Samsung AQV12A Series - Display Error and Check Method; Display Error Mode

4-4 Samsung Electronics
Error Mode
Cauase Follow-up Measures
operation
Trouble
Shooting
Indoor
7-Segment
Outdoor LED
Comp.
Outdoor
Fan
Indoor
Fan
MPI
Y G R
no display
1min.Time out
Communicatiion
(Indoor detection)
- Check the connector of indoor-outdoor cable
- Check the fuse
OFF OFF OFF Continue page
no display
Indoor
Temperature
Sensor
Error(OPEN/
SHORT)
- Check assembling status of the sensor part’s
connector on the indoor unit main PCB
- Measure the resistance value on both sides
connector no. 1 and no. 2 (E121), no. 3 and no.
4 (E122) - by separating the sensor part’s con
-
nector
Temp.
(˚C)
Resistance
Valve(KΩ)
Temp.
(˚C)
Resistance
Valve(KΩ)
Others
15 14.68 30 8.31
The error
of DATA is
±2%.
20 12.09 35 6.94
25 10.00 40 5.83
* If not meet the above DATA, replace sensors.
OFF OFF OFF Continue page
no display
Indoor Heat
Exchanger
Temperature
Sensor Error
(OPEN/SHORT)
OFF OFF OFF Continue page
no display
Indoor Fan Motor
Speed Detecting
Error
(Occur when it
continues for 15
ssecond at below
450rpm)
- Check assembling status of the Motor Hall IC
output connector (CN44) on the indoor unit
main PCB
OFF OFF OFF OFF page
no display EEPROM Error OFF OFF OFF OFF page
no display
MPI Feedback
Error
- Check the assembly status of the
connector (CN6601)
- Change the
Continue Continue Continue OFF page
All blink no display
Option is erased
or wrong option
code is input
-Reset remote-control option code
OFF OFF OFF OFF page
  
1min. Time out
Communication
(Outdooe detec-
tion)
- Check the connector of indoor-outdoor cable
- Check the fuse
OFF
After 1
minute,
set OFF
OFF Continue page
  
Outdoor temp
sensor error
- Check the assembling statue of sensor parts
on the outdoor PCB
E221 : CN54 PIN#1,#2
E237 : CN54 PIN#5,#6
E251 : CN54 PIN#3,#4
OFF
After 1
minute,
set OFF
OFF Continue page
  
Coil temp sensor
error
OFF
After 1
minute,
set OFF
OFF Continue page
  
Discharge temp
sensor error
OFF
After 1
minute,
set OFF
OFF Continue page
  
Discharge over
temperature
- Check the assembling statue of sensor parts
on the outdoor PCB CN54 PIN#3,#4
OFF
After 1
minute,
set OFF
OFF Continue page
4-2 Display Error and Check Method
4-2-1 Display Error mode