Haier AU122AEERA User manual

Commercial Air Conditioning
SERVICE MANUAL
Models
 Features
 High energy efficiency
 Infrared control type or wired control type
 Low ambient cooling kit (optional) and low ambient heating kit (optional)
 New friendly refrigerant R410a, environment protection
 Advanced technology, DC inverter control function
 Weekly timer (standard)
 Group control function
 Auto restart function
 Room card function
AB122ACERA
AC122ACERA
AD122ALERA
AU122AEERA
 Can be connected with the universal outdoor unit AU122AEERA
Manual code: SYJS-020-07REV.0 Edition: 2007-05-15

2
CONTENTS
Contents………………………………………………………...2
1. Description of products & features………………………..3
2. Specification…………………………………………………7
Commercial Air Conditioner Model: AU122AEERA AB122ACERA
AC122ACERA AD122ALERA
3. Safety precaution…………………………………………..10
4. Net dimension………………………………………………12
5. Installation instructions………..…………………………...14
6. Parts and functions…………………………………………30
7. Controller functions…………………………………………32
8. Refrigerant circuit…………………………………………...33
9. Electrical control functions…………………………………34
10. Electrical data………………………………………………49
11. Troubleshooting …………….....………………………….57
12. Noise level.....................................................................61

Commercial Air Conditioner
3
1.1. Products code explanation
Climate type: T1 (see table 1)
Design number (R stands for design sequence, DC inverter
frequency type)
Product type: A stands for heat pump type, refrigerant is R22
B stands for heat pump type, refrigerant is R407C
E stands for heat pump type, refrigerant is R410a
Q stands for cool only type, refrigerant is R410A
Outlook appearance
Product series: A stands for 1 to 1
Applicable voltage: 2 stands for 220~230V/50Hz,
4 stands for 220V/60Hz，N stand for 380~400VAC/50Hz
Product type : “B” stands for cassette type, “C” stands for
convertible type, ”D” stands for duct, “S” stands for wall
mounted type, ”Q” stands for chiller system, "E" stands for
ceiling concealed type, “U” stands for outdoor unit
Air Conditioner
1.2 Brief Introduction for T1、T2、T3 working condition
1.3 Operating Range of Air Conditioners
Temp. Mode Rated Maximum Minimum
DB ℃27 32 15
Indoor
WB ℃19 23 14
DB ℃35 43 -5
Cooling
Outdoor
WB ℃24 26 6
DB ℃20 27 10
Indoor
WB ℃14.5 --- --
DB ℃7 23 -10
Heating
Outdoor
WB ℃6 18 ---
Climate type
Type of Air
Conditioner T1 T2 T3
Cooling Only 18 ℃~43℃10℃~35℃21℃~52℃
Heat pump -7℃~43℃-7℃~35℃-7℃~52℃
Electricity Heating ~43℃~35℃~52℃
Model: AU122AEERA AB122ACERA
AC122ACERA AD122ALERA
1.DESCRIPTION OF PRODUCTS & FEATURES
AC 12 2 A C E R A
Cooling / Heating capacity,12=12000BTU/h

Commercial Air Conditioner
4
1.4 Product features
Adopt the much friendlier refrigerant R410a
The air conditioner system adopts the greatly friendly refrigerant R410a, which is protective for the
ozone layer and is good to avoid the earth getting warmer. Benefit for the environment.
Adopt the advanced DC inverter technology
The system adopts the advanced DC inverter technology, which can consume less power energy to
realize the equal efficiency, saving money for you.
Smart newly designed infrared remote controller
Auto–restart function (optional)
All indoor units have auto-restart function. When the power supply cut off suddenly, the unit will
automatically recover the previous running mode once the power supply is on.
Low temperature cooling realized, super low temperature heating
realized.
Low ambient cooling kit (optional)
Group control function (with a group controller YR-E12)
Central control function, if connected with a central controller
YCZ-A001
Weekly timing function, if connected with a weekly timer YCS-A001
Model: AU122AEERA AB122ACERA
AC122ACERA AD122ALERA
The cassette and convertible unit can be controlled by the infrared remote controller YR-H71, the remote
controller can be fixed with a remote controller holder.
Long-life& high efficiency air purify filter

Commercial Air Conditioner
5
1.5 New friendly refrigerant R410A introduction:
■R410A
The working pressure of R410A is approximately 1.6 times higher than R22. Because the oil in the
refrigerant is different, please do not mix them.
Refrigerant R22 (single) R410A (mixed) R407C (mixed)
Oil Mineral oil (SONTEX 200LT) Synthetic oil (POE oil) Synthetic oil (POE oil)
Pressure ratio 1 Approx. 1.6 Approx. 1.1
■Operation flow
1. Calculate the refrigerant additional charging
amount, and charge a suitable amount.
1. Air purging by refrigerant is prohibited seriously
2. Use a special vacuum pump with reverse check
mechanism
1. Charge the nitrogen to the set pressure
2. 24 hours later,check if the pressure in the pipe
has reduced
1. Do not connect the power supply
1. Use piping material of the specified thickness
2. Do not use dirty pipe
3. Always flow nitrogen during welding work
hand over
trial running and adjustment
maintenance panel installation
gas leakage check
additional refrigerant charging
evacuation and drying
leakage test
refrigerant piping connection
outdoor unit installation
outdoor unit foundation work
electric wiring work
remote controller installation
insulation work
duct work
drain piping work
refrigerant piping work
indoor unit installation
operation chart preparation
1. Always inspect the used refrigerant
2. Always use the specified refrigerant
refrigerant inspection
prepare work schedule
Model: AU122AEERA AB122ACERA
AC122ACERA AD122ALERA

Commercial Air Conditioner
6
■Piping material
1. Use the correct refrigerant piping and materials for R410A
2. For the pipe wall thickness, see the table below:
Pipe diameter Φ6.35 Φ9.52 Φ12.7 Φ15.88 Φ19.1
Pipe wall thickness 0.8 0.8 0.8 1.0 1.2
Note: Always observe and comply with the local regulations when installing the refrigerant piping.
■Tools
R410A work requires a number of special tools (* symbol). Since the tools used in R22 work
cannot be used for R410A, provide the tools separately.
Tool name Process and application
Pipe cutter Piping cutting
*Flaring tool Pipe flaring work
*Torque wrench Flare nut connection
Expander Expansion at pipe connection
Pipe bender Pipe bending work
Refrigerant piping work
Nitrogen gas Pipe oxidation prevention
Welder Pipe brazing
Air tightness test
*Gauge manifold
*Charging hose
Vacuum evacuation and refrigerant
charging operation check
Air tightness test
Refrigerant additional
charging
*Vacuum pump (with
adapter)
Vacuum drying
Electronic scale
Gas leakage detector Gas leakage test
Refrigerant additional
charging
■Work precautions
Refrigerant check: Before work, check the used refrigerant and prepare materials matched to the
refrigerant.
Refrigerant piping: Observe the basics of refrigerant piping to avoid the unnecessary problems. In
addition, when performing the welding work, seal in the nitrogen gas to the pipes, and prevent it
from the oxidation.
Leak pressure detection: Perform seal detection and make sure there is no refrigerant leakage.
Vacuum drying: If the vacuum pump has not the reverse flow check mechanism, use the pump
together with a reverse flow check adapter.
Additional refrigerant: Charge a suitable amount of refrigerant with a special R410A gauge
manifold and charging hose.
Model: AU122AEERA AB122ACERA
AC122ACERA AD122ALERA

Commercial Air Conditioner
2. SPECIFICATION
Function coolin
g
heatin
g
Capacity kW 3.52(0.9--4.4) 4.4(1.0---4.8)
Sensible heat ratio 0.71
W 1250(280---1650) 1210(280--1650)
W 1650 1650
EER or COP W/W 2.81（C）3.64（A）
Dehumidifying capacity 10‐³×m³/h
Power cable
Power source N, V, Hz
A / A 6.0(1.4--8.0)A/8A 6.0(1.4--8.0)A/8A
Start Current A 3 3
Circuit breaker A 13 13
Unit model (color)
Type × Number
Speed(H-M-L) r/min
Fan motor output power kW
Air-flow(H-M-L) m³/h
Type / Diameter mm
Total Area m²
Temp. scope ℃
External （L×W×H）mm×mm×mm
Package （L×W×H）mm×mm×mm
Drainage pipe (material , I.D./O.D.) mm
Control type (Remote /wired)
Fresh air hole dimension mm
dB(A)
kg / kg
External （L×W×H）mm×mm×mm
Package （L×W×H）mm×mm×mm
kg / kg
Function cooling heating
Capacity kW 4.1(0.9--4.6) 4.4(1.0---5.1)
Sensible heat ratio 0.71
W 1270(280---1650) 1210(280--1650)
W 1650 1650
EER or COP W/W 3.23（A）3.64（A）
Dehumidifying capacity 10‐³×m³/h
Power cable
Power source N, V, Hz
A / A 6.0(1.4--8.0)A/8A 6.0(1.4--8.0)A/8A
Start Current A 3 3
Circuit breaker A 13 13
Unit model (color)
Type × Number
Speed(H-M-L) r/min
Fan motor output power kW
Air-flow(H-M-L) m³/h
Type / Diameter mm
Total Area m²
Temp. scope ℃
External （L×W×H）mm×mm×mm
Package （L×W×H）mm×mm×mm
Drainage pipe (material , I.D./O.D.) mm
Control type (Remote /wired)
dB(A)
kg / kg
item Mod
e
AB122ACERA
Total power input
Max. power input
ENERGY CLASS
1.5
3×2.5
1, 220--230, 50
1.6
Running
Indoor unit
AB122ACERA(BLACK)
Fan
Centrifugal fan*1
795/690/550±50
0.065
700/620/520
Heat exchanger
inner grooved pipe/φ7
0.272
2-7
Dimension 570×570×260mm
718×680×380mm
Noise level (H-M-L) 45/40/32
PVC 26/32
Remote
95
Weight (Net / Shipping) 18.5/23
Panel
Dimension 700×700×60mm
740×750×115mm
Weight (Net / Shipping) 3.5/4.5
Item Model AC122ACERA
Total power input
Max. power input
1.6
3×2.5
1, 220--230, 50
Running
Indoor unit
AC122ACERA(WHITE)
Fan
Centrifugal fan*2
1200/1080/880
0.09
750/650/550
Heat exchanger
inner grooved pipe/φ7
0.20
2-7
Dimension 1090×655×199
1150×750×300
PVC 18/20
Remote
Noise level (H-M-L) 46/44/42
Weight (Net / Shipping) 28.3/34.3
Model: AU122AEERA AB122ACERA
AC122ACERA AD122ALERA
7

Commercial Air Conditioner
8
Function cooling heating
Capacity kW 3.8(0.9--4.4) 4.1(1.0---4.8)
Sensible heat ratio 0.71
W 1260(280--1650) 1260(280--1650)
W 1650 1650
EER or COP W/W 3.02（B）3.25（C）
Dehumidifying capacity 10‐³×m³/h
Power cable
Power source N, V, Hz
A / A 6.0(1.4--8.0)A/8A 6.0(1.4--8.0)A/8A
Start Current A 3 3
Circuit breaker A 13 13
Unit model (color)
Type × Number
Speed(H-M-L) r/min
Fan motor output power kW
Air-flow(H-M-L) m³/h
Type / Diameter mm
Total Area m²
Temp. scope ℃
External （L×W×H）mm×mm×mm
Package （L×W×H）mm×mm×mm
Drainage pipe (material , I.D./O.D.) mm
Control type (Remote /wired)
dB(A)
kg / kg
Power cable
Power source N, V, Hz
Start Current A
Unit model (color)
Model / Manufacture
Type
Type × Number
Speed r/min
Fan motor output power kW
Air-flow(H-M-L) m³/h
Type / Diameter mm
Total area m²
Temp. scope ℃
External （L×W×H）mm×mm×mm
Package （L×W×H）mm×mm×mm
Refrigerant control method mm/mm
Noise level dB(A)
material of reduce noise
crankcase heater power W
kg / kg
Type / Charge g
Recharge quantity g/m
Liquid mm
Gas mm
Connecting Method
m
m
Item Model AD122ALERA
Total power input
Max. power input
1.6
3×2.5
1, 220--230, 50
Running
Indoor unit
AD122ALERA(GREY)
Fan
Centrifugal fan*1
1000/900/800±50
0.05
550/450/400
Heat exchanger
inner grooved pipe/φ7
0.11
2-7
Dimension 610×483×220
695×536×265
20/18
wired
Noise level (H-M-L) 35/32/30
Weight (Net / Shipping) 14/16
Item Mod
e
AU122AEERA
3×2.5
1, 220-230, 50
3
Outdoor unit
AU122AEERA（WHITE）
Compressor C-6RZ092H1A
twin rotary
Fan
axial*1
840r/min±50
0.06
2500/-/-
Heat exchanger
TP2M/Φ9.52
0.374
43-60
Dimension 775x640x245
901x341x712
Capillary tube: main φ3×φ1.8×920，assistant φ3×φ1.8×780
Defrosting auto
55
Type of Four way valve SHF-4-10A
XPE
37
Weight(Net / Shipping) 39/43
PIPING
Refrigerant R410A 1300
30
Pipe 6.35
12.7
flared
Between I.D &O. MAX.Drop 10
MAX.Piping length 20
Norminal condition: indoor temperature (cooling): 27℃DB/19℃WB, indoor temperature (heating): 20 ℃DB/14.5℃WB
Outdoor temperature(cooling): 35℃DB/24℃WB, outdoor temperature(heating): 7℃DB/6℃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.
Model: AU122AEERA AB122ACERA
AC122ACERA AD122ALERA

Commercial Air Conditioner
mounting-on-ceiling unit:
Note: ⊙is the real
time analyser
Norminal condition: indoor temperature (cooling): 27℃DB/19℃WB, indoor temperature (heating): 20℃DB
Outdoor temperature(cooling): 35℃DB/24℃WB, outdoor temperature(heating): 7℃DB/6℃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:
duct unit without auxiliary duct: duct unit with 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.
I
ns
t
a
ll
a
ti
on s
t
a
t
e:
th
e un
it
s
h
ou
ld
b
e p
l
ace
d
on
th
e
fl
a
t
fl
oor or
b
e moun
t
e
d
i
n
h
or
i
zon
t
a
l
direction.
Testing method:
built-in-ceiling unit:
1m
1m
1.4m
1.4m
2m
duct
auxiliary duct
2m
1.4m
1m
auxiliary duct
h
1m
1m
1m
1m
Model: AU122AEERA AB122ACERA
AC122ACERA AD122ALERA
9

3. Safety precaution
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!
CAUTION! Incorrect operations may result in injuries or machine damages; in some cases may
cause serious consequences.
Incorrect operations may result in severe consequences of death or serious injuries.
INSTRUCTIONS: These information can ensure the correct operation of the machine.
Be sure to conform with the following important Safety Cautions.
The Safety 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 exposed fan is very dangerous
which may 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 the unit needs maintenance and
repairment, please call dealer to handle it.
After the unit being used for a long time,
the base should be checked for any
damages.
If the damaged base is not repaired, the
unit may fall down and cause accidents.
Commercial Air Conditioner
Model: AU122AEERA AB122ACERA
AC122ACERA AD122ALERA
1000