Transcript ANNUAL TECHNICAL TRAINING 2009

TECHNICAL TRAINING
INVERTER-Y
Introduction
TROUBLESHOOTING
Technical Training
CONTENTS
Error Indication
 Error Diagnosis & Troubleshooting Guide
 Tools , Equipment

Technical Training
ERROR INDICATION
Technical Training
ERROR INDICATION
From indoor units
When any error occurs, indoor LED display will
keep blinking – green light:
• The blinking pattern not indicate error details
• The error details have to retrieved from handset
in error code form.
•
LED blinks here
Technical Training
ERROR INDICATION
•
Indoor : wireless handset -- G17 (McQuay)
-- G18 (Acson)
New -- GS01 (McQuay)
New -- GS02 (Acson)
: wired handset -- Netware 3 (standard for Ceiling Concealed)
Technical Training
ERROR INDICATION
Using wireless handset G17/18 to retrieve error code:
1.
For G17, hold down ON TIMER CANCEL or OFF TIMER CANCEL
for 5 seconds. For G18, Hold down TIMER CANCEL for 5
seconds until “ ” indication flashes on the handset
temperature display section.
G17
G18
ON TIMER CANCEL
OFF TIMER CANCEL
Technical Training
ERROR INDICATION
2.
Then, press the same button repeatedly . A series of error code
will appear until ID buzzer produces a long beep. The
corresponding error code is indicated on the handset
temperature display section.
3.
ID unit buzzer will produce a long beep if the handset error code
matched with unit error.
A short and two consecutive beeps is not the unit error.
The code display will cancel itself if the button is not pressed for
1 minute.
4.
5.
Technical Training
ERROR INDICATION
How to retrieved last state error
Remove battery from remote controller
Replace battery again into remote controller
ON/OFF
button
Mode
button
Press Mode & ON/OFF buttons together
The “ 00 “ will show at temperature section
ON TIMER
CANCEL
button
OFF TIMER
CANCEL
button
Press Mode button to 5:00
Press ON/OFF once
Repeat the normal step for faulty diagnosis by remote controller step
Technical Training
ERROR INDICATION
Using wireless handset GS01/02:
1.
Hold down ON TIMER CANCEL or OFF TIMER CANCEL for 5
seconds until “ ” indication flashes on the handset
temperature display section.
ON TIMER CANCEL
OFF TIMER CANCEL
Technical Training
ERROR INDICATION
2.
Then, press the same button repeatedly. A series of error code
will appear until ID buzzer produces a long beep. The
corresponding error code is indicated on the handset
temperature display section.
3.
ID unit buzzer will produce a long beep if the handset error code
matched with unit error.
A short and two consecutive beeps is not the unit error.
The code display will cancel itself if the button is not pressed for
1 minute.
4.
5.
Technical Training
ERROR INDICATION
Using wired handset Netware 3:
 The error will show at last 2 digits of the clock display.
 Netware 3 also can retrieved last state memory by :
 Press SLEEP & TIMER ACTIVE simultaneously and the error will
be flashed on the last 2 digits of the clock display.
Technical Training
ERROR INDICATION
Error code description for Y-series inverter :
ERROR DESCRIPTION
5LCY
10/15 DR
20/25 CR
5LCY
10/15 ER
5LCY
30/40/50/60
CR
5MSY
20/25/30 BR
00
Normal
√
√
√
√
2
A1
INDOOR PCB ERROR
√
√
√
√
3
A3
DRAIN PUMP ABNORMAL
√
x
√
√
4
A5
ANTIFREEZE PROTECTION
√
√
x
√
5
A6
INDOOR FAN MOTOR ABNORMAL
√
√
√
√
6
A7
AIR SWING MOTOR LOCK
√
x
√
√
7
A8
ABNORMAL POWER SUPPLY VOLTAGE
x
x
√
x
8
C4
INDOOR HEAT EXCHANGER THERMISTOR
SHORT/OPEN
√
√
√
√
9
C9
INDOOR ROOM THERMISTOR SHORT/OPEN
√
√
√
√
No.
ERROR
CODE
1
= will be explain in error diagnosis
Technical Training
ERROR INDICATION
Error code description for Y-series inverter :
ERROR DESCRIPTION
5LCY
10/15 DR
20/25 CR
5LCY
10/15ER
5LCY
30/40/50/60
CR
5MSY
20/25/30 BR
E1
OUTDOOR PCB ERROR
x
√
√
√
11
E3
HIGH PRESSURE PROTECTION
x
x
√
x
12
E4
LOW PRESSURE PROTECTION
x
x
√
x
13
E5
COMPRESSOR OVERLOAD
√
√
√
√
14
E6
COMPRESSOR LOCK /START-UP ERROR
√
√
x
√
15
E7
OUTDOOR FAN MOTOR LOCK
√
√
√
√
16
E8
AC INPUT OVER CURRENT
√
√
x
√
17
E9
EXV ERROR
x
x
√
x
18
EA
4 WAY VALVE ERROR
x
√
x
√
19
F3
DISCHARGE PIPE OVERHEAT
√
√
√
√
No.
ERROR
CODE
10
Technical Training
ERROR INDICATION
Error code description for Y-series inverter :
ERROR DESCRIPTION
5LCY
10/15 DR
20/25 CR
5LCY
10/15 ER
5LCY
30/40/50/60
CR
5MSY20/25/30
BR
F6
HEAT EXCHANGER OVERHEAT
√
√
x
√
21
H0
COMPRESSOR SENSOR SYSTEM ABNORMAL
x
√
x
√
22
H3
HIGH PRESSURE SWITCH ERROR
x
x
√
x
23
H6
POSITION SENSOR ABNORMAL ( compressor )
√
√
x
√
24
H8
AC CURRENT SENSOR ERROR
√
√
x
√
25
H9
OUTDOOR AIR THERMISTOR SHORT/OPEN
√
√
√
√
26
J1
PRESSURE SENSOR ERROR
x
x
√
x
27
J3
COMPRESSOR DISCHARGE PIPE THERMISTOR
SHORT/OPEN/MISPLACED
√
√
√
√
28
J5
SUCTION PIPE THERMISTOR SHORT/ OPEN
x
x
√
X
J6
OUTDOOR HEAT EXCHANGER THERMISTOR
SHORT/ OPEN
√
√
√
√
N
o.
ERROR
CODE
20
29
Technical Training
ERROR INDICATION
Error code description for Y-series inverter :
ERROR DESCRIPTION
5LCY
10/15 DR
20/25 CR
5LCY
10/15 ER
5LCY
30/40/50/6
0 CR
5MSY20/25/30
BR
J7
SUBCOOLING HEAT EXCHANGER THERMISTOR
SHORT/ OPEN
x
x
√
x
31
J8
LIQUID PIPE THERMISTOR SHORT/ OPEN
x
x
√
√
32
J9
GAS PIPE THERMISTOR SHORT/ OPEN
x
x
x
√
33
L1
OUTDOOR PCB ERROR
x
x
√
x
34
L3
ELECTRICAL BOX TEMPERATURE RISE
( compressor off )
√
√
x
√
35
L4
HEAT SINK OVERHEAT ( compressor on )
√
√
√
√
36
L5
IPM ERROR / IGBT ERROR ( output over current )
√
√
√
√
L8
ELECTRONIC THERMAL ( time lag-compressor
signal disorder position)
x
x
√
x
ERROR
CODE
30
No.
37
Technical Training
ERROR INDICATION
Error code description for Y-series inverter :
ERROR DESCRIPTION
5LCY
10/15 DR
20/25 CR
5LCY
10/15 ER
5LCY
30/40/50/60
CR
5MSY20/25/30
BR
P1
OPEN PHASE OR VOLTAGE UNBALANCE
x
x
√
x
39
P4
HEAT SINK THERMISTOR SHORT / OPEN
√
√
√
√
40
U0
INSUFFICIENT GAS
√
√
√
√
41
U2
DC VOLTAGE OUT OF RANGE
√
√
√
√
42
U4
COMMUNICATION ERROR
√
√
√
√
43
UA
INSTALLATION ERROR
√
√
√
√
44
UH
ANTIFREEZE PROTECTION IN OTHER ROOM
x
x
x
√
No.
ERROR
CODE
38
Technical Training
ERROR INDICATION
From outdoor unit :
When unit error happen, the error will show at
outdoor display .
1) 5LCY-10/15DR, 20/25CR : 7 segment display
2) 5MSY-20/25/30BR
3) 5LCY-30/40/50/60ER
4) 5LCY-10/15ER
: 5 LED light indicator
: 2 LED light indicator
: Nil
Technical Training
ERROR INDICATION

1. 5LCY-10/15 DR, 20/25CR: 7 segment display
The 7 segment display is located inside outdoor unit control
panel beside the terminal block. Control panel cover have to
remove before access to the 7 segment display.
Overall photo for
slx10,25
Overall photo for
control box slx10,25
Technical Training
ERROR INDICATION


When there is no error, compressor running frequency is displayed.
When there is error, it flashes the error code as below:
Normal operation
Flashing error code
Technical Training
ERROR INDICATION
In addition, 7 segment also can be use to retrieve unit operating
condition such as running current, DC voltage, ambient
temperature, indoor air temperature , etc.
 By pressing the tact switch, the 7 segment will start to flash from
“00”. Press again, it will show “ 01”
and subsequent running number shows
the parameter number.
 Then, the 7 segment will flashing again
showing the parameter measurement.
 When the 7 segment display is left untouched
for 5 min, the display will light off (Dim).

Technical Training
ERROR INDICATION
Parameter
Parameter Description
Number
00
01
02
03
04
05
06
07
08
09
10
Compressor Actual Rotation
Compressor Target Rotation
DC Bus Voltage
Total Current (x10)
Outdoor Air Temperature
Outdoor Heat Exchanger Temperature
Compressor Discharge Temperature
Outdoor Heatsink Temperature
Indoor Air Temperature
Indoor Heat exchanger Temperature
EXV Opening
Unit/ range
r/s
r/s
VDC
A
°C
°C
°C
°C
°C
°C
Pulse
For measurement of 125, the 7 segment will display as 25 first follow by 01
Technical Training
ERROR INDICATION
2. 5MSY-20/25/30BR: 5 LED display at display board
 LED A – flashing GREEN LED indicates normal equipment condition.
LED 1 - 4 – OFF condition of the red LED indicates normal equipment
condition.
LED 1-4 -- blinking indicates error.
Technical Training
ERROR INDICATION
Error code for 5MSY :
LED INDICATION
Red
Green
A
1 2 3 4
◑
● ● ● ●
◑
◑
◑
◑
◑
◑
◑
◑
◑
◑
◑
●
●
●
●
●
●
○
○
○
○
○
◑
○ ○ ● ●
◑
◑
◑
●
●
●
○
○
○
●
●
●
●
●
●
○
○
●
○
○
●
●
○
○
○
○
●
○
○
●
○
●
○
●
●
○
○ ○ ● ○
○ ○ ○ ●
○ ○ ○ ○
Description
00
UA
UH
L4
L5
U0
E8
E6
U7
EA
U2
E5
F3
A5
F6
H0
H6
H8
H9
J3
J6
J8
J9
P4
L3
E1
E7
NORMAL
INSTALLATION ERROR
ANTIFREEZE (OTHER ROOMS)
HEAT SINK OVERHEAT
IPM ERROR / IGBT ERROR
INSUFFICIENT GAS
AC INPUT OVER CURRENT
COMPRESSOR START-UP ERROR
COMMUNICATION ERROR (OUTDOOR CONTROL PCB AND IPM PCB)
4 WAY VALVE ERROR
DC VOLTAGE OUT OF RANGE
COMPRESSOR MOTOR LOCK / COMPRESSOR OVERLOADED
DISCHARGE PIPE OVERHEAT
ANTIFREEZE (COOLING)
HEAT EXCHANGER OVERHEAT
COMPRESSOR SENSOR SYSTEM ERROR
COMPRESSOR FEEDBACK DETECTION ERROR
AC CURRENT SENSOR ERROR
OUTDOOR AIR THERMISTOR SHORT/OPEN
COMPRESSOR DISCHARGE PIPE THERMISTOR SHORT / OPEN / MISPLACED
OUTDOOR HEAT EXCHANGER THERMISTOR SHORT/ OPEN
LIQUID PIPE THERMISTOR SHORT/ OPEN
GAS PIPE THERMISTOR SHORT/OPEN
HEAT SINK THERMISTOR SHORT / OPEN
OUTDOOR CONTROL BOX OVERHEAT
OUTDOOR PCB ERROR
OUTDOOR DC FAN MOTOR LOCK
Legend
◑ Blinks
● Off
○ On
Technical Training
ERROR INDICATION
3. 5LCY-30/40/50/60ER: 2 LED light indicator
 LED HAP – flashing GREEN LED indicates normal condition.
 LED
HAP – OFF condition indicates power supply abnormal or faulty
outdoor PCB
 LED H3P – OFF condition of the red LED indicates normal condition.
 LED H3P – ON condition indicates protection devices activate
Technical Training
OTHERS
 5LCY30/40/50/60 display PCB guide :
5LCY30
ER
Display
PCB
5LCY
40/50/60 ER
Technical Training
ERROR INDICATION
4. 5LCY-10/15ER: Nil
•
For K-series inverter, the outdoor will not have error
indicator, have to refer to indoor when error happen.
Technical Training
ERROR DIAGNOSIS
Technical Training
ERROR DIAGNOSIS
ERROR A 1 : Indoor PCB error
Error message
:
A1
Method of malfunction detection :
Evaluation of zero- cross detection of power supply by indoor unit
Malfunction decision condition
: When there is no zero-cross detection in 10 seconds continuously.
causes
:
1.) Faulty indoor PCB
2.) Faulty connector connection at indoor
Troubleshooting flow :
Turn off unit
Check indoor PCB connector conditions
( including PCB to terminal block and all PCB wire connector)
YES
Any sign of loose or abnormal
Connect correctly and operate again
NO
Replace indoor PCB and operate again
Technical Training
ERROR DIAGNOSIS
ERROR A 3 : Drain pump abnormal (for ceiling cassette unit)
Error message
:
A3
Method of malfunction detection :
Malfunction decision condition
causes
Evaluation of water level upper limit and float switch condition
: When water level reach upper limit and float switch turn off
:
1.) Faulty drain pump or float switch
2.) Improper drain piping work or drain pipe blockage
Troubleshooting flow :
Turn off unit
Check drain pump connector connect
to indoor PCB
YES
Any sign of loose or abnormal
Connect correctly and operate again
NO
Restart back operation
Technical Training
ERROR DIAGNOSIS
ERROR A 3 : Drain pump abnormal (for ceiling cassette unit)
NO
Drain pump works ?
Change drain pump
YES
Drain water level abnormal high
after sometimes ?
YES
NO
Float switch connect to
the PCB?
NO
Connect float switch
YES
NO
Drainage system problem or blockage
Check float switch have
continuity?
Change float switch
YES
Change indoor PCB
Technical Training
ERROR DIAGNOSIS
ERROR A 5 : Antifreeze Protection
Error message
:
A5
Method of malfunction detection :
Malfunction decision condition
causes
Freeze-up protection control during cooling by detection of indoor heat exchanger thermistor.
: When indoor heat exchanger thermistor less than 0 ◦ C .
:
1.) Indoor air filter , heat exchanger block .
2.) Indoor air short circuit .
3.) Indoor coil thermistor faulty, Indoor PCB faulty.
Troubleshooting flow :
Check indoor air flow
YES
Any air short circuit ?
Provide sufficient air passage
NO
Check intake air filter
Technical Training
ERROR DIAGNOSIS
ERROR A 5 : Antifreeze Protection
YES
Is it very dirty ?
Clean the air filter
NO
Check the dust accumulate at indoor coil
YES
Is it very dirty ?
Clean the indoor coil
Check indoor coil thermistor resistance
# Refer to thermistor resistance table
YES
Does it conform to the thermistor
accuracy table?
Change indoor PCB
NO
Change indoor coil thermistor
Technical Training
ERROR DIAGNOSIS
ERROR A 6 : Indoor fan motor abnormal
Error message
:
A6
Method of malfunction detection :
Malfunction decision condition
causes
Rotation speed detected by the indoor PCB during fan motor running is used to determine this error.
: When the detected motor rotation speed does not reach the target rotation speed by the program
:
1.) Indoor fan motor winding short, or the motor lead wire broken
2.)Indoor PCB faulty.
Troubleshooting flow :
Technical Training
ERROR DIAGNOSIS
ERROR A 6 : Indoor fan motor abnormal
Turn off power supply and rotate fan by hand
NO
Does it rotate ?
Change fan motor
YES
Turn ON and run fan
NO
Does it rotate ?
Change fan motor
YES
Change PCB
Technical Training
OTHERS :
 Inverter–Y series fan motor:
5LCY
10/15 DR
5LCY
5LCY
5MSY
20/25 CR 10/15 ER 20/25/30
BR
5LCY
30/40/50/
60 ER
AC
AC
DC
DC
DC
WM
AC
DC
DC
------
-------
CC,CK,
CM
AC
AC
------
-------
--------
Outdoor
Indoor
Technical Training
ERROR DIAGNOSIS
ERROR A 8 : Abnormal power supply voltage
Error message
:
A8
Method of malfunction detection :
Malfunction decision condition
causes
Checking of input voltage
: When the voltage detected out of range of ± 10 % of 240 V.
:
1.) Power supply problem or blackout.
2.) Wiring problem or Indoor PCB faulty.
Troubleshooting flow :
Check the condition of power source :
1.) voltage is 220V-240V± 10%
2.) Check there is power open phase or wiring problem
3.) Check power supplier fluctuation within 6V
YES
Any problem as describe above?
Correct the supply problem
NO
Possible of external factor such as blackout
Technical Training
ERROR DIAGNOSIS
ERROR C4, C9 : INDOOR HEAT EXCHANGER , ROOM THERMISTOR
SHORT/OPEN
Error message
:
C4, C9
Method of malfunction detection :
Malfunction decision condition
causes
Temperature detected by the thermistor
: When the thermistor input is > 4.96V or <0.04V during compressor operation.
:
1.) Thermistor , connector faulty.
2.) Indoor PCB faulty.
Troubleshooting flow :
Check the thermistor connector condition
No
Normal ?
Correct the problem
Yes
Check thermistor resistance value
# Refer thermistor resistance table
No
Normal ?
Replace thermistor
Replace PCB
Technical Training
ERROR DIAGNOSIS
ERROR C4, C9
Indoor heat exchanger thermistor

( 5WMY10/15 JR ) Location of indoor coil thermistor:
CN COIL
Technical Training
ERROR DIAGNOSIS
ERROR C4, C9
Indoor room thermistor

For room thermistor : WMY-J series, K-series = Chips type thermistor mount to the PCB.
other indoor - copper sensor attached to return air location
Air intake gap for room
temperature sensing
RTH201
Unit design with air opening at the front panel to allow
sufficient space for air flow & measurement
Technical Training
ERROR DIAGNOSIS
ERROR E3 : High pressure protection (for 5LCY 30-60 ER)
Error message
:
E3
Method of malfunction detection :
Malfunction decision condition
causes
Protection device check high pressure switch continuity
: When the high pressure switch is turn off at 4MPa. ( 580 psi ) , turn on at 3 MPa ( 435 psi )
:
1.) faulty high pressure switch , connector or wire harness
2.) Indoor filter , outdoor coil dirty.
3.) Outdoor fan not running, unit overcharge, stop valve is closed.
Troubleshooting flow :
Check the installation condition
No
Stop valve open?
Open the stop valve
Yes
High pressure switch connect
to outdoor PCB?
No
Connect correctly
Turn off unit. Wait for compressor stop 10 minutes
Technical Training
ERROR DIAGNOSIS
ERROR E3 : High pressure protection (for 5LCY30-60 ER)
Have continuity for high
pressure switch?
No
Replace high pressure switch
Yes
Check the abnormal unit high
pressure condition
# Refer how to check high pressure condition
Yes
Have abnormal condition?
Correct the abnormal condition
No
Replace outdoor PCB
Technical Training
 Outdoor high pressure condition check :
Technical Training
ERROR DIAGNOSIS
Installation condition : 5LCY10/15 DR
Where a wall or other
obstacle is in the path of
outdoor unit’s intake or
exhaust airflow
Follow this installation
guidelines to avoid air
short circuit
Technical Training
ERROR DIAGNOSIS
ERROR E4 : Low pressure protection (for 5LCY30-60 ER)
Error message
:
E4
Method of malfunction detection :
Malfunction decision condition
causes
Protection device check low pressure switch continuity
: When the pressure detected is < 0.12 MPa ( 17 psi )for continues 5 minutes.
:
1.) faulty low pressure switch , faulty outdoor PCB
2.) Stop valve closed, unit leakage or refrigerant not enough.
3.) Abnormal refrigerant piping system ,faulty EXV
Troubleshooting flow :
No
Stop valve open?
Open the stop valve
Yes
Low pressure switch connect
to outdoor PCB?
No
Connect correctly
Yes
Measure the voltage between low pressure switch
# Refer how to check low pressure voltage
Technical Training
ERROR DIAGNOSIS
ERROR E4 : Low pressure protection (for 5LCY30-60 ER)
Relation between Voltage and
pressure follow the graph?
No
Change the low pressure switch
Yes
No
Is the refrigerant pressure
abnormally low?
Change the Outdoor PCB
Yes
Correct refrigerant system
( gas shortage, leakage or piping block )
# Refer how to check low pressure condition
Technical Training
 Outdoor low pressure condition check :
Technical Training
 Outdoor pressure sensor condition check :
For 5LCY30-60 ER pressure switch:
PH = detected pressure ( MPa )
V = Output Dc voltage
PH = 1.38 V -0.69
Technical Training
ERROR DIAGNOSIS
ERROR E5 : Compressor overload
Error message
:
E5
Method of malfunction detection :
Malfunction decision condition
causes
Detected by compressor overload
: When compressor overload activate twice. If active once, will be reset if not happen in following 60 mins.
:
1.) Stop valve , EXV defective
2.) 4wv , outdoor PCB defective
3.) Refrigerant shortage, water mixed in the piping
Troubleshooting flow :
Turn off unit. Disconnect
Compressor wire hardness
( U,V,W )
Check compressor winding resistance
# Refer compressor resistance table
No
Resistance normal?
Change compressor
Yes
Technical Training
ERROR DIAGNOSIS
ERROR E5 : Compressor overload
Connect back wire and turn on unit
Yes
Compressor stop without running?
Change outdoor PCB
No
Compressor run for sometimes.
Check EXV, stop valve, refrigerant level, 4WV and
water in the piping, installation condition
Technical Training
ERROR DIAGNOSIS
 Inverter –Y series Compressor spec:
5LCY 10/15 DR
5LCY 20/25 CR
5LCY 10/15 ER
5MSY 20 BR
5MSY25/30 BR
5LCY 30 ER
5LCY 40/50/60 ER
Compressor
type
Rotary
Rotary
(swing)
Rotary
(swing)
Rotary
(swing)
Rotary
(swing)
rotary
(swing)
scroll
Compressor
manufacturer
Panasonic
Daikin
Daikin
Daikin
Daikin
Daikin
Daikin
Compressor
model
5RS102XBJ01
2YC32GXD
1YC23AEXDA
2YC36BXD
2YC45BXD
2YC63DXD
JT-100G-VD
Compressor
winding
resistance
( U,V,W ) -Ω
0.858
1.18
1.764
0.828
0.787
0.31
0.31
motor
6 pole
brushless
motor
4 pole
brushless
motor
6 pole brushless
motor
4 pole brushless
motor
General guide :1) Resistance of compressor winding < 10 Ω consider Ok
2) All 3 terminal resistance value must be same.
Technical Training
Other :
 Inverter –Y series Compressor spec :
6 poles motor
4 poles motor
Technical Training
ERROR DIAGNOSIS
ERROR F3 : Discharge pipe overheat
Error message
:
F3
Method of malfunction detection :
Malfunction decision condition
Compressor discharge thermistor is checked with discharge temperature control.
: When compressor discharge temperature is at abnormal high level or rise suddenly.
E.g. : 110 -120 degree C varies by model. 100-110 degree C when compressor frequency low.
causes
:
1. Faulty discharge thermistor, compressor, Outdoor PCB
2. Refrigerant shortage
Troubleshooting flow :
Check discharge thermistor condition
Any wire damage,
not insert to connector?
Yes
Correct wiring
No
Check discharge thermistor resistance value
# Refer resistance table : for discharge thermistor,
different spec.
Technical Training
ERROR DIAGNOSIS
ERROR F3 : Discharge pipe overheat
Resistance value
Normal?
No
Change discharge thermistor
Yes
Check refrigerant level, compressor,
EXV & stop valve.
Technical Training
ERROR DIAGNOSIS
ERROR F6 : Heat exchanger overheat
Error message
:
F6
Method of malfunction detection :
Malfunction decision condition
causes
Detect heat exchanger ( outdoor coil ) temperature during cooling mode .
: Activate when outdoor coil temperature exceed 65 º C. Error reset when temperature drop to 50º C.
:
1.) Faulty outdoor coil thermistor, faulty outdoor PCB
2.) Installation space not enough, hot air short circuit, fan motor not running , coil dirty
Troubleshooting flow :
Check outdoor installation condition
Yes
Any abnormal?
Change outdoor location,
clean outdoor coil.
No
Check outdoor fan motor
Technical Training
ERROR DIAGNOSIS
ERROR F6 : Heat exchanger overheat
No
Fan motor running smoothly?
Change fan motor
Yes
Check outdoor coil thermistor resistance
# Refer resistance table
No
Resistance normal?
Change thermistor
Yes
Change outdoor PCB
Technical Training
ERROR DIAGNOSIS
ERROR H0 : Compressor sensor system abnormal
Error message
:
F6
Method of malfunction detection :
Malfunction decision condition
causes
Detect the compressor current and voltage before compressor start.
: Detected DC voltage is too low or too high. No current detected when compressor start
:
1.) Outdoor PCB, compressor problem
2.) Compressor wrong wiring, reactor not connected.
Troubleshooting flow :
Check reactor connection
Yes
Any abnormal?
Connect back reactor
No
Check reactor resistance
Technical Training
ERROR DIAGNOSIS
ERROR H0 : Compressor sensor system abnormal
# disconnect the reactor wire and measure
resistance between terminal
Check reactor resistance
No
<10 Ω ?
Change reactor
Yes
Check compressor resistance
No
<10 Ω ?
Change compressor
Yes
Change outdoor PCB
Technical Training
ERROR DIAGNOSIS
ERROR H9, J3,J5,J6,J7,J8,J9,P4 : Outdoor Thermistor related abnormal
Error message
:
H9,J3,J5,J6,J7,J8,J9,P4
Method of malfunction detection :
Malfunction decision condition
Detect the temperature detected by the thermistor.
: When thermistor is disconnected or short circuit during operation.
J3 is judged when compressor discharge thermistor temperature is smaller compare to the condenser
thermistor temperature.
causes
:
1.) Thermistor, connector problem
2.) Outdoor PCB problem
Troubleshooting flow :
Check connector for the thermistor with error
Yes
Thermistor disconnected or loose?
Connect thermistor back
No
Check thermistor resistance
# Refer thermistor spec and the table.
Technical Training
ERROR DIAGNOSIS
ERROR H9, J3,J5,J6,J7,J8,J9,P4 : Outdoor Thermistor related abnormal
No
Resistance value normal?
Change thermistor
Yes
Change outdoor PCB
H9 :Outdoor air thermistor
J3 : Compressor discharge thermistor
J5 : Suction pipe thermistor (for 5LCY30-60 model)
J6 : Outdoor heat exchanger thermistor
J7 : Sub-cool heat exchanger thermistor (for 5LCY 30-60 model)
J8 : Liquid pipe thermistor (for 5LCY30-60, 5MSY20-30)
J9 : Gas pipe thermistor (for 5MSY20-30)
P4 : Heat sink thermistor (for 5MSY20-30, 5LCY10-15ER, 5LCY10-15DR)
Technical Training
ERROR DIAGNOSIS
 Inverter –Y series Thermistor spec :
Indoor
Outdoor
5LCY
10/15
DR
5LCY
20/25
CR
5LCY
10/15
ER
5LCY
30/40/50/
60 ER
5MSY
20/25/30
BR
WM
10K
10K
20K
-------
------
CC,CK,
CM
10K
10K
------
10K
10K
20K
------20K
20K
Except for
discharge pipe
thermistor =230K
(Refer 20k table)
Technical Training
 How to check thermistor resistance
Use multi meter to check the thermistor resistance value.
Technical Training
 Inverter–Y series Thermistor spec : (10 KΩ)
At 25C
Resistance value: 10 k
Technical Training
 Inverter–Y series Thermistor spec : (20 KΩ)
At 25C
Resistance value: 20 k
Technical Training
 Inverter–Y series Thermistor spec : (discharge thermistor)
Discharge thermistor spec
for 5LCY 30/40/50/60
Technical Training
ERROR DIAGNOSIS

For Outdoor 5LCY10/15 DR :
Outdoor air thermistor with PVC
protection sleeve
All thermistor ( discharge, air, coil )
share a same connector and
connect to PCB
Outdoor discharge , heat exchanger
Thermistor : copper type
Technical Training
ERROR DIAGNOSIS
ERROR L3 : Electrical Box temperature rise (compressor off)
Error message
:
L3
Method of malfunction detection :
Malfunction decision condition
Detect the temperature of heat sink when compressor off.
: Heat sink temperature >80 º C( MSY ), > 93 º C ( K-series ) when compressor off. Error reset when
temperature drop < 70 º C.
causes
:
1.) Outdoor fan , PCB problem
2.) Heat sink thermistor, connector problem
Technical Training
ERROR DIAGNOSIS
ERROR L3 : Electrical Box temperature rise (compressor off)
Troubleshooting flow :
Turn off the unit and turn on back after 20 mins
No
Error again ?
# Refer thermistor spec and the table.
Check outdoor fan
Yes
No
Check heat sink thermistor resistance
Change outdoor
fan motor
Outdoor fan functioning?
Yes
No
No
Change thermistor
Resistance normal?
Yes
No
Change outdoor PCB
Heat sink temperature
> 80 ºC ?
Heat sink dirty?
Check installation
condition
Yes
Clean the heat sink
Change heat sink or check outdoor fan condition
Technical Training
ERROR DIAGNOSIS
ERROR L4 : Heat sink overheat (compressor on)
Error message
:
L4
Method of malfunction detection :
Malfunction decision condition
Detect the temperature of heat sink when compressor on.
: Heat sink temperature >103º C( MSY ), > 93 º C ( K-series ) when compressor on. Error clear when
not happen in the following 60 mins.
causes
:
1.) Outdoor fan , PCB problem
2.) Heat sink thermistor, connector problem
Technical Training
ERROR DIAGNOSIS
ERROR L4 : Heat sink overheat (compressor on)
Troubleshooting flow :
Turn off the unit and turn on back after 20 mins
No
Error again ?
# Refer thermistor spec and the table.
Check outdoor fan
Yes
No
Check heat sink thermistor resistance
Outdoor fan functioning?
Yes
No
Change thermistor
Resistance normal?
Yes
Change outdoor
PCB
No
Heat sink temperature
> 93 ºC ?
Change outdoor
fan motor
No
Check installation
condition
Heat sink dirty?
Yes
Clean the heat sink
Yes
Change heat sink or check outdoor fan condition
# Make sure condition of silicon grease
apply to IPM , and diode bridge is good.
Technical Training
 Application of silicon grease to IPM board and diode bridge :
Technical Training
ERROR DIAGNOSIS
 Bad condition of silicon grease can cause
L4 ( heat sink overheat )
L5 ( IPM error )
Heat sink
Silicon grease
IPM board
Technical Training
ERROR DIAGNOSIS

For Outdoor 5LCY10/15 DR : The heat sink thermistor is screw and connect
the PCB ( port : CN HTSK )
Technical Training
ERROR DIAGNOSIS
ERROR L5 : IPM (inverter power module) / IGBT error
(output over current)
Error message
:
L5
Method of malfunction detection :
Malfunction decision condition
Detect the output current that flows into IPM board inverter DC section.
: When over current has been detected by IPM and feedback MCU.
A position signal , speed signal error happen during compressor running.
causes
:
1.) Over current due to IPM board, internal wiring, wire connector loose, PCB problem
2.) Over current due to stop valve close, compressor failure, abnormal supply voltage.
3.) Over current due to silicon grease not apply to the IPM board contact point properly.
No
Stop valve fully open?
Open stop valve
Yes
Turn off the unit and turn on back after 20 mins
No
Error again ?
Continue monitor for supply voltage, discharge,
suction pressure, compressor overload,
Check for silicon grease at IPM condition
Yes
Technical Training
ERROR DIAGNOSIS
ERROR L5 : IPM / IGBT error (output over current)
Turn off the unit and disconnect
compressor U,V,W wire
Check compressor winding resistance
No
Resistance normal
Change compressor
Yes
Change the Outdoor PCB
Technical Training
ERROR DIAGNOSIS
ERROR U0 : Insufficient gas
Error message
:
L5
Method of malfunction detection :
Checking compressor running frequency and input current.
Checking compressor discharge temperature versus target discharge temperature and EXV opening.
Malfunction decision condition
: When input current is smaller compare to target current.
When compressor discharge temperature is higher compare to target discharge temperature and the EXV
opening is high( >450 pulse )
causes
:
1.) Refrigerant shortage, unit leakage
2.)Refrigerant piping system block,
3.) EXV defective, thermistor disconnected, stop valve closed
Technical Training
ERROR DIAGNOSIS
ERROR U0 : Insufficient gas
Any thermistor disconnected?
Yes
Connect back
No
Yes
Stop valve closed?
Open stop valve
No
Check for EXV function
No
EXV functioning?
Change EXV
Yes
Check for refrigerant level
# How to check refrigerant level
Technical Training
ERROR DIAGNOSIS
ERROR U0 : Insufficient gas
No
Refrigerant level normal?
Check for leakage
Yes
Yes
Change thermistor, outdoor PCB or compressor
Any leakage?
Repair the leak point
No
Add refrigerant
Technical Training
 How to check refrigerant level
- To set unit run in force cooling (unit will run at rated compressor fixed frequency).
- Connect pressure gauge outdoor suction service valve and measure the suction
pressure.
- Ideal suction pressure level : 125-150 psi
(depends on the outdoor ambient temperature).
Technical Training
ERROR DIAGNOSIS
Press & hold
- Press and hold on the ID ON/OFF button for 5-9 s when unit is in standby mode.
- Set to high fan mode and temperature at 16 °C using remote controller
Technical Training
ERROR DIAGNOSIS
ERROR U4 : Communication error (between indoor and outdoor)
Error message
:
U4
Method of malfunction detection :
Data received from the outdoor unit in indoor unit -outdoor unit signal transmission is checked whether it is
normal.
Malfunction decision condition
: When the data send from the outdoor cannot be received in ( XX second ) or the data content is abnormal.
causes
:
1.) Faulty indoor, outdoor PCB
2.)Indoor-outdoor signal wire line wiring error ( loose or broken ).
3.) External noise, power supply waveform disturbance
Check indoor-outdoor wiring connection
#Refer wiring check
Yes
Any wiring problem?
Correct the wiring
No
Check outdoor unit PCB “ status LED “
Technical Training
ERROR DIAGNOSIS
ERROR U4 : Communication error (between indoor and outdoor)
No
LED light on?
Change outdoor PCB
Yes
Check voltage of indoor-outdoor connection
between No.1-No.3 and No.2-No.3
Yes
Voltage =0?
Replace connection between indoor and outdoor
No
Check power supply waveform
#Refer supply waveform check
Yes
Any disturbance?
Find the source of power disturbance and correct it
No
Replace indoor unit PCB ,
external noise ( interference )
Technical Training
 Wiring – How to check communication wire :
 Maximum communication wire length: 50 meters
 Make sure the recommended type of wire is used
 Check for loose connection
Technical Training
 Power supply disturbance check
 Using power analyzer to check the supply voltage
Technical Training
ERROR DIAGNOSIS
ERROR UA : Installation error
Error message
:
UA
Method of malfunction detection :
Detected different type of transmission signal ( for different model )
Malfunction decision condition
: When detected different coupling of indoor-outdoor unit.
causes
:
1.) Outdoor and indoor unit not match ( wrong model , horsepower, )
2.)Wrong indoor-outdoor PCB.
3.) External noise, power supply waveform disturbance
1.
X-series inverter unit can not couple with Y-series inverter
2.
K-series inverter unit can not couple with X, Y series inverter and only
available in 1.0 ,1.5 Hose power.
Technical Training
ERROR DIAGNOSIS
ERROR UA : Installation error
5WMY10/15 JR
5LCY10/15 DR
Technical Training
TOOLS & EQUIPMENT
Technical Training
TOOLS & EQUIPMENT

Digital clamp meter

Digital multi-meter
: to check resistance , voltage, current,
wire continuity
AC CURRENT
RESISTANT
AC VOLTAGE
Technical Training
TOOLS & EQUIPMENT
 Manifold
(pressure) gauge and hose
Gauge :
High side :800 psig
Low side :250 psig for low-side
(500 low-side retard)
Hose : rated 800 psig
Technical Training
TOOLS & EQUIPMENT
 Refrigerant
 Weighing
tank
machine
 Thermocouple
 Test
pen
Technical Training
TOOLS & EQUIPMENT
 Replacement
parts : Indoor/outdoor PCB
5WMY10/15JR –indoor PCB
5LCY10/15DR –Outdoor PCB
Technical Training
TOOLS & EQUIPMENT
 Brazing
equipment
 Vacuum
pump & vacuum meter.
Technical Training
THANK YOU
&
Q&A
Technical Training