Display Eu; Display Ep; Display P1 - Sharp AY-X12PSR Service Manual

SHARP(CHINA)INVESTMENT CO.,LTD

6. Display EU

Problem symptom
Malfunction No.
1 The outdoor power source bord can't check the
voltage, check the votage lower or higher than the
protector voltage .

7. Display EP

Problem symptom
Malfunction No.
1 Check the insert position CN3 of the compressor
top temperature switch wires on outdoor power
source board
No switch on compressor top
2 Compressor
temperature. The
temperature
very
accompanied
with bad smell.
3 Compressor temperature: The temperature is not
high. Short circuit CN3.

8. Display P1

Problem symptom
Malfunction No.
1 Test the supply voltage if it is between 160V
AC .
Test if the voltage between L and N terminal of
2
outdoor unit is within 160V 260V AC .
3 If the voltage is normal:
Cause
Content of diagnosis
voltage sampling circuit
Cause
Content of diagnosis
Check the U, V and W wires of
the compressor.
is
Check the system pressure.
high,
Check the outdoor ventilation
and if there is any obstruction
that affects the normal radiating
of the air conditioner.
Cause
Content of diagnosis
Display EU
Voltage sensor fault
Insert again if loose.
Replace the outdoor power source board
3-14
Display EP
Temperature switch fault ( on top of the compressor)
Insert again if loose.
Jumper short-circuiting (This function not provided for 1 – 1.5P unit)
The correct sequence of U. V and W wiring shall be "red, white and
blue". Connect again if incorrect.
The pressure is low. Add refrigerant to ensure the system pressure
is normal.
Install to the position as required in the Installation Manual and
ensure the air inlet and outlet of the outdoor unit is smooth.
If the fault is solved after short circuiting, replace the shell
temperature switch.
If the fault remains unsolved after replacing the shell temperature
switch, please replace the outdoor power source board.
Display P1
Overvoltage / undervoltage protection
260V It is normal protection if exceeding this range.
It is normal protection if exceeding this range.
Replace the outdoor power source board
3-14
Action
Action
Action