Trip Detection
OK
OK
1. Outdoor unit fan operation defective, foreign matter on hear exchanger,
excessive rise of ambient temperature
2. Inverter PCB defective
3. Inverter compressor defective (lock, winding short)
Inverter PCB
"Protection stop by "overcurrent generation after inverter compressor start
processing completed'''' generated consecutively 5 times.
* The number of generations is reset if protection stop is not generated again
within 40 seconds after restarting.
No obstructions in air passages?
Heat exchange fins clogged
Outdoor unit fan motor check
Ambient temperature not raised by the effect of other heat sources?
Discharged air not sucked in?
Check Point 3 : Replace the Inverter compressor
Inverter compressor replacement
Check Point 2 : Check the Inverter PCB
Inverter PCB check (Refer to Service Parts Information 4)
Check Point 1 : Check the outdoor unit fan operation, heat exchanger, ambient temperature
Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash,
Filter LED Continuous Flash.
Outdoor Unit : E. 9 4. 1
Error Code : 9 U / 9 4
Trouble shooting 52 E94. 1
Indicate or Display:
Detective Actuators:
Detective details:
OUTDOOR UNIT Error Method:
Forecast of Cause :
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.
04-61
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