Samsung AE040RXEDEG Service Manual page 76

4-3-2 Water pump & Flow Sensor error
Wired remocon display
Criteria
Cause of problem
1. How to check
* Water pump is detected only during operation
Does flow Sensor connector
come out of the PBA?
After putting out the connector(F/S)
from the PBA Measure its status is
low voltage or open?
low voltage or open?
- Outdoor unit capacity ≤ 9kW : When the water flow
rate is less than 0.7V or greater than 4.5V
- Outdoor unit capacity > 9kW : When the water flow
rate is less than 0.9V or greater than 4.5V
Check water pump operates properly
Check water flow rate
Is it proper?
Change water flow rate to proper level
Samsung Electronics
• Refer to how to determine below
Low flow rate error
• In case of low flow rate in 30 sec during water pump signals is ON(Starting)
• In case of low flow rate in 15 sec during water pump signals is ON(After Starting)
No
Yes
Yes
Yes
No
Yes
Re-start after put the connetor in the PBA.
No
Flow Sensor needs to be replaced.
(If water pump is running normally)
No
Water pump needs to be replaced
No
Re-start after replacing PBA.
E911
▶ Water pump ON (Low flow rate) : NOT enough water flow
▶ Water flow range
Outdoor unit capacity ≤ 9kW
Outdoor unit capacity > 9kW
Troubleshooting
Water flow rates (LPM)
Min Max
7 48
12 58
79