Fujitsu ASU18RLF Service Manual

1. Discharge pressure sensor connector disconnection, open eruliaf rosnes erusserp egrahcsiD .2
3. Main PCB failure
1
CN92
1
RED
PRESSURE SENSOR
WHITE
BLACK
PS
22
33
Trouble shooting 27
OUTDOOR UNIT Error Method:
Discharge Pressure Sensor Error
Discharge pressure sensor
=
Detective Actuators: Detective details:
Indicate of Display:
Forecast of Cause:
02-32
When any of the following conditions is satisfied, a discharge pressure
sensor error is generated.
30 seconds or more have elapsed since the outdoor unit power was
turned on and pressure sensor detected value < 0.3V continued
for 30 seconds or more
30 seconds or more have elapsed since the outdoor unit power was
turned on and pressure sensor detected value > 5.0V was detected.
・
OK
Test 3 : Check voltage of Main PCB (DC5.0V)
DC
OK
Test 1 : Check the discharge pressure sensor connection state
Connector connection state check
Cable open check
Test 2 : Check the discharge pressure sensor
Sensor characteristics check
*For the characteristics of the discharge pressure sensor,
refer to the (SERVICE PARTS INFORMATION 6).
Main PCB (CN92:1-2) voltage value = 5V
Remove the PRESSURE SENSOR from Main PCB, check the voltage.
Discharge pressure sensor (CN92:1-2)
If the voltage does not appear, replace Main PCB,
and execute the check operation again.
Indoor Unit
Outdoor Unit
Operation lamp : 8 time Flash
ERROR CODE : [E : 86]
Timer lamp: 6 time Flash
Monitor
ABCDEF
8
: Light ON : Light OFF n : n time blinking
6

Fujitsu ASU18RLF Specifications

General

Brand	Fujitsu
Model	ASU18RLF
Category	Air Conditioner
Language	English