Haier AU122AEERA, AB122ACERA, AC122ACERA, AD122ALERA Service 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

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

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

A C 12 2 A C E R A

Cooling / Heating capacity, 12=12000BTU/h

Commercial Air Conditioner

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

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

■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

heatin

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

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

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

Commercial Air Conditioner

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

AU122AEERA

3×2.5

1, 220-230, 50

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

Type of Four way valve

SHF-4-10A

XPE

Weight(Net / Shipping)

39/43

PIPING

Refrigerant

R410A 1300

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.

Installati

on state: the unit should be placed on the flat floor or be mounted in horizonta

direction. Testing method:

built-in-ceiling unit:

1.4m

duct

auxiliary duct

1.4m

auxiliary duct

Model: AU122AEERA AB122ACERA

AC122ACERA AD122ALERA

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

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 connected 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 removed or

Incorrect installation may cause water

leaking, electrical shock and fire hazard.

Nothing 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.

responsible for them.

reinstalled, dealer should be

Model: AU122AEERA AB122ACERA

AC122ACERA AD122ALERA

Commercial Air Conditioner

4. Net dimension

4.1 AB122ACERA

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240

100

900 990

655

200

880

620 605 600

40 35 35 30

199

4.2 AC122ACERA

Model: AU122AEERA AB122ACERA

AC122ACERA AD122ALERA

Commercial Air Conditioner

Model: AU122AEERA AB122ACERA

AC122ACERA AD122ALERA

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4.4 AU122AEERA

Commercial Air Conditioner

5. Installation Instructions

Note : (1) Fix the parts with screws

(2) Don't intake the strong wind directly to the outlet air-flow hole.

(3) A one meter distance should be kept from the unit top

(4) Don't block the surroundings of the unit with sundries

2. Selection of the place of installation

Accessories

"Edging" for protection of electric wires from an

opening edge.

Select the place of installation satisfying the following conditions and, at the

same time, obtain a consent from the client or user.

Edging

Place where air circulates. Place free from heat radiation from 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 snowfall 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 four sides are not suitable for installation. A 1m or more of overhead space is needed for the unit. Mount guide-louvers to place where short-circuit is a possibility. When installing several units, secure sufficient suction space to avoid short circuiting.

Wind direction

(2) Installation where the area with strong winds.

Install the unit so that the air outlet section of the unit must NOT be faced toward wind direction.

(1) Open space requirement around the unit

500

(Servicing space)

Air outlet

Air inlet

Case

Distance

Unit: mm

open

500

150

300

III

Model: AU122AEERA AB122ACERA

AC122ACERA AD122ALERA

Commercial Air Conditioner

(a) Concrete foundation

Anchor bolt

Concrete foundation

Unit

To fix by bolts

(b) Foundation anchor

Concrete foundation

Unit

Anchor bolt

5.1 Installation of outdoor unit

Fix the unit in a proper way according to the condition of a place where it is installed by referring to the following .

Install the unit so that the angle of inclination must be less than 3 degrees.

Model: AU122AEERA AB122ACERA

AC122ACERA AD122ALERA

Installation

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Commercial Air Conditioner

Model: AU122AEERA AB122ACERA

AC122ACERA AD122ALERA

Commercial Air Conditioner

Electric wiring

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 power supply and interconnecting wires.

Precautions for Electric wiring

Electric wiring work should be conducted only by authorized personnel. Do not connect more than three wires to the terminal block. Always use round type crimped terminal lugs with insulated grip on the ends of the wires. Use copper conductor only.

Select wire sizes and circuit protection from table below. (This table shows 20 m length wires with less than 2% voltage drop.)

WARNING!

30mA

Item

Model

Phase

Switch breaker

(A)

Circuit breaker

Overcurrent

protector

Power

source wire

size

Switch

break

Earth leakage breaker

Leak

curren

(2) Wiring connection

Make wiring to supply power to the outdoor unit, so that the power for the indoor

unit is supplied by terminals.

For the detailed wiring connection with the indoor units, see the corresponding

indoor operation and instruction manual.

WARNING!

INTERCONNECTING WIRES MUST BE WIRED ACCORDING TO FIG.1 INCORRECT WIRING MAY CAUSE EQUIPMENT DAMAGE.

Model: AU122AEERA AB122ACERA

AC122ACERA AD122ALERA

AU122AEERA

2.5

OUTDOOR UNIT TERMINAL BLOCK

1 2 3

To Indoor Unit

Y/G

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-_2a2ecn]b_h [h^ qilembij.2

-9. Ei hin m_n nb_ ohcn ch nb_ jf[]_ qb_l_ ^_mnlo]ncp_ a[m -mo]b [m

mof`olc] []c^ a[m. il joha_hn a[m -nbchh_l [h^ a[mifch_. ]ih]_hnl[n_m

[h^ l_n[chm2

-:. Pf[]_ mnliha _hioab ni mojjiln nb_ ohcn q_cabn2

-;. Ni _rj_hmcp_ [lnc]f_m mo]b [m n_f_pcmcih [h^ jc[hi \_fiq

ch^iil ohcn2

-<. Fhioab mj[]_ `il g[chn_h[h]_2

-=. Pf[]_ gil_ nb[h 5g [q[s `lig n_f_pcmcih [h^ l[^ci ni [pic^

^cmnol\cha n_f_pcmcih [h^ l[^ci2

-54. F[ms `il g[chn_h[h]_2

62Jhmn[ff[ncih Pl_j[l[ncih

-5. Pimcncih i` ]_cfcha ij_hcha \_nq__h ohcn [h^ momj_h^cha \ifn

-`lihn pc_q i` ohcn.2

-6. Pl_j[l_ [ff jcjcha -l_`lca_l[hn0q[n_l ^l[ch[a_ .[h^ qcl_m

-]ihh_]ncih qcl_ i` l_gin_ ]ihnliff_l0 ch^iil ohcn ]ihh_]ncih qcl_m.

ni nb_ ch^iil ohcn \_`il_ chmn[ff[ncih ch il^_l ni ]ihh_]n ch^iil ohcn cgg_^c[n_fs [`n_l chmn[ff[ncih2

Commercial Air Conditioner

5.2 Indoor unit ins

allation

Model: AU122AEERA AB122ACERA

AC122ACERA AD122ALERA

Distance between

suspending bolts 535mm

Indoor unit 570mm

Ceiling opening 650mm

Ornament panel 700mm

Indoor unit 570mm

Ceiling opening 650mm

Ornament panel 700mm

Air outlet

Air inlet

2.5m Over

1.5m

0.31m

Overlap between ceiling and ornament panel shall be 25mm

Suspending bolts

Ceiling

Ornament panel

150mm

320mm

60mm

5.2.1 AB122ACERA

-7. Jhmn[ff [ momj_h^cha \ifn

Ti mojjiln nb_ ohcn q_cabn 0[h]bil \ifn mbiof^ \_ om_^ ch nb_ ][m_ i` [fl_[^s _rcmnm ]_cfcha2 Giq h_q ]_cfcha0 om_ `fomb1ch nsj_ \ifn0 \ocfn1ch nsj_ \ifn il j[lnm jl_n[l_^ ch nb_ `c_f^2 C_`il_ aicha ih chmn[ffcha0 [^domn mj[]_ ni ]_cfcha2

72 Jhmn[ff[ncih i` ch^iil ohcn

Jh ][m_ i` hi ]_cfcha Jhmn[ff ohcn n_gjil[lcfs Pon momj_h^cha \l[]e_n ih nb_ momj_h^cha \ifn ni b[ha nb_ ohcn oj2 C_ mol_ ni om_ hon [h^ q[mb_l [n \inb _h^

i` nb_ \l_[e_n ni m_]ol_ `clgfs2

B`n_l chmn[ff[ncih ih nb_ ]_cfcha

-5. B^domn ohcn ni cnm lcabn jimcncih -R_`_l ni jl_j[l[ncih `il chmn[ff[ncih1-5..

-6.Db_]e nb[n ohcn cm biltihn[f2

Pon momj_h^cha \l[]e_n ih nb_ momj_h^cha \ifn ni b[ha nb_ ohcn oj2C_ mol_ ni om_ hon [h^ q[mb_l [n \inb _h^ i` nb_ \l[]e_n ni m_]ol_ cn `clgfs2

W[n_l jogj [h^ `fi[ncha mqcn]b cm chmn[ff_^ chmc^_ ch^iil ohcn0]b_]e `iol ]ilh_lm i` nb_ ohcn `il cnm f_p_l omcha bilctihn[f ]igj[l[nil il PVD no\_ qcnb q[n_l2-J` ohcn cm ncfncha [a[chmn nb_ ^cl_]ncih i` q[n_l ^l[ch[a_0jli\f_g g[s i]]ol ih `fi[ncha q[n_l f_[e[a_2.

Jh nb_ ][m_ i` ]_cfcha [fl_[^s _rcmnm

-5.Jhmn[ff ohcn n_gjil[ffs

-6.B^domn nb_ b_cabn [h^ jimcncih i` nb_ ohcn2

-7.Pli]__^ qcnb jli]_^ol_ -8. i` + Jh nb_ ][m_ i` hi ]_cfcha +

Non -Pl_j[l_ ch `_cf^.

W[mb_l -Pl_j[l_^ ch `_cf^.

Somj_h^cha \ifnm

G[mn_h -^io\f_ honm.

Jhm_ln

W[mb_l `crcha j[^

-jl_j[l_^ ch `_cf^.

X m_]ol_ nb_ q[mb_l `clgfsY

f_p_f_l

Pifsnb_h_ jcj_

D_cfcha

Rii`

Bh]bil \ifn

Liha hon il nbl_[^

Somj_h^cha \cfn M54

Nin_> Bff nb_ [\ip_ g_hncih_^ j[lnm mb[ff \_ jl_j[l_^ ch `_cf^0 nb_ ^c[g_n_l i` momj_h^cha \ifn cm M54

@Jhmn[ff[ncih Fr[gjf_A

Commercial Air Conditioner

Model: AU122AEERA AB122ACERA

AC122ACERA AD122ALERA

4. Installation of water drainage pipe

(1) Install water drainage pipe

Pipe diameter shall be equal or larger than that of connecting pipe (Pipe of polythene; size: 25mm; O.D.: 32mm )

Drainpipe should be short, with a downward slope at least 1/100 to prevent air bag from forming.

If downward slope of drainpipe cannot be made,lifting pipe shall be installed. Keep a distance of 1-1.5m between suspending bolts, to make water hose straight.

Commercial Air Conditioner

Model: AU122AEERA AB122ACERA

AC122ACERA AD122ALERA

Use the drainage hose and clip provided with unit. Insert water pipe into water plug until it reaches the white tape.

Tighten the clip until head of the screw is less than 4mm from hose. Wind the drainage hose to the clip using seal pad for heat insulation. Insulate drainage hose in the room.

5. Cautions for the water drainage lifting pipe

Installation height of water drainage lifting pipe shall be less than 280mm There should be a right angle with unit ,300mm from unit.

slope over 1/100

1-1.5m

Clip

Tape(white)

Draingage hose

Large size seal pad

4mm below

(accessory)

Clip

Water drainage lifting pipe

Suspending bracket

Drainage hose

280mm unter

500mm below

220mm

300mm below

1-1.5m

220

Drainage hose

75mm below

500mm below

< Note >

The slope of water drainage hose shall be within 75mm , make the drainage plug not to bear excessive force.

If several water hoses join together, of as per following procedures.

Specifications of the selected drainage hoses shall meet the requirements for the unit running

6. Installation of Ornament Panel

Install ornament panel on indoor unit (1) Check whether indoor unit is horizontal with leveler or polythene pipe filled with water , and

check that the dimension of the ceiling opening is correct. Take off the lever gauge before installing the ornament panel. (2) Fasten the screws to make the height difference between the two sides of indoor unit less than

5mm. (3) Firstly fix it with screws temporarily. (4) Fasten the two temporarily fixing screws and other two, and tighten the four screws. (5) Connect the wires of synchro-motor. (6) Connect the wire of signal.

(7) If no response of remote controller,check whether the wiring is correct,restart remote controller 10 seconds after shut off power supply.

Slope below 1/100

Connection drainage hose with a T-joint

100mm ¸over

Commercial Air Conditioner

Model: AU122AEERA AB122ACERA

AC122ACERA AD122ALERA

Panel limitation board installation (1)Install the panel board in the direction shown in the figure.

(2)The incorrect direction will result in water leakage,meanwhile swing and signal receiving are displayed that cannot be connected.

Electric control box

CAUTION!

INSTALLATION PROCEDURE

Install the room air conditioning unit as follows:

PREPARING INDOOR UNIT INSTALLATION

FIRST REMOVE THE INTAKE GRILL

A. FLOOR MOUNTING

(AC36/42 only suitable for exposed ceiling mounting)

1. DRILLING FOR PIPING

The piping and drain can exit the unit in two directions as shown below in (Fig. 2)

(Fig. 2)

The drain hose must be connected to the right side as shown in (Fig.3).

After the piping and drainage exit has been selected, drill a 7 cm dia. hole through the wall so that the hole is slanting downward toward the outside to ensure good drainage. When the pipe is led out from the rear, make a hole as Fig.4, at the position shown.

2. INSTALLING DRAIN HOSE

The drain hose must be connected to the right side of the unit (Fig.3) Insert the drain hose into the drain pan, then secure the drain hose with a nylon fastener. (Fig.5)

Be sure to arrange the drain hose correctly as shown in Fig. 7 so that it is lower than the drain hose connecting point of the indoor unit, if condensate pump is not fitted to system.

B. UNDER CEILING MOUNTING

Using the installation template, drill holes for piping and anchor bolts(for holes).(Fig.9)

1. DRILLING FOR PIPING

Select piping and drain directions. (Fig.10) Fig 10

(Fig. 6)

Drain pan

Drain hose

Insulation (Drain hose)

Arrange the drain hose lower than this portion.

Fig. 7

OK NO NO

Drain hose

rear

down

(Fig. 3)

Drain hose (Right side)

Wall

7cm

6mm

Indoor unit outdoor unit

(Fig. 4)

Drain pan

Drain hose

Nylon fastener (supplied by others)

(Fig. 5)

Drain hose

Rear (Install the drain hose in this direction.)

Wrap the insulation around the drain hose connection.(Fig.6)

Ensure that the unit is fixed level. Height ‘A’must be less than 5 mm.(Fig.8)

Commercial Air Conditioner

Model: AU122AEERA AB122ACERA

AC122ACERA AD122ALERA

(Fig. 10)

Installation template

Wall

Ceilling

Drilling position for piping

Drilling position for anchor bolt

200mm

900mm

5.2.2 AC122ACERA

16 21 28

381

232

26.5

2-R2.5

7.5

4-R5

381

232

26.5

2-R2.5

7.5

4-R5

Wall

6mm

12.5mm

Fig. 11

Fig. 12

Fig. 13

Spring washer

Special nut

Bracket

CAUTION

Hex bolt

8 to 13mm

Indoor unit

Fig. 14

Fig. 16

Remove the hole cover.

Arrange the drain hose lower than this portion

Drain hose

Fig. 15

Bolt

Bracket

Indoor unit

Install the drain hose at the rear; it should not be installed on the top or right side.

After the piping and drainage exit has been selected, drill 80mm and 50mm or 150mm dia. hole through the wall. So that the hole is slanting downward toward the outside for smooth water flow if a condensate pump is not fitted to system.

4. INSTALLING INDOOR UNIT

Reset the hex bolts as shown in Fig.14.

Apply the indoor unit to the brackets.(Fig.15)

Now, securely tighten the hex bolts in both sides.

5. INSTALL THE DRAIN HOSE

The drain hose will be connected to the right side.(Fig.3) Insert the drain hose into the drain pan, then secure the drain hose with a nylon fastener.(Fig.5) Wrap the insulation (drain hose)around the drain hose connection. (Fig.9) Be sure to arrange the drain hose correctly so that it is lower than the drain hose connecting port of the indoor unit (Fig.16) if condensate pump is not fitted to system.

Insert the anchor bolts into the drilled holes, and drive the pins completely into the anchor bolts with a hammer. (Fig. 12)

3. INSTALLING BRACKETS

Install the brackets with nuts, washers and spring washers.(Fig. 13)

2. DRILLING HOLES FOR ANCHOR BOLTS AND INSTALLING THE ANCHOR BOLTS

using a masonry drill, drill four 12.5 mm dia. Holes.(Fig.11)

Fig. 11

Commercial Air Conditioner

Model: AU122AEERA AB122ACERA

AC122ACERA AD122ALERA

Wiring

CAUTION

(1) Match the terminal block numbers and connection cable colours with those of the outdoor unit. Incorrect wiring may cause damage to the electrical parts.

(2) Connect the connection cables firmly to the terminal block. Incorrect installation may result in a fire.

(3) Always fasten the outside covering of the connection cable with the cable clamp.(If the insulation is chafed, a short curcuit may occur.)

(4) Always connect the earth wire.

Fig. 26

Electrical component box

Remove the four self tapping screws.

CAUTION

Do not remove the screws. If the screws are removed, the electrical component box will fall.

Fig. 25

Electrical component box

ELECTRICAL WIRING

1. INDOOR UNIT SIDE (1) Remove the electrical component box.

INDOOR UNIT SIDE

Commercial Air Conditioner

Model: AU122AEERA AB122ACERA

AC122ACERA AD122ALERA

Fig. 27

Electrical component box

Fig. 28

Base

Electrical component box cover

CAUTION

Be careful not to pinch the wiring between the electric component box and base.

(1) Ensure all wiring complies with current regulations.

(2) It is recommended that a MCB of the correct rating is used to protect the system.

(3) Always use a circuit breaker that can trip all the poles of the wiring is fitted and has an isolation distance of at least 3mm between the contacts of each pole.

WARNING

(2) Pull out the electrical component box.

ELECTRICAL WIRING

(3) Remove the electrical component box cover.

(4) Wiring

See wiring diagrams for indoor unit.

Remove the three tapping screws

CUSTOMER GUIDANCE

Explain the following to the customer in accordance with the operating manual: (1) Starting and stopping method, operation switching,

temperature adjustment, timer, air flow switching, and other remote control unit operations.

(2) Air filter removal and cleaning, and how to use air

louvres.

(3) Give the operating and installation manuals to the

customer.

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Commercial Air Conditioner

5.2.4 AD122ALERA

Model: AU122AEERA AB122ACERA

AC122ACERA AD122ALERA

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Commercial Air Conditioner

Model: AU122AEERA AB122ACERA

AC122ACERA AD122ALERA

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Commercial Air Conditioner

Model: AU122AEERA AB122ACERA

AC122ACERA AD122ALERA

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Commercial Air Conditioner

Model: AU122AEERA AB122ACERA

AC122ACERA AD122ALERA

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Commercial Air Conditioner

Model: AU122AEERA AB122ACERA

AC122ACERA AD122ALERA

t784=6

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6. Parts and Functions

Fig.1 Indoor Unit

Fig.2

POWER

OPER

TIMER

COMP

EMER

1 Operating Control Panel (Fig.2) 2 Emergency switch 3 Remote Control Signal Receiver 4 Power Indicator Lamp (Red) 5 OPERATION Indicator Lamp (Green) 6 TIMER Indicator Lamp (Yellow) 7 Compressor Run Lamp (Green) 8 Intake Grill 9 Air Filter

UP/DOWN Air Direction Flaps

RIGHT/LEFT Air Direction Louvers

(behind UP/DOWN Air Direction Flaps)

Fig.1

1110

6.1 AB122ACERA

6.2 AC122ALERA

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Commercial Air Conditioner

Model: AU122AEERA AB122ACERA

AC122ACERA AD122ALERA

Electrical components Case

Drain pan

Evaporator

Air outlet frame

6.3 AD122ALERA

6.4 AU122AEERA

Air inlet

Air outlet

Compressor

(Inside of unit)

Commercial Air Conditioner

Model: AU122AEERA AB122ACERA

AC122ACERA AD122ALERA

FQERH

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SIMEQ

RES

FILSEQ

HEALSH

QERES

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FAN

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CLOCK

CODE

LIGHS

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E V U Q

HEAS

7. Controller functions

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Commercial Air Conditioner

Model: AU122AEERA AB122ACERA

AC122ACERA AD122ALERA

Commercial Air Conditioner

8. Refrigerant circuit

main

capillary

assistant

capillary

one-way valve

condenser air-i nlet temp.

sensor Tci

cooling

heating

defrost

temp.

sensor

condenser

4-way

valve

check

valve

high pressure

switch

discharge

temp.

sensor

check

valve

2-way stop valve

(liquid side)

evaporator

indoor

coil

temp.

sensor

3-way stop

valve (air side)

compressor

muffle

low pressure

switch

outdoor

ambient

temp.

sensor

Tao

indoor

ambient

temp.

sensor

Tai

Model: AU122AEERA AB122ACERA

AC122ACERA AD122ALERA

9. Electrical Control Functions

9.1. Outdoor electric control functions

Commercial Air Conditioner

Model: AU122AEERA AB122ACERA

AC122ACERA AD122ALERA

System main functions

Definition of sensor sign: Tnh=indoor ambient temp., Twh=outdoor ambient temp., Tpg=indoor coil, Ttc=discharge, Tcs= outdoor coil, Txr=suction.

1.1 Outdoor running frequency and the control procedure

1.1.1 Outdoor running frequency control Outdoor running frequency range:

Compressor max. running frequency in cooling mode:

outdoor ambient temp. ~15 15~38 38~ Max. running frequency Hz(E) 60 100 80

Compressor min. running frequency in cooling mode:

outdoor ambient temp. ~38 38~ Min. running frequency Hz(E) 16 16

Compressor max. running frequency in heating mode:

outdoor ambient temp. ~0 0~15 15~ Max. running frequency Hz(E) 120 100 80

Compressor min. running frequency in heating mode:

outdoor ambient temp. ~10 10~ Min. running frequency Hz(E) 30 30

1.1.2 Compressor startup

When compressor startup for the first time, compressor running frequency must be stay at 60Hz(E) and 80Hz(E) for 1 minutes (At outdoor discharg temp. overhigh protection and compressor overcurrent protection, the frequency will be reduced), and then rise up to the target frequency. After the unit is in normal, the above procedure is not available.

1.2.3 Heating mode, cooling mode

After performing the compressor startup procedure, the unit will run according to the indoor frequency.

2 minutes later, the unit will compensate the running frequency due to the relative condition.

1.2.4 Compressor frequency rising/reducing speed

Rapid rising/reducing frequency speed 1----1Hz/second

Slow rising/reducing frequency speed 2----1Hz/10 seconds

Slow reducing frequency speed 3----2Hz/second

1.2 Outdoor motor control

Note: When the outdoor motor needs to change the class, there will be 45-second interval to avoid the fan speed changing frequently. 4 pulse for each circuit.

1.2.1 Fan motor speed class has 7 steps, the rotation and class is as follow:

Class-0 Class-1 Class-2 Class-3 Class-4 Class-5 Class-6 Class-7

Stop

250 400 550 650 850 900 950

1.2.2 Blowing remain heat after compressor shuts off

In cooling mode, when compressor shuts off, outdoor motor will enter speed Class-5 automatically, and will shut off after blowing remaining heat for 30 seconds.

1.2.3 Outdoor motor control in cooling/dry mode  Fan motor locked rotor: When fan motor is requested to work, if fan speed is measured to be below

50RPM and keep for 10 seconds, the compressor will stop, but 3 minutes later, it will re-start up again.

If within 10 minutes, the condition occurs 3 times, the unit will stop and alarm.  When compressor starts up, the unit will adjust automatically in 3 minutes according to the outdoor

Commercial Air Conditioner

Model: AU122AEERA AB122ACERA

AC122ACERA AD122ALERA

ambient temperature, and 3 minutes later, the unit will adjust according to the outdoor ambient temperature and compressor running frequency. Fan speed chart in 3 minutes after compressor starts up:

Ambient temp. ~10 10~25 25~ Cool Class-3 Class-5 Class-6 heat Class-6 Class-5 Class-3

Fan speed chart in 3 minutes after compressor runs due to the ambient temp. and compressor

frequency:

Compressor frequency in cooling F<40Hz

40Hz≤F<50Hz 50≤F

Over 28℃

Class-3 Class-5 Class-6

Twh

Below 28℃

Class-1 Class-3 Class-5

Compressor frequency in heating F<40Hz

40Hz≤F<50Hz 50≤F

Over 15℃

Class-1 Class-3 Class-4

Twh

Below 15℃

Class-3 Class-5 Class-6

● Low temp. cooling mode:

Outdoor temp. To To <0

0≤To <5 5≤To <10 10≤To <15

DC fan speed Class-1 Class-2 Class-3 Class-4

● Rated running mode:

Outdoor fan motor runs in class-7(DC motor) in rated mode.

1.2.4 Fan motor speed control when outdoor select inverter moter Select fan motor by SW4 on the outdoor small indicate board, ON means DC motor, OFF means

inverter motor.

Blowing remain heat function: In cooling mode, when compressor shuts off, outdoor motor will run in

low speed, and will shut off after 30 seconds.

Fan speed chart in 3 minutes after compressor starts up:

Ambient temp. ~15 15~25 25~ Cool Low speed High speed High speed Ambient temp. ~10 10~20 20~ heat High speed High speed Low speed

Fan speed chart in 3 minutes after compressor runs due to the ambient temp. and compressor

frequency:

Compressor frequency in cooling ~25 25~45 45~

Over 28℃

Low speed High speed High speed

Twh

Below 28℃

Low speed Low speed High speed

Compressor frequency in heating ~25 25~45 45~

Over 15℃

Low speed Low speed High speed

Twh

Below 15℃

Low speed High speed High speed

Remark: 1. There are 45 seconds delay when changing fan speed;

2. When in non-heating mode, if outdoor ambient temp. is lower than 15℃, the fan will run in low speed;

3. When in heating mode, if outdoor ambient temp. is lower than 20℃, the fan will run in low speed.

1.3 Outdoor electronic expansion valve (EEV) control

1.3.1 Movement of EEV Full-close, full-open, open angle upper limitation, open angle lower limitation, open/close valve speed.

Commercial Air Conditioner

Model: AU122AEERA AB122ACERA

AC122ACERA AD122ALERA

Initialize movement: 600 pulse close, then 50 pulse open, that is stop at 50 pulse at last; Full-open: 480 pulse open(E); Upper/lower

limitation of open angle: 480---50 pulse;

Driving speed: open direction: 30.3 PPS; close direction: 83.3 PPS; Electrify initialize movement: act as full-close; The movement of valve after compressor startup/shut off ; Compressor startup: the compressor will startup after the open angle of valve has reached the

fiducial open angle;

Compressor shut off: valve begin to full-close after the compressor has stopped.

1.3.2 Enter the fiducial open angle after compressor startup(no matter 2 minutes later or 2 minutes ago), 4 minutes later adjust automatically according to the target over-heat value, 10 minutes later begin to modify the over-heat value and open angle of valve. Cool Outdoor temp.

~22℃ 22℃~ Compressor frquency ~50 50~80 80~ ~50 50~80 80~ PMV open angle 230 220 240 260 250 280 Heat Outdoor temp.

~6℃ 6℃~ Compressor frquency ~50 50~80 80~ ~50 50~80 80~ PMV open angle 200 180 220 240 230 260

1.3.3 Confirmation of over-heat degree Standarded over-heat degree

Actual running Hz ~20 ~30 ~40 ~50 ~60 ~70 ~80 ~90 90~

Cool, dry 2 2 1 1 1 1 1 2 2 TXRH0

（℃）

heat 2 2 1 1 1 1 1 1 1 When discharging temp. Td is too high or too low, modify the EEV angle Mode Modification angle Max. modification Cooling

Ttc＞100℃, standarded over-heat degree -1 degree / 2 minutes 90℃< Ttc<100℃, keep the angle Ttc<90℃, +1 degree / 2 minutes, and plus to 0 degree gradually

Max. -5

Cooling

Ttc<35℃, standarded over-heat degree +1 degree / 2 minutes 35℃< Ttc<40℃, keep the angle Ttc＞40℃, -1 degree / 2 minutes, and reduce to 0 degree gradually

Max. +5

Heating

Ttc＞100℃, standarded over-heat degree -1 degree / 2 minutes 90℃< Ttc<100℃, keep the angle Ttc<90℃, +1 degree / 2 minutes, and plus to 0 degree gradually

Max. -5

Heating

Ttc<35℃, standarded over-heat degree +1 degree / 2 minutes 35℃< Ttc<40℃, keep the angle Ttc＞40℃, -1 degree / 2 minutes, and reduce to 0 degree gradually

Max. +5

1.4 4-way valve control

 The 4-way valve control in defrosting: refer to the defrosting procedure.  4-way valve control in other modes:

In heating mode, 4-way valve will open in 15 seconds after compressor starts up. When compressor not startup or in non-heating mode, 4-way valve will close to ensure the compressor has stopped for at least 2 minutes.

Commercial Air Conditioner

Model: AU122AEERA AB122ACERA

AC122ACERA AD122ALERA

1.5 Outdoor defrosting control

1.5.1 Enter condition

In heating mode, if the compressor has run for 10 minutes continuously and run for 45 minutes in all(clear the compressor

accumulative operation time when defrost over or enter cooling mode), the system

will measure the defrosting temp. sensor Tcs(check the frosting condition of outdoor heat exchanger) and outdoor ambient temp. sensor Ta, if the below condition can be met for continous 5 minutes, the unit will enter defrosting operation:

Tc s≤C×Ta －α

Herein: C: Ta＜0℃, C=0.8(E)

Ta≥0℃, C=0.6(E) Set α= 8 according to the data of EEPROM. Herein: when C×Ta －α exceed the range of -12℃≤C×Ta－α≤-6℃,

If C×Ta －α<-12℃, regard it as equal to -12℃; if C×Ta－α>-6℃, regard it as equal to -6℃.

1.5.2 Defrost interval time  When C×Ta －α＞-12℃, compressor defrost

accumulative operation time is 45 minutes;

 When C×Ta －α≤-12℃, compressor defrost

accumulative operation time is 45 minutes

1.5.3 Defrost operation

when defrost begins, compressor will stops for 1 minute, outdoor fan runs, after 50 seconds, 4-way

valve OFF.

Outdoor fan stops when compressor starts up, compressor running frequency must be stay at 60Hz

(E) for 1 minute, and then rise up to the target frequency 88Hz.

Compressor current and discharge protections are valid during defrost, when compressor stops because of protection or failure in defrost mode, resume after stopping for 3 minutes, accumulative operation time will not be cancelled. Enter defrost when the continuous operation time is met.

When enter defrost, quit defrost only when 2 minutes of the compressor min. operation time is met.

1.5.4 Quit condition

When any of the following condition is met, change defrost to heating mode.

(1): Outdoor heat exchanger temp. over 10℃ last for 60 senconds contineously;

(2): Outdoor heat exchanger temp. over 14℃ last for 30 senconds contineously;

(3): Defrost for 9 minutes contineously.

1.6 PTC output control

When outdoor unit is electrified, PTC output is 0, 3 seconds later, it is 1.

1.7 Heater control

When compressor stops and outdoor ambient temp. less than 26℃, heater will work, or stop it.

1.8 auto-checking function(pre-set)

Auto-checking function: When first short-circuit CJ601 then electrified, enter auto-checking. The process is as following: failure lamp LED001---PTC---4-way valve---heater---high speed---low speed--expansion valve(A—B—C—D)---LED lamp board(LED5—LED4—LED3—LED2—LED1—compulsory cooling—compulsory heating—DC fan motor—inverter fan motor)

Compulsory cooling when SW5-2 on LED lamp board is “ON”, LED5, LED4, LED3, LED2 and LED1 are all light, or all are black out.

Compulsory heating when SW5-1 on LED lamp board is “ON”, LED5, LED4, LED3 and LED2 are all light, LED1 is black out, or all are black out.

DC fan motor when SW5-4 on LED lamp board is “ON”, LED5, LED4, LED3 and LED1 are all light, LED2 is black out.

Inverter fan motor when SW5-4 on LED lamp board is “OFF”, LED5, LED4 and LED3 are light, LED2

Commercial Air Conditioner

Model: AU122AEERA AB122ACERA

AC122ACERA AD122ALERA

and LED1 are black out.

1.9 Time shorting function

Time shorting function: If the time shorting port is in short circuit after electrifying CJ601, the unit will

perform a 1/60 time shorting control.

1.10 Additional functions

1.10.1 The interval between compressor stop and startup again is 3 minutes, which can protection compressor. If being electrified for the first time, compressor will start up only when the valve opens to the normal operation angle.

1.10.2 Ttc high temperature protection Ttc discharg temp. over-heat protection can be executed once the unit is ON, but the discharge temp.

sensor can only alarm after the compressor has started up for 4 minutes.

If Ttc>=115 keeping for 10s, the discharge temp. over-heat protection excutes and unit stops,

resumable after quit the protection. If in 60 minutes the protection occurs for 3 times, the failure can be sent to indoor unit.

1.10.3 In heating indoor Tc high temperature protection Indoor heat exchanger temp. sensor will check the indoor coil temperature, if it is over 55℃, the unit

will reduce the compressor motor speed to perform the indoor heat exchanger temp. overhigh protection. If it is below 48℃, the unit will resume to be normal control.

P: reduce at the speed of 1Hz/10s

Q: remain the previous value

R: rise at the speed of 1Hz/10s

P reduce slowly 55℃ Q remaining 52℃ R rise slowly 48℃

1.10.4 Over current protection:

Discharging temp. Ttc

quick reduce FQY 2HZ/S

quick reduce FQY 1HZ/S

slow reduce FQY 1HZ/10S

keep FQY

slow rise FQY 1HZ/10S

114 ℃

111℃

108℃

105℃

95℃

90℃

Commercial Air Conditioner

Model: AU122AEERA AB122ACERA

AC122ACERA AD122ALERA

The compressor will stop and alarm if current exceed 11A for 3 seconds contineously during compressor startup, the compressor can re-start up after 3 minutes. but the compressor will stop and alarm and confirm the failure if it stop abnormally 3 times in 60 minutes, the system will work continued after been power-off.

Over current reducing frequency(FQY) protection

When current exceed (B)A, the compressor will reduce FQY at 1HZ/S, if current is less than (B)A and more than (B-1)A, stop reducing FOY and then rise FQY at 1HZ/10S, when current is less than (B-A)A, reaume to the target FQY. (B is setted in the EEPROM)

Compressor power protection

1) In dry and cooling mode, when compressor power over (a)W, the compressor will reduce FQY 1HZ/S, if compressor power over (b)W, the compressor will reduce FQY 0.1HZ/S, when compressor power over (c)W, rise the compressor FQY is forbidden, when compressor power over (d)W, the compressor will rise FQY 0.1HZ/S.

2) In heating mode, when compressor power over (a1)W, the compressor will reduce FQY 1HZ/S, if compressor power over (b1)W, the compressor will reduce FQY 0.1HZ/S, when compressor power over (c1)W, rise the compressor FQY is forbidden, when compressor power over (d1)W, the compressor will rise FQY 0.1HZ/S.

Remark: a, b, c, d and a1, b1,c1,d1 are written in EEPROM, can be adjusted according to different

system.

1.10.5 High, low pressure protection

High pressure protection: high pressure switch will not detect when in standby, detect after

compressor has started for 3 minutes.

Low pressure protection: low pressure switch will detect after compressor has started for 3 minutes,

and will shield during defrost or 6 minutes after defrost.

1.10.6 Sensor management: the detect time for sensor short-circuit or open-circuit is 4.5s, 3 minutes is needed for resume if failure is detected, the unit will work normally when the failure is cancelled.

Discharge temp. sensor will not detect if it short-circuit or open-circuit, detect when compressor has

started for 3 minutes.

When the AD value of all sensor is less than 3, regard as the outdoor temp. too low and all sensor

failtures will not alarm.

Outdoor add high temp. protection Te 62℃

quick reduce FQY 1HZ/S, when Te>=70℃, quick reduce FQY 1HZ/S, and stop the unit

if it lasts for 10 senconds

59℃ remaining

55℃

slow reduce FQY 1HZ/10S

1.10.7 Indoor heat exchanger anti-freezed protection Anti-freezed in cooling mode

Commercial Air Conditioner

Model: AU122AEERA AB122ACERA

AC122ACERA AD122ALERA

normal control 11℃ slow rise FQY 1HZ/10S

9℃

remaining

6℃

slow reduce FQY 1HZ/10S

1.10.8 Rated operation(the value can be setted by EEPROM)

● Rated cooling:

When receiving the indoor rated operation command, the unit will enter rated cooling operation.

● Rated cooling:

When receiving the indoor rated operation command, the unit will enter rated heating operation.

1.10.9 Outdoor compulsory operation(select by the outdoor dip switch)

● Compulsory heating operation

Dial SW1 of the outdoor small indicate board in ON state, set the heat exchanger temp. from indoor unit 16℃, each protection is available, FQY(20—120Hz), fan speed(inverter: high/middle/low; DC motor: class 1—7) and expansion valve(10—400) can be manual adjusted.

● Compulsory cooling operation

Dial SW2 of the outdoor small indicate board in ON state, set the heat exchanger temp. from indoor unit 16℃, each protection is available, FQY(20—120Hz), fan speed(inverter: high/middle/low; DC motor: class 1—7) and expansion valve(10—400) can be manual adjusted.

Note: the dip switches for compulsory cooling and compulsory heating can not be setted ON synchronously.

1.10.10 Failure code and troubleshooting The outdoor lamp will flash if there is failure, the flash FQY is 1HZ, the flash time is according to the

following table, the lamp will off for 3 seconds after one flash circuit, meanwhile, the lamps on LED board will light in 5-bit binary system(light is 1, LED1-LED5 from low bit to high bit).

Alarm lamp is always light when there is no failure.

1.10.11 Special funtions

1) Power operation When receiving the Power operation signal from indoor, the unit will operate as the set frequency by

EEPROM. Fan speed will depend on the ambient temperature and the frequency. When the Power signal is cancelled by indoor, the Power operation will stop.

2) Soft operation When receiving the Soft operation signal from indoor, the unit will operate as the set frequency by

EEPROM. Fan speed will depend on the ambient temperature and the frequency. When the Soft signal is cancelled by indoor, the Soft operation will stop.

3) Time shorting operation After receiving the time shorting signal, the unit will perform the 1/60 time shorting operation.

4) Compulsory cooling/heating operation Controlled by the buttons on the outdoor small board, only indoor heat exchanger protection is invalid,

all the other protections are valid.

Commercial Air Conditioner

Model: AU122AEERA AB122ACERA

AC122ACERA AD122ALERA

Trouble description

Display of

LED borad

LED 5-4-3-2-1

Analyze and diagnose

Flash times of LED on mainborad

01111

Eeprom failure 01110 Outdoor main board eeprom fail 14

IPM failure 00001 IPM failure 1

Compressor U-phase over-current

00101 The current of compressor U-phase is too high 32

Communication error between main board and spdu module

10110 Communication fail over 4min 22

High pressure protection 01000 System high pressure over 4.5Mpa 8

Module over-voltage protection (only for ISPM)

11010 Send from ISPM module 26

Compressor start-up abnormal 10001 Compressor start-up abnormal 17

Compressor discharging temprerture protection

00100

Compressor discharging tempreature over 120 centigrade

Abnormal of DC moter 00010 Jam of DC motor or motor failure 2

Abnormal of piping sensor 00111

Piping sensor short-circuit or open-circuit last 60 sec

Abnormal of Compressor suction sensor

10101

Compressor suction sensor short-circuit or open-circuit last 60 sec

Abnormal of outdoor ambient sensor

00110

Outdoor ambient sensor short-circuit or open-circuit last 60 sec

Abnormal of compressor discharge sensor

01001

Compressor discharge sensor short-circuit or open-circuit last 60 sec

Spdu / IPM module over current protection

00101 Current of spdu / ISPM module over limit 5

Communication error between indoor and outdoor unit

00011 Communication fail over 4min 3

Compressor V-phase over-current

00101 The current of compressor V-phase is too high 33

Compressor W-phase over-current

00101 The current of compressor W-phase is too high 34

Compressor jam(only for spdu) Inner compressor is abnormal jamed 15

Compressor phase loss 11110 U/V/W loss 30

Module lack-voltage protection (only for ISPM)

11011 Send from ISPM module 27

Module PWM select circuit error 01011 Module PWM select wrong circuit 11

Detect PFC over-current

01100

The current of PFC circuit is too high

Compressor parameter error 10010

Wrong compressor parameter is selected in the Eeprom

SPDU Communication error 10110 Communication error send from SPDU 22

Circuit error detected by current 10011 Circuit damage detected by the current 19

PFC voltage abnormal 11111 Voltage of PFC circuit is abnormal 31

Module error 01101 Module error 13

The power supply is not the 50Hz

01010 The power supply is not the 50Hz 10

Condenser air inlet temp. sensor failure

11001

Condenser air inlet temp. sensor short-circuit or open-circuit last 60 sec

Low pressure protection 11000 System low pressure under 0.05Mpa 24

4-way valve reverse failure 11100

Alarm and stop if detect Td-Tci<=25 last for 1min after compressor has started for 10min in heating mode, confirm the failure if it appears 3 times in one hour.

Lack off refrigerant or discharge side dirty

11101

Alarm and stop if detect Td-Tci>=25 last for 1min after compressor has started for 10min in cooling mode, confirm the failure if it appears 3 times in one hour

High

Mid

Low

High

ΔT

1.General features

1.1 Control mode: remotr or wired control + connecting port of long-distance control + passive

port switch control.

1.2 Temperature control: 16-30℃;

1.3 Precise of temperature control: ±1℃;

1.4 Indoor fan speed: AUTO, HIGH, MIDDLE, LOW (no AUTO when in FAN mode);

1.5 Swing control: the swing are controlled by the synchronous motor, main control board receive usable signal and set in swing mode or remain in other mode;

1.6 running mode: AUTO , COOL, DRY, FAN and HEAT;

1.7 Healthy function: 5VDC UV generator, 12VDC negrative ion generator - high voltage collecting-dirt, 220VAC negrative ion generator – oxygen pump;

1.8 Filter up-down control: adopt double-direction synchronous motor;

1.9 Auxiliary electric heating function: 12VDC control signal, 220VAC control signal or control switch;

1.10 Fresh air control: 12VDC DC motor,220VAC AC control port output;

1.11 CLOCK setting, TIMER ON, OFF, ON/OFF and SLEEP fuction (only TIMER function is viable and temperature variety is unviable when running the SLEEP function in FAN mode);

1.12 Drain system function: Water level inspection and water pump control

1.13 Compulsory cooling operation;

1.14 Safety and protection devices: 3-minute protection for compressor startup, freeze protection device, overheat protection device, temperature cutoff protection, sensor failure, drainage, pressure, communication etc. protection.

1.15 Indoor ambient temperature, indoor and outdoor coil temperature inspection.

1.16 start current control: the outdoor fan start after compressor running 2s in normal situation.

2. LED function:

The LED for remote control type includes POWER, TIMER, COMPRESSOR, WATER PUMP; the POWER LED also indicate failure; 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. POWER LED flashes when there are system failure, the flash times ti indicate the failure code.

3. Indoor AUTO FAN control

a) If the unit enters AUTO FAN for the first time, when ΔT＞2, select high speed; whenΔT≤

0, select low speed; or it will select med speed; when thermostat is OFF, fan will be low speed. (the conversion temperature difference is 1 degree).

b) If the present fan speed is AUTO

HIGH, whenΔT＜2, fan speed will change to AUTO MED.

c) If the present fan speed is AUTO

MED, whenΔT＜0, fan speed will change to AUTO LOW; whenΔT ＞ 3, fan speed will change to

AUTO HIGH.

d) If the present fan speed is AUTO LOW, whenΔT＞1, fan speed will chenge to AUTO MED. e) Fan speed conversion in AUTO FAN mode: the conversion will delay for 3 minutes from HIGH to

LOW, and no delay from LOW to HIGH.

f) When the fan speed is HIGH/LOW/MED, on the condition that the protection does not act, the unit

will run at the set fan speed; when the protection acts, for the sake of the normal operation, the fan speed will be forced to conversion; in Dry mode, fan motor will be changed as request.

4. AUTO mode control

4.1 When entering AUTO for the first time, the unit will select the running mode due to the below

Commercial Air Conditioner

Model: AU122AEERA AB122ACERA

AC122ACERA AD122ALERA

AB122ACERA AC122ACERA AD122ALERA electric control function:

conditions, then perform the selected mode.

Tr≥Ts -3℃ select COOL mode (includes FAN mode) Tr＜Ts -3℃ select HEAT or FAN mode

4.2 After entering the AUTO mode, the mode can change over among COOL, HEAT or FAN modes according to the indoor ambient temperature (conversion temperature difference is ±3℃).

4.3 If the unit is in COOL mode, when it arrives compressor-stop temperature, the compressor will stop; after compressor stops for 15 minutes, the unit will check the room temperature, if Tr＜Ts -3 ℃ , the unit will enter HEAT or FAN mode, or the unit will still be in COOL mode;

4.4 For the heat pump unit, if the unit is in HEAT mode at present, when it arrives

compressor-stop temperature, the compressor will stop; after the compressor stops for 15 minutes, the unit will check the room temperature, if Tr＞Ts+ 3℃, the unit will enter COOL mode, or it will still be in HEAT mode.

4.5 For cooling only unit, if the unit is at FAN mode, if Tr＞Ts + 3℃, the unit will enter COOL mode.

4.6 When the unit is in HEAT mode, if indoor heat exchanger temperature rises up to over 63℃,

the unit will change into COOL mode. And within 1 hour, the heat exchanger temperature will not be limited, the heating operation will stop temporarily. 1 hour later, the unit will select the proper mode due to the above condition.

5. COOL mode control

5.1 4-way valve being powered off, compressor run/stop will depends on the temperature difference between the room temperature and the set temperature.

5.2 In cooling mode, every time the compressor starts up, within 6 minutes, the compressor will not be limited by the temperature sensor, but the set temperature change, shutoff signal and protection action will not be limited by 6-minute protection, and the compressor can stop immediately.

5.3 ΔT≥1 compressor will run; ΔT≤-1 compressor will stop;

-1<ΔT<1 compressor will stay in original state

5.4 Anti-freezed protection (invalid in compulsory operation,

trial running, heating mode)

When the unit has run for over 6 minutes after compressor

starts up, if indoor coil temperature Tg<1℃, the compressor and the outdoor motor will stop, and the unit will change to FAN mode; 9 minutes later after compressor stops and when indoor coil temperature rises to 10℃, the unit will resume to COOL mode, the compressor and the outdoor motor will run again.

5.5 Outdoor fan control: (realized by outdoor when with outdoor conmmunication function)

if the temp. of indoor coil sensor Tg<6℃, control the outdoor fan by the temp. of outdoor coil

sensor;

if the temp. of outdoor defrost sensor Tc<34℃, the outdoor fan will be OFF and lasted 45s at least; if the temp. of outdoor defrost sensor Tc＞44℃, the outdoor fan will be ON; if the temp. of outdoor defrost sensor 34℃≤Tc≤44℃, the outdoor fan will remain in the original

state.

5.6 Temperature cutoff protection

In cooling mode, the unit will check indoor coil temperature every time the compressor has run for 1

minutes, when indoor coil temperature Tg>Tr＋5, the unit will stop and 3 minutes later restart up; if the temperature cutoff occurs for 3 times continuously, the unit will stop and alarm.

6. DRY mode control

6.1 When the uint enters DRY mode for the first time, the compressor, outdoor motor and indoor

motor will perform according to the below conditions:

Ts +3 ℃

Ts -3 ℃

cooling

heating/blowing

cooling

Te mp .

heating/blowing

run

stop

－1

run

stop

ΔT

Commercial Air Conditioner

Model: AU122AEERA AB122ACERA

AC122ACERA AD122ALERA

ΔT＞2, the compressor and the outdoor motor will run continuously, indoor motor will run at the set speed, this area is defined as Area A; 0≤ΔT≤2, the compressor and the outdoor motor will always run for 10 minutes and then stop for 6 minutes, indoor motor will be LOW speed, this area is defined as Area B; ΔT＜0, the compressor and the outdoor motor will stop, indoor motor will run at Low speed, this area is defined as Area C.

6.2 After the unit is running in DRY mode, the system will

change over among Area A, Area B, and Area C (the conversion temperature difference ±1℃) If the system is in Area A, when ΔT＜1, change to Area B; If the system is in Area C, when ΔT>1, change to Area B; If the system is in Area B, when ΔT>3, change to Area A; WhenΔT＜－1, change to Area C.

6.3 Anti-freezed protection (invalid in compulsory operation,

trial running, heating mode)

When the unit has run for over 6 minutes after compressor

6.4 Outdoor fan control: (realized by outdoor when with outdoor conmmunication function)

if the temp. of indoor coil sensor Tg<6℃, control the outdoor fan by the temp. of outdoor coil

sensor;

state.

6.5 Temperature cutoff protection

In cooling mode, the unit will check indoor coil temperature every time the compressor has run for 1

minutes, when indoor coil temperature Tg>Tr＋5, the unit will stop and 3 minutes later restart up; if the temperature cutoff occurs for 3 times continuously, the unit will stop and alarm.

7. HEAT mode control

7.1 4-way valve control: in heating mode, compressor startup----4-way valve being electrified 10

seconds ahead; compressor running----4-way valve retains original state; compressor shutoff----4-way valve being powered off 2 minutes and 50 seconds later (except for defrosting, 4-way valve being electrified 5 seconds ahead, and being powered off 55 seconds later).

7.2 In heating mode, for everytime the compressor startup (thermostat ON), within 6 minutes, the

4-way valve will not be limited by the temperature sensor, but for the set temperature change, shutoff signal and the protection, the compressor can stop immediately without 6-minute limitation.

7.3 ΔT≥1 compressor running, indoor motor runs at anti-cold air mode; ΔT≤-1 compressor stops, indoor motor runs at blowing remaining heat mode;

-1<ΔT<1 compressor retains original state

7.4 Overheat protection (for the unit with outdoor PCB, the outdoor motor is controlled by outdoor unit,

but the compressor is still controlled by indoor unit, and their temperature points will not be accordant completely)

In heating mode, compressor has started up and indoor motor has run for over 30 seconds, if

indoor coil temperature Tg>60℃, outdoor motor will stop; if Tg<56℃, and outdoor motor has stop for 45s, outdoor motor will run again; if Tg>73℃, the compressor will stop and indoor motor will run according to the thermostat state. After the compressor stops for 3 minutes and Tg reduces to 48℃, the unit will resume to heating mode, and the compressor and the outdoor motor will run again.

7.5 Temperature cutoff protection

In heating mode (besides the defrosting), the unit will check indoor coil temperature every time the

compressor has run for 1 minutes, when indoor coil temperature Tg＜Tr-5, the unit will stop and 3 minutes later restart up; if the temperature cutoff occurs for 3 times continuously, the unit will stop and

－1

ΔT

Commercial Air Conditioner

Model: AU122AEERA AB122ACERA

AC122ACERA AD122ALERA

alarm.

7.6 Anti-cold air function in heating mode

After entering heating mode, or last defrosting is over, the compressor will start up, if Tg＜28℃,

indoor motor will stop; if 38℃>Tg≥28℃, indoor motor will run at low speed; if Tg≥38℃ or the compressor has run for over 4 minutes, indoor motor will run at the set speed; once the motor has started up, it will not stop because of Tg reduction.

7.7 Blowing remaining heat function

In heating mode, the thermostat is OFF, the compressor stops, indoor motor will run at low speed

until Tg＜28℃ and has run for 50 seconds at least.

Note: in heating mode, “the compressor stops----indoor motor delays to stop” adjust if the pipe blows remaining heat; “the compressor startup----indoor motor delays to start up” adjust if the pipe is anti-cold air; in other conditions, the compressor and the indoor motor are allowable not to be in company. In cooling mode, the motor will run according to the control, not together with the compressor.

7.8 Defrosting function in heating mode In defrosting and when the compressor resumes to run for 3 minutes after defrosting is over, the unit will not adjust the sensor failure.

7.8.1 Manual defrost: In heating mode, the set temperature 30℃ and in high speed, in 5 seconds, press SLEEP button 6 times continuously, then the buzzer will sound 3 times, you can enter the manual defrosting. At this moment, the unit will not adjust the enter condition of defrost and begin to defrost function directly, whose procedure is as the same as the auto defrost; the quit condition is that the defrosting time is up to 5 minutes.

7.8.2 Auto defrost enter condition: a) the compressor has run for 45 minutes continuously or for 75 minutes in all and has run for over 10 minutes continuously. b) the compressor and outdoor fan running normally. c) the temp. of indoor coil sensor lower than 45℃, d) the defrosting temp. lower

than –8 ℃ (use the defrosting start signal from outdoor in the condition of with outdoor communication ).

7.8.3 Auto defrost quit condition: The defrosting temp. over 14℃ or the defrosting time is over 12 minutes (use the defrosting end signal from outdoor in the condition of with outdoor communication )

7.8.4 Defrost process : a) enter defrosting mode, the compressor, outdoor and indoor fan motor stops;

b) 55 seconds later, 4-way valve will be reverse, after more 5 sensonds, compressor begins to run; c)

defrosting is over, compressor stops, outdoor fan running at high speed; d) 55 seconds later, 4-way

valve runs and compressor starts up. The indoor fan motor will run at anti-cold air condition.

7.8.5 For the unit with auxiliary electric heating function: a. If the auxiliary electric heating function is working when the defrosting condition is met, please

stop electric heater firstly, 20 seconds later, defrosting can begin;

b. After defrosting, the unit will adjust the working state of electric heater according to the setting

before defrosting.

7.9 Auxiliary electric heating function (valid in heating mode or heating state in AUTO mode) Enter condition: 1) ΔT>1; 2) Thermostat ON and running for 1 minute; 3) Tr<26℃; 4) Indoor motor running; 5) Electric heating function start signal available (cancelled); 6) The system working in heating mode or in heating state of AUTO mode; 7) Tg<48℃

If the above conditions can all be met, the electric heating function will work. Quit condition: 1) ΔT≤1; 2) Thermostat OFF; 3) Tr>26℃; 4) Indoor motor stops; 5) Electric heating function start signal not available (cancelled); 6) The system in non-heating operation; 7) Tg>52℃

If one of the above conditions can be met, the electric heater will stop.

8. FAN mode control

The compressor and the outdoor motor will stop running, indoor motor can be set at high/med/low speed, the fan blade can swing or stay at one position. In this mode, you can set the TIMER and SLEEP function.

9. CLOCK setting and TIMER function

The unit can set 24-hour TIMER ON/OFF, and the min. unit is 1 minute, after being set, the timer lamp of indoor will be on, and after the timer is over, the timer lamp will be off. TIMER ON: RUN LED is off, compressor LED is off, and TIMER LED is on, the unit is in stop state.

Commercial Air Conditioner

Model: AU122AEERA AB122ACERA

AC122ACERA AD122ALERA

When timer is over, the unit begins to run, and the timer LED is off. The unit operation begins from receiving the timer signal for the last time. The SLEEP function only can be set before the TIMER ON begins. TIMER OFF: the unit running, the timer LED on, while the timer is over, timer LED off, the unit will stop, the sleep can be set, the sleep time will replace the original time of TIMER ON/OFF. TIMER ON/OFF set at the same time: when the timer on/off is set, the timer LED will be off; the SLEEP function can be set, the sleep time will replace the original time of TIMER ON/OFF.

10 SLEEP function (energy saving function at night)

101 Standard sleep function: in cooling or dry mode, after running at SLEEP mode for 1 hour, the set temperature will rise 1℃, another 1 hour later, the set temperature will rise

another 1℃; the unit continues running for 6 hours, then the unit will stop.

10.2 Standard sleep function: in heating mode, after running at SLEEP mode for 1 hour, the set temperature reduces 2℃, another 1 hour later, the set temperature will

reduce 2℃, and another 3 hours later, the set temperature rises 1℃; the unit continues running for 3 hours, then the unit will stop.

10.3 Non-standard SLEEP function: the sleep function

can realize 1~8 hours sleep mode when being combined with the TIMER function.

1） When in Auto mode, the unit will make SLEEP operation due to the setting.

2） After setting SLEEP function, the clock can not be adjusted.

3） If sleep time is no more than 8 hours, when the time arrives, the unit wil shut off.

4） If sleep function is set after setting TIMER OFF function, the unit will execute as the SLEEP

function.

5） If SLEEP function is set, the TIMER function can not be set.

6） If sleep function is set after setting TIMER ON function, the sleep function only can be set

befroe the TIMER ON time arrives.

7） After setting sleep function, press CLOCK button to check the clock; press TEMP button to

display the set temperature, and press again to change the set temperature.

11 Water level inspection and water pump control

1) In COOL (including cooling state of AUTO mode and the compulsory cooling) and DRY mode, as long as the compressor runs, water pump will work; and once the compressor stops, water pump will stop 5 minutes later;

2) In standby state of cooling mode, heating mode and fan mode (including auto fan mode), after

water tank is full, the float switch will disconnect, if the controller detects this signal for 2 seconds, the water pump will begin to work. After the float resets, water pump will continue working and stops 5 minutes later;

3) If the water-full signal is detected for over 5 minutes, the compressor will stop; water pump will

work for 5 minutes and stop for 5 minutes, then repeat as a cycle, until the float resets, the water pump will stop 5 minutes later; if water pump has repeated for 4 cycles, the float can not reset, and the unit will alarm water drainage abnormal. And the water pump will continue the cycle.

12. System protection

12.1 3-minute protection for compressor startup After the compressor stops, at least 3 minutes later, the compressor can restart up; the compressor can restart up. Being electrifed for the first time, there is 3-minute delay protection.

12.2 Time shorting function If the time shorting port is in short circuit, the unit will perform a 1/60 time shorting control.

12.3 High pressure protection

After compressor is running for 3 minutes, the unit will check the pipe pressure, when the pipe

pressure is too high, 30 seconds later, compressor and outdoor fan motor will stop, and then 3

minutes later, the unit will be normal. Within 30 minutes, if the compressor stops and will send

failure because of too high pressure for 3 times.

12.4 Low pressure protection

Ts +1

Ts +2

Ts -2

Ts -3

Ts -4

Commercial Air Conditioner

Model: AU122AEERA AB122ACERA

AC122ACERA AD122ALERA

After compressor is running for 3 minutes, the unit will check the pipe pressure, when the pipe pressure is too low and low pressure switch is running for 30 senconds, compressor and outdoor fan motor will stop and will send failure

13. Trouble code

The remote receiver, wired controller and indoor PCB indicator all can indicate the failure code.

Remote

control

indoor

PCB flash

times

Wired

controll

display

Central controll

display

Fault description Possible cause Remedy

10 08(08H) 21D

Fault in drain system

Float switch is open 25m or longer

due to the signal, resumable

1 01(01H) 01D

Indoor ambient temp. sensor failure

sensor broken down or short circuit for more than 2m continuously

due to the signal, resumable

2 02(02H) 02D

Indoor pipe temp. sensor failure

sensor broken down or short circuit for more than 2m continuously

due to the signal, resumable

3 74(4AH) 11D

Outdoor ambient temp. sensor failure

sensor broken down or short circuit for more than 2m continuously

due to the signal, resumable

4 73(49H) 12D

Outdoor pipe temp. sensor failure

sensor broken down or short circuit for more than 2m continuously

due to the signal, resumable

5 72(48H) 10D

Overcurrent Detector CT current is above

the limit 3 times within 30m.

Need to be checked, reset

6 83(53H) 14D

High pressure malfunction

High pressure switch acts for 3 times in 30m

Need to be checked, reset

7 71(47H) 22D

Power failure

Wrong phase, phase failure or loss

Need to be checked, reset

8 07(07H) 06D

Communication failure between wired controller and indoor unit

communication abnormal for more than 4m continuously

due to the signal, resumable

9 06(06H) 05D

Communication failure between indoor and outdoor units

communication abnormal for more than 4m continuously

due to the signal, resumable

11 11( 0BH) 30D

External alarm signal input

External alarm is cut out for 10s or longer

due to the signal, resumable

12 03(03H) 20D

Fault in coil/suction line temp. sensor

sensor broken down or short circuit for more than 2m continuously

due to the signal, resumable

13 13(0DH) 31D

Temperature shut-off

Directional valve malfunction repeats 3 times

Need to be checked, reset

14 76(4CH) 15D

Fault in discharging temp. sensor

sensor broken down or short circuit for more than 2m continuously

due to the signal, resumable

15 05(05H) 17D

EEPROM error

EEPROM data loss Default

operation

16 84(54H) 26D

Low pressure malfunction

low pressure switch is activated

Need to be checked, reset

17 80(50H) 15D

Compressor overheat

Detected temperature of

discharge line is higher than 120℃

Resrorable when lower than 100℃

18 12(0CH) 23D

Fault in operation mode

Indoor units operate in

different modes

Resrorable in same o

peration

mode

19 75(4BH) 18D Outdoor coil

B(suction sensor-multi)

sensor broken down or short circuit for more than 2m continuously

due to the signal, resumable

20 77(4DH 15D Outdoor

sensor broken down or short due to the signal,

Commercial Air Conditioner

Model: AU122AEERA AB122ACERA

AC122ACERA AD122ALERA

) discharge B (oil

temp. sensor-multi)

circuit for more than 2m continuously

resumable

21 20(32D) 07D

Module failure Module overheat, overcurrent,

short-circuit

due to the signal, resumable

22 36(54D) 08D

Fault in zero-load

Current sensor failure or

compressor is not started

due to the signal, resumable

14 Jumper selection (√shows jumper connected, ON; ×shows jumper disconnected, OFF; * shows no limitation)

J1 J2 J3 J4 Wired control/ infrared control

√/×

* * *

Temp. compensation available/not available

√/×

* *

With/no outdoor PCB * *

√/×

Cooling only/heat pump * * *

√/×

J5 J6 Time shorting switch

√/×

* * *

Forced or not *

√/×

* *

Ornarment or not * *

×/√

Oxygen or not * * *

×/√

J7 J8 J9 J10 Other/2P convertible

√/×

* * *

single split/ multi split *

√/×

* *

Indoor unit address 0/other

* *

√/×

2P convertible /single blade

* * *

√/×

15. Network address selection (√shows jumper connected, ON; ×shows jumper disconnected, OFF)

SW1 SW2 address 1 2 3 4 1 2 3 4 1

× × × × × × ×

√ × × × × × ×

× √ × × × × ×

√ √ × × × × ×

× shows

passive port

switch

control AND

× × √ × × × ×

√ × √ × × × ×

……

…… …… …… …… …… ……

126

√ × √ √ √ √ √

127

× √ √ √ √ √ √

128

√ √ √ √ √ √ √

√ showes

passive port

switch

control – the

later

entering in

priority

Commercial Air Conditioner

Model: AU122AEERA AB122ACERA

AC122ACERA AD122ALERA

Commercial Air Conditioner

CIRCUIT DIAGRAM OF INDOOR UNIT

0010576546

(FREEZE) CN8

SW2

P13

(HUMI)

(PUMP)

(HEAT)

(L)

(FRESH)

P8 P9

P12

P10

P11

(COMM)

(N')

(M)

(H)

SW3

P17

(L')

P14

P15

SW5

SW4

P16

CN4

CN17

CN5

MOTOR

FILTER

CN1

TRANS.

SWITCH

(DOOR)

(CONTROLLER)

(FLOAT)

CN15

CN13

(UP-DOWN)

(12V/ALM)

CN14

(ALARM)

CN16

(REMOTE)

CN11

CN12

FLOAT

REMOTE

RECEIVER

REMOTE

CN2

CN1

MC1

COM

MC2

1234

CN19

CN20

W:WHITE B:BLACK R:RED Y:YELLOW OR:ORANGE BL:BLUE BR:BROWN Y/G:YELLOW/GREEN TRANS.:TRANSFORMER

CONTROLLER

CENTRALIZED

RBLBBW

FUSE T2.0A/250VAC

(RECEIVE BOARD)

(SWING)

(OXYGEN)

SWING

MOTOR

FAN

MOTOR

CN21

CN7

FUSE

T6.3A/250VAC

T3.15A/250VAC

P4(N2)

POWER SUPPLY

P5(N3)

TO OUTDOOR UNIT

BLNY/G

WRBWB

Y/G

P1(L)

P2(N)

P3(N1)

FAN CAP.

Y/G

MOTOR

SWING

PUMP

P6(N4)

SW1

(ROOM/PIPE)

CN6

TEMP. SENSOR

SENSOR

PIPING TEMP.

ROOM

1234

6. IN AC242ACBEA/AC242ACEAA, DASHED LINES MARKED @

CONNECTED

TO "1 , 2" ON TERMINAL BLOCK, AND THERE ARE NO

LINES BETWEEN "1 AND L" , "2 AND N".

IN *******BIA OR ******ERA TYPE,THE POWER SUPPLY COME FROM OUTDOOR UNIT,

AND THE FUSE TYPE IS T3.15A/250VAC

7.ABOUT THE TERMINAL BLOCK,MARK "BL" IS EQUAL "B" AND THE "BR" IS EQUAL "W".REFER TO OPERATION MANUAL TO SET SW1-SW5

NOTE:

1. PARTS 1 2 3 ARE NOT AVAILABLE

2. PARTS 4 5 6 ARE OPTIONAL, AND THE LINE MARKED 13 ONLY AVAILABLE IN CONVERTIBLE TYPE

3. PART 7 NOT AVAILABLE IN DUCT TYPE

4. PARTS AND CONNECTED WIRES IN DASHED FRAME 8 ONLY FOR AB14/182ACBEA

5.PARTS AND CONNECTED WIRES IN DASHED FRAME 9 10 ARE NOT AVAILABLE IN AD14/182AMBEA, AND IN

CONVERTIBLE TYPE,

CORRESPONDINGLY THERE IS A CLIP ON PCB.

PARTS AND

CONNECTED

WIRES IN DASHED FRAME 11 ONLY FOR

AC142/182/242ACBEA/AC

242ACEAA

TYPE .PARTS AND

CONNECTED

WIRES IN DASHED FRAME 12 DETERMINED BY

PRODUCTS TYPE.

WIRED CONTROLLER

10. Electric data

Model: AU122AEERA AB122ACERA

AC122ACERA AD122ALERA

AB122ACERA

CIRCUIT DIAGRAM OF INDOOR UNIT

0010576979

FUSE1

CN1

CN15

CN20

LOW

MID

HIGH

CN21

CN22

TRANS.-I

CN4

SIGNAL

LED3

CN3

CN2

T3.15A/250VAC

CN13

TRANS.-II

CN12

CN11

REMOTE

CN10

FLOAT

CN8

ALARM

CN7

RECEVIER

CN6

STEPMOTOR

PIPE ROOM

CN14

CONTROLLER

CN16

CN17

CN18

PUMP

WIRED CONTROLLER

ROOM TEMP. SENSOR

PIPING

TEMP.

SENSOR

RECEIVE BOARD

FLOAT SWITCH

REMOTE CENTRALIZED CONTROLLER

PUMP MOTOR

TRANSFORMER

BM4

1234

ON 12

1234

ON 1234

BM3

BM2

BM1

STEP MOTOR

Y/G

R Y BL W

BBW

Y/G

NOTE:

1.THE PARTS IN DASHED FRAME ARE OPTIONAL

REFER TO OPERATION MANUAL TO SET

BM3 AND BM4

3.USER SHOULD NOT TO SET BM1 AND BM2 W:WHITE B:BLACK BR:BROWN BL:BLUE R:RED Y:YELLOW Y/G:YELLOW/GREEN TEMP.:TEMPERATURE

LED2

LED1

Y/G

TO OUTDOOR UNITPOWER SUPPLY

Itophome

MOTOR CAPACITOR

FAN MOTOR

Y/G

CN4

CN15

CN17

CN20

CN21

CN22

CN6

CN7

CN8

CN10

CN11

CN12

CN13

CN14

LED1

LED2

BM2

BM1

BM3

BM4

CN19

CN16

CN3

CN1

CN2

CN18

0010452325E for AB122ACERA

Commercial Air Conditioner

Model: AU122AEERA AB122ACERA

AC122ACERA AD122ALERA

CN12

CN15

CN16

CN11

CN17

LED1

CN14

CN13

CN20

SW3

SW2

CN21SW5

SW4

CN19

CN7

LED4

LED5

CN5

CN4

P10

P12

P11

P15

P14

P13

P17

CN1

P16

CN8

CN6

SW1

0010451690E for AC122ACERA and AD122ALERA

Commercial Air Conditioner

Model: AU122AEERA AB122ACERA

AC122ACERA AD122ALERA

Commercial Air Conditioner

REACT

CAP

ACIT

OR BOARD

LX1

NOTES:

1.DASHED P

AR TS

ARE JUST

CAN SELECT

ONE BETWEEN

THIS TWO F

AN MOT

2.P AR TS IN DASHED FRAMES

ARE OPTIONAL

3. THE LED1-5 ON LED BOARD ARE USED FOR ERROR ALARM

4.PLEASE DO NOT

PRESS SW1-4 IN DASHED FRAME

5.PLEASE DO NOT

CHANG THE DIP

SWITCH ON LED BOARD

CONDENSER INLET

TEMP

. SENSOR

DEFROST

TEMP.SENSOR

LOW PRESSURE

SWITCH

AMBIENT

TEMP. SENSOR

HIGH PRESSURE

SWITCH

EEV

CN3

CN18

CN16

CN17

CN8

CN10

CN6

CN7

SW3

SW1

SW2

CN5

CN15

SW4

CN1

T O INDOOR UNIT

P6 P5

COM

Ground

MAIN BOARD

CN13

CN1

CN12

Y/G

WIRING DIAGRAM OF OUTDOOR UNIT

0150501661

4-W

A Y

V AL

COMPRESSOR DISCHARGE SENSOR

COMPRESSOR SUCTION SENSOR

LED BOARD

LED3

LED4

LED5

LED1

LED2

AC F

AN MOT

DC F

AN MOT

SPDU

L(IN)

N(IN)

CN5

B:BLACK

BL:BLUE

W :WHITE

R:RED

Y/G:YELLOW/GREEN

TEMP

.:TEMPERA

TURE

CN2

Y/G

CN3

S(W)

COMPRESSOR

LX2

CON24

CON22

CN20

CON21

CON23

P(OUT+)

N(OUT

C(T)

OR:ORANGE

CRANKCASE

HEA

TER

T25A

/250V

FUSE101

AU122AEERA

Model: AU122AEERA AB122ACERA

AC122ACERA AD122ALERA

Commercial Air Conditioner Model: AU242AGERA AB242ACERA

AC242ACERA AD242ALERA AD242AMERA

CN16

CN1

CN2

CN19

CN20

CN18

CN17

CN24

LED001

CN5 CN6

CN7 CN10

CN8

CN11 CN3

SW3 SW2

SW1

CN12

CN15

CN13

SW4

Ou tdoor PCB 0151800037

Commercial Air Conditioner

10.3 Sensor characteristic

Model Name Code Sub-part code characteristic

Outdoor

ambient temp.

sensor

0010450192 001A3800082

R25=10KΩ±2.5%

B25/50=4200K±3%

Compressor

sunction sensor

001A3900062 /

R25=10KΩ±3%

B25/50=3700K±3%

Outdoor defrost

sensor

0010450194 001A3800093

R25=10KΩ±3%

B25/50=3700K±3%

Compressor

discharge

sensor

0010450196 001A3800096

R80=50KΩ±3%

B25/80=4450K±3%

AU122AEERA

Condenser inlet

temp. sensor

0010451307 001A3800093

R25=10KΩ±3%

B25/50=3700K±3%

Indoor ambient

temp. sensor

001A3900005 001A3900003

R25=23KΩ±2.5%

B25/50=4200K±3%

AB122ACERA

AC122ACERA

Indoor coil

temp. sensor

001A3900006

001A3900004

R25=10KΩ±3%

B25/50=3700K±3%

Indoor ambient

temp. sensor

0010451323

001A3900003

R25=23KΩ±2.5%

B25/50=4200K±3%

AD122ALERA

Indoor coil

temp. sensor

001A3900006

001A3900004

R25=10KΩ±3%

B25/50=3700K±3%

Model: AU122AEERA AB122ACERA

AC122ACERA AD122ALERA

Commercial Air Conditioner

T(℃)

Rnom(KΩ)

T(℃)

Rnom(KΩ)

-20℃

90.79 24 10.43 68 2.09

-20℃

281.34

24℃

24.12

-19 85.72 25 10 69 2.03

-19℃

263.56

25℃

-18 80.96 26 9.59 70 1.96

-18℃

247.04

26℃

21.94

-17 76.51 27 9.21 71 1.9

-17℃

231.66

27℃

20.94

-16 72.33 28 8.84 72 1.85

-16℃

217.35

28℃

19.99

-15 68.41 29 8.48 73 1.79

-15℃

204.02

29℃

19.09

-14 64.73 30 8.15 74 1.73

-14℃

191.61

30℃

18.23

-13 61.27 31 7.83 75 1.68

-13℃

180.04

31℃

17.42

-12 58.02 32 7.52 76 1.63

-12℃

169.24

32℃

16.65

-11 54.97 33 7.23 77 1.58

-11℃

159.17

33℃

15.92

-10 52.1 34 6.95 78 1.54

-10℃

149.77

34℃

15.22

-9 49.4 35 6.68 79 1.49

-9℃

140.99

35℃

14.56

-8 46.86 36 5.43 80 1.45

-8℃

132.78

36℃

13.93

-7 44.46 37 5.6

-7℃

125.11

37℃

13.34

-6 42.21 38 5.59

-6℃

117.93

38℃

12.77

-5 40.08 39 5.73

-5℃

111.22

39℃

12.23

-4 38.08 40 5.52

-4℃

104.93

40℃

11.71

-3 36.19 41 5.32

-3℃

99.04

41℃

11.22

-2 34.41 42 5.12

-2℃

93.52

42℃

10.76

-1 32.73 43 4.93

-1℃

88.35

43℃

10.31

0 31.14 44 4.9

0℃

83.5

44℃

9.89

1 29.64 45 4.58

1℃

78.94

45℃

9.49

2 28.22 46 4.42

2℃

74.67

46℃

9.1

3 26.4 47 4.26

3℃

70.65

47℃

8.74

4 25.61 48 4.11

4℃

66.88

48℃

8.39

5 24.41 49 3.97

5℃

63.33

49℃

8.05

6 23.27 50 3.83

6℃

50℃

7.73

7 22.2 51 3.7

7℃

56.86

51℃

7.43

8 21.18 52 3.57

8℃

53.91

52℃

7.14

9 20.21 53 3.45

9℃

51.13

53℃

6.86

10 19.3 54 3.33

10℃

48.51

54℃

6.6

11 18.43 55 3.22

11℃

46.04

55℃

6.34

12 17.61 56 3.11

12℃

43.72

56℃

6.1

13 16.83 57 3.11

13℃

41.52

57℃

5.87

14 16.09 58 2.9

14℃

39.45

58℃

5.65

15 15.38 59 2.81

15℃

37.5

59℃

5.44

16 14.71 60 2.72

16℃

35.66

60℃

5.24

17 14.08 61 2.63

17℃

33.92

18 13.48 62 2.54

18℃

32.27

19 12.9 63 2.49

19℃

30.72

20 12.36 64 2.38

20℃

29.25

21 11.84 65 2.3

21℃

27.86

22 11.34 66 2.23

22℃

26.54

23 10.87 67 2.16

23℃

25.3

R25=10KΩ±3% B25/50=3700K±3%

R25=23KΩ±2.5% B25/50=4200K±3%

Model: AU122AEERA AB122ACERA

AC122ACERA AD122ALERA

Commercial Air Conditioner

T(℃)

Rnom(KΩ)

-30 11600 13 933.4 56 127.3

-29 10860 14 886.4 57 122.1

-28 10170 15 841.9 58 117.2

-27 9529 16 800 59 112.5

-26 8932 17 760.8 60 108

-25 8375 18 722.8 61 103.8

-24 7856 19 687.3 62 99.68

-23 7372 20 653.8

-22 6920 21 622

-21 6498 22 592

-20 6104 23 553.6

-19 5736 24 536.6

-18 5392 25 511.1

-17 5071 26 486.9

-16 4770 27 464

-15 4488 28 442.3

-14 4225 29 421.7

-13 3978 30 402.1

-12 3747 31 383.6

-11 3531 32 366

-10 3328 33 349.3

-9 3138 34 333.5

-8 2960 35 318.4

-7 2793 36 304.1

-6 2636 37 290.5

-5 2489 38 277.6

-4 2351 39 265.3

-3 2221 40 253.6

-2 2099 41 242.5

-1 1984 42 232

0 1877 43 221.9

1 1775 44 212.3

2 1680 45 203.2

3 1590 46 194.5

4 1506 47 186.3

5 1426 48 178.4

6 1351 49 170.9

7 1280 50 163.7

8 1214 51 155.9

9 1151 52 150.4

10 1092 53 144.2

11 1036 54 138.3

12 983.2 55 132.7

R80=50KΩ±3% B25/80=4450K±3%

Model: AU122AEERA AB122ACERA

AC122ACERA AD122ALERA

11. Troubleshooting

Commercial Air Conditioner

Model: AU122AEERA AB122ACERA

AC122ACERA AD122ALERA

yes

if the refrigerant is normal

improve the ventilation condition

stop the unit, restart up until power module temperature has reduced

yes

if compressor wiring is

correct

yes

if compressor winding is normal, and the each phase resistor is in balance

compressor can not start up

wiring correctly

replace compressor

Alarm condition: ambient temperature sensor is in short circuit or open circuit

if sensor is fixed

well

Relocate

reconnect

check if the wiring is

correct according to

wiring diagram

Is sensor short-circuit or open-circuit?

Replace sensor

Is sensor resistance acceptable?

Replace sensor

yes

1) Sensor failure

Replace PCB

Check if the power normal

outdoor indicator indicate the above failure

check if the any current among compressor input port U-V-W is over high

check if the system is blocked

yes

check if module bottom temperature is over high, more than 90degree

if ventilation beside the module radiator is good

yes

compressor startup procedure is abnormal, and vibrates seriously

2) Outdoor power module failure The following troubleshooting is available for: a. IPM failure(00001) b. Compressor U-phase,V-phase and W-phase over-current(00101), total unit over-current(00101) c. Compressor start-up abnormal(10001), Compressor jam(01111), Compressor phase loss(11110), Module lack-voltage protection(11011), Detect PFC over-current(01100), PFC voltage abnormal(11111)

yes

if the total load is too big

adjust the power supply as 220-230VAC, 50Hz

if the total unit

operate normally

replace the module

Commercial Air Conditioner

Model: AU122AEERA AB122ACERA

AC122ACERA AD122ALERA

yes

Alarm condition: outdoor DC motor is blocked rotor or broken, abnormal.

outdoor indicator LED indicate DC motor abnormal

3) Outdoor DC motor abnormal

adjust fan blade to make it run normally

adjust lead wire of fan motor

yes

Check if the lead wire of DC motor is broken or short-connected

Check if the outdoor unit fan blade is blocked by some objects

Replace motor

Warning: For outdoor DC fan motor, forbidden to pull off the plug when being electrified.

4) Communication error between indoor and outdoor units

indoor unit troubleshooting

check if the failure is eliminated

yes

compressor can not startup after unit is switched on for 4 minutes, indoor failure indicator flashes 9 times

check if wiring between indoor and outdoor is correct, power supply is 50Hz

if indoor unit alarms other failure codes

check if the indoor PCB worked normally

yes

eliminate other faults

adjust wiring and power supply, note not connect the outdoor connecting port 1/2 wrong

Replace outdoor PCB

check the indoor wires, confirm the normal operation of indoor PCB

yes

5) Compressor discharging temperature protection Alarm condition: Within one hour after compressor is running, compressor discharging temperature is

over 115degree for 3 times continously.

adjust piping

replace sensor

yes

replace PCB

yes

check if discharging temp. sensor resistance is normal

check if refrigerant is too much or too less

check if the system piping is blocked

adjust refrigerant

yes

outdoor indicator indicate the above failure

Commercial Air Conditioner

Model: AU122AEERA AB122ACERA

AC122ACERA AD122ALERA

if high pressure switch is normal

check if the refrigerant is too much or less by the pressure gauge

yes

outdoor failure indicator indicate high pressure failure

check if the wiring between indoor and outdoor is correct

outdoor indicator shows power faliure

check if power supply is normal

yes

adjust power supply as 50HZ

，

220-230VAC

EEPROM data is missing, replace PCB

check if EEPROM welded points on outdoor PCB is in good condition

outdoor indicator shows the above failures

yes

adjust EEPROM welded point

outdoor indicator shows the above failures

replace the outdoor module

when compressor starting up, unit stops abnormally and can not start up normally

yes

6) Outdoor high pressure protection Alarm condition: When compressor running, high pressure is over 4.5 MPa for 30 seconds continously

check if the piping is blocked

yes

adjust refrigerant

adjust piping

yes

replace sensor

7) Outdoor power supply is abnormal Alarm condition: if power supply is not 50Hz as standard, which will affect the normal communication and

cause air conditioner bad operation.

adjust wiring

8) EEPROM failure(01110), Compressor parameter error(10010) Alarm condition: EEPROM is fault or data is missing

9) Circuit error detected by current(10011), Module error(01101), Module PWM select circuit error(01011) Alarm condition: when compressor is running, the unit will be abnormal or stop

Replace the outdoor PCB

yes

Commercial Air Conditioner

Model: AU122AEERA AB122ACERA

AC122ACERA AD122ALERA

measure actual pressure by a pressure gauge to adjust the output failure

Lack of refrigerant, charge additional refrigerant and check if piping leaks, if yes, replace piping

check if high pressure is low,too

yes

check if piping is blocked

dredge piping

yes

replace pressure switch

low pressure abnormal

yes

check if the wiring between outdoor PCB and module is correct

compressor not start up, outdoor alarms, check if there is other failure

outdoor indicator flashes 22 times

yes

eliminate other failures

replace PCB

yes

if problem is solved

outdoor indicator flashes 24 times

adjust wiring

replace module

Alarm condition: outdoor system pressure is lower than 0.05MPa

yes

refrigerant charging amount is not appropriate, recharging or remove some refrigerant

yes

repair 4-way valve

relpace outdoor PCB

check if the direction of 4-way valve is correct

clean indoor/outdoor heat exchanger

check if indoor evaporator or outdoot condenser is too dirty

yes

check if the 4-way valve

port of PCB output 230V

check if outdoor pressure is normal

yes

outdoor failure lamp indicates 28

(12) 4-way valve reversing failure, systerm lack of refrigerant or discharging side dirty and blocked

Alarm condition: alarm and stop the unit when Td-Tci<=25 and lasts for 1 minute after the compressor has started for 10 minutes check in heating mode, confirm the failure if it occurs 3 times in 1 hour

(13) systerm lack of refrigerant or discharging side dirty and blocked

Alarm condition: alarm and stop the unit when Td-Tci>=25 and lasts for 1 minute after the compressor

has started for 10 minutes in cooling mode, confirm the failure if it occurs 3 times in 1 hour

outdoor failure lamp indicates 29

check if outdoor pressure is normal

refrigerant charging amount is not appropriate, recharging or remove some refrigerant

yes

check if indoor evaporator or outdoot condenser is too dirty

yes

clean indoor/outdoor heat exchanger

10) Communication failure between outdoor PCB and module

11) Outdoor low pressure abnormal

Commercial Air Conditioner

12. Noise level

Noise level-AD122ALERA

1317212529333741454953

31. 5

100

125

160

200

250

315

400

500

630

800

1000

1250

1600

2000

2500

3150

4000

5000

6300

8000

10000

12500

160000

20000

Third octave band frequency Hz

Sound pressure level DB

heating low

heating middle

heating high

super heating high

cooling low

cooling middle

cooling high

super cooling high

fan low

fan middle

fan high

super fan high

Noise level-AB122ACERA

1014182226303438424650

1. 5

Third octave band frequency Hz

Sound pressure level DB

heating low

heating middle

heating high

cooling low

cooling middle

cooling high

fan low

fan middle

fan high

Model: AU122AEERA AB122ACERA

AC122ACERA AD122ALERA

Commercial Air Conditioner

Noise level-AU122AEERA

111519232731353943475155596367

1.5

000

250

600

000

500

150

000

300

000

0000

2500

60000

0000

Third octave band frequency Hz

Sound pressure level DB

heating low

heating middle

heating high

cooling low

cooling middle

cooling high

fan low

fan middle

fan high

Noise level-AC122ACERA

1014182226303438424650

Third octave band frequency Hz

Sound pressure level DB

heating low

heating middle

heating high

cooling low

cooling middle

cooling high

fan low

fan middle

fan high

Model: AU122AEERA AB122ACERA

AC122ACERA AD122ALERA

Commercial Air Conditioner

Sincere Forever

Haier Group

Haier Industrial Park, No.1, Haier Road

266101, Qingdao, China

http://www.haier.com

Model: AU122AEERA AB122ACERA

AC122ACERA AD122ALERA

Haier AU122AEERA, AB122ACERA, AC122ACERA, AD122ALERA Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual