AE-X10 (serv.man10). Breakdown diagnosis procedure — Sharp Air Conditioner Service Manual (repair manual)

Model
AE-X10 (serv.man10)
Pages
3 Few pages! See other manuals at the bottom of the first or last page.
Size
148.23 KB
Type
PDF
Document
Service Manual
Brand
Device
Air Conditioner / Breakdown diagnosis procedure
File
ae-x10-sm10.pdf
Date

View Sharp AE-X10 (serv.man10) Service Manual online

27
AH/AY-X08CR
AH/AY-X10CR
AH/AY-X13CR
BREAK DO
WN DIA
GNOSIS PR
OCEDURE
Self-diagnostic procedure using display mode
If the timer lamp blinks during operation, the problem can be diagnosed using the following table.
: Blinks at 2-second intervals
: OFF
: ON
: Blinks 3 times at 0.2-second intervals
The error of outdoor unit
Display by indoor unit operation lamp
Displayed in a pattern which comes on at  the same 
time as the timer lamp
4 seconds off
What to check, procedure
Display by 
outdoor 
unit lamp 
LED 1
Diagnosis
Solution
Condition 
of indoor 
and 
outdoor 
unit
Normal
Twice
3 times
4 times
5 times
6 times
7 times
DC overcurrent error
AC overcurrent error
Normal
Overheat of the power
module or short circuit
of the heatsink 
thermistor.
1. Check the circuit in the power transistor module.
2. Is the outdoor fan revolving ?
1. Is the discharge outlet of the outdoor unit clogged ?
1. Measure the resistance of heatsink thermistor TH6 on the heatsink 
    in outdoor unit.
2. Check rotation of the fan motor in outdoor unit.
3. Is the power supply voltage at least 198V at full power operation ?
1. Measure the resistance of thermistor TH2 on the outdoor unit
    (see Figure 3).
1. Replace power transistor 
module
1. Clear the discharge outlet.
11 times
Power factor module error
1. CHeck wiring of power factor module.
1. Replace the power factor module.
1. Reattach.
2. Reattach CN101 and CN102, 
    otherwise replace power transistor 
    module assembly or outdoor control 
    board assembly.
9 times
14 times
13 times
Rotation errot of the 
compressor
1. Has not if escaped from the compressor CN6 ?
2. Is the power supplied of 15V and 6V supplied to the IPM PWB.
1. Replace the heatsink thermistor.
Open circuit of the 
heatsink thermistor.
1. Are the connectors of the heatsink thermistor in outdoor unit well 
    attached ?
2. Measure the resistance of thermistor TH6 on the heatsink. 
    (See Figure 3).
Overheat of the comp-
ressor error
(protector operating) or 
outdoor compressor  
thermistor TH1 short
1. Reattach.
2. Replace the heatsink thermistor.
1.
Replace the outdoor control board 
assembly 
(Current transformer wire break.) 
1. Reattach.
2.
Replace the outdoor thermistor 
assembly.
1.
Replace the outdoor thermistor 
assembly.
1.
Clear the discharge outlet.
2.
Assure power supply voltage.
3.
Refill to rated amount.
4.
Replace the outdoor ther-mistor 
assembly.
5.
Replace the indoor control 
board 
assembly or only TH2.
1. Can voltage be detected at the current transformer on the outdoor 
unit control board?
1.  Is the connector of the outdoor unit thermistors well attached ?
     (see Figure 3).
2. Measure the resistance of thermistors TH1 and TH2 on the 
outdoor unit (see Figure 3).
1. Is the discharge outlet of the outdoor unit clogged ?
2. Is the power supply voltage at least 198 V at full power operation ?
3. Check for refrigerant leaks at the tubing connections.
4. Measure the resistance of compressor thermistor TH1 on the 
outdoor unit (see Figure 3).
5. Measure the resistance of heat exchanger pipe thermistor TH2 on 
the indoor unit (see Figure 1).
AC abnormal current  
error
Open circuit of the 
outdoor thermistor error
Short circuit of the  
outdoor thermistor error
2.
Reattach CN3, otherwise replace 
    the fan motor of outdoor unit.
    3. Assure power supply voltage.
28
AH/AY-X08CR
AH/AY-X10CR
AH/AY-X13CR
Note:
1.
Normal : Only the timer lamp blinks. Error : Displayed by blinking of run
               lamp (above table).
2.
If the power plug is removed from the outlet or the breaker is switched to
               "OFF", the self-diagnostic memory will be erased.
3.
Example of outdoor unit LED 1 blinking :
: Blinks at 2-second intervals
: OFF
: ON
: Blinks 3 times at 0.2-second intervals
The error of indoor unit
Display by indoor unit operation lamp
Displayed in a pattern which comes on at  the same 
time as the timer lamp
4 seconds off
What to check, procedure
Display by 
outdoor 
unit lamp 
LED 1
Diagnosis
Solution
Condition 
of indoor 
and 
outdoor 
unit
Serial short
Serial open
1. Check the wiring between units.
1. Check the wiring between units.
1. Check the wiring between units.
2. Check the fuse in the outdoor unit.
3. Indoor control board.
4. Outdoor control board.
1. Rewire.
1. Rewire.
Indoor fan out of order
1. Is the fan motor locked ?
2. Is the wiring connector firmly fitted ?
3. Is the speed signal applied to the motor ?
Outdoor power supply  
does't turn on.
Wiring mistake.
1. Rewire.
2.
Replace the fuse, replace the 
outdoor board assembly.
3. Replace the board.
4. Replace the board.
1. Replace fan motor
2. Reattach.
3.
Replace the indoor control board 
assembly.
1
sec.
1
sec.
0.6
sec.
1
sec.
1
sec.
1
sec.
1
sec.
1
sec.
1
sec.
Overheat of the compressor
0.6
sec.
1
sec.
0.6
sec.
1
sec.
0.6
sec.
2 times
OFF
ON
OFF
29
AH/AY-X08CR
AH/AY-X10CR
AH/AY-X13CR
100
80
60
40
20
0
-10
0
10
20
30
40
Resistance
Thermistor
Room temperature
Heat exchange
Color
Yellow
Orange
To measure the resistance, first remove 
the connector as shown at right.
Room temperature 
thermistor TH1
Tester
Signal
CN7
CN7
Figure 1     Temperature properties of  indoor thermistors
500K
400K
300K
200K
100K
0
-20
0
20
60
80
100
120
3.06K
5.78K
4.17K
2.28K
1.72K
16
40K
30K
20K
10K
0
-20
0
20
60
40
16
Figure 3     Temperature properties of outdoor thermistors
Connector
CN8
TH2 Heat exchange thermistor
TH3 Outdoor temp. thermistor
TH1 compressor thermistor
TH2,TH3
Connector
CN8
Temperature (
°
C)
Temperature (
°
C)
Tester
Tester
Thermistor
To measure the 
resistance, first 
remove the 
connector from the 
board. 
Color
No.
 Connector
Compressor
thermistor
Heat exchanger
pipe thermistor
Outdoor temp.
thermistor
TH1
TH2
TH3
 No. 1 to 2
 No. 3 to 4
Red
Orange
 No. 5 to 6
Green
Microcomputer 
terminal
Input
signal
To Outdoor control board
Adaptor
(R22)
(GND)
(R16)
Pin No. 27
Pin No. 28
0
1
0        Low input
1        High input
K
Heat exchange thermistor 
TH2 (orange)
25
°
C resistance 15 K 
Room temperature 
thermistor TH1 (yellow)
25
°
C resistance 10 K
25
°
C resistance
45 K
Resistance (    )
Resistance (    )
0
°
C resistance
14.5 K
25
°
C resistance
4.431 K
Figure 2    Temperature properties of  heatsink thermistors
Heat exchange 
thermistor TH2
Tester
41
Cautions when attaching or removing the board
When oper
ating only the outdoor unit (cooling 40 Hz fix
ed mode) 
T
o
 mak
e
 
only the outdoor unit r
un in cooling mode
, shor
t the places mar
k
ed with 
arro
ws belo
w with an adaptor
, and apply a v
oltage of 220 ~ 240 
V A
C
 to 1 
and N on the ter
minal board.
 
(A
v
oid oper
ating the outdoor unit alone f
or long per
iods of time
.)
500
400
300
200
100
0
-20
0
20
40
Temperature (˚C)
80
100
3.25k
60
12.3k
6.14k
Resistance (k   )
Thermistor
Heatsink
Color
Black
To measure the resistance, first remove 
the connector as shown at right.
Signal
CN7
Heatsink thermistor 
TH6 (black)
25
°
C resistance 50k 
Tester
1
3
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