Fujitsu AB* A12GATH, Service Manual

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Trouble shooting 50 E86. 4
OUTDOOR UNIT Error Method:
Indicate or Display:
OK
OK
Detective Actuators:
High pressure switch 1
Detective details:
Forecast of Cause :
1. High pressure switch 1 connector disconnection, open
2. High pressure switch 1 characteristics defective
3. Main PCB defective
When the power was turned on, "high pressure switch 1: open" was detected.
Check Point 1 : Check the high pressure switch 1 connection state
Connector and wiring connection state check
Cable open check
Check Point 2 : Check the high pressure switch 1 characteristics
Switch characteristics check
* For the characteristics of high pressure switch 1, refer to the "Service Parts Information 23".
Check Point 3 : Replace Main PCB
Change Main PCB and set up the original address.
Outdoor Unit : E. 8 6. 4
Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash,
Filter LED Continuous Flash.
Error Code : 9 U / 8 6
High Pressure Switch 1 Error
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.
04-62