Trouble shooting 68 EAC. 4
OUTDOOR UNIT Error Method:
Outdoor unit Heat Sink Tempreture
Abnormal
Indicate or Display:
Detective Actuators:
Detective details:
Forecast of Cause :
OK
OK
Check Point 1 : Check the heat sink state
1. Foreign matter on heat sink, heat sink dirty
2. Foreign matter on heat exchanger, excessive ambient temperature rise
3. Heat sink temp. sensor defective
Heat sink temp. sensor
"Protection stop by
"heat sink temp. 91°C(195.8°F) " occurred 3 times within 60 minutes.
Heat sink temp. sensor characteristics check
(Check by disconnecting sensor from PCB.)
* For the characteristics of the thermistor, refer to "Service Parts Information 25".
Check Point 3 : Check the heat sink temp. sensor
Heat sink foreign matter, soiling check
Heat exchange foreign matter check
Ambient temperature not raised by effect of other heat sources?
Discharged air not sucked in?
Check Point 2 :
Check the foreign matter and ambient temperature of heat exchanger
Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash,
Filter LED Continuous Flash.
Outdoor Unit : E. A C. 4
Error Code : 9 U / A C
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.
04-77
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