Trouble shooting 49 E86. 3
OUTDOOR UNIT Error Method:
Suction Pressure Sensor Error
Indicate or Display:
Check Point 3 : Check voltage of Main PCB (DC5.0V)
DC
CN119
WHITE
RED
123
123
BLACK
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 value 5.0V was detected.
1. Suction pressure sensor connector disconnection, open
2. Suction pressure sensor defective
3. Main PCB defective
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 23".
Suction pressure sensor (CN119:1-3)
Main PCB (CN119:1-3) voltage value = 5V
Remove the sensor from Main PCB, check the voltage.
Outdoor Unit : E. 8 6. 3
Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash,
Filter LED Continuous Flash.
Error Code : 9 U / 8 6
If the voltage does not appear, replace Main PCB and set up original address.
PRESSURE
SENSOR
(LOW)
PS
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.
04-58
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