Troubleshooting
4-56
Samsung Electronics
4-4-12
: Detection of Floating Switch of Indoor Unit's Drain Pump
1. How to check
S
To release E153 error, you must reset the power of the indoor unit.
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
When checking the
resistance value of both terminals after
disconnecting a floating sensor connector linked
to an indoor unit PCB, is resistance
valve = ∞ ?
Is there a lot of water in the drain plate?
Does Drain pump run
during COMP operation?
Diagnosed as a defective
Floating sensor
No
Drain pump PCB unit
voltage = around AC220V?
Does the water level
in the Drain Pan get lower?
Reset the power of the indoor unit
then check if drain pump operates
(vibrates during operation)
Normal operation
Indoor unit's power reset
after replacement
Reassembly Floating Sensor Connector
and reset Outdoor Unit power
(Indoor unit power reset required)
Normal operation
Diagnosed as a defective
Floating sensor Indoor unit's
power reset after replacement
Replace Drain pump
Replace Drain pump
Replace Indoor Unit PCB
Error occurs
Float sensor error will be removed
only when the remote controller
for an indoor unit operates
Outdoor unit display
x x x(x x x : The address of the error occurred indoor unit)
Indoor unit display
×(Operation) ×(Timer)
◑
(Fan)
◑
(Filter) ×(Defrost)
Criteria
• Refer to how to determine below
Cause of problem
• Due to the breakdown of a drain pump of the indoor unit, an increase in the water level in the drainage
plate or defective detection sensor
