Haier HDU-60CA03T3 User manual

Commercial Air Conditioning
SERVICE MANUAL
Models
HDU-50HT03/H
HDU-42CA03T3/H
HDU-50CA03T3/H
HDU-60CA03T3/H
 Features
 T3 climate
 High energy efficiency
 Fixed frequency
 Long distribution pipe and high drop
 Flexible and easy installation
 Auxiliary electric heating function (optional)
 Optional safety devices and much more precision control device
 Weekly timer (standard)
 Group control function(Optional)
 Auto restart function
Manual code: SYJS-012-08REV.0Edition: 2008-07-23

Commercial Air Conditioner
CONTENTS
Contents………………………………………………………...2
1. Description of products & features………………………..3
2. Specification…………………………………………………5
3. Safety precaution……………………………………………7
4. Net dimension………………………………………………..9
5. Installation instructions………..……………………………10
6. Parts and functions…………………………………………15
7. Controller functions…………………………………………16
8. Electrical control functions…………………………………16
9. Electrical data……………………………………………….31
10. Troubleshooting…………………………………………...34
11. Noise curves..................................................................36
12. Performance curves.......................................................37
2

Commercial Air Conditioner
1.DESCRIPTION OF PRODUCTS & FEATURES
1.1. Products code explanation
1.2 Brief Introduction for T1、T2、T3 working condition
Type of Air
Conditioner
Climate type
T1 T2 T3
Cooling Only 18 ℃~43℃10℃~35℃21℃~52℃
Heat pump -7℃~43℃-7℃~35℃-7℃~52℃
Electricity Heating ~43℃~35℃~52℃
1.3 Operating Range of Air Conditioners(for T3 climate)
Temp. Mode Rated Maximum Minimum
Cooling
Indoor DB ℃29 32 18
WB ℃19 23 14
Outdoor DB ℃46 52 10
WB ℃24 31 6
Heating
Indoor DB ℃20 27 15
WB ℃14.5 --- --
Outdoor DB ℃7 24 -7
WB ℃6 18 ---
HD U- 42 C A 03 T3 / H
H:high ESP duct unit;M:middle ESP duct unit
T3:climate type
Power supply type: 03 stands for 200-220V, 50Hz
Design sequence
C: cooling; H: heating
Cooling capacity: 42=42000BTU/h
U: single split unit
Product type : “B” stands for cassette type, “CF” stands for
convertible type, ”D” stands for duct, ”P” stands for cabinet
system,
Haier Brand Air Conditioner
3

Commercial Air Conditioner
1.4 Product features
Flexible and easy installation
The outdoor can meet the higher request of installation. From the specifications, you will find for
each unit, how long and how high the piping will be, which will be convenient for design and installation.
High efficiency filter
The unit adopts G3 grade filter, can efficiently filter the dirt etc, and improve the room air quality, at
the same time, the filter can pull out from downside, convenient for maintenance and cleaning.
Multi-mode for installation
The indoor unit can be installed with or without an air return duct according to the installation need.
Free setting of air discharging duct
The number of the airflow outlet and its installation position can be freely selected according to the
environment of the room, sufficiently considering the load of the room and the uniform temperature of the
room to realize more perfect comfort.
High esp design
Max. external static pressure of 196 Pa brings the quick temperature adjustment to the room.
Adopts high pressure fan to provide quich speed of air blowing while keeping a low sound level and
ensuring a good air circulation of the whole indoor space.
Optional safety devices and much more precision control device
a. Ambient temperature sensor, coil temperature sensor and compressor temperature sensor
make the temperature control and defrosting control more precise.
b. High/low pressure switch can feel the discharging pipe pressure and suction pipe pressure on
time and precisely. If the pressure is too low or too high, it will stop the compressor to prevent it
being damaged for the sake of pressure.
c. 3 minutes delay protection for the compressor, the device can protect the compressor from
some damages and make the compressor have a long life.
Group control and Central control if connected with with a group
controller or a central controller
Weekly timing function, if connected with a weekly timer YCS-A001
4

Commercial Air Conditioner
2. SPECIFICATION
Function coolingheating
Capacity BTU/h 49800 56300
Capacity kW 14.6 16.5
Sensible heat ratio 0.7
W6540 5830
W7767 6160
EER or COP W/W 2.2 2.8
Dehumidifying capacity 10‐³×m³/h
Power cable section
Signal cable section
Connecting cable section
Wired control cable for wired control unit section
Power source N, V, Hz
A / A
Start Current A
Class of anti electric shock CLASS I CLASS I
Circuit breaker A
Max. operating pressure of heat side Mpa 2.8 2.8
Max. operating pressure of cold side Mpa 2.8 2.8
Unit model (color)
Type × Number
Speed(H-M-L) r/min
Fan motor output power kW
Air-flow(H-M-L) m³/h
Heat exchanger Type / Diameter mm
External （L×W×H）mm×mm×mm
Package （L×W×H）mm×mm×mm
Control type (Remote /wired /model)
dB(A)
kg / kg
Unit model (color)
Model / Manufacture
Oil model
Oil charging
Type
Protection type
Starting method
Type × Number
Speed r/min
Fan motor output power kW
Air-flow(H-M-L) m³/h
Heat exchanger Type / Diameter mm
External （L×W×H）mm×mm×mm
Package （L×W×H）mm×mm×mm
Refrigerant control method mm/mm
Noise level dB(A)
crankcase heater power W
kg / kg
Type / Charge g
Recharge quantity g/m
Liquid mm
Gas mm
Connecting Method
m
m
4 x 0.33 mm2
55/52/47
40
64
840
6000
Fan
inner grooved/φ9.52
Fan
Compressor
Inner thermal protection
SCROLL
Defrosting Automatic
Axial*2
hard startup
Capillary tube
0.06
MAX.Drop
50MAX.Pipinglength
Weight (Net / Shipping) 91/111
30
Refrigerant
wired
PIPING
R22/4300
65
Pipe φ9.52
φ19.05
Flared
Between I.D &O.
Outdoor unit
HDU-50HT03/H(WHITE)
Weight (Net / Shipping) 65/80
Dimension 948*340*1250
1090*410*1350
ZR61KH-TFD-522/COPELAND
SONTEX 200 LT
1656
item Model HDU-50HT03/H
5.0
5G×2.5mm2
Total power input
Max. power input
Running /Max.Running
centrifugal
Dimension
50
1560～2650
1385×965×418
1197×828×355
inner grooved/φ7
4G×1.5mm2
30
0.27
1110/880/720
3N，380-400V，50HZ
Indoor unit
HDU-50HT03/H(GREY)
Noise level (H-M-L)
Cooling 9.5A/11.3A Heating 9.1/10.35
5

Commercial Air Conditioner
HDU-42CA03T3/H
cooling only
Btu/h 42000（12309W/10584kca/h）
%80
W4150
W5700
W/W 3.0
L/h 3.5
N, V, Hz 3N~,380-415V,50Hz
V342
V462
A / A 7.5A /10.0A
A56
A30
HDU-42CA03T3/H (GREY)
N, V, Hz 1PH,220-240V,50Hz
centrifugal×2
blue plug （H-L）r/min 1215-1050
red plug （H-L）r/min 1140-880
white plug （H-L）r/min 1050-880
kW 0.45
blue plug H Pa 100
red plug H Pa 80
white plug H Pa 50
0Pa m³/h H:2950 L: 2400
100Pa m³/h H:2250 L: 1920
0Pa m³/h H:2460 L: 1980
80Pa m³/h H:2250 L: 1720
0Pa m³/h H:2400 L: 1980
50Pa m³/h H:2250 L: 1820
mm 9.52
m² 0.452
L×W×H mm×mm×mm 1197×830×350
L×W×H mm×mm×mm 1430×940×420
mm PVC 26/32
hard wired / YR-E12
dB(A) 54-52
kg / kg 62/70
HDU-42CA03T3/H (WHITE)
N, V, Hz 3N~,380-415V,50Hz
ZR54KS-TFD-522/COPELAND
BLENDED WHITE MINERAL OIL
1242cm³
SCROLL
axial×2
r/min 1000±40
kW 0.23×2
m³/h 6000
mm 9.52
2/1.60
L×W×H mm×mm×mm 948×340×1250
L×W×H mm×mm×mm 1095×415×1400
capillary tubes
L3.2
dB(A) 60
kg / kg 95/100
Hi MPa 2.85
Lo MPa 1.2
gR22/3000
g/m 65
mm Φ9.52
mm Φ19.05
Flare type
m30
m50
red plug
white plug
Design Pressure
Total air-flow
External
Control type (type/model)
Oil type
Oil charging
Type
Noise level （H-L with blue plug）
Weight (Net / Shipping)
Unit model
Model / Manufacture
Starting Current
item Model
Outdoor unit
Compressor
Fan + motor
Heat exchanger
Dimension
Tube diameter
Face area
Heat exchanger
Power source
Min. Spec. Voltage
Max. Spec. Voltage
Running /Max.Running current
Fan motor input power
Function
Capacity
Sensible heat ratio
Total power input
Max. power input
EER
Dehumidifying capacity
Fan motor input power
Fan + motor
Circuit breaker
Model
Type × Number
Indoor unit
Package
Drainage pipe (material , I.D./O.D.)
Fan speed
Air-flows
Fan motor plugs &
static pressure
blue plug
Gas
PIPING
Refrigerant
Pipe
Between I.D &O.D
Connecting Method
MAX.Drop
Recharge quantity
Liquid
MAX.Piping length
Volume of Accumulator
Noise level
Weight(Net / Shipping)
Type / Charge
Power source
Power source
Package
Refrigerant control method
Diameter
Row / Fin pitch （mm）
Speed
External
Type × Number
Dimension
6

Commercial Air Conditioner
HDU-50CA03T3/H
cooling only
Btu/h 50000（14654W/12600kca/h）
%77
W4590
W6300
W/W 3.2
L/h 4.5
N, V, Hz 3N~,380-415V,50Hz
V342
V462
A / A 7.85A /10.5A
A59
A30
HDU-50CA03T3/H (GREY)
N, V, Hz 1PH,220-240V,50Hz
centrifugal×2
blue plug （H-L）r/min 1215-1050
red plug （H-L）r/min 1140-880
white plug （H-L）r/min 1050-880
kW 0.45
blue plug H Pa 100
red plug H Pa 80
white plug H Pa 50
0Pa m³/h H:2950 L: 2400
100Pa m³/h H:2250 L: 1920
0Pa m³/h H:2460 L: 1980
80Pa m³/h H:2250 L: 1720
0Pa m³/h H:2400 L: 1980
50Pa m³/h H:2250 L: 1820
mm 9.52
m² 0.452
L×W×H mm×mm×mm 1197×830×350
L×W×H mm×mm×mm 1430×940×420
mm PVC 26/32
hard wired / YR-E12
dB(A) 54-52
kg / kg 62/70
HDU-50CA03T3/H (WHITE)
N, V, Hz 3N~,380-415V,50Hz
ZR61KS-TFD-522/COPELAND
BLENDED WHITE MINERAL OIL
1242cm³
SCROLL
axial×2
r/min 1000±40
kW 0.23×2
m³/h 6000
mm 9.52
2/1.60
L×W×H mm×mm×mm 948×340×1250
L×W×H mm×mm×mm 1095×415×1400
capillary tubes
L3.2
dB(A) 60
kg / kg 99/104
Hi MPa 2.85
Lo MPa 1.2
gR22/3400
g/m 65
mm Φ9.52
mm Φ19.05
Flare type
m30
m50
Design Pressure
item Model
Function
Capacity
Sensible heat ratio
Total power input
Max. power input
EER
Dehumidifying capacity
Power source
Fan motor plugs &
static pressure
Air-flows
Min. Spec. Voltage
Max. Spec. Voltage
Running /Max.Running current
Starting Current
blue plug
red plug
white plug
Heat exchanger Tube diameter
Face area
Circuit breaker
Indoor unit
Model
Fan + motor
Type × Number
Fan speed
Fan motor input power
Dimension External
Package
Drainage pipe (material , I.D./O.D.)
Control type (type/model)
Noise level （H-L with blue plug）
Weight (Net / Shipping)
Outdoor unit
Unit model
Compressor
Model / Manufacture
Oil type
Oil charging
Type
Package
Fan + motor
Type × Number
Speed
Fan motor input power
Total air-flow
Row / Fin pitch （mm）
Dimension External
Between I.D &O.D
Refrigerant control method
Volume of Accumulator
Noise level
Weight (Net / Shipping)
MAX.Drop
MAX.Piping length
PIPING
Pipe Liquid
Gas
Connecting Method
Power source
Power source
Refrigerant Type / Charge
Recharge quantity
Heat exchanger Diameter
7

Commercial Air Conditioner
HDU-60CA03T3/H
cooling only
Btu/h 57000（16705W/14364kca/h）
%73
W5200
W7000
W/W 3.2
L/h 5.5
N, V, Hz 3N~,380-415V,50Hz
V342
V462
A / A 9.0.A /13.3A
A74
A30
HDU-60CA03T3/H (GREY)
N, V, Hz 1PH,220-240V,50Hz
centrifugal×2
blue plug （H-L）r/min 1210-1050
red plug （H-L）r/min 1150-880
white plug （H-L）r/min 1050-880
kW 0.45
blue plug H Pa 100
red plug H Pa 80
white plug H Pa 50
0Pa m³/h H:2950 L: 2400
100Pa m³/h H:2250 L: 1920
0Pa m³/h H:2460 L: 1980
80Pa m³/h H:2250 L: 1720
0Pa m³/h H:2400 L: 1980
50Pa m³/h H:2250 L: 1820
mm 9.52
m² 0.452
L×W×H mm×mm×mm 1197×830×350
L×W×H mm×mm×mm 1430×940×420
mm PVC 26/32
hard wired / YR-E12
dB(A) 54-52
kg / kg 62/70
HDU-60CA03T3/H (WHITE)
N, V, Hz 3N~,380-415V,50Hz
ZR68KC-TFD-522/COPELAND
BLENDED WHITE MINERAL OIL
1774cm³
SCROLL
axial×2
r/min 1000±40
kW 0.23×2
m³/h 6000
mm 9.52
2/1.60
L×W×H mm×mm×mm 948×340×1250
L×W×H mm×mm×mm 1095×415×1400
capillary tube+piston throttle (102#)
L3.2
dB(A) 60
kg / kg 106/111
Hi MPa 2.85
Lo MPa 1.2
gR22/4000
g/m 65
mm Φ12.7
mm Φ19.05
Flare type
m30
m50
Norminal condition: indoor temperature (cooling): 29 ℃DB/19℃WB, Outdoor temperature(cooling): 46 ℃DB/24℃WB,
The noise level will be measured in the third octave band limited values, using a Real Time Analyser calibrated sound intensity meter. It
is a sound pressure noise level. The detailed method please refer to the following information:
Design Pressure
item Model
Function
Capacity
Sensible heat ratio
Total power input
Max. power input
EER
Dehumidifying capacity
Fan motor input power
Fan motor plugs &
static pressure
Air-flows
Power source
Min. Spec. Voltage
Max. Spec. Voltage
Running /Max.Running current
blue plug
red plug
white plug
Heat exchanger Tube diameter
Face area
Starting Current
Circuit breaker
Indoor unit
Model
Fan + motor
Type × Number
Fan speed
Dimension External
Package
Drainage pipe (material , I.D./O.D.)
Control type (type/model)
Noise level （H-L with blue plug）
Weight (Net / Shipping)
Outdoor unit
Unit model
Compressor
Model / Manufacture
Oil type
Oil charging
Type
Package
Fan + motor
Type × Number
Speed
Fan motor input power
Total air-flow
Row / Fin pitch （mm）
Dimension External
Between I.D &O.D
Refrigerant control method
Volume of Accumulator
Noise level
Weight (Net / Shipping)
MAX.Drop
MAX.Piping length
PIPING
Pipe Liquid
Gas
Connecting Method
Power source
Power source
Refrigerant Type / Charge
Recharge quantity
Heat exchanger Diameter
8

Commercial Air Conditioner
Installation state: the unit should be placed on the flat floor or be mounted in horizontal
direction.
Testing method:
duct unit without auxiliary duct: duct unit with auxiliary duct:
1.4m
2m
duct
auxiliary duct
2m
1.4m
1m
auxiliary duct
outdoor unit:
1.air outlet from side: the noise level is the average sound pressure level measured from front, left, right directions.
2.air outlet from top: the noise level is the average sound pressure level measured from front, back, left, right directions.
measured point:
H ( height to the ground) = (h (unit height) + 1m) /2
and, it is 1m to each side.
h
1m
1m
1m
1m
Note: ⊙is the real time
analyser position
9

Commercial Air Conditioner
3. Safety precaution
Carefully read the following information in order to operate the airconditioner correctly.
Below are listed three kinds of Safety Cautions and Suggestions.
WARNING! Incorrect operations may result in severe consequences of death or serious injuries.
CAUTION! Incorrect operations may result in injuries or machine damages; in some cases may
cause serious consequences.
IN TRUCTION : These information can ensure the correct operation of the machine.
Be sure to conform with the following important Safety Cautions.
The afety Cautions should be at hand so that they can be checked at any time when needed.
If the conditioner is transferred to the new user this manual should be as well transferred to the new user.
WARNING!
If any abnormal phenomena is found
(e. g.smell of firing), please cut off the
power supply immediately, and contact
the dealer to find out the handling
method.
Don't dismantle the outlet of the
outdoor unit.
The exposure of fan is very dangerous
whichmay harm human beings.
switch
off
In such case to continue using the
conditioner will damage the conditioner
and may cause electrical shock or fire
hazard.
Incorrect maintenance and repairment
may cause water leak electrical shock
and fire hazard.
When need maintenance and repairment,
call dealer to handle it.
After a long time use of air-conditioner
the base should be checked for any
damages.
If the damaged base is not repaired the
unit may fall down and cause accidents.
10

Commercial Air Conditioner
Air-conditioner can't be installed in
the environment with inflammable
gases because the inflammable gases
near to air-conditioner may cause fire
hazard.
Connect earthing wire.
Use discharge pipe correctly to ensure
efficient discharge.
Earthing wire should not be con-
nected to the gas pipe water pipe
lightning rod or phone line in-correct
earthing may cause shock.
Incorrect pipe use may cause water
leaking.
Earthing
WARNING!
Installed electrical-leaking circuit
breaker.
It easily cause electrical shock without
circuit breaker.
Please let the dealer be responsible for
installing the conditioner.
Incorrect installation may cause water
leak electrical shock and fire hazard.
Call the dealer to take measures to
prevent the refrigerant from leaking.
If conditioner is installed in a small
room be sure to take every measure in
order to prevent suffocation accident
even in case of refrigerant leakage.
When conditioner is deinstalled or
reinstalleddealer should be responsible
for them.
Incorrect installation may cause water
leaking electrical shock and fire hazard.
No goods or nobody is permitted to
placed on or stand on outdoor unit.
The falling of goods and people may
cause accidents.
Don't operate the air-conditioner with
damp hands.
Otherwise will be shocked.
Only use correctly-typed fuse.
May not use wire or any other materials
replacing fuse other-wise may cause
faults or fire accidents.
11

Commercial Air Conditioner
4. Net dimension
1105
1200
170 270
250
365
185
250
60 45
800
1320
830
(mm)
948
1250
25
Power wiring Terminal
184 184
55
Screw Hole
580
70
380 18
340
18
(4xM10)
12

NO
L1
500
Commercial Air Conditioner
5. Installation Instructions
5.1 Outdoor unit installation
1. Accessories
"Edging" or protection o electric wires rom an
opening edge.
2. Selection of the place of installation
Edging
Select the place o installation satis ying the ollowing conditions and, at the
same time, obtain a consent rom the client or user.
Place where air circulates.
Place ree rom heat radiation rom other heat sources.
Place where drain water may be discharged.
Place where noise and hot air may not disturb the neighborhood.
Place where there is not heavy snow all in the winter time.
Place where obstacles do not exist near the air inlet and air outlet .
Place where the air outlet may not be exposed to a strong wind.
Place surrounded at our sides are not suitable or installation. A 1m or more
o overhead space is needed or the unit.
Mount guide-louvers to place where short-circuit is a possibility.
When installing several units, secure su icient suction space to avoid short
circuiting.
(1) Open space requirement around the unit
Air inlet
L3
(Servicing
inlet space)
Air outlet
L2
Air
Note :
(1). Fix the parts with screws
(2).Don't intake the strong wind directly to the
outlet air- low hole.
(3).A one meter distance should be kept rom the
unit top
(4).Don't block the surroundings o the unit with
sundries
Unit: mm
Case
Distance
open open
open
500
150
150 300
300 0
L1
L2
L3
III III
Wind direction
(2) Installation where the area with strong winds.
Install the unit so that the air outlet section o the unit must NOT be aced
toward wind direction.
13

Commercial Air Conditioner
3. Installation of outdoor unit
(1) Installation
Fix the unit in a proper way according to the condition o a place where it is
installed by re erring to the ollowing .
(a) Concrete oundation (b) Foundation anchor
Unit
To ix by bolts
Anchor bolt Concrete oundation
Unit
Concrete oundation
Anchor bolt
Note: (1) Give enough room or the concrete
oundation to ix by anchor bolts. Note: (1) Place the concrete oundation deep enough.
Install the unit so that the angle o inclination must be less than 3 degrees.
(2) Installation sketch of outdoor unit
340
580
380
948 Power wiring Terminal
25
1250
4. Refrigerant piping
Flare connection
3-way stop valve
Outdoor
unit
Gas pipe
Liquid
pipe
Indoor
unit
2-way stop valve
14

Y/G
Commercial Air Conditioner
iping size
Install the removed lare nuts to
90+0.5
Gas pipe
9.52x0.8mm
19.05x1.0mm
Liquid pipe
HDU-50HT03/H
the pipes to be connected, then
lare the pipes.
Limitations for one way piping length and vertical height difference.
Model
One way piping length Vertical height di erence
(between indoor and outdoor)
less than 50 m less than 30 m
HDU-50HT03/H
The detail in ormation please re er to the installation manual.
Selection o size o power supply and interconnecting wires.
Select wire sizes and circuit protection rom table below. (This table shows 20 m length
wires with less than 2% voltage drop.)
Item Circuit breaker Power Earth leakage breaker
Model PhaseSwitch breaker
(A)
Overcurrent
protector
source wire
size
Switch
break
Leak
curren
HDU-50HT03/H
330 20 2.5mm
2
30 30mA
Wiring connection
N 1 2 3
Y/G
R S T
POWER SUPPLY:
To Indoor Unit
3N~,380-400V,50Hz
Gas pipe
Liquid pipe
Gas pipe
9.52x0.8mm
12.7x0.8mm
19.05x1.0mm
Liquid pipe
19.05x1.0mm
H U-42CA03T3/H
H U-50CA03T3/H
H U-60CA03T3/H
H U-42CA03T3/H
H U-50CA03T3/H
H U-60CA03T3/H
Model
One way piping length Vertical height difference
(between indoor and outdoor)
less than 50 m less than 30 m
it is also apply to HDU-42CA03T3/H,HDU-50CA03T3/H,
HDU-60CA03T3/H
15

Hint
Siz
ire
ire
Commercial Air Conditioner
5.2 Indoor unit installation
1. Remove upper part of ire controller
Remove upper part of ire controller
PCB is mounted on lo er part of ire controller, be careful not to damage it.
Upper part of irecontroller
2. Install ire controller
(1) For exposed installation, use 2 ood scre s .
(2) For recessed installation, use 2 ood scre s .
Lo er part of ire
controller
Note:
Try as far as possible a flat surface for installation. Don't use excessive force hen
tightening scre s, or lo er part might got deformed.
3. Indoor unit iring
Connect terminals (A,B,C,D) on lo er part of ire When make iring, please
controller to terminals (A, B,C,D) on PCB of indoor keep a distance bet een
unit. ires and po er supply cord.
iring from here Wire
AB CD
Lo er part of Cord kind Shield ire (4 core) (refer to Hint
0.33mm
2
Use shielede ires for telecommunication bet een
ire controller and indoor unit; indoor unit and
outdoor unit. Ground the shield on one side.
Other ise misoperation because of noise may occur.
Signal ire is self-provided.
Upper part of
ground
Shielded ire
16

Hint
Hint
Commercial Air Conditioner
Tread surface of the terminal ell so that shielding may not contact other part.
4. Replace the upper part of ire controller
Be careful not to press the iring.
1. S itch box and cord for iring are not supplied.
2. Don't touch PCB ith hand.
Change-over s itch
Mark ON OFF
1Fixed Frequency Inverter
2Have rise and drop No rise and drop
3S ing Not S ing
4The collection
temperature of
indoor unit
The collection
temperature of ire
controller.
For HDU-50HT03/H, change-over s itch is set:
1. ON 2.OFF 3.OFF 4.OFF
The detail information please refer to the installation manual.
5. Electric iring
WARNING
DANGER OF BODILY INJURY OR DEATH
TURN OFF ELECTRIC POWER AT CIRCUIT BREAKER OR POWER SOURCE BEFORE
MAKING ANY ELECTRIC CONNECTIONS. GROUND CONNECTIONS MUST BE
COMPLETED BEFORE MAKING LINE VOLTAGE CONNECTIONS.
(1) Selection of size of po er supply and interconnecting ires.
Precautions for Electric iring
Electric iring ork should be conducted only by authorized personnel.
Do not connect more than three ires to the terminal block. Al ays use round type crimped
terminal lugs ith insulated grip on the ends of the ires.
Use copper conductor only.
Select ire sizes and circuit protection from table belo . (This table sho s 20 m length
ires ith less than 2% voltage drop.)
Item Circuit breaker Po er Earth leakage breaker
Model PhaseS itch breaker
(A)
Overcurrent
protector
source ire
size
S itch
break
Leak
curren
HDU-50HT03/H 330 20 2.5mm230 30mA
(2) Wiring connection
Make iring to supply po er to the outdoor unit, so that the po er for the indoor unit is supplied by
terminals.
N 1 2 3R S T
Y/G
1 2 3
POWER SUPPLY:
Y/G
3N~,380-400V , 50Hz
INDOOR UNIT TERMINAL BLOCK
it is also apply to HDU-42CA03T3/H,HDU-50CA03T3/H,
HDU-60CA03T3/H
17

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04-/.02130
-60-
-53-
Commercial Air Conditioner
6. Parts and Functions
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18

Commercial Air Conditioner
7.Refrigerant circuit
19

Commercial Air Conditioner
8. Controller functions
For HDU-50HT03/H,HDU-42,50,60CA03T3/H, the indoor unit can be controlled by wired controller
YR-E06.
9. Electrical Control Functions
9.1 For indoor unit
1. General notes for the function
1.1 The electric system can control the following functions of the commercial air conditioner.
Operation mode includes auto run, cooling, dehumidifying, venting, and heating. It can set the
compulsory cooling, and indoor fan motor has auto, high, med, low three selection. And it can set
TIMER ON, TIMER OFF, TIMER ON/OFF and SLEEP; auto check water level in the container and
control the drainage; swing controlled by synchro-motor; equipped with compressor 3-minutes
protection; overload protection; freezing protection; sensor broken down protection, etc. Also it can
check communication failure and measure indoors room temperature, indoor coil temperature.
Operation panel adopts LCD display, receiving the indication by pressing buttons, and it can realize
remote control function, also is responsible to measure indoor room temperature and it adopts
serial communication type with main board.
1.2 LED indication: when the unit is switched on by the controller, the POWER LED will be ON,
when being switched off, the POWER LED will be OFF. If the controller is in TIMER and SLEEP
mode, the TIMER LED will be on; if it is not in TIMER and SLEEP mode, the TIMER LED will be off.
When the compressor is running, the compressor LED will be on; when it stops, this LED will be off.
1.3 Temperature compensation control: select the 4 degree compensation when use ambient
temperature sensor on the indoor PCB( include: remote control type and wired control type use
indoor ambient temperature sensor).
1.4 There is set temperature in AUTO mode as default.
1.5 Do not receive the remote OFF signal when enter defrost mode.
2. Control modes selection
2.1 Auto fan speed selection
The following Tr stands for room temperature, Ts stands for set temperature.
2.1.1 In cooling mode
If it is the first time to enter auto fan mode(fan motor is stop), when Tr>Ts+2, it is in High speed; Tr
≤Ts, it is in Low speed; Otherwise, it is in Med speed. If the current mode is auto high speed, when
Tr＜Ts+2, fan speed will turn to med speed automatically. If the current mode is auto med speed,
when Tr＞Ts+3, it will turn to high speed, Tr＜Ts,
it will turnto
low speed.
If current
mode is low
Temp. reducing
Med
Ts＋2℃
High
Ts＋3℃
High
speed, when
Ts＋1℃
Med
Tr＞Ts+1, it
will turn to med Ts Low
speed. When fan Low
speed changes from low to
Temp. arising
20