Compressor 1 Temperature Abnormal; Compressor Temp. Sensor 1 - Fujitsu Airstage VR-II Series Service Manual

Trouble shooting 62
OUTDOOR UNIT Error Method:

Compressor 1 Temperature Abnormal

Detective Actuators:

Compressor temp. sensor 1

Forecast of Cause :
1. 3-way valve not opened
2. EEV defective, strainer clogged
3. Outdoor unit operation defective, foreign matter on heat exchanger
4. Compressor 1 temp. sensor defective
5. Insufficient refrigerant
<Cooling/ Cooling main operation>
Check Point 1 : Check if 3-way valve is open.
If the 3-way valve was closed, open the
3-way valve and check operation.
OK
Check Point 2 : Check the EEV, strainer
EEV (EEV1, EEV2, EEV3, indoor unit EEV) open?
Strainer clogging check (before and after EEV, ACM
oil return)
Refer to "Service Parts Information 15, 16, 17".
OK
Check Point 3 : Check the outdoor unit fan,heat exchanger
Check for foreign matter at heat exchanger
Check if fan can be rotated by hand.
Motor check
OK
Check Point 4 : Check the compressor 1 temp. sensor
Compressor 1 temp. sensor characteristics check
(Check by disconnecting sensor from PCB.)
* For the characteristics of the sensor, refer to the "Service Parts Information 25".
OK
Check Point 5 : Check the refrigerant amount
Leak check
After fixing the problem and for canceling the Error, Error Reset (F3-40) will be required after power reset
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:
EA3. 1
Outdoor Unit : E. A 3. 1
Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash,
Error Code : 9 U / A 3
Detective details:
"Protection stop by "compressor 1 temp.
operation"" generated 2 times within 40 minutes.
04-71
Filter LED Continuous Flash.
115°C (239°F)during compressor 1
<Heating/ Heating main operation>
Check Point 1 : Check if 3-way valve is open.
If the 3-way valve was closed, open the
3-way valve and check operation.
OK
Check Point 2 : Check the EEV, strainer
EEV (EEV1, EEV2, EEV3) open?
Strainer clogging check (before and after EEV, ACM
oil return)
Refer to "Service Parts Information 15, 16, 17".
OK