SAMSUNG SH09ZP2 Service Manual Troubleshooting
6. Troubleshooting
6-1 Items to be checked first
1. The input voltage should be rating voltage ±10% range.
The airconditioner may not operate properly if the voltage is out of this range.
2. Is the link cable linking the indoor unit and the outdoor unit linked properly?
The indoor unit and the outdoor unit shall be linked by 5 cables.
Check the terminals if the indoor unit and outdoor unit are properly linked by the same number of cables.
Otherwise the airconditioner may not operate properly.
3. When a problem occurs due to the contents illustrated in the table below it is a symptom not related to the malfunction of the
airconditioner.
No
The OPERATION indication LED(GREEN) blinks when a
1
power plug of the indoor unit is plugged in for the first time.
In a COOL operation mode, the compressor does not
2
operate at a room temperature higher than the setting
temperature that the INDOOR FAN should operate.
[In case of heat pump model]
In a HEAT operation mode, the compressor does not
operate at a room temperature lower than the setting
temperature that indoor fan should operate.
Fan speed setting is not allowed in DRY( ) mode.
3
Compressor stops operation intermittently in DRY( )
4
mode.
Timer LED(GREEN) of the indoor unit lights up and the
5
air conditioner does not operate.
The compressor stops intermittently in a COOL mode or
6
DRY mode, and fan speed of the indoor unit decreases.
[In case of heat pump model]
7
Compressor of the outdoor unit is operating although it is
turned off in a HEAT mode.
Operation of air conditioner Explanation
It indicates power is on. The LED stops blinking if the operation ON/OFF button on the remote control unit is pushed.
In happens after a delay of 3 minutes when the compressor
is reoperated. The same phenomenon occurs when a power
is on.
As a phenomenon that the compressor is reoperated after a
delay of 3 minutes, the indoor fan is adjusted automatically
with reference to a temperature of the air blew.
The speed of the indoor fan is set to LL in DRY mode.
Fan speed is selected automatically in AUTO mode.
Compressor operation is controlled automatically in DRY
mode depending on the room temperature and humidity.
Timer is being activated and the unit is in ready mode.
The unit operates normally if the timer operation is cancelled.
The compressor stops intermittently or the fan speed of the
indoor unit decreases to prevent inside/outside air frozen
depending on the inside/outside air temperature.
When the unit is turned off while de-ice is activated,
the compressor continues operation for up to 9 minutes
(maximum) until the deice is completed.
[In case of heat pump model]
8
The compressor and indoor fan stop intermittently in
HEAT mode.
[In case of heat pump model]
9
Indoor fan and outdoor fan stop operation intermittently
in a HEAT mode.
The compressor and indoor fan stop intermittently if room
temperature exceeds a setting temperature in order to protect
the compressor from overheated air in a HEAT mode.
The compressor operates in a reverse cycle to remove
exterior ice in a HEAT mode, and indoor fan and outdoor fan
do not operate intermittently for within 20% of the total heater
operation
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Troubleshooting
4. Indoor unit observes operation condition of the air conditioner, and displays self diagnosis details on the display panel.
LAMP
Error Mode
Indoor unit room temperature sensor error
(open or short)
Indoor unit heat exchanger temperature sensor error
(open or short)
Indoor fan motor malfunction
EEPROM error
OPERATION TIMER TURBO
7-segment
Display
Option error
(option wasn't set up or option data error)
: Lamp off
5. Operation with abnormal motion
No Abnormal condition Inspection Initial Diagnosis
1
No response from
the remote control
operation signal.
2
Unable to operate the
outdoor unit
• Plug out and plug in 5 seconds
later.
• Press the TURBO button with the
remote control.
• In 3 minutes, check the voltage
between the indoor unit terminal
block N(1) and 1.
Able to operate the
remote control.
Unable to operate
the remote control.
AC198V ~ AC242V
No power source
displayed.
Press the (ON/OFF) button in the
indoor unit.
• If it operates, the remote control and
indoor unit receiver are in trouble.
• If not, the indoor unit is in trouble.
Problem with the outdoor unit or PCB
Problem with the relay (RY71) or PCB
Display
Flickering
: Lamp flickering
OK
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6-2 Fault Diagnosis by Symptom
6-2-1 No Power (completely dead)-Initial diagnosis
1. Checklist :
1) Is input voltage normal?
2) Is AC power linked correctly?
3) Is input voltage of DC regulator IC KA7805 (IC02) normal? (11VDC-12.5VDC)
4) Is output voltage of DC regulator IC KA7805 (IC02) normal? (4.5VDC-5.5VDC)
2. Troubleshooting procedure
Unplug the power cord and
plug it after 5 seconds
Press the Power Button on the
remote control unit to
operate the air conditioner
does not operate
◆ Check the indoor unit
control board
Check whether two wires
of power cord are
connected correctly to the
terminal block and control board.
Yes
Check whether the fuse on the
control board is normal.
FUSE: 3.15[A]/250[V]
Yes
Check the output of SMPS
on the control board.
Input power: AC230±15%[V]
IC02 Input: DC 12[V]
IC02 output: DC 5[V]
Yes
operate
No
No
No
◆ Check the display board
Reconnect wires correctly
Replace fuse
PCB should be replaced
◆ Check the setting temperature
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