Sharp AE-Z35PR, Service Manual

Page: 38 / 64

3-15
AY-ZP35PR
<INDOOR UNIT> :1-second ON / 1-second OFF
Problem
symptom
Outdoor
unit indi-
cation
(LED1)
Indoor unit Malfunc-
tion No.
Content of diagnosis Check point Action
Lamp Main Sub Main Sub
Normal con-
dition Normal
blinking
Timer (Orange) 0 0 Normal
Operation (Green)
Plasmacluster
(Blue)
Indoor and
outdoor units
do not oper-
ate. 1-time Timer (Orange) 1 0 Outdoor unit
thermistor
short-circuit Heat exchanger
thermistor short
circuit error (1) Measure the resis-
tance of the outdoor
unit thermistors.
(1) Replace the out-
door unit ther-
mistor assembly.
Operation (Green)
Plasmacluster
(Blue)
Timer (Orange)
1 Outdoor temper-
ature thermistor
short circuit error (2) Check the lead wire
of the outdoor unit
thermistor for torn
sheath and shortcir-
cuit.
(2) Replace the out-
door unit ther-
mistor assembly.
Operation (Green)
Plasmacluster
(Blue)
Timer (Orange) 2 Suction ther-
mistor short cir-
cuit error (3) No abnormality
found in above
inspections (1) and
(2).
(3) Replace the out-
door unit control
PWB assembly.
Operation (Green)
Plasmacluster
(Blue)
Timer (Orange) 3 2-way valve
thermistor short
circuit error
Operation (Green)
Plasmacluster
(Blue)
Indoor and
outdoor units
do not oper-
ate. 2-time Timer (Orange) 2 0 Cycle tem-
perature Compressor high
temperature
error (1) Check the outdoor
unit air outlet for
blockage.
(1) Ensure unob-
structed air flow
from the outdoor
unit air outlet.
Operation (Green)
Plasmacluster
(Blue) (2) Check if the power
supply voltage is AC
230V at full power.
(2) Connect power
supply of proper
voltage.
(3) Check the pipe con-
nections for refriger-
ant leaks.
(3) Charge the speci-
fied amount of
refrigerant.
(4) Measure resistance
of the outdoor unit
compressor ther-
mistor.
(4) Replace the out-
door unit compres-
sor thermistor
assembly.
(5) Check the expansion
valve for proper
operation.
(5) Replace the
expansion valve
coil, expansion
valve or outdoor
unit control PWB
assembly.
Indoor unit
operates.
Outdoor unit
does not
operate tem-
porarily. Timer (Orange) 1 Compressor dis-
charge overheat. (Temporary stop for cycle
protection) -
Operation (Green)
Plasmacluster
(Blue)
Timer (Orange) 2 Outdoor unit heat
exchanger over-
heat. (Temporary stop for cycle
protection) -
Operation (Green)
Plasmacluster
(Blue)
Timer (Orange) 3 Indoor unit heat
exchanger over-
heat. (Temporary stop for cycle
protection) -
Operation (Green)
Plasmacluster
(Blue)
Timer (Orange) 4 IPM high temper-
ature error (Temporary stop for cycle
protection) -
Operation (Green)
Plasmacluster
(Blue)
Indoor and
outdoor units
do not oper-
ate. Timer (Orange) 5 IPM high temper-
ature error (1) Measure resistance
of the heat-sink ther-
mistor.
(1) Replace the out-
door unit PFCM
PWB or control
PWB assembly or
change the heat-
sink thermistor.
Operation (Green)
Plasmacluster
(Blue)
[9] CHART