Fujitsu AUXB04GALH Service Manual page 149

Trouble shooting 61
OUTDOOR UNIT Error Method:
Discharge Tempreture 1 Abnormal
Detective Actuators:
Discharge 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. Discharge temp. sensor 1 defective
5. Insufficient refrigerant
<Cooling 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 14, 15, 16".
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 discharge temp. sensor 1
Discharger temp. sensor 1 characteristics check
(Check by disconnecting sensor from PCB.)
* For the characteristics of the sensor, refer to the "Service Parts Information 24".
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:
EA1. 1
Outdoor Unit : E. A 1. 1
Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash,
Error Code : 9 U / A 1
Detective details:
"Protection stop by "discharge temp. 1
operation"" generated 2 times within 40 minutes.
04-73
Filter LED Continuous Flash.
115°C (239°F) during compressor 1
<Heating 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 14, 15, 16".
OK