Samsung AVMKH020EA0 Service Manual page 267

8
Troubleshooting
8-2-86. Floating switch detection of the indoor unit drain pump
Outdoor unit display
Indoor unit display
Judgment method
Causes
✳For the release of E153 error, the power of indoor unit should be reset.
Is the cassette type indoor unit
occurred error?
Yes
Is the value of
resistance of both terminals
∞ which measured after
disconnecting the connecter of float
switch connected with indoor
unit PCB ?
Yes
Is there large water in the
drain plate?
Yes
Reset the power of indoor unit and check
if the drain pump is operated.
Yes
Does the drain pump operate?
Yes
Is the water level of drain
plate down?
Yes
Replace the drain pump.
1 detection : (Displayed only outdoor unit)
st
2 detection : x x x (x x x : Indoor unit address occurred error)
nd
(Operation) (Filter)
- Refer to the below judge method
- The rising water level of drain plate due to the defect of drain pump of indoor unit or
- Detection sensor defect
No
Refer to the 245 page drain pump(Option) for
No
No
Is the terminal voltage of drain
pump PCB about AC220V?
No
Replace the drain pump.
Normal operation
- 266 -
solving the trouble.
No
Reassemble the float switch connecter and
reset the power of indoor/outdoor unit.
Is the same error occurred again?
Yes
Replace the indoor unit PCB.
Replace the float switch and reset the
power of indoor unit because it is the
defect of float switch.
Yes
Replace the indoor unit PCB.
No
Normal operation
No