Air Conditioner Operation In Thermistor Error - Sharp AY-X12PSR Service Manual

SHARP(CHINA)INVESTMENT CO.,LTD
Outdoor unit
13
discharge thermistor
open-circuit error
Outdoor unit outside
14
air temperature
ther-mistor
short-circuit error
Discharge pipe
15
temperature themister
short-circuit error
Discharge pipe
16
temperature themister
open-circuit error
Serial signal error
17
Outdoor unit DC fan
18
error

[2] AIR CONDITIONER OPERATION IN THERMISTOR ERROR

1. Indoor unit
Item Mode
Room tempe- Auto
rature ther-
mistor (TH1)
Cooling
Dehumidifying
Heating
Heat exchanger Cooling
thermistor (TH2) Drying
Heating
2. Outdoor unit
Description
Indoor and outdoor unit stops
if there is short-circuit or
break in outdoor unit heat
exchanger thermistor
Indoor and outdoor unit stops
if there is short-circuit or
break in outdoor unit heat
exchanger thermistor
Indoor and outdoor unit stops
if there is short-circuit or
break in outdoor unit heat
exchanger thermistor
Indoor and outdoor unit stops
if there is short-circuit or
break in outdoor unit heat
exchanger thermistor
Indoor and outdoor unit stops
if outdoor unit cannot receive
serial signal from indoor unit
for 2minutes.
Operation stops if there is no
input of rotation pulse signal
from out-door unit fan motor
for 30 seconds
Control When resistance is
operation low (tempera-ture
judged higher than
actual)
Operation mode Cooling
judgment activated even if room
temperature is low.
Frequency con- Room becomes too cold
trol
Room temperature Normal operation.
memory frequency
control
Frequency control Room does not become
warm
Freeze prevention Indoor unit evaporator
may freeze.
Cold air prevention Cold
deactivates
and cold air discharges.
Detection
Reset condition
period
At compressor Operation OFF or ON
startup
At compressor Operation OFF or ON
startup
At compressor Operation OFF or ON
startup
At compressor Operation OFF or ON
startup
When in Reset after reception of
operation serial signal
When outdoor Operation OFF or ON
unit fan is in
operation
Short-circuit
mode is The unit stops
The unit stops
The unit stops
The unit stops
The unit stops
air prevention The unit stops
too soon
3-2
Indoor unit Indoor Outdoor
error display
unit
E3 yes
E8 yes
E8 yes
E8 yes
E0 yes
EF yes
When resistance Open-circuit
is high (tempera-
ture judged lower
than actual)
Heating mode is The unit stops
activated even if room
temperature is high.
Room does not The unit stops
become cool.
Normal operation. The unit stops
Room becomes too The unit stops
warm.
Compressor stops The unit stops
occasionally.
Cold air prevention The unit stops
deactivates too slow.
unit
yes
yes
yes
yes
yes
yes