Service Manual

Trouble shooting 28
OUTDOOR UNIT Error Method:
Suction Pressure Sensor Error
Indicate or Display:
Check Point 3 : Check voltage of Main PCB (DC5.0V)
DC
CN92
WHITE RED
PRESSURE SENSOR (LOW)
123
123
BLACK
PS
Detective Actuators:
Detective details:
Forecast of Cause :
OK
Suction pressure sensor
When any of the following conditions is satisfied, a suction pressure
sensor error is generated.
1. 30 seconds or more have elapsed since the outdoor unit power was turned
on and pressure sensor detected value 0.06V continued for 30
seconds or more.
2. 30 seconds or more have elapsed since the outdoor unit power was turned
on and pressure sensor detected v
alue 5.0V was detected.
1. Suction pressure sensor connector disconnection, open
2. Suction pressure sensor failure3. Main PCB failure
OK
Check Point 1 : Check the suction pressure sensor connection state
Connector connection state check
Cable open check
Check Point 2 : Check the suction pressure sensor
Sensor characteristics check
* For the characteristics of the suction pressure
sensor,
refer to the "Service Parts Information 6".
Suction pressure sensor (CN92:1-3)
Main PCB (CN92:1-3) voltage value = 5V
Remove the thermistor from Main PCB, check the voltage.
Outdoor Unit : E. 86. 3
Indoor Unit : Operation LED 8 times Flash, Timer LED 6 Times Flash,
Economy LED Continuous Flash.
Error Code : 86
If the voltage does not appear, replace Main PCB
, and execute
the check operation again.
02-45