AE-XM24CR (serv.man11). Troubleshooting of control circuit - Sharp Air Conditioner Service Manual (repair manual)

ae-xm24cr (serv.man11) service manual
Model
AE-XM24CR (serv.man11)
Pages
4 Few pages! See other manuals at the bottom of the first or last page.
Size
419.87 KB
Type
PDF
Document
Service Manual
Brand
Device
Air Conditioner / Troubleshooting of control circuit
File
ae-xm24cr-sm11.pdf
Date

Read Sharp AE-XM24CR (serv.man11) Service Manual online

47
AY-XM7/9/12CR
AY-XPM7/9/12CR
AE-XM18/24CR
TROUBLESHOOTING OF CONTROL CIRCUIT
1
Yes
Yes
Yes
No
No
No
No
How to distinguish the defective parts
When all rooms are not cooled
Are the timer lamps of the in-
door units in all rooms flashing ?
Is the compressor of the outdoor 
unit operating ?
Are the timer lamps of the indoor 
units in all rooms flashing ?
Check the failure symptom with 
the failure diagnosis mode.
The cooling cycle is abnormal.
Check the pressure.
Check that the power between 
the terminal board " N " and " 1 " 
of the indoor unit is AC 230V, 
50Hz.
Repair the wiring between the 
units.
Press the OPERATION button 
to start operating the air-condi-
tioner. (One-room operation ON)
(Set the cooling mode to 18˚C.)
(Check the failure with the outdoor unit.)
TO
A
48
AY-XM7/9/12CR
AY-XPM7/9/12CR
AE-XM18/24CR
Yes
No
Yes
Yes
Yes
Yes
No
No
No
Yes
No
No
No
No
(Lamp : OFF)
(Lamp : ON)
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Open circuit of the 
outdoor thermistor
Replace the 
thermistor. 
Replace the 
Fan motor.
Replace the outdoor control PWB.
Replace the 
Compressor.
Replace the 
Power module.
Fix the power 
module with 
screws securely.
Replace the 
current 
transformer
Connect CN15.
Connect CN6.
Overheat of the 
compressor
Is CN9 connected ?
Is CN9B connected ?
Is CN1 connected ?
Is CN7 connected ?
Is CN16 connected ?
Is CN14 connected ?
Replace the outdoor 
Power supply P.W.B.
Check the voltage 
(18V) between CN14
  3   and   4    ? )
Replace the Power 
module
Connect CN9
Connect CN9B
Connect CN91
Connect CN7
Connect CN16
Connect CN14
Replace the 
outdoor relay P.W.B.
Check the voltage 
(13V) between CN9
  2   and   3    ? )
Replace the Power 
module
AC overcurrent
Rotation error of 
the compressor
Power module 
(IPM) abnormality
Abnormal 
AC current
Is the winding of 
the current 
transformer 
broken ?
Is the resistance 
value of the 
winding in the 
current 
transformer ? 
720
Open circuit of 
serial signal line
Short circuit of 
serial signal line
Power factor 
module (AF1) error
Is the Power factor
module in a state 
of flaoting from the 
heat sink ? 
Is the resistance 
value among the 
terminal of the 
Power factor 
module 0
 ?
Fix the Power 
factor module with 
screws secuely
Replace the Power 
factor module
Are two or three 
lamps switched 
off ?
Is CN15 
connected ?
Is CN6 
connected ?
Is the resistance 
value of the 
thermistor for 
the compressor 
(TH1), heat ex-
changer (TH2) 
or outdoor 
temperature 
correct (TH3) 
or suction (TH4) ?
Is the outdoor 
fan motor 
operating ?
Is the resistance 
value of the winding 
in the fan motor 
 ?
The cycle is 
abnormal.
The compressor 
is abnormal.
Is each of the 
resistance values 
among the 
terminals of the 
power module 
0Ω
 ?
P - U, N - U
P - V, N - V
P - W, N - W
Is the power 
module in a state 
of floating from 
the heat sink ?
Inspect the
compressor, 
heat exchanger 
and piping.
A
Replace the outdoor 
Power supply P.W.B.
49
AY-XM7/9/12CR
AY-XPM7/9/12CR
AE-XM18/24CR
2
Yes
Yes
No
Yes
No
No
No
Yes
No
No
Yes
Yes
Short circuit of the thermistor error
Open circuit of the thermistor error
Is the resistance value of the 
thermistor for UNIT A (TH5), 
UNIT B (TH6) or UNIT C (TH7) 
Open circuit of serial signal line
Short circuit of serial signal line
When one room is not cooled (other rooms are cooled)
Is the timer lamp of the 
indoor unit in the room 
not cooled flashing ?
Press the OPERATION 
button to start operating 
the air-conditioner.
(Set the cooling mode 
to 18˚C.)
Is the timer lamp of the 
indoor unit in the room 
not cooled flashing ?
Check that the power 
between the terminal 
board "N" and "1" of the 
indoor unit is AC 230V.
Repair the wiring 
between the units.
Replace the indoor 
control PWB.
Replace the thermistor.
Check the failure 
symptom with the failure 
diagnosis mode.
Replace the outdoor control 
PWB 
or the exppansion valve (UNIT A)
or the exppansion valve (UNIT B)
or the exppansion valve (UNIT C)
Is the resistance value of the 
winding in the fan motor 
?
(Between 1 and 3 of CN1)
Abnormal fan motor of  
indoor unit
The thermal fuse is blown.
The motor is locked.
Replace the indoor fan motor.
Is the wiring between the 
units connected by mistake 
or broken ?
Repair the wiring between 
the units.
Replace the indoor control PWB.
50
AY-XM7/9/12CR
AY-XPM7/9/12CR
AE-XM18/24CR
3  When all rooms are not heated
Does the air get cooler in the 
cooling operation mode?
Check the four-way valve. 
Has the cycle been switched? 
Replace the outdoor 
relay PWB. 
Is AC230V applied between 
the connector(CN4) 1 and 3 
of the 4-way valve ?
Replace the four-way valve.
Pressure check
The heating cycle is normal. 
Refer to (1) All rooms are 
not cooled.
Press the ON switch on the
 remote control to run the air 
conditioner. 
Set the temperature to 32˚C 
in the heating mode and 
start operation. 
Is the outdoor compressor
 running?
Yes
Yes
Yes
Yes
No
No
No
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Here you can read online and download Sharp AE-XM24CR (serv.man11) Service Manual in PDF. AE-XM24CR (serv.man11) service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sharp AE-XM24CR (serv.man11) Air Conditioner. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.