LUV INVERTER SERIES - Aircon Experts | Air Conditioning … A… · · 2016-04-04LUV INVERTER...

LUV INVERTER SERIES

Self-diagnostics and Trouble-shooting

42/38LUV028H

42/38LUV035H

42/38LUV052H

42/38LUV065H

42/38LUV070H

42/38LUV080H

Part 2 of 2

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Som

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-use

d R

-T d

ata

for

T1,

T2,

T3

and

T4

sens

or:

Tem

per

atu

re (℃

) 5

10

15

20

25

30

40

50

60

Res

ista

nce

Val

ue

(KΩ

) 26

.9

20.7

16

.1

12.6

10

8

5.2

3.5

2.4

Tem

per

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15

25

35

60

70

80

90

100

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020406080100

120

140

160

180

200

05

1015

2025

3035

4045

50

KΩ

℃

Te

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2 ta

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bel

ow.

INTE

LLIG

ENT

POW

ER M

OD

ULE

[IPM

] CH

ECK

ING

LUV HIGHWALL INVERTER ADVANCED DIAGNOSTICS

38LUV028/35H [Compressor DA108X1C-23EZ]

MAIN PCB

Main Chip IRMCK341

Indicator LED1

Colour Blue

Function Indicates chip status

Action Meaning Flashing slow [0.5Hz] Standby Energised [steady] Normal Flashing fast [2.5Hz] System error

38LUV052 [Compressor DA130S1C-20FZ]

MAIN PCB

Main Chip [TMP86P807NG]

Indicator LED 1

Colour Yellow


Power [+5V DC]

Indicator LED 4

Colour Red

Function Indicates DC volts

341 Chip [Sensorless motor control IC for appliances]

Indicators LED 5 LED 6

Colour Red Green


Red LED Green LED Meaning Indoor Code

Off On Standby mode None

On Off Normal operation None

Off Flash IGBT over current protection P0

On On DC voltage upper or lower limit exceeded P1

Flash On Chip engine error P1

Flash Off Chip engine start error P4

On Flash Chip engine phase missing P4

Flash Flash Communication error P4

Action Meaning

Flashing slow [0.5Hz] Standby

Energised [steady] Normal operation

Flashing fast [2.5Hz] System error

Action Meaning

Energised [steady] DC power

Off No power

See table below

38LUV052H-1 [Compressor DA130M1C-31FZ]

MAIN PCB

Main Chip TMP86FH09ANG

Indicator LED 2

Colour Yellow


Power +5V DC

Indicator LED 1

Colour Red

Function Indicates DC volts present

341 Chip Sensorless motor control IC for appliances


Colour Red Green






On On DC voltage upper or lower limit P1 or P10 or P11 or P12

Flash Off Compressor speed out of control P4 or P46

On Flash Chip engine phase missing P4 or P43 or P44 or P45

Flash Flash Communication error P4 or P40

Flash On Chip 341 – EPROM error E5

Action Meaning




Action Meaning

Energised [steady] DC power normal

Off No power

See table below

38LUV065/70H [Compressor DA150S1C-20FZ]

MAIN PCB

Main Chip TMP86P807NG

Indicator LED 1

Colour Yellow


Power +5V DC

Indicator LED 4

Colour Red

Function Indicates DC volts

341 Chip Sensorless motor control IC for appliances


Colour Red Green






On On DC voltage upper or lower limit exceeded P1

Flash On Chip engine error P1

Flash Off Chip engine start error P4

On Flash Chip engine phase missing P4


Action Meaning




Action Meaning

Energised [steady] DC power

Off No power

See table below

38LUV080H [Compressor DA250S2C-30MT]

MAIN PCB

Main Chip TMP86FH46NG

Indicator LED 1

Colour Yellow


Power +5V DC

Indicator LED 2

Colour Red

Function Indicates DC volts present

IPM PCB

Intelligent Power Module

Indicator LED 1 LED 2 LED 3

Colour Red Green Red

Function Indicates status [see below] DC Power

Red LED 1 Green LED 2 Red LED 3 Meaning I/dr. Code

On Off

Off

No

pow

er Standby mode None

Off On Normal operation None

Flash Off IGBT current protection P0

On On DC voltage limit exceeded P1

Off Flash

On

Pow

er n

orm

al

[+3.

3V D

C] Compressor speed control P4

Flash On Chip engine phase missing P4


On On Reserved for future use None

Action Meaning




Action Meaning

Energised [steady] DC power normal

Off No power

LUV Generation 2

TROUBLE SHOOTING

INDOOR UNITS

Indoor Unit Error Display

Display LED STATUS

E0 EEPROM parameter error

E1 Indoor / outdoor units communication protection

E2 Zero-crossing signal error

E3 Indoor fan speed has been out of control

E5 Open circuit or short circuit of outdoor temperature sensor or outdoor unit

EEPROM parameter error

E6 Open circuit or short circuit of room or evaporator temperature sensor

P0 IPM malfunction or IGBT over-strong current protection

P1 Over voltage or too low voltage protection

P2 Temperature protection of compressor top.

P4 Inverter compressor drive error

Note: E4 & P3: Reserved function.

Diagnosis and Solution

1. EEPROM parameter error diagnosis and solution

If the EEPROM chip

is welded on PCB,

replace the PCB

directly. Otherwise,

check whether the

EEPROM chip

plugged in PCB well?

Yes

No

Yes

Correct the connection.

Replace the indoor PCB.

Shut off the power supply and

turn it on 5 seconds later. Is it

still displaying the error code?

2. Indoor unit and outdoor unit communication protection error diagnosis and solution

Yes

Yes

Measure Vs, is it moving alternately

between positive value and negative

value?

(Vs is the voltage between S and N of

outdoor unit.)

Yes

Power off, then turn on the unit 5 seconds

later(reconnect the power wire).Is the error

still displaying after several minutes?

No

Yes

Change the outdoor Main PCB.

Power on. Is the error extinguished?

Check all the wirings between indoor and

outdoor, indoor PCB and outdoor PCB

following the wiring diagram. Are all the

wirings connected correctly?

Is the wiring to the indoor PCB

connected correctly?

Change the indoor PCB.

Yes

Change the outdoor main PCB.

No

Is the wiring to the outdoor PCB

connected correctly?

Power on. Is the error extinguished?

Change the outdoor main PCB.

No

3. Indoor fan speed has been out of control diagnosis and solution

Shut off the power supply

and turn it on 5 seconds

later.Is it still displaying

the error code?

S h u t o f f t h e p o w e r

supply, rotate the cross

fan by hand. Does it

rotate properly?

The unit operates normally.

Disassembly the

connection between

fan and motor, check if

the bearing is normal?

Replace the bearing.

Check the wires of

fan motor. Are all the

connections good?

No

Yes

No No

Replace indoor fan motor.

Yes

Correct the connections.No

No

Yes

Yes

Check the resistance value of

indoor fan motor, is it normal?

Replace indoor PCB.

Yes

4. Open circuit or short circuit of temperature sensor diagnosis and solution

Check the connections

between temperature

sensor and PCB. Are

the connections good?

Correct the connections.No

Yes

Yes Replace indoor or outdoor PCB.

Replace the sensor and

c h e c k i f t h e p r o b l e m

happen again?

Check the resistance value

of the sensor via table1

and table 2, is it normal?

No

5. IPM malfunction or IGBT over-strong current protection diagnosis and solution

Check if the wiring between

module PCB and compressor

connected correctly.

Correct the connection.No

Yes

IPM continuity check. Check if the IPM

terminal resistance values are uniform. Replace the module PCB.No

Check if the IPM installed correctly.

Yes

Correct the installation, tighten the

screws and apply silicon grease.No

Check if the outdoor fan

can run properly.

Yes

NoCorrect the connection of fan motor

or replace the fan motor.

Yes

Replace outdoor control PCB.

Does the problem still remain?

Replace the compressor.

Yes

6. Over voltage or too low voltage protection diagnosis and solution

Check if the power

supply is normal.

C h e c k i f a l l t h e

connections are good.

Disconnect the unit with power supply and try to

restart the unit when power supply gets normal.No

Yes

No Correct the connections.

Yes

Check if the voltage between

P and N is around DC 320V.


No

7. High temperature protection of compressor top diagnosis and solution

Check if the air flow system

of indoor and outdoor units

are obstructed?

Clear up the air inlet and outlet or the heat

exchanger of indoor and outdoor units.Yes

No

Yes

Yes

Turn off the power supply and turn

it on 10 minutes later.

Check if the unit can

start normally.No

Check if the refrigerant

charge volume is normal?

Recharge the correct

refrigerant volume.

Refrigerant system is blocked, such

as capillary or welded point of pipes.

Yes

Check if all the connection, especially

the connection of OLP (Over Load

Protector) sensor is good.

Correct the connection.No

Measure the resistance

between the two ports of

the OLP. Is it zero?

Yes

Replace the OLP.No

Replace the outdoor control PCB.Yes

No

8. Inverter compressor drive error diagnosis and solution

Check all the wires between control

PCB, module PCB and compressor. Correct the connections.No

IPM continuity check. Check if the IPM

terminal resistance values are uniform.

Yes

Replace outdoor module PCB.No

Yes


Does the problem remain?

Replace the compressor.

Yes

9. Zero crossing detection error diagnosis and solution

Check if the connections and

power supply is normal?

Correct the connections. Turn on the

unit when the power supply is good.No

Yes

Indoor PCB is defective.

Replace indoor PCB.

Safety

Electricity power is still kept in capacitors even the power supply is shut off. Do not forget to discharge the electricity power in

capacitor.

Electrolytic Capacitors

(HIGH VOLTAGE! CAUTION!)

Connect discharge resistance (approx.100Ω 40W) or soldering iron (plug) between +, - terminals of the electrolytic capacitor on the

contrary side of the outdoor PCB.

Note: The picture above is only for reference. The plug of your side may be different.

Main parts check

1. Temperature sensor checking

Disconnect the temperature sensor from PCB, measure the resistance value with a tester.

Temperature Sensors.

Room temp.(T1) sensor,

Indoor coil temp.(T2) sensor,

Outdoor coil temp.(T3) sensor,

Outdoor ambient temp.(T4) sensor,

Compressor discharge temp.(T5) sensor.

Measure the resistance value of each winding by using the multi-meter.

Table 1:Some frequently-used R-T data for T1,T2,T3 and T4 sensor:

Temperature (℃) 5 10 15 20 25 30 40 50 60

Resistance Value (KΩ) 26.9 20.7 16.1 12.6 10 8 5.2 3.5 2.4

Table 2:Some frequently-used R-T data for T5 sensor:

Temperature (℃) 5 15 25 35 60 70 80 90 100

Resistance Value (KΩ) 141.6 88 56.1 36.6 13.8 9.7 6.9 5 3.7

Resistance value (KΩ)

T emperature (℃)

0

20

40

60

80

100

120

140

160

180

200

0 5 10 15 20 25 30 35 40 45 50

T5

T1,T2,T3,T4

LAK Self Diagnostics

The LED mounted on the Low Ambient Kit [LAK] provides indication of the following:

Type Contents LED Flashing

Error LAK ambient temp. sensor fault Flashes 7 times and then off for 2.5s, cyclically

Error Zero crossing signal fault Flashes 6 times and then off for 2.5s, cyclically

Error LAK pipe temp. sensor fault Flashes 5 times and then off for 2.5s, cyclically

Normal Power supply: 50Hz, working in heating mode

Flashes 4 times and then off for 2.5s, cyclically

Normal Power supply: 50Hz, working in cooling mode

Flashes 3 times and then off for 2.5s, cyclically

38LUV GEN1 AND 2 PCBs EXPLAINED On the original residential inverters, some models had a separate PCB for outdoor fan speed control. This PCB is called a low ambient kit [LAK].

2nd generation products now all have this low ambient control feature combined into the main PCB.

Not all 2nd generation PCB’s are backward compatible with 1st generation indoor units.

Be very specific about what product you have when ordering replacement spare parts.

This includes the PCBs, reactors and compressors.

Model Generation 1 Generation 2 Comments 38LUV28 1 PCB LAK & main PCB combined 38LUV35 1 PCB LAK & main PCB combined 38LUV52 2 PCB’s LAK separate from main PCB 38LUV65 2 PCB’s LAK separate from main PCB 38LUV70 2 PCB’s LAK separate from main PCB 38LUV80 1 PCB LAK & main PCB combined

38LUV52 1 PCB LAK & main PCB combined 38LUV065H 1 PCB LAK & main PCB combined 38LUV070H 1 PCB LAK & main PCB combined

LUV INVERTER SERIES - Aircon Experts | Air Conditioning … A… · · 2016-04-04LUV INVERTER...

Documents

Transcript of LUV INVERTER SERIES - Aircon Experts | Air Conditioning … A… · · 2016-04-04LUV INVERTER...