Samsung AE040RXEDEG Service Manual page 78

4-3-3 Water pump & Flow Sensor error
Wired remocon display
Criteria
Cause of problem
1. How to check
* Water pump is detected only during stop
Does flow Sensor connector
come out of the PBA?
No
After putting out the connector(F/S)
from the PBA Measure its status is
low voltage or open?
Yes
Normal flow rate?
- Outdoor unit capacity ≤ 9kW : When the water
flow rate is less than 4.5V or greater than 0.7V
- Outdoor unit capacity > 9kW : When the water
flow rate is less than 4.5V or greater than 0.9V
No
After putting out the connector(F/S)
from the PBA Measure its status is
low voltage or open?
Yes
Is it short?
Yes
E912
▶ Water pump OFF (Normal flow rate)
▶ Water flow range
Outdoor unit capacity ≤ 9kW
Outdoor unit capacity > 9kW
Samsung Electronics
• Refer to how to determine below
Normal flow rate error
• In case of normal flow rate in 10min during water pump signal is OFF
Yes
Re-start after put the connetor in the PBA.
No
Water flow rates (LPM)
Min Max
7 48
12 58
Yes
Flow Sensor needs to be replaced.
(If water pump is off)
Does the water flow?
No
PBA needs to be replaced
Troubleshooting
Yes
No
Does any extra
water pump installed?
Yes
Check the extra pump
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