Suction Pressure Sensor Error; Suction Pressure Sensor - Fujitsu Airstage VR-II Series Service Manual

Trouble shooting 49
OUTDOOR UNIT Error Method:

Suction Pressure Sensor Error

Detective Actuators:

Suction pressure sensor

Forecast of Cause :
1. Suction pressure sensor connector disconnection, open
2. Suction pressure sensor defective
3. Main PCB defective
Check Point 1 : Check the suction pressure sensor connection state
Connector connection state check
Cable open check
OK
Check Point 2 : Check the suction pressure sensor
Sensor characteristics check
* For the characteristics of the suction pressure
refer to the "Service Parts Information 23".
OK
Check Point 3 : Check voltage of Main PCB (DC5.0V)
Main PCB (CN119:1-3) voltage value = 5V
Remove the sensor from Main PCB, check the voltage.
Suction pressure sensor (CN119:1-3)
If the voltage does not appear, replace Main PCB and set up original address.
Caution
By changing of DIP SW 4-2 to ON, the Back-up operation can start when the active outdoor unit exists on the multi outdoor unit connection.
(Stand alone outdoor unit is impossible)
The following conditions will be concerned in use of back-up operation. (Please do not use the system with back-up operation for long time.)
- The operating compressor life time becomes shorter.
- The operating performance may drop due to the limited active compressor(s).
- The compressor may stop frequently by protection controlling.
*In order to keep the operating capacity, the release of the Low noise mode setting might be necessary.
Indicate or Display:
E86. 3
Outdoor Unit : E. 8 6. 3
Indoor Unit
Error Code
Detective details:
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
or more.
2. 30 seconds or more have elapsed since the outdoor unit power was turned
on and pressure sensor detected value
sensor
,
PS
1 2 3
1 2 3
CN119
: Operation LED 9 times Flash, Timer LED 15 Times Flash,
Filter LED Continuous Flash.
: 9 U / 8 6
DC
04-58
0.06V continued for 30 seconds
5.0V was detected.