Fujitsu AUXG36KRLB Service Manual page 94

2-35. E: AC. Heat sink temperature error (Outdoor unit)
Wired remote
Indicator
controller
Outdoor unit inverter PCB
Detective actuator
Heat sink temperature thermistor
Forecast of cause
Check point 1. Check the heat sink state
Heat sink foreign matter, soiling check
Check point 2. Check the foreign matter and ambient temperature of heat exchanger
• Heat exchange foreign matter check
• Ambient temperature not raised by effect of other heat sources?
• Discharged air not sucked in?
Check point 3. Check the heat sink temperature thermistor
The heat sink temperature thermistor characteristics check. (Check by disconnecting thermistor
from PCB.)
NOTE: For the characteristics of the thermistor, refer to
03-62.
Check point 4. Replace inverter PCB
Replace inverter PCB
2-35. E: AC. Heat sink temperature error (Outdoor unit)
Error code
↓
↓
↓
↓
End
Protection stop by heat sink temperature ≥ 80 °C during
heat sink operation generated 2 times within 24 hours.
Foreign matter on heat sink, heat sink dirty
Foreign matter on heat exchanger, excessive ambient
temperature rise
Heat sink temp. thermistor defective
"Thermistor resistance values"
- (03-44) -
E: AC
on page
2. Troubleshooting with error code