcurernt, fan IPM protection, fan Holtz
element fault)

Blank

Low voltage protection

--- Electronic expansion valve failure

--- Dust remover screen needs cleaning
Insufficient refrigerant
Abnormal communication between monitor and air conditioner
Abnormal communication between monitor and bus

Outdoor fan failure (fan overcurernt, fan IPM protection, fan Holtz
element fault)

Commercial Air Conditioner

Function description:

1.9 Central Controller ICR01 0010451974A

ICR01 central controller is developed from YCZ-A001, the operation and dimension is same with
YCZ-A001, please refer YCZ-A001 part, ICR01 is used for X Multi, MRVII(R22, R410A) series, YCZ­A001 is used for Unitary Free, Unitary smart and Free Multi seires. But the wiring installation is
completely different.

1.9.1 Appearance

Figure 1

Total on/Total off

1
17
33
49

2
18
34
50

3
19
35
51

4
20
36
52

5
21
37
53

6
22
38
54

7
23
39
55

8
24
40
56

9
25
41
57

10
26
42
58

11
27
43
59

12
28
44
60

13
29
45
61

14
30
46
62

15
31
47
63

16
32
48
64

MONITOR
SET

MODE
FAN
COOL
DRY
HEAT
AUTO

1
2

GROUP
TOTAL

UNIT

RUN
STOP

CENTRAL
LOCK

SLAVE
TIMER

STANDBY
FILTER

FAN
SPEED
AUTO
HIGH
MID
LOW

SET

FAILURE CHECK

RECOVERY

SWING

AUTO NORMAL HRV

TEMP.

MONITOR

SET

TOTAL

GROUP

MODE

FAN

SPEED

TIMER

RECOVERY

CHECK

FILTER

CONFIRM

GROUP SET

CENTRAL

LOCK

SELECT

1.9.2 LCD icons introduction
LCD of central controller displays indoor state and setting mode of different units.

1
17
33
49

2
18
34
50

3
19
35
51

4
20
36
52

5
21
37
53

6
22
38
54

7
23
39
55

8
24
40
56

9
25
41
57

10
26
42
58

11
27
43
59

12
28
44
60

13
29
45
61

14
30
46
62

15
31
47
63

16
32
48
64

MONITOR
SET

MODE
FAN
COOL
DRY
HEAT
AUTO

1
2

GROUP
TOTAL

UNIT

RUN
STOP

CENTRAL
LOCK

SLAVE
TIMER

STANDBY
FILTER

FAN
SPEED
AUTO
HIGH
MID
LOW

SET

FAILURE CHECK

RECOVERY

SWING

AUTO NORMAL HRV

central controller state indication

temp. setting and
failure indication

indoor group and

unit number indication

indoor state
indication

indoor unit number indication

Figure 2: LCD diagram of central controller

z 35 z

Important! Timer and Recovery buttons are not in use.

Commercial Air Conditioner

1.9.3. Installation drawing

L

N

(1PH, 220V AC power source)

0010451974A

ICR01

Central controller

Figure 3. back of central controller

1.9.5. Communication wire specs
The wire between connecting board to the central controller is the dual-core STP (shielded twisted pair).
The detailed specs are as below:

wire length(m)

<

100

100 and <200
200 and <300
300 and <400
400 and <600

Specs

0.3mm

2 * 2-core STP

0.5mm

2 * 2-core STP

0.75mm

2 * 2-core STP

1.25mm

2 * 2-core STP

2mm

2 * 2-core STP

Shielded layer of communication wire must be earthed on one end.

Dip switch setting meaning:
The first bit: central bux line selection, 0: indoor bus line(Install without IGU04); 1: central bus line
The second bit: master/slave central controller selection, 0: master central controller; 1: slave central
controller
The third, fourth bit: control range, 00: 1~64, 01: 65~128, 10: 129~192, 11: 193~256. Every central
controller only can control 64 units, and every unit can include max. 16 indoors, but the central controller
only displays the master indoor state.

O N

1 2 3 4

1.9.6. Dip switch setting of central controller: shown in the below figure (ON:0, OFF: 1)

Figure 4: Exterior dimension

(mm)

65

49

70

180

121

92

136

7086

R

1.9.4. Exterior dimensions for central controller

1
17
33
49

2
18
34
50

3
19
35
51

4
20
36
52

5
21
37
53

6
22
38
54

7
23
39
55

8
24
40
56

9
25
41
57

10
26
42
58

11
27
43
59

12
28
44
60

13
29
45
61

14
30
46
62

15
31
47
63

16
32
48
64

MONITOR
SET

MODE
FAN
COOL
DRY
HEAT
AUTO

1
2

GROUP
TOTAL

UNIT

RUN
STOP

CENTRAL
LOCK

SLAVE
TIMER

STANDBY
FILTER

FAN
SPEED
AUTO
HIGH
MID
LOW

SET

FAILURECHECK

RECOVERY

SWING

AUTO NORMAL HRV

z 36 z

Commercial Air Conditioner

00: 1~64 01: 65~128
10: 129~192 11: 193~256

position 1

0: ON
1: OFF

indoor bus line
central bus line

2

master controller
slave controller

3 4

For example:
Select central bus line, master central controller, control range is 00, so the dip switch is 1 0 0 0 (default)
Select indoor bus line, master central controller, control range is 00, so the dip switch is 0 0 0 0.

1.9.7. Can set the central control unit as a group, and the max. 64 units of indoor can be set a group.
After setting unit, the indoor in one group can be controlled the same operation (when out of factory, one
unit is regarded as one group).

central controller

connecting board

IGU04

Indoor 1

Indoor 2

Indoor 3

Indoor 1 Indoor 2

Indoor 3

Figure 5 Central unit and group diagram

YR-E12

YR-E12

YR-E12

Unit 1 Unit 2

Unit 3

1.9.8. Control function

1. Features and functions of central controller

Central controller control(ICR01) diagram is as below:

Figure 6 MRV II central control system diagram

connecting board ...

IGU04

outdoor

central controller

ICR01

connecting board5

IGU04

connecting board 1

IGU04

outdoor

outdoor

unit 1

unit 2

wired controller

wired controller

wired controller

max. 16 indoors

unit 64 (max. 64 units)

unit 3

Infrared controller

YR-E12

YR-E12

YR-H71

YR-H71

B-A
B-B

P,Q

P,Q

P,Q

1.9.9.Summarization
For installation, connect communication wires from central controller ICR01 port B-A,B-A, to connecting board IGU04. and then connect
communication wires from IGU04 P,Q to outdoor or indoor unit communication port P,Q. Notice, the default position of ICR01 dip switch
is 1 0 0 0, the address of IGU04 and the indoor address must be set in different number.
When one central controller control one air condition system, also can directly connect wires from ICR01 B-A,B-B port to P, Q port of
outdoor or indoor communication port.

z 37 z

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P

ress [check] button, ICR01 will show the diagnostic code, when unit * is in error, and choose the number in
ICR01, you will see the diagnostic code, and if not select the error units, the error units number will be
flashing.
Diagnostic code for outdoor m

aster unit

20

Outdoor defrost temp. sensor TE error

21

Outdoor ambient temp. Sensor TA error

22

Outdoor suction temp. sensor TS error

24

Outdoor oil temp. sensor Toil

error

The temp. tested from sensor is keeping lower than

-

60.87

or higher than 135.4

for 60 seconds, and

system will automatically change to backup running mode.

23

Outdoor discharge temp. Sensor TD

error

The temp. tested from sensor is keeping lower than

-4.45

or higher than

337.14

for 60 seconds, and

system will automatically change to backup running mode.

25

Master compressor current is over high Signal comes from MCU 840

26

Commun

ication error between indoor

and outdoor unit

Outdoor didn¯t fi nd any i ndoor uni

27

Compressor oil temp. is over-high

Oil temp. is keep higher than 90

for 5 minutes, when the
temp. is lower than 75 , the alarm will be disappeared
automatically.

28

Mast

er unit high pressure sensor error

29

Master unit low pressure sensor error

The signal voltage is higher than 4.9V, or lower than 0.1V
for 30 seconds

30

High pressure switch alarms for
over-high pressure

31

Low pressure switch alarms for
over-high pressure or over-low pressure

The switch keep open for 1 minute, alarm, if switch keep
short

-connecting for over 1 minute, the alarm will be gone

automatically

32

Inverter IPM problem

S

ignal comes from MCU 840

33

Master unit PCB

MB89F538 EEPROM

error

EEPROM

data is lost or is installed in wrong way.

34

Outdoor compressor discharge temp.
sensor alarms

Discharge temp. sensor

TD1

temperature is higher than

1

25

for 10 seconds

when lower than 1

00

, resume

35

The protection part in inverter
compressor is acted

Check the part in compressor.

37

Master

unit

high/

low

pressure sensor is

installed in wrong

turn

In the first 3 minutes of compressor running, Pd/Ps<1 for

over 60 seconds

39

Master unit low pressure sensor alarms

Cooling: Ps<

0.2kgG/cm

2

for 30 seconds, alarm

Heating: Ps

<-

0.2kgG/cm2 for over 10 minutes, alarm.

40

High pressure sensor alarms

Pd>28

.5kgG/cm2 for over 30 seconds

41

Suction temp. sensor TS alarm

TS>40 for over 10 minutes

42

Current over-high

Signal is higher than setting Max. current for 5 seconds

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43

Master discharge temp. sensor alarm in

low frequence

When inverter compressor frequence is lower than

30Hz,

TD1 is higher than

110

44

Communication

error between master

unit

MB89F538

and MCU

807

(indoor)

No signal for over 4 minutes

45

Communication error between master
unit

MB89F538

and MCU

807 (indoor)

MB89F538

and

807

central controller

No signal from indoor unit or central controller for over 4
seconds

46

Communication error between master
unit connecting board and inverter PCB

No signal for over 2 minutes

49

Master inverter drive PCB EEPROM
error

EEPROM

data is lost or installed in wrong way.

50

The total capacity of indoor units is too
high

Total capacity of indoor units>outdoor capacity x

135%

51

Outdoor

communication signal

is lost

52

Indoor units is over than 64 sets

53

C

entral control address repeat

Check the address of all indoor units

54

Master unit oil temp. is over-low

In running, the temp. of compressor oil is lower than

(

ps+10

for 5 minutes

69

Slave unit is lost

Communication of slave unit error or switched off

70

Shortage of refrigeration

Only show diagnostic code, doesn t stop units

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z 45 z

1.11 Detector YCJ-A001

Safety Precautions

Below are four kinds of safety precautions and suggestions:
WARNING: Improper use may result in severe consequences of death or serious injures.

CAUTION: Improper use may result in injures or machine damages; in some cases may

cause serious consequences

: It must be strictly prohibited where marked with “Prohibited”, otherwise may

result in machine damages or endanger the user’ personal safety.

: It must be strictly followed where marked with “To be followed”, otherwise

may result in machine damages or endanger the user’ personal safety.

Instructions: This information can ensure correct operation of the machine.

Be sure to follow the following important safety precautions.
These precautions should be at hand to be checked at any time when needed.
If air conditioner is transferred to a new user, this manual should be as well transferred
to the new user.

CAUTIONS

 Not be allowed to spray flammable spraying agent directly to controller.

Otherwise may result in fire.

 Not be allowed to operate switch with damp hands, and not to spray

controller with water.
Otherwise may result in electric shock.

 Not be allowed to press switch with matter having sharp tip.

Otherwise may result in malfunction or electric shock.

WARNING

 Entrusting Installation

Installation should be entrusted to after
service staff; self-installation may result
in electric shock, fire and the similar
because of improper installation.

If any abnormal phenomena are found
(e.g. smell of burning), please stop
running and cut off power supply, and
contact after service staff to find out
treatment method.

If keep using under this
situation, may result in
accident of electric and
fire.

 When intend to move and reset controller,

ask after service staff for responsibility.
Improper installation may result in electric
shock and fire.

 Absolutely not to alter without

authorization.
Improper alteration may result in accident o

f

electric shock, fire and the similar.

 When repair needed, ask after service staff

to handle it.
Improper maintenance and repair may resul

t

in electric shock and fire.

Maintenance

 When maintenance or abnormity appeared, be sure to cut off manual operation power.
 It will cause color change or paint-fading if wipe appearance of operation

portion with gasoline, thinner or chemical wiping cloth; be careful.

If operation portion is heavily soiled, shall immerse cloth in diluted neutral
detergent, and wipe that portion after wring the cloth, and wipe clean ly with
dry cloth.

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z 46 z

Abstract of Function

Remote control detector (heveunder as: detector) is the necessary part and user’s optional part of Haier
commercial air conditioner remote monitor and control system. Net air conditioner (heveunder as: air
conditioner or remote) means a air conditioner with remote control interface on indoor computer board,
onlu which could combine with parts such as detector and central controller to form remote or detector
interface monitor and control system.

Detector is a key part of Haier commercial air conditioner remote monitor and control system, used for
transferring standard digital interface to realize communication between bus code and sub-address. It is
connected directly to air conditioner to realize local operation and collection of control information and
working information of air conditioner. Together with air conditioner central controller (hereunder as:
central controller) and air conditioner, form the Haier commercial air conditioner remote monitor and
control system — group control function network to realize data exchange and monitoring. Abstract
description as follows:

A. Communication Function

1. Communication with air conditioner
Perform wire communication with at most two air conditioners through 4-poles screw-fixi ng te r minal,
and can realize two-unit switchover function when connected to two air conditioners, which control
operation status of air conditioner by different ways according to inner control or inquiry demand of
detector, and check working information and malfunction information of air conditioner at the same
time.

2. Communication with central controller (another optional accessory, a control component of Haier
commercial air conditioner remote monitor and control system)

Realize communication with central controller through RS-485 interface bus. According to the
components number set by internal dialing switch, receive commands from central controller, for m
internal control or enquiry request of detector and answer reception status and working information
and malfunction information of air conditioner.

B. Power Failure Resume

To reduce the impaction to power network when air conditioners simultaneously start, detector have
power blackout compensation function to replace the power blackout compensation function of local
air conditioner when use group control net; When power restored after blackout, air conditioner can
automatically restart with different delay according to basic running status before power blackout.

C. Two-unit Switchover Function

To increase operation reliability of air conditioner, detector is equipped with two-unit switchover
function, and the internal dialing switch of detector set single-unit operation mode or two-unit
switchover mode. When select single unit mode, detector controls unit A according to commands
from previous unit. When select two-unit mode, unit A and unit B have absolutely equal position in
realizing two-unit switchover function.

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z 47 z

Abstract of Function

Realization of two-unit switchover function: in normal operation status, one air conditioner is started
to operate under the control of detector and another one stops to wait, when it’s time for switchover
the detector wakens the waiting air conditioner and recalculates time, and the previous running one
will continue to operate and automatically stops to wait half hour later. If any of air conditioner fails
to function, switchover timing is temporally stopped, the detector is automatically controlled to waken
another air conditioner and after that stop the malfunction one to wait status. The detector will
forward transfer the malfunction information when inquiring and automatically restore two-unit
switchover function after malfunction is removed. If air conditioner cannot reach the setting
temperature after a period of running, that is over-load, switchover timing will be temporally stopped,
the detector is automatically controlled to waken another air conditioner and two units operate
together until the setting temperature is obtained, now automatically stop the latter started conditioner
and restore two-unit switchover function automatically.

D. Unit Number Setting Function

There is a 8-bit dialing switch inside the detector, the highest order is D8 used for setting single unit
operation mode or two-unit switchover operation mode; lower seven bits (D7, D6, D5, D4, D3, D2
and D1) are used for setting unit number (group control network) or two-unit switchover time
(two-unit switchover).

E. Working Status Display Function

Detector indicators are divided into power indicator (red LED) and operation indicator (green LED):
the operation indicator has the function of displaying operation status, and the power indicator lights if
power is normal after power on; lit operation indicator means that detector works normally, and
flashed operation indicator shows operation status of detector and distinguishes the meaning of
different status by flashing times.

F. Time Delay Control Function

When forming central control network through RS-485 bus, detector sets start delay function to
reduce impaction to power network because of simultaneous control and operation of air conditioners,
and delay time is created by detector randomly and automatically.

G. Detector can only be used for some of Haier Commercail indoor type , for example: Free Multi Wall

mounted type, Console type etc. Detector is necessary for Weekly timer or central controller
installation for this types. But Duct type, Cassette type, Convertible type couldn’t use detector., they
can directly be connected with weekly timer or central controller.

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z 48 z

Introduction of System

1. Only use two-unit switchover function
Detector is connected to two air conditioners with same type through a 4-poles screw-fixing terminal
at the interface of air conditioner, and correspondingly set dialing switch of the detector as two-unit
switchover operation mode. When only use two-unit switchover function, system do not need to
connect other parts. Two-unit switchover time can be set within the range of 1-127 hours by the low 7
bits of dialing switch, see dialing switch setting table for detail settings and corresponding times.

2. Use central controller to realize group control function
Please reference “Central controller YCZ-A001 manual” and “Weekly timer YCS-A001 manual”.

3. Use central controller to realize two-unit switchover group control function
Please reference “Central controller YCZ-A001 manual” and “Weekly timer YCS-A001 manual”.

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z 49 z

Maintenance

Status Inspection

 Control unit A when select single unit, and when unit A fails to function, detector will forward transfer

malfunction information during inquiry. Control unit A and B when select two units, as long as one air
conditioner fails to function, detector will forward transfer malfunction information during inquiry.

 Display of detector running status and operation indicator: 0.5 second ON and 0.5 second OFF of

operation indicator is a cycle, and indicate information using times of the cycle, which form status
indication, and an interval of 2 seconds between status indication and status indication. Detector puts
all detected status together to form a status indication cycle, and an interval of 4 seconds between
status indication and status indication. For example: under two-unit status, there is an air conditioner
interface communication error, then indication 2 + 2 seconds waiting + indication 3 + 4 seconds
waiting and recycles like this.

Serial

No.

Flashing

times

Meaning

1 1 Communication error with previous unit interface RS-485
2 2 Communication error with previous unit interface RS-232C
3 3 Communication error with interface of air conditioner A

4 4

Communication error with interface of air conditioner B (do not check this
interface under single unit status

5 5 Data error of detector’s EEPROM
6 6 Data collection of air conditioner cannot inquiry and confirms error.
7 7 Control commands from previous unit cannot be performed.

Be sure to cut off manually controlled power supply switch when maintenance.

 Wipe with a soft dry cloth. If too dirty, immerse cloth in diluted neutral detergent and wipe after wring

the cloth, and clean with dry cloth.

 Forbid to wipe with gasoline, thinner, household cleanser or chemical wiping cloth, otherwise may

result in color change, paint-fading, deformation or break.

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Appearance, Dimension and Interface

1------------ Reset Port
2------------ Signal Ground Wire of Unit B
3------------ Signal Line of Unit B
4------------ Signal Ground Wire of Unit A
5------------ Signal Line of Unit A
6------------ Central Control Interface — B
7------------ Central Control Interface — A
8------------ Communication Line for RS-232 Linking Control Computer or Communication Line

of MODEM (We only offer agreement of deteetor for programming control software )

9------------ Power Cord. If damaged, to avoid dangers, the power cord must be replaced by

manufacturer or its maintenance department or similar professional staff.

Performance Parameters and Accessories

Power Supply 1PH, 220~230VAC, 50Hz

Consumed Power 3W

The Maximum Dimension 139 × 142 × 55 mm

Weight 0.53 kg

Accessories

2 pieces of communication line to air conditioner
(UL2547, AWG24 2C) (Core: red/white)

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Installation and Debugging

Installation Methods

Fix detector by means of two screws hanging methods, and distance
between screws see (right figure).

1. Realiz ation, installation, wiring and power distribution of a system only
using two-unit switchover function are much more easier, after finishing
installation of two units, connect detector to the remote control interface
of the air conditioner computer board, set detector as two-unit switchover
working mode and set two-unit switchover time as required.

2. It must form a complete set of documents (project layout for group control network, installation and
construction records for group control network, debugging records for group control net, maintenance
and repair records for group control network) for group control network of Haier commercial air
conditioner long distance system (hereinafter for short as: group control network) from layout design,
installation, debugging to after service, and file all for future reference.

3. Layout design of group control net woek shall be finished in advance, including: (1) compositions of
group control network system and quantities controlled; (2) selection type of air conditioner,
installation place, power distribution and wiring manner and connection to detector; (3) installation
place of detector, allocation of unit address code, power distribution and wiring manner and
connection to group control bus; (4) installation and wiring of group control bus, length limitation of
bus, resistance matching of two ends of bus, and single point earth of bus shielding layer; (5)
installation place of central controller, allocation of unit address code, power distribution and wiring
manner.

4. Principles of layout design of group control net: (1) detector is essential part, to keep proper
responding speed and communication reliability, detector quantities carried by one central controller
shall not more than 64; (2) air conditioner must be a net air conditioner, installation must strictly
follow the installation and operation instructions shipped with the unit, and confirm that power
blackout compensation function of local air conditioner has been cancelled when debugging; (3)
suggest that do not use two-unit switchover function of detector in the case of high load, i.e. suggest
that do not use one detector to load two air conditioners when detector forming group control net,
otherwise temperature difference control may be affected. If it is necessary to install two-unit
switchover function for group control net, air conditioners with same type and half installation
distance of that of normal installation are required; (4) installation place of detector shall not too far
away from air conditioner, not exceed the wiring length; (5) unit address code of detector shall be
strictly allocated in a sequence from small one to big one, and set continuous unit number; (6) for
power distribution of detector, the power distribution line and communication line shall not be too
close from each other or in the same wiring channel, and no other special requirements; (7) for
connection between detector and group control bus, not allowed to connect branch line from the
group control bus; (8) shielding line of communication line between detector and air conditioner and
the shielding line of communication bus between detector and central controller shall be shorted; (9)
wiring and power distribution line of the group control bus shall not be too close from each other or
in the same wiring channel, and others may refer to wiring requirements of building autocontrol
system; (10) limit the total length of group control bus to 1000 meters; (11) at both ends between
Bus A and Bus B connect a metallic membrane precision resistance of 100 or 120 ohm respectively; if
needed (12) single point earth for bus shielding line, suggest to be arranged in the middle of
communication bus, close to central controller;

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Installation and Debugging

(13) in principle, installation place of central controller shall be arranged in the middle of
communication bus, close to shielding earth line of communication bus; (14) unit address codes of
central controller adopt the default settings; (15) central controller has its own power distribution line,
the power distribution line and communication line shall not be too close from each other or in the
same wiring channel, and no other special requirements.

5. Installation and construction of wiring of group control network shall be processed together with
installation and debugging of net air conditioner, pay attention to commissioning before installation.

6. Connection between detector and air conditioner: detector working mode and unit address code shall
be strictly set according to planned layout; detector makes wire communication with at most two air
conditioners (A, B) through 4-poles screw-fixing terminal at air conditioner interface (A

+, A-

, B+, B-);
connection between detector and air conditioner use uniform wiring; use uniform wiring for
connection between detector and air conditioner, one plug in type terminal of wiring connected to
Remote control interface on the computer board of air conditioner, and cores of another terminal
respectively connected to A

+

and A- (B+ and B-); connection has polarity, and generally white wire

connected to A

+/B+

and black/red wire connected to A-/B-; if detector cannot work normally when
debugging, then can check and remove malfunction by changing positive and negative polarity.
During debugging also can judge whether communication interface to air conditioner is normal
according to the running status indicated by operation indicator (green LED).

7. Connect detector and communication bus after finish the wiring of communication bus: connect
several detectors to communication bus in parallel, all terminal port A (including central controller)
on one bus, and all terminal port B (including central controller) on another bus, at both ends of the
communication bus - A terminal port line and B terminal port line shall paralleling connect a metal
membrane precision resistance of 100 or 120 ohm respectively if needed. Earth one point of the
shielding line of communication bus, which is at the middle position of the communication bus, and
the total length of communication bus shall be limited within 1000m.

8. Connect central controller and communication bus after finish installation and connection of detector:
central controller is connected to communication bus through the 2-post screw-fixing terminal (A and
B) of interface RS-485, locating in the middle of the communication bus, with position close to the
earth point of the shielding line of communication bus.

9. Power on and debugging: after power on, central controller periodically monitors the detector and air
conditioner groups on the communication bus, and after inquiring for a period of time the unit
number shall display as expected, check and debug if having any difference.

10. Set the dialing switch of detector: (1) there is a 8-bit (1～8) dialing switch inside the detector, OFF
means 0 and ON means 1; (2) the eighth bit used for setting single unit working mode or two-unit
switchover working mode, OFF means single unit and ON means two-unit; (3) the lower seven bits
(from the seventh to the first bit) have up to 128 selections when forming group control net, which are
used for setting unit address code, see the table below for detail setting check list; (4) the lower seven
bits have up to 128 selections when forming group control net and using two-unit switchover function,
which are used for setting unit address code, see the table below for detail setting check list, and the
default two-unit switchover time is 24hrs; (5) the lower seven bits have up to 128 selections when not
forming group control net, which are used for setting two-unit switchover time, see the table below
for detail setting check list.

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Installation and Debugging

Two
Unit

Dialing setting

（1 means dialing to ON，0 means dialing to OFF）

NO.8 NO.7 NO.6 NO.5 NO.4 NO.3 NO.2 NO.1

Low
7-bit

value

Air

conditioner

installation

sequence

Unit

number
of central
controller

Two-unit

switchover

time

* 0 0 0 0 0 0 0 0 1 1-1 No limit
* 0 0 0 0 0 0 1 1 2 1-2 1hr
* 0 0 0 0 0 1 0 2 3 1-3 2hrs
* 0 0 0 0 0 1 1 3 4 1-4 3hrs
* 0 0 0 0 1 0 0 4 5 1-5 4hrs

* 0 0 0 0 1 0 1 5 6 1-6 5hrs
* 0 0 0 0 1 1 0 6 7 1-7 6hrs

* 0 0 0 0 1 1 1 7 8 1-8 7hrs
* 0 0 0 1 0 0 0 8 9 1-9 8hrs
* 0 0 0 1 0 0 1 9 10 1-10 9hrs
* 0 0 0 1 0 1 0 10 11 1-11 10hrs
* 0 0 0 1 0 1 1 11 12 1-12 11hrs
* 0 0 0 1 1 0 0 12 13 1-13 12hrs
* 0 0 0 1 1 0 1 13 14 1-14 13hrs
* 0 0 0 1 1 1 0 14 15 1-15 14hrs
* 0 0 0 1 1 1 1 15 16 1-16 15hrs
* 0 0 1 0 0 0 0 16 17 2-1 16hrs
* 0 0 1 0 0 0 1 17 18 2-2 17hrs
* 0 0 1 0 0 1 0 18 19 2-3 18hrs
* 0 0 1 0 0 1 1 19 20 2-4 19hrs
* 0 0 1 0 1 0 0 20 21 2-5 20hrs
* 0 0 1 0 1 0 1 21 22 2-6 21hrs
* 0 0 1 0 1 1 0 22 23 2-7 22hrs
* 0 0 1 0 1 1 1 23 24 2-8 23hrs
* 0 0 1 1 0 0 0 24 25 2-9 24hrs
* 0 0 1 1 0 0 1 25 26 2-10 25hrs
* 0 0 1 1 0 1 0 26 27 2-11 26hrs
* 0 0 1 1 0 1 1 27 28 2-12 27hrs
* 0 0 1 1 1 0 0 28 29 2-13 28hrs
* 0 0 1 1 1 0 1 29 30 2-14 29hrs
* 0 0 1 1 1 1 0 30 31 2-15 30hrs
* 0 0 1 1 1 1 1 31 32 2-16 31hrs
* 0 1 0 0 0 0 0 32 33 3-1 32hrs
* 0 1 0 0 0 0 1 33 34 3-2 33hrs
* 0 1 0 0 0 1 0 34 35 3-3 34hrs
* 0 1 0 0 0 1 1 35 36 3-4 35hrs
* 0 1 0 0 1 0 0 36 37 3-5 36hrs
* 0 1 0 0 1 0 1 37 38 3-6 37hrs

* 0 1 0 0 1 1 0 38 39 3-7 38hrs
* 0 1 0 0 1 1 1 39 40 3-8 39hrs
* 0 1 0 1 0 0 0 40 41 3-9 40hrs
* 0 1 0 1 0 0 1 41 42 3-10 41hrs
* 0 1 0 1 0 1 0 42 43 3-11 42hrs
* 0 1 0 1 0 1 1 43 44 3-12 43hrs
* 0 1 0 1 1 0 0 44 45 3-13 44hrs
* 0 1 0 1 1 0 1 45 46 3-14 45hrs
* 0 1 0 1 1 1 0 46 47 3-15 46hrs
* 0 1 0 1 1 1 1 47 48 3-16 47hrs
* 0 1 1 0 0 0 0 48 49 4-1 48hrs
* 0 1 1 0 0 0 1 49 50 4-2 49hrs
* 0 1 1 0 0 1 0 50 51 4-3 50hrs
* 0 1 1 0 0 1 1 51 52 4-4 51hrs
* 0 1 1 0 1 0 0 52 53 4-5 52hrs
* 0 1 1 0 1 0 1 53 54 4-6 53hrs
* 0 1 1 0 1 1 0 54 55 4-7 54hrs
* 0 1 1 0 1 1 1 55 56 4-8 55hrs
* 0 1 1 1 0 0 0 56 57 4-9 56hrs
* 0 1 1 1 0 0 1 57 58 4-10 57hrs
* 0 1 1 1 0 1 0 58 59 4-11 58hrs
* 0 1 1 1 0 1 1 59 60 4-12 59hrs

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Installation and Debugging

Two
Unit

Dialing setting

（1 means dialing to ON，0 means dialing to OFF）

NO.8 NO.7 NO.6 NO.5 NO.4 NO.3 NO.2 NO.1

Low
7-bit

value

Air
conditioner
installation

sequence

Unit

number
of central
controller

Two-unit

switchover

time

* 0 1 1 1 1 0 0 60 61 4-13 60hrs
* 0 1 1 1 1 0 1 61 62 4-14 61hrs
* 0 1 1 1 1 1 0 62 63 4-15 62hrs
* 0 1 1 1 1 1 1 63 64 4-16 63hrs
* 1 0 0 0 0 0 0 64 65 5-1 64hrs
* 1 0 0 0 0 0 1 65 66 5-2 65hrs
* 1 0 0 0 0 1 0 66 67 5-3 66hrs
* 1 0 0 0 0 1 1 67 68 5-4 67hrs
* 1 0 0 0 1 0 0 68 69 5-5 68hrs
* 1 0 0 0 1 0 1 69 70 5-6 69hrs
* 1 0 0 0 1 1 0 70 71 5-7 70hrs
* 1 0 0 0 1 1 1 71 72 5-8 71hrs
* 1 0 0 1 0 0 0 72 73 5-9 72hrs
* 1 0 0 1 0 0 1 73 74 5-10 73hrs
* 1 0 0 1 0 1 0 74 75 5-11 74hrs
* 1 0 0 1 0 1 1 75 76 5-12 75hrs
* 1 0 0 1 1 0 0 76 77 5-13 76hrs
* 1 0 0 1 1 0 1 77 78 5-14 77hrs
* 1 0 0 1 1 1 0 78 79 5-15 78hrs
* 1 0 0 1 1 1 1 79 80 5-16 79hrs
* 1 0 1 0 0 0 0 80 81 6-1 80hrs
* 1 0 1 0 0 0 1 81 82 6-2 81hrs

* 1 0 1 0 0 1 0 82 83 6-3 82hrs
* 1 0 1 0 0 1 1 83 84 6-4 83hrs

* 1 0 1 0 1 0 0 84 85 6-5 84hrs
* 1 0 1 0 1 0 1 85 86 6-6 85hrs
* 1 0 1 0 1 1 0 86 87 6-7 86hrs

* 1 0 1 0 1 1 1 87 88 6-8 87hrs
* 1 0 1 1 0 0 0 88 89 6-9 88hrs
* 1 0 1 1 0 0 1 89 90 6-10 89hrs
* 1 0 1 1 0 1 0 90 91 6-11 90hrs
* 1 0 1 1 0 1 1 91 92 6-12 91hrs
* 1 0 1 1 1 0 0 92 93 6-13 92hrs
* 1 0 1 1 1 0 1 93 94 6-14 93hrs
* 1 0 1 1 1 1 0 94 95 6-15 94hrs
* 1 0 1 1 1 1 1 95 96 6-16 95hrs
* 1 1 0 0 0 0 0 96 97 7-1 96hrs
* 1 1 0 0 0 0 1 97 98 7-2 97hrs
* 1 1 0 0 0 1 0 98 99 7-3 98hrs
* 1 1 0 0 0 1 1 99 100 7-4 99hrs
* 1 1 0 0 1 0 0 100 101 7-5 100hrs
* 1 1 0 0 1 0 1 101 102 7-6 101hrs
* 1 1 0 0 1 1 0 102 103 7-7 102hrs
* 1 1 0 0 1 1 1 103 104 7-8 103hrs

Chff^j\bZe Abj Chg]blbhg^jChff^j\bZe Abj Chg]blbhg^j

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Installation and Debugging

Two
Unit

Dialing setting

（1 means dialing to ON，0 means dialing to OFF）

NO.8 NO.7 NO.8 NO.7 NO.8 NO.7 NO.8 NO.7

Low
7-bit

value

Air
conditioner
installation

sequence

Unit

number

of central

controller

Two-unit

switchover

time

* 1 1 0 1 0 0 0 104 105 7-9 104hrs
* 1 1 0 1 0 0 1 105 106 7-10 105hrs
* 1 1 0 1 0 1 0 106 107 7-11 106hrs
* 1 1 0 1 0 1 1 107 108 7-12 107hrs
* 1 1 0 1 1 0 0 108 109 7-13 108hrs
* 1 1 0 1 1 0 1 109 110 7-14 109hrs
* 1 1 0 1 1 1 0 110 111 7-15 110hrs
* 1 1 0 1 1 1 1 111 112 7-16 111hrs
* 1 1 1 0 0 0 0 112 113 8-1 112hrs
* 1 1 1 0 0 0 1 113 114 8-2 113hrs
* 1 1 1 0 0 1 0 114 115 8-3 114hrs
* 1 1 1 0 0 1 1 115 116 8-4 115hrs
* 1 1 1 0 1 0 0 116 117 8-5 116hrs
* 1 1 1 0 1 0 1 117 118 8-6 117hrs
* 1 1 1 0 1 1 0 118 119 8-7 118hrs
* 1 1 1 0 1 1 1 119 120 8-8 119hrs
* 1 1 1 1 0 0 0 120 121 8-9 120hrs
* 1 1 1 1 0 0 1 121 122 8-10 121hrs
* 1 1 1 1 0 1 0 122 123 8-11 122hrs
* 1 1 1 1 0 1 1 123 124 8-12 123hrs
* 1 1 1 1 1 0 0 124 125 8-13 124hrs
* 1 1 1 1 1 0 1 125 126 8-14 125hrs
* 1 1 1 1 1 1 0 126 127 8-15 126hrs
* 1 1 1 1 1 1 1 127 128 8-16 127hrs

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12 Connecting board IGU04 0010451976

IGU04 detector is used with ICR01 central controller, IGU04 appearance and dimension is same with

detector YCJ-A001

12.1 Appearance

Caution: One central controller can control Up to 5 units of IGU04

CN1

J4

From central
controller

To indoor
units

S1

LED2

LED3

LED1

B-A

Q

P

B-B

From central
controller

To outdoor
units

IGU04

To 220V,50Hz

12.2 PCB photo and drawing

2. Dip switch setting of connecting board ICR01
The dip switch is as below figure (ON:1, OFF: 0):

O N

1 2 3 4 5 6 7 8

S1

LED4

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z 57 z

=>G<F@EH@DC

8.9 8/9 819 829 839 849 859

J J ------<DCC><H@C? ;D:F= :==F>GG 7.

J J -----.<DCC><H@C? ;D:F= :==F>GG 7/

,,,,

J J -....-<DCC><H@C? ;D:F= :==F>GG 730

J J -.....<DCC><H@C? ;D:F= :==F>GG 731

J-

<>CHF:A ;IG A@C>6 03--;:I=

J. <>CHF:A ;IG A@C>6 /1--;:I=

. B:CI:A G>H :==F>GG

809

EDG@H@DC

Commercial Air Conditioner

S1(3-8) is used to set IGU04 address, in one central control system, the address of IGU04
must be different.

12.3.Summarization
For installation information ,please refer central controller ICR01 manual , one ICR01 can
control up to 5 sets of IGU04.

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